Abstract: To accommodate a transcritical vapor compression system with an operating envelope which covers a large range of heat source temperatures, a high side pressure is maintained at a level determined not only by operating conditions at the condenser but also at the evaporator. A control is provided to vary the expansion device in response to various combinations of refrigerant conditions sensed at both the condenser and the evaporator in order to maintain a desired high side pressure.

Abstract: A turbo compressor includes an impeller fixed to one end portion of a rotation shaft by a predetermined fastening member, and a regulating portion which is used to regulate rotation of the rotation shaft during fastening of the fastening member and is provided in the other end portion of the rotation shaft. The regulating portion is formed as a recessed portion recessed from an end surface of the other end portion of the rotation shaft.

Abstract: Provided are a distributor having a distribution tube having an inner surface formed as a curved surface, a plurality of distribution holes which are formed in a lower semicircular region of the distribution tube with respect to a horizontal line of the distribution tube and are arranged to be symmetrical about a vertical line of the distribution tube and a connection hole provided in the distribution tube so that the distribution tube is connected to a connection tube, an evaporator and a refrigerating machine with the distributor. A perforated plate may be fixed to an inside of the distribution tube so as to block a flow path of a cooling medium.

Abstract: A refrigeration device comprising a refrigeration circuit that contains an evaporator, a condenser and a compressor, in addition to electronic components for operating the refrigeration device. According to the invention, all the electronic components are combined in an electronic unit.

Abstract: A turbo compressor according to the present invention includes: a flow rate adjustment section which adjusts the flow rate of gas that is introduced into an impeller; a driving section which drives the flow rate adjustment section; and a power transmission shaft which transmits power that is generated by the driving section to the flow rate adjustment section, wherein the turbo compressor further includes a frame which is provided to surround the flow rate adjustment section, and the frame has an intake port for gas that is introduced into the impeller and a hole portion in which the power transmission shaft is provided passing through.

Abstract: Compositions, methods and systems which comprise or utilize a multi-component mixture comprising: (a) from about 10% to about 35% by weight of HFC-32; (b) from about 10% to about 35% by weight of HFC-125; (c) from about 20% to about 50% by weight of HFO-1234ze, HFO-1234yf and combinations of these; (d) from about 15% to about 35% by weight of HFC-134a; and optionally (e) up to about 10% by weight of CF3I and up to about 5% by weight of HFCO-1233ze, with the weight percent being based on the total of the components (a)-(e) in the composition

Abstract: A tubular heat exchanger is provided for a motor vehicle air conditioner with an inner tube through which a fluid or gas can flow and an outer tube radially enclosing the inner tube subject to the formation of an intermediate space through which a flow can flow. The inner tube and the outer tube are at least radially fixed to each other by means of a number of stampings radially worked into the outer tube.

Abstract: Provided is a turbo compressor configured to compress a gas in cooperation with a rotatable impeller and a diffuser formed around the impeller and to discharge the compressed gas to the outside thereof through a scroll chamber communicating with the diffuser, the turbo compressor including: an impeller casing which is formed by integrally molding a body portion surrounding the impeller and forming a part of a the scroll chamber and a partition plate provided at the rear surface side of the impeller; and a shroud cover which is provided at the inside of the body portion to surround the impeller and forming the scroll chamber in cooperation with the body portion.

Abstract: An air conditioning device is provided. The air conditioning device includes a distribution device that distributes refrigerant from an outdoor unit to a plurality of indoor units, and that receives refrigerant from the plurality of indoor units and supplies the received refrigerant to the outdoor unit. The distribution device may reduce the length of pipes used to connect the plurality of indoor units and the outdoor unit and facilitate installation of the outdoor unit.

Abstract: Phase correction unit (25) for outputting a commutation signal for switching a winding that allows a current to flow to brushless DC motor (4) and drive unit (16) for outputting a drive signal indicating supplying timing of electric power supplied to brushless DC motor (4) by inverter (3) based on the commutation signal output from phase correction unit (25) are provided so as to maintain a predetermined relation between a phase of a current flowing to a predetermined winding of brushless DC motor (4) and a phase of a voltage. Since brushless DC motor (4) is driven by a signal for holding the predetermined relation between the phase of the current and the phase of the voltage, the stability of drive under high-speed and high-load conditions is enhanced and a drive range is extended.

Abstract: Disclosed are a compressor and a refrigerating machine having the same, wherein a bearing member (ball bearing) is installed between both thrust bearing surfaces and an elastic member is disposed between the bearing member and at least one of the thrust bearing surfaces so as to allow a rolling contact between the ball bearing and the thrust bearing surface or a washer, thereby reducing a frictional loss at the thrust bearing surface and enhancing the performance of the compressor.

Abstract: A relationship is developed between a discharge condition of a refrigerant leaving a compressor, and the suction superheat or refrigerant quality. By relying upon measurement and control of the discharge condition, the present invention is able to achieve very low suction superheat values. Controlling the operation to very low suction superheat values results in augmented refrigerant system performance.

Abstract: Modernized refrigeration cycle includes two consecutive expansions with two expansion devices and two condensers, wherein the first condenser liquefies refrigerant after compressor and the second condenser liquefies refrigerant after the first expansion device. The cooling medium for the second condenser is either air to be conditioned in the refrigeration system or another available medium. Invention presents sealed systems of air conditioners, dehumidifiers and heat pumps operating per aforementioned refrigeration cycle that allows enhanced dehumidification with efficiency improvement in cooling mode and heating capacity and efficiency increase in heating mode.

Abstract: A waste water heat transfer system for actively transferring heat from waste water to incoming potable water to assist in heating the potable water. The system generally includes a holding tank for receiving wastewater, a heat transfer unit having a refrigeration system and a fluidly connected coaxial heat exchanger, wherein the coaxial heat exchanger receives warmed refrigerant that absorbs heat from the wastewater while travelling through the refrigeration system, a potable water inlet in fluid communication with the coaxial heat exchanger to circulate the potable water within the coaxial heat exchanger and absorb heat from the warmed refrigerant, a buffer tank to receive the warmed potable water from the coaxial heat exchanger, and a hot water heater to receive the warmed potable water from the buffer tank as needed. A controller circuit is used to activate and deactivate the heat transfer unit according to parameters, such as water temperature.

Abstract: A heat exchanger includes tubes and an inlet manifold to direct a first fluid into the tubes at a third direction. Heat is exchanged between the first fluid and a second fluid in the tubes. The heat exchanger also includes a distributor tube located within the inlet manifold. The distributor tube includes a short tube including a plurality of first orifices that direct the first fluid into the inlet manifold at a first direction, and a long tube including a plurality of second orifices that direct the first fluid into the inlet manifold at a second direction.

Abstract: A heat transfer system includes a working fluid and an electrochemical compressor. The working fluid is made up of a polar solvent that primarily acts as a condensable refrigerant and hydrogen that primarily acts as an electrochemically-active component. The electrochemical compressor includes an inlet fluidly coupled to an evaporator to receive the working fluid; an outlet fluidly coupled to a condenser; and one or more electrochemical cells electrically connected to each other through a power supply. Each electrochemical cell includes a gas pervious anode, a gas pervious cathode, and an electrolytic membrane disposed between and in intimate electrical contact with the cathode and the anode to pass the working fluid.

Abstract: Disclosed is a gravity flooded evaporator for use with commercial or industrial heating, air conditioning, and ventilation systems, and which does not require integration or use of a conventional, separately field-piped, surge vessel and associated subsystem.

Abstract: Disclosed herein is a water-source heat-pump type air conditioner in which a receiver is connected to a super-cooler or economizer, and a control method of the air conditioner to reduce the quantity of liquid refrigerant collected in the receiver during a cooling/heating overload operation. When a cooling/heating overload operation occurs, an electric expansion valve associated with the super-cooler or the economizer is opened by a predetermined opening degree, to bypass high-pressure liquid refrigerant collected in the receiver, thereby preventing a rapid pressure increase due to a great quantity of liquid refrigerant collected in the receiver.

Abstract: A compressor has a housing. A crank is carried by the housing for rotation about a crank axis. A cylinder is defined within the housing and has a proximal portion and a distal portion. The distal portion is smaller in transverse cross-sectional area than is the proximal portion. A piston is held within the housing for reciprocal movement at least partially within the cylinder. The piston also has a distal portion smaller in transverse cross-sectional area than a proximal portion. A connecting rod is pivotally coupled to the crank for relative rotation about a proximal axis and to the piston for relative rotation about a distal axis. A first compression chamber exists in the cylinder distal portion beyond the end of the piston. A second compression chamber exists in the cylinder proximal portion beyond a piston shoulder. The first and second compression chambers are non-series and non-parallel.

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.

Abstract: A heat pump apparatus that is capable of suppressing an increase in the installation area therefor and volume thereof is provided. A heat pump apparatus includes a compressor that compresses refrigerant, a condenser that liquefies the compressed refrigerant, and an evaporator that evaporates the liquefied refrigerant, wherein the condenser and the evaporator are plate-type heat exchangers formed in rectangular cuboid shapes, and the condenser, which is a plate-type heat exchanger, and the evaporator, which is a plate-type heat exchanger, are disposed next each other.

Abstract: A cooling system with a compression cooling cycle for a working fluid that passes an expendable fluid through a warm side heat exchanger for the cooling system to cause the expendable fluid to vaporise and thus absorb heat from the working fluid by way of latent heat or enthalpy of vaporisation and then running the vaporised expendable through a turbine that drives a compressor for the cooling system.

Abstract: A single medium voltage starter box is mounted on a chiller unit with the other components of the chiller system. The starter box can be positioned on the chiller system unit to permit the starter box to be close coupled to the motor, and specifically to the main motor lead exit hub without the need for any power conduit connections between the starter box and the motor. In addition, the starter box also does not require any control interface and receives controls from a control panel. A short conduit connection between the control panel and the starter box is used to provide the necessary connections between the control panel and the starter box.

Abstract: A heat transfer composition comprising trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)), difluoromethane (R-32) and 1,1-difluoroethane (R-152a).

Abstract: A leakage diagnosis apparatus for diagnosing presence/absence of refrigerant leakage in a refrigerant circuit performing a refrigeration cycle, wherein refrigerant leakage diagnosis using the amount of refrigerant exergy loss in a circuit component of the refrigerant circuit is realized. In a leakage diagnosis apparatus, an exergy calculation section calculates a leakage index value which changes in accordance with the amount of refrigerant leaking out of a refrigerant circuit based on the amount of refrigerant exergy loss in the circuit component. Then, a leakage determination section determines whether there is refrigerant leakage in the refrigerant circuit based on the leakage index value calculated by the exergy calculation section.

Abstract: A vertical discharge condenser includes a generally cylindrical heat exchanger having a vertical interruption between a first and a second end of the heat exchanger, a panel enclosing the vertical interruption in the heat exchanger to form an uninterrupted generally cylindrical enclosure, a generally circular fan grille enclosing a top of the cylindrical enclosure, and a generally circular base pan enclosing a bottom of the cylindrical enclosure.

Abstract: A refrigerant vapor compression system includes a flash tank disposed in the refrigerant circuit intermediate a refrigerant heat rejection heat exchanger and a refrigerant heat absorption heat exchanger. The flash tank has a shell defining an interior volume having an upper chamber, a lower chamber and a middle chamber. A first fluid passage establishes fluid communication between the middle chamber and the upper chamber and a second fluid passage establishing fluid communication between the middle chamber and the lower chamber. An inlet port opens to the middle chamber. A first outlet port opens to the upper chamber and a second outlet port opens to the lower chamber.

Abstract: A device for cooling a heat source of a motor vehicle is provided that includes a cooling body which has a plurality of feed flow channels and a plurality of return flow channels. At least a multiplicity of the feed flow channels and return flow channels are arranged adjacent to one another in an alternating fashion in the cooling body.

Abstract: A splitter system is disclosed that produces a product stream from a mixed stream of two materials with similar boiling points. A multi-stage heat pump compressor is used in combination with a bottoms reboiler and an intermediate reboiler resulting in reduced utility consumption. The appropriately placed intermediate reboiler enables use of a lower temperature heat source relative to the bottoms reboiler heat source. As a result, a lower pressure overhead vapor stream can be used to deliver heat to both the intermediate and bottoms reboilers, thereby conserving energy. The first stage of the multi-stage heat pump compressor delivers pressurized overhead vapor to the intermediate reboiler and the second stage provides pressurized overhead vapor to the bottoms reboiler. The disclosed design and method lessens the heat pump compressor power consumption and trim condenser duty for a propylene/propane splitter system by over 20%.

Abstract: Disclosed herein is an apparatus, which circulates a refrigerant in a computer body to produce cooling air and introduces the cooling air into the computer body, thus cooling the computer body. The apparatus includes an opening hole formed in either of side covers closing both side surfaces of the computer body to permit inflow of external air. A cooling hole is formed in the side cover in such a way as to be spaced apart from the opening hole. A cooling means is provided inside the side cover of the computer body, produces cooling air and cools a refrigerant by supplying, circulating and collecting the refrigerant stored in a refrigerant tank, thus cooling the interior of the computer body with the cooling air.

Abstract: In a heat pump apparatus of the invention, a refrigerant is circulated through a compressor 31, a radiator 32, a first throttle apparatus 33, a heat exchanger 34, a second throttle apparatus 35 and an evaporator 36 in this order. The heat exchanger 34 can be utilized as both a radiator and an evaporator by operating the first throttle apparatus 33 and the second throttle apparatus 35. Therefore, even if the outside air temperature is high, discharge pressure and suction pressure of the compressor do not rise, the heat pump apparatus can be operated in a stable refrigeration cycle, and energy can be saved.

Abstract: A coaxial economizer for use in a chiller system comprising an inner housing and an outer housing having a common longitudinal axis. The outer housing has an inlet for receiving a fluid from a upstream compressor stage of a multistage compressor and an outlet for conveying a fluid to a downstream compressor stage of a multistage compressor. A flow chamber forms a fluid flow path about the inner housing. A flash chamber is coterminous with the flow chamber and flashes fluid in a liquid state to a gas state. A flow passage between said flash chamber and the flow chamber for conveying a flashed gas from the flash chamber to the flow chamber; wherein the flashed gas conveyed from the flash chamber and the fluid received from the inlet of the outer housing mix along the fluid flow path toward the outlet of the outer housing.

Abstract: A heat transfer composition comprising trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)), carbon dioxide (R-744) and a third component selected from difluoromethane (R-32), 1,1-difluoroethane (R-152a), fluoroethane (R-161), 1,1,1,2-tetrafluoroethane (R-134a), propylene, propane and mixtures thereof.

Abstract: A driving apparatus for an air conditioning system has a first and a second electrical actuators for driving air control doors, wherein the first and second actuators are accommodated in a common housing so that they are modularized to each other. The driving apparatus further has a third electrical actuator for driving another air control door, wherein the third actuator is provided at a position separated from the housing. Driving circuits for the first to third actuators are formed on a single IC chip or on a single electrical circuit board. The driving circuits formed on the IC chip or the electrical circuit board is accommodated in the housing for the first and second actuators.

Abstract: An object of the present invention is to keep an appropriate high pressure side pressure in a refrigerant circuit while reducing noises of an operation of a blower in a refrigerating apparatus which obtains a critical pressure on a high pressure side. The refrigerating apparatus in which the refrigerant circuit is constituted of a compressor, a gas cooler, reducing means and an evaporator to obtain a supercritical pressure on the high pressure side comprises a blower which air-cools the gas cooler and a control device which controls this blower. This control device controls a revolution speed of the blower based on an outdoor temperature and an evaporation temperature of a refrigerant in the evaporator.

Abstract: A regulator of refrigerant for a refrigeration circuit with flooded evaporator. The refrigerant can be distributed to many separate evaporator channels. The flow of refrigerant can be changed so that the evaporator and condenser change functions. This provides the opportunity for a fast defrosting of the evaporator or the evaporator can alternately be applied for cooling and heating. The regulator functions independently of the gravitational field and therefore it can be applied for air-conditioning systems in aeroplane and space crafts. The regulator is without movable parts. It has two throttling steps, e.g. two capillary tubes separated by a suction-gas heat exchanger. It requires neither adjustment nor maintenance and therefore it can be placed at inaccessible places or it can be embedded completely in insulation foam.

Abstract: In one embodiment, the invention provides a refrigeration system having a compressor configured to compress a refrigerant gas and a condenser fluidly coupled to the compressor to receive compressed refrigerant gas from the compressor, the condenser configured to condense the refrigerant gas. In addition the refrigeration system includes a heat exchanger having a first section fluidly coupled to the compressor, and a second section fluidly coupled between the condenser and the compressor, wherein the first section receives compressed refrigerant gas from the compressor, and wherein the second section receives condensed refrigerant from the condenser, evaporates the refrigerant, and delivers the evaporated refrigerant to the compressor.

Abstract: Disclosed herein is a refrigerator. In a refrigeration cycle including a channel switching valve to selectively supply a refrigerant to a first evaporator side and/or a second evaporator side and hot pipes, a hot pipe on a freezing chamber side and a hot pipe on a refrigerating chamber are disposed upstream and downstream of the channel switching valve, respectively to reduce unbalance in amounts of the refrigerant and in the amounts of generated heat.

Abstract: The invention relates to an air conditioning device (1) comprising elements (15,16,13,14,19,22,P1,P2;17) of an A/C loop (4) inside which circulates a cooling fluid FR, of a primary circuit (5) inside which circulates a coolant fluid FC and of a secondary circuit (6) inside which circulates a coolant liquid LC. The air conditioning device (1) comprises a support (100) on which the elements (15,16,13,14,19,22,P1,P2;17) are fixed.

Abstract: The embodiment relates to a refrigerator. In the refrigerator, a freezing compartment is selectively partitioned into a plurality of spaces and some of the plurality of spaces can be used as a convertible compartment that can be converted into the refrigerating compartment and the freezing compartment. In addition, the refrigerator has a structure that an operation unit is provided at a door that opens and closes the convertible compartment and a cable that extends from a main body to the operation unit is clearly processed.

Abstract: An air conditioning system is mainly provided with comprises an evaporator, a compressor, a condenser, a valve and an energy recovery device. The compressor is fluidly connected to the evaporator to compress low-pressure refrigerant exiting the evaporator to high-pressure refrigerant. The condenser is fluidly connected to the compressor to receive the high pressure refrigerant and dissipate heat therefrom. The valve controls flow of high pressure refrigerant exiting the condenser. The energy recovery device includes a movable expander having an inlet and an outlet. The inlet is fluidly connected to the valve to receive the high pressure refrigerant. The movable expander phase changes the refrigerant from high pressure refrigerant at the inlet to low pressure refrigerant at the outlet. The energy recovery device extracts work from movement of the movable expander due to the phase change of the refrigerant from the high pressure refrigerant to the low pressure refrigerant.

Abstract: A heat exchanger includes a shell communicating with a first fluid inlet pipe and a first fluid outlet pipe, end caps coupled to ends of the shell to communicate with a second fluid inlet pipe and a second fluid outlet pipe, a plurality of tubes disposed in the shell to constitute a channel through which a second fluid flows, an end baffle located at ends of the tubes to prevent mixing of a first fluid and the second fluid, and a first plate to fill gaps between the tubes and the end baffle.

Abstract: A refrigerator in which an evaporator is separately installed in each of a freezing chamber and a refrigerating chamber such that operations of the freezing chamber and the refrigerating chamber are independently controlled, and a method of controlling an operation thereof. An operation of the freezing chamber is performed first when the refrigerator starts to be operated in a parallel cycle to convert a flow of a refrigerant such that operations of the freezing chamber and the refrigerating chamber are independently performed using a 3-way valve, thereby achieving energy savings. Further, a check valve to prevent the refrigerant from flowing to a freezing chamber evaporator is omitted, thereby achieving production cost reduction.

Abstract: A method involves inspecting/testing a refrigeration system. One or more conduits or other components cooperate with the compressor, heat rejection heat exchanger, expansion device, and heat absorption heat exchanger to define a refrigerant flowpath. The inspecting/testing method comprises placing a plurality of collars over respective joints along the refrigerant flowpath. The collars each define a space that may be exposed to one or more sensors. Based upon input from the sensors, the presence or absence of leaks at the joints is determined.

Abstract: An optimizer for a single staged refrigeration system comprising a speed modulation device, controller, and supply air temperature sensor. The optimizer is intended for modulating the speed of the indoor fan and compressor in existing or new refrigeration systems in settings including but not limited to residential houses/buildings, residential heat pump systems, commercial heat pumps systems, water source heat pumps, and roof top units. The optimizer solves humidity and noise problems in existing systems, reduces peak demand, increases energy efficiency, reduces energy consumption rates, and minimizes compressor failure rates and O&M costs.

Abstract: A water circulation apparatus performs a variety of heat exchange operations for various refrigerants. The apparatus may be applied for a first refrigerant system having a first compressor and first heat-exchanger and a second refrigerant system having a second compressor. An intermediate heat-exchanger performs heat-exchange operations between first and second refrigerants flowing in respective ones of the systems. A water circulator is then used to circulate water which is heat-exchanged with the second refrigerant while the water is circulated. The apparatus performs these functions for operating modes which include a heating mode and a cooling mode. Defrosting operations are also performed for one or more of the heat exchangers.

Abstract: Disclosed is a variable capacity type rotary compressor (1), a cooling apparatus having the same, and an operation method thereof, wherein in the variable capacity type rotary compressor (1) and the cooling apparatus having the same, a discharge pressure to be supplied to a rear side of a second vane (430) disposed in the compressor (1) is supplied after being higher than a reference pressure, so that the compressor (1) can be switched from a saving mode into a power mode, whereby the second vane (430) can be press-contacted with a second rolling piston (420) with fast and accurately moving without vibration, resulting in preventing beforehand noise occurrence or efficiency degradation due to the vibration of the second vane (430) when the compressor (1) or the cooling apparatus having the compressor (1) is operated in the power mode.

Abstract: A reciprocating piston compressor for use in a refrigerant compression circuit comprises first and second intake manifolds, first and second reciprocating piston compression units, an outlet manifold and a first pulsing valve. The intake manifolds segregate inlet flow into the compressor. The first and second reciprocating piston compression units receive flow from the first and second intake manifolds, respectively. The outlet manifold collects and distributes compressed refrigerant from the compression units. The first pulsing valve is mounted externally of the first intake manifold to regulate refrigerant flow into the first intake manifold. In another embodiment, a second valve is mounted externally of the second intake manifold to regulate flow into the second intake manifold, and the first and second valves are operated by a controller. The controller activates the first valve with variable width pulses having intervals less than an operating inertia of the refrigerant compression circuit.

Abstract: A tubular heat exchanger is provided for a motor vehicle air conditioner with an inner tube through which a fluid or gas can flow and an outer tube radially enclosing the inner tube subject to the formation of an intermediate space through which a flow can flow. The inner tube in this case includes, but is not limited to a quantity of stampings arranged spaced from one another and with their longitudinal extension at least partially extending in axial direction of the inner tube.

Abstract: A mounting bracket is configured to isolate a drive module of a compression type chiller assembly from vibrations. The mounting bracket includes a bracket plate configured to be attached to a chiller assembly component adjacent to the drive module, a mounting plate transversely attached to the bracket plate and configured to be connected to a rail extending along a bottom side of the drive module, and an isolator pad arranged generally over the mounting plate such that the pad is configured to be interposed between the mounting plate and the rail of the drive module.