CN110749072A - Air conditioner and outdoor unit defrosting control method thereof - Google Patents
Air conditioner and outdoor unit defrosting control method thereof Download PDFInfo
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- CN110749072A CN110749072A CN201810814256.4A CN201810814256A CN110749072A CN 110749072 A CN110749072 A CN 110749072A CN 201810814256 A CN201810814256 A CN 201810814256A CN 110749072 A CN110749072 A CN 110749072A
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- air conditioner
- outdoor unit
- defrosting
- suction pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner and an outdoor unit defrosting control method thereof. The invention aims to solve the problem that the heating effect is easily seriously influenced by the frosting phenomenon of an outdoor unit because the conventional air conditioner cannot execute different defrosting methods according to different conditions. Therefore, the defrosting control method of the outdoor unit comprises the following steps: when the air conditioner is in heating operation, the suction pressure of the air conditioner and the coil temperature of the outdoor unit are obtained so as to judge the frosting degree of the outdoor unit; according to the air suction pressure of the air conditioner and the temperature of the coil of the outdoor unit, the air conditioner is selectively enabled to enter the corresponding outdoor unit defrosting mode, so that the air conditioner can select the optimal defrosting mode according to the frosting degree of the outdoor unit, and the problem that the heating effect is seriously influenced because the selected defrosting mode is not matched with the actual frosting condition of the existing air conditioner is effectively avoided.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner and an outdoor unit defrosting control method thereof.
Background
Along with the continuous improvement of living standard of people, people also put forward higher and higher requirements on living environment. In order to maintain a comfortable ambient temperature, an air conditioner has become an indispensable equipment in human life. Generally, an air conditioner includes an indoor unit, an outdoor unit, and a circulation loop for connecting the indoor unit and the outdoor unit, and a heat exchange medium in the air conditioner continuously exchanges heat between the outdoor unit and the indoor unit through the circulation loop, so as to achieve an effect of changing a room temperature. Taking the heating operation of the air conditioner as an example, the coil pipe of the outdoor unit is always in a low temperature state; at this moment, if the outdoor environment has when higher humidity, the coil pipe of off-premises station just produces the phenomenon of frosting very easily, and the production of this kind of phenomenon of frosting can seriously influence the heat exchange efficiency of off-premises station for the heat transfer effect of air conditioner constantly weakens, and then influences the comfort level of indoor environment. Therefore, the air conditioner needs to ensure that the coil of the outdoor unit does not frost during the heating operation of the air conditioner.
Specifically, two defrosting control methods mainly exist in the technical field of the existing air conditioner, and the first method is as follows: the air conditioner suspends the heating operation, so that the heat exchange medium in the circulating loop performs reverse circulation operation to realize defrosting; the second method is as follows: and a defrosting hot gas bypass pipeline is additionally arranged for the air conditioner, so that a high-temperature heat exchange medium discharged by the compressor is directly introduced into the outdoor heat exchanger to realize defrosting. It can be understood that the first defrosting control method has a good defrosting effect, but can affect the normal heating operation of the air conditioner; the second defrosting control method does not affect the normal heating operation of the air conditioner, but the defrosting effect is not very good. Each existing air conditioner can only execute one defrosting control method, so that the heating effect of the existing air conditioner is easily seriously affected by the frosting phenomenon of an outdoor unit.
Accordingly, there is a need in the art for a new air conditioner and an outdoor unit defrosting control method thereof to solve the above problems.
Disclosure of Invention
In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the heating effect of the existing air conditioner is easily and seriously affected by the frosting phenomenon of the outdoor unit because the existing air conditioner cannot execute different defrosting methods according to different situations, the present invention provides an outdoor unit defrosting control method for an air conditioner, wherein the defrosting control method comprises: when the air conditioner is in heating operation, acquiring the suction pressure of the air conditioner and the coil temperature of the outdoor unit; and selectively enabling the air conditioner to enter a corresponding outdoor unit defrosting mode according to the suction pressure of the air conditioner and the temperature of a coil of the outdoor unit.
In a preferred embodiment of the above-mentioned method for controlling defrosting of an outdoor unit of an air conditioner, the step of "selectively causing the air conditioner to enter a corresponding outdoor unit defrosting mode according to a suction pressure of the air conditioner and a coil temperature of the outdoor unit" includes: comparing the suction pressure to a preset suction pressure and the coil temperature to a first preset temperature and/or a second preset temperature; selectively enabling the air conditioner to enter a corresponding outdoor unit defrosting mode according to the comparison result of the suction pressure and the preset suction pressure and the comparison result of the coil temperature and the first preset temperature and/or the second preset temperature; wherein the first preset temperature is less than the second preset temperature.
In a preferred embodiment of the above-mentioned method for controlling defrosting of an outdoor unit of an air conditioner, "selectively enabling the air conditioner to enter a corresponding outdoor unit defrosting mode according to a comparison result between the suction pressure and the preset suction pressure and a comparison result between the coil temperature and the first preset temperature and/or the second preset temperature" includes: and if the suction pressure is greater than or equal to the preset suction pressure and the coil temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, enabling the air conditioner to enter a first defrosting mode.
In a preferred embodiment of the above-described defrosting control method for an outdoor unit of an air conditioner, the defrosting control method further includes: after the air conditioner enters the first defrosting mode, if the temperature of the coil of the outdoor unit is greater than or equal to a third preset temperature, the air conditioner is made to exit the first defrosting mode.
In a preferred embodiment of the above-described outdoor unit defrosting control method for an air conditioner, the step of "causing the air conditioner to enter the first defrosting mode" specifically includes: when the air conditioner is in heating operation, the heat exchange medium output by the compressor of the air conditioner is directly introduced into the air inlet of the heat exchanger of the outdoor unit.
In a preferred embodiment of the above-mentioned method for controlling defrosting of an outdoor unit of an air conditioner, "selectively enabling the air conditioner to enter a corresponding outdoor unit defrosting mode according to a comparison result between the suction pressure and the preset suction pressure and a comparison result between the coil temperature and the first preset temperature and/or the second preset temperature" includes: and if the suction pressure is smaller than the preset suction pressure and the coil temperature is smaller than the first preset temperature, enabling the air conditioner to enter a second defrosting mode.
In a preferred embodiment of the above-described defrosting control method for an outdoor unit of an air conditioner, the defrosting control method further includes: and after the air conditioner enters the second defrosting mode, if the temperature of the coil of the outdoor unit is greater than or equal to a fourth preset temperature, the air conditioner is made to exit the second defrosting mode.
In a preferred embodiment of the above-described outdoor unit defrosting control method for an air conditioner, the step of "causing the air conditioner to enter the second defrosting mode" specifically includes: and enabling the circulation loop of the air conditioner to perform reverse circulation operation of the heat exchange medium.
The invention also provides an air conditioner, which comprises a control device, wherein the control device can execute the defrosting control method of the outdoor unit in any one of the preferable technical scheme.
In a preferred technical solution of the above air conditioner, the air conditioner further includes a defrosting hot gas bypass line, and the defrosting hot gas bypass line is used for introducing a heat exchange medium discharged from a compressor of the air conditioner into a heat exchanger of the outdoor unit.
As can be understood by those skilled in the art, in an aspect of the present invention, a method for controlling defrosting of an outdoor unit of an air conditioner includes: when the air conditioner is in heating operation, acquiring the suction pressure of the air conditioner and the coil temperature of the outdoor unit so as to judge the frosting degree of the outdoor unit; according to the air suction pressure of the air conditioner and the temperature of the coil of the outdoor unit, the air conditioner is selectively enabled to enter the corresponding outdoor unit defrosting mode, so that the air conditioner can select the optimal defrosting mode according to the frosting degree of the outdoor unit.
Drawings
Fig. 1 is a schematic view of a system structure of an air conditioner of the present invention;
FIG. 2 is a flow chart of the main steps of the defrost control method of the present invention;
fig. 3 is a flowchart showing the detailed steps of the defrost control method of the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the steps of the method of the present invention are described herein in a particular order, these orders are not limiting, and one skilled in the art may perform the steps in a different order without departing from the underlying principles of the invention.
Based on the background art, each of the existing air conditioners can only execute a single defrosting control method, but cannot execute different defrosting methods according to different frosting conditions, so that the heating effect of the existing air conditioner is easily seriously affected by the frosting phenomenon of the outdoor unit. In order to solve the above problems, the present invention provides a defrost control method for an outdoor unit of an air conditioner, the defrost control method including: when the air conditioner is in heating operation, acquiring the suction pressure of the air conditioner and the coil temperature of the outdoor unit; and selectively enabling the air conditioner to enter a corresponding outdoor unit defrosting mode according to the suction pressure of the air conditioner and the temperature of a coil of the outdoor unit.
Referring first to fig. 1, a schematic diagram of a system structure of an air conditioner according to the present invention is shown; as shown in fig. 1, in the preferred embodiment, the air conditioner includes a main circulation loop and a defrosting hot gas bypass line communicated with the main circulation loop; the defrosting hot gas bypass pipeline is used for introducing a heat exchange medium discharged by the compressor 1 into the outdoor heat exchanger 4, the defrosting hot gas bypass pipeline is provided with an electromagnetic valve 6 so as to control the on-off of the defrosting hot gas bypass pipeline, and of course, the electromagnetic valve 6 can also be replaced by other components with switching functions. Meanwhile, it can be understood by those skilled in the art that the specific structure of the air conditioner and the specific type of the components used can be adjusted by those skilled in the art according to the actual use requirement, and the specific structure may be changed without departing from the scope of the present invention as long as the air conditioner is provided with a defrosting hot gas bypass line.
Further, the air conditioner further includes a control device capable of executing the defrosting control method of the present invention; of course, the control device may be an original controller of the air conditioner, or may be a controller separately installed by a technician for operating the control method. Meanwhile, a suction pressure sensor is arranged at a suction port of the compressor 1, a temperature sensor is arranged on a coil of the outdoor unit, and a control device of the air conditioner can acquire a suction pressure value of the compressor 1 through the suction pressure sensor and acquire a coil temperature of the outdoor unit through the temperature sensor. It will be understood by those skilled in the art that the present invention does not impose any limitation on the specific types of the suction pressure sensor and the temperature sensor, as long as the control device can obtain the suction pressure and the outside coil temperature through the suction pressure sensor and the temperature sensor, respectively.
It can be understood that, when the air conditioner is in heating operation, the temperature of the outdoor heat exchanger 4 is low, and at this time, the outdoor heat exchanger 4 is easy to generate a frosting phenomenon; in the invention, by arranging the defrosting hot gas bypass pipeline, part of high-temperature and high-pressure heat exchange medium discharged by the compressor 1 can be directly introduced into the outdoor heat exchanger 4 through the defrosting hot gas bypass pipeline, so that the temperature of the outdoor heat exchanger 4 is increased, and the frosting phenomenon is effectively relieved. It should be noted that, in the present embodiment, this defrosting mode is defined as a first defrosting mode; although the defrosting capacity is poor in the defrosting mode by using the defrosting hot gas bypass pipeline, the air conditioner can be ensured to continuously run in a heating mode; in other words, the defrosting mode has less influence on the heating capacity of the air conditioner, but when the outdoor heat exchanger 4 has a severe frosting phenomenon, the defrosting mode has difficulty in achieving a good defrosting effect. It should be noted that the connection positions of the two ends of the defrosting hot gas bypass pipeline are not fixed, and a technician can set the connection position of the defrosting hot gas bypass pipeline according to actual use conditions, as long as the defrosting hot gas bypass pipeline can introduce a high-temperature and high-pressure heat exchange medium into the outdoor heat exchanger 4. Meanwhile, the air conditioner has another defrosting mode, that is, the air conditioner can also perform reverse circulation on the heat exchange medium in the main circulation loop to enable the outdoor heat exchanger 4 to work as a condenser, so that a defrosting effect is achieved. Here, it should be noted that, in the present embodiment, this defrosting mode is defined as a second defrosting mode; although this method of performing defrosting by reversely circulating the heat exchange medium has a good defrosting effect, the air conditioner needs to stop heating operation, and thus, the heating amount of the air conditioner is inevitably seriously affected by the operation of the second defrosting mode.
Referring next to fig. 2, a flowchart of the main steps of the defrost control method of the present invention is shown. As shown in fig. 2, the steps of the defrosting control method mainly include:
s1: when the air conditioner is in heating operation, acquiring the suction pressure of the air conditioner and the coil temperature of an outdoor unit;
s2: and selectively enabling the air conditioner to enter a corresponding outdoor unit defrosting mode according to the suction pressure of the air conditioner and the temperature of a coil of the outdoor unit.
Further, in step S1, the control device of the air conditioner can obtain the suction pressure of the air conditioner and the coil temperature of the outdoor unit through the suction pressure sensor and the temperature sensor, so that the control device can determine the frosting condition of the outdoor unit by using the suction pressure and the coil temperature as basic parameters. Next, in step S2, the control device can selectively cause the air conditioner to enter the corresponding outdoor unit defrosting mode according to the suction pressure and the coil temperature. The control method comprises the steps that the control device can judge the frosting degree of the outdoor unit by combining the suction pressure and the coil temperature, so that the air conditioner can select different defrosting modes according to the frosting degree of the outdoor unit.
Referring next to fig. 3, a flowchart illustrating the specific steps of the defrost control method of the present invention is shown. As shown in fig. 3, the defrosting control method specifically includes the steps of:
s11: when the air conditioner is in heating operation, acquiring the suction pressure Ps of the air conditioner and the coil temperature Te of an outdoor unit;
s12: comparing the suction pressure Ps with a preset suction pressure P1, and comparing the coil temperature Te with a first preset temperature T1 and/or a second preset temperature T2;
s13: when Ps is more than or equal to P1 and Te is more than or equal to T1 and less than or equal to T2, enabling the air conditioner to enter a first defrosting mode;
s14: when Te is larger than or equal to T3, the air conditioner exits the first defrosting mode;
s15: when Ps is less than P1 and Te is less than T1, the air conditioner enters a second defrosting mode;
s16: and when Te is larger than or equal to T4, the air conditioner exits the second defrosting mode.
Further, in step S11, the control device of the air conditioner can obtain the suction pressure Ps of the air conditioner and the coil temperature Te of the outdoor unit through the suction pressure sensor and the temperature sensor, so that the control device can determine the frosting condition of the outdoor unit by using the suction pressure Ps and the coil temperature Te as basic parameters. Next, step S12 is executed, and the control device can compare the suction pressure Ps with a preset suction pressure P1, and simultaneously compare the coil temperature Te with the first preset temperature T1 and/or the second preset temperature T2, respectively, so as to determine the frosting degree of the outdoor unit according to the comparison result between the measured value and the standard value.
It should be noted that, as a preferred embodiment, the preset suction pressure P1 is set to 0.5MPa, and it can be known by those skilled in the art that, when the suction pressure is 0.5MPa, the corresponding saturated evaporation temperature is-8.8 ℃, and repeated experiments show that, when the suction pressure of the air conditioner is less than 0.5MPa, the air conditioner starts to have a severe frosting phenomenon, so the preferred embodiment effectively analyzes the severity of the outdoor unit frosting by setting the preset suction pressure P1 to 0.5 MPa. In order to further improve the accuracy of the judgment result, the control device needs to compare the coil temperature Te with the first preset temperature T1 and/or the second preset temperature T2, preferably, the first preset temperature T1 is set to-9 ℃, the second preset temperature T2 is set to-3 ℃, and after many experiments, the frosting condition of the outdoor unit is still in a light state when the coil temperature Te is between-3 ℃ and-9 ℃. Of course, it can be understood by those skilled in the art that the specific values of the preset suction pressure P1, the first preset temperature T1 and the second preset temperature T2 can be set by those skilled in the art according to the actual situation.
Further, in step S13, if the control device determines that Ps is not less than P1 and T1 is not less than Te is not less than T2, it indicates that the outdoor unit is still in a state with a light frosting condition, and at this time, the air conditioner enters a first defrosting mode, that is, the air conditioner can directly introduce part of the high-temperature and high-pressure heat exchange medium discharged by the compressor 1 into the outdoor heat exchanger 4 through the defrosting hot gas bypass pipeline, so as to increase the temperature of the outdoor heat exchanger 4 to alleviate the frosting phenomenon. It can be understood that, because the frosting degree of the outdoor unit is light, the air conditioner can achieve the defrosting purpose only by performing auxiliary defrosting through the defrosting hot gas bypass pipeline, and meanwhile, the air conditioner can be effectively ensured to continuously heat so as to effectively ensure the heating capacity of the air conditioner.
Furthermore, in step S14, after the air conditioner enters the first defrosting mode, if the control device determines that Te is greater than or equal to T3, the air conditioner is exited from the first defrosting mode. It can be understood that, when the coil temperature Te reaches the third preset temperature, the control device defaults to that the outdoor unit has finished defrosting, and at this time, the air conditioner needs to exit from the first defrosting mode, so as to effectively save energy and further effectively ensure the heating effect of the air conditioner. Preferably, the third preset temperature is 3 ℃; of course, the specific value of the third preset temperature can be set by a technician according to the actual use requirement.
Referring to fig. 3, if the control device determines that Ps < P1 and Te < T1 in step S15, it indicates that the outdoor unit of the air conditioner is in a state of severe frosting, and then the air conditioner enters a second defrosting mode, i.e., stops heating operation, and reversely circulates the heat exchange medium in the main circulation circuit of the air conditioner to operate the outdoor heat exchanger 4 as a condenser, thereby achieving better defrosting effect. It can be understood that, at this time, since the degree of frosting of the outdoor unit is already serious, the first defrosting mode is operated, and thus, complete defrosting cannot be achieved, and at this time, the air conditioner is operated in the second defrosting mode, so that defrosting of the outdoor unit can be rapidly achieved, and the air conditioner can return to a normal heating state as soon as possible.
Further, in step S16, after the air conditioner enters the second defrost mode, if the control device determines that Te is greater than or equal to T4, the air conditioner is exited from the second defrost mode. It can be understood that, when the coil temperature Te reaches the fourth preset temperature, the control device defaults to defrosting the outdoor unit, and at this time, the air conditioner needs to exit the second defrosting mode, so that the air conditioner can operate the heating mode as soon as possible, thereby ensuring the average heating capacity of the air conditioner to the maximum extent. Preferably, the fourth preset temperature is 15 ℃; of course, the technician can set the specific value of the fourth preset temperature according to the actual use requirement.
Finally, as one embodiment, when the control device compares the suction pressure Ps with a preset suction pressure P1 and compares the coil temperature Te with the first preset temperature T1 and/or the second preset temperature T2, respectively, and if other comparison results occur, it indicates that the control device is difficult to accurately determine the frosting condition of the outdoor unit, and at this time, the air conditioner may need to combine other parameters to determine the frosting condition of the outdoor unit or may directly set the determination result as that the outdoor unit does not need to perform the defrosting operation. In other words, the technician can set the operation corresponding to the other comparison result according to the actual condition of the air conditioner.
Finally, it should be noted that the above examples are all preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. When the present invention is actually used, a part of the steps may be added or deleted as needed or the order between the different steps may be changed by those skilled in the art. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
So far, the preferred embodiments of the present invention have been described in conjunction with the accompanying drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. An outdoor unit defrosting control method for an air conditioner, the defrosting control method comprising:
when the air conditioner is in heating operation, acquiring the suction pressure of the air conditioner and the coil temperature of the outdoor unit;
and selectively enabling the air conditioner to enter a corresponding outdoor unit defrosting mode according to the suction pressure of the air conditioner and the temperature of a coil of the outdoor unit.
2. The outdoor unit defrosting control method of claim 1, wherein the step of selectively entering the air conditioner into the corresponding outdoor unit defrosting mode according to the suction pressure of the air conditioner and the coil temperature of the outdoor unit comprises:
comparing the suction pressure to a preset suction pressure and the coil temperature to a first preset temperature and/or a second preset temperature;
selectively enabling the air conditioner to enter a corresponding outdoor unit defrosting mode according to the comparison result of the suction pressure and the preset suction pressure and the comparison result of the coil temperature and the first preset temperature and/or the second preset temperature;
wherein the first preset temperature is less than the second preset temperature.
3. The outdoor unit defrosting control method of claim 2, wherein the step of selectively putting the air conditioner into the corresponding outdoor unit defrosting mode according to the comparison result of the suction pressure and the preset suction pressure and the comparison result of the coil temperature and the first preset temperature and/or the second preset temperature specifically comprises:
and if the suction pressure is greater than or equal to the preset suction pressure and the coil temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, enabling the air conditioner to enter a first defrosting mode.
4. The outdoor unit defrosting control method of claim 3, further comprising:
after the air conditioner enters the first defrosting mode, if the temperature of the coil of the outdoor unit is greater than or equal to a third preset temperature, the air conditioner is made to exit the first defrosting mode.
5. The outdoor unit defrosting control method according to claim 3, wherein the step of causing the air conditioner to enter the first defrosting mode specifically includes:
when the air conditioner is in heating operation, the heat exchange medium output by the compressor of the air conditioner is directly introduced into the air inlet of the heat exchanger of the outdoor unit.
6. The outdoor unit defrosting control method of any one of claims 2 to 5, wherein the step of selectively causing the air conditioner to enter the corresponding outdoor unit defrosting mode according to the comparison result of the suction pressure and the preset suction pressure and the comparison result of the coil temperature and the first preset temperature and/or the second preset temperature specifically comprises:
and if the suction pressure is smaller than the preset suction pressure and the coil temperature is smaller than the first preset temperature, enabling the air conditioner to enter a second defrosting mode.
7. The outdoor unit defrosting control method of claim 6, further comprising:
and after the air conditioner enters the second defrosting mode, if the temperature of the coil of the outdoor unit is greater than or equal to a fourth preset temperature, the air conditioner is made to exit the second defrosting mode.
8. The outdoor unit defrosting control method of claim 6, wherein the step of causing the air conditioner to enter the second defrosting mode specifically comprises:
and enabling the circulation loop of the air conditioner to perform reverse circulation operation of the heat exchange medium.
9. An air conditioner characterized by comprising a control device capable of executing the defrosting control method according to any one of claims 1 to 8.
10. The air conditioner according to claim 9, further comprising a defrosting hot gas bypass line,
the defrosting hot gas bypass pipeline is used for introducing a heat exchange medium discharged by a compressor of the air conditioner into a heat exchanger of the outdoor unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810814256.4A CN110749072A (en) | 2018-07-23 | 2018-07-23 | Air conditioner and outdoor unit defrosting control method thereof |
| PCT/CN2019/088231 WO2020019849A1 (en) | 2018-07-23 | 2019-05-24 | Air conditioner and outdoor unit defrosting control method thereof |
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| CN201810814256.4A CN110749072A (en) | 2018-07-23 | 2018-07-23 | Air conditioner and outdoor unit defrosting control method thereof |
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| CN111425990A (en) * | 2020-03-04 | 2020-07-17 | 青岛海尔空调电子有限公司 | Defrosting control method of multi-split air conditioning system |
| CN111692706A (en) * | 2020-06-05 | 2020-09-22 | 宁波奥克斯电气股份有限公司 | Defrosting control method and device and air conditioner |
| CN112066463A (en) * | 2020-09-18 | 2020-12-11 | 广东积微科技有限公司 | Control method and heat control device for chassis heater of air conditioner outdoor unit and air conditioner |
| CN113465127A (en) * | 2021-06-22 | 2021-10-01 | 青岛海尔空调电子有限公司 | Anti-frosting control method of air conditioner and air conditioner |
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