73results about How to "Increase refrigerant flow" patented technology

A refrigeration cycle apparatus includes a compressor, a radiator, an expander, an evaporator, a bypass circuit, and an injection circuit. The bypass circuit has a flow rate control valve and a gas-liquid separator. One end of the bypass circuit is connected to an intake conduit of the expander and the other end thereof is connected to a discharge conduit of the expander so that a portion of refrigerant passed through the radiator bypasses the expander and is guided to the flow rate control valve and that the liquid refrigerant separated by the gas-liquid separator returns to the discharge conduit of the expander. One end of the injection circuit is connected to a gas outlet portion of the gas-liquid separator and the other end thereof is connected to an intermediate pressure portion of the compressor.

The invention discloses an anti-condensation control method for electronic control on the refrigerant heat dissipation of an air conditioner. The anti-condensation control method comprises the following steps: an environment temperature T1 and a refrigerant heat dissipation pipe temperature T2 are acquired, and the temperature difference value t between the environment temperature T1 and the refrigerant heat dissipation pipe temperature T2 is calculated; if the temperature difference value t is greater than a first preset temperature, the opening degree of an electronic expansion valve of an outdoor unit is controlled to be increased in a preset control manner; and because the opening degree of the electronic expansion valve of the outdoor unit is increased, interception for a refrigerant is reduced and then the flow rate of the refrigerant is increased, the refrigerant flows through a refrigerant heat dissipation pipe and then the refrigerant heat dissipation pipe temperature T2 rises, and the temperature difference value t is reduced in the case of the invariable environment temperature T1, so that an electronic control board is prevented from generating condensation. The invention further discloses an anti-condensation control device for electronic control on the refrigerant heat dissipation of an air conditioner. The method and the device solve the problem that the electronic control board generates dew to influence the electronic control reliability when the refrigerant heat dissipation pipe temperature is lower than a dew point temperature during the running of the air conditioner.

The invention discloses a refrigerant control system and a method. The refrigerant control system comprises an acquisition device, a calculating device and an electronic expansion valve, wherein the acquisition device is used for acquiring discharge temperature, suction temperature, high-pressured pressure and low-pressured pressure; the calculating device is used for calculating discharge superheat, target suction superheat and actual suction superheat, judging whether the actual suction superheat is higher than the target suction superheat or not, and sending a judgment result to the electronic expansion valve; the electronic expansion valve is used for increasing refrigerant flux when the actual suction superheat is higher than the target suction superheat, and reducing the refrigerant flux when the actual suction superheat is lower than the target suction superheat. According to the refrigerant control system provided by the invention, the acquisition and the calculation of the temperature and the pressure are utilized, so that the refrigerant volume flowing into a compressor can be ensured to be within a controlled range, and engine oil of the compressor can be prevented from being diluted by more refrigerant, and the safe and stable operation of the system is ensured. The invention also discloses an air conditioner comprising the refrigerant control system.

The invention relates to an air source heat pump unit and an operating method thereof. A compressor is communicated with an indoor heat exchanger through a first on-and-off valve and a four-way reversing valve; the indoor heat exchanger is connected with a bidirectional liquid accumulator through a first one-way valve; one path is connected to the compressor through an anti-frosting coil, a third throttle valve, an outdoor heat exchanger, the four-way reversing valve, the bidirectional liquid accumulator and a second on-and-off valve; the other path is connected to the compressor through an electromagnetic valve, a second throttle valve and the second on-and-off valve; the first one-way valve is connected in parallel with the first throttle valve; the third throttle valve is connected in parallel with a second one-way valve; the compressor is communicated with the outdoor heat exchanger through the first on-and-off valve and the four-way reversing valve; and the outdoor heat exchanger is connected with the bidirectional liquid accumulator through the second one-way valve and the anti-frosting coil, and then is connected to the compressor through the first throttle valve, the indoor heat exchanger, the four-way reversing valve, the bidirectional liquid accumulator, and the second on-and-off valve. The air source heat pump unit has the advantages of wide temperature application range, frosting delay, and high-efficiency operation all year round.

The invention discloses an adjusting method and system for the running state of an air conditioner and the air conditioner. The adjusting method includes the following steps that the environment temperature value and/or the system temperature value of the air conditioner are/is detected, if the environment temperature value exceeds the first preset range and/or the system temperature value exceeds the second preset range, the capacity of a liquid storage tank is changed, the refrigerant flow of an air conditioner system is controlled through changes of the capacity of the liquid storage tank, and the running state of the air conditioner is adjusted; the adjusting system comprises a controller, a temperature sensor, a power supply device and the capacity-adjustable liquid storage tank; and the air conditioner comprises the above adjusting system for the running state of the air conditioner. The refrigerant flow in a refrigerating system is adjusted by changing the capacity of the liquid storage tank, and therefore the air conditioner has the functions of fast refrigerating and non-halt frosting preventing; and in addition, the adjusting method and system for the running state of the air conditioner and the air conditioner have the beneficial effects that the structure is simple, and reliability is high.

The invention provides a parameter control method and control device of an air conditioner and the air conditioner. The control method comprises the steps that when the temperature variable quantity of the real-time environment temperature relative to the preset temperature is smaller than or equal to the preset temperature variable quantity, the current real-time temperature of the current position of a user and the average temperature of the local environment where the current position is located are detected; the average air speed of the local environment is determined according to the current rotating speed of an indoor draught fan of the air conditioner and/or the air supply parameter of an air deflector of the air conditioner; and the equivalent air outlet temperature parameter of the air conditioner is determined according to at least one parameter of the current real-time temperature, the average temperature and the average air speed, and the equivalent air outlet temperature parameter is controlled to be larger than or equal to the first equivalent air outlet temperature parameter and be smaller than or equal to the second equivalent air outlet temperature parameter. By means of the technical scheme, the blowing feeling of the air conditioner can be reduced, an air conditioner room has no blowing feeling, and therefore the use comfort of the air conditioner is improved.

The invention is directed to a heat exchanger (10) having a block (2) which includes a plurality of tubes (11) for conducting a fluid therethrough. The heat exchanger also includes a collector (5) having a tube base (4). The tubes have tube end sections (11) and the tubes are inserted into the tube base so that the end sections are accommodated therein and extend into the collector to an insertion depth (x). The insertion depth (x) of the end sections (11a) is variable. The heat exchanger is preferably used as an evaporator in climate control systems for motor vehicles.

The invention relates to a double-source heat pump water heater, which is provided with different refrigerant circuit systems with three four-way valves and one four-way valve; the refrigerant circuit system with three four-way valves is characterized in that a first interface, a second interface, a third interface and a fourth interface of a first four-way valve are respectively connected with an exhaust port of a compressor, an inlet of a hot water heat exchanger, a third interface of a third four-way valve and an inlet of an air-liquid separator; an outlet of the hot water heat exchanger is connected with an inlet of a throttling device; a first interface, a second interface, a third interface and a fourth interface of a second four-way valve are respectively connected with an outlet of the throttling device, a lower end port of an air source heat exchanger, a lower end port of a water source heat exchanger and a first interface of the third four-way valve; a second interface and a fourth interface of the third four-way valve are respectively connected with an upper end port of the water source heat exchanger and an inlet of the air-liquid separator; an outlet of the air-liquid separator is connected with an air inlet of the compressor; a unit is provided with an air source, a water source, an air source and water source serial-connection circulation and defrosting plus antifreezing mode; and the heat cascade application double-source heat pump water heater is additionally provided with a heat recovery-clean water preheater, the coefficient of performance (COP) of the unit is higher than 6, and the double-source heat pump water heater is a high-efficient energy-saving product.

A compressor and an air conditioner including the same having an improved structure capable of decreasing a discharge temperature of the compressor. The compressor which compresses and discharges refrigerant includes a casing defining an external appearance thereof, at least one cylinder including an inner space, a rolling piston which eccentrically turns in the inner space, a vane which radially abuts the rolling piston and divides the inner space into a suction chamber and a compression chamber, and a vane chamber recessed outward of the inner space such that the vane advances and retreats, a plurality of plates disposed above and below the at least one cylinder so as to define the inner space, an injection line provided in one of the at least one cylinder and the plural plates, and a check valve installed on the injection line.

The invention discloses a dual-heat source heat pump water heating all-in-one machine employing dual four-way valves for switching. Three technical schemes are provided. The all-in-one machine is characterized in that two four-way valves are used for a refrigerant loop according to each technical scheme; and a compressor, a hot water heat exchanger, a water source heat exchanger, a wind source heat exchanger, a throttler and the like are connected into the dual-heat source heat pump water heating all-in-one machine with a wind-source or water-source water heating sub-cycle, a dual-source water heating sub-cycle and a defrosting sub-cycle. Firstly, according to a loop with a wind-source and dual-source serial sub-cycle, first to fourth joints of a first four-way valve are connected with an outlet of the compressor, an inlet of the hot water heat exchanger, an upper opening of the wind source heat exchanger and an inlet of a gas-liquid separator respectively; an outlet of the hot water heat exchanger is connected in series with a liquid storage device and a filter, and then is connected with an inlet of the throttler; first to fourth joints of a second four-way valve are connected with an outlet of the throttler, a lower opening of the wind source heat exchanger, a lower opening of the water source heat exchanger and an upper opening of the water source heat exchanger respectively; and an outlet of the gas-liquid separator is connected with an inlet of the compressor. Secondly, a water-source and dual-source serial sub-cycle is provided. Thirdly, a wind-source and dual-source parallel sub-cycle is provided.

In a refrigerant cycle device, a radiator has a heat radiating portion for radiating high-pressure refrigerant discharged from a compressor and a refrigerant outlet downstream from the heat radiating portion, an ejector includes a nozzle portion for decompressing and expanding refrigerant and a refrigerant suction port for sucking refrigerant by high-velocity refrigerant flow jetted from the nozzle portion. The refrigerant cycle device includes a throttle unit for decompressing refrigerant flowing out of the refrigerant outlet of the radiator, an evaporator located between a refrigerant downstream side of the throttle unit and the refrigerant suction port of the ejector, and a branch portion located within the heat radiating portion of the radiator to branch a refrigerant flow. In the refrigerant cycle device, the nozzle portion has a nozzle inlet coupled to the branch portion so that refrigerant flows into the nozzle inlet from the branch portion of the radiator.

The invention discloses a defrosting control method of an air conditioner outdoor unit. The coil pipe temperature Te of a flow dividing branch on the bottommost part is obtained, according to the temperature interval of Te, the opening degree of a first electronic expansion valve is controlled to the corresponding opening degree value of the temperature interval, the lower the temperature value ofthe temperature interval is, the larger the corresponding opening degree value is, the lower the temperature value of the temperature interval of the coil pipe temperature Te of the flow dividing branch on the bottommost part is, the larger the corresponding opening degree value of the temperature interval is, therefore, the opening degree of the first electronic expansion valve is larger, the refrigerant flow entering the flow dividing branch on the bottommost part can be increased, the temperature of the bottom of an outdoor heat exchanger can be increased, serious bottom frosting of the outdoor heat exchanger during air conditioner heating can be prevented, frosting of the outdoor heat exchanger is prevented, or the frosting of the outdoor heat exchanger is relieved to the maximum degree, the defrosting time is shortened, the continuity of heating running is increased, and the use experience of a user is improved.

A method for controlling a flow of refrigerant to an evaporator (1) arranged in a refrigeration system is disclosed. The refrigeration system further comprises an expansion valve (12) and a compressor, the expansion valve (12), the evaporator (1) and the compressor being arranged in a refrigerant flow path having refrigerant flowing therein. The method comprises the steps of increasing an opening degree of the expansion valve (12), thereby increasing a flow of refrigerant to the evaporator (1) sufficiently to substantially eliminate a dry zone (3) of the evaporator (1), decreasing the opening degree of the expansion valve (12) after a period of time has lapsed, and repeating the steps of increasing and decreasing the opening degree of the expansion valve (12). Thus, the opening degree of the expansion valve (12) is ‘pulsated’. This causes the superheat value of refrigerant leaving the evaporator (1) to ‘toggle’ between a zero level and a low, but positive, level. Thereby the average superheat value of the refrigerant leaving the evaporator (1) is decreased, and the refrigeration capacity of the evaporator (1) is utilised more efficiently. Simultaneously, it is ensured that the amount of liquid refrigerant being allowed to pass through the evaporator (1) is kept sufficiently low to prevent damage to the compressor.

The invention discloses a heat pump dryer system. A heating system comprises an air injection enthalpy increasing compressor, a four-way reversing valve, a heating coiler, a thermostatic expansion valve, a refrigerating coiler and a gas-liquid separating device; an economizer system comprises a flash evaporator and a jetting electromagnetic valve; the dehumidification system comprises an electronic expansion valve, a dehumidification electromagnetic valve and a dehumidification coiler; a defrosting system is a singly-arranged defrosting electromagnetic valve; the flash evaporator and the electronic expansion valve are connected between the thermostatic expansion valve and the refrigerating coiler in series, the flash evaporator is arranged on the side close to the thermostatic expansion valve, and the flash evaporator is further connected to the input end of the enthalpy increasing compressor through the jetting electromagnetic valve; the dehumidification electromagnetic valve and the dehumidification coiler are connected to the two ends of the refrigerating coiler in parallel, and the dehumidification electromagnetic valve is arranged on one side close to the electronic expansion valve; and the dehumidification electromagnetic valve is connected to the two ends of the flash evaporator and the electronic expansion valve in parallel. By means of the heat pump dryer system, the compressor efficiency and the internal dehumidification and defrosting effects can be improved, the structure is simple and effective, and the heat pump dryer system is worthy of popularization.

The invention relates to the field of heat pump equipment and particularly relates to a heat pump water heater. Aiming at the problem that a heat pump water heater in a wet-cold region is difficult to be defrosted, the heat pump water heater provided by the invention is additionally provided with a second heater in a position opposite to an evaporator of an existing heat pump water heater, so that one part of hot water generated by the heat pump water heater exchanges heat with air which is to enter the evaporator in the second heater, so that the temperature of the air entering the evaporator is increased, and by virtue of reverse defrosting, the problem of frosting in winter in the wet-cold region can be effectively solved; furthermore, the heat pump water heater is low in cost and good in effect. The heat pump water heater provided by the invention can be widely applied to heating water systems in the wet-cold region in winter.

A reciprocating refrigerant compressor includes a cylinder block having a cylinder bore, and a compression chamber defined within the cylinder bore. A cylinder head has a low-pressure chamber for receiving refrigerant gas to be drawn into the compression chamber, and is coupled to one end face of the cylinder block. A valve plate is arranged between the compression chamber and the low-pressure chamber, and includes an inlet port for guiding the refrigerant from the low-pressure chamber into the compression chamber. An inlet valve opens and closes the inlet port and has an end whose shape is adapted to a shape of the inlet port. The shape of the inlet port is non-circular, and a portion of an opening edge of the inlet port protrudes into the inlet port. Tangential lines drawn from the protruding portions intersect the opening edge of the inlet port at at least two points.

The invention discloses a control method for the rotating speed of an outdoor fan of an air conditioner, the air conditioner and a storage medium. The method comprises the steps that the pipe temperature of a first inner pipe at the current moment is recorded when the operation of the air conditioner meets a differential pressure condition and the current operation frequency reaches a preset threshold value, and the rotating speed of the outdoor fan of the air conditioner is reduced by one preset value; the pipe temperature of a second inner pipe is recorded after the rotating speed of the outdoor fan of the air conditioner is reduced, and when the difference value between the pipe temperature of the first inner pipe and the pipe temperature of the second inner pipe is larger than or equalto a first preset temperature value, the operating frequency reduced by one preset value is kept unchanged. According to the control method for the rotating speed of the outdoor fan of the air conditioner, the air conditioner and the storage medium, the condensing pressure is increased by reducing the rotating speed of the outdoor fan of the air conditioner, and the pressure difference is increased, so that the refrigerant flow is increased; and the optimal rotating speed value is determined by reducing the pipe temperature of the inner pipes before and after the rotating speed of the outer fan is reduced, and therefore the refrigerating capacity is improved.

The invention belongs to the technical field of air conditioners, and particularly provides an air conditioning unit with a compressor cooling branch and a compressor cooling control method. The air conditioning unit with the compressor cooling branch and the compressor cooling control method aim to solve the problem that an existing mode for reducing the exhaust temperature of a compressor is notgood. For the reason, the air conditioning unit comprises a main circulation loop, the compressor, an outdoor coil and an indoor coil, wherein the compressor, the outdoor coil and the indoor coil arearranged on the main circulation loop, the compressor is provided with an air supplementing port, at least a part of the compressor cooling branch is attached to the compressor so that a refrigerantin the compressor cooling branch can primarily cool the compressor outside the compressor, one end of the compressor cooling branch is connected with the air supplementing port, the other end of the compressor cooling branch is connected with a liquid pipe so that the refrigerant in the compressor cooling branch can enter the compressor to secondarily cool the compressor. According to the air conditioning unit with the compressor cooling branch and the compressor cooling control method, through primary cooling, pre-cooling is achieved, and then through secondary cooling, the temperature of thecompressor is further reduced, so that the cooling effect of the compressor is improved to the greatest extent conveniently, and the heat exchange efficiency of the air conditioning unit is guaranteed.