4686results about "Fluid circulation arrangement" patented technology

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.

To provide a valve capable of suppressing contamination from being caught between a fixed iron core and a rod. The valve includes: a valve housing; a valve body; a valve seat having the valve body seated thereon; a drive source for driving the valve body by a rod; and an urging member for urging the valve body in a direction opposite to a driving direction of the drive source. One of the valve body and the rod includes a guide concave portion which guides remaining one of the valve body and the rod in a relative fitting direction.

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.

The condensation pump type dilution refrigerating machine with the booster pump comprises the pre-cooling module and the dilution module, the pre-cooling module provides the required pre-cooling temperature for the dilution module, the dilution module uses the booster pump working at 1K, 3He circulation is achieved through cooperation of the booster pump and the condensation pump, no room-temperature circulation system is arranged, and therefore the dilution effect is good. And the defects of high heat loss and high compression power consumption in a room temperature circulation mode are overcome. Meanwhile, due to the fact that the booster pump is used, the system can obtain larger circulating flow so as to achieve larger cooling capacity, and the defect that a condensation pump type dilution refrigerator obtains large refrigerating power is overcome.

Module (M) for a stationary heat pump system comprising: at least one heat exchanger (W1, W2, W3). The at least one heat exchanger (W1, W2, W3) consists of interconnected plates arranged one above the other or side by side. A characteristic feature of the invention is that the module (M) has at least one connector (VWQ, VWV) for establishing a fluid-tight connection between the at least one heat exchanger (W1, W2, W3) and at least one heat source and / or at least one heat consumer. The module (M) also includes a compressor (KP) and an expansion valve (EV). A component (B) for a stationary heat pump system comprising at least one fourth heat exchanger (W4) and at least one module (M) according to the invention. The at least one fourth heat exchanger (W4) is a direct evaporator.

A flow direction control device of heating stream and cooling stream is prepared as connecting said device separately to the first heat exchange unit, the second heat exchange unit, air conditioner and compressor for controlling heated working fluid from the first heat exchange unit to be sent to air conditioner for being used as the first heat media or to be sent to the second heat exchanger for being condensed there then to send it to air conditioner for being used as the second cooling media in order to make air conditioner output hot and cold alternatively, enabling to set heating course on the first heat exchange unit for providing the third heat media out.

An air-conditioning apparatus includes configured to, during a heating-defrosting operation mode in which one of a first outdoor heat exchanger and a second outdoor heat exchanger connected in parallel with each other is defrosted as a target to be defrosted, compare a first condensing temperature obtained when the target to be defrosted is switched from one to the other with a second condensing temperature obtained when a normal heating operation mode in which the first outdoor heat exchanger and the second outdoor heat exchanger operate as evaporators is switched to the heating-defrosting operation mode, reduce, when the first condensing temperature is less than the second condensing temperature, an opening degree of a flow control device smaller than an initial opening degree, and increase, when the first condensing temperature is greater than the second condensing temperature, the opening degree larger than the initial opening degree.

A thermal management system for a vehicle includes a refrigerant circuit having an accumulator, a compressor, a refrigerant-air heat exchanger, a first expansion valve, and an evaporator. The thermal management system further including a heating system that is composed of a water pump, a coolant heater, and a heater core. The system further including a branch refrigerant line that is branched from a refrigerant line between the compressor and the refrigerant-air heat exchanger, a refrigerant-coolant heat exchanger wherein heat exchange is performed between a refrigerant and a coolant, a second expansion valve that is installed on the branch refrigerant line, and a first control valve installed at a branch point where the branch refrigerant line is branched from the refrigerant line between the compressor and the refrigerant-air heat exchanger.

The invention discloses a compressed air graded freeze-drying system which comprises a refrigeration compressor, a condenser, a refrigeration heat regenerator, a high-temperature evaporator, a low-temperature evaporator and an air heat regenerator, compressed air is pre-cooled through the air heat regenerator and then sequentially enters the high-temperature evaporator and the low-temperature evaporator to be freeze-dried, and then the compressed air enters the high-temperature evaporator and the low-temperature evaporator to be freeze-dried. And finally, rewarming is conducted through the air regenerator. The pressure dew-point temperature of the dried air is set through a dew-point temperature controller, when the outlet air temperature pressure dew-point temperature is higher than a set value, the driving frequency of a refrigeration compressor is increased, the system refrigerating capacity is increased, and the driving frequency of the refrigeration compressor is reduced, and the system refrigerating capacity is reduced; by introducing the high-temperature evaporator and the refrigeration compressor with the air supply function, the design difficulty of a single evaporator is reduced, the heat exchange efficiency is enhanced, stable control over a low-pressure dew point is facilitated, the compression work of a refrigerant is saved, and the operation energy efficiency of the compressed air freeze drying system is improved.

The present invention discloses an electronic expansion valve with a buffering effect, which includes a stator assembly and a valve seat assembly. The valve seat assembly is installed at the lower part of the stator assembly. The valve seat assembly includes an end cover assembly, a magnetic isolation tube, a valve needle assembly and a valve seat assembly. A lead screw assembly is arranged inside the magnetic isolation tube. The valve needle assembly includes a valve needle and a valve needle spring arranged in the inner hole at the lower end of the valve needle. The lower end of the valve needle is inserted with a valve needle head. A balance flow channel is opened in the middle of the valve needle head. A bushing is sleeved on the outer side of the upper part of the valve needle head. One end of the bushing abuts against the valve needle spring. A valve needle sleeve is arranged at the lower end of the bushing. A valve needle internal leakage O-ring is installed between the inner side of the valve needle sleeve and the valve needle head. The lead screw in the lead screw assembly axially inserts into the central threaded through hole of the valve needle. The present invention has a balance pressure function, a long service life, and a buffering effect when closing the valve, preventing the problem of thread jamming and unable to open the valve.

The air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a throttling assembly and a refrigerant circulation loop, and the refrigerant circulation loop is connected to the compressor, the indoor heat exchanger, the throttling assembly and the outdoor heat exchanger; the refrigerant circulation loop is connected to the compressor, the indoor heat exchanger, the throttling assembly and the outdoor heat exchanger; a main channel is arranged at one end of the distributor, a plurality of branch channels communicated with the main channel are arranged at the other end of the distributor, the main pipeline is connected to the main channel, and the flow dividing pipelines are connected to the branch channels; the distributor comprises an inner-layer pipe and an outer-layer pipe, the outer-layer pipe is provided with a plurality of outer flow guide holes distributed at intervals in the circumferential direction, and the inner-layer pipe and the outer-layer pipe can rotate between a first relative position and a second relative position. The air conditioner has the advantages of being even in refrigerant distribution, compact in structure, capable of improving heat exchange performance and the like.

An air conditioner includes a shutoff unit to shut off a flow of a refrigerant in refrigerant piping connecting an outdoor unit and an indoor unit together, a power storage unit to supply power to the shutoff unit in a case where supply of power from an external power source is shut off, a refrigerant leakage detection unit to detect a refrigerant leakage, and a power source shutoff detection unit to detect that the supply of power from the external power source is shut off. The shutoff unit includes a shutoff valve driven by a motor that shuts off the flow of the refrigerant and a valve control unit which controls an action of the shutoff valve. In a case where the refrigerant leakage is detected together with a power shutoff, the valve control unit blocks the shutoff valve and increases an action speed of the shutoff valve.

The invention relates to the technical field of air conditioners, particularly provides an air conditioning system and a control method thereof, and aims to solve the problems that condensation is easily generated and the temperature is too high to facilitate heat dissipation in an existing refrigerant heat dissipation mode. In order to achieve the purpose, the air conditioning system comprises an outdoor heat exchanger, a control valve, a refrigerant radiator, a throttling element and an indoor heat exchanger which are sequentially connected. The refrigerant radiator is used for radiating a driving module of the air conditioning system; the air conditioning system further comprises a first temperature detection piece which is arranged on the side, close to the control valve, of the refrigerant radiator and used for detecting the temperature of the refrigerant flowing to the refrigerant radiator or flowing out of the refrigerant radiator. The opening degree of the control valve is adjusted in the refrigeration mode, the opening degree of the throttling element is adjusted in the heating mode, and the temperature of the throttling element and the control valve is controlled in the defrosting mode, so that the temperature is higher than the dew point temperature and lower than the temperature of the driving module; therefore, the driving module can be cooled, and condensation can be avoided.

The invention relates to the technical field of refrigeration, in particular to a heat exchange device and an air conditioning system. The heat exchange device comprises a shell assembly, a refrigerant assembly and a partition assembly, an air inlet and an air outlet are formed in the shell assembly, an airflow cavity arranged in the first direction is formed in the shell assembly and communicates with the air inlet and the air outlet, and the first direction is the direction from the air inlet to the air outlet; the refrigerant assembly comprises a plurality of refrigerant pipelines arranged in the airflow cavity in a penetrating mode, the separation assembly is arranged in the airflow cavity and divides the airflow cavity into at least two airflow channels which are separated from each other, the refrigerant pipelines are arranged in each airflow channel, and the number of the refrigerant pipelines in any two airflow channels is different. According to the heat exchange device in the embodiment, the airflow cavity is divided into the multiple independent airflow channels through the separation assemblies, disordered flowing of airflow in the heat exchange device is avoided, and therefore the contact efficiency of the airflow and the refrigerant pipeline is improved.

The utility model relates to the technical field of regional comprehensive energy utilization, and in particular to a carbon dioxide cycle energy comprehensive utilization system, including: a low-pressure storage tank for storing low-pressure liquid carbon dioxide; a compressor connected to the outlet of the low-pressure storage tank; a cooler arranged downstream of the compressor; a high-pressure storage tank arranged downstream of the cooler for storing high-pressure liquid carbon dioxide; an expander arranged downstream of the high-pressure storage tank, the expander is connected to a generator for generating electricity during the expansion of carbon dioxide, and the expanded low-pressure liquid carbon dioxide returns to the low-pressure storage tank; the cooler is connected to a water circulation flow path, and the cold water is used to cool the compressed carbon dioxide and generate hot water. The utility model is used to solve the defects of low efficiency or safety of the energy utilization system in the industrial park, and realize a safe and reliable energy efficient utilization plan.

The invention discloses a two-section compression type transcritical carbon dioxide heat pump system and a control method thereof. An outlet of a second compressor sequentially passes through a high-temperature heat exchanger and a flow divider and then is divided into two paths; wherein one path is communicated with an inlet of a first expansion machine through a heat flow stream inlet valve of the first heat regenerator, the hot side of the first heat regenerator and the hot side of the second heat regenerator, and the other path is communicated with an inlet of a second expansion machine through a heat flow stream inlet valve of the third heat regenerator and the hot side of the third heat regenerator in sequence; the outlet of the second expansion machine is communicated with the inlet of the mixer through the cold side of the second heat regenerator, the cold stream inlet valve of the first heat regenerator and the cold side of the second heat regenerator in sequence; an outlet of the first expansion machine communicates with an inlet of the mixer through the low-temperature heat exchanger, a cold stream inlet valve of the third heat regenerator, the cold side of the third heat regenerator and the first compressor, an outlet of the mixer communicates with an inlet of the second compressor, and the comprehensive energy efficiency of the carbon dioxide heat pump system can be improved.

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 present invention relates to a refrigerant manifold applied to a cooling module applied to a vehicle cooling system. According to the refrigerant manifold of the present invention, by forming a hole or a slit in a middle plate and a housing of parts to which in / out ports are connected or parts to which in / out pipes are connected to discharge a leaked fluid to the outside when leakage occurs inside a manifold, it is possible to increase the accuracy of a leakage test.

The invention relates to the technical field of air conditioners, in particular to a valve box, an air conditioning system and a refrigerant leakage control method, and aims to solve the problems that an existing valve box is inconvenient to mount, and when the air conditioning system needs more valve boxes, the construction progress is affected. In order to achieve the purpose, the valve box comprises a box body, at least one liquid pipe assembly and at least one air pipe assembly, the liquid pipe assemblies and the air pipe assemblies are arranged on the box body, and the liquid pipe assemblies are connected with a liquid pipe of the air conditioning system and used for controlling on-off of a liquid path between an outdoor unit and an indoor unit of the air conditioning system; the air pipe assembly is connected with an air pipe of the air conditioning system and used for controlling on-off of an air path of the outdoor unit and an air path of the indoor unit. According to the valve box, the liquid pipe assembly and the air pipe assembly are arranged on the box body, then the liquid pipe assembly is connected with the liquid pipe of the air conditioner system, the air pipe assembly is connected with the air pipe of the air conditioner system, installation of the valve box can be completed, the installation process is more convenient, and therefore the installation efficiency of the whole air conditioner system can be 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 hydraulic module (10) and a heat pump system. The hydraulic module (10) comprises an expansion vessel (200), a heat exchange device (300), a water tank (400) and a water pump (500); the expansion vessel (200) is provided with an expansion port (210); the heat exchange device (300) is provided with a first water inlet (310a) and a first water outlet (320a); the water tank (400) is provided with a second water inlet (410a) and a second water outlet (420a); the water pump (500) is provided with a water pumping end (510). In the direction of gravity (G), the water pump (500) is located below the water tank (400), the expansion vessel (200) is located above the heat exchange device (300), the expansion port (210) of the expansion vessel (200) is in communication with the first water inlet (310a), the first water inlet (310a) is lower than the first water outlet (320a), the first water outlet (320a) is in communication with the second water inlet (410a), the first water outlet (320a) is lower than the second water inlet (410a) or is even with the second water inlet (410a), the second water inlet (410a) is lower than the second water outlet (420a), and the second water outlet (420a) is in communication with the water pumping end (510) of the water pump (500).

The invention discloses a generator-condenser heat exchange coupled automatic cascade absorption type refrigeration cycle system. On the basis of an automatic cascade absorption refrigeration cycle, a non-azeotropic mixed refrigerant and an absorbent are adopted as working media. In the condenser, the mixed refrigerant can release a large amount of temperature slippage heat, the heat is effectively recycled by establishing a coupling heat exchange process between the generator and the condenser, the heating capacity of the generator in the system is reduced, and therefore the COP of circulation is improved. In addition, the system can adjust the refrigeration temperature by replacing the mixed refrigerant, the refrigeration temperature range can be from the room temperature to-100 DEG C or below, and the system has the advantage of being flexible in refrigeration temperature adjustment. Through reasonable arrangement of the generator-condenser coupling heat exchanger, the self-cascade absorption type refrigeration cycle configuration is optimized, the refrigeration efficiency is remarkably improved, the advantages of energy conservation and environmental protection are achieved, the wide refrigeration temperature adjusting range is provided, and the self-cascade absorption type refrigeration cycle system is suitable for various application scenes.

The air inlet and return pipe comprises an air inlet and return pipe body and end nuts connected to the two ends of the air inlet and return pipe body, the air inlet and return pipe body is of a bilateral symmetry structure, and internal threads are arranged on the inner circumferential surfaces of the end nuts connected to the two ends; the air inlet and return pipe body is of a double-layer structure, the outer layer is a woven mesh made of stainless steel, and the inner layer is a fluoroplastic hose. End supports are respectively arranged at the joints of the two ends of the air inlet and return pipe main body and the end nuts, and are used for connecting the air inlet and return pipe main body and the end nuts; the length of the end portions of the two sides of the fluoroplastic hose is slightly larger than that of the woven mesh, and a turnup structure is formed at the end supporting position so that a sealing structure can be formed when the end nut is in threaded connection with other parts, the flexibility of the air inlet and return pipe of the pulse tube refrigerator is guaranteed, vibration can be greatly reduced, meanwhile, gas flow resistance is reduced, and working efficiency and refrigerating capacity are improved.

A temperature control system, comprising a first heat exchanger, a second heat exchanger, a first bypass branch and a first valve, wherein a first interface of the first heat exchanger is in communication with a first interface of the second heat exchanger; an inlet of the first bypass branch is connected to the first interface of the first heat exchanger, and an outlet of the first bypass branch is in communication with a second interface of the second heat exchanger, such that a heat exchange medium of the first bypass branch and a heat exchange medium of the second interface of the second heat exchanger are mixed into a mixed-temperature heat exchange medium, and the mixed-temperature heat exchange medium flows into the second interface of the first heat exchanger; and the first valve can be used for adjusting the flow of the heat exchange medium of the first bypass branch. By means of the temperature control system, a first bypass branch is introduced so as to perform high-precision fine tuning on temperature, such that full use is made of heat which is wasted by a high-temperature heat exchange medium, thereby reducing a loss of the whole system, and facilitating energy saving.

A circulating loop for transporting refrigeration to a remote location is connected serially between a Gifford-McMahon (GM) or GM type Pulse Tube cold head and the compressor. Either high pressure gas from the compressor can flow through the remote heat station before returning to the cold head or low pressure gas can flow from the cold head to the remote heat station before returning to the compressor. A first fraction of gas, which may include all of the gas at ambient temperature, enters a counter-flow heat exchanger, is cooled by the cold head, flows to the remote load, and then returns to ambient temperature as it flows through the counter-flow heat exchanger. The high or low pressure line may have a circulation control valve that diverts a second fraction of gas to flow directly between the cold head and compressor. A controller adjusts the circulation control valve to optimize the cooling of the load.

A refrigerant circulation device is provided with: a primary flow path which is a flow path for a primary refrigerant; a secondary flow path, which is a flow path for a secondary refrigerant; a heat exchanger connected to the primary flow path and the secondary flow path; the pump is connected with the secondary flow path; and a frame body, wherein the frame body is provided with a storage area. The storage region expands in a first direction and a second direction that intersect each other, and has a longer dimension in the first direction than in the second direction. The housing houses the primary flow path, the secondary flow path, the heat exchanger, and the pump in a housing area. The entire heat exchanger is positioned closer to one side in the second direction than the pump.

The invention discloses a heat pump circulation system and a heat pump circulation control method. The heat pump circulating system comprises a compressor, a first condenser, a second condenser, an evaporator, an expansion valve, a first switch valve, a second switch valve and a third switch valve, and the compressor communicates with the first condenser through a first branch pipeline of a first pipeline and communicates with the second condenser through a second branch pipeline. The first condenser and the second condenser are connected in series through the second pipeline, the first switch valve is arranged on the first branch pipeline, the second switch valve is arranged on the second branch pipeline, and the third switch valve is arranged on the second pipeline. By controlling the on-off of the first switch valve, the second switch valve and the third switch valve, the heat pump circulation system has a primary heating mode in which only the second condenser participates in work and a secondary heating mode in which the first condenser and the second condenser work simultaneously, so that the heat exchange efficiency of the condensers is improved.

According to the pipeline integration module, the outdoor unit and the heating and ventilation equipment, a containing cavity used for containing fluid is defined by covering a first plate body and a second plate body, a turning-connection opening communicating with the containing cavity is defined by arranging a turned-over edge, and the wall face of the defined containing cavity comprises a transition convex arc face; the wall surface defining the transfer opening comprises a turnup wall surface, the transition convex arc surface is connected with the turnup wall surface, and the part, inserted into the transfer opening, of the transfer pipe does not completely exceed the transition convex arc surface in the direction from the turnup wall surface to the transition convex arc surface, so that the transfer pipe does not stretch into the containing cavity, and the interference on fluid flowing in the containing cavity is small; the flow resistance generated by the adapter pipe in the containing cavity can be reduced, the adapter pipe can be in smooth transition with the transition convex cambered surface at the pipe opening, a gap can be prevented from being formed between the adapter pipe and the wall face of the containing cavity, then fluid in the containing cavity is prevented from generating vortex during flowing, and the flow resistance generated by the adapter pipe in the containing cavity is further reduced.

The utility model relates to the field of cold and heat pump units, in particular to a multifunctional efficient defrosting evaporation cold and heat pump unit which comprises a compressor, and an outlet of the compressor is respectively connected with an inlet of a shell and tube heat exchanger and an inlet of an evaporation cold heat exchanger through a four-way reversing valve. An outlet of the evaporation cold heat exchanger is connected with an inlet of the compressor and an outlet of the shell-tube heat exchanger through electronic expansion valves. An outlet of the shell-tube heat exchanger is connected with an inlet of the compressor and the fin type heat exchanger set through the electronic expansion valve. The fin type heat exchanger set comprises at least two sets of heat exchange channels which are mutually independent, each heat exchange channel is formed by connecting a three-way valve, a fin type heat exchanger and a one-way valve in series, and the three-way valve is connected with an inlet and an outlet of the compressor. The utility model provides a multifunctional efficient defrosting evaporation cold and heat pump unit, which can realize three functions of efficient refrigeration, heating and continuous defrosting while heating.

The invention discloses a robot series liquid cooling circulation system based on magnetic refrigeration. The system comprises a plurality of liquid cooling cavity channels, a magnetic refrigeration device, an air cooling device and cold liquid; the liquid cooling cavities are arranged at the positions of heat sources on the robot and used for cooling the positions of the heat sources, and at least part of the liquid cooling cavities are arranged in series; the cold liquid is filled in the liquid cooling cavity channel; the magnetic refrigeration device is connected and conducted with the liquid cooling cavity channel and at least cools the cold liquid; and the air cooling device is connected and conducted with the magnetic refrigeration device to discharge heat for the magnetic refrigeration device. According to the liquid cooling circulation system, part of the liquid cooling cavities are connected in series, so that a liquid cooling network is relatively simple, fewer liquid pumps are adopted, and the cost is low.