37results about How to "Quick defrost operation" patented technology

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. In order to improve defrosting efficiency of the air conditioner, the defrosting control method of the air conditioner is provided for the air conditioner with a bypass defrosting loop, and the method comprises following steps: when the air conditioner enters a defrosting mode for n times, indoor temperature Troom and outer coil pipe temperature Toil of the air conditioner are acquired; the air conditioner is enabled to enter a bypass defrosting modeor a reverse circulating defrosting mode selectively according to Troom and Toil, and n is an integer larger than or equal to 2. The air conditioner is enabled to enter the bypass defrosting mode or the reverse circulating defrosting mode through selection of the indoor temperature and the outer coil pipe temperature, so that use experience of a user is guaranteed, besides, an outdoor fan can be controlled at intervals to rotate reversely, a frost layer is rapidly blown off under the reverse blowing action of the outdoor fan, and the defrosting efficiency is improved.

The invention belongs to the technical field of air conditioners and particularly relates to an air conditioner defrosting control method. The air conditioner defrosting control method aims at improving the defrosting efficiency of air conditioners and is proposed for air conditioners with bypass defrosting loops. The method comprises the following steps that when an air conditioner enters a bypass defrosting mode, the defrosting running time t and the exhaust temperature T are obtained; when t is larger than or equal to first preset time and T is smaller than or equal to a preset temperature,whether the condition for quitting defrosting is met or not is judged; and if not, the air conditioner is switched into a reverse circulation defrosting mode. According to the air conditioner defrosting control method, in the bypass defrosting mode, the defrosting efficiency of the air conditioner can be judged according to the defrosting running time and the exhaust temperature of the air conditioner, and the air conditioner is switched into reverse circulation defrosting once the defrosting efficiency becomes poor and a frost layer is not thoroughly removed yet so as to improve the defrosting efficiency of the air conditioner; and besides, an indoor draught fan can be intermittently controlled to rotate reversely, and the reverse blowing function of the outdoor draught fan is used for blowing off the frost layer quickly to improve the defrosting efficiency.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. In order to improve the defrosting efficiency of the air conditioner, the defrosting control method of the air conditioner aims at the air conditioner with a bypass defrosting loop. The method comprises the following steps that when the air conditioner enters the defrosting mode for the nth time, the heating running time tn of the air conditioner is acquired; if tn>tn-1, the air conditioner is made to enter the reverse cycle defrosting mode, and otherwise the air conditioner is made to enter the bypass defrosting mode; and n is a positive integer larger than or equal to 2, tn is the heating running time of the air conditioner in the current period, and tn-1 is the heating running time of the air conditioner in the last period. The optimal defrosting mode can be accurately selected, an outdoor fan can be controlled to rotate reversely intermittently, a frost layer is rapidly blown down through the reverse blowing function of the outdoor fan, and therefore defrosting efficiency is improved.

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of an air conditioner, the method comprises the following step that after the air conditioner enters a defrosting mode, an outdoor fan is controlled to continuously reverse. According to the technical scheme, due to the reverse blowing effect of the outdoor fan, a frost layer in the defrosting process of an outdoor unit is easier and faster to blow off, so that the defrosting efficiency is improved. Compared with a traditional defrosting mode that the situation that the frost layer needs to be gradually separated from the outdoor unit or all melts into water is needed, the defrosting operation can be completed more quickly, and the influence of the defrosting process on the indoor temperature is effectively reduced.

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner defrosting control method. In order to improve defrosting efficiency of an air conditioner, the air conditioner defrosting control method is proposed aiming at an air conditioner with a bypass defrosting circuit, and the bypass defrosting circuit is arranged between a compressor of theair conditioner and an outdoor unit, and is used for introducing high-pressure gas discharged by the compressor into the outdoor unit to melt frost layers on an outdoor unit coil. The method comprisesthe following steps that when the air conditioner needs to enter a defrosting mode, an outdoor fan is controlled to stop rotating, and the bypass defrosting circuit is turned on; and after the outdoor fan stops rotating for more than a set time, in the technical scheme of the invention, the outdoor fan is controlled to continuously rotate in a reversed mode. Due to the fact that part of frost onan outdoor coil melts within the set time, the outdoor fan is controlled to rotate in the reversed mode at this time, and the frost layers of the outdoor unit in the defrosting process are blown off more easily and quickly through the reverse blowing effect of the outdoor fan so as to improve the defrosting efficiency.

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner defrosting control method. For improving defrosting efficiency of the air conditioner with a bypass defrosting loop, the air conditioner defrosting control method includes the following steps: when the air conditioner needs to entre a defrosting mode, acquiring temperature Toil of an outer coil of the air conditioner; selectively enabling the air conditioner to enter a bypass defrosting mode or a reverse cycle defrosting mode according to the temperature Toil; when the air conditioner enters the bypass defrosting mode, intermittently controlling the bypass defrosting loop to open / close, and controlling an outdoor draught fan to reverse for set time under the closing state of thebypass defrosting loop; and confirming opening time of the bypass defrosting loop and the set time according to the following mode: acquiring indoor environment temperature Troom; and confirming theopening time of the bypass defrosting loop and the set time according to the temperature Troom. The air conditioner defrosting control method can accurately select the optimum defrosting mode and efficiently blow off molten frost layers, and greatly improves defrosting efficiency of the air conditioner.

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method, for an air conditioner with double fans arranged on an outdoor unit, comprises the following steps that after the air conditioner enters a defrosting mode, the upper fan and the lower fan are controlled to stop rotating; after a first set time, the temperature Ta at the upper part of an outer coil, the temperature Tb at the middle part of the outer coil and the temperature Tc at the lower part of the outer coil are detected correspondingly; and the upper fan and the lower fan are selectively controlled to reversely rotate / stop rotating according to at least one of Ta, Tb and Tc. The upper fan and / or the lower fan are / is selectively controlled to rotate reversely according to at least one of Ta, Tb and Tc, so that a frost layer is accurately blown off and the defrosting efficiency of the air conditioner is greatly improved.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. The defrosting control method of the air conditioner isapplied to the air conditioner with double fans arranged on an outdoor unit so as to improve the defrosting efficiency of the air conditioner. The method includes the following steps that after the air conditioner enables the defrosting mode, an upper fan and a lower fan are controlled to stop rotation; after the first set time, only the upper fan is controlled to rotate reversely for the secondset time; after the first set time, the lower fan is controlled to rotate reversely for the second set time, and the upper fan is controlled to rotate reversely for the third set time; and after the second set time, only the lower fan is controlled to rotate reversely for the second set time. According to the method, the fans in the corresponding positions are controlled in a matched manner to rotate reversely according to the thawing sequence of frost, so that frost layers are blown off accurately, and the defrosting efficiency of the air conditioner is greatly improved.

The invention belongs to the technical field of air conditioners and particularly relates to an air conditioner defrosting control method. The air conditioner defrosting control method aims to improvethe defrosting efficiency of the air conditioner. The air conditioner defrosting control method is directed against an air conditioner with a bypass defrosting loop. The air conditioner defrosting control method comprises the following steps that when the air conditioner needs to enter the defrosting mode, an outdoor fan is controlled to stop rotation, and the bypass defrosting loop is started; after the outdoor fan stops rotation for a first set time period, the outdoor fan is controlled to rotate reversely for a second set time period; after the outdoor fan rotates reversely for the secondset time period, the temperature t<upper> of the upper part of an outer coiler, the temperature t<middle> of the middle of the outer coiler and the temperature t<lower> of the lower part of the outercoiler are detected; and according to at least one of the temperature t<upper>, the temperature t<middle> and the temperature t<lower>, the outdoor fan is controlled to rotate reversely for the secondset time period again. By the adoption of the air conditioner defrosting control method, the reverse rotation moment of the outdoor unit can be more accurately controlled, the number of times of reverse blowing of the outdoor fan is reduced, and the outdoor fan can more accurately and more efficiently blow off a molten frost layer.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed by the present invention is aimed at an air conditioner with dual fans installed on the outdoor unit. The method includes: after the air conditioner enters the defrosting mode, control the upper fan and the lower fan to stop rotating; After the first set time, if 1.1Ie≤I 下 ≤1.2Ie, and Ie<I 上 <1.1Ie, only the upper fan is controlled to reverse for the second set time; after the first set time, if I 上 <I 下 <1.1Ie, and I 上 >Ie, then control the second set time of reverse rotation of the lower fan, and control the third set time of reverse rotation of the upper fan; after the first set time, if I 上 <I 下 <1.1Ie, and I 上 =Ie, then only the down fan is controlled to reverse for the second set time. The present invention according to I 上 and I 下 Selectively control the reversal of the upper fan and / or the lower fan, so as to accurately blow off the frost layer and greatly improve the defrosting efficiency of the air conditioner.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed in the present invention is aimed at an air conditioner with dual fans installed on the outdoor unit. The method includes: detecting the current I of the upper fan 上 and the current I of the lower fan 下 ; when I 上 / / Ie≥the first preset value and I 下 / When / Ie≥the first preset value, the air conditioner enters the defrosting mode; after the air conditioner enters the defrosting mode, the upper fan and the lower fan are controlled to stop rotating; after the first set time, only the upper fan is controlled to reverse for the second time 2. Set the time; after the first set time, control the reverse of the lower fan for the second set time, and control the reverse of the upper fan for the third set time; after the second set time, only control the lower fan Reverse the second set time. The present invention matches and controls the reverse rotation of the fan at the corresponding position according to the melting sequence of the frost, thereby accurately blowing off the frost layer and greatly improving the defrosting efficiency of the air conditioner.

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner defrosting control method. In order to improve the air conditioner defrosting efficiency, the method is provided and comprises the following steps that after an air conditioner is in the defrosting mode, an outdoor fan is controlled to stop rotating; and after the rotating stopping timeof the outdoor fan is longer than the set time, the outdoor fan is controlled to continuously rotate reversely. According to the technical scheme, part of frost on an outdoor coiled pipe is melted within the set time period, at the moment, the outdoor fan is controlled to continuously rotate reversely, a frost layer in an outdoor unit in the frost melting process is blown off more easily and quickly through the reverse blowing effect of the outdoor fan, and accordingly, the defrosting efficiency is improved. Compared with a traditional defrosting mode, namely, the condition that the frost layer needs to wait to be gradually separated from the outdoor unit or is completely melted into water, through the air conditioner defrosting control method, defrosting operation can be completely morequickly, and the influence on the indoor temperature in the defrosting process is effectively reduced.

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner defrosting control method. In order to improve the defrosting effect of an air conditioner, the air conditioner defrosting control method aims at the air conditioner with a bypass defrosting circuit. The method includes the following steps of controlling an outdoor fan to stop rotatingand opening the bypass defrosting circuit when the air conditioner needs to enter a defrosting mode, controlling the outdoor fan to rotate backwards for second set time after the outdoor fan stops rotating for first set time, selectively controlling the outdoor fan to rotate backwards again for second set time according to the currents of the outdoor fan after the outdoor fan rotates backwards forsecond set time, closing the bypass defrosting circuit when the outdoor fan rotates backwards, and opening the bypass defrosting circuit preset time later after the outdoor fan rotates backwards forsecond set time. The backwards-rotating moment of the outdoor fan can be more precisely controlled, the back flushing frequency of the outdoor fan is reduced, and the defrosting efficiency of the airconditioner is greatly improved.

The invention belongs to the technical field of air conditioners, and in particular relates to a defrosting control method for an air conditioner. In order to improve the defrosting efficiency of the air conditioner, the defrosting control method for the air conditioner proposed by the present invention is aimed at the air conditioner with dual fans on the outdoor unit. The method includes the following steps: after the air conditioner enters the defrosting mode, control the upper fan and all The lower fan stops rotating; after the first set time, only the upper fan is controlled to reverse for the second set time; after the first set time, the lower fan is controlled to reverse for the second set time, and controlling the upper fan to reverse for a third set time; and after the second set time passes, only control the down fan to reverse for the second set time. The invention controls the reverse rotation of the fans at the corresponding positions in a matched manner according to the melting sequence of the frost, thereby accurately blowing off the frost layer and greatly improving the defrosting efficiency of the air conditioner.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed in the present invention is aimed at the air conditioner with a bypass defrosting circuit. The method includes the following steps: when the air conditioner enters the defrosting mode for the nth time, obtain the The heating operation time of the device is t n ; if t n >t n‑1 , then the air conditioner enters the reverse cycle defrosting mode, otherwise the air conditioner enters the bypass defrosting mode; wherein, n is a positive integer greater than or equal to 2, t n is the heating operation time of the air conditioner in the current cycle, t n‑1 It is the heating operation time of the air conditioner in the last cycle. The present invention can not only accurately select the best defrosting mode, but also control the reverse rotation of the outdoor fan at intervals, and use the back-blowing effect of the outdoor fan to quickly blow off the frost layer, so as to improve the defrosting efficiency.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. In order to improve the defrosting efficiency of the air conditioner, the provided defrosting control method of the air conditioner is proposed for the air conditioner with a bypass defrosting circuit, the method includes the following steps that when theair conditioner enters into a defrosting mode for the n time, heating operation time t<n> of the air conditioner is obtained; if the t<n> is greater than first set time, the air conditioner enters into a reverse cycle defrosting mode, and otherwise, the air conditioner enters into a bypass defrosting mode; and if the air conditioner enters into the reverse cycle defrosting mode when the air conditioner enters into the defrosting mode for the n time, the air conditioner enters the bypass defrosting mode when the air conditioner enters into the defrosting mode for the (n+1) time andthe (n+2) time, wherein n is equal to 3m+1, and m is an integer greater than or equal to 0. According to the defrosting control method, the best defrosting mode can be accurately selected, an outdoor fan can further be controlled to reverse at intervals, and a frost layer is blown down rapidly by using the blowback effect of the outdoor fan to improve the defrosting efficiency.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed by the present invention is aimed at the air conditioner with a bypass defrosting circuit, and the method includes the following steps: when the air conditioner needs to enter the defrosting mode, control the outdoor fan Stop rotating and open the bypass defrosting circuit; after the outdoor fan stops rotating for the first set time, control the outdoor fan to reverse for the second set time and close the bypass defrosting circuit; when the outdoor fan reverses for the second After the set time, the bypass defrosting circuit is turned on after a time t; wherein, the time t is determined according to the indoor temperature. The present invention controls the bypass defrosting circuit to close accordingly when the outdoor fan is controlled to reverse at intervals, and then opens the bypass defrosting circuit after the reversal end time t, so that the reverse of the outdoor fan and the bypass circuit The opening states are staggered to avoid the impact of outdoor fan reversal on bypass defrosting.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed in the present invention is aimed at the air conditioner with a bypass defrosting circuit, and the method includes the following steps: when the air conditioner needs to enter the defrosting mode, control the outdoor fan Stop rotating and open the bypass defrosting circuit; after the outdoor fan stops rotating for the first set time, control the outdoor fan to reverse for the second set time; when the outdoor fan reverses for the second set time, according to the outdoor fan The current selectively controls the outdoor fan to reverse for the second set time; when the outdoor fan is reversed, the bypass defrosting circuit is closed, and after the outdoor fan is reversed for the second set time, the time t is passed to open the Bypass the defrosting circuit, where the time t is determined according to the room temperature. The invention can more precisely control the reverse timing of the outdoor fan, and greatly improves the defrosting efficiency of the air conditioner.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed in the present invention is aimed at an air conditioner with a bypass defrosting circuit. The method includes the following steps: when the air conditioner needs to enter the defrosting mode, obtain the External coil temperature Toil; selectively make the air conditioner enter bypass defrosting mode or reverse cycle defrosting mode according to Toil; when the air conditioner enters bypass defrosting mode, control the opening / closing of bypass defrosting circuit at intervals , and when the bypass defrosting circuit is closed, the outdoor fan is controlled to reverse the setting time; the opening time and setting time of the bypass defrosting circuit are based on t 上 , t 中 , t 下 Sure. The invention can accurately select the best defrosting mode, and efficiently blow off the melted frost layer, thereby greatly improving the defrosting efficiency of the air conditioner.

The invention belongs to the technical field of air conditioners, and in particular relates to a defrosting control method for an air conditioner. In order to improve the defrosting efficiency of theair conditioner, the defrosting control method for the air conditioner with a bypass defrosting loop comprises the following steps of acquiring an outer coil temperature Toil of the air conditioner when the air conditioner needs to enter into a defrosting mode; entering a bypass defrosting mode or a reverse cycle defrosting mode of the air conditioner selectively according to the Toil; when the air conditioner enters into the bypass defrosting mode, opening the bypass defrosting loop all the way, and controlling an outdoor fan to reverse for a second set time at every first setting time. The defrosting control method not only can select the optimal defrosting mode accurately, but also can control the outdoor fan to reverse intermittently to blow off a frost layer quickly by means of back blowing action of the outdoor fan, so that the defrosting efficiency is improved.

The invention belongs to the technical field of air conditioners, and specifically relates to a defrosting control method for an air conditioner. In order to increase the defrosting efficiency for theair conditioner, the defrosting control method for the air conditioner aims at the air conditioner with an outdoor unit which is provided with double fans. The method comprises the following steps ofafter the air conditioner enters a defrosting mode, controlling an upper fan and a lower fan to stop rotation; after a first set time, if I(lower) is not less than 1.1Ie and not greater than 1.2Ie, and I(upper) is greater than Ie and less than 1.1Ie, only controlling the upper fan to reversely rotate for a second set time; after the first set time is past, if I(lower) is greater than I(upper) andless than 1.1Ie, and I(upper) is greater than Ie, controlling the lower fan to reversely rotate for the second set time, and controlling the upper fan to reversely rotate for a third set time; and after the first set time is past, if I(lower) is greater than I(upper) and less than 1.1Ie, and I(upper) is equal to Ie, only controlling the lower fan to reversely rotate for the second set time. According to the defrosting control method for the air conditioner, the upper fan and / or the lower fan are / is selectively controlled to reversely rotate according to the I(upper) and the I(lower), and thena frost layer is accurately blown off, so that the defrosting efficiency for the air conditioner is greatly increased.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed by the present invention is aimed at the air conditioner with a bypass defrosting circuit, and the method includes the following steps: when the air conditioner needs to enter the defrosting mode, control the outdoor fan Stop rotating and open the bypass defrosting circuit; after the outdoor fan stops rotating for the first set time, control the outdoor fan to reverse for the second set time; when the outdoor fan reverses for the second set time, according to the outdoor fan The current selectively controls the outdoor fan to reverse for the second set time; when the outdoor fan is reversed, the bypass defrosting circuit is closed, and after the outdoor fan is reversed for the second set time, the bypass is turned on after the preset time through the defrost circuit. The invention can not only control the reverse timing of the outdoor fan more accurately, reduce the number of blowbacks of the outdoor fan, but also greatly improve the defrosting efficiency of the air conditioner.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed in the present invention is aimed at an air conditioner with a bypass defrosting circuit. The method includes the following steps: when the air conditioner needs to enter the defrosting mode, obtain the External coil temperature Toil; selectively make the air conditioner enter bypass defrosting mode or reverse cycle defrosting mode according to Toil; when the air conditioner enters bypass defrosting mode, control the opening / closing of bypass defrosting circuit at intervals , and when the bypass defrosting circuit is closed, the outdoor fan is controlled to reverse the set time; the opening time of the bypass defrosting circuit and the set time are based on t 上 , t 中 and t 下 The average value is determined. The invention can accurately select the best defrosting mode, and efficiently blow off the melted frost layer, thereby greatly improving the defrosting efficiency of the air conditioner.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method for an air conditioner. In order to improve defrosting efficiency of the air conditioner, the method disclosed by the invention comprises the following steps: controlling an outdoor fan to stop rotation after the air conditioner enters a defrosting mode; controlling the outdoorfan to reversely rotate by second set time after the outdoor fan stops rotation by first set time; and after the outdoor fan reversely rotates by second set time, controlling the outdoor fan to reversely rotate by second set time every third set time. The defrosting control method for the air conditioner is mainly as follows: after the air conditioner enters the defrosting mode, the outdoor fan is intermittently controlled to reversely rotate, i.e., the frost layer is quickly blown off by utilizing reverse-blowing action of the outdoor fan after the fan is controlled to reversely rotate by certain time every time defrosting is performed by certain time, and one part of frost is molten every time, so that defrosting efficiency is improved.

The invention discloses an environment-friendly defrosting air source gas heat pump, which belongs to the technical field of air source gas heat pumps. An environmentally friendly defrosting air source gas heat pump, including an outdoor heat exchanger and a gas engine with a controller inside, the outdoor heat exchanger is connected to the signal of the gas engine, the right end of the gas engine is provided with an exhaust hole, and the upper end of the gas engine is fixed. There is a push rod motor, and the push rod motor is electrically connected with the controller. The output end of the push rod motor is fixed with a connecting rod, and the inner thread of the exhaust hole is connected with a telescopic hose. The end of the connecting rod far away from the push rod motor is fixed to the bottom of the connecting pipe, which can realize the rapid defrosting operation of the outdoor heat exchanger through the alternating circulation of high-temperature flue gas and high-temperature water vapor, which is energy-saving and efficient. Air and high-temperature water vapor alternate cycle working mode, realize the rapid defrosting operation of the outdoor heat exchanger, energy saving and high efficiency.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed in the present invention is aimed at an air conditioner with dual fans installed on the outdoor unit. The method includes: after the air conditioner enters the defrosting mode, controlling the upper fan and the lower fan The fan stops rotating; after the first set time, the current I of the upper fan is detected respectively 上 and the current I of the lower fan 下 ;according to I 上 and I 下 Selectively control the reverse / stop rotation of the upper fan and the lower fan. The present invention according to I 上 and I 下 Selectively control the reversal of the upper fan and / or the lower fan, so as to accurately blow off the frost layer and greatly improve the defrosting efficiency of the air conditioner.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed in the present invention is aimed at the air conditioner with a bypass defrosting circuit, and the bypass defrosting circuit is arranged between the compressor and the outdoor unit of the air conditioner for The high-pressure gas discharged from the compressor is introduced into the outdoor unit to melt the frost layer on the coil of the outdoor unit. The method includes the following steps: when the air conditioner needs to enter the defrosting mode, selectively enter the bypass defrosting mode or reverse cycle defrosting mode Frost mode; after the air conditioner enters the defrosting mode, control the outdoor fan to reverse for the first set time, and then control the outdoor fan to reverse for the first set time every second set time. The present invention can not only selectively enter the bypass defrosting mode or the reverse cycle defrosting mode, but also control the reverse rotation of the outdoor fan at intervals, and use the back-blowing effect of the outdoor fan to quickly blow off the frost layer to improve defrosting. frost efficiency.