233results about "Subcoolers" patented technology

The invention relates to a heat pump device that makes it possible to utilize waste heat from technical processes or from the environment to simultaneously generate useful steam (12) and useful heat. The heat pump device comprises a heat pump module (1), a low-pressure steam generator (2) for generating low-pressure steam (11), a steam jet compressor (3) for generating useful steam (12) from high-pressure steam (10) and the low-pressure steam (11), and a first heat exchanger (4) for providing the useful heat. The heat pump device is suitable for applications where there is a simultaneous demand for both steam and heat.

Provided are a heat exchange component (1) and a heating and cooling control device (1000). The heat exchange component comprises a heat exchanger (11) and an external assembly, wherein a first flow channel (111) and a second flow channel (112), which are independent of each other, are provided in the heat exchanger (11); and the external assembly is mounted on the heat exchanger (11), and comprises a communication device (13) and a throttling device (12). The communication device (13) comprises a first connection port (1321), a second connection port (1322) and a third connection port (1323), every two of which are in communication with each another, wherein the first connection port (1321) is in communication with the first flow channel (111), and the second connection port (1322) is in communication with the second flow channel (112) by means of the throttling device (12).

The present disclosure provides a multi-split air conditioning system and a control method thereof, comprising a compressor, an outdoor heat exchanger, a first gas side pipe, a second gas side pipe and a liquid side pipe, the first gas side pipe, the second gas side pipe and the liquid side pipe are all communicated between the indoor side and the outdoor side, and the first gas side pipe is communicated with the exhaust end of the compressor; further comprising at least one indoor unit, at least one heat storage module, at least one constant temperature dehumidification indoor unit, at least one hot water module, at least one floor heating module, and a photovoltaic module capable of absorbing solar energy and generating electric energy for supply to the multi-split air conditioning system. According to the present disclosure, the effects of constant temperature dehumidification, heat storage defrosting, air conditioning demand, floor heating demand, domestic hot water demand and photovoltaic application can be realized simultaneously through a set of system, the actual needs of users are solved, and each module can be selected to be connected to the system or not according to actual needs.

The invention relates to the technical field of refrigerating systems, and discloses a single-machine double-system type hot fluorine defrosting refrigerating system which comprises a main machine refrigerating system, an auxiliary machine refrigerating system and two gas-liquid separators, the main machine refrigerating system comprises a first-stage compressor, a first-stage condenser, a first-stage expansion valve and a first-stage evaporator, and the auxiliary machine refrigerating system comprises a second-stage compressor, a second-stage condenser, a second-stage expansion valve and a second-stage evaporator; the auxiliary machine refrigeration system comprises a second-stage compressor, a second-stage condenser, a second-stage expansion valve, a second-stage evaporator, a third-stage condenser, a third-stage expansion valve and a third-stage evaporator. According to the technical scheme, the double refrigeration circulation paths are introduced into the refrigeration system, during refrigeration, the main machine refrigeration system is responsible for refrigeration, the auxiliary machine refrigeration system supplies liquid to the main machine refrigeration system for undercooling, the heat load is relieved, and the unit refrigeration capacity is improved; in the defrosting process, the auxiliary machine refrigeration system is adopted for generating high-temperature and high-pressure hot fluorine for defrosting, the energy consumption of hot defrosting is reduced, fire hazards caused by aging of electric heating elements are avoided, and the safety coefficient of system operation is improved.

According to the efficient steam heat pump system with the subcooler and the control method, the outlet end of a compressor is connected with the inlet end of a condenser, the outlet end of the condenser is connected with a refrigerant inlet of the subcooler through a liquid storage device, and a refrigerant outlet of the subcooler is connected with an inlet of an evaporator through an electronic expansion valve; the evaporator outlet is connected with the inlet end of the compressor; the flow of cold water entering the subcooler is controlled through the proportional three-way adjusting valve, the water outlet end of the subcooler is connected with the water inlet end of the condenser, the flow of the cold water entering the condenser is adjusted through the flow adjusting valve, and redundant flow enters the redundant heat storage box through the electric valve. The supercooler and the redundant heat storage box are additionally arranged, so that the supercooling degree of a refrigerant is accurately controlled, the system efficiency is improved, the comprehensive utilization rate of energy can be effectively improved, and the system operation cost is reduced.

A system includes a pressure exchanger (PX) configured to receive a first fluid, receive a second fluid, and exchange pressure between the first fluid and the second fluid. The system further includes a first gas cooler, configured to provide working fluid to a first inlet of a heat exchanger and a second inlet of a heat exchanger. The heat exchanger is configured to exchange heat between fluid provided via the first inlet and fluid provided via the second inlet. A first outlet of the heat exchanger provides the first fluid to the PX. A second outlet of the heat exchanger provides the second fluid to the PX. The system further includes a receiver, configured to receive the first fluid and the second fluid from the PX. The system further includes a first compressor, configured to provide working fluid to the first gas cooler.

Systems and methods for regenerative ejector-based cooling cycles that utilize an ejector as the motivating force in a cooling loop to regeneratively sub-cool a refrigerant in a single-stage cooling cycle.

The invention discloses a subcooler and a deep subcooler for a refrigerating system and a control method of the subcooler and the deep subcooler, and belongs to the technical field of refrigeration. The deep subcooler comprises a subcooling heat exchange unit, an independent cold source loop and a pressure control valve; the supercooling heat exchange unit is connected between the high-pressure liquid reservoir and the throttling device in series, and the primary liquid refrigerant is deeply cooled to be equal to or close to the target value of the evaporation temperature through low-temperature cooling capacity provided by a low-pressure evaporation system or an independent cold source loop. The independent cold source is driven by a compressor with the minimum refrigerating capacity in the system, and an air return pipeline of the independent cold source is bridged with air return pipelines of other compressors of the system through an outlet pressure balance valve, so that the surplus refrigerating capacity is fully utilized. The evaporation pressure of a cold source loop is changed by monitoring the supercooled liquid temperature and feeding back and adjusting the opening degree of a pressure control valve, precise closed-loop control over the supercooled temperature is achieved, throttling flash gas can be remarkably reduced or even eliminated, the effective refrigerating capacity of unit refrigerant and the heat exchange efficiency of an evaporator are improved, and the system energy efficiency is greatly improved.

The application provides a control method, a control device and a heat pump system, and the control method comprises the following steps: obtaining the exhaust temperature of a compressor; determining whether the exhaust temperature of the compressor meets a first set temperature condition; obtaining the supercooling degree of the economizer; and adjusting the main electronic expansion valve and / or the auxiliary electronic expansion valve according to the interval range of the supercooling degree of the economizer. The application provides a control method, a control device and a heat pump system, and the supercooling degree of the economizer is detected and determined when the exhaust temperature is too high and needs to be inhibited, the supercooling degree of the economizer is detected, the auxiliary valve is adjusted while the main valve is closed, the supercooling degree of the economizer is increased, the air supplement is increased, and the exhaust temperature is reduced.

This refrigerator is provided with a refrigeration cycle, a sensor, and a control device. The refrigeration cycle has a circulation line, a first compression part, a middle stage part, a second compression part, an injection pipe, a supercooling heat exchanger, a supercooling expansion valve, a main expansion valve, an evaporator, a bypass pipe, and a bypass valve. The control device has: an acquisition part for acquiring a physical quantity related to the refrigeration cycle; a determination part for determining whether or not a supercooling degree of a refrigerant of the circulation line having passed through the supercooling heat exchanger is lower than a target value, on the basis of the physical quantity related to the refrigeration cycle; and a valve control part for controlling the bypass valve to open the bypass pipe, when the supercooling degree of the refrigerant of the circulation line having passed through the supercooling heat exchanger is lower than the target value.

The application provides a refrigerating machine, a refrigerating unit and a flue gas cooling system, and the refrigerating machine comprises a compressor, a separation assembly, a condenser, an evaporator and an economizer, the separation assembly comprises a first oil separator and a second oil separator connected in series, the air inlet of the first oil separator is connected with the air outlet of the compressor, the oil return outlet of the second oil separator is connected with the air inlet of the compressor, the condenser is connected with the separation assembly and located downstream of the separation assembly, the evaporator is connected with the compressor, the economizer comprises a first chamber and a second chamber, the inlet of the first chamber is connected with the refrigerant outlet of the condenser, the outlet of the first chamber is connected with the refrigerant inlet of the evaporator, the inlet of the second chamber is connected with the outlet of the first chamber, and the outlet of the second chamber is connected with the refrigerant inlet of the compressor. The refrigerating machine provided by the application can not only effectively reduce the oil running phenomenon, improve the operation efficiency and reliability, but also ensure the stability and adaptability of the system under variable working conditions.

To provide a heat exchanger suitable for a simpler assembly process that can be semi-automated or fully automated. A heat exchanger for a cryogenic cooling device is provided having a first conduit, a second conduit, and a chamber, the chamber being positioned to receive a fluid from the first conduit, the second conduit being thermally coupled to an exterior of the chamber, the chamber having a first region and a second region, the first region being separated from the second region by a plate extending through the chamber, the plate including one or more openings that permit flow of the fluid from the first region to the second region.

Disclosed in the present application are a control method for a heat pump system, and a heat pump system. The heat pump system comprises a compressor, a condenser, an economizer and an evaporator, wherein the condenser comprises a first refrigerant channel and a water channel; and the economizer comprises a second refrigerant channel and a third refrigerant channel. The control method comprises: starting a compressor, and regulating, to a preset flow rate, both the flow rate of a refrigerant which enters a third refrigerant channel and the flow rate of a refrigerant which enters an evaporator; acquiring the water output temperature and a set temperature value of a water channel of a condenser; and on the basis of the water output temperature and the set temperature value, controlling the rotational speed of the compressor, such that the water output temperature approaches the set temperature value. The rotational speed of a compressor is controlled by using a water output temperature and a set temperature value, so that the heat pump system promptly responds to changes in the water output temperature, thereby improving the accuracy of regulating the water output temperature, thus achieving a quick response to the requirements of users for the water output temperature, and improving the user experience.

The present invention is provided with: a plurality of heat exchange units, each of which is connected to a lower header on the underside and includes a refrigerant inlet / outlet tube whereby a refrigerant in an external refrigerant tube can flow in / out; and a connection tube which connects a heat exchange unit serving as a main heat exchange unit that exchanges heat between air and the refrigerant and that condenses the refrigerant and a heat exchange unit serving as a supercooling heat exchange unit that exchanges heat between air and the refrigerant passing through the main heat exchange unit and that supercools the refrigerant passing through the main heat exchange unit. The supercooling heat exchange unit includes a non-connection region where a heat transfer tube is not connected to one end on the top surface of the lower header. The refrigerant inlet / outlet tube is connected to the non-connection region. The refrigerant inlet / outlet tube on the refrigerant outflow side of the main heat exchange unit and the refrigerant inlet / outlet tube on the refrigerant inflow side of the supercooling heat exchange unit can be connected by the connection tube when condensation occurs on the main heat exchange unit.

Vehicle air conditioning unit with: a compressor (21) configured to compress and discharge a refrigerant; a radiator (15) configured to emit heat from the refrigerant; a heat exchanger (14) configured to absorb the heat in the refrigerant; an external heat exchanger (22) configured to release heat from the refrigerant or to absorb heat in the refrigerant; a first expansion valve (24) configured to expand the refrigerant flowing into the external heat exchanger (22); a second expansion valve (28) configured to expand the refrigerant flowing into the heat exchanger (14); a collector (30) configured to separate the refrigerant into a gas and a liquid and to allow the refrigerant to be drawn into the compressor (21), wherein the collector is provided in a refrigerant flow channel to a suction side of the compressor (21) into which the refrigerant is drawn; a heating refrigerant circuit (20a-20b-20c-20d-20e) configured to allow the refrigerant discharged by the compressor (21) to flow into the radiator (15) and release heat in the radiator (15), to allow the refrigerant flowing through the radiator (15) to flow into the outdoor heat exchanger (22) through the first expansion valve (24) and absorb the heat in the outdoor heat exchanger (22), and to allow the refrigerant flowing through the outdoor heat exchanger (22) to be drawn into the compressor (21) through the manifold; a heating and dehumidifying refrigerant circuit (20a-20b-20c-20e, 20a-20b-20f-20g-20h-20i-20e) configured to allow the refrigerant discharged by the compressor (21) to flow into the radiator (15) and release heat in the radiator (15), to allow a portion of the refrigerant that has flowed through the radiator (15) to flow into the outdoor heat exchanger (22) through the first expansion valve (24) and absorb heat in the outdoor heat exchanger (22), to allow the remaining refrigerant that has flowed through the radiator (15) to flow into the heat exchanger (14) through the second expansion valve (28) and absorb heat in the heat exchanger (14), and to allow the refrigerant that has flowed through the The air has flowed through the external heat exchanger (22) and the heat exchanger (14), and is drawn into the compressor (21) through the collector; a third expansion valve (25) configured to expand the refrigerant flowing from the radiator (15) into the heating refrigerant circuit and the heating and dehumidifying refrigerant circuit; a gas / liquid separator (29) configured to separate the refrigerant expanded through the third expansion valve (25) into a gaseous refrigerant and a liquid refrigerant; and a bypass circuit (20k) configured to allow at least some of the gaseous refrigerant separated in the gas / liquid separator to flow into a section of the compressor (21) through which the compressed refrigerant flows; and a fourth expansion valve (31) configured to expand the refrigerant flowing through the bypass circuit; and a valve opening control device configured to control the opening of the third expansion valve (25) such that the degree of subcooling of the refrigerant in the radiator (15) becomes a predetermined value, and to control the opening of the fourth expansion valve (31) such that the quantity of refrigerant flowing through the bypass circuit becomes a predetermined value.

A circulating process device (10), in particular a heat pump, which is designed to allow a refrigerant to circulate in it, comprising: a first evaporator (11) for converting the refrigerant into a gaseous state, which is arranged in a first evaporator section (V1), a second evaporator (12) which is arranged in a second evaporator section (V2) parallel to the first evaporator section (V1), and at least one pressure control unit (13) which is designed to set a lower pressure in the first evaporator section (V1) than in the second evaporator section (V2).

A brazed plate heat exchanger (100) including a plurality of first and second heat exchanger plates (110, 120), wherein the first heat exchanger plates (110) are formed with a first pattern of ridges (R1) and grooves (G1), and the second heat exchanger plates (120) are formed with a second pattern of ridges (R2a, R2b) and grooves (G2a, G2b) providing contact points between at least some crossing ridges and grooves of neighbouring plates under formation of interplate flow channels for fluids to exchange heat, said interplate flow channels being in selective fluid communication port openings (O1, O2, O3, O4). The first pattern of ridges and grooves is different from the second pattern of ridges and grooves, so that an interplate flow channel volume on one side of the first heat exchanger plates (110) is different from the interplate flow channel volume on the opposite side of the first heat exchanger plates (110). The heat exchanger (100) is provided with a retrofit port heat exchanger (400). A system and a method are also disclosed.

A vehicle thermal management device and a vehicle thermal management system therein may comprise: a radiator (227) configured to perform heat exchange between a coolant and air, a condenser (140) configured to perform heat exchange between a refrigerant and air, and a receiver-dryer (150) configured to remove moisture from the refrigerant discharged by the condenser (140), wherein the receiver-dryer (150) is configured to separate liquid refrigerant from gaseous refrigerant, and a heat exchange module (240) connected to the radiator (227) to allow the coolant to move between them, wherein the heat exchange module (240) is configured toselectively perform a heat exchange between the refrigerant in the receiver-dryer (150) and the coolant supplied by the radiator (227).

The invention relates to a method for conditioning air in a temperature-insulated test chamber that can be sealed off from the environment, and to a test chamber, in particular a climate chamber, for holding test specimens, wherein a temperature control device of the test chamber, comprising a cooling circuit (11) with carbon dioxide as a refrigerant, a heat exchanger (12) in the test chamber, a low-pressure compressor (13) and a high-pressure compressor (14) following the low-pressure compressor in the direction of refrigerant flow, a gas cooler (15) and an expansion valve (16), is used to establish a temperature within a range of -40 °C to +18 °C within the test chamber, wherein the temperature in the test chamber is controlled and / or regulated by means of a control device of the test chamber, and wherein the cooling circuit has a valve assembly (17).by means of the refrigerant, which is directed to the low-pressure compressor or to the high-pressure compressor.

A method is provided. The method comprises: identifying, by a processing device, first temperature data indicative of a temperature difference between a bulk fluid at a first inlet of a heat exchanger and the bulk fluid at a first outlet of the heat exchanger, fluidly coupled to the first inlet by one or more fluid channels of the heat exchanger, wherein the first outlet of the heat exchanger is fluidly coupled to a high-pressure inlet of a pressure exchanger (PX); determining, based on the first temperature data, a target adjustment of a first valve fluidly coupled to the first outlet of the heat exchanger and to a secondary fluid inlet of the heat exchanger; and causing, based on the target adjustment, actuation of the first valve.

The application discloses a condenser with liquid level self-control throttling and a use method, and relates to the technical field of refrigeration, in particular to a condenser with liquid level self-control throttling. The condenser comprises a condenser cylinder, an air inlet and a liquid outlet are arranged on the condenser cylinder, condensing heat exchange pipes for cooling and liquefying the air inlet are arranged in the condenser cylinder, and a supercooling heat exchange pipe for forming supercooled refrigerant by performing secondary heat exchange on the liquid refrigerant is arranged at the lower part of the cylinder. A liquid level self-control throttling mechanism for keeping the liquid level of the liquid refrigerant covering the supercooling heat exchange pipe and throttling the liquid outlet is arranged at the liquid outlet. The liquid level self-control throttling mechanism can make the liquid level of the liquid refrigerant cover the supercooling heat exchange pipe, the refrigerant has a certain supercooling degree before flowing out of the condenser, the throttling function can be realized, and the stable and efficient operation of the refrigeration system is ensured.

The application discloses an air conditioner and a controller, a control method and a computer readable storage medium thereof, and the method comprises the following steps: when the air conditioner is in a refrigeration mode, the refrigerant circulation amount of the air conditioner is acquired; the first target supercooling degree of a second heat exchanger is acquired according to the refrigerant circulation amount; the current target supercooling degree and the superheating degree of the second heat exchanger are acquired; if the first target supercooling degree is less than or equal to the current target supercooling degree, and the superheating degree is less than or equal to the superheating degree threshold, the current target supercooling degree is updated to the first target supercooling degree. Therefore, the target supercooling degree is updated by the refrigerant circulation amount to inhibit the refrigerant flow into the indoor unit from being too low due to excessive supercooling degree, so that the poor refrigeration effect and the refrigeration efficiency decline of the air conditioner are avoided.

The present disclosure relates to the technical field of air conditioners, and discloses a gas supplementing and enthalpy increasing system, a control method and device thereof, and an air conditioner. The outlet of a compressor, the first interface of an indoor unit, the first interface of a condenser, and the inlet of a gas-liquid separator are respectively connected with corresponding valve ports in a four-way valve. The first main port and the first auxiliary port of an economizer are both connected with the second interface of the condenser, the second main port of the economizer is connected with the second interface of the indoor unit, the second auxiliary port of the economizer is connected with the inlet of the gas-liquid separator, and the branch in which the first auxiliary port is located is provided with a first electronic valve. The outlet of the gas-liquid separator is connected with the inlet of the compressor through a first liquid outlet branch and a second liquid outlet branch, and the second liquid outlet branch is provided with a second electronic valve. The first main port is provided with a first temperature sensor, the second main port is provided with a second temperature sensor, and the outlet of the compressor is provided with a high-pressure pressure sensor. The above-mentioned gas supplementing and enthalpy increasing system can improve the stability of air conditioner operation.

A compressor (12) for a cryocooler (10) includes an air-cooled heat exchanger (26) that includes a cooling fan (50) and a first oil line (46) disposed to be forcibly cooled by the cooling fan (50) and a second oil line (48) that bypasses the first oil line (46). The second oil line (48) may be disposed to be forcibly cooled by the cooling fan (50).

Generally, an atmospheric water harvesting system useful in harvesting water from surrounding air. Specifically, a water harvester including a secondary heat exchanger operable in a first mode of the water harvester to absorb heat from the ambient environment to reduce the sensible heat penalty associated with increasing temperature to initiate desorption of water from a water capture material and in particular embodiments operable in a second mode of the water harvester to transfer heat from the desorbed water to the ambient environment.

An air conditioner may include: a compressor; a flow path switching valve; a first flow path connecting an outlet of the compressor to the flow path switching valve; a first heat exchanger; a second flow path connecting the first heat exchanger to the flow path switching valve; a first refrigerant port fluidly connected to an indoor unit; a third flow path extending from the first heat exchanger to the first refrigerant port; a sub-cooler provided on the third flow path; a first expansion valve provided between the first heat exchanger and the sub-cooler on the third flow path; a second expansion valve provided between the sub-cooler and the first refrigerant port on the third flow path; a fourth flow path branched from a branch point of the third flow path, passing through the sub-cooler, and extending to an inlet of the compressor; a third expansion valve provided between the sub-cooler and the branch point on the fourth flow path; a second refrigerant port fluidly connected to the indoor unit; a fifth flow path connecting the second refrigerant port to the flow path switching valve; and a sixth flow path connecting the flow path switching valve to an intake port of the compressor.

The application relates to the technical field of automobile heat exchange, and discloses an economic heat exchanger for an automobile, which comprises a flow guide component, a heat exchange component and an adsorption component, the heat exchange component comprises an inner flow channel pipe, an outer flow channel pipe, a partition net and heat-conducting sand, the inner flow channel pipe is attached to the outer flow channel pipe, the outer flow channel pipe is internally provided with the partition net, the outer flow channel pipe is divided into at least one constraint cavity through the partition net, a plurality of heat-conducting sands are filled in the constraint cavity, the heat-conducting sand is made of a magnetic material, and a magnetic block is movably arranged outside the outer flow channel pipe. The magnetic block moves with the adsorbed heat-conducting sand, when the magnetic block moves to a side of the partition net far from the constraint cavity, the magnetic force of the magnetic block cannot support the heat-conducting sand, the heat-conducting sand flows in the constraint cavity along gaseous or liquid refrigerant, the flowing heat-conducting sand is used as a heat-conducting medium, the heat-conducting efficiency of the refrigerant is improved, and the heat exchange between the refrigerant and the outer flow channel pipe can be more efficient.

A vehicle air conditioning apparatus includes: a refrigerant circuit including a compressor configured to compress refrigerant, an outdoor heat exchanger configured to perform a heat exchange between the refrigerant and outdoor air, and a heat absorption heat exchanger configured to absorb heat from a heat-absorbed subject into the refrigerant; and a controller configured to control the refrigerant circuit. The controller can selectively perform defrosting modes including: a hot gas defrosting mode to defrost the outdoor heat exchanger by the refrigerant compressed by the compressor; and a heat absorption defrosting mode to defrost the outdoor heat exchanger by the refrigerant absorbing the heat from the heat-absorbed subject and compressed by the compressor. The controller sets a selecting condition to preferentially select the heat absorption defrosting mode, and a switching condition to switch the heat absorption defrosting mode to the hot gas defrosting mode and performs the hot gas defrosting mode.

A regional heating installation (100) comprising: a heating system (110) for heating a primary fluid, comprising:-at least one heat pump module (1) comprising: a first circuit (2) for a first refrigerant fluid and a second circuit (3) for a second refrigerant fluid; a first heat exchanger (4) arranged on the first circuit (2) for heat exchange between the first refrigerant fluid and the first heat transfer fluid; a first compressor (5) arranged on the first circuit (2) downstream of the first heat exchanger (4); a second heat exchanger (6) interposed between the first circuit (2) and the second circuit (3) for heat exchange between the first refrigerant fluid and the second refrigerant fluid, said second heat exchanger (6) being located on the first circuit (2) downstream of the first compressor (5); a first expansion valve (7) arranged on the first circuit (2) downstream of the second heat exchanger (6); a second compressor (8) arranged on the second circuit (3) downstream of the second heat exchanger (6); a third heat exchanger (9) arranged on the second circuit (3) downstream of the second compressor (8) for heat exchange between the second refrigerant fluid and the second heat transfer fluid; -a heat exchange device (101), said device (101) being operatively associated with at least a second heat transfer fluid; and a distribution network (120) for distributing the primary fluid to the plurality of users.