32results about How to "Good defrosting effect" patented technology

The invention discloses a defrosting method of a multi-combination type air conditioning unit. The defrosting method comprises that starting operation is carried out, temperature T0 of a frosted side of a coil pipe of an outdoor heat exchanger (1) of each outdoor machine is measured, when T0 of a certain outdoor machine is judged to be lower than -12 degrees, an air conditioning main controller sends a defrosting command to start to defrost the outer machine, reversing direction is carried out on a four-way reversing valve (2) and rotation of an outdoor fan is stopped at the same time, the outer fan is operated in an inverted mode, when a defrosting temperature sensor of the outdoor machine for carrying out defrosting detects temperature of a defrosting side of the coil pipe of the outdoor heat exchanger (1) of the outdoor machine to be larger than or equal to 12 degrees, defrosting is finished, after frequency of an inverter compressor (3) of the outdoor machine is reduced to reversing frequency, the frequency is kept being operated for 10 seconds, then the four-way reversing valve (2) is reversed in direction, and the whole air conditioning unit is switched back to be operated in a heating mode. The defrosting method is short in defrosting time, high in defrosting efficiency and rapid in defrosting speed.

The invention provides a controlling method for defrosting of an air conditioner. The air conditioner has a heating mode and a defrosting mode started after a preset triggering condition is met when the air conditioner is operated in the heating mode. The controlling method comprises the steps that when the air conditioner is operated in the heating mode, the coil temperature of an indoor heat exchanger is continuously detected; when the preset triggering condition is met, an air conditioner self-heating mode is switched to the defrosting mode, and time of switching the heating mode in this time to the defrosting mode of the air conditioner is calculated, and the time is called the heating mode time Sy; when the air conditioner finishes defrosting, the time of running the defrosting mode of the air conditioner in this time is obtained, and the time is called the defrosting mode time Sc; and the dynamic triggering condition for entering in the defrosting mode of the air conditioner for the next time is determined according to the coil temperature, the heating mode time Sy and the defrosting mode time Sc. The controlling method for defrosting of the air conditioner can adjust the triggering condition for entering the defrosting mode for the next time so that the air conditioner can defrost at the most suitable time, and the defrosting effect is optimum.

The invention provides an air conditioner system which comprises a first four-way reversing valve and a second four-way reversing valve. The first four-way reversing valve comprises a D1 port, an E1 port, an S1 port and a C1 port, wherein the D1 port is communicated with an outlet of a compressor, the E1 port is communicated with a first port of a phase change heat accumulator, the S1 port is communicated with an inlet of a gas-liquid separator, and the C1 port is communicated with a first port of an outdoor heat exchanger. The second four-way reversing valve comprises a D2 port, an E2 port, an S2 port and a C2 port, wherein the D2 port is communicated with the outlet of the compressor, the E2 port is communicated with a first port of an indoor unit, and the S2 port is communicated with the inlet of the gas-liquid separator. An outlet of the gas-liquid separator is communicated with an inlet of the compressor. A second port of the phase change heat accumulator is in serial connection with a defrosting electronic expansion valve and is communicated with a second port of the indoor unit, and a second port of the outdoor heat exchanger is connected between the defrosting electronic expansion valve and the second port of the indoor unit. The air conditioner system can improve heating and defrosting effects.

The invention provides a refrigerator and a defrosting control method thereof. The method adjusts voltage applied to an electromagnetic defrosting device according to the surface temperature of an evaporator. When the surface temperature of the evaporator is increased by a certain temperature value at each time, the voltage applied to the electromagnetic defrosting device is reduced, so that the power of the electromagnetic defrosting device is reduced. In the defrosting control method, when the surface of the evaporator is thicker in accumulated frost and lower in temperature, the electromagnetic defrosting device is operated with high power, so that the defrosting efficiency is improved; and when the surface of the evaporator is few in accumulated frost and higher in temperature, the electromagnetic defrosting device is operated with low power, so that quicker surface temperature rise of the evaporator is prevented. The method determines the operation power of the electromagnetic defrosting device according to specific defrosting conditions of the evaporator, guarantees normal and stable surface temperature rise of the evaporator, improves the defrosting efficiency, and optimizesthe working process of the electromagnetic defrosting device.

The invention provides an operation control method, a control device, an air conditioner and a computer readable storage medium. The operation control method comprises the steps of that the air conditioner runs in a heating mode, and according to the obtained working condition parameters, whether the heating mode is switched to a defrosting mode or an electric auxiliary heating assembly is startedin the heating mode can be determined; and in the defrosting mode, a four-way valve is controlled to maintain unchanged conduction direction, and a control valve between an indoor heat exchanger andan outdoor heat exchanger is controlled to open, thus allowing a corresponding bypass pipeline to be communicated. According to the technical scheme, under the phrase that the frosting risk is detected but the defrosting condition is not reached, the heating effect of the air conditioner is reduced due to the limitation of frosting, so that the electric auxiliary heating assembly can be started toimprove the heating effect under the working condition with existing frosting risk, thus improving the air outlet temperature of an indoor unit and the room heating effect.

The invention relates to an air conditioning plant and a control method thereof. The air conditioning plant comprises a compressor, an indoor heat exchanger, a first throttling device and an outdoor heat exchanger, which are connected in order so as to form a refrigerant main loop, wherein the compressor is used for compressing and exhausting a sucked refrigerant, and the indoor heat exchanger is used for enabling the refrigerant to exchange heat with indoor air; the first throttling device is used for throttling the refrigerant flowing out from the indoor heat exchanger and reducing pressure of the refrigerant, and the outdoor heat exchanger is used for enabling the refrigerant to exchange heat with outdoor air; the outdoor heat exchanger is provided with a first flowing path and a second flowing path, and the first flowing path and the second flowing path are used for enabling the refrigerant to flow past and are in parallel. The air conditioning plant further comprises a by-pass pipeline, and the by-pass pipeline is used for selectively enabling part of the refrigerant exhausted by the compressor to pass through in a branch mode to directly flow into the second flowing path, so that the heat of the part of the refrigerant is utilized to defrost the outdoor heat exchanger. The air conditioning plant realizes the defrosting and heating at the same time and improves the comfortable experience.

The invention discloses a variable-frequency heat pump air conditioner and a defrosting control method thereof. The defrosting control method comprises the following steps: step I of controlling an upper limit value of defrosting frequency according to a liquid tube temperature of an outdoor heat exchanger before defrosting starts; step II of controlling changes of the defrosting frequency according to liquid tube temperature rise speed of the outdoor heat exchanger in a defrosting process; and step III of keeping the current defrosting frequency to operate until exiting a defrosting operationmode when the liquid tube temperature of the outdoor heat exchanger is greater than or equal to a preset frequency-modulating stop temperature value P. The variable-frequency heat pump air conditioner can reasonably control defrosting frequency in a defrosting process of the air conditioner, reduces influences, on use comfort, of the defrosting process, and saves energy consumption during a defrosting period.

The invention provides a defrosting control method of an air conditioner and an outdoor unit thereof. In the defrosting control method, a heating index temperature of an indoor unit is continuously monitored; and a mean value of the heating index temperature in a heating time period is calculated according to the heating index temperature. The mean value expresses the mean heating capacity of theair conditioner in the whole heating process; and when the mean value is lowered, an optimal defrosting beginning point of a heat exchanger of the outdoor unit is reached. When the heating index temperature is lower than the mean value of the heating index temperature, the outdoor unit of the air conditioner is defrosted, so that the optimal defrosting effect can be achieved. The defrosting methodcan defrost in the optimal time point, prevents frequent defrosting of the air conditioner to save the energy, guarantees the heating effect of the air conditioner, and improves the use experiences of users.

The invention provides an air-cooling refrigerator and a defrosting control method for an evaporator of the air-cooling refrigerator. The defrosting control method for the evaporator of the air-cooling refrigerator comprises the steps that it is determined that the air-cooling refrigerator enters the defrosting process; when the evaporator reaches the preset defrosting stopping condition, defrosting is stopped, the situation that steam formed through defrosting is condensed into water is waited, and the water is discharged out of an evaporator chamber of the air-cooling refrigerator; in the waiting process, humidity in the evaporator chamber is detected, and whether the humidity is lower than the preset humidity threshold value or not is judged; and if the humidity is lower than the preset humidity threshold value, the waiting process is ended, and the air-cooling refrigerator is allowed to enter the refrigerating process. According to the scheme, the end point of the waiting process after defrosting is set according to the humidity in the evaporator chamber, the situation that a compressor shuts down for a too long time, and consequently refrigeration is affected is avoided, secondary frosting caused by insufficient moisture exhausting in the evaporator is avoided as well, and therefore the best defrosting effect is achieved.

The invention discloses a heat pump system and a control method for the heat pump system. A cold medium flowing loop of the heat pump system is provided with a compressor, an outdoor heat exchanger, an indoor heat exchanger and a throttling device, and the heat pump system further comprises an indoor assistant heating device and a bypass branch loop. The indoor assistant heating device is used forperforming assistant heating when the heat pump system runs in a defrosting mode, and when the heat pump system runs in the defrosting mode, the indoor assistant heating device runs and performs heating; and the bypass branch loop together with the compressor and the outdoor heat exchanger form a defrosting loop, a cold medium discharged by the compressor is made not flow through the indoor heatexchanger but enters the outdoor heat exchanger to perform defrosting. According to the heat pump system and the control method for the heat pump system provided by the invention, the cold medium doesnot flow through the indoor heat exchanger in the defrosting mode, therefore the indoor assistant heating device can be started to perform heating on the indoor environment when the defrosting is performed, the comfort of the indoor environment in the defrosting mode is guaranteed, and the good defrosting effect can be maintained at the same time.

The invention provides an air conditioner, a defrosting control method and a defrosting control system. The air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a four-way valve, a throttling device, a heat accumulating assembly and a stop valve, wherein the heat accumulating assembly is arranged between the four-way valve and the outdoor heat exchanger, comprises a heat accumulator, a water feeding device, an electric heating piece, a first temperature detecting device and a second temperature detecting device; and the stop valve is arranged between the four-way valve and the outdoor heat exchanger, and is connected in parallel with the heat accumulating assembly. According to the air conditioner disclosed by the invention, the heat accumulating assembly enables the air conditioner to perform defrosting under a heating mode, so that the favorable defrosting effect and the favorable heating effect are guaranteed, and the usage comfort of users is improved; when heat accumulating materials are short of water and the defrosting effect is poor, the water can be supplied by the water feeding device, and the four-way valve is switched, so that the air conditioner performs defrosting under a refrigeration mode, and the favorable defrosting effect is guaranteed; and after water supply is completed, the four-way valve is switched, so that the air conditioner performs defrosting under the heating mode, and the usage comfort of the users is improved.

The invention provides a defrosting method of an air conditioner. The method comprises the following steps: detecting the pressure valve of a heating high-pressure pressure sensor of the air conditioner; obtaining the corresponding saturated temperature value Pd_t according to the pressure value; obtaining the outdoor side ambient temperature Tao of the air conditioner; detecting the external unittemperature Tdef of the air conditioner; and judging whether the saturated temperature value Pd_t, the external unit temperature Tdef and the outdoor side ambient temperature Tao meet defrosting conditions or not, and if yes, entering a defrosting mode. Compared with the prior art, the defrosting method has the advantages that the defrosting mode can be started at a proper time point, accurate defrosting is carried out, the defrosting effect is improved, and the use comfort of users is improved.

The invention relates to an air-conditioner and a defrosting method and a defrosting device thereof. The defrosting method comprises the steps that after starting of a compressor is completed, running time T1 of the compressor is recorded; when the time T1 is equal to preset time T, a suction pressure value or an evaporation pressure value is detected; when the suction pressure value or the evaporation pressure value is smaller than a preset pressure value, a running pressure specific value of the air-conditioner and continuous time T2 of the air-conditioner are detected; when the pressure specific value and / or the continuous time T2 and a preset pressure specific value meet the defrosting condition, the air-conditioner is controlled to carry out defrosting, thus, frequent defrosting can be avoided, the period of carrying out defrosting in a severe frosting environment can be shortened, intelligent defrosting can be achieved effectively, the good defrosting effect is achieved, a unit can be protected, and reliable running of the unit can be achieved.

The invention relates to a pre-installed automotive windshield heating film based on the graphene technique. The pre-installed automotive windshield heating film adheres to the inner surface of an automotive windshield to be used for defrosting the automotive windshield. The pre-installed automotive windshield heating film comprises a graphene heating film body (9) and a controller, wherein the graphene heating film body (9) adheres to the inner surface of the automotive windshield and is connected with the controller, and the controller is integrated in an original automobile control system and controls the graphene heating film body (9) to emit far infrared radiation waves and adjusts the temperature of the graphene heating film body (9). Compared with the prior art, the pre-installed automotive windshield heating film has the advantages of being simple in structure, reasonable in arrangement, convenient to operate, capable of saving energy and protecting the environment and the like.

The invention discloses a vortex tube defrosting system for a heat pump type passenger car air conditioner system. The vortex tube defrosting system comprises a reducing tube, a vortex chamber, a compressor, a throttle valve, a defrosting assembly and a cooling assembly. The reducing tube communicates with the vortex chamber. The vortex chamber communicates with a heat pipeline of the defrosting assembly through a vortex heat tube. A control valve is arranged between the vortex heat tube and the heat pipeline. The vortex chamber communicates with a cold pipeline of the cooling assembly through a vortex cold tube. A solenoid valve is arranged on the cold pipeline. An inlet of an evaporator of the defrosting assembly communicates with an outlet of the compressor. An outlet of the evaporator communicates with an inlet of a condenser of the cooling assembly through the throttle valve. An outlet of the condenser communicates with an inlet of the compressor. The outer surface of a passage car evaporator coil is slow in frosting and remarkable in defrosting effect, and the good energy-saving effect and the high economy are achieved; and the prominent problems that when an existing heat pump type passenger car air conditioner system operates in the too low outdoor temperature in winter, the system cannot achieve normal heating, defrosting of an evaporator is frequent, and defrosting is not thorough are solved.

The invention relates to a heating windshield system based on the graphene technique. The system has an automotive glass defrosting function and comprises an automotive windshield, a graphene heating film component and a heating controller, wherein the graphene heating film component and the heating controller are connected, the graphene heating film component comprises a graphene heating piece and an adhesive membrane used for encapsulating the graphene heating piece, the graphene heating film component is attached to the inner side of the automotive windshield through the adhesive membrane, and the heating controller controls the working state and temperature of the graphene heating film component to heat the automotive windshield during defrosting. Compared with the prior art, the system has the advantages that heating is quick, and environment protection and energy saving are realized.

The invention relates to an air-conditioner, an air-conditioner external unit, an air-conditioner external unit defrosting device, and an air-conditioner external unit defrosting control method and system. The air-conditioner external unit defrosting device comprises an air passage, a heating piece arranged in the air passage and a driving piece arranged in the air passage; the air passage is provided with an air inlet and an air outlet, and the driving piece can drive airflow to flow to the air outlet from the air inlet; the heating piece can heat the airflow in the heating air channel, and the air outlet of the air channel faces a heat exchange pipe of the air-conditioner external unit. Normal running and the heat exchange effect of an external heat exchanger are guaranteed, and then theheating effect of the whole air-conditioner is guaranteed; the effect of the defrosting device is more direct, and the defrosting effect and efficiency are better; moreover, the operation of switching of the flow direction of a heat exchange agent in an air-conditioning system for defrosting is avoided, thus an evaporator is prevented from absorbing indoor heat, decrease of the indoor temperatureis avoided, the stability and comfort of the indoor temperature are improved, defrosting and heating can be conducted simultaneously, and the heating efficiency and defrosting efficiency are improved.

The invention relates to an efficient air conditioner and a method for improving defrosting efficiency of a condenser of the air conditioner. The air conditioner comprises a compressor, a four-way reversing valve, an indoor heat exchanger, an expansion valve and an outdoor heat exchanger, which are connected in turn; a heating defrosting loop is arranged between the compressor and the outdoor heat exchanger, and consists of a defrosting tube, a control valve and a current limit device; one end of the defrosting tube is connected with an output end of the compressor; the defrosting tube is connected with the control valve and the current limit device in turn along an outlet of the compressor; and one end of the current limit device is connected with an inlet of a heating cyclic working condition of the outdoor heat exchanger to form a circulation loop with the compressor. The efficient air conditioner has the advantages that the air conditioner has high energy efficiency ratio compared with the prior electric heating wire to defrost; and length and inner diameter of a capillary tube are adjusted according to the used environmental temperature, so as to achieve optimal defrosting effect.

The invention relates to a control method and a control device for air conditioner defrosting and an air conditioner. The control method comprises the steps that when the air conditioner operates in aheating mode, the outdoor coil pipe temperature, the outdoor environment temperature and the water temperature in a water storage device based on the air conditioner are obtained; and the flow opening degree of a control valve is controlled according to the outdoor coil pipe temperature of an outdoor unit, the outdoor environment temperature and the water temperature in the water storage device,so that the water temperature in the water storage device meets the defrosting water temperature condition. According to the provided control method for air conditioner defrosting in the embodiment, aheating device is controlled according to the outdoor coil pipe temperature, the outdoor environment temperature and the water temperature of the water storage device to enable the water temperaturein the water storage device to meet the preset defrosting water temperature condition, thus, spraying water in the defrosting mode executing process of the air conditioner can always meet the water temperature requirement for achieving the good defrosting effect, and occurrence of the problem that in the related technology, the defrosting effect is affected due to the fact that the water temperature is uncontrollable due to the influence of the outdoor environment is effectively reduced.

The invention relates to the technical field of air-conditioner defrosting and discloses a control method for the air-conditioner defrosting. The control method comprises the steps that under the situation of an air conditioner needing to be defrosted, the running rotating speed of an outdoor air fan and / or an indoor air fan of the air conditioner is controlled to be reduced; the outdoor coil pipetemperature, the refrigerant liquid outlet temperature and the upper-portion shell temperature of outdoor heat exchangers are obtained; and under the situation of the outdoor coil pipe temperature, the refrigerant liquid outlet temperature and the upper-portion shell temperature meeting the defrosting quitting condition, reducing of the running rotating speed of the outdoor air fan and / or the indoor air fan is controlled to be stopped. According to the control method for the air-conditioner defrosting, the opportunity for the air conditioner quitting the defrosting is judged synthetically utilizing multiple temperature parameters of the outdoor heat exchangers, so that the control accuracy of controlling the air conditioner to quit the defrosting can be effectively improved; and by meansof adjusting operations on the indoor air fan and the outdoor air fan, the heat exchange rate between the heat exchangers corresponding to the indoor air fan and the outdoor air fan respectively and the external environment is changed, and the increasing influence of the temperature environment on the frosting degree is reduced. The invention further discloses a control device for the air-conditioner defrosting and the air conditioner.

The invention relates to an automatic ultrasonic defrosting device which comprises a shell. A refrigerating device is arranged in the shell and comprises a plurality of air coolers and an evaporator. The multiple air coolers are installed on one side of the shell. The evaporator comprises a plurality of cooling fins and a plurality of condensing pipes. An ultrasonic transducer device is arranged on one side of one air cooler and comprises an ultrasonic transducer and an ultrasonic generator. A frosting induction device is arranged on the other side of the shell and comprises a fixing part, an emitting device and a receiving induction device. The emitting device comprises a reflecting optoelectronic switch. The receiving induction device is arranged between the two corresponding cooling fins and located on the same straight line with the frosting induction device. By adoption of the automatic ultrasonic defrosting device, frosting can be automatically inducted, defrosting can be automatically conducted, the frosting condition of the air coolers is detected through the frosting induction device under the condition that the refrigerating effect is not stopped, the automatic ultrasonic defrosting device can automatically operate in a defrosting mode, the defrosting effect is good, and normal production is not affected, so that the production efficiency is high.

The invention provides an air conditioner defrosting control method and system, electronic equipment and a storage medium, and the method comprises the following steps: controlling an air conditioner to enter a defrosting mode under the condition that a defrosting condition is met; based on the frosting condition of the air conditioner, the operation frequency of a compressor and the operation state of the air conditioner are controlled and adjusted; wherein the operation state comprises a variable shunting state and a fixed shunting state; under the condition of the variable shunting state, a refrigerant in a heat exchanger of the air conditioner adjusts the shunting state in real time; and under the condition of the fixed shunting state, the shunting state of the refrigerant in the heat exchanger is fixed. According to the control method for defrosting of the air conditioner, under the condition that the defrosting condition is met, the air conditioner is controlled to enter the defrosting mode firstly, in the defrosting process of the air conditioner, based on the frosting condition of the air conditioner, the operation frequency of the compressor and the operation state of the air conditioner are controlled and adjusted, and the air conditioner is switched between the variable shunting state and the fixed shunting state; the shunting state of the heat exchanger is changed, so that the air conditioner achieves the optimal defrosting effect.

The invention discloses a flow-equalizing defrosting heat exchange device, which comprises a condenser, a liquid supply pipe, an evaporation copper pipe, an evaporator, a liquid separator, a fin heat exchanger and a press; the evaporation copper pipe is arranged in the fin heat exchanger; a liquid inlet end of the evaporation copper pipe is communicated with the liquid supply pipe through a first pipeline; a liquid outlet end of the evaporation copper pipe is provided with a second pipeline communicated with the evaporator; the evaporator is communicated with a liquid separator pipeline; the liquid separator is communicated with the fin heat exchanger through a flow dividing pipe; an air return pipe is communicated between the fin heat exchanger and the condenser; the press is arranged on the air return pipe; an air guide pipe is arranged at one end, close to the condenser, of the air return pipe; and the other end of the air guide pipe is communicated with the evaporator. A cooling medium enters the fin heat exchanger at a high speed along the flow dividing pipe, errors caused by uneven flow dividing of a traditional heat exchanger are reduced, and the "zebra phenomenon" is avoided; and part of exhaust heat of the press is directly used for defrosting at an evaporation temperature freezing point, so that evaporation is always in a non-freezing state.

The invention relates to the technical field of air conditioner defrosting, and discloses a control method and device for air conditioner defrosting and an air conditioner. The control method comprises the following steps: controlling to increase the flow opening degree of a throttling device of the air conditioner under the condition that the air conditioner needs to be defrosted; obtaining a refrigerant inlet liquid temperature difference value of an outdoor heat exchanger and a preset position temperature of the outdoor heat exchanger; and controlling to stop increasing the flow opening degree of the throttling device under the condition that the refrigerant inlet liquid temperature difference value and the preset position temperature meet the defrosting exit condition. The time for theair conditioner to exit the defrosting is comprehensively judged according to the refrigerant inlet temperature difference value and the preset position temperature of the outdoor heat exchanger, sothat the control precision for controlling the air conditioner to exit defrosting is effectively improved; and through increasing the flow opening degree of the throttling device and changing the refrigerant temperature and pressure in a refrigerant circulation loop, the refrigerant finally flowing into the outdoor heat exchanger for defrosting can achieve a relatively good defrosting effect.

The invention provides a cover plate, an air flue structure and a transporting tool, and belongs to the technical field of automobiles. The cover plate comprises a cover plate main body; after being assembled, one edge of the cover plate main body gets close to or abuts against a front windshield of the transporting tool; the cover plate main body is provided with a first air guiding part and a second air guiding part, an interval is reserved between the first air guiding part and the second air guiding part, and the first air guiding part is closer to the edge compared with the second air guiding part; and the first air guiding part is provided with one or more first air outlets for guiding air to the forward windshield, and the second air guiding part is provided with one or more secondair outlets for guiding air to the forward windshield. The first air outlets and the second air outlets are formed in the cover plate main body, and thus the air discharging area can be effectively increased; and through forming of the second air outlets, rebound of the first air outlets in the front windshield can be reduced, airflow flowing out of the second air outlets flows upwards, and the airflow flowing out of the second air outlets is easier to attach to the surface of the front windshield to flow upwards after being converged with airflow flowing out of the first air outlets, so thatthe very good defrosting effect is achieved.

The invention discloses a control method of a refrigerator. A temperature control system comprises a compressor, a first heat exchanger, a throttling element and a second heat exchanger, wherein the first heat exchanger is arranged close to a first chamber; the second heat exchanger is arranged close to a second chamber; the refrigerator comprises two air channels, a first air door and a second air door; the first chamber communicates with a third chamber through one of the two air channels, and the second chamber communicates with the third chamber through another air channel; the two air channels are correspondingly controlled to be opened and closed through the first air door and the second air door. The control method comprises the steps of starting the compressor; controlling a refrigerant to flow in forward direction and flow from the second heat exchanger to the first heat exchanger; refrigerating through the first chamber; heating through the second chamber; recording the length of time that the refrigerant flows in the forward direction as T1; controlling the refrigerant to flow in reverse direction and flow from the first heat exchanger to the second heat exchanger; heating through the first chamber; refrigerating through the second chamber; recording the length of time that the refrigerant flows in the reverse direction as T2; detecting the real-time temperature theta of the third chamber; and determining the difference between the real-time temperature theta and threshold temperature T0.

The invention relates to the technical field of air conditioner defrosting, and discloses a control method for air conditioner defrosting. The control method comprises the following steps that a firstcurrent liquid inlet temperature and a first current liquid outlet temperature of an outdoor heat exchanger of an air conditioner are acquired in the condition that the air conditioner enters a bypass defrosting mode; and if the first current liquid inlet temperature and a first current refrigerant liquid outlet temperature meet a refrigerant temperature condition, a liquid inlet refrigerant of the outdoor heat exchanger is controlled to be heated. According to the control method, under the condition that the air conditioner enters the bypass defrosting mode, the liquid inlet refrigerant of the outdoor heat exchanger is heated according to the difference condition of the liquid inlet temperature and the liquid outlet temperature of the outdoor heat exchanger, so that the refrigerant flowing into the outdoor heat exchanger can be heated to a higher temperature, and the problem that the defrosting capacity of the air conditioner is reduced over time due to the operation of the bypass defrosting mode is reduced. The invention further discloses a control device for air conditioner defrosting and an air conditioner.

The invention relates to a control method and a control device for air conditioner defrosting and an air conditioner. The control method comprises the steps that the outdoor environment temperature corresponding to the air conditioner is obtained; and according to the outdoor environment temperature corresponding to the air conditioner, the air conditioner is controlled to start a heating device,so that the water temperature in a water storage device meets the defrosting water temperature condition. According to the provided control method for air conditioner defrosting in the embodiment, theheating device is controlled according to the outdoor environment temperature to enable the water temperature in the water storage device to meet the preset defrosting water temperature condition, thus, spraying water of the air conditioner in the defrosting mode executing process can always meet the water temperature requirement for achieving the good defrosting effect, and occurrence of the problem that in the related technology, the defrosting effect is affected due to the fact that the water temperature is uncontrollable due to the influence of the outdoor environment is effectively reduced.

The invention particularly relates to a defrosting control method for an air conditioner, which combines the temperature and time conditions of an outdoor heat exchanger of an air conditioner system with the driving current of a direct current motor to carry out accurate defrosting control, and can further remove defrosting water, foreign matters and the like on the surface of the outdoor heat exchanger through the reverse rotation of the motor. And the best defrosting effect is achieved. The temperature sensor of the heat exchanger and the driver of the direct-current motor continuously feed back data to the controller of the air conditioner, the direct-current motor can rotate reversely, and the direct-current motor can feed back data such as driving current and rotating speed to the controller of the outdoor unit of the air conditioner at the same time by modifying an existing FG signal port. According to the control method, whether the heat exchanger is blocked or not is judged, the temperature and time conditions of the heat exchanger and the driving current of the direct current motor are jointly judged, mistaken defrosting is reduced to the maximum degree, and accurate defrosting is achieved.