2714results about "Compression machines with reversible cycle" patented technology

The invention provides an air source heat pump heating method and system, and relates to the technical field of heat pump system thermal control, and the method comprises the steps: collecting evaporator surface frost layer thickness, environment temperature and humidity parameters in real time, inputting the parameters to a pre-trained neural network algorithm model, and identifying a frosting rate by analyzing a multi-factor nonlinear relation; predicting a future frosting development trend, and outputting frosting thickness increase prediction and severity degree results; and according to the frosting thickness increase prediction and the severity degree result, reverse circulation defrosting is started in advance when the frost layer does not reach the critical thickness, and optimal control over the defrosting process is achieved by adjusting the opening degree of the four-way valve and the rotating speed of the draught fan, so that the system state after defrosting is obtained. The energy efficiency of the system is improved, and the heating comfort is optimized.

The invention provides a constant-heating defrosting system of a heat recovery air conditioner and a defrosting control method and device. According to the system, a compressor, a first electromagnetic valve, a water tank, a first expansion valve, a first one-way valve, a second electromagnetic valve, an outdoor heat exchanger and a four-way valve are connected to form a first heating loop; a compressor, a first electromagnetic valve, a water tank, a first expansion valve, a first one-way valve, a third electromagnetic valve, an energy storage water tank, a fourth electromagnetic valve and a four-way valve are connected to form a first defrosting loop. A compressor, a fifth electromagnetic valve, a second one-way valve, an outdoor heat exchanger and a four-way valve are connected to form a second defrosting loop; and the first heating loop, the first defrosting loop and the second defrosting loop form a single heating water defrosting loop. The problem that in the prior art, in the defrosting process, the comfort experience of a user is affected due to the fact that an air conditioner does not conduct heating is solved.

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 utility model provides an air conditioner and hot water integrated system with temperature control and dehumidification functions, which comprises a compressor, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a water tank and a liquid storage device, the other end of the second indoor heat exchanger communicates with one end of the first indoor heat exchanger, and the other end of the outdoor heat exchanger, the other end of the first indoor heat exchanger and the other end of the water tank communicate with the interior of the liquid storage device. The air suction end of the compressor can communicate with one end of the outdoor heat exchanger or one end of the second indoor heat exchanger or one end of the water tank. According to the utility model, the modes of refrigeration and water heating, heating and water heating and dehumidification and water heating can be realized at the same time, the system can also adapt to the refrigerant circulation amount in different modes, the problem of high power consumption is solved, the problem that the requirement of comfort cannot be met is solved, and the system runs efficiently.

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 utility model discloses a heat pump device and an air conditioning system, and relates to the technical field of heat exchange. The air conditioner comprises an outdoor assembly, an inner machine assembly, a liquid inlet valve group and a liquid outlet valve group. The liquid inlet of each outdoor assembly is communicated with the first liquid outlet of the inner unit assembly, and the liquid outlet of each outdoor assembly is communicated with the first liquid inlet of the inner unit assembly. And the liquid inlet valve group is communicated with the second liquid outlet of the inner machine assembly and the liquid inlet of each outdoor assembly. And the liquid outlet valve group is communicated with the second liquid inlet of the inner machine assembly and the liquid outlet of each outdoor assembly. Therefore, the conduction state of the liquid inlet valve set and the liquid outlet valve set can be adjusted through the refrigerating or heating mode of the indoor unit, and the function of independent refrigerating, independent heating or simultaneous refrigerating and heating in multiple areas can be achieved on the basis that a heat recovery module does not need to be additionally arranged. Therefore, the structural complexity of the heat pump device is reduced, and the product adaptability of the heat pump device is improved.

The utility model discloses a multi-system water chilling unit which comprises at least two heat exchange systems, at least two waterway systems and a combined heat exchanger, and the heat exchange systems can be combined to form or respectively form an independent heat exchange circulation loop by switching the serial or parallel connection state and the opening or closing state of the combined heat exchanger; the water path system can be combined to form or respectively form an independent water circulation loop, so that the heating or refrigerating capacity of the unit is obviously increased; different heat exchange circulation loops are switched and controlled by adjusting refrigerant flowing paths between the multiple heat exchange systems and the combined heat exchanger, and different water circulation loops are switched and controlled by adjusting water medium flowing paths of the multiple water path systems. Therefore, after the water chilling unit is installed, different operation modes can be selected and switched according to different heat or cooling capacity requirements, hot water or cold water with the corresponding capacity and temperature is produced, the heating or cooling capacity of the unit is matched with the actual requirement, the whole equipment or part of elements do not need to be replaced, cost is low, and maintenance is convenient.

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).

A control device includes a housing and a circuit board assembly. The circuit board assembly includes a circuit board, a processing chip, a gas detection probe and a controllable switch element. The processing chip is configured to acquire target gas information in an environment through the gas detection probe. A control end of the controllable switch element is electrically connected to the processing chip. An output end of the controllable switch element is configured for electrical connection with an external device. The processing chip is configured to control switching on or off of the controllable switch element at least according to the target gas information, thereby controlling change of an electrical signal of the external device. An air conditioner having the control device is also disclosed.

The invention provides a control method of an air conditioner heat recovery system, the air conditioner heat recovery system and a computer readable storage medium. The method comprises the steps that the water temperature of a water heater and the indoor environment temperature at the current moment are obtained; according to the water temperature of the water heater and the indoor environment temperature, the operation mode of the air conditioner heat recovery system is determined, and the first operation mode is a mode that the air conditioner is in a refrigeration mode and does not heat the water heater; the second operation mode is a mode in which the air conditioner is in a refrigeration mode and heat released by a refrigerant of the air conditioner is completely used for heating the water heater, and the third operation mode is a mode in which the air conditioner is in the refrigeration mode and part of heat released by the refrigerant of the air conditioner is used for heating the water heater; and controlling the air conditioner heat recovery system to operate in the operation mode. According to the method, through switching of multiple operation modes of the system, condensation heat can be recovered to reserve domestic hot water in advance while intelligent regulation and control of the indoor temperature are achieved, and effective utilization of heat energy of the whole house is achieved.

Outdoor unit (10) for a heat pump (1) comprising a refrigerant circuit, the outdoor unit comprising a compressor (13), a discharge pipe (17) of the refrigerant circuit connected to a discharge side of the compressor (13), a bottom plate (31), the bottom plate (31) having a base (36) and an outer flange (37) protruding upward from an outer edge of the base (36), a heat source heat exchanger (11) supported on the bottom plate (31), a liquid refrigerant pipe (19; 20) of the refrigerant circuit connected to the heat source heat exchanger (11), and a defrosting bypass pipe (50) connected at one end to the discharge pipe (17) and at the opposite end to the liquid refrigerant pipe (19; 20), the defrosting bypass pipe (50) being arranged between an inner side (37a) of the flange (37) and an outer side (11a) of the heat source heat exchanger (11) .

A heat exchanger includes at least two plate bodies stacked with each other and at least one connecting sheet. Each of the at least two plate bodies is provided with a plurality of micro-passages. The at least one connecting sheet is arranged between adjacent plate bodies of the at least two plate bodies. A solder is disposed on each of two opposite sides of the at least one connecting sheet, and the solder is configured to weld and fix the at least one connecting sheet with the adjacent plate bodies of the at least two plate bodies.

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

To shorten the time until a start of a heating operation from when a command of the heating operation is received again after stopping the heating operation.SOLUTION: If a heating operation or a defrost operation in which a coolant in a refrigerant in a refrigerant circuit circulates in the same direction as in a cooling operation proceeds immediately before a refrigeration cycle operation is stopped in an air conditioner 100, a position of a valve body 52 after a non-operation is maintained at a second position, or is moved to the second position. As a result, it is possible to shorten the time until the start of the heating operation from a non-operation state.SELECTED DRAWING: Figure 6

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.

Heat pump systems that include vapor injection feature are disclosed. Embodiments may include a heat pump system that has two tandem scroll compressors. Each compressor is paired with a control valve that regulates the flow of vapor to the respective compressor. Both the control valves are in fluid communication with a single or common source for vapor injection and to the controller. During operation, the controller dynamically determines how much vapor injection is needed for each of the compressors based on the operational data of the compressors and, optionally, ambient environment data. The controller then operates the two valves to ensure that the right amount of vapor is injected into each compressor.

The utility model provides a heat exchange structure and an air conditioner. The heat exchange structure comprises a first heat exchanger and a second heat exchanger, a second heat exchanger; the pipeline structure is connected with the first heat exchanger and the second heat exchanger; and the control module is used for controlling the flow direction of fluid in the pipeline structure, so that the heat exchange structure has a refrigeration parallel connection mode, a refrigeration series connection mode, a heating mode, a heating defrosting mode and a defrosting mode. The heat exchange structure solves the technical problem that a heat exchanger structure with an alternate defrosting function in the prior art is poor in heat exchange effect.

To provide a refrigeration cycle device having a structure in preparation of such a case that a combustible refrigerant leaks.SOLUTION: A refrigeration cycle device includes: a housing 22 provided with an internal space; a partition plate 36 provided in the housing 22 and partitioning the internal space to a blowing chamber R1 and a machine chamber R2; a heat exchanger 24 disposed in the blowing chamber R1; a fan disposed in the blowing chamber R1; and a compressor disposed in the machine chamber R2, compressing a combustible refrigerant heavier than air, and discharging the compressed refrigerant. The housing 22 is provided with a refrigerant discharge hole 22b making the lower part of the machine chamber R2 communicate with the outer part of the housing 22. In addition to the refrigerant discharge hole 22b, a through hole or a gap making the machine chamber R2 communicate with the outer part of the housing 22 exists in the housing 22. A flow passage cross-sectional area of the refrigerant discharge hole 22b is larger than a flow passage cross-sectional area of each of the through hole or the gap other than the refrigerant discharge hole 22b.SELECTED DRAWING: Figure 2

Methods and related systems for controlling indoor relative humidity are disclosed. In an embodiment, the method includes (a) determining a target dew point temperature based on desired indoor conditions for the indoor space, and (b) determining an initial dew point temperature based on an initial set of current indoor conditions of the indoor space. In addition, the method includes (c) determining a target coil temperature of a coil of an indoor heat exchanger of the climate control system based on the target dew point temperature and the initial dew point temperature, and (d) adjusting a speed of air flowing across the coil or a speed of a compressor of the climate control system after (c) based on the target coil temperature to reduce a difference between a coil temperature of the coil and the target coil temperature.

[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.

A heat pump system is provided. The heat pump system includes a first compressor and a second compressor and a first heat exchanger, a second heat exchanger, and a third heat exchanger. The system further includes a first expansion device, a second expansion device, and a third expansion device. When the system operates in a cascade heating mode, the third heat exchanger is configured to: receive a first portion of refrigerant from the first compressor and a second portion of refrigerant from the second compressor, and provide a first consistent flow of refrigerant to the first compressor and a second consistent flow of refrigerant to the second compressor so as to improve an efficiency of the system.

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.

The invention discloses a variable frequency heat pump unit and a heat dissipation control method.The variable frequency heat pump unit comprises a refrigerant circulation loop and a variable frequency driving module, the refrigerant circulation loop is formed by connecting a compressor, a heat exchanger combination, a liquid storage device and a gas-liquid separator, and the variable frequency driving module is provided with a heat dissipation pipeline; the outlet end of the heat dissipation pipeline is connected to the air suction side of the compressor, the inlet end of the heat dissipation pipeline communicates with a liquid storage cavity of the liquid storage device through a first branch and a second branch, the first branch is provided with a cooling pipe section located in the gas-liquid separator, a first throttling device is installed on the outlet side of the cooling pipe section, and the second branch is located outside the gas-liquid separator. The second branch is provided with a second throttling device; the first throttling device and the second throttling device are adjustable in opening degree and work cooperatively. The liquid refrigerant in the liquid storage device is led out to dissipate heat of the variable frequency driving module, the influence of heat dissipation on main path circulation is reduced, and the heat dissipation efficiency and the unit performance can be both considered.

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 gas-fired heat pump unit that directly utilizes engine waste heat and features adjustable air supply is disclosed. The condenser and water supply and return lines are combined with refrigerant and coolant heat exchange lines. Refrigerant flows from the quasi-two-stage compressor outlet through the refrigerant heat exchange line, dividing it into a main path and an auxiliary path. The auxiliary path connects to the quasi-two-stage compressor air supply port after passing through a first electronic expansion valve and a flue gas heat exchanger. The main path, switched by a four-way reversing valve, can control forward and reverse circulation between the second electronic expansion valve and the outdoor evaporator. The outlet is connected to the quasi-two-stage compressor inlet. Coolant flows from the gas engine outlet through a coolant circulation pump and the coolant heat exchange line back to the inlet. The gas engine exhaust port is connected to the flue gas heat exchanger. Compressor air supply is simple and highly adjustable. The condenser utilizes stepped heating to decouple engine waste heat from compressor power. Heating is continuous during reverse cycle defrosting, improving indoor thermal comfort.

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.