2185results about "Compression machines with several evaporators" patented technology

Vehicle heat pump system comprising a compressor for discharging a refrigerant; an indoor heat exchanger in an air-conditioning case, allowing heat exchange between air and the refrigerant; a water-cooled condenser downstream of the indoor heat exchanger in the flow direction of the refrigerant, exchanging heat with first cooling water; an outdoor heat exchanger downstream of the water-cooled condenser, allowing heat exchange between the refrigerant and outdoor air; an evaporator in the air-conditioning case, allowing heat exchange between the refrigerant and the air to cool the indoor space, and a chiller downstream of the outdoor heat exchanger exchanging heat with second cooling water. An outdoor unit bypass line allowing refrigerant to pass through the water-cooled condenser and bypass the outdoor heat exchanger, which branches off between the water-cooled condenser and the outdoor heat exchanger and is connected to the upstream side of the chiller in the flow direction of the refrigerant.

A thermal management system, comprising: a primary coolant circulation system for cooling a first coolant by circulating the first coolant which is heat-exchanged with cooling water through a first water-cooled condenser; a secondary coolant circulation system for cooling a battery chiller by using a second coolant which is heat-exchanged with the first coolant of the primary coolant circulation system; and a second cooling line for cooling a battery by circulating cooling water which is heat-exchanged through the battery chiller, wherein the number of revolutions of the first condenser of the primary coolant circulation system is less than the number of revolutions of the second condenser of the secondary coolant circulation system, or the first coolant and the second coolant are heat-exchanged via the cooling water, such that the battery can be cooled efficiently during rapid charging.

A battery heating device includes: a radiator and a heater core arranged in parallel with each other; a battery temperature adjusting unit for heating a battery with a heat medium; a first branch branching the heat medium between the radiator and the heater core; a first confluence where the heat medium merges; a second branch where the heat medium from a heat emitter is branched to the battery temperature adjustment unit; a second confluence where the heat medium flowing through the battery temperature adjustment unit merges; and a radiator flow rate reducing part arranged in a passage for the heat medium from the first branch or the second branch closer to the radiator to the first confluence or the second confluence closer to the radiator via the radiator.

A ventilation system includes: a housing including a first inlet drawing outdoor into the housing, a second inlet drawing room air into the housing, a first outlet discharging outdoor air into an indoor space, and a second outlet discharging room air to an outdoor space; a total heat exchanger exchanging heat between the outdoor air and the room air; a first heat exchanger between the first inlet and the total heat exchanger; a second heat exchanger between the first inlet and the first heat exchanger; a compressor supplying a refrigerant to the first heat exchanger and the second heat exchanger; a four-way valve switching a flow direction of the refrigerant; a first expansion device at an inlet of the first heat exchanger expanding the refrigerant; a second expansion device between the first heat exchanger and the second heat exchanger and expanding the refrigerant; and at least one processor.

Disclosed is a method for defrosting a thermal regulation circuit for a vehicle, in particular for a motor vehicle, the thermal regulation circuit being provided with a refrigerant circulation loop comprising a first heat exchanger (2), susceptible to frosting, as well as second and third exchangers (4, 6), the second and third exchangers (4, 6) being intended to exchange heat between the refrigerant and a heat transfer fluid, the loop further comprising a bottle (12) for storing a part of the refrigerant, the method comprising a step, referred to as defrosting, of circulating the refrigerant successively in the second heat exchanger (4), the bottle (12) and then the first and third exchangers (2, 6), with cooling of the refrigerant in the first and second exchangers (2, 4) and heating of the refrigerant in the third exchanger (6).

A heat exchanger according to the present disclosure comprises a plurality of heat transfer tubes and a refrigerant distributor that extends in a transverse, horizontal direction and distributes a refrigerant to the plurality of heat transfer tubes, wherein the heat exchanger is configured from at least one heat exchanger part in which a structure part is provided upstream or in an upstream section of the refrigerant distributor in a refrigerant flow direction when functioning as an evaporator. An air conditioner according to the present disclosure is provided with this heat exchanger. The refrigerant distributor has: an outer pipe in which the refrigerant flows and to which the plurality of heat transfer tubes are connected at predetermined intervals; and an inner pipe in which the refrigerant flows and which is disposed on the inner peripheral side of the outer pipe. The inner pipe is provided with a plurality of refrigerant outflow holes that cause the refrigerant flowing therein to flow out to a space between the outer pipe and the inner pipe. The number of holes of the plurality of refrigerant outflow holes provided in the inner pipe satisfies (Nt -1) / 6 ≤ No < (Nt -1) when No is defined as the number of holes and Nt is defined as the number of the plurality of heat transfer tubes. The structure part brings the state of the refrigerant flowing in the inner pipe into a state in which a gas-liquid two-phase flow does not develop when functioning as an evaporator.

A cooling system includes a liquid loop, a vapor compression loop, and a heat exchanger in fluid communication with each of the liquid loop and the vapor compression cycle loop. The liquid loop includes a cold sink for cooling a heat load. The vapor compression cycle loop is fluidly coupled to the liquid loop by a separator, which is configured to separate a two-phase form of a working fluid received from the cold sink into a vapor form of the working fluid and a liquid form of the working fluid.

The invention provides a solar energy-air energy composite heat pump system based on self-contained energy storage cascade application and a control method. The solar energy-air energy composite heat pump system comprises a heat pump host module, a solar module and a hydraulic module. Hot water generated by the solar heat collector is accumulated in the energy storage water tank and serves as an external heat source for active enhanced vapor injection to improve the performance of the heat pump. An active enhanced vapor injection device is designed for a heat pump host module, a refrigerant in an economizer absorbs heat of heat storage hot water, is jetted to a middle pressure cavity of a compressor and is converted into heating capacity, and the performance of the heat pump is greatly improved. When it is detected that the temperature in the heat storage water tank is reduced to a certain temperature, the flow direction of the heat storage hot water is switched through the switching assembly, the heat storage hot water is pumped to the heat pump fluorine-water heat exchanger for heat exchange, the heat pump performance is improved, and cascade application of the heat storage hot water is achieved. Refrigerant flows in the fin type heat exchanger and the fluorine-water heat exchanger are controlled by respective electronic expansion valves, and the opening degrees of the fin type heat exchanger and the fluorine-water heat exchanger are adjusted according to respective air suction superheat degrees, so that respective optimal heat exchange effects are realized.

A plurality of components of a refrigeration cycle are connected to a connection module. The connection module includes a body having a refrigerant flow path that constitutes a part of a refrigerant flow path in the refrigeration cycle. The refrigerant flow path includes a high-temperature-side flow path and a low-temperature-side flow path. The high-temperature-side flow path has a connection port to which a high-temperature-side component of the plurality of components, through which a high-pressure refrigerant of the refrigeration cycle flows, is connectable. The low-temperature-side flow path has a connection port to which a low-temperature-side component of the plurality of components, through which a refrigerant having a lower temperature than the high-pressure refrigerant flows, is connectable.

A refrigeration circuit comprising one first compressor (1), a first gas-cooler (7), connected to the first compressor through a common discharge line (41), a medium temperature expansion valve (19), a medium temperature heat exchanger (20), a liquid receiver (17) that is connected to an outlet liquid line (80) that splits in a first liquid line (81) that connects with the medium temperature heat exchanger and a second liquid line (82) that comprises a first expansion valve (28), to a first pressure reduction valve (14) and to a first heat exchanger (18), wherein the refrigerant flowing through the second liquid line is also mixed with the refrigerant from the first liquid line leaving the medium temperature heat exchanger and the mixture enters the first heat exchanger to exchange heat with the refrigerant in the first liquid line to be directed to the first compressor through a suction line (59).

The invention discloses a heat and humidity balance type two-stage temperature control and humidity adjustment air conditioning system and a control method, and belongs to the technical field of air constant temperature and humidity treatment, the heat and humidity balance type two-stage temperature control and humidity adjustment air conditioning system comprises a refrigeration air conditioning system, an air treatment unit, a heat and humidity balance system and a temperature fine adjustment system based on cold and heat recovery, the air handling unit is used for conducting temperature and humidity treatment on the treated air. The air conditioning system switches operation modes, namely a pure refrigeration regulation mode, a low-temperature and constant-humidity regulation mode, a medium-temperature and constant-humidity regulation mode, a high-temperature and constant-humidity regulation mode and a pure heating regulation mode. According to the heat and humidity balancer, the problems that when a traditional air conditioner conducts temperature and humidity adjustment, temperature control and humidity control interfere with each other, and ultra-precise independent control is difficult to achieve are solved, and the novel air conditioning system has the wider temperature and humidity application range and the high temperature and humidity adjustment and control precision.

A test chamber and a method for conditioning air in a test space thereof for receiving test material, the test space being configured to be sealed from an environment and temperature-insulated, a cooling device of a temperature control device of the test chamber, which comprises a cooling circuit with carbon dioxide as a refrigerant, a heat exchanger in the test space, a low-pressure compressor, and a high-pressure compressor, a gas cooler, and an expansion valve downstream of the low-pressure compressor in a flow direction of the refrigerant, being used to establish a temperature between −20° C. to +180° C. within the test space, a control device of the test chamber being used to control the temperature and / or a relative humidity in the test space. A dehumidifier bypass of the cooling circuit, which comprises a second expansion valve and a second heat exchanger, is used to dehumidify air in the test space.

The present invention relates to a method for operating a supercritical refrigerant circuit (10), in particular for a motor vehicle. The refrigerant circuit (10) comprises a main circuit (12) with a compressor (14), an electronically controlled and lockable first expansion valve (18), a gas cooler (16) for heating a medium to be heated, and at least one pressure sensor (26B), which are arranged downstream of the compressor (14) and upstream of the first expansion valve (18), a chiller (20) and / or an evaporator (22) for cooling a medium to be cooled, which are arranged downstream of the first expansion valve (18) and upstream of the compressor (14), and a refrigerant receiver (24) downstream of the chiller (20) and / or evaporator (22) and upstream of the compressor (14).The refrigerant circuit (10) further comprises at least a first branch (30) with a lockable second expansion valve (32), which branches off downstream from the compressor (14) and upstream from the gas cooler (16) and is connected to the refrigerant receiver (24), wherein the pressure between compressor (14) and first expansion valve (18), preferably between compressor (14) and gas cooler (16), is determined.The refrigerant circuit (10) is characterized in that, when it is detected that the pressure downstream of the compressor (14) and upstream of the first expansion valve (18) is below a specified first pressure value (P1), the main circuit (12) is shut down, in particular by closing the first expansion valve (18) and opening the second expansion valve (32), so that the refrigerant flow downstream of the compressor (14) is essentially completely routed through the first branch (30) to be drawn back into the compressor (14) via the refrigerant receiver (24).

The invention discloses an energy storage system and a photovoltaic energy storage system, and belongs to the technical field of energy storage. The energy storage system comprises a refrigerating circuit, an energy storage battery, a first flow path, an electronic device, a second flow path, a radiator, a valve bank, a water receiving tank and a spraying device. A plurality of valve ports of the valve bank are connected with a second path of the condenser, a second path of the first evaporator, the first flow path, the second flow path and the radiator. The water receiving tank is located below the second evaporator in the gravity direction and used for receiving and storing condensate water. The spraying device communicates with the water receiving tank and is suitable for facing the radiator. By means of the structure, collection and recycling of condensate water are achieved, the heat exchange capacity of the radiator is enhanced, the independent dehumidification function is achieved, part of refrigerants can be extracted for synchronous dehumidification, the heat management requirement and the dehumidification requirement are both considered, the practicability and the use width of the energy storage system are increased, the size of a liquid cooling unit is reduced, and the space utilization rate of the energy storage system is increased; a plurality of heat management modes are realized, and the comprehensive use performance is improved.

A method for controlling a climate control circuit includes detecting one or more operating parameters of an evaporator expansion valve ("EXV", 140) in the climate control circuit, and determining operation stability of the EXV based on the one or more operating parameters of the EXV. The method also includes opening a bypass pathway (124) in response to determining the operation of the EXV is unstable, the bypass pathway includes an intermediate heat exchanger (130, economizer) and a second expansion valve (136) disposed in parallel with the first expansion valve (140), such that the intermediate heat exchanger cools a first portion of the working fluid flowing into the EXV using a second portion of the working fluid. A climate control system includes a climate control circuit, one or more sensors (192 A-D) for the climate control circuit, and a climate controller (190) to control the climate control circuit based on stability of an EXV in the climate control circuit.

A heat pump system for a vehicle includes a condenser, a heat-exchanger, an expansion valve, an evaporator, and a gas injection device and is capable of improving the cooling and heating performance. The gas injection device includes a gas-liquid separator, a first valve module, and a second valve module and is configured to selectively operate in a selected air conditioning mode of a vehicle interior.

A heat pump assembly with a chiller for battery-powered vehicles, having a refrigerant circuit with a compressor, a heating condenser, a refrigerant valve with an expansion function, an ambient heat exchanger, at least one evaporator with an associated refrigerant valve with an expansion function, as well as a 3 / 2-way refrigerant valve with an expansion function disposed in parallel to the evaporator with a refrigerant path via a chiller bypass and a refrigerant path via a chiller.

A heat pump includes a refrigerant loop. The refrigerant loop includes a compressor, a first region of a first heat exchanger, a second heat exchanger, and a bypass branch. The compressor includes a low-pressure inlet, a mid-pressure inlet, and an outlet. The first heat exchanger is positioned downstream of the outlet of the compressor. The second heat exchanger is positioned downstream of the first heat exchanger. The bypass branch includes an entrance and an exit. The entrance to the bypass branch is positioned downstream of the outlet of the compressor and upstream of the first region of the first heat exchanger. The exit of the bypass branch is positioned upstream of the second heat exchanger.

The switching device includes a first five-way switching unit, a second five-way switching unit, and a drive unit. The first five-way switching unit includes a first switching plate, and the second five-way switching unit includes a second switching plate. The drive unit includes a first gear part capable of driving the first switching plate, a second gear part capable of driving the second switching plate, and a drive portion for driving the first gear part and the second gear part. The gear ratio of the first gear portion to the second gear portion is 2 or more.

An embodiment heat pump system for a vehicle includes an air conditioner unit and a chiller. The air conditioner unit includes a compressor, first through third heat-exchangers, a first expansion valve, and an evaporator interconnected by a refrigerant line for circulating a refrigerant through the refrigerant line, and the chiller is connected to the refrigerant line through a first connection line for adjusting a temperature of a coolant by heat-exchanging the refrigerant with the coolant. The air conditioner unit further includes a second expansion valve on the first connection line upstream of the chiller, a first valve on the refrigerant line between the first and second heat-exchangers, a third expansion valve on the refrigerant line between the first valve and the second heat-exchanger, a second valve on the refrigerant line between the evaporator and the compressor, and a fourth expansion valve on a second connection line.

The present invention relates to a cooling and heating heat pump system having a dehumidifying unit in an indoor unit, the heat pump system comprising: a cooling line in which a high-temperature and high-pressure refrigerant discharged at a discharge side of a compressor passes through a four-way valve, passes through an outdoor unit and a first expansion valve, is converted into a low-temperature and low-pressure refrigerant, passes through an indoor heat exchanger seated in the indoor unit, flows into the four-way valve, and is then circulated back to a suction side of the compressor; and a dehumidifying line in which a high-temperature and high-pressure refrigerant discharged at the discharge side of the compressor is discharged via the dehumidifying line formed between the discharge side and the four-way valve, the high-temperature and high-pressure refrigerant, which has passed through a top refrigerant line of a dehumidifying heat exchanger seated in parallel with and spaced apart from a lower end of the indoor heat exchanger of the indoor unit, passes through a second expansion valve, is converted into a low-temperature and low-pressure refrigerant, and flows back into a bottom refrigerant line of the dehumidifying heat exchanger, and the passing refrigerant is circulated to the compressor via the suction side of the compressor.

The present disclosure provides a heat pump and a control method thereof. The heat pump according to an embodiment of the present disclosure includes: a circulation flow path in which a flow direction of a refrigerant is switched depending on a cooling mode or a heating mode; a first outdoor heat exchanger and a second outdoor evaporative heat exchanger arranged in series on the circulation flow path; and a flow path switching valve disposed on the circulation flow path and switching the flow direction of the refrigerant in the circulation flow path so that the refrigerant is evaporated while flowing in the order of the second outdoor evaporative heat exchanger and the first outdoor heat exchanger in the heating mode.

An integrated thermal management system for a fuel cell vehicle includes a fuel cell coolant line configured to circulate first coolant through a fuel cell, a battery chiller, and an integrated chiller, an indoor air-conditioning refrigerant line configured to circulate refrigerant through a first compressor, an indoor condenser, an outdoor heat exchanger, and the integrated chiller, and a battery refrigerant line configured to circulate refrigerant through a second compressor, an outdoor condenser, and the battery chiller.

A thermal conditioning system including a heat-transfer circuit, a refrigerant circuit including successively: a compressor, a first bi-fluid exchanger and a second bi-fluid exchanger arranged jointly on the refrigerant circuit and on a main loop of the heat-transfer circuit, a first expansion valve, a third bi-fluid exchanger arranged jointly on the refrigerant circuit and on a secondary loop of the heat-transfer circuit, a first branch of the heat-transfer circuit being configured so that the heat-transfer liquid leaving the first bi-fluid exchanger returns to the first bi-fluid exchanger without passing through the second bi-fluid exchanger, and including a second heat exchanger configured to exchange with a second air flow. A second branch connects the first branch to the main loop, and includes a third heat exchanger configured to exchange with the second air flow.

A heat pump system for a vehicle may efficiently adjust a temperature of a battery module by using a chiller where a refrigerant and a coolant exchange heat. Additionally, the heat pump system for a vehicle may efficiently recollect ambient air heat and waste heat of electrical components to be used for heating the vehicle interior.

The disclosure provides a method of operating a refrigeration system. The method includes operating a first low-temperature evaporator in a refrigeration mode, where the first low-temperature evaporator receives refrigerant from a flash tank. The method includes operating a second low-temperature evaporator in a refrigeration mode, where the first low-temperature evaporator receives refrigerant from the flash tank. The method includes causing the first low-temperature evaporator to operate in the defrost mode by: closing a first controllable valve in a refrigerant conduit that couples the first low-temperature evaporator to a low-temperature compressor of the refrigeration system, and directing the refrigerant exiting the first low-temperature evaporator to be received by the second low-temperature evaporator.

To solve the problem in which, in the case where a plurality of utilization units having different design pressures is connected to a heat source unit, a pressure of a refrigerant flowing in the plurality of utilization units becomes the pressure according to the utilization unit whose design pressure is the smallest, and the utilization units whose design pressure is relatively high cannot sufficiently exert their capacity.SOLUTION: A refrigeration cycle device 1 includes a heat source unit 30, a plurality of utilization units 20, 20a, liquid opening adjustment valves 81, 81a, gas opening adjustment valves 82, 82a, and a control part 40. The liquid opening adjustment valve 81 is provided at a liquid refrigerant communication pipeline 55 on the high pressure side connected to the utilization unit 20 during a cooling operation. The gas opening adjustment valve 82 is provided at a gas refrigerant communication pipeline 56 on the high pressure side connected to the utilization unit 20 during a heating operation. The control part 40 controls the liquid opening adjustment valve 81 or the gas opening adjustment valve 82 based on the design pressure of the utilization unit 20.SELECTED DRAWING: Figure 1

The invention discloses a refrigeration system and refrigeration equipment, and belongs to the technical field of refrigeration, the refrigeration system comprises a compressor, a condenser, a first branch, a second branch, a bypass branch and a control valve, in the first branch, a refrigerant enters the first evaporator for refrigeration after being throttled by the first throttling element; in the second branch, the refrigerant enters the second evaporator for refrigeration after being throttled by the second throttling element; the main air suction port and the auxiliary air suction port can suck air for compression, and the refrigerating capacity is improved. By additionally arranging the bypass branch on the second branch, the first branch can be closed through the control valve when the first evaporator reaches a stop point, and the bypass branch shunts a refrigerant on the second branch to the main air suction port through the flow adjusting piece, so that the main air suction port keeps stable operation, and the problem that the main air suction port cannot be independently closed is effectively solved; the operation efficiency of the refrigerating system is improved.

A method includes receiving, by a processing device and from a variable frequency drive coupled to one or more compressors, operation information of the one or more compressors. The method also includes comparing the operation information of the one or more compressors to an operation threshold and determining that the operation information satisfies the operation threshold. The method also includes changing, based on the determination that the operation information of the one or more compressors satisfies the operation threshold, an operation parameter of a component of the refrigeration system. Changing the operation parameter increases at least one of: (i) a velocity of a working fluid in a piping assembly fluidly coupled to the one or more compressors, or (ii) a flow rate of an oil in the piping assembly flowing into the one or more compressors.

Refrigerant circuit of a combined refrigeration system and heat pump with integrated steam injection circuit, wherein a 3-way valve (2) is arranged as a distribution point in the refrigerant circuit after a compressor (1), and an outdoor condenser / gas cooler (3), a main internal heat exchanger (5) and a check valve (6) as well as a connection point (19) are arranged in a refrigeration system line, and an indoor condenser / gas cooler (4) and a check valve (6) are arranged in a heat pump line,after which the heat pump line is joined to the refrigeration system line at the connection point (19) and the condensed or cooled refrigerant is subsequently led via an expansion device vapor injection (7) via the cold side of a secondary internal heat exchanger (8) to a medium-pressure chiller (9) and subsequently via a direct steam injection connection (18) into the compressor (1) and / or the condensed or cooled refrigerant is led via the warm side of the secondary internal heat exchanger (8) to an evaporator (12) and / or to a low-pressure chiller (13) before the refrigerant vapor is led via a liquid separator suction side (14) and the main internal heat exchanger (5) on the cold side to the suction side of the compressor (1).