61results about How to "Improve low temperature heating performance" patented technology

The invention provides a compressor winding heating control method and device. The method comprises the following steps: the exhaust temperature of a compressor is obtained; and the heating current ofcompressor windings is adjusted according to the exhaust temperature. Through heating of the compressor windings, heat of refrigerants is absorbed to transfer to an indoor unit evaporator through thewindings, so that the low-temperature heating capacity is improved.

The invention discloses an air-supplying enthalpy-adding heat pump air conditioning system capable of promoting the heat exchange performance of heat exchangers. The air-supplying enthalpy-adding heat pump air conditioning system capable of promoting the heat exchange performance of the heat exchangers comprises an air-supplying enthalpy-adding compressor, a four-way valve, an outdoor side heat exchanger, an indoor side heat exchanger, an air-liquid separator and a double-direction spiral flash vessel, an air outlet pipe is arranged on the side wall of a barrel of the upper section of the double-direction spiral flash vessel, and a first refrigerant inlet and outlet pipe and a second refrigerant inlet and outlet pipe which extend to an inner cavity of the barrel are arranged on the side wall of the barrel at the lower end; the air outlet pipe is connected with a first magnetic valve and an air-supplying opening of the air-supplying enthalpy-adding compressor in sequence and simultaneously connected with a second magnetic valve and the air-liquid separator in sequence, the first refrigerant inlet and outlet pipe is connected with a first expansion valve and the outdoor side heat exchange in sequence, and the second refrigerant inlet and outlet pipe is connected with a second expansion valve and the indoor side heat exchange in sequence. According to the air-supplying enthalpy-adding heat pump air conditioning system capable of promoting the heat exchange performance of the heat exchangers, not only can heating air-supplying be achieved, but also high-temperature refrigeration air-supplying can be achieved, on the normal temperature refrigeration working condition that air-supplying is not needed, the flash vessel serves as the air-liquid separator, the air phase ratio of refrigerant at an inlet of each heat exchanger is reduced, and the heat exchange performance of the heat exchangers is promoted.

The invention provides an air-conditioning outdoor unit condenser which comprises three rows of condenser components, an air inlet pipe assembly, an elbow, a three-way assembly, an air outlet assembly and a main outlet pipe, wherein the air inlet pipe assembly is located at the leeward side of the condenser, and the air outlet pipe assembly is located at the windward side of the condenser; and the condenser comprises a plurality of flow branches, each flow branch comprises two sequentially adjacent branch inlet routes, a plurality of U-shaped inner-thread copper pipes, elbows, three-way assemblies and one branch outlet route through connection, the quantity of the branch inlet routes is an even number, the quantity of the branch outlet routes is 1/2 of that of the branch inlet routes, and the bottommost part of the flow branch is the supercooling section of the condenser. The invention also provides an air-conditioning outdoor unit using the condenser. Experimental tests show that the rated heating capacity, the low-temperature heating capacity and the energy efficiency ratio of the air-conditioning outdoor unit using the condenser are greatly increased, and the heating quantity is increased by 5-10%.

The invention provides a control method and device for heating a compressor winding. The method comprises the following steps: acquiring the outdoor environment temperature and the indoor temperature;and adjusting the heating current of the compressor winding according to the outdoor environment temperature and the indoor temperature. A refrigerant absorbs and transfers heat to an evaporator of an indoor unit through the winding as the compressor winding heats, so that the low-temperature heating capacity is improved.

The invention provides a method and device for controlling an expansion valve of an enhanced vapor injection system and a storage medium, and belongs to the field of electrical equipment. The method comprises the following steps that superheat degree changes of a jet opening of a compressor are detected; when the superheat degree is not in the preset range, the preset opening value of the auxiliary electronic expansion valve is increased or decreased; when the preset opening value of the auxiliary electronic expansion valve is increased, electric current of an air conditioning outdoor unit is detected; when the electric current is less than the preset electric current value, the preset opening value of the auxiliary expansion valve is increased again; when the electric current is greater than the preset electric current value, the frequency of the electric current is reduced until the electric current is less than the preset electric current value, and the preset opening value of the auxiliary expansion valve is increased again; and the above operation is repeated until the superheat degree is in the preset range. According to the above technical scheme, the superheat degree of the jet opening of the compressor can be made to be in the preset range, and excessive current of the outdoor unit is avoided.

The invention provides a method and a device for controlling the heating of a compressor winding. The method comprises the following steps: obtaining the power of a compressor; adjusting the heating current of the compressor winding according to the power. The invention can realize constant power control through the heating function of the compressor winding in the heating process of the defrosting cycle, thereby improving the low-temperature heating capacity.

The invention discloses a bi-directional spiral flash vessel applied to an air-supplementing and enthalpy-increasing heat pump air-conditioning system. The flash vessel comprises a barrel body, the barrel body comprises an upper-segment barrel body, an intermediate-segment barrel body and a lower-segment barrel body from top to bottom, an air outlet pipe is arranged on the side wall of the upper-segment barrel body, a first cooling agent inlet and outlet pipe and a second cooling agent inlet and outlet pipe which extend to an inner cavity of the barrel body are arranged on the side wall of the lower-segment barrel body, the portions, inserted into the barrel body, of the first cooling agent inlet and outlet pipe and the second cooling agent inlet and outlet pipe are spiral copper pipe portions both of which spirally extend upward clockwise or anticlockwise, and the two spiral copper pipe portions are assembled in a coiled mode so as to jointly form a gas-liquid separation device. By means of the bi-directional spiral flash vessel, the limit of unidirectional flow of an existing flash vessel is broken through, the bi-directional flowability is achieved, the air-supplementing and enthalpy-increasing system can be greatly simplified, meanwhile, the gas-liquid separation effect of the flash vessel is guaranteed and improved, and the bi-directional spiral flash vessel is applicable to an application occasion where the installation height of the flash vessel is limited and the specific value between the height and the diameter is small.

The invention relates to a high heat unit, and a method, system and air condition for controlling the unit. According to the invention, a condensation side inlet and an evaporation side inlet of an intermediate heat exchanger are both connected with an indoor heat exchanger. A condensation outlet of the intermediate heat exchanger is connected with an outdoor heat exchanger. The evaporation side outlet of the intermediate exchanger is connected with a gas liquid separator. A pipeline connecting the evaporation side inlet of the intermediate heat exchanger with the indoor heat exchanger is provided with a third throttling device. A second throttling device is arranged on a pipeline connecting a condensation outlet of the intermediate exchanger and the outdoor heat exchanger. According to the invention, by adopting a method of heating low-pressure side cold medium by utilizing the intermediate heat exchanger and by controlling the opening degrees of the throttling devices based on a specific logic, the integral evaporation pressure and the evaporation temperature of the system are improved, the cold medium heat energy after condensation is utilized effectively, the integral heat exchange volume of the unit is improved and the low temperature heating capability is enhanced.

The invention discloses a compressor and a heat exchange system comprising the same. The compressor comprises a shell, a liquid reservoir, a compressing mechanism, a medium-pressure air sucking pipe and a driving mechanism, wherein the shell is provided with a vent; the liquid reservoir is arranged outside the shell; the compressing mechanism is arranged inside the shell and comprises a rotary compressing structure and a reciprocating compressing structure; the rotary compressing structure is communicated with the liquid reservoir; the medium-pressure air sucking pipe is arranged outside the shell and is communicated with the reciprocating compressing structure; the driving mechanism is arranged inside the shell and is in transmission connection with the rotary compressing structure and the reciprocating compressing structure respectively. The compressor disclosed by the invention is good in heating effect at low temperature, high in running efficiency, also simple in structure, low in production cost and high in performance-to-cost ratio.

The invention provides a low-temperature air conditioning system and an air conditioner. The low-temperature air conditioning system comprises a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger and a throttling device; a first valve port of the four-way valve is connected with the compressor; a second valve port of the four-way valve is connected with the indoor heat exchanger; and a third valve port of the four-way valve is connected with the outdoor heat exchanger. The low-temperature air conditioning system further comprises an auxiliary heat exchanger connected with the outdoor heat exchanger, a first separator, a first valve and a second valve, wherein a first port of the first separator is connected with the auxiliary heat exchanger; a second port of the first separator is connected with the indoor heat exchanger; a third port of the first separator is connected with the outdoor heat exchanger, is connected with the second port in parallel, and is communicated with the indoor heat exchanger; the first valve is arranged on a pipeline for communicating the second port of the outdoor heat exchanger with the third valve port of the four-way valve; and the second valve is arranged on a pipeline for communicating the third port with the third port of the indoor heat exchanger. The low-temperature air conditioning system can control the refrigerant circulating quantity to enhance the low-temperature heating effect thereof.

The invention discloses a non-azeotropic working medium hot pump system with adjustable concentration and a running method thereof. The system mainly includes a compressor, a four-way valve, an outdoor heat exchanger, a flow direction switching device, a component regulating device, a system expansion valve and an indoor heat exchanger. Through arranging the component regulating device, the component separating tank, the corresponding linking pipe and the valve, the quasi-second-grade compression, fluid injection and system working medium concentration adjustment and other functions can be realized. Through the comprehensive application of the non-azeotropic working medium, gas supplementation, and component concentration adjusting technology, the hot pump system can improve the heating amount and COP of the hot pump under the low-temperature condition, improve the seasonal energy efficiency level of the hot pump device, and effectively control the exhaust temperature of the compressor under the low-temperature working condition.

The invention discloses a thermal management system used for an electric automobile. The thermal management system comprises an air conditioner heat pump system and a battery and motor heat conductionsystem. The air conditioner heat pump system comprises a compressor, a compartment condenser, a first extra-compartment heat exchanger, a compartment evaporator, a first heat exchanger, a heat accumulator, a gas-liquid separator and multiple valve bodies. The battery and motor heat conduction system comprises a battery heat exchange module, a motor heat exchange module, a liquid pump, a second extra-compartment heat exchanger, a second heat exchanger and multiple valve bodies. The air conditioner heat pump system and the battery and motor heat conduction system store and exchange energy through the heat accumulator and the first heat exchanger. Various thermal management modes of refrigerating, heating, dehumidification, heat dissipation of a battery and a motor and the like of the electric automobile can be achieved, and on the foundation that energy is saved, the comfort of a compartment and the safety of the battery and the motor are guaranteed.

The invention discloses a rectifying tower type variable concentration non-azeotropic working medium hot pump system and a running method, and belongs to the technical field of a hot pump air conditioner. The system mainly includes a compressor, a four-way valve, an outdoor heat exchanger, a flow direction switching device, a component regulating device, a stored fluid heat regenerator, a system expanding valve, an indoor heat exchanger, a three-way valve and a corresponding linking pipe. Through arranging the component separating tank, the system storage fluid heat regenerating tank, the corresponding linking pipe and the valve, the quasi-secondary-grade compression, fluid injection, concentration adjustment of system working medium and other functions can be realized. Through the comprehensive application of non-azeotropic working medium, gas supplementation, injection and component concentration adjusting technology, the hot pump system can improve the heating amount and COP of the hot pump under the low temperature condition, increase the seasonal efficiency level of the hot pump device, and effectively control the exhaust temperature of the low-temperature condition of the compressor.

The invention discloses a low-temperature heating refrigerant flow rate matching control method and an air conditioner. The low-temperature heating refrigerant flow rate matching control method comprises the following steps that S1, the air conditioner enters a heating mode, whether a condition of entering defrosting control is achieved or not is judged, and if the condition is achieved, S2 is executed; S2, the air conditioner performs defrosting operation, when defrosting is finished, an electronic expansion valve recovers an initial opening degree, defrosting timing is started, and after thedefrosting time is achieved with defrosting timing, S3 is executed; S3, valve regulation timing is started; S4, after a regulation time of the expansion valve is achieved with regulation timing, theelectronic expansion valve performs one-step valve closing, and whether the opening degree of the electronic expansion valve is declined to a lower limit opening degree or not is judged, and if the opening degree of the electronic expansion valve is not declined to the lower limit opening degree, S5 is executed; S5, whether the condition of entering defrosting control is achieved or not is judged,and if the condition is achieved, S6 is executed; S6, the opening degree of the electronic expansion valve is kept invariable; and S7, when the condition of entering defrosting control is achieved ornot is judged, the step S2 is executed, or otherwise, the step 6 is executed. By adopting the low-temperature heating refrigerant flow rate matching control method provided by the invention, the refrigerant flow rate in the defrosting process and the heat exchange ability of an evaporator perform dynamic matching, the low-temperature heating ability is improved, the defrosting period is prolonged, the energy consumption is lowered, noise pollution is reduced, and the use comfort is improved.

The invention relates to the field of air conditioner control, and provides a refrigerant flow control method for solving the problem that during low-temperature heating of a frequency conversion heatpump air conditioner, control over the refrigeration flow and the heat exchange capacity of an outdoor heat exchanger are not matched. The method comprises the steps that S1, after heating begins, whether the outdoor heat exchanger reaches the defrosting control condition or not is judged, if yes, the S2 is executed; S2, defrosting operation is carried out, after the defrosting is finished, an expansion valve is controlled to be recovered to the initial opening degree, the frosting time and the running duration after defrosting begin to be subjected to time keeping, and the S3 is executed; S3, when the frosting time reaches the preset frosting time, the S4 is executed; S4, valve adjusting time begins to time keeping, when the pressure adjusting time reaches the preset valve adjusting time, the opening degree of the expansion valve is controlled, the preset opening degree interval is reduced, the running duration after defrosting is subtracted from the preset valve adjusting time, andthe result is divided by the preset coefficient; S5, whether the outdoor heat exchanger reaches the defrosting control condition or not is judged, if yes, the S2 is executed, if not, the S4 is executed. The method is suitable for the control over the low-temperature heating mode of the frequency conversion heat pump air conditioner.