Abstract: An improved air-source heat pump for residential and commercial use, employing two closed refrigerant systems having different refrigerants in cascade relationship to each other to address efficiency and space concerns, with the first closed refrigerant system partitionable into a first sub-system and a second sub-system, with the first sub-system working in conjunction with the second closed refrigerant system in heating mode and the second sub-system working independently in cooling mode.

Abstract: A space-saving, high-density modular data pod system and an energy-efficient cooling system for cooling electronic equipment and method of cooling are disclosed. The cooling system includes a free-cooling system cooling a first fluid in thermal communication with the electronic equipment using atmospheric air and a mechanical sub-cooling system coupled to the free-cooling system. The mechanical system cools a second fluid flowing in the free-cooling system as a function of an amount by which the free-cooling system has exceeded its maximum cooling capacity. The method of cooling includes using a first fluid, enabling heat transfer from the first fluid to a second fluid that has been cooled using atmospheric air, and mechanically cooling the second fluid to the extent that free cooling the first fluid is insufficient to cool the first fluid. The cooling system operates by the wet bulb temperature exceeding a first predetermined wet bulb temperature.

Abstract: A distributed refrigeration appliance system in a residential kitchen and other locations in a dwelling including multiple separate refrigeration appliance modules, a central cooling system and a cooling circuit. The system can also include one or more satellite stations having a heat exchanger and arranged for supplying chilled air to one or more refrigeration appliance modules. One or more refrigeration appliance modules can include a thermal cascade cooling device to cool the module to lower temperatures than the cooling circuit can attain. One or more refrigeration appliance modules can be refrigeration/storage modules that can provide refrigerated, unconditioned or heated storage space. The central cooling system can be a vapor compression system having a refrigerant circuit connecting the modules. Alternately, the central cooling system can cool a secondary cooling medium circuit.

Abstract: The present invention relates to a heat exchanger comprising at least one first loop adapted to trap energy from a source. The first loop contains a first refrigerant adapted to collect energy from a source. The invention also comprises at least one second loop with a second refrigerant adapted to interact with the first refrigerant and to transfer to a user a maximum quantity of the energy trapped by the first loop in the most efficient manner. The transfer of the trapped energy takes place in a transfer unit placed in the second loop. The transfer unit comprises an outer cylinder with an inlet and an outlet adapted to circulate the first refrigerant. An inner coil placed within the outer cylinder to contain the second refrigerant. The inner coil is provided with an inlet and outlet adapted to facilitate circulation of the second refrigerant.

Abstract: A fan driven evaporator is one component for use in refrigeration applications such as an evaporative cooler which employs refrigeration. In one embodiment, a frosting evaporative cooler utilizes an evaporator in the shape of a squirrel cage blower that utilizes alternating and opposing flows of refrigerant in refrigerant tubing to allow for the dehumidifying and cooling of humid air without freezing over and losing air flow. A fan for use in coolers in humid conditions comprises a motor driving a centrifugal blower. At least two cooling coils that are parallel have cooling fins separating all the coils. The coils surround the blower wheel thereby matching the shape of the outside of the blower housing.

Abstract: An air conditioning system for communication equipment. An indoor module has expansion valves installed on refrigerant pipes, brine coolers each having heat exchange tubes to which the refrigerant pipe extending from each expansion valve and a separate brine pipe are connected, compressors for compressing refrigerant, an indoor heat exchanger having a heat exchange tube to which the brine pipe extending from the brine coolers is connected, and an indoor blower. An outdoor module has circulation pumps connected in parallel to the brine pipe extending from the indoor heat exchanger, outdoor heat exchangers connected in series with each other while facing each other and each having a heat exchange tube to which the brine pipe extending from the circulation pumps is connected, condensers facing each other and having tubes to which the refrigerant pipes extending from the compressors are connected in parallel, and an outdoor blower.

Abstract: The invention relates to the creation of hybrid refrigeration systems. In one embodiment a low pressure booster circuit is linked to an absorption plant to provide cooling at lower temperatures that can be achieved by the absorption plant alone. The combined systems are efficient compared to vapour compression systems, especially when “waste” heat from other processes is used to drive the absorption part of the circuit. The absorption plant can be provided with heat either by direct firing of a fuel, by waste heat from a combined heat and power (CHP) prime mover (such as a gas engine or gas turbine for example), or by any suitable source of waste heat from another process.

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: There is disclosed a refrigerating apparatus which can more efficiently cool the inside of a chamber to an ultralow temperature. In a refrigerating apparatus R1 which condenses a refrigerant discharged from a compressor 14, reduces a pressure of the refrigerant by a capillary tube 18 and evaporates the refrigerant by an evaporator 13 to exert a cooling function, the capillary tube 18 is passed through a suction piping line 32 through which the refrigerant returning from the evaporator 13 to the compressor 14 flows, to constitute a double tube structure. Furthermore, the suction piping line 32 (a piping line 32A) formed in the double tube structure by passing the capillary tube 18 therethrough is surrounded with an insulating material 35.

Abstract: A refrigerant system has a refrigerant circuit comprising a compressor for compressing a refrigerant and delivering it downstream to a condenser. A bypass line is provided around the condenser for selectively allowing at least a portion of refrigerant to bypass the condenser. Valves are provided on a line leading to the condenser and on the bypass line to individually control the flow of refrigerant. An expansion device is located downstream of the condenser, and an evaporator is located downstream of the expansion device. A reheat cycle is incorporated into the system. The reheat cycle includes a valve for selectively delivering at least a portion of refrigerant through a reheat heat exchanger, which is positioned in the path of air downstream of the evaporator. A control is provided for the system to achieve a desired level of dehumidification and temperature control to air being delivered into the environment to be conditioned.

Abstract: The air exchanger comprises at least one tubular circuit for evaporating a refrigerant and thermally conducting fins (40) fastened to the tubular evaporation circuit and at least one tubular circuit (35) for condensing a refrigerant, which is connected via thermally conducting fins (40) to the evaporation circuit.

Abstract: A refrigeration system includes a medium temperature subsystem circulating a coolant in a closed loop between at least one medium temperature chiller and at least one medium temperature load and at least one cascade heat exchanger, and a low temperature subsystem circulating a coolant in a closed loop between at least one low temperature chiller and at least one low temperature load. A cooling circuit is provided for circulating a coolant and includes a first pump and a second pump and a fluid cooler and a valve, and interfaces with the medium temperature chiller and the low temperature chiller. The valve is movable to a closed position to define a first flow path and a second flow path, where the first flow path includes the first pump and the medium temperature chiller and fluid cooler, and the second flow path including the second pump and the low temperature chiller and the cascade heat exchanger.

Abstract: An HVAC system having a main circuit and a subcooler circuit. The main circuit includes a main circuit evaporator, a main circuit expansion device, a main circuit condenser and a main circuit compressor connected in a closed refrigerant loop. The subcooler circuit includes a subcooler evaporator, a subcooler expansion device, a subcooler condenser and a subcooler compressor connected in a closed refrigerant loop. The subcooler evaporator is arranged and disposed to exchange heat between liquid refrigerant in the main circuit and the refrigerant in the subcooler circuit to cool the liquid refrigerant in the main circuit prior to entering the main circuit evaporator. The operation of the subcooler circuit provides an increased cooling capacity per unit of a mass flow of cooling fluid through the main circuit condenser and subcooler condenser for the HVAC system with a predetermined design efficiency.

Abstract: A refrigerating apparatus includes first and second refrigerant circuits including respective first and second compressors, condensers, pressure reducers, and evaporators, connected circularly with first and second refrigerant pipes, respectively, refrigerants discharged from the first and second compressors being respectively condensed at the first and second condensers and thereafter respectively evaporated at the first and second evaporators to acquire a cooling effect; a temperature sensor that detects a temperature of an internal portion of a cold storage cabinet, the first and second evaporators being disposed to cool the internal portion simultaneously; and a first control device that controls the first and second compressors such that both of them are operated each time a temperature detected by the temperature sensor reaches a first temperature, and the first and second compressors are alternately operated each time a temperature detected by the temperature sensor reaches a second temperature lower t

Abstract: Disclosed are a method and device for a refrigerant-based thermal storage system wherein a condensing unit and an ice-tank heat exchanger can be isolated through a second heat exchanger. The disclosed embodiments provide a refrigerant-based ice storage system with increased reliability, lower cost components, and reduced power consumption compared to a single phase system such as a glycol system.

Abstract: A cooling system (10) comprises a first (40) and a second (50) cold storage tank, a first refrigerator (41) cooling water in the first cold storage tank (40), a first thermal load (92) disposed in a first circulating passage (43) extending from the lower to the upper part of the first cold storage (40), a second thermal load (93) warmer than the first thermal load (92) disposed in a second circulating passage (44a) also extending from the lower to the upper part of the first cold storage tank, a second cold storage tank (50) disposed in the second circulating passage, a second refrigerator (51) cooling water fed from the upper part of the second cold storage (50), wherein a cooling output temperature of the second refrigerator (51) is set to be higher than that of the first refrigerator (41).

Abstract: The disclosure provides an improved cooling system and associated cabinet for electronic equipment, and optionally, a backup ventilation system for cooling related failures. Generally, the disclosure includes a high capacity closed loop refrigeration system in a modified cabinet, while accommodating standard sized computer equipment. Further, the system provides directed heat removal by altering typical airflow paths within the cabinet. The backup ventilation system is powered by auxiliary power in the case of power failure and uses the same fan(s) for ventilation as is used for cooling. The disclosure provides a more efficient, higher capacity cooling cabinet in less space than otherwise known in the art. Further, the cooling system can anticipate heat loads and therefore operate in a predictive capacity by monitoring input power to the electronic equipment and adjusting the cooling for the expected increase or decrease in heat load generated based on the input power.

Abstract: Disclosed are a method and device for a refrigerant-based thermal storage system wherein a condensing unit and an ice-tank heat exchanger can be isolated through a second heat exchanger. The disclosed embodiments provide a refrigerant-based ice storage system with increased reliability, lower cost components, and reduced power consumption compared to a single phase system such as a glycol system.

Abstract: A refrigerator includes a Stirling refrigerating machine having a high-temperature heat radiation portion and a low-temperature heat absorption portion and for cooling a freezing compartment, and a compressor for circulating a first refrigerant through a first circulation circuit having a cooling compartment evaporator. The high-temperature heat radiation portion is in contact with a first circulation spiral portion formed in the first circulation circuit.

Abstract: Disclosed are a method and device for a refrigerant-based thermal storage system wherein a condensing unit and an ice-tank heat exchanger can be isolated through a second heat exchanger. The disclosed embodiments provide a refrigerant-based ice storage system with increased reliability, lower cost components, and reduced power consumption compared to a single phase system such as a glycol system.

Abstract: A refrigeration system for merchandisers, drug cabinets and similar enclosures (10) that continues to provide temperature control during periods when external power is not necessarily available. The system typically has a compressor/condenser subsystem (11) that is powered by mains electricity (16) and a second subsystem (12) that includes an insulated eutectic tank. The compressor/condensor (11) cools the tank (12) using external electrical power, when available, while the tank cools the enclosure (10) without requiring external power. A refrigerant loop (14) between the second subsystem (12) and the enclosure (10) operates by way of convection and/or gravity and a simple controller (15).

Abstract: The system (SC) includes a first, vapour compression circuit (A), including a compressor (1) with its output connected to a condenser (2; 2?) followed by an expansion device (4) and an evaporator (5; 16) having its output connected to the in of the compressor (1); a second, absorption circuit (B) with a hygroscopic solution flowing through it in operation and including a regenerator (11) with semipermeable membranes operable to allow the said solution to give up moisture (water) to a first airflow flowing in the regenerator (11) in operation, a dehumidifier (13) with semipermeable membranes arranged downstream of the regenerator (11) and operable to allow a second airflow to give up moisture to the hygroscopic solution, and a circulation pump (14). The first and second circuits (A, B) are connected by at least one heat exchanger (5) in which the hygroscopic solution flowing through the second circuit (B) gives up heat to the cooling fluid flowing through the first circuit (A).

Abstract: According to one embodiment of the invention, a jet ejector method includes providing a primary jet ejector having a primary inlet stream, coupling one or more secondary jet ejectors to the primary jet ejector such that all of the jet ejectors are in a cascaded arrangement, bleeding off a portion of the primary inlet stream and directing the portion of the primary inlet stream to the secondary jet ejector that is closest to the primary jet ejector in the cascaded arrangement, and directing a motive fluid into the secondary jet ejector that is farthest from the primary jet ejector in the cascaded arrangement. The method further includes, at each secondary jet ejector, receiving at least some of the portion of the primary inlet stream and at least some of the motive fluid to create respective mixtures within the secondary jet ejectors, and at each secondary jet ejector, directing at least a portion of the respective mixture to adjacent jet ejectors in the cascaded arrangement.

Abstract: A refrigeration system for multi-temperature and single-temperature applications combines a refrigeration circuit and a single-phase fluid heat-transfer circuit in heat-conducting contact through a thermoelectric device. A vapor compression cycle provides a first stage of cooling and the thermoelectric device in conjunction with the heat-transfer circuit provides the second stage of cooling. Polarity of the thermoelectric device can be reversed to provide a defrost function for the refrigeration system.

Abstract: Backup refrigeration is provided to a cryogenic refrigeration system comprising multiple cooling loops using a single backup coolant storage vessel. The backup coolant storage vessel is in fluid communication with at least one of the cooling loops, and the cooling loops are in fluid communication with each other. Each cooling loop, in turn, is in fluid communication with a refrigeration unit. In the event of lost coolant from one of the loops, coolant, e.g., liquid nitrogen, is transferred from the other loops to the loop that lost coolant, and the backup coolant storage vessel releases backup coolant into the system.

Abstract: According to one embodiment of the invention, a vapor-compression evaporation system includes a plurality of vessels in series each containing a feed having a nonvolatile component. A first set of the plurality of vessels includes vapor-compression evaporators and a second set of the plurality of vessels includes multi-effect evaporators. A mechanical compressor is coupled to the last vessel in the series of vapor-compression evaporators and is operable to receive a vapor therefrom. A turbine is coupled to, and operable to drive, the mechanical compressor. A pump is operable to deliver a cooling liquid to the mechanical compressor, and a tank is coupled to the mechanical compressor and is operable to separate liquid and vapor received from the mechanical compressor. A plurality of heat exchangers is coupled inside respective ones of the vessels, wherein the heat exchanger in the first vessel in the first set is operable to receive the vapor from the tank, and at least some of the vapor condenses therein.

Abstract: A chiller system includes a refrigerant loop, the refrigerant loop further including a compressor, an air-cooled condenser arrangement and an evaporator arrangement connected in a first closed refrigerant loop. A motor is connected to the compressor to drive the compressor, a drive is connected to the motor to power the motor and a power/control panel controls the refrigerant loop. The power/control panel and the condenser arrangement are connected in a second closed coolant loop. The second closed coolant loop provides cooling to the enclosure and/or components within the enclosure disposed on a chill plate. Condensation is substantially prevented from forming inside the enclosure, despite the enclosure lacking a humidity control device.

Abstract: A constant temperature refrigeration system for extensive temperature range application comprising a refrigerator, a low-temperature heat exchanger, a medium-temperature heat exchanger, a high-temperature heat exchanger, a pump, a first solenoid valve, a second solenoid valve, a third solenoid valve, a temperature sensor, a power regulator, a controller and a plurality of heaters, the temperature sensor is utilized for determining the working fluid temperature and compare the actual input temperature, the actual output temperature and the predetermined temperature, and the controller is utilized for switching the first solenoid valve, the second solenoid valve and the third solenoid valve for conveying the fluid to flow through various heat exchangers so that the working fluid is heated or cooled, with the result being that the working fluid temperature outputted is to reach the predetermined temperature, so as to acquire the working fluid having the exactly and precisely predetermined low temperature (?40° C

Abstract: A cooling system that has a heat exchanger which is housed in one enclosure and is constituted of a plurality of heat exchange modes, and the heat exchanger includes a refrigerant forced circulation mode, a refrigerant natural circulation mode, and a ventilation mode. A temperature detector performs switching to an optimal mode, to thereby cool the inside of the enclosure of a housing accommodating equipment including a heat-generating component.

Abstract: A compressor having a housing with a compression mechanism mounted therein. A suction fluid passageway is located in the housing through which the compression mechanism receives refrigerant fluid. A thermoelectric device is in thermal communication with refrigerant fluid substantially at suction pressure in the suction fluid passageway. The thermoelectric device receives thermal energy from the suction fluid passageway and refrigerant fluid therein with the thermal energy being transferred from the compressor assembly.

Abstract: A system for refrigeration of products includes a case having a compartment defining a space configured to receive the products. A first heat exchanger is configured to cool a fluid communicating with the space to cool the objects. A second heat exchanger is configured to receive a heat supply from an air source to warm the fluid. At least one coolant supply line and at least one coolant discharge line are configured to direct the fluid in communication with the space.

Abstract: A refrigerator including a refrigerator compartment, a refrigerator door coupled to the refrigerator compartment, the refrigerator door has an inner surface. The refrigerator further includes a bin for storing items therein mounted to the inner surface of the refrigerator door and at least one thermoelectric module operationally coupled to the bin, such that the bin is temperature controlled independent of the refrigerator compartment.

Abstract: Apparatus for conditioning air comprising: a quantity of liquid desiccant (28); a dehumidifier section (12) in which air to be conditioned is brought into contact with a first portion of the liquid desiccant; a regenerator section (32) in which outside air is brought into contact with a second portion of the liquid desiccant; and a refrigeration system (45) having a first heat exchanger (46) associated with the first portion of liquid desiccant and a second heat exchanger (36) associated with the second portion of liquid desiccant and a third heat exchanger (136) that does not contact the liquid desiccant.

Abstract: A distributed refrigeration system has a temperature controlled case configured to store and display objects in a facility, a first coolant adapted to cool the objects and circulate through a first cooling system configured to operate with the case, and a second cooling system communicating with the first cooling system to receive a second coolant for removing heat from the first coolant. A method of providing a distributed refrigeration system for delivery to a facility includes providing a temperature-controlled case to store and display objects within a facility, assembling a self-contained first cooling system with the case to circulate a first coolant to cool the objects, and providing a second cooling system communicating with the first cooling system, the second cooling system having a supply connection and a return connection to circulate a second coolant to remove heat from the first coolant.

Abstract: In a display cabinet (21) articles such as food placed on a shelf (20) can be kept cooler by having a heat pipe in the shelf with one end of the heat pipe (20a) cooled by the cabinet's cooling system (22).

Abstract: An air conditioning unit (1) for interiors is disclosed, carrying out a method comprising the following steps: carrying out a first thermal exchange between a first quantity of air drawn from an interior to be conditioned (A) and a second quantity of air drawn from the external ambient (E) in a first heat exchanger (7); after the first thermal exchange conveying the second quantity of air to a thermal exchange bank (12) connected to a thermal recovery bank (10) both belonging to a refrigerating circuit to carry out a second thermal exchange; after the second thermal exchange conveying the second quantity of air to the interior to be conditioned (A); after the first thermal exchange effecting a further thermal exchange between the first quantity of air and the recovery bank (10) before discharging the first quantity of air to the external ambient (E).

Abstract: A heat pump system for cooling (refrigeration) or heating is provided by employing a combination of natural media such as ammonia and CO2. The heat pump system (1) combines an ammonia cycle (2) and a CO2 cycle (3), and the CO2 medium in the CO2 cycle (3) is circulated, by natural circulation due to a difference of fluid heads of the CO2 medium in the cycle without the necessity of incorporating a compressor, and by partial heating or cooling of the cycle. The structural elements of the ammonia cycle (2) are located away from the devices for the desired refrigeration and heating.

Abstract: A heat exchanger using thermoelectric structures is provided for cooling a heat generating component of an electronic device. The heat exchanger includes a row of spaced passages, for example, formed by two or more separate tubes or a single coiled tube, for carrying a first cooling fluid. The heat exchanger further includes a thermoelectric structure disposed between adjacent spaced passages and exposed to a second cooling fluid. In one embodiment, the heat exchange also includes fins disposed between the same adjacent spaced passages so that the thermoelectric structure is disposed between the adjacent passages and the fins.

Abstract: A method and a device for use in the air conditioning of an interior of a motor vehicle equipped with an air conditioning system. In particular, the condensation water, produced when operating the air conditioning system while driving, is collected when the vehicle is standing still, and the intake air supplied to the interior or the outgoing air removed from the interior is humidified with the collected water so that the vehicle is cooled by evaporative cooling when it is standing still. While driving, the outside air intake may be pre-cooled by the cooled outgoing air by using a heat exchanger.

Abstract: An air conditioning arrangement for an emergency vehicle or the like including an evaporator unit comprising closely spaced first and second tubing arrays, with each array being operably associated with a respective refrigerant compressor. The tubing of each array is formed into coils involving a number of essentially parallel tubing runs connected by curved end members, with substantial portions of the tubing being provided with fins. A low voltage blower is positioned to cause air to be pulled across the tubing of the first and second tubing arrays and between the fin members.

Abstract: A heat pump includes a compressor having an inlet and an outlet, an indoor heat exchanger and an outdoor heat exchanger, and an outdoor thermal expansion valve. The heat pump further includes an auxiliary heat exchanger. An auxiliary fluid line and an auxiliary fluid pump circulate an auxiliary heat transfer fluid through the auxiliary fluid line. The compressor outlet, the indoor heat exchanger, the outdoor thermal expansion valve, the auxiliary heat exchanger, the outdoor heat exchanger, and the compressor inlet can be placed in respective serial fluid communication to thereby circulate a refrigerant fluid through the heat pump. The auxiliary heat exchanger is configured to exchange heat between the refrigerant fluid and the auxiliary heat transfer fluid. The auxiliary fluid line is in thermal energy communication with a primary source of auxiliary heat. Preferably, the primary source of auxiliary heat is a fluid contained within a septic tank.

Abstract: A method and apparatus for enhancing the power output and operational efficiency of a combustion turbine system using a combined refrigerant substantially comprising a first refrigerant and a second refrigerant, whereby the combined refrigerant exhibits a total pressure substantially greater than each respective first and second refrigerant at a temperature inside an evaporative chiller. In a preferred embodiment, the combined refrigerant cools turbine inlet air through the exchange of heat from the inlet air, in an air chiller, with a coolant which is cooled by the combined refrigerant in the evaporative chiller. The combined refrigerant, after it is used to cool the coolant in the evaporative chiller, is separated through the use of a liquid absorbent which absorbs the second refrigerant to form a solution pair. The non-absorbed first refrigerant is compressed, condensed and then recirculated to eventually join the second refrigerant which is desorbed from the solution pair in a regenerator.

Abstract: A thermosiphon for a refrigerating machine which can maintain smooth circulation of working fluid by ensuring the flow of the working fluid into a condenser even if it is condensed in a connecting end of a gas pipe connected to the condenser. The gas pipe 16 connected to the condenser 12 has a connecting end which is formed with a riser pipe 28, thereby constructing a reverse-flow suppressing portion 30 which is brought to a higher position than the condenser 12. Thus, even if the working fluid is condensed in the riser pipe 28, the condensed working fluid can be forcedly allowed to flow down into the condenser 12 by gravitational force.

Abstract: An air conditioning unit (1) for interiors is disclosed, carrying out a method comprising the following steps: carrying out a first thermal exchange between a first quantity of air drawn from an interior to be conditioned (A) and a second quantity of air drawn from the external ambient (E) in a first heat exchanger (7); after the first thermal exchange conveying the second quantity of air to a thermal exchange bank (12) connected to a thermal recovery bank (10) both belonging to a refrigerating circuit to carry out a second thermal exchange; after the second thermal exchange conveying the second quantity of air to the interior to be conditioned (A); after the first thermal exchange effecting a further thermal exchange between the first quantity of air and the recovery bank (10) before discharging the first quantity of air to the external ambient (E).

Abstract: Novel vapor compression evaporative cooling systems which use water as a refrigerant are provided, as are methods for using same. Also provided are novel compressors, compressor components, and means for removing noncondensibles useful in such cooling systems.

Abstract: A thermosiphon is provided of low cost and simple construction and having a condenser which can reliably discharge a condensed working fluid from an outlet pipe even if the apparatus is somewhat inclined. A thermosiphon 1 comprises a condenser 2 connected to a cold part B of a refrigeration apparatus A, and a capillary 3a and a large diameter pipe 3b connected to the condenser 2 and which can pass a working fluid thereinside. The condenser 2 comprises; an attachment part 4 attached to the cold part B for conducting cold from the cold part B, and a condensing part 5 provided at an end of the attachment part 4 for condensing the working fluid. The condensing part 5 has a cavity portion 6 thereinside, and an inside bottom part 6a of the cavity portion 6 is formed descending towards an outlet hole 12 communicating with the capillary 3a for the working fluid.

Abstract: A thermosiphon for a refrigerating machine which can maintain smooth circulation of working fluid by ensuring the flow of the working fluid into a condenser even if it is condensed in a connecting end of a gas pipe connected to the condenser. The gas pipe 16 connected to the condenser 12 has a connecting end which is formed with a riser pipe 28, thereby constructing a reverse-flow suppressing portion 30 which is brought to a higher position than the condenser 12. Thus, even if the working fluid is condensed in the riser pipe 28, the condensed working fluid can be forcedly allowed to flow down into the condenser 12 by gravitational force.

Abstract: A hybrid air-conditioner comprises a vapor adsorption cycle air-conditioner, a vapor compression refrigerating cycle air-conditioner, an external heat source circuit and the like. In the case where the external heat source temperature is in a high temperature range, the cooling operation is performed using only the vapor adsorption cycle air-conditioner. In the case where the external heat source temperature is in a low temperature range, the cooling operation is performed using only the vapor compression refrigerating cycle air-conditioner. In the case where the external heat source temperature is in an intermediate temperature range, the cooling operation is performed using both the vapor adsorption cycle air-conditioner and the vapor compression refrigerating cycle air-conditioner. As a result, the temperature restrictions on the vapor adsorption cycle air-conditioner can be removed and the range of operation allowance can be widened.

Abstract: A non-compression cascade refrigeration system 30 for refrigerating a closed refrigerated space includes a cascade condenser 34 in heat exchange relationship with a primary evaporator 24, a cascade evaporator 28 positioned in the refrigerated space 40 and a liquid and vapor separator 42. A first coolant delivery conduit 44 delivers liquid coolant from the cascade condenser 34 to the separator 42 which then provides the coolant through a second coolant delivery conduit 46 to the cascade evaporator 28 for cooling the refrigerated space 40. A first coolant return conduit 50 returns the coolant from the cascade evaporator 28 to the separator 42 where the return coolant is separated into liquid and gaseous coolant, such that the liquid coolant is directed to the second delivery conduit 46 for reuse in the cascade evaporator 28 and the gaseous coolant is directed to a second coolant return conduit 52 and returned to the cascade condenser 34.

Abstract: A heat exchanger (1) on the secondary heat source, which exchanges heat with a heat exchanger (12) on the primary heat source in a primary cooling circuit (A), is connected with an indoor heat exchanger (3) through a gas pipe (6) and a liquid pipe (7). A tank (T) storing a liquid cooling medium is connected at its lower end to the liquid pipe (7) and its upper end to a pressure adjustment mechanism (18). Check valves (CV1 and CV2) are disposed on both sides of the connecting point of the tank (T) with respect to the liquid pipe (7).