CN112484239B - Air conditioner defrosting method and air conditioner - Google Patents
Air conditioner defrosting method and air conditioner Download PDFInfo
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- CN112484239B CN112484239B CN202011517781.3A CN202011517781A CN112484239B CN 112484239 B CN112484239 B CN 112484239B CN 202011517781 A CN202011517781 A CN 202011517781A CN 112484239 B CN112484239 B CN 112484239B
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- 238000010257 thawing Methods 0.000 title claims abstract description 178
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 45
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 12
- 238000001816 cooling Methods 0.000 description 6
- 239000003507 refrigerant Substances 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner defrosting method and an air conditioner, wherein the air conditioner defrosting method comprises the following steps: judging whether the heating mode is in; if yes, detecting the indoor environment temperature, the outdoor environment temperature and the last defrosting time; judging whether the air conditioner meets defrosting conditions or not; if yes, further judging which temperature zone the outdoor environment temperature is in: a low temperature zone, a medium temperature zone, a high temperature zone; if the outdoor environment temperature is in a low-temperature region, entering a defrosting mode according to a shutdown defrosting mode; if the outdoor environment temperature is in a high-temperature area, entering a defrosting mode according to a non-stop defrosting mode; and if the outdoor environment temperature is in the middle temperature area, further judging which mode to enter the defrosting mode according to the indoor environment temperature and the last defrosting time. Therefore, the defrosting control rule is optimized, the defrosting waiting time and the refrigerating and heating conversion time are reduced, and the comfort of a user in the heating process by using an air conditioner is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner defrosting method and an air conditioner.
Background
When the air conditioner is operated for heating, in order to improve the continuous heating effect of the air conditioner, the outdoor coil pipe of the air conditioner needs to be timely and effectively defrosted. The conventional defrosting mode is to detect the outdoor coil temperature Tw and the outdoor environment temperature Tout, and use the difference Δ Tc between the outdoor environment temperature Tout and the outdoor coil temperature Tw as a defrosting determination basis. When the air conditioner meets the condition of entering defrosting, the defrosting is entered. Once the parameter for judging the defrosting is set, the air conditioner controls the defrosting according to the mode.
Generally, when the temperature of the outdoor coil of the air conditioner meets the defrosting exit condition Tw ═ a ℃, and the defrosting time meets t ═ tmax minutes, the unit exits the defrosting process and reenters the heating process. In the process of heating to defrosting, a 1-minute halt process exists, and when defrosting is completed, in the process of heating again, a 1-minute halt process also exists, so that in the process of interconversion of refrigeration and heating of the compressor, liquid refrigerants are prevented from impacting the compressor, and the compressor is prevented from being damaged or damaged.
The defrosting mode can better finish the defrosting function, but when the environmental temperature is higher, the liquid refrigerant has little impact on the compressor, if the method is adopted for defrosting, the defrosting time is longer, the defrosting waiting time is longer, and meanwhile, the compressor is restarted twice, the time spent is longer, and the user experience is poorer; meanwhile, because the time for restarting the compressor is reduced, the corresponding defrosting time is also reduced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention aims to provide an air conditioner defrosting method and an air conditioner.
The defrosting method of the air conditioner according to the embodiment of the first aspect of the invention comprises the following steps: judging whether the heating mode is in; if yes, detecting the indoor environment temperature, the outdoor environment temperature and the last defrosting time; judging whether the air conditioner meets defrosting conditions or not; if yes, further judging which temperature zone the outdoor environment temperature is in: a low temperature zone, a medium temperature zone, a high temperature zone; if the outdoor environment temperature is in a low-temperature region, entering a defrosting mode according to a shutdown defrosting mode; if the outdoor environment temperature is in a high-temperature area, entering a defrosting mode according to a non-stop defrosting mode; if the outdoor environment temperature is in the middle temperature area, further judging which mode to enter the defrosting mode according to the indoor environment temperature and the last defrosting time: stopping the defrosting mode, and stopping the defrosting mode; judging whether a defrosting exit condition is met; and if so, exiting the defrosting mode and re-entering the heating mode.
Therefore, the indoor environment temperature Tin and the outdoor environment temperature Tout of the air conditioner are detected, the temperature zone where the air conditioner works is judged according to the outdoor environment temperature Tout, and whether the air conditioner stops before entering a defrosting mode is controlled according to the detected indoor and outdoor temperature conditions, so that the defrosting control rule is optimized, the defrosting waiting time and the refrigerating and heating conversion time are reduced, and the comfort of a user in the heating process by using the air conditioner is improved.
In some embodiments, when the first preset temperature is greater than or equal to the outdoor environment temperature and greater than or equal to the second preset temperature, the temperature is in the middle temperature area; when the outdoor environment temperature is more than or equal to a first preset temperature, the outdoor environment temperature is in a high-temperature area; when the outdoor environment temperature is less than or equal to a second preset temperature, the outdoor environment temperature is in a low-temperature area; wherein the first preset temperature is selected from 7-10 ℃, and the second preset temperature is selected from 2-4 ℃.
In some embodiments, when the outdoor ambient temperature is in the middle temperature zone, first determining whether the indoor ambient temperature is less than or equal to a third preset temperature, where the third preset temperature is selected from 16 ℃ to 20 ℃; if so, further judging whether the last defrosting time is larger than or equal to a first preset time, wherein the first preset time is tmax-t 1; and if so, entering a defrosting mode according to a shutdown defrosting mode.
In some embodiments, if the indoor ambient temperature > a third preset temperature, the defrost mode is entered without stopping the defrost.
In some embodiments, if the last defrost time is less than the first preset time, the defrost mode is entered without stopping the defrost.
In some embodiments, entering the defrost mode in a shutdown defrost mode includes: the heating mode is quitted, the compressor is stopped, the four-way valve is powered off after the second preset time, the compressor is started up after the third preset time, and the compressor operates according to the defrosting mode; after entering the defrosting mode according to the shutdown defrosting mode, exiting the defrosting mode according to the following modes: and delaying the fourth preset time to electrify the four-way valve, and starting the compressor at the interval of the fifth preset time.
In some embodiments, entering the defrost mode in a non-stop defrost mode includes: the heating mode is exited, the compressor is still in the running state, the four-way valve is powered off, and the four-way valve runs according to the defrosting mode; exit defrost mode as follows: and the four-way valve is electrified, and the compressor is still in a running state.
In some embodiments, after exiting the heating mode, the compressor frequency is first reduced to a predetermined frequency, the four-way valve is then de-energized, and then the compressor frequency is increased to a normal operating frequency.
In some embodiments, the magnitude of the preset frequency is determined by a difference between the indoor environment temperature at the time of entering the defrosting at this time and the indoor environment temperature at the time of entering the defrosting at the last time, when the difference is positive, the value of the preset frequency is increased, and when the difference is negative, the value of the preset frequency is decreased.
An air conditioner according to an embodiment of a second aspect of the present invention includes: the system comprises a temperature acquisition module, a controller, a compressor and a four-way valve, wherein the acquisition module is used for detecting the indoor environment temperature; the controller is electrically connected with the temperature acquisition module to acquire the indoor environment temperature, judge a temperature zone where the outdoor environment temperature is located and further judge how to enter a defrosting mode according to the temperature; the compressor is electrically connected with the controller so as to stop for preset time in the defrosting mode in and out in the stop defrosting mode; the four-way valve is electrically connected with the controller and is opened and closed when the defrosting mode is stopped and extends downwards.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of a defrosting control method of an air conditioner according to an embodiment of the present invention.
Fig. 2 is a power operating curve for entering defrost mode with shutdown defrost.
Fig. 3 is a power operation curve for entering the defrost mode without stopping the defrost.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
A defrosting method of an air conditioner according to an embodiment of the present invention will be described with reference to fig. 1 to 3.
As shown in fig. 1, an air conditioner defrosting method according to an embodiment of a first aspect of the present invention includes:
s1: judging whether the heating mode is in;
s2: if yes, detecting the indoor environment temperature Tin, the outdoor environment temperature Tout and the last defrosting time;
s3: judging whether the air conditioner meets defrosting conditions or not;
s4: if yes, further judging which temperature zone the outdoor environment temperature is in: a low temperature zone, a medium temperature zone, a high temperature zone;
s41: if the outdoor environment temperature is in a low-temperature region, entering a defrosting mode according to a shutdown defrosting mode;
s42: if the outdoor environment temperature is in a high-temperature area, entering a defrosting mode according to a non-stop defrosting mode;
s43: if the outdoor environment temperature is in the middle temperature area, further judging which mode to enter the defrosting mode according to the indoor environment temperature Tin and the last defrosting time: stopping the defrosting mode, and stopping the defrosting mode;
s5: judging whether a defrosting exit condition is met;
s6: and if so, exiting the defrosting mode and re-entering the heating mode.
Therefore, the indoor environment temperature Tin and the outdoor environment temperature Tout of the air conditioner are detected, the temperature zone where the air conditioner works is judged according to the outdoor environment temperature Tout, and whether the air conditioner stops before entering a defrosting mode is controlled according to the detected indoor and outdoor temperature conditions, so that the defrosting control rule is optimized, the defrosting waiting time and the refrigerating and heating conversion time are reduced, and the comfort of a user in the heating process by using the air conditioner is improved.
When the first preset temperature is not less than the outdoor environment temperature Tout is not less than the second preset temperature, the temperature is in the middle temperature area; when the outdoor environment temperature Tout is more than or equal to a first preset temperature, the outdoor environment temperature Tout is in a high temperature area; when the outdoor environment temperature Tout is less than or equal to a second preset temperature, the outdoor environment temperature Tout is in a low-temperature area; wherein the first preset temperature is selected from 7-10 ℃, and the second preset temperature is selected from 2-4 ℃. Therefore, the three temperature zones of the outdoor environment temperature adopt the temperature boundary lines, and the boundary division is more reasonable.
Therefore, when the environment temperature is higher, the defrosting can be carried out without stopping, the defrosting and heating process can be carried out in a defrosting mode without stopping, and if the environment temperature is moderate, a mixed defrosting mode can be adopted.
In some embodiments, S431: when the outdoor environment temperature is in the middle temperature zone, firstly judging whether the indoor environment temperature is less than or equal to a third preset temperature, wherein the third preset temperature is selected from 16-20 ℃.
S432: if yes, whether the last defrosting time is larger than or equal to a first preset time is further judged, and the first preset time is tmax-t 1.
S433: and if so, entering a defrosting mode according to a shutdown defrosting mode.
S434: when the outdoor environment temperature is in the middle temperature zone, if the indoor environment temperature is higher than the third preset temperature, the defrosting mode is started in a non-stop defrosting mode.
S435: when the outdoor environment temperature is in the middle temperature zone, if the last defrosting time is less than the first preset time, the defrosting mode is started in a non-stop defrosting mode.
In other words, when the detected outdoor environment temperature Tout is between the first preset temperature T1 and the second preset temperature T2, i.e. T2 ≦ Tout 1(T2 may be set to 4 ℃, and the temperature may be adjusted), it is determined that the air-conditioning working environment is the middle temperature zone, and then it is further determined that:
if the indoor environment temperature Tin is less than or equal to a third preset temperature T3, namely the Tin is less than or equal to T3 (the temperature can be set to be 20 ℃, and can be adjusted), the last defrosting time of the air conditioner is more than or equal to (tmax-T1) minutes (the numerical value of tmax can be adjusted and is temporarily set to be 12, the numerical value of T1 can be adjusted and is temporarily set to be 6), and the shutdown defrosting is adopted.
Secondly, if the indoor environment temperature Tin is less than or equal to a third preset temperature T3 (which can be set to be 20 ℃ and the temperature can be adjusted), and the last defrosting time of the air conditioner is less than (tmax-T1) minutes, the frosting is not thick at the moment, the environment is not severe, and the air conditioner is in a good working environment. Therefore, when the air conditioner is defrosting, the defrosting can be carried out without stopping, and after the defrosting is finished, the compressor does not stop working, but is directly switched to heating working.
And thirdly, if the indoor environment temperature Tin is greater than a third preset temperature T3 (the temperature can be set to be 20 ℃ and can be adjusted), the environment is not severe, and the air conditioner is in a good working environment. Therefore, when the air conditioner is switched from heating to defrosting, defrosting can be carried out without stopping, and after defrosting is finished, the compressor does not stop working, but is directly switched to heating.
If the outdoor environment temperature is not in the middle temperature area, executing the following steps:
s44: and further judging whether the outdoor environment temperature is greater than a first preset temperature.
S441: when the detected outdoor environment temperature Tout is greater than a first preset temperature T1, namely Tout is greater than T1 (which can be set to be 7 ℃ and the temperature can be adjusted), the working environment of the air conditioner is judged to be a high-temperature area, and the air conditioner adopts a 'defrosting without stopping' mode when defrosting. The 'defrosting without stopping machine' is that the original heating mode is changed over by the four-way valve and is directly converted into the cooling mode.
S442: when the detected outdoor environment temperature Tout is less than a second preset temperature T2(T2 can be set to be 4 ℃, and the temperature can be adjusted), the temperature is judged to be a low-temperature region, and the air conditioner adopts a shutdown defrosting mode.
In some embodiments, as shown in fig. 2, entering the defrost mode in the shutdown defrost mode includes: and exiting the heating mode, stopping the compressor, powering off the four-way valve after the second preset time, starting the compressor at intervals of third preset time, and operating according to the defrosting mode. The four-way valve is a valve for controlling the refrigeration cycle and the heating cycle, and when the four-way valve is opened, the air conditioner is in the heating cycle; when the four-way valve is closed, the air conditioner is in refrigeration cycle.
Further, after entering the defrosting mode according to the shutdown defrosting mode, exiting the defrosting mode according to the following modes: and delaying the fourth preset time to electrify the four-way valve, and starting the compressor at the interval of the fifth preset time. Specifically, the second preset time and the fifth preset time may be 50 seconds, and the third preset time and the fourth preset time may be 10 seconds.
Therefore, the shutdown defrosting mode enables the air conditioner to be adjusted for a short time when entering defrosting and exiting defrosting, and reduces the impact of a refrigerant on the compressor in the heating and refrigerating conversion process.
In some embodiments, as shown in fig. 3, entering the defrost mode in a non-stop defrost mode includes: and (4) exiting from the heating mode, keeping the compressor in the running state, powering off the four-way valve, and running according to the defrosting mode. Exit defrost mode as follows: and the four-way valve is electrified, and the compressor is still in a running state. When the defrosting mode without stopping is adopted, the current running frequency of the compressor can be kept unchanged, the original heating state is converted into the cooling state, namely the running frequency of the compressor in the cooling state is consistent with the running frequency of the compressor in the heating process.
In a preferred embodiment, after exiting the heating mode, the compressor frequency is first reduced to a predetermined frequency, the four-way valve is then de-energized, and the compressor frequency is then increased to a normal operating frequency. The predetermined frequency is a lower switching frequency point. When the frequency of the compressor is reduced to the frequency point, the original heating state is switched to a cooling (defrosting) state. The compressor frequency is reduced, then switched to the cooling mode, and then increased to the normal operating frequency. Therefore, the frequency of the compressor is reduced firstly, and then the four-way valve is switched, so that the impact of the refrigerant on the compressor in the heating-to-cooling process can be reduced.
Similarly, when the air conditioner exits the defrosting mode and is converted into heating operation again, the compression frequency is firstly reduced when the non-stop defrosting mode is adopted, and when the frequency of the compressor is reduced to the frequency point, the original refrigeration state is converted into the heating state, and then the heating state is increased to the normal operation frequency.
Optionally, the preset frequency depends on a difference between the indoor environment temperature when the defrosting is performed this time and the indoor environment temperature when the defrosting is performed last time, when the difference is positive, the value of the preset frequency is increased, and when the difference is negative, the value of the preset frequency is decreased. In other words, each time defrosting is resumed, the switching frequency point can be adjusted according to the ambient temperature conditions in the front and rear rooms. If the indoor ambient temperature at the time of entering the defrosting operation this time is increased relative to the indoor ambient temperature at the time of entering the defrosting operation last time, the switching frequency point may also be increased.
An air conditioner according to an embodiment of a second aspect of the present invention includes: temperature acquisition module, controller, compressor, cross valve. The acquisition module is used for detecting the indoor environment temperature and the outdoor environment temperature; the controller is electrically connected with the temperature acquisition module to acquire the indoor environment temperature and the outdoor environment temperature, judge the temperature zone where the outdoor environment temperature is located and further judge how to enter the defrosting mode according to the temperature; the compressor is electrically connected with the controller so as to stop for a preset time in the defrosting mode in and out in the stop defrosting mode; the four-way valve is electrically connected with the controller and is opened and closed when the defrosting mode is stopped.
Therefore, the indoor environment temperature Tin and the outdoor environment temperature Tout of the air conditioner are detected, the temperature zone in which the air conditioner works is judged according to the outdoor environment temperature Tout, and whether the air conditioner is stopped before entering the defrosting mode is controlled according to the detected indoor and outdoor temperature conditions, so that the feeling of poor experience of a user in the heating process is reduced.
Various embodiments of the present invention are described in detail below with reference to the following figures:
the first embodiment is as follows:
when the detected outdoor environment temperature Tout is 8 ℃, the temperature is judged to be a high temperature region, and the air conditioner adopts non-stop defrosting.
Example two:
when the detected outdoor environment temperature Tout is 6 ℃, the air conditioner is judged to work in the medium temperature area, if the indoor environment temperature Tin is 12 ℃ at the moment, and the last defrosting time of the air conditioner is 8 minutes, the air conditioner is stopped to defrost.
Example three:
when the detected outdoor environment temperature Tout is 5 ℃, the air conditioner is judged to work in a medium temperature area, if the indoor environment temperature Tin is 16 ℃ at the moment and the last defrosting time of the air conditioner is 4 minutes, the frosting of the outdoor heat exchanger of the air conditioner is not very thick at the moment, the environment is not very severe, and the air conditioner is in a good working environment. Therefore, when the air conditioner is defrosting, the defrosting can be carried out without stopping, and after the defrosting is finished, the compressor does not stop working, but is directly switched to heating working.
Example four:
and when the detected outdoor environment temperature Tout is 5 ℃, the temperature is judged to be a medium temperature region, and if the indoor environment temperature Tin of the air conditioner is 25 ℃, the environment is not very severe at the moment, and the air conditioner is in a good working environment. Therefore, when the air conditioner is defrosting, the defrosting can be carried out without stopping, and after the defrosting is finished, the compressor does not stop working, but is directly switched to heating working.
Example five:
when the detected outdoor environment temperature Tout is 1 ℃, the air conditioner is judged to work in a low-temperature area, and the air conditioner adopts a shutdown defrosting mode.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An air conditioner defrosting method is characterized by comprising the following steps:
judging whether the heating mode is in;
if yes, detecting the indoor environment temperature, the outdoor environment temperature and the last defrosting time;
judging whether the air conditioner meets defrosting conditions or not;
if yes, further judging which temperature zone the outdoor environment temperature is in: a low temperature zone, a medium temperature zone, a high temperature zone;
if the outdoor environment temperature is in a low-temperature region, entering a defrosting mode according to a shutdown defrosting mode;
if the outdoor environment temperature is in a high-temperature area, entering a defrosting mode according to a non-stop defrosting mode;
if the outdoor environment temperature is in the middle temperature area, further judging which mode to enter the defrosting mode according to the indoor environment temperature and the last defrosting time: stopping the defrosting mode, and stopping the defrosting mode;
judging whether a defrosting exit condition is met;
and if so, exiting the defrosting mode and re-entering the heating mode.
2. The defrosting method for an air conditioner according to claim 1, wherein when the first preset temperature is greater than or equal to the outdoor environment temperature and greater than or equal to the second preset temperature, the air conditioner is in the intermediate temperature zone;
when the outdoor environment temperature is more than or equal to a first preset temperature, the outdoor environment temperature is in a high-temperature area;
when the outdoor environment temperature is less than or equal to a second preset temperature, the outdoor environment temperature is in a low-temperature area;
wherein the first preset temperature is selected from 7-10 ℃, and the second preset temperature is selected from 2-4 ℃.
3. The defrosting method of an air conditioner according to claim 1, wherein when the outdoor environment temperature is in the middle temperature zone, it is first determined whether the indoor environment temperature is not greater than a third preset temperature, the third preset temperature being selected from 16 ℃ to 20 ℃;
if so, further judging whether the last defrosting time is larger than or equal to a first preset time, wherein the first preset time is tmax-t 1;
and if so, entering a defrosting mode according to a shutdown defrosting mode.
4. The defrosting method of an air conditioner according to claim 3, wherein if the indoor ambient temperature is greater than the third preset temperature, the defrosting mode is entered in a non-stop defrosting manner.
5. The defrosting method of an air conditioner according to claim 3, wherein if the last defrosting time is less than the first preset time, the defrosting mode is entered in a non-stop defrosting manner.
6. Defrosting method of an air conditioner according to any of claims 1 to 5,
entering a defrost mode in a shutdown defrost mode includes: the heating mode is quitted, the compressor is stopped, the four-way valve is powered off after the second preset time, the compressor is started up after the third preset time, and the compressor operates according to the defrosting mode;
after entering the defrosting mode according to the shutdown defrosting mode, exiting the defrosting mode according to the following modes: and delaying the fourth preset time to electrify the four-way valve, and starting the compressor at the interval of the fifth preset time.
7. Defrosting method of an air conditioner according to any of claims 1 to 5,
entering a defrost mode in a non-stop defrost mode includes: the heating mode is exited, the compressor is still in the running state, the four-way valve is powered off, and the four-way valve runs according to the defrosting mode;
exit defrost mode as follows: and the four-way valve is electrified, and the compressor is still in a running state.
8. The defrosting method of an air conditioner according to claim 7, wherein after exiting the heating mode, the frequency of the compressor is first decreased to a preset frequency, then the four-way valve is powered off, and then the frequency of the compressor is increased to a normal operation frequency.
9. The defrosting method for an air conditioner according to claim 8, wherein the magnitude of the preset frequency is determined by a difference between the indoor ambient temperature at the time of entering the defrosting operation this time and the indoor ambient temperature at the time of entering the defrosting operation last time, and when the difference is positive, the value of the preset frequency is increased, and when the difference is negative, the value of the preset frequency is decreased.
10. An air conditioner employing the air conditioner defrosting method according to any one of claims 1 to 9, the air conditioner comprising:
the temperature acquisition module is used for detecting the indoor environment temperature and the outdoor environment temperature;
the controller is electrically connected with the temperature acquisition module to acquire the indoor environment temperature and the outdoor environment temperature, judge a temperature zone where the outdoor environment temperature is located, and further judge how to enter a defrosting mode according to the temperature;
the compressor is electrically connected with the controller, and stops for a preset time in a defrosting mode in a stopping mode;
and the four-way valve is electrically connected with the controller and is opened and closed when the defrosting mode is stopped and extends downwards.
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| CN113819578B (en) * | 2021-10-25 | 2022-10-28 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and air conditioner |
| CN114413415B (en) * | 2021-12-15 | 2023-05-12 | 珠海格力电器股份有限公司 | Defrosting control method of air conditioner and controller thereof |
| CN115200176B (en) * | 2022-05-24 | 2023-09-08 | 宁波奥克斯电气股份有限公司 | Control method, control device and multi-unit air conditioner for parallel defrost of multiple outdoor units |
| CN114963451B (en) * | 2022-05-30 | 2023-08-18 | 宁波奥克斯电气股份有限公司 | A multi-module multi-connection defrosting control method, device and air conditioner |
| CN115095954B (en) * | 2022-06-30 | 2023-07-25 | 海信空调有限公司 | Air conditioner and defrosting control method thereof |
| CN115289610B (en) * | 2022-06-30 | 2023-07-25 | 海信空调有限公司 | Air conditioner and defrosting control method thereof |
| CN115031352B (en) * | 2022-06-30 | 2023-07-25 | 海信空调有限公司 | Air conditioner and defrosting control method thereof |
| CN115095955B (en) * | 2022-06-30 | 2023-07-25 | 海信空调有限公司 | Air conditioner and defrosting control method thereof |
| CN115031351B (en) * | 2022-06-30 | 2023-07-25 | 海信空调有限公司 | Air conditioner and defrosting control method thereof |
| CN115095956B (en) * | 2022-06-30 | 2023-07-25 | 海信空调有限公司 | Air conditioner and defrosting control method thereof |
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