1446results about "Compression machines with reversible cycle" patented technology

A ventilation system including a ventilator; and an outdoor unit, wherein the ventilator includes a housing including a first intake, a second intake, a first outlet and a second outlet, a plurality of dampers to change flow paths of air flowing through the housing, first and second air blowers, a heat exchanger in the housing, and a processor to control the dampers and first and second air blowers to form a first flow path in which outside air flows through the heat exchanger, or form a second flow path in which room air flows through the heat exchanger, to thereby form a flow path in the ventilator, while air flows through the flow path, control the outdoor unit to form frost on the heat exchanger, and control the outdoor unit to stop operating based on a preset frosting termination condition so that the frost melts to clean the heat exchanger.

The present application relates to the technical field of air conditioners, and particularly relates to an air conditioner control method and device, a multi-connected air conditioner and a storage medium, the present application determines the target heat recovery mode of the multi-connected air conditioner by judging the water tank temperature of the hot water tank, the heating energy demand and the total energy demand of each air conditioner indoor unit obtained when the multi-connected air conditioner simultaneously exists refrigeration and heating water demand, and then adjusts the communication state of the reversing device and the throttling element according to the target heat recovery mode, so as to achieve the purpose of simultaneously operating refrigeration and heating water by one heat pump system, and heat the water tank by the waste heat of air conditioner refrigeration, thereby avoiding the technical problem that the heating and heating water in the prior art multi-connected air conditioner are not simultaneously performed, and improving the use experience of the user.

The present invention relates to a refrigerant circuit, in particular a refrigerant circuit for a heat pump, and to a heat pump for heating and cooling a building. The refrigerant circuit comprises a first heat exchanger (8) configured to function as an evaporator or as a condenser, and a second heat exchanger (7) also configured to function as a condenser or as an evaporator.The refrigerant circuit further comprises a compression section (90) located downstream of the first heat exchanger (8) or downstream of the second heat exchanger (7), an expansion section (20) located downstream of the second heat exchanger (8) or downstream of the first heat exchanger (7), a first directional control valve (3) configured to supply refrigerant to the expansion section (20) and to discharge refrigerant from the expansion section (20), and a second directional control valve (4) configured to supply refrigerant to the compression section (90) and to discharge refrigerant from the compression section (90).

To reduce heat exchangers having different functions from being thermally affected by each other, and to respond to a desired temperature requirement for a temperature adjustment target. Provided is a refrigerant unit 10 including a refrigerant circuit and a single support member 12 that collectively supports components of the refrigerant circuit. The refrigerant circuit includes a first heat exchanger 30 and second heat exchangers 41, 42 having different functions. The first heat exchanger is disposed between the plurality of the second heat exchangers. A distance from one side of the plurality of second heat exchangers to the first heat exchanger is greater than a distance from the other side of the plurality of second heat exchangers to the first heat exchanger.

Disclosed is a flow path switching device including: a case including a first nozzle into which fluid is introduced, a second nozzle through which fluid is discharged, a plurality of inner outflow pipes through which fluid supplied from the first nozzle flows, a plurality of inner inflow pipes through which the fluid supplied to the second nozzle flows, and a flow path connection portion in which a space is formed to communicate the plurality of inner outflow pipes with the first nozzle or to communicate the plurality of inner inflow pipes with the second nozzle; a valve rotatably disposed in the space of the flow path connection portion, and having a first chamber connecting one of the plurality of inner inflow pipes and the first nozzle according to placement, and a second chamber connecting one of the plurality of inner outflow pipes and the second nozzle; and a motor disposed in one side of the valve and rotating the valve. Each of the first nozzle, the inner outflow pipe, and the flow path connection portion forms a flow path perpendicular to each other inside. A first chamber hole connecting the first chamber and a nozzle flow path formed inside the first nozzle is formed in the valve. A cross-sectional area of the nozzle flow path is reduced to a size corresponding to the first chamber hole from an inlet portion of the first nozzle towards the flow connection portion.

The invention provides an air source heat pump system. The air source heat pump system comprises a compressor, a fin heat exchanger, a shell tube heat exchanger and a gas-liquid separator, wherein the shell tube heat exchanger comprises a gas tube, a liquid tube, a heat exchange tube and a liquid separating device, the air source heat pump system further comprises a four-way valve, the four-way valve is correspondingly communication with the compressor, the gas-liquid separator, the fin heat exchanger and the gas pipe, the fin heat exchanger is in communication with the liquid separating device through a orifice plate and a first one-way valve; the fin heat exchanger is in communication with the liquid tube through an expansion valve and a second one-way valve; the first one-way valve is used for the one-way conduction of the fin heat exchanger to the liquid separating device; the second one-way valve is used for the one-way conduction of the liquid pipe to the fin heat exchanger. By the adoption of the system, a liquid storage device of the liquid refrigerant does not need to be added in the system, so that the cost is saved; a large amount of liquid refrigerant cannot flow back to the compressor after defrosting is finished; during the refrigeration mode, the refrigerant running shell pass does not need to be subjected to suction superheat, so that the air suction pressure and the operation efficiency of the refrigeration mode are improved; and the overall use valve of the system is less, and the reliability is high.

[Problem] Provision of a coolant circulation system that supplies a gaseous coolant to an engine where the degree of superheat is dampened to a low value. [Means of solution] Coolant circulation system S that circulates a coolant R to cool an engine 20 in a vehicle, wherein a control device 40 assumes a degree of superheat d of the coolant R exiting from secondary heat exchangers 15a, 15b based on detection signals from sensors 30, wherein the control device 40 controls a flow rate in first expansion valves 14a, 14b such that the degree of superheat d is maintained within a predetermined range between a lower limit dt1, which is greater than zero, and an upper limit dt2, and the control device 40 supplies the coolant R from the secondary heat exchangers 15a, 15b to the engine 20 via a channel 3.

An assembly includes a fluid conditioning system including a cascade module and an active charge compensator integrated into the fluid conditioning system. The fluid conditioning system is transformable between a first mode and a second mode. In the first mode, the fluid conditioning system includes a first vapor compression loop and a second vapor compression loop. The first vapor compression loop and the second vapor compression loop are thermally coupled at the cascade module and the second vapor compression loop is fluidly separate from the first vapor compression loop. In the second mode, the fluid conditioning system includes a single vapor compression loop. The active charge compensator is operable to control a working fluid charge within the fluid conditioning system based on the mode of operation selected from the plurality of modes.

A refrigerant flow path module (40) includes a flow path unit (32) provided with a first refrigerant flow path (R1) and a second refrigerant flow path (R2) through which a refrigerant flows, and a casing (33) that accommodates the flow path unit (32), in which the flow path unit (32) is formed with a synthetic resin or a material containing aluminum as a main component, and the casing (33) is formed with a steel material.

An intelligent heat pump system autonomously manages thermal regulation in heating and cooling modes using real-time sensor data and adaptive control algorithms. The system comprises a heat pump integrated with components including a supply valve, regulating valve, return valve, and compressor expander, along with multiple sensors configured to monitor temperature and pressure conditions at various points, including the reservoir, cold side, and hot side. A removable memory stores a directive file containing operational parameters, including target temperatures, valve timing, and pressure control data. A control unit with a processor executes firmware modules that include sensor calibration routines, motor and valve control logic, and an adaptive algorithm that continuously compares real-time sensor input against target parameters. Based on deviations, the system dynamically adjusts component operations to regulate refrigerant flow, internal energy, temperature, and pressure, thereby driving the system toward a steady-state thermal condition. This autonomous system ensures efficient performance, enhanced temperature stability, and optimal energy usage across a range of varying environmental conditions.

A variable-frequency heat pump water heater (107), a control method therefor, an apparatus, and a storage medium. The variable-frequency heat pump water heater (107) is powered by a grid-connected photovoltaic power generation system. The control method comprises: acquiring the current operation state of the variable-frequency heat pump water heater (107); on the basis of the current operation state, determining a photovoltaic residual electricity consumption scheme of the photovoltaic power generation system; and on the basis of the photovoltaic residual electricity consumption scheme, controlling the variable-frequency heat pump water heater (107) to operate, the operation states of the variable-frequency heat pump water heater (107) at least comprising a first state in which heating is not started and a second state of heating on the basis of a compressor, and the types of the photovoltaic residual electricity consumption scheme at least comprising a first scheme corresponding to the first state and a second scheme corresponding to the second state.

The present invention relates to a safety device for a reversible heat pump device (10) with a refrigerant circuit coupled to a heat transfer circuit (20) via a first heat exchanger (13). The safety device comprises a first pressure switch for monitoring the pressure of a refrigerant in the refrigerant circuit of the heat pump device (10) and a temperature switch for monitoring the temperature of the refrigerant in the refrigerant circuit of the heat pump device (10). The first pressure switch comprises a first switch (S1) configured to open when the refrigerant pressure is less than a first predetermined pressure limit. The temperature switch comprises a second switch (S2) configured to open when the refrigerant temperature exceeds a predetermined temperature limit.The first switch (S1) is arranged in parallel to the second switch (S2), so that the power supply to the heat pump device (10) is interrupted if the first switch (S1) and the second switch (S2) are open.

An air conditioner includes an outdoor unit comprising a compressor and an outdoor heat exchanger, and an indoor unit connected to the outdoor unit and provided with an indoor heat exchanger. The indoor unit includes a first refrigerant flow tube connecting an inlet side of the indoor heat exchanger to the outdoor unit, a second refrigerant flow tube connecting an outlet side of the indoor heat exchanger to the outdoor unit, a first bypass tube branched from a first branch point of the first refrigerant flow tube and joined to a first joining point of the second refrigerant flow tube, a second bypass tube branched from a second branch point of the first refrigerant flow tube and joined to a second joining point of the second refrigerant flow tube, and a flow switching valve disposed between the first and second joining points of the second refrigerant flow tube.

A primary refrigerant circuit allows circulation of a primary refrigerant and includes a primary compressor, a cascade heat exchanger, and a primary heat exchanger. A secondary refrigerant circuit allows circulation of a secondary refrigerant and includes a secondary compressor, the cascade heat exchanger, and a utilization heat exchanger. The primary refrigerant circuit includes a first connecting pipe, a primary first connection pipe, and a liquid connecting pipe connecting the cascade heat exchanger and the primary heat exchanger, a primary suction flow path of the primary compressor, a primary subcooling circuit connecting the liquid connecting pipe and the primary suction flow path, and a primary subcooling expansion valve provided in the primary subcooling circuit.

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).

A heat source apparatus (1) includes: a cylinder (71) storing a flammable refrigerant and having, in a lower portion, a discharge port (71a) through which the flammable refrigerant is discharged; a casing (21) having a bottom plate (23) on which a compressor (12) and the cylinder are installed; and a restriction portion (80) configured to restrict a direction of displacement of the compressor when the heat source apparatus falls. In a top view with the heat source apparatus installed, a first straight line (L1) is defined as a straight line passing through a center of gravity (C1) of the compressor and a center of gravity (C2) of the cylinder. The restriction portion is configured to restrict the displacement of the compressor toward the cylinder to a direction deviating from the first straight line under a condition in which the first straight line is aligned with a direction of gravity.

A control method for a refrigeration cycle circuit allowing circulation of a working fluid containing a refrigerant component capable of undergoing a disproportionation reaction includes interrupting or limiting an operation of the refrigeration cycle circuit in response to detecting a sign of the disproportionation reaction based on at least one of a first state regarding a drive circuit for driving a compressor of the refrigeration cycle circuit or a second state regarding the working fluid.

The cooling device is configured to be used in a heating mode and a cooling mode, and includes a compressor (1), a plurality of user-side heat exchangers, an expansion mechanism (4), and a heat source-side heat exchanger (5) that are fluidly connected in series to form a cooling circuit. The cooling device also includes a first refrigerant pipe (6) extending from the compressor (1) to a first user-side heat exchanger (2) of the plurality of user-side heat exchangers, the first refrigerant pipe having a first valve (7) configured to at least fully open / close the first refrigerant pipe (6), and a second refrigerant pipe (8) extending from the compressor (1) to a second user-side heat exchanger (3.1, 3.2, 3.3) of the plurality of user-side heat exchangers, the second refrigerant pipe having a second valve (9) configured to at least fully open / close the second refrigerant pipe (8). The cooling device further includes a controller configured to control the operation of the first valve (7) and the second valve (9). When the cooling device is used in a heating mode, and both the first user-side heat exchanger (2) and the second user-side heat exchanger (3.1, 3.2, 3.3) are operated, the controller is configured to compare a predetermined capacity of the heat source-side heat exchanger (5) and / or the compressor (1) with a required capacity of the first user-side heat exchanger (2) and the second user-side heat exchanger (3.1, 3.2, 3.3). The controller is configured to close the first valve (7) or the second valve (9) when the required capacity exceeds the predetermined capacity.

To provide a refrigeration cycle system that can suppress malfunctions of the four-way valve at low ambient temperatures. [Solution] The refrigeration cycle device comprises a four-way valve and a control unit. The four-way valve has a compressor, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger, and switches the direction of flow of the refrigerant that is circulated by the compressor in a refrigerant circuit and connected to the refrigerant circuit. The control unit controls the compressor and switches between heating operation, in which the refrigerant is circulated in a heating cycle, cooling operation, in which the refrigerant is circulated in a cooling cycle with the opposite flow direction to the heating cycle, and defrosting operation, in which frost has formed on the outdoor heat exchanger due to heating operation is removed in the cooling cycle, by switching the four-way valve. When the control unit receives an operation stop signal and is performing defrosting operation, it stops the compressor after performing heating operation for a predetermined time or longer after the completion of defrosting operation.

A refrigerator is disclosed. The refrigerator may include a compressor which compresses a refrigerant; a condenser which condenses the refrigerant compressed by the compressor; a switching valve which is connected to an outlet of the condenser; an evaporator; a first flow path which connects one branched side of the switching valve to the evaporator; a defrosting heater for removing frost formed on the evaporator; a memory; and a processor. The processor controls the switching valve to shut off the first flow path if a defrosting start condition is satisfied while the refrigerant circulates through the first flow path, and operates the defrosting heater if a first condition is satisfied in a state while the first flow path is shut off.

A refrigerator includes a cooling circuit having a first flow path circulating a refrigerant connected in order of a compressor, a condenser, a capillary, and an evaporator, the cooling circuit including a hot gas bypass pipe provided to form a second flow path making the refrigerant compressed by the compressor flow from the compressor to the evaporator, a three-way valve provided in the first flow path between the compressor and the condenser and connected with the hot gas bypass pipe, and a two-way valve provided in the first flow path between the condenser and the capillary, the three-way valve being capable of making the refrigerant discharged from the compressor flow into the condenser or the hot gas bypass pipe, the two-way valve being capable of cutting off the flow of the refrigerant discharged from the condenser by being closed.

A radiation heat dissipation and radiation heat collection-based cold and hot central air conditioning system includes a compressor, a liquid storage device, an indoor unit and an outdoor unit connected in sequence, the outdoor unit includes a radiation heat collector; the radiation heat collector includes a protective plate, a heat absorption plate, and a plate core; the heat absorption plate is located between the plate core and the protective plate; the plate core comprises a heat exchange medium inlet end and a heat exchange medium outlet end; and the heat absorption plate is used for transferring absorbed heat to a heat exchange medium circulating in the plate core. The heat absorption plate collects heat, and then transfers the heat to the heat exchange medium flowing in the plate core; and the heat exchange medium carrying the heat is compressed by the compressor, and then enters the indoor unit for heat exchange.

The present application belongs to the technical field of mechanical design. Disclosed are a phase change heat pump system and a terminal device. The phase-change heat pump system comprises a reversing device, a first heat exchanger, a second heat exchanger, a compressor and a phase-change heat exchanger, wherein the compressor, the first heat exchanger and the second heat exchanger are in communication by means of the reversing device. The phase-change heat exchanger comprises a first box body and a phase-change material, wherein the first box body is filled with the phase-change material; and the phase-change heat exchanger is in contact and in thermal communication with the first heat exchanger. When the reversing device is in a first working state, an air suction port is in communication with the first heat exchanger, and an air discharge port is in communication with the second heat exchanger; and when the reversing device is in a second working state, the air suction port is in communication with the second heat exchanger, and the air discharge port is in communication with the first heat exchanger. By using the solution, the first heat exchanger can actively heat the phase-change material, such that, compared with the related art, the solution significantly shortens the regeneration time for the phase-change material, thereby being beneficial to improving the working efficiency of the phase-change heat pump system.

The invention discloses a photovoltaic energy storage and heat storage air energy hot water system without an external power supply, relates to the technical field of photovoltaic energy storage heat pump water heaters, and aims to charge an energy storage system when sunlight is sufficient, and directly provide electric power to operate a heat pump water heater system for heating when the energy storage system is nearly full. According to the heat pump system, through the reverse Carnot principle, heat in air is converted into a hot water tank by means of phase-change heat exchange of a refrigerating refrigerant, a full-free high-energy-efficiency hot water scheme is achieved, heating schemes such as an instant heating mode and an intelligent mode can be provided, the heat pump system adapts to various sunshine weather situations, maximum energy utilization is achieved, and the energy utilization rate is increased. And the domestic hot water requirement of outdoor operators is met.

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.

Disclosed are a method and device for controlling an air conditioner. The air conditioner includes an outdoor heat exchanger, an indoor heat exchanger, a heat storage heat exchanger, a compressor, a four-way valve assembly, and a throttling assembly, wherein the outdoor heat exchanger is connected to the indoor heat exchanger by means of a first pipeline and a bypass, the outdoor heat exchanger is connected to the compressor by means of a second pipeline, the indoor heat exchanger is connected to the compressor by means of a third pipeline, the heat storage heat exchanger is arranged on the bypass, the throttling assembly is arranged on the bypass, the four-way valve assembly includes a first four-way valve and a second four-way valve, the first four-way valve is arranged on the second pipeline, and the second four-way valve is arranged on the third pipeline.

The present specification relates to an embodiment of an air-conditioning system using a plurality of turbo compressors, wherein driving of the plurality of turbo compressors is switched according to operating conditions, and multiple injections are made into an internal heat exchanger, thereby circulating a refrigerant in response to the operating conditions.

The invention relates to the technical field of air conditioning equipment, in particular to an air conditioner outdoor unit, a control method thereof and an air conditioner. The air conditioner outdoor unit comprises outdoor heat exchangers, the outdoor heat exchangers comprise the first heat exchanger and the second heat exchanger, the first heat exchanger communicates with a compressor through a four-way valve, and the second heat exchanger communicates with an outdoor expansion valve. And a gas-liquid separation liquid storage device is communicated between the first heat exchanger and the second heat exchanger and is used for temporarily storing a refrigerant. According to the air conditioner outdoor unit, the control method of the air conditioner outdoor unit and the air conditioner, the actual refrigerant amount during refrigeration operation and heating operation can be closer to the reasonable refrigerant amount, and the problems of premature frosting and heating capacity reduction caused by insufficient refrigerant during heating operation can be solved; and the problems that the exhaust pressure is excessively increased and the power consumption is increased due to excessive refrigerants during refrigeration operation can be relieved.

No studies have been made regarding what kinds of refrigerants should be used in a refrigeration cycle device for a vehicle. An air conditioner (1) for a vehicle includes a refrigerant circuit (10) and a refrigerant that is sealed in the refrigerant circuit (10). The refrigerant circuit (10) includes a compressor (80), a first heat exchanger (85), which serves as a heat dissipater in a dehumidifying heating mode, an outside-air heat exchanger (82), a cooling control valve (87), and a second heat exchanger (86), which serves as an evaporator in the dehumidifying heating mode. The refrigerant is a refrigerant having a low GWP.

An air conditioning apparatus includes a pump flow regulating valves that are respectively provided for indoor heat exchangers, heat medium temperature detection units, and a control unit that controls the pump such that a heat medium at a predetermined flow rate circulates through a heat medium circuit, and controls the flow regulating valves such that a flow rate of a heat medium flowing through a largest load indoor heat exchanger becomes equal to a largest heat load target flow rate calculated based on a heat load on the largest heat load indoor heat exchanger and a flow rate of a heat medium flowing through a residual heat load indoor heat exchanger becomes equal to a residual heat load target flow rate calculated based on a heat load on the residual heat load indoor heat exchanger and a temperature of a heat medium flowing into the largest load indoor heat exchanger.