1575 results about "Four-way valve" patented technology

An improved heat pump including an integrated system for the management of refrigerant charge is provided. The integrated system actively adjusts charge allocation and thereby optimizes operational efficiencies in all modes of operation. In one embodiment, the integrated system includes three four-way valves, two expansion valves, two one-way check valves, and a suction line accumulator to optimize charge allocation. The four-way valves dictate the mode switch and refrigerant flow directions, and the expansion valves automatically allocate refrigerant mass in active components and store excess charge in an idle heat exchanger and suction line accumulator by controlling the compressor discharge pressure (equivalent to controlling condenser subcooling degree) as a function of the entering air and water temperatures. The integrated system provides seven working modes and is uniquely suited for spacing cooling, spacing heating, and water heating in both residential and commercial applications.

The invention discloses a four-way valve assembly, a heating and ventilation equipment outdoor unit and heating and ventilation equipment, and relates to the technical field of heating and ventilation equipment. The four-way valve assembly comprises a valve body, a plurality of electric appliance parts and a switching part, the plurality of electric appliance parts are in telecommunication connection with the switching part through a first line, and then the switching part is in telecommunication connection with the control device through a second line, so that telecommunication connection between the plurality of electric appliance parts and the control device is achieved. Compared with an original mode that a plurality of electric appliance parts are in one-to-one telecommunication connection with the control device through a plurality of circuits, the complexity of the circuits can be reduced, so that the internal space of a machine body of the outdoor unit of the heating and ventilation equipment is saved, and the size and the production cost of the machine body are reduced.

Disclosed is a hydraulic control system for safe rapid opening or closing of a valve. The hydraulic control system comprises a hydraulic cylinder (71), a pressure oil line (141), an oil return line (151), an oil drain line (161), a quick oil return line (171) and a valve manifold (181), wherein the inside of the valve manifold is provided with a three-position four-way directional control valve (51), a bidirectional hydraulic lock (31), a first two-position four-way directional control valve (61) and an energy accumulator (191); a first cartridge valve (101) is connected between the oil drain line and a rod cavity of the hydraulic cylinder, and a pilot port of the first cartridge valve is connected to a port A of the first two-position four-way valve; an oil inlet of the energy accumulator is connected to each of the pressure oil line and the oil return line, a first check valve (81) is connected between the oil inlet of the energy accumulator and the pressure oil line, and a second cartridge valve (102) is connected between the first check valve and the energy accumulator; and the second cartridge valve is connected to a rodless cavity of the hydraulic cylinder, and a pilot port of the second cartridge valve is connected to the port A of the first two-position four-way directional control valve. The hydraulic control system for safe rapid opening or closing of a valve allows for safe rapid opening or closing of a valve.

The invention discloses a whole-vehicle thermal management system of a pure electric vehicle based on a shell-and-tube phase change heat accumulator and a control method of the whole-vehicle thermal management system. The whole-vehicle thermal management system comprises a control module, a heat pump air conditioning system, an electric heating and phase change heat storage system, a battery thermal management system and an electric drive cooling system. The control module controls the rotating speed of the compressor and the opening degree of the electronic expansion valve and adjusts refrigerant flow. The control module controls the rotating speed of each water pump and adjusts the cooling liquid flow; the control module controls the fan and the air blower to adjust the air flow, controls the on-off states of the four-way valves, the three-way valves and the one-way valves and adjusts circulation loops of refrigerants and cooling liquid, and therefore energy coupling between different systems and switching of different working modes are achieved. According to the invention, energy coupling and integrated management among the systems are realized, and the thermal management requirement is met with low energy consumption in multiple scenes.

The utility model discloses a humidifying and dehumidifying machine, comprising a casing, a compressor installed in the casing, a condenser, an evaporator, a fan assembly, a water tank, a four-way valve and a water sprinkling assembly, wherein the four-way valve is respectively connected to the compressor, the condenser and the evaporator, and the water sprinkling assembly comprises a water pump, a spray head, a water outlet pipe respectively connected to the water pump and the spray head, and a water inlet pipe respectively connected to the water pump and the water tank, the spray head is arranged above the condenser and the evaporator, and the water tank is arranged below the condenser and the evaporator. The utility model has humidifying and dehumidifying functions, a simple structure, good humidifying effect, saves costs for consumers, and reduces occupied space.

The invention discloses an air conditioner and a control method of the air conditioner, and the air conditioner comprises a heat exchange flow path on which a living water tank is placed, and the heat exchange flow path is used for realizing heat exchange between the living water tank and a refrigerant circulation flow path; the control valve group is arranged on the refrigerant circulating flow path and is used for opening or closing the refrigerant circulating flow path; the controller is connected with the control valve group and the four-way valve, the controller is configured to obtain a target operation mode of the air conditioner, and the target operation mode is any one of a heating mode, a refrigerating mode or a water heating mode; according to the target operation mode, the on-off states of the control valve set and the four-way valve are controlled so as to adjust the indoor temperature or adjust the water temperature of the living water tank, the air conditioner can meet the requirements of a user for refrigeration, heating and water heating, waste heat generated during refrigeration or heating is fully used for making hot water, and therefore environmental thermal pollution is reduced, and the energy consumption of the air conditioner is reduced. And energy waste in the operation process of the air conditioner is avoided.

The embodiment of the invention provides an air conditioning system and a control method thereof, relates to the technical field of air conditioners, and aims at improving the recovery rate of leaked refrigerants and improving safety. The air conditioning system includes: a refrigerant circulation loop; one of the outdoor heat exchanger and the indoor heat exchanger works as a condenser, the other one works as an evaporator, the indoor heat exchanger is connected with the outdoor heat exchanger through a first refrigerant pipeline, and the indoor heat exchanger is connected with the four-way valve through a second refrigerant pipeline; one end of the first bypass branch is connected with the gas-liquid separator, and the other end of the first bypass branch is connected with the outdoor heat exchanger; the controller is configured to obtain the refrigerant charge quantity after refrigerant leakage is detected; and under the condition that the refrigerant charging amount is larger than the preset charging amount, the air conditioning system is controlled to execute first refrigerant recycling operation, so that the first bypass branch is conducted.

The utility model discloses a four-way valve assembly, a heating and ventilation equipment outdoor unit and heating and ventilation equipment, and relates to the technical field of heating and ventilation equipment. The four-way valve assembly comprises a valve body and a filtering device, the valve body comprises a main valve pipe and a first pipe joint, a second pipe joint and a third pipe joint which are connected to the main valve pipe, the first pipe joint is used for communicating with an exhaust port of the compressor, the second pipe joint is used for communicating with an air return port of the compressor, and the third pipe joint is used for communicating with the heat exchanger; the filtering device is installed on the third pipe connector and used for filtering the refrigerant flowing through the third pipe connector. The filtering device is directly installed on the third pipe connector, so that the filtering device can filter a refrigerant flowing through the third pipe connector, a middle pipeline between the filtering device and the third pipe connector is omitted, and therefore the machine body structure of the outdoor unit of the heating and ventilation equipment can be simplified to a certain degree, and the overall size of the machine body is reduced; and a certain production and manufacturing cost can be reduced.

The invention relates to the technical field of automobile heat management, in particular to a multi-loop integrated heat management system and method for an electric automobile. Comprising a first electronic water pump, a second electronic water pump, a refrigerating device, a first temperature sensor, a second temperature sensor, a pressure sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a first pressure temperature sensor, a second pressure temperature sensor, a first electronic expansion valve, a second electronic expansion valve, an evaporator, a fan and a compressor. According to the system, on the basis of an existing whole vehicle air conditioning system, an air-cooled condenser is replaced with the water-cooled condenser, a three-way valve, an integrated battery, the motor, the controller of the motor and a passenger compartment heat management system are removed, the motor is comprehensively utilized for preheating, the energy utilization rate is increased, and the energy consumption is reduced. The endurance mileage of the whole vehicle is improved, and the complexity of the system is reduced.

The invention discloses a synchronous monitoring system and method for non-methane total hydrocarbon and volatile organic compound components, and belongs to the technical field of environmental monitoring. Comprising an adsorption tube and a monitoring assembly, the adsorption tube is detachably connected with the monitoring assembly, the monitoring assembly comprises a focusing tube, a six-way valve, a four-way valve and a gas chromatograph, and the four-way valve and the six-way valve are each provided with an emptying flow path; the six-way valve is respectively communicated with the focusing tube and the capillary chromatography sampling assembly, and the capillary chromatography sampling assembly, the capillary chromatographic column and the mass spectrometry detector are sequentially communicated; a heating assembly is arranged outside the adsorption tube, a temperature control device is arranged outside the focusing tube, a thermal desorption temperature control area is arranged outside the focusing tube, the six-way valve and the four-way valve, and a column oven is arranged outside the capillary chromatographic column. Synchronous monitoring of non-methane hydrocarbon and VOCs components is achieved through the same monitoring assembly, the occupied space is reduced, the monitoring range is expanded, meanwhile, the sampling volume of the adsorption tube is flexible and controllable, and the sample preservation time is long.

The invention discloses a crankcase air supply system, a crankcase air supply control method, a controller and a vehicle, and relates to the field of hydrogen internal combustion engines. The crankcase air supply system comprises a first air supply pipeline communicating with an air outlet of a supercharger and a first end of a four-way valve, and a second air supply pipeline communicating with an air outlet of a pressurized air storage tank and a second end of the four-way valve; the air outlet of the air filter of the hydrogen internal combustion engine is communicated with the third end of the four-way valve, the four-way valve is communicated with the air supply port of the crankcase, and when the hydrogen internal combustion engine is in a high-load and high-moisture state, the opening degree of the first flow adjusting valve is controlled to be larger than that of the second flow adjusting valve. The opening degree of the second flow adjusting valve is larger than that of the third flow adjusting valve. The method is implemented on the basis of the supercharger, the pressurized gas storage tank and the air filter, and the opening degree of each flow regulating valve is regulated, so that the inlet gas water content is reduced while the gas supplementing requirement of the crankcase is met, and the aim of improving the operation reliability of the hydrogen internal combustion engine is achieved.

The invention provides a direct cooling heat pump air conditioning system for an energy storage temperature control system, which comprises a compressor, a four-way valve, a first branch, a second branch and a liquid cooling device, the first branch is provided with a first end and a second end, the second branch is provided with a port A and a port B, and the second end and the port B are respectively connected with two ends of the liquid cooling device; the four-way valve is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, an exhaust port of the compressor is communicated with the first valve port, an air suction port of the compressor is communicated with the third valve port, a first end is communicated with the second valve port, and a port A is communicated with the fourth valve port; a first condensation section and a first heat exchange section are connected to the first branch in series, and the first heat exchange section is arranged between the first condensation section and the second end. A second condensation section and a second heat exchange section are connected to the second branch in series, and the second heat exchange section is arranged between the second condensation section and the port B. The technical problem that in the prior art, a liquid cooling system needs multiple heat exchange, cold energy cannot directly act on a heating battery cell, and the heat exchange performance is low is solved.

The utility model discloses a silencer and an air conditioner. The silencing device is applied to the air conditioner, the air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger, a four-way valve and a compressor, the inlet end of the silencing device is communicated with the exhaust end of the compressor, the outlet end of the silencing device is connected with the four-way valve, and the silencing device comprises at least two silencing branches. Each silencing branch is correspondingly provided with a silencer, and the connection relation between different silencers can be changed; and the controller is used for controlling the connection relationship between different silencers in the silencing device, so that the silencing parameters of the silencing device are changed, and the silencing amount of the silencing device is changed. By means of the air conditioner, noise of different frequencies can be reduced, the noise between the indoor part and the outdoor part of the air conditioner can meet the noise requirement, and the user experience is improved.

A heat pump includes a refrigerant loop. The refrigerant loop includes a first heat exchanger, a first region of a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a compressor, a vapor generator, and a four-way valve. The compressor includes a low-pressure inlet, a mid-pressure inlet, and an outlet. The vapor generator is positioned downstream of the outlet of the compressor and upstream of both the low-pressure inlet and the mid-pressure inlet. The four-way valve is positioned immediately upstream of the first heat exchanger. At least one component chosen from the first heat exchanger, the second heat exchanger, and the vapor generator is free from compressor-driven flow of the first heat exchange fluid during a first predetermined set of heating modes of operation of the heat pump and a first predetermined set of cooling modes of operation of the heat pump.

The invention relates to a quantitative evaluation device and method for shale imbibition oil and gas production capacity under reservoir conditions, the quantitative evaluation device for shale imbibition oil and gas production capacity under reservoir conditions comprises a saturated imbibition chamber, a visual measuring tube and a water drainage and gas collection device, and a detachable steel sealing cover is arranged at the bottom of the saturated imbibition chamber; a shale core is placed on an imbibition net of the saturated imbibition chamber, the saturated imbibition chamber, the live oil intermediate container, the imbibition agent intermediate container and the visual measuring tube are arranged in the constant-temperature box, and the live oil intermediate container and the imbibition agent intermediate container are connected between the constant-pressure constant-speed pump and an inlet of a steel sealing cover of the saturated imbibition chamber in parallel. A steel sealing cover of the saturated imbibition chamber is connected with an emptying valve and a vacuum pump; an overflow pipe is arranged on the arc-shaped top of the saturated imbibition chamber; the overflow pipe is connected with a four-way valve, and the four-way valve is further connected with a visual measuring tube and a drainage and gas collection device; and the visual measuring tube is positioned right above the saturated imbibition chamber. The problems of liquid leakage of the imbibition chamber and fragmentation of the metering glass tube are effectively solved, and the reservoir imbibition process is truly reflected.

The utility model relates to a heat pump system capable of preventing ice accumulation, which comprises a compressor, a four-way valve, a first heat exchanger and a second heat exchanger which sequentially form a refrigerant main loop, a water collecting tray is arranged at the bottom of the second heat exchanger, a first branch pipe is connected to the water collecting tray, and a first electromagnetic valve is arranged on the first branch pipe; the tail end of the first branch pipe is connected with a second branch pipe, and a water pump is arranged on the second branch pipe; the tail end of the second branch pipe is connected with a water drainage pipe, and a second electromagnetic valve is arranged on the water drainage pipe. A third branch pipe is arranged at the joint of the drainage pipe and the second branch pipe, a third electromagnetic valve is arranged on the third branch pipe, and the tail end of the third branch pipe is communicated with the water outlet pipe of the first heat exchanger. According to the scheme, the water pump is adopted for water pumping type drainage, and water in the water collecting disc is pumped and drained before being frozen. In addition, the water pump adds water in a water pumping mode, water in the water inlet pipeline is distributed to the position above the heat exchanger, defrosting of the heat exchanger is accelerated, and the defrosting time is shortened.

The utility model relates to an air source heat pump system which can respectively control two air side heat exchangers arranged in parallel through two four-way valves arranged in parallel, a one-way valve and a two-way valve, and in a conventional heating mode, the two air side heat exchangers serve as evaporators to absorb heat of air, so that the heating capacity of the system is improved; in the anti-frosting heating mode, the second air side heat exchanger serving as an evaporator is converted into the condenser for use, a small part of heating capacity of the system is sacrificed, it is guaranteed that the first air side heat exchanger and the second air side heat exchanger are not frosted, and therefore after the system operates for a period of time, defrosting of an anti-heat pump can be omitted, and the system reliability is improved. The continuity and stability of heating of the system are guaranteed, it is guaranteed that the water temperature of hot water does not fluctuate, and the heat using experience of a user is improved; meanwhile, the problem that the heat exchange capacity of the air-side heat exchanger is seriously reduced due to frequent frosting of the air-side heat exchanger and accelerated aging of the air-side heat exchanger in the defrosting process is solved.

The invention provides a heat pump non-stop defrosting control method and system based on double-evaporator cooperative control, and the method comprises the steps: building a temperature difference response change rate index by collecting the refrigerant inlet and outlet temperatures of two groups of fin heat exchangers in real time, and recognizing a side needing to be defrosted and a heating side; an electronic expansion valve, a fan and an electromagnetic valve are dynamically configured, so that the side needing to be defrosted enters a static defrosting mode, and the heating side continuously supplies heat; the frequency rising of the compressor and the switching of the four-way valve are cooperatively adjusted, and small-flow pre-balancing is executed before reversing so as to restrain pressure impact; and after defrosting is completed, it is judged that defrosting is finished based on the thermal response state and the heat change trend, the side needing defrosting is controlled to be reset, and heating is started again. Uninterrupted heat supply of the user side in the defrosting process is achieved, water temperature fluctuation and energy consumption are remarkably reduced, and the operation stability and energy efficiency of the heat pump in the low-temperature and high-humidity environment are improved.

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.

The invention provides a wide-temperature-range and low-energy-consumption integrated thermal management system for a hovercar. The hovercar integrated heat management system comprises a battery, a motor, an electric controller, an out-cabin radiator, an in-cabin warm air / cold air core body, first to sixth three-way valves, a four-way valve, first to second liquid storage tanks, first to third oil pumps, a gas-liquid separator, a compressor, a condenser, an expansion valve, a plate heat exchanger and the like. Through mutual cooperation and cooperation of the electrically-driven heat dissipation main pipeline, the electrically-driven heat dissipation branch pipeline, the battery heat dissipation main pipeline, the battery heat dissipation first branch pipeline, the battery heat dissipation second branch pipeline and the steam compression circulation pipeline, the heating and heat dissipation requirements of a passenger compartment, the electrically-driven heat dissipation requirement and the battery heat dissipation requirement can be met at the same time, and the system architecture is highly integrated; while the energy utilization efficiency of the whole vehicle is improved, the lightweight level of the whole vehicle is also improved.

The invention provides a double-pump-head four-channel liquid cooling centrifugal pump and a using method thereof.The double-pump-head four-channel liquid cooling centrifugal pump comprises a machine shell, a water pump support is arranged below the machine shell, and the pump can cover wider flow and lift ranges through double impellers and four channels and is suitable for various application scenes. The connection mode is flexible, various application requirements can be met, and the use flexibility is improved. The multiplication of flow or lift is realized under the same power, and the efficiency and the performance of the pump are improved. The four-way water pump can meet the operation requirements of two water ways at the same time, is suitable for the scene where multiple systems need to be supplied at the same time, and when the four-way water pump is used in cooperation with a four-way valve, the flow lift range can be widened to twice that of a common water pump, energy consumption is reduced, and operation cost is reduced. Heat of the pump body motor is taken away through medium liquid, the temperature is lowered, and the service life is prolonged. The pump has wide application prospects in the fields of industry, agriculture, buildings and the like, and the application scene and the application range of the pump are widened.

The invention relates to the technical field of rare earth ore flotation, in particular to a rare earth ore efficient flotation separation device which comprises a box body and a discharging pipe connected to the box body, an installation plate is fixedly connected to the box body, a feeding pipe located in the box body is fixedly connected to the installation plate, and a four-way valve connected with the feeding pipe is installed on the box body. A baffle is slidably connected to the box body. The stirring shaft and the porous plate rotate to stir ore pulp and a reagent, so that the ore pulp and the reagent are fully contacted and reacted, generated bubbles are fully contacted and mixed with minerals in the ore pulp, the minerals and the bubbles are fully adsorbed, and the bubbles drive the minerals to move upwards and float on the liquid surface to form a foam layer to complete flotation separation; and then the liquid level sensor detects the height of the liquid level and controls the electric lifting frame to move, so that the electric rotating cylinder drives the scraping plate to move up and down to make contact with the foam layer all the time for scraping, the scraping plate is prevented from being separated from the foam layer to affect scraping, and the mineral collecting effect is improved.

The utility model discloses a four-way valve assembly, a heating and ventilation equipment outdoor unit and heating and ventilation equipment, and relates to the technical field of heating and ventilation equipment. The four-way valve assembly comprises a valve body, a plurality of electric appliance parts and a switching part, the plurality of electric appliance parts are in telecommunication connection with the switching part through a first line, and then the switching part is in telecommunication connection with the control device through a second line, so that telecommunication connection between the plurality of electric appliance parts and the control device is achieved. Compared with an original mode that a plurality of electric appliance parts are in one-to-one telecommunication connection with the control device through a plurality of circuits, the complexity of the circuits can be reduced, so that the internal space of a machine body of the outdoor unit of the heating and ventilation equipment is saved, and the size and the production cost of the machine body are reduced.

The invention provides a copper alloy electric four-way cock, which relates to the field of four-way cock valves, and comprises a valve driver, a four-way cock valve body, a four-way valve core, a water flow reversing channel, a connecting flange plate, a position limiting ring and a pressed limiting plate, the four-way plug valve body is arranged at the lower part of the valve driver; the four-way valve element is rotationally connected to the middle of the four-way plug valve body. The water flow reversing channel is formed in the lower portion of the four-way valve element. The connecting flange plate is welded on the outer side of the four-way plug valve body; the position limiting ring is welded on the outer side of the connecting flange plate; the pressed limiting plate is connected to the outer side of the position limiting ring in a sliding mode. The connecting flange plate and the cooling pipeline flange can be conveniently aligned, a large amount of time is saved, the installation efficiency of the four-way plug valve is improved, and the problems that long time needs to be consumed when the connecting flange is aligned, and the installation efficiency is affected are solved.

The present invention discloses a thermal management system and an automobile. The thermal management system includes a refrigerant circuit and a water circuit. The refrigerant circuit contains liquid refrigerant and includes multiple components, including a compressor, a first heat exchanger, a second heat exchanger, a condenser, a first evaporator, a second evaporator, a first expansion valve, a second expansion valve, and a third expansion valve, forming a corresponding circuit as needed. The water circuit contains coolant and includes multiple components, including the first heat exchanger, a first water pump, a drive assembly, a first four-way valve, a second four-way valve, a battery assembly, a second water pump, a three-way valve, and the second heat exchanger, forming a corresponding circuit as needed. The technical solution of the present invention simplifies the thermal management system and reduces overall vehicle energy consumption.

The invention provides air conditioning equipment and a control method and device thereof. The outdoor unit comprises a compressor, a four-way valve, an outdoor heat exchange assembly, a first middle heat exchange assembly and a second middle heat exchange assembly; the refrigerant pipeline comprises a refrigerant main path, a first branch path and a second branch path, the first branch path and the second branch path are connected in parallel and communicate with the refrigerant main path, a first middle heat exchange assembly and a second middle heat exchange assembly are arranged on the first branch path and the second branch path correspondingly, and an outdoor heat exchange assembly is arranged on the refrigerant main path; a plurality of indoor units; the refrigerant pipeline further comprises a third branch, one end of the third branch is connected to the part, located between the four-way valve and the outdoor heat exchange assembly, of the refrigerant main pipeline, and the other end of the third branch is connected to the second branch. The system cost is reduced, the potential safety hazard of refrigerant leakage is avoided, and the operation efficiency is improved. And the refrigerant only circulates on the outdoor side, expensive copper pipes do not need to be used for long-distance piping from the indoor side to the outdoor side, and the cost is further reduced.

The invention provides an air conditioner loop and an automobile, and relates to the field of automobile air conditioner loops. The air conditioner loop comprises a main loop and a heat return loop which are connected with each other, a first heat exchanger and a second heat exchanger are arranged in the main loop, and the main loop is communicated with a passenger compartment and an environment space; a plurality of four-way valves are arranged in the air conditioner loop, and the air conditioner loop can form a refrigerating loop or a heating loop by changing the communication mode of the four-way valves so as to meet the requirements for refrigerating in summer and heating in winter of a passenger compartment. In addition, a heat regeneration loop is introduced into the air conditioner loop, circulating air in a passenger compartment can be utilized, and therefore power consumption of a compressor can be reduced, refrigerating or heating capacity can be increased, the refrigerating coefficient under the high-temperature condition in summer and the heating coefficient under the low-temperature condition in winter are effectively increased, energy consumption of the air conditioner loop is reduced, and the economical efficiency of the whole vehicle is improved.

The invention discloses a fuel cell engine control method and device, a fuel cell controller and a medium. The fuel cell engine control method comprises the steps that the current environment temperature is obtained after a fuel cell engine is started, and the current starting mode of the fuel cell engine is determined according to the current environment temperature; after the fuel cell engine enters the current starting mode, the stack air inlet temperature and the stack air inlet humidity are detected, and according to the stack air inlet temperature and the stack air inlet humidity, a hydrogen pump and a gas compressor are controlled to be started for hydrogen supply; after it is detected that the hydrogen discharging valve and the water discharging valve are opened successfully, the isolating valve is opened, the average monomer voltage and the monomer voltage standard deviation are calculated according to the detected actual galvanic pile monomer voltage, and the opening degree of the four-way valve and the opening degree of the back pressure valve are controlled according to the average monomer voltage and the monomer voltage standard deviation; the air flow entering the electric pile is controlled based on the opening degree. According to the invention, the engine can be quickly and efficiently started under different environment working conditions.

The utility model provides a window type air conditioner which comprises a shell, a compressor, a four-way valve, an indoor heat exchanger and an outdoor heat exchanger, the compressor, the four-way valve, the indoor heat exchanger and the outdoor heat exchanger are arranged in the shell and sequentially connected to form a refrigerant loop, a drain valve is arranged on a chassis of the shell, and a supercooling pipe is further arranged in the shell, connected between the indoor heat exchanger and the outdoor heat exchanger and located on the chassis; the first one-way throttle valve is arranged between the indoor heat exchanger and the first end of the supercooling pipe; a throttling outlet of the first one-way throttling valve communicates with the indoor heat exchanger, and a throttling inlet of the first one-way throttling valve communicates with the first end of the supercooling pipe. The second one-way throttle valve is arranged between the outdoor heat exchanger and the second end of the supercooling pipe, a throttle outlet of the second one-way throttle valve is communicated with the outdoor heat exchanger, and a throttle inlet of the second one-way throttle valve is communicated with the second end of the supercooling pipe. The energy efficiency of the air conditioner during refrigeration and heating and the drainage performance of the air conditioner can be improved, freezing of the base plate is delayed or deicing is achieved, and the freezing risk of the base plate is reduced.

The invention provides an outdoor unit of an air conditioner, the air conditioner and a control method and device of the air conditioner. The outdoor unit comprises a compressor, a four-way valve, an oil separator and a gas-liquid separator; an inlet of the oil separator is communicated with an exhaust port of the compressor, a refrigerant outlet of the oil separator is communicated to the four-way valve, and an oil outlet of the oil separator is connected with a first oil return branch and a second oil return branch; wherein the first oil return branch is directly communicated to an air suction port of the compressor, and the second oil return branch flows through a liquid storage area of the gas-liquid separator and is communicated to the air suction port of the compressor; the first oil return branch is provided with a first electromagnetic valve, and the second oil return branch is provided with a second electromagnetic valve. According to the outdoor unit of the air conditioner, the air conditioner and the control method and device of the air conditioner, the second oil return branch passing through the liquid storage area of the gas-liquid separator is arranged, so that the oil return temperature of the air suction port of the compressor is reduced, and the problems that the gas-liquid separator is frosted and the liquid level is too high can be solved.