1523results 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 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 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.

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.

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.

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).

Refrigeration appliance, in particular a household refrigeration appliance, with a condenser (4), at least one first evaporator (7) cooling a first storage compartment (23), a throttle point (6) connecting an outlet of the condenser (4) to an inlet of the first evaporator (7), a collecting container (8, 30) for liquid refrigerant overflowing from the first evaporator (7), which is connected to an outlet of the first evaporator (7) and is arranged in a warmer environment than the environment of the first evaporator (7), wherein a temperature sensor (20) is assigned to the collecting container (8, 30) and the throttle point (6) comprises a controllable expansion valve (14) which is controlled based on the temperature detected by the temperature sensor (20), characterized in that the controllable expansion valve (14) is designed to control small mass flows and a capillary (15) is connected upstream of the controllable expansion valve (14).

The present invention comprises: a first refrigeration cycle that includes a compressor (102), a condenser (103), a first decompressor (104a), and a first evaporator (105a), that causes a refrigerant (FL1) to flow into the first evaporator, and that cools an object 1 to be cooled; and a second refrigeration cycle that includes the compressor, the condenser, a second decompressor (104b), a second evaporator (105b), and an evaporation pressure adjustment valve (108a), that causes a refrigerant (FL2) having a flow rate greater than that in the first decompressor to flow into the second evaporator, and that cools an object 2 to be cooled. The driving of the compressor is controlled on the basis of the temperature (116) of the object 2 to be cooled, which has been cooled, the open-close degree of the first decompressor is controlled on the basis of the superheating degree 1 of the refrigerant downstream (118) of the first evaporator, the open-close degree of the second decompressor is controlled on the basis of the superheating degree 2 of the refrigerant downstream (119) of the second evaporator, and the open-close degree of the evaporation pressure adjustment valve is controlled on the basis of the target pressure for the refrigerant on the downstream side (120) of the evaporation pressure adjustment valve or the temperature (117) of the object 1 to be cooled, which has been cooled by the first evaporator.

A method of operating a refrigeration system is disclosed. The method comprises cooling a refrigerant using a first high side heat exchanger and reducing a pressure of a first portion of the refrigerant received from the first high side heat exchanger using a first expansion valve. The method comprises separating the refrigerant received from the first expansion valve into a liquid refrigerant and a vapor refrigerant using a receiver tank. The method comprises cooling a first space with the liquid refrigerant received from the receiver tank using a first low side heat exchanger, and recycling the refrigerant exiting the first low side heat exchanger to the receiver tank.

The invention discloses a multi-evaporator branch flow self-adaptive distribution two-phase cooling cycle and a control method thereof, the multi-evaporator branch flow self-adaptive distribution two-phase cooling cycle mainly comprises a plurality of parallel evaporators, a condenser, a liquid storage device, a liquid pump and a connecting pipeline, and a ventilation liquid blocking valve is mounted at an outlet of each branch evaporator. The ventilation liquid blocking valve is mainly composed of a valve seat, a valve element and a floating ball, the opening degree of the valve is automatically adjusted according to the dryness of an inlet working medium under the action of gravity and buoyancy, and the larger the dryness is, the larger the opening degree of the valve is. When the heat loads of the branches are not synchronous, the circulation flow can be distributed in a self-adaptive mode according to needs, the larger the heat loads on the branches are, the higher the dryness of the corresponding working media is, the smaller the resistance of the ventilation liquid blocking valve is, and the larger the flow of the branches is. The smaller the thermal load on the branch is, the smaller the dryness of the corresponding working medium is, the larger the resistance of the ventilation liquid blocking valve is, and the smaller the flow of the branch is. The problem that a high-load branch is prone to being overheated and burnt due to small flow is solved, meanwhile, invalid flow of a low-load branch can be effectively reduced, and energy consumption of a liquid pump is greatly saved.

The present application relates to the field of refrigeration technology and discloses a control method for a cold storage. The cold storage is provided with a first refrigeration system and a second refrigeration system. The first refrigeration system includes a first evaporator, a second evaporator, a first cold storage water tank, and a first fan. The first evaporator is installed inside the first cold storage water tank, and the second evaporator is installed relative to the first fan. The second refrigeration system includes a third evaporator, a fourth evaporator, a second cold storage water tank, and a second fan. The third evaporator is installed inside the second cold storage water tank, and the fourth evaporator is installed relative to the second fan. The method includes: obtaining the ambient temperature of the cold storage; and controlling the operation of the first refrigeration system and the second refrigeration system based on the temperature difference between the ambient temperature of the cold storage and the target temperature of the cold storage. The present application can quickly reduce the temperature inside the storage at the beginning of storage and maintain the low temperature inside the storage by storing cold in the later stage of storage, which is conducive to saving energy. The present application also discloses a control device for the cold storage, the cold storage, and a storage medium.

A vapor injection heat pump system and a method of operating the same are disclosed. The system includes a compressor, an indoor heat exchanger, a vapor injection module, an outdoor heat exchanger, and an evaporator and in which the module includes a first expansion unit, a gas-liquid separator, and a second expansion unit. The method includes performing control in a first heating mode which is a non-vapor injection heating mode or a second heating mode which is a vapor injection heating mode, wherein, in the operation of performing control, a refrigerant introduced into the module is controlled to expand in the first expansion unit, not expand after passing through the gas-liquid separator, and pass through the second expansion unit in the first heating mode, and the refrigerant introduced into the module is controlled to expand primarily in the first expansion unit.

A vehicle drive device (100) includes a rotary electric machine (MG), a power transmission mechanism (GT), an inverter module (INV) configured to control drive of the rotary electric machine (MG), a power supply module (PWR) electrically connected to an onboard battery, a refrigerant circuit module (2) that defines at least part of a refrigerant circuit (20) through which a refrigerant for an onboard air conditioner circulates, and a case (9) including a first housing chamber (E1) that houses the inverter module (INV) and a second housing chamber (E2) that houses the rotary electric machine (MG) and the power transmission mechanism (GT). The power supply module (PWR) and the refrigerant circuit module (2) are attached to the case (9).

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.