Abstract: An air conditioning recharging machine includes a pair of flexible hoses connected to the air-conditioning system and a recharging assembly to supply a refrigerant fluid to the air-conditioning system through the flexible hoses. The machine has a discharging assembly to discharge the refrigerant fluid from the air-conditioning system and a valve distributor body, which is provided with a series of inlets/outlets hydraulically connected to the flexible hoses, to the recharging assembly and to the discharging assembly. The valve distributor body is in the form of a monobloc made of rigid material which is provided with straight inner through-ducts, each of which extends in the monobloc so as to have the two axial ends which are arranged on two respective faces of said monobloc opposite one to the other, and are each closed by a respective solenoid valve coupled to the face itself.

Abstract: The present application provides a control method and device for an air conditioning unit, the method including: obtaining a return air temperature, a condensation temperature, an evaporation temperature, compressor parameters, and fan parameters of the air conditioning unit; determining a preset evaporation temperature according to the return air temperature, the condonation temperature, the evaporation temperature, the compressor parameters, the fan parameters, a compressor power curve, and a fan power curve, wherein the sum of a compressor power and a fan power is minimized at the preset evaporation temperature; determining a preset compressor frequency and a preset fan frequency corresponding to the preset evaporation temperature according to the compressor power curve and the fan power curve; controlling a compressor according to the preset compressor frequency; and controlling a fan according to the preset fan frequency.

Abstract: An air conditioning apparatus includes: an outdoor unit configured to circulate refrigerant; an indoor unit configured to circulate water; a heat exchange device that connects the indoor unit to the outdoor unit and that is configured to perform heat exchange between the refrigerant and the water; and a plurality of pipes and valves. The heat exchange device includes first and second heat exchangers. The air conditioning apparatus is configured to perform a cooling operation or a heating operation based on operating one or both of the first heat exchanger and the second heat exchanger and one or more of the valves.

Abstract: A refrigeration cycle apparatus includes a main circuit through which refrigerant circulates and in which a compressor, a condenser, a first expansion device, a centrifugal gas-liquid separator that separates refrigerant into gas refrigerant and liquid refrigerant by using centrifugal force, and an evaporator are connected by refrigerant pipes; and a bypass that returns the gas refrigerant obtained through the separation by the gas-liquid separator to a suction side of the compressor. The gas-liquid separator includes a cylindrical container, an inflow pipe, a gas outflow pipe, and a liquid outflow pipe. The main circuit includes a second expansion device provided between the liquid outflow pipe of the gas-liquid separator and the evaporator. The gas refrigerant discharged from the gas outflow pipe of the gas-liquid separator flows into the bypass, and the bypass is provided with a third expansion device.

Abstract: A method of evaluating performance of a chiller is provided. The method includes detecting a plurality of operating parameters of the chiller with a plurality of sensors. The method also includes individually determining a first coefficient of performance degradation due to condenser fouling. The method further includes individually determining a second coefficient of performance degradation due to condenser water flow reduction. The method yet further includes individually determining a third coefficient of performance degradation due to evaporator fouling. The method also includes determining a total coefficient of performance degradation of the chiller with a summation of the first, second and third coefficient of performance degradations.

Abstract: An air conditioning system provided which has: an outdoor device including at least a compressor and a first heat exchanger; an air handling device including an air supply fan and a second heat exchanger; an expansion valve; and a control section, wherein the compressor, the first heat exchanger, the expansion valve, and the second heat exchanger are sequentially connected in an annular shape to form a refrigerant circuit in which refrigerant circulates, and the control section adjusts a rotation speed of the air supply fan and/or a degree of opening of the expansion valve based on information including a temperature detection value of refrigerant on each of one end side and the other end side of the second heat exchanger, a temperature detection value of air toward the second heat exchanger, and a temperature detection value of air heat-exchanged by the second heat exchanger.

Abstract: Provided is a control method for an electronic expansion valve in air conditioner comprises: obtaining a real-time running frequency of compressor, a real-time exhaust temperature and a real-time outdoor environment temperature as the compressor running; retrieving a target exhaust temperature according to the real-time running frequency in a preset relation in which each available target exhaust temperature is paired with a single real-time running frequency, wherein the target exhaust temperature retrieved being defined as a first target exhaust temperature; defining a sum of the first target exhaust temperature and a set compensation temperature as a second target exhaust temperature, wherein the set compensation temperature is determined by the real-time outdoor environment temperature; and performing a PID control on opening amount of the electronic expansion valve based on a deviation that is a difference between the real-time exhaust temperature and the second target exhaust temperature.

Abstract: Methods, systems, and apparatus for a heating, ventilation and air conditioning (HVAC) system that limits the speed of the compressor to allow for the adoption or use of an internal heat exchanger. The HVAC system includes a compressor configured to drive refrigerant flow and an inverter configured to control a speed of the compressor. The HVAC system includes a first sensor configured to measure a temperature of the inverter and an electronic control unit. The electronic control unit is configured to obtain, from the first sensor, the temperature of the inverter. The electronic control unit is configured to determine a range of speeds for the compressor based on the obtained temperature of the inverter. The electronic control unit is configured to operate the compressor within the determined range of speeds.

Abstract: Provided is a refrigerant container having a rational structure with a small number of components, the container having both the functions of a receiver and an accumulator. Specifically, the refrigerant container includes a tank 10 capable of temporarily storing a refrigerant; and a gas/liquid inlet port 15, a liquid-phase outlet port 16, and a gas-phase outlet port 17 that are provided in an upper portion of the tank 10. The refrigerant container 1 is adapted to separate a refrigerant introduced through the gas/liquid inlet port 15 into a liquid-phase refrigerant and a gas-phase refrigerant, and has the function of a receiver that guides only the liquid-phase refrigerant after the separation to the side of an expansion valve via the liquid-phase outlet port 16, and the function of an accumulator that guides the gas-phase refrigerant after the separation to the suction side of a compressor via the gas-phase outlet port 17 together with oil contained in the liquid-phase refrigerant.

Abstract: A control unit is configured to set a rotation speed of a compressor to be lower than that in a defrosting operation and set an opening degree of a pressure reducing device to be equal to or greater than that in the defrosting operation during a first control time after completion of the defrosting operation, stop the compressor and set the opening degree of the pressure reducing device to be less than that in the first control time during a second control time after lapse of the first control time, and control a refrigerant circuit switching device to resume a heating operation after lapse of the second control time.

Abstract: An improved frozen product dispenser wherein a product is placed into a cooled hopper and the product is then fed from the hopper into a freezing and dispensing chamber where it is frozen and dispensed. Applicants have further created improved methods and apparatuses for to control the refrigeration and freezing systems of the exemplary frozen product machines are disclosed herein.

Abstract: A control unit for a climate control system for a vehicle, comprising; a monitoring module arranged to monitor at least one demand representative of an environmental parameter change within the vehicle and/or at least one active user input relating to an environmental parameter within the vehicle; a storage means storing a control policy for configuring at least one climate control element; a feedback module configured to receive the at least one demand from the monitoring module and to receive a simulated control policy from a simulation module; wherein the feedback module is configured to update the control policy, based on the simulated control policy, in response to receiving the at least one demand; and an implementation module for controlling said at least one climate control element in accordance with said control policy.

Abstract: Provided is an air conditioning apparatus that is capable of suppressing increases in volume and cost of the apparatus and performing more suitable overheating protection. An electric compressor is an inverter-integrated electric compressor (10) integrally including a compressor (5), an electric motor (6) that drives the compressor (5), and an inverter (7) including a temperature sensor (11) that detects the temperature in the vicinity of a semiconductor switching device, wherein a controller (3) estimates a discharge temperature of the compressor (5) on the basis of a correlation of respective pressure loading characteristics for the detected temperature of the inverter (7), for the rotational speed of the compressor (5), and for the motive force of the compressor (5) in a refrigerating cycle (2).

Abstract: Disclosed are a method and a device for controlling refrigerant in an air conditioning system. The method includes: S1: comparing a superheat degree of each outdoor unit with an average superheat degree; S2: if the superheat degree of a present outdoor unit is higher than the average superheat degree, and a first different between the superheat degree of the present outdoor unit and the average superheat degree is greater than a present value, increasing a refrigerant amount entered into the present outdoor unit; and S3: if the superheat degree of the present outdoor unit is lower than the average superheat degree, and a second different between the average superheat degree and the superheat degree of the present outdoor unit is greater than the present value, decreasing the refrigerant amount entered into the present outdoor unit. Therefore, the refrigerant amount entered into each outdoor unit is adjusted from systemic overall perspective.

Abstract: A vehicle air conditioner to be installed in a passenger compartment S includes a casing, a piping component, and a seal 60. The casing accommodates a heat exchanger. The piping component supplies a heating medium to the heat exchanger or exhausts the heating medium from the heat exchanger. The seal 60 seals a portion between the casing and a periphery of an opening P of a dash panel P of a vehicle. The dash panel P separates the passenger compartment S from an outside of the passenger compartment S. The piping component is inserted into the opening. The seal 60 has a surface facing the dash panel P and including a notch 60d. The notch 60d is positioned outside the periphery of opening P1.

Abstract: A heat exchanger includes a first header pipe, a second header pipe, a third header pipe, a fourth header pipe and a plurality of flat tubes, the first header pipe is provided with a first space and a second space and a communicating passage for communicating the first space with the second space; when refrigerant flows from the first space of the first header pipe to the second header pipe along the flat tubes, a part of the refrigerant passes through the communicating passage and directly enters into the second space of the first header pipe, thus an overall flow resistance of the heat exchanger may be decreased to some extent. Besides, the flow quantity of the refrigerant in the third flow path is constant, however fluid state parameters may change, which may greatly improve the heat exchange capacity of the third flow path, thereby improving the heat exchange performance of the heat exchanger on the whole.

Abstract: A valve-in-receiver (VIR) for a vehicle climate control system includes a receiver drier (RD) shell including an outer surface and an inner surface defining an interior portion having an opening, and a cap member mounted to the RD shell across the opening, the cap member including an evaporator inlet portion, an evaporator outlet portion, a condenser inlet and a compressor outlet.

Abstract: A stabilizer has a tip portion at a boundary between the stabilizer and a nozzle, and a projection on the lower side of the tip portion, and a first recess is formed between the projection and the tip portion in a continuously recessed shape in the longitudinal direction of the cross flow fan.

Abstract: A cold storage heat exchanger has refrigerant pipes and a cold storage material. Each of the refrigerant pipes has a refrigerant passage therein. The refrigerant pipes are arranged so as to be distanced from each other with clearances therebetween. The cold storage material is disposed in at least one of the clearances. At least another one of the clearances provides an air passage. The heat storage material is disposed in at least two of the clearances arranged adjacent to each other.

Abstract: A disclosed device cryogenic refrigerator includes a first stage displacer; a first stage cylinder configured to form a first expansion space between the first stage cylinder and the first stage displacer; a second stage displacer connected to the first stage displacer; and a second stage cylinder configured to form a second expansion space between the second stage cylinder and the second stage displacer, wherein the second stage displacer includes a helical groove formed on an outer peripheral surface of the second stage displacer so as to helically extend from the second expansion space, a flow resistor communicating with a side of the first stage displacer in the helical groove, and a flow path connecting the flow resistor to a side of the first expansion space, wherein the flow resistor is always positioned on a side of the second expansion space relative to the first expansion space.

Abstract: To provide an air-conditioning apparatus that reduces large refrigerant noise generated when changing an operation mode. In an air-conditioning apparatus, when switching to a second operation mode from a first operation mode, switching to the second operation mode is performed after a predetermined time has elapsed after controlling either or all of expansion devices, controlling either or all of second flow switching devices, and controlling either or all of a first on-off device and a second on-off device such that a pressure difference of a heat source side refrigerant before and after each of the expansion devices is smaller compared to that in an operation state of the first operation mode.

Abstract: An air conditioner includes a refrigerant circuit configured to interconnect a heat source unit and a utilization unit, a transmission line that exchanges a signal between the heat source unit and the utilization unit, an information obtaining section, an operation controlling section capable of performing a refrigerant quantity judging operation, a refrigerant quantity judging section, and a condition setting section. The information obtaining section obtains information on the utilization unit connected to the heat source unit via the transmission line. The refrigerant quantity judging section judges the adequacy of the refrigerant quantity in the refrigerant circuit by using the operation state quantity of constituent equipment or refrigerant flowing in the refrigerant circuit in the refrigerant quantity judging operation.

Abstract: The invention relates to a refrigerant circuit and a process for operation of the refrigerant circuit of an HVAC system of a vehicle, particularly an electric or hybrid vehicle. The refrigerant circuit includes a primary circuit with a compressor, a heat exchanger for heat transmission between the refrigerant and the environment, a collector, a first expansion member, a heat exchanger for supply of heat from the fresh air to be conditioned of the vehicle interior to the refrigerant and a heat exchanger arranged switched in parallel to the heat exchanger. Further, the refrigerant circuit is provided with a secondary train that extends starting from a tapping point positioned between the compressor and the heat exchanger up to a connection point and is provided with a heat exchanger for heat transmission from the refrigerant to the fresh air to be conditioned for the vehicle interior, and a subsequent control valve.

Abstract: A controller can be connected to a heat transfer system including pressure and temperature sensors, an electrically controlled valve, and a compressor. The controller can be configured to control the heat transfer system according to compressor suction superheat, compressor discharge superheat, compressor suction pressure, compressor discharge pressure, and temperature of water received at a condenser to be heated by waste-heat bearing fluid in an evaporator. The controller can include a touchscreen configured to display a user control interface configured to display views based on a permissions database defining different types of users. The views can include different views having different input fields, output fields, and output graphs. The permissions database can permit input of control loop parameters by one of the different types of users and prevent input of control loop parameters by another of the different types of users.

Abstract: A thermal management system is provided for a vehicle having an electric traction motor. The system includes a coolant system configured to convey coolant through a first thermal load, a refrigerant circuit including a condenser and a compressor configured to compress a refrigerant, a control system and a sensor. The refrigerant circuit is configured to cool at least one second thermal load. The sensor is configured to send signals to the control system that are indicative of a temperature of the first thermal load. The control system is configured to control an outlet pressure of the compressor based on the signals.

Abstract: An expansion valve for a vapor compression system comprises a first valve member and a second valve member. The first valve member and the second valve member are arranged movably relative to each other, and the relative position of the first valve member and the second valve member determines an opening degree of the expansion valve. The first valve member and/or the second valve member is/are automatically movable in response to changes in a differential pressure across the expansion valve, the opening degree of the expansion valve thereby being automatically altered in response to changes in the differential pressure across the expansion valve. It is ensured that the opening degree of the expansion valve is automatically adjusted to the actual operating conditions, thereby optimising the efficiency of the vapour compression system.

Abstract: A vapor-liquid separating space is provided in a body. The body houses a fixed throttle-decompressing liquid-phase refrigerant, and an integration valve member selectively opening or closing a liquid-phase refrigerant passage and a vapor-phase refrigerant passage. The integration valve member is moved by a stepping motor connected to the integration valve member via a shaft. Accordingly, a cycle configuration of a heat pump cycle working as a gas injection cycle can be simplified.

Abstract: A cooling system has a cabinet and a plurality of separate cooling stages including an upstream cooling stage and a downstream cooling stage. At least the upstream cooling state is a variable capacity cooling stage. Each cooling stage has a cooling circuit. Evaporators of the cooling circuits are arranged in the cabinet so that air passes over them in serial fashion. A controller when a Call for Cooling first reaches a point where cooling is needed, operating the upstream cooling circuit to provide cooling and not the downstream cooling circuit. When the Call for Cooling has increased to a second point, the controller additionally operates the downstream cooling circuit to provide cooling. The cooling capacity at which the upstream cooling circuit is being operated is less than its full capacity when the Call for Cooling reaches the second point.

Abstract: A heat pump apparatus includes: a refrigerant circuit which includes a compressor, an utilization-side heat exchanger, a first expansion valve, and an outdoor heat exchanger; an injection pipe which includes a solenoid switching valve and a second expansion valve; and an objective supercooling degree table which stores objective supercooling degrees according to condensing pressure in the refrigerant circuit and rotation number of the compressor. In the heat pump apparatus, liquid refrigerant is injected to the compressor by way of the injection pipe. The heat pump apparatus switches between a first case where the liquid refrigerant is injected to the compressor and a second case where the liquid refrigerant is not injected, and a value of the objective supercooling degree is changed between the first case and the second case to control the first expansion valve based on the value of the objective supercooling degree.

Abstract: A heat pump apparatus includes: a refrigerant circuit which includes a compressor, a utilization-side heat exchanger for exchanging heat between water and refrigerant, an electronic expansion valve, and an outdoor heat exchanger; a controller which controls the compressor and the electronic expansion valve; a subcooling value calculating unit which calculates a subcooling value of the refrigerant circuit; a condensing pressure detector which detects condensing pressure of the compressor; a compressor rotation number detector which detects rotation number of the compressor; and an objective subcooling value extracting unit which selects and extracting an objective subcooling value stored in advance, from the condensing pressure and the rotation number of the compressor. The controller adjusts an opening degree of the electronic expansion valve so that the calculated subcooling value of the refrigerant circuit reaches the objective subcooling value.

Abstract: A two temperature electronic expansion valve control for variable speed compressors that utilizes a correlation between airflow percentage and heat exchanger pressure drop to control the operation of an expansion valve. An indoor airflow percentage request may be communicated from an outdoor controller to an air handler controller. Using a correlation between airflow percentage and pressure drop across the heat exchanger, the airflow percentage may be used in predicting an outlet pressure of refrigerant exhausted from the heat exchanger. The predicted pressure drop may be used in determining a saturated temperature for the exhausted refrigerant. The determined saturated temperature may be compared to a sensed temperature of the refrigerant at the outlet of the heat exchanger to determine a superheat value, which is compared to a reference superheat value in determining the degree to open or close the expansion valve.

Abstract: An improved power element for use with a thermal expansion valve. The power element contains a filter positioned at an open end of the power element to prevent debris from entering the body of the thermal expansion valve.

Abstract: A refrigerating apparatus, where refrigerant reaches a supercritical state in at least part of a refrigeration cycle, includes at least one expansion mechanism, an evaporator connected to the expansion mechanism, first and second sequential compression elements, a radiator connected to the discharge side of the second compression element, a first refrigerant pipe interconnecting the radiator and the expansion mechanism, a heat exchanger arranged to cause heat exchange between the first refrigerant pipe and another refrigerant pipe. Preferably, a heat exchanger switching mechanism is switchable so that refrigerant flows in the first refrigerant pipe through the first heat exchanger or in a heat exchange bypass pipe connected to the first refrigerant pipe.

Abstract: A system, compressor, and method that cools an electronics module with a low-pressure refrigerant. The system, compressor, and method utilize a temperature sensor that detects a temperature of the low pressure refrigerant and communicates with the electronics module. Based on the temperature detected by the temperature sensor, the electronics module controls a liquid dry out point of the refrigerant that is used to cool the electronics module.

Abstract: A refrigeration system including a condenser having a condenser inlet and a condenser outlet, a compressor fluidly connected to the condenser inlet, and an evaporator including an evaporator inlet and an evaporator outlet. The evaporator outlet is fluidly connected to the compressor. A compressor speed sensor senses an operational speed of the compressor. An electric expansion valve (EEV) is fluidly connected to the condenser outlet and the evaporator inlet. The EEV includes a valve member that is selectively positioned to establish a desired opening to pass refrigerant from the condenser to the evaporator. A controller is electrically connected to the EEV and the compressor speed sensor. The controller establishes the desired opening of the valve member based on one of a cooling mode superheat value and a heating mode super heat value, and the operational speed of the compressor.

Abstract: A temperature sensitive rod is communicated with a diaphragm that is displaceable in response to a pressure difference between an internal pressure of a sealed space, in which a temperature sensitive medium is sealed, and a pressure of a low pressure refrigerant outputted from an evaporator. A blind hole, which opens to the sealed space, is formed in an inside of the temperature sensitive rod. The temperature sensitive medium is a mixture gas of the refrigerant and an inert gas. A mixing ratio of the inert gas in the temperature sensitive medium corresponds to a ratio of an equivalent diameter of the blind hole relative to a depth of the blind hole in such a manner that a time constant of heat conduction from the temperature sensitive rod to the temperature sensitive medium is kept within a desired time constant range.

Abstract: An air conditioning apparatus includes a refrigerant circuit, an operation controlling device and a liquid refrigerant accumulation determining device. The refrigerant circuit has an accumulator. The operation controlling device performs normal operation control where each device of the heat source unit and the utilization unit are controlled in accordance with operating load of the utilization unit, and refrigerant quantity determination operation control where properness of quantity of the refrigerant in the refrigerant circuit is determined while performing the cooling operation. The liquid refrigerant accumulation determining device determines whether or not liquid refrigerant is accumulating in the accumulator. When it has been determined that liquid refrigerant is accumulating in the accumulator, liquid refrigerant accumulation control is performed to eliminate liquid refrigerant accumulation in the accumulator.

Abstract: A system, compressor, and method that cools an electronics module with a low-pressure refrigerant. The system, compressor, and method utilize a temperature sensor that detects a temperature of the low pressure refrigerant and communicates with the electronics module. Based on the temperature detected by the temperature sensor, the electronics module controls a liquid dry out point of the refrigerant that is used to cool the electronics module.

Abstract: Heating equipment, including a first heat exchanger, a compressor, a second heat exchanger, and a first expansion valve that decompresses a refrigerant flowing from the second heat exchanger to the first heat exchanger, are connected so as to circulate the refrigerant. A third heat exchanger provides heat of the refrigerant flowing from the second heat exchanger to the first heat exchanger to the refrigerant flowing from the first heat exchanger toward the compressor. An injection circuit merges part of the refrigerant flowing from the second heat exchanger to the first heat exchanger with the refrigerant that is sucked by the compressor. An injection expansion valve is installed in the injection circuit and decompresses the refrigerant flowing in the injection circuit. A fourth heat exchanger is installed in the injection circuit to supply heat of the refrigerant flowing from the second heat exchanger toward the first heat exchanger to the refrigerant flowing in the injection circuit.

Abstract: A method of reducing a cyclical loss coefficient of an HVAC system efficiency rating of an HVAC system includes operating the HVAC system using a recorded electronic expansion valve position of an electronic expansion valve of the HVAC system, discontinuing operation of the HVAC system, and resuming operation of the HVAC system using an electronic expansion valve position that allows greater refrigerant mass flow through the expansion valve as compared to the recorded electronic expansion valve position.

Abstract: A cooling system has a tandem compressor, a condenser, an electronic expansion valve and an evaporator arranged in a direct expansion cooling circuit. The tandem compressor includes a variable capacity compressor and a fixed capacity compressor. A controller controls the electronic expansion valve and selects which of a plurality of superheat control modes to use in operating the electronic expansion valve based on control parameters and a current operating status of each of the variable capacity compressor and fixed capacity compressor of the tandem compressor.

Abstract: A heat exchange assembly and apparatus and method employing the heat exchange assembly are provided. The heat exchange assembly includes a coolant-to-refrigerant heat exchanger and a heater. The heat exchanger includes a coolant inlet and a coolant outlet for passing a coolant through the heat exchanger, and a refrigerant inlet and a refrigerant outlet for separately passing a refrigerant through the heat exchanger. The heat exchanger cools coolant passing through the heat exchanger by dissipating heat from coolant passing through the heat exchanger to refrigerant passing through the heat exchanger. The heater is integrated with the heat exchanger and applies an auxiliary heat load to refrigerant passing through the heat exchanger to facilitate ensuring that refrigerant passing through the heat exchanger absorbs at least a specified minimum heat load, for example, to ensure that refrigerant egressing from the refrigerant outlet of the heat exchanger is superheated vapor refrigerant.

Abstract: A system, compressor, and method that cools an electronics module with a low-pressure refrigerant. The system, compressor, and method utilize a temperature sensor that detects a temperature of the low pressure refrigerant and communicates with the electronics module. Based on the temperature detected by the temperature sensor, the electronics module controls a liquid dry out point of the refrigerant that is used to cool the electronics module.

Abstract: A heat pump system includes a heat source unit, a first usage unit, and a second usage unit. The heat source unit has a heat-source-side compressor, a heat-source-side heat exchanger, a heat-source-side blower and a heat-source-side switching mechanism. The first usage unit has at least a radiation amount adjusting element and a first usage-side flow rate adjustment valve. The second usage unit has at least a second usage-side flow rate adjustment valve. In a case in which the second usage unit performs an air-cooling operation and the first usage unit performs an aqueous medium heating operation, the amount of radiation adjusted by the radiation amount adjusting element or operating capacity of the heat-source-side blower is controlled in accordance with a state of the first usage-side flow rate adjustment valve and the second usage-side flow rate adjustment valve.

Abstract: A method for controlling a refrigerant distribution in a vapour compression system, such as a refrigeration system, e.g. an air condition system, comprising at least two evaporators. The refrigerant distribution determines the distribution of the available amount of refrigerant among the evaporators. While monitoring a superheat, SH, at a common outlet for the evaporators, the distribution of refrigerant is modified in such a manner that a mass flow of refrigerant to a first evaporator is altered in a controlled manner. The impact on the monitored SH is then observed, and this is used for deriving information relating to the behaviour of the first evaporator, in the form of a control parameter. This is repeated for each evaporator, and the refrigerant distribution is adjusted on the basis of the control parameters. The impact may be in the form of a significant change in SH.

Abstract: A method for controlling operation of a vapour compression system (1), and a vapour compression system (1) are disclosed. The vapour compression system (1) comprises a compressor (2), a heat rejecting heat exchanger (3), a controllable valve (4), a receiver (5), at least one expansion device and at least one evaporator arranged along a refrigerant path having refrigerant flowing therein. The vapour compression system (1) is capable of being operated in a subcritical control regime as well as in a supercritical control regime.

Abstract: A thermal expansion valve comprises a valve body and a valve core member. The valve body is provided with a first connecting chamber, a lower cavity with a transmission member built in, and a first sealing member for separating the first connecting chamber and the lower cavity. A fifth pressure-bearing surface and a sixth pressure-bearing surface, pressed by a cold medium in the first connecting chamber in opposite directions, are disposed on a side wall of the valve core member. The first sealing member comprises a first flexible sealing element, disposed between the transmission member and an upper end portion of the valve core member and having a first edge portion connected to the valve body in a sealing manner.

Abstract: A climate control system is provided and may include a compressor, a first heat exchanger in fluid communication with the compressor, a second heat exchanger in fluid communication with the compressor and the first heat exchanger, and a third heat exchanger disposed between the first heat exchanger and the second heat exchanger and including an inlet and an outlet. A conduit may be fluidly coupled to the third heat exchanger and the compressor and may selectively supply fluid to the compressor. A valve may control a volume of fluid supplied to the compressor via the conduit. A controller may control the valve based on a temperature difference between the outlet of the third heat exchanger and the inlet of the third heat exchanger.

Abstract: A valve assembly (1) comprising an inlet opening, a distributor and an outlet part comprising at least two outlet openings. The distributor comprises an inlet part (5) fluidly connected to the inlet opening, and is arranged to distribute fluid medium received from the inlet opening to at least two parallel flow paths, preferably of a heat exchanger (3). The valve assembly (1) further comprises a first valve part and a second valve part arranged movable relative to each other in such a manner that the mutual position of the valve parts determines the fluid flow from the inlet opening to each of the outlet openings of the outlet part. Finally, the valve assembly (1) comprises a header (2) forming an integral part of the valve assembly (1).

Abstract: A refrigeration system with a multi-function heat exchanger has a first heat exchanger with an internal partition defining a condenser, a subcooler and an evaporator. An expansion device is located external of the heat exchanger and receives condensed refrigerant from the subcooler and provides expanded refrigerant to the evaporator. A compressor circulates the refrigerant through the condenser, the subcooler, and the evaporator. A secondary coolant circulates through the subcooler, the evaporator and the loads. A control system receives refrigerant temperature and pressure signals, and provides a control signal to the expansion device to maintain a temperature of the refrigerant within a predetermined range. A second heat exchanger cools a condensing fluid circulating through the condenser to condense the refrigerant.