68results about How to "Guaranteed defrosting effect" patented technology

The invention provides a base plate structure for an outdoor unit of an air conditioner, the outdoor unit of the air conditioner, the air conditioner and a defrosting control method for the air conditioner. The base plate structure for the outdoor unit of the air conditioner comprises an outdoor unit base plate, a base plate electric heating element and a drainage part, wherein a compressor fixing support is arranged on the outdoor unit base plate, and a condenser is installed on the outdoor unit base plate; the base plate electric heating element is arranged at the bottom of the condenser and located above the outdoor unit base plate; and the drainage part is arranged on the outdoor unit base plate and comprises at least one main drainage port, and the main drainage port is located below the base plate electric heating element. By adopting the base plate structure, when the air conditioner is heated for defrosting at a lower outdoor temperature, frost on the condenser and the outdoor unit base plate can be quickly and thoroughly thawed, and the thawed water quickly and smoothly flows out of the main drainage port, so the frost is thawed cleanly and thoroughly, the temperature of an indoor air port is improved, a good heating effect is guaranteed, and the market competitiveness of the product is improved.

The invention provides a hot-gas bypass defrosting system for a variable-frequency air conditioner. Firstly, the exhaust pipe, return gas pipe and condenser coil of a compressor are provided with a temperature detector respectively and are connected with a microcomputer; the temperature detectors transmit detected temperature data into the microcomputer, the microcomputer analyzes and compares received data and controls the progress of hot-gas bypass by detecting the change in exhaust temperature, return gas temperature and condenser coil intermediate temperature parameters according to the characteristic that the variable-frequency air conditioner can intelligently control the operation of a compressor in actual operation. Thus, the phenomenon that defrosting capacity is insufficient in a later half defrosting course is avoided when overlong hot gas bypass time leads to overlow exhaust temperature; compressor liquid hammer is prevented when the return gas temperature is overlow; and due to the introduction of a defrosting compensation phase, the highest defrosting effect of the hot gas bypass is ensured.

The invention provides a method for defrosting an air conditioning system. The air conditioning system comprises an indoor heat exchanger, throttle devices, an outdoor heat exchanger, a four-way valve, a compressor, a bypass circuit branch and a junction main circuit which are arranged on refrigerant circulation paths in a heating mode, wherein the compressor is connected with the indoor heat exchanger and the outdoor heat exchanger through the four-way valve; a heat accumulator is arranged on and connected with the compressor; the bypass circuit branch is connected between the four-way valve and the outdoor heat exchanger; and the junction main circuit is connected between the throttle devices and connected with the compressor by the heat accumulator. During defrosting, a refrigerant flows out of the compressor and passes through the four-way valve for bypassing, a part of the refrigerant enters the outdoor heat exchanger for defrosting through the bypass circuit branch, the other part of the refrigerant enters the indoor heat exchanger for heating, after heat exchange, the two parts of the refrigerant are subject to throttling, flow into the junction main circuit, enter the heat accumulator for heating, and then return to the compressor, so that the circulation is completed. The two parallel refrigerant circulation paths are formed in a defrosting state, so that the defrosting and continuous heating can be ensured at the same time.

The invention provides a defrosting control method and system and an air conditioner. The defrosting control method comprises the following steps that a system parameter is detected by the air conditioner under a heating mode; if the system parameter reaches the preset defrosting condition, a stop valve is controlled to close, and an electric heating piece works; and the heat accumulator temperatures of the time when the electric the heating piece stars working and during first preset duration are respectively recorded to be T0 and Ti, if the temperature difference of the heat accumulator is not larger than the preset temperature difference, the electric heating piece is controlled to stop working, the stop valve is started, a four-way valve is reversed to enable the air conditioner to defrost under a refrigerating mode, or else, defrosting is finished. According to the defrosting method provided by the invention, the air conditioner defrosts under the refrigerating mode, the good defrosting effect and good heating effect are ensured, and using comfort of a user is promoted; and when the temperature of the heat accumulator slowly rises, and heat of a heat storage assembly cannot meet the defrosting requirements of the air conditioner under the heating mode, the four-way valve is reversed to enable the air conditioner to defrost under the refrigerating mode, normal defrosting of the air conditioner is ensured, and the using satisfaction degree of the user is improved.

The invention provides an air conditioner defrosting control method and device, and an air conditioner. The air conditioner defrosting control method includes the steps that the outer pipe temperatureof the air conditioner is continuously acquired at a preset time interval; an acquired outer pipe temperature data set is compared with a preset temperature, when the acquired plurality of outer pipetemperature data meet the preset condition, the air conditioner is controlled to perform defrosting, and it is avoided that the phenomenon of frequent defrosting or defrosting without frost occurs, and heating comfort of the air conditioner is affected. By acquiring the outer pipe temperature data set, meanwhile the observation period on the air conditioner is prolonged, when the acquired plurality of outer pipe temperature data meet the preset condition, the air conditioner is controlled to perform defrosting, it is avoided that the phenomenon of frequent defrosting or defrosting without frost occurs, and heating comfort of the air conditioner is affected, and the precision of defrosting of the air conditioner without an outdoor environment temperature sensing device is improved.

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 a defrosting control method for a refrigerator and the refrigerator. The method comprises the following steps of detecting environment temperature, compartment temperature and refrigeration starting time; acquiring a defrosting period and defrosting exiting temperature according to the environment temperature, the compartment temperature and the refrigeration starting time; when the energizing time of the refrigerator reaches the defrosting period, controlling the refrigerator to enter a defrosting mode for defrosting, and exiting the defrosting mode until the temperature reaches the defrosting exiting temperature. According to the defrosting control method for the refrigerator, provided by the embodiment of the invention, the defrosting period and the defrosting exiting temperature can be intelligently adjusted, the defrosting effect can be guaranteed, the aim of saving energy can be achieved, and the market competitiveness of the refrigerator is improved.

The invention discloses an air conditioner system and a defrosting control method and device thereof. The defrosting control method comprises the following steps that when the air conditioner system is defrosted each time, the defrosting exiting time determined in the previous time of defrosting is obtained; the air conditioner system is controlled to be defrosted according to the defrosting exiting time determined in the previous time of defrosting; in the defrosting process of the air conditioner system, the temperature of the outdoor environment is obtained, and the temperature of an outletof an outdoor heat exchanger is obtained; the temperature of the outdoor environment and the temperature of the outlet of the outdoor heat exchanger are judged; and if the temperature of the outlet of the outdoor heat exchanger is smaller than the first preset temperature for the preset time and the temperature of the outdoor environment is smaller than the second preset temperature, the forced defrosting time is obtained to serve as the defrosting exiting time of the next time of defrosting of the air conditioner system and stored. Accordingly, the defrosting exiting time can be adjusted according to the temperature of the outdoor environment, the temperature of the outlet of the heat exchanger and the lasting time of the temperature of the outdoor environment and the temperature of theoutlet of the heat exchanger, and the defrosting effect is guaranteed while the heat exchange effect is guaranteed.

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 embodiment of the invention provides a refrigerator defrosting control method and device and a refrigerator, and relates to the technical field of refrigeration. By adopting the simple refrigerator defrosting control mode, the defrosting effect is guaranteed, and meanwhile, the refrigerator has an obvious energy-saving effect. The method comprises the steps of starting timing after defrosting operation is started once in the refrigerator in the refrigeration operation process of the refrigerator; judging the accumulated number of times of starting defrosting operation of a second mode after the refrigerator starts the defrosting operation of a first mode after the time is counted to a preset duration, wherein according to the defrosting operation of the first mode, defrosting is carried out at fixed power until the temperature of an evaporator reaches a preset temperature, and according to the defrosting operation of the second mode, defrosting is carried out at fixed power within a preset defrosting operation duration; and when the accumulated number of times of starting the defrosting operation of the second mode is greater than or equal to M, starting the defrosting operation of the first mode, and when the temperature of the evaporator of the refrigerator reaches the preset temperature, exiting the defrosting operation of the first mode. The defrosting control method and device are used for defrosting of the refrigerator.

The invention discloses a defrosting control method and system for a heat pump system. The method comprises the following steps that S1, the environment temperature T-environment temperature of the heat pump system and the heat exchanger coil temperature T-heat exchange of the heat pump system are obtained in real time, the heat exchange efficiency delta T-heat exchange efficiency is calculated, and whether a defrosting mode is started or not is determined according to the comparison result of the delta T-heat exchange efficiency and a defrosting threshold value; S2, the system heating time when the system is larger than or equal to the defrosting threshold value D01 is obtained, and after the defrosting mode is started, the time is compared with the minimum heating duration; and S3, according to the comparison result obtained in the step 2, the defrosting threshold value is further adjusted according to the comparison result of the period and the comparison result of the last period so that the defrosting self-adaptive control of the heat pump system can be realized. According to the defrosting control method and system, the defrosting time and the heating duration are judged comprehensively, so that the heating duration is adjusted, and then the defrosting effect is guaranteed.

A defrosting method for an air conditioning unit comprises steps as follows: various influence factors affecting defrosting operations of an outdoor unit are detected, and defrosting judgment is performed at least once according to the various influence factors as follows: judgment is performed according to the magnitude relation of the frosting degree of the outdoor unit and a preset degree threshold value, and / or judgment is performed according to the magnitude relation of the defrosting interval between the current time and the previous defrosting time of the outdoor unit and a preset interval threshold value; according to judgment results, whether the outdoor unit performs the defrosting operations is determined. According to the method and the device, defrosting judgment is performed by the aid of the frosting degree and the defrosting interval, the device is suitable for various regions with different environments, and the defrosting effect is guaranteed; and in addition, on the basis that the defrosting effect is guaranteed, defrosting times can be effectively reduced, and the advantage of energy saving can be realized.

The invention discloses a ternary-cycle air cooled refrigerator. An electrical control device internally stores parameters such as a refrigerating fan operating target time parameter LCFSJ. The defrosting method comprises a freezing chamber defrosting method, a refrigerating chamber defrosting method and a variable temperature chamber defrosting method. The freezing chamber defrosting method comprises a defrosting entering preparing step, a defrosting preparing step, a defrosting entering step, a defrosting step and a defrosting existing step. According to the ternary-cycle air-cooled refrigerator and the defrosting method thereof, considering specific working conditions in the operation process of the refrigerator, accurate matching of the defrosting control and the actual working conditions is realized, the defrosting effect is ensured, the condition that defrosting is carried out when defrosting is not needed is avoided, frequent defrosting is avoided, excessive starting of a defrosting electrical heater is avoided, so that energy is saved, and a phenomenon that defrosting cannot exit is prevented.

The invention relates to a four-way valve defrosting backing up method of air conditioner without shutting down, an operation method executed when the existing main control program of air conditioner enters defrosting stage, including the following stages: 1) whether the main control program enters the defrosting stage is judged, if no, the main control program is returned and is executed continuously, if yes, the next stage is carried out; 2) defrosting mode is determined and the defrosting stage is carried out; 3) defrosting is finished to return to the main control program. The defrosting mode includes a four-way valve defrosting mode and a compound defrosting mode. In the invention, when the main control program is executed to the defrosting stage, firstly whether an induction heater is normal and whether outdoor temperature is high are judged, and different defrosting modes are adopted according to the judging result. The defrosting mode is avoided to be operated without shutting down under abnormal condition. Thus, the service life of the air conditioner is ensured, defrosting effect under the condition that the air conditioner is not shut down is also ensured, and the service efficiency of the air conditioner is improved.

The invention belongs to the technical field of air conditioners, and specifically provides an air conditioning unit with defrosting branches, and aims to solve the problem that a defrosting way of anexisting air conditioning unit is not good. The air conditioning unit comprises a main circulating loop as well as an indoor coiled tube, a four-way valve, a compressor and a first outdoor coiled tube and a second outdoor coiled tube, which are arranged on the main circulating loop, wherein the first outdoor coiled tube and the second outdoor coiled tube are arranged in parallel; the first end ofthe first defrosting branch is connected to the second end of the second outdoor coiled tube; the second end of the first defrosting branch is connected between the four-way valve and the compressor,so that a high-temperature refrigerant in the compressor can directly enter the first outdoor coiled tube through the first defrosting branch; the first end of the second defrosting branch is connected to the second end of the second outdoor coiled tube, and the second end of the second defrosting branch is connected between the four-way valve and the compressor, so that the high-temperature refrigerant in the compressor directly enters the second outdoor coiled tube through the second defrosting branch. The air conditioning unit can realize alternated defrosting through multiple groups of outdoor units.

The invention relates to the technical field of air conditioning, in particular to an outdoor unit condenser, an outdoor unit and an inverter air conditioner. The invention aims at solving the problemthat an existing air conditioner is low in heating efficiency. To achieve the purpose, the outdoor unit condenser comprises a heat exchange pipe section, a supercooling pipe section, a throttling element, supercooling connecting pipes and a plurality of supercooling valves, wherein the first end of the supercooling pipe section can be connected with an indoor unit evaporator through a main capillary pipe; the position between the first end and the second end of the supercooling pipe section is divided into n supercooling intervals through the supercooling valves; the plurality of supercoolingintervals are connected with the first end of the throttling element through the supercooling connecting pipes respectively; the second end of the throttling element is connected with the heat exchange pipe section; and the effective length of the supercooling pipe section can be adjusted by controlling opening and closing of each supercooling valve. By means of the arrangement mode, the heatingenergy efficiency can be improved, and frosting is restrained.

The invention relates to a refrigerator and a control method thereof. A first temperature sensor and / or a second temperature sensor are / is close to a container opening, and can detect the temperaturechange when food is put into a refrigeration compartment in time, through the temperature change detected by the first temperature sensor or the second temperature sensor, the refrigerator is controlled to be in the refrigeration state or reinforced refrigeration state, through the temperature difference relation of the first temperature sensor and the second temperature sensor, the refrigerator is controlled to be in the first reinforced refrigeration state or the second reinforced refrigeration state, according to the actual condition, the refrigeration compartment is subjected to adaptive cooling, the influence of newly-put food on the temperature of the refrigeration compartment can be offset, and according to the temperature difference relation between the first temperature sensor andthe second temperature sensor, the refrigeration compartment is controlled to retreat from the reinforced refrigeration state, therefore, timeliness and precision of detection of the temperature change of the refrigeration compartment can be greatly improved, the refrigeration effect of the refrigeration compartment can be ensured, in addition, a first defrosting process after the reinforced refrigeration state is adjusted, and the defrosting effect is ensured.

The invention belongs to the technical field of heat exchange control and discloses a heat source tower control method. The heat source tower control method comprises the steps of determining the windpressure set value of a heat source tower heat exchange device, or the suction temperature set value of a compressor or the temperature set value of a heat conduction medium flowing into a heat source tower side heat source heat exchange device according to the real-time temperature of the external temperature; and starting the defrosting program when the wind pressure of the heat source tower isless than the wind pressure set value, or the suction temperature of the compressor is less than the suction temperature set value or the temperature of the heat conduction medium flowing into the heat source tower side heat source heat exchange device is less than the temperature set value of the heat conduction medium. Through the heat source tower control method, the parameter set values related to frosting are determined according to the real-time temperature of the external environment; whether the defrosting program is started or not is judged by comparing the relation of the frosting related parameter real-time detection value and the set value, and the frosting degree can be judged accurately. The invention further discloses a heat source tower control device and a heat source tower.

The invention discloses a defrosting control method for a refrigerating unit and the refrigerating unit. The defrosting control method comprises the steps that the return air temperature, the air supply temperature, the low-pressure pressure and the air inlet and outlet pressure difference of the refrigerating unit are detected, when the temperature difference between the return air temperature and the air supply temperature meets the condition that the temperature difference between the return air temperature and the air supply temperature is larger than a first preset temperature differencevalue delta T<1> and less than or equal to a second preset temperature difference value delta T<2>, whether the low-pressure pressure is less than or equal to a low-pressure pressure preset value P<1>or not is judged, when the low-pressure pressure is less than or equal to the low-pressure pressure preset value P<1>, whether the air inlet and outlet pressure difference is larger than a first preset pressure difference value delta P<1> or not is judged, and if yes, defrosting is started; and if it is detected that the air inlet and outlet pressure difference is less than a second preset pressure difference value delta P<2>, defrosting is finished. According to the defrosting control method, compared with the prior art, the defrosting misjudgment probability is reduced, the defrosting precision is greatly improved, invalid defrosting is reduced, energy can be saved, the defrosting effect is guaranteed, and then the problem that the refrigerating temperature fluctuates too much is solved.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method for a fixed-frequency air conditioner. In order to improve the defrosting efficiency of the fixed-frequency air conditioner, the defrosting control method for the fixed-frequency air conditioner comprises the following steps: under the condition that the fixed-frequency air conditioner is in a heating working condition, the inner coil temperature and the indoor temperature are detected every the preset time; and according to the attenuation speed of the inner coil temperature and the attenuation speed of the indoor temperature, whether the fixed-frequency air conditioner enters into the defrosting mode or not is judged. The outdoor unit frosting degree is represented innovatively through the change trend of the inner coil temperature and the change trend of the indoor temperature, thus the timing of the air conditioner entering into the defrosting mode is judged, the fixed-frequency air conditioner is prevented from frequently entering into defrosting, the defrosting effect is guaranteed, and the user experience is improved.

The invention belongs to the technical field of air conditioners and provides a defrosting control method of an air conditioner and the air conditioner in order to solve the problem that an existing air conditioner cannot select the optimal defrosting mode by judging conditions. The defrosting control method comprises the following steps that whether the photovoltaic voltage is larger than or equal to a first preset voltage or not is judged; if the photovoltaic voltage is larger than or equal to the first preset voltage, the air conditioner is made to enter in a first defrosting mode; if the photovoltaic voltage is smaller than the first preset voltage, whether the battery voltage is larger than or equal to a second preset voltage or not is judged; if the battery voltage is larger than or equal to the second preset voltage, the air conditioner is made to enter in a second defrosting mode; and if the battery voltage is smaller than the second preset voltage, the air conditioner is made to enter in a third defrosting mode. By judging the conditions of the photovoltaic voltage and the battery voltage, the air conditioner is made to adopt the optimal defrosting mode, thus the defrosting effect of the air conditioner is guaranteed, the heating effect of the air conditioner at the time of defrosting is improved, and accordingly the comfort degree of the indoor environment is improved.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method for a fixed-frequency air conditioner. In order to improve the defrosting efficiency of the fixed-frequency air conditioner, the defrosting control method for the fixed-frequency air conditioner comprises the following steps that firstly, the indoor temperature Tindoor is detected in real time under the condition that the fixed-frequency air conditioner is in the heating working condition, and the temperature of an inner coil pipe is detected every preset time; secondly, the difference delta T between the preset temperature Tset and the Tindoor is equal to Tset minus Tindoor is calculated; and thirdly, whether the fixed frequency air conditioner enters a defrosting modeor not is judged according to the difference delta T and the attenuation speed of the temperature of the inner coil pipe. According to the defrosting control method, the change trend of the temperature of the inner coil pipe is innovatively utilized, and the frosting degree of an outer unit is characterized in combination with the change of the indoor temperature, so that the timing of entering the defrosting mode of the air conditioner is judged, the defrosting effect of the fixed frequency air conditioner is avoided, the defrosting effect is guaranteed, and the user experience is improved.

The invention provides a defrosting frequency control method and an air conditioning system, and belongs to the technical field of air conditioners. The method comprises the following steps that a defrosting mode is started, the compressor operation frequency F0 in the heating attenuation period is determined, and initial correction of the compressor operation frequency correction F in the initial defrosting stage is determined; the operation frequency F initial stage of the defrosting initial stage compressor is corrected and determined according to F0 and F initial stage; determining the medium-term correction of the operation frequency correction quantity F of the compressor in the medium-term defrosting; the operation frequency F middle stage of the defrosting middle stage compressor is corrected and determined according to the F initial stage and the F middle stage; determining the last-stage correction of the compressor operation frequency correction F in the last stage of defrosting; and according to the F0 and Flast phase correction, the running frequency Flast phase of the compressor at the defrosting last phase is determined. According to the method, the operation frequency of the compressor in the defrosting mode can be adjusted in stages, so that on the premise that the defrosting effect is guaranteed, the indoor high comfort is kept, and the good use experience is provided for a user.

The invention relates to the technical field of heat pump defrosting, and particularly relates to a defrosting method for a heat pump unit. The defrosting method comprises the steps that the first valve opening degree during initial defrosting is obtained according to the current evaporation temperature and the current environment temperature of the heat pump unit; the current operation second pressure and the current evaporation temperature of the heat pump unit are continuously monitored in real time, the corresponding first pressure is obtained according to the current evaporation temperature, and a valve opening degree adjusting value is obtained according to the first pressure, the second pressure, a logically-set proportionality coefficient, an integral time coefficient and a differential time coefficient; and after the first valve opening degree is continuously adjusted according to the valve opening degree adjusting value, defrosting is completed. According to the defrosting method for the heat pump unit, defrosting is complete, and potential safety hazards during defrosting are eliminated.

The invention relates to a refrigerator adopting a single stirling cryocooler as a cold source. The refrigerator comprises three temperature zones, namely the freezing zone, the variable temperature zone and the refrigerating zone, wherein the three temperature zones are independent of one another and are sequentially arranged from top to bottom. A cold finger of the stirling cryocooler is separated into two parts, namely a low-temperature cavity and a high-temperature cavity, by a thermally-insulating layer. The thermally-insulating layer is perpendicular to the central axis of the cold finger. The low-temperature cavity communicates with the freezing zone and supplies cold. An air outlet channel of the high-temperature cavity is separated into a first air outlet channel body and a secondair outlet channel body through a split-flow valve. The first air outlet channel body communicates with the variable temperature zone. The second air outlet channel body communicates with the refrigerating zone. The first air outlet channel body is provided with an air door used for controlling the air supply amount input into the variable temperature zone. In this way, the cold finger of the stirling cryocooler can supply cold to the three temperature zones independently at the same time; in addition, by means of the split-flow valve and the air door, the cold capacity can be distributed conveniently and rapidly; and furthermore, temperature control over the variable temperature zone and the refrigerating zone is achieved.

The invention provides an air conditioner defrosting control method, a control device and an air conditioner. The control method comprises the steps of after the relative air humidity RH and the outdoor unit coil temperature T meet the first preset conditions, enabling the air conditioner to enter a defrosting mode; enabling a compressor to defrost at high frequency, and converting the compressorto defrost at low frequency after the outdoor unit coil temperature T meets the second preset condition; and when the outdoor unit coil temperature T meets the third preset condition, exiting the defrosting mode. By reasonably controlling the frequency of the compressor, not only can the defrosting speed be accelerated, but also a defrosting effect can be guaranteed.

The invention discloses a defrosting heating pipe component comprising mounting bases, heating mechanisms, heat radiation nets, a fan, an air pipe and jet heads, wherein each heating mechanism comprises insulating parts, insulating heat-conducting particles, heating wires and a metal pipe; a row of heating mechanisms are arranged in parallel, and the two ends of each heating mechanism are fixed tothe two mounting bases; each heating mechanism is internally provided with a plurality of insulating parts, and the two ends of each heating mechanism are encapsulated through the insulating parts; the middle part of each metal pipe is provided with the heating wires, and the interior of each metal pipe is filled with the insulating heat-conducting particles; the heating wires are divided into linear sections and spiral sections, and the linear sections penetrate through holes in the middle parts of the insulating parts; the heat radiation nets are arranged between every two adjacent heatingmechanisms; and the fan is arranged below the heating mechanism, and connected to the air pipe of which the upper surface is provided with a plurality of jet heads. The defrosting heating pipe component has the advantages of high heating efficiency, large heat exchange area, and good defrosting effect, and accidents are avoided; and lots of water generated in the defrosting process can be discharged in time.

The invention relates to a control device, an air-conditioning heat pump system and a control method of the air-conditioning heat pump system. The air-conditioning heat pump system comprises a compressor, a gas-liquid separator, an intermediate heat exchanger, an outdoor heat exchanger and an indoor heat exchanger which are connected through a refrigerant pipeline; the immediate heat exchanger comprises a first heat exchange pipeline and a second heat exchange pipeline; a first electronic expansion valve is arranged on a main path of the refrigerant pipeline; the indoor heat exchanger is provided with a second electronic expansion valve; the outdoor heat exchanger comprises a first portion and a second portion arranged on a bypass branch; the first side of the bypass branch is connected between the first end of the first heat exchange pipeline and the second electronic expansion valve; the second side of the bypass branch is connected to the first end of the second heat exchange pipeline; the second end of the second heat exchange pipeline is connected to an enthalpy increasing port of the compressor and / or the gas-liquid separator; and a valve and a third electronic expansion valve are arranged on the bypass branch. Therefore, it is possible to improve the overall performance of the air-conditioning heat pump system.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method for a constant-frequency air conditioner. In order to improve the defrosting efficiency of the constant-frequency air conditioner, the defrosting control method for the constant-frequency air conditioner comprises the following steps that under the situation that the constant-frequency air conditioner is in the heating working condition, the indoor temperature is detected every preset time; and whether the constant-frequency air conditioner enters into a defrosting mode ornot is judged according to the decreasing speed of the indoor temperature. The change trend of the indoor temperature is innovatively utilized to represent the frosting degree of an external unit, therefore, the time when the air conditioner enters into the defrosting mode is judged, the constant-frequency air conditioner is prevented from frequently entering into the defrosting mode, the defrosting effect is ensured, and the user experience is improved.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method for a fixed-frequency air conditioner. In order to improve the defrosting efficiency of the fixed-frequency air conditioner, the defrosting control method for the fixed-frequency air conditioner comprises the following steps: under the condition that the fixed-frequency air conditioner is in a heating working condition, the inner coil temperature is detected every the preset time; and according to the attenuation speed of the inner coil temperature, whether the fixed-frequency air conditioner enters into the defrosting mode or not is judged. The outdoor unit frosting degree is represented innovatively through the change trend of the inner coil temperature, thus the timing of the air conditioner entering into the defrosting mode is judged, the fixed-frequency air conditioner is prevented from frequently entering into defrosting, the defrosting effect is guaranteed, and the user experience is improved.