CN110822618A - Self-cleaning control method for air conditioner - Google Patents
Self-cleaning control method for air conditioner Download PDFInfo
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- CN110822618A CN110822618A CN201810920663.3A CN201810920663A CN110822618A CN 110822618 A CN110822618 A CN 110822618A CN 201810920663 A CN201810920663 A CN 201810920663A CN 110822618 A CN110822618 A CN 110822618A
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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
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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
- F24F11/67—Switching between heating and cooling modes
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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
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/22—Cleaning ducts or apparatus
Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to a self-cleaning control method for an air conditioner. In the technical scheme of the invention, the air conditioner comprises a pulse vibration device arranged on an outdoor heat exchanger, and an indoor heat exchanger, an outdoor heat exchanger, a compressor, an electronic expansion valve and a four-way valve which can form a closed-loop refrigerant circulating system, wherein the self-cleaning control method comprises the following steps: under the heating condition, the electronic expansion valve is closed firstly, and the electromagnetic valve at the low-pressure side of the compressor is closed after the preset time; starting a pulse vibration device to crush dirt inside the outdoor heat exchanger; and opening the electronic expansion valve to a preset opening degree, and opening the electromagnetic valve to increase the frequency of the compressor, so that the refrigerant is utilized to flush the crushed dirt in the outdoor heat exchanger. The invention can strongly clean the interior of the outdoor heat exchanger by using a mode of firstly vibrating and then washing, so that the sticky dirt in the interior of the outdoor heat exchanger can be quickly and thoroughly removed, and the cleaning efficiency and the cleaning effect of the outdoor heat exchanger are ensured.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a self-cleaning control method for an air conditioner.
Background
Generally, the refrigerant circulating system of an air conditioner mainly includes a refrigerant and a refrigerating machine oil. After the air conditioner runs for a long time, residual liquid of the refrigerating machine oil, dust and impurities entering the air conditioner are easily adhered to the inner wall of the heat exchanger of the air conditioner, heat exchange between a refrigerant in the heat exchanger and outside air is influenced, heat exchange efficiency is reduced, and the inner wall of the heat exchanger is possibly abraded by the impurities when the refrigerant flows.
At present, except for a manual cleaning method, the self-cleaning mode of the air conditioner is as follows: the dirt on the position to be cleaned of the air conditioner is firstly condensed, specifically, the dirt can be condensed by means of defrosting on the position to be cleaned or spraying dry ice on the position to be cleaned, and then the dirt is peeled off from the position to be cleaned through means of defrosting or sublimation of the dry ice, so that the cleaning purpose is achieved. The disadvantages of the above cleaning methods are: the method is not suitable for cleaning the inner wall of the heat exchanger, and the cleaning mode has an unsatisfactory peeling effect on dirt with strong adhesive force, and dirt may remain after the air conditioner is cleaned.
Accordingly, there is a need in the art for a new self-cleaning control method for an air conditioner to solve the above-mentioned problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the self-cleaning control method of the existing air conditioner is not well suitable for cleaning the inner wall of the heat exchanger and is difficult to completely strip the stubborn dirt in the air conditioner, the invention provides a self-cleaning control method for the air conditioner, the air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger, a compressor, an electronic expansion valve and a four-way valve, the indoor heat exchanger, the electronic expansion valve, the outdoor heat exchanger, the compressor and the four-way valve form a closed-loop refrigerant circulation system, the air conditioner further comprises a pulse vibration device arranged on the outdoor heat exchanger, and the self-cleaning control method comprises the following steps: under the heating condition, the electronic expansion valve is closed, and the electromagnetic valve at the low-pressure side of the compressor is closed after the preset time; turning on the pulse vibration device to crush dirt inside the outdoor heat exchanger; and opening the electronic expansion valve to a preset opening degree, and opening the electromagnetic valve to enable the compressor to increase the frequency, so that the crushed dirt in the outdoor heat exchanger is flushed by the refrigerant.
In a preferred technical solution of the above self-cleaning control method for an air conditioner, the preset opening degree is a maximum opening degree of the electronic expansion valve.
In a preferred embodiment of the above self-cleaning control method for an air conditioner, the step of "raising the frequency of the compressor" specifically includes: gradually increasing the frequency of the compressor to a maximum frequency.
In a preferred embodiment of the above self-cleaning control method for an air conditioner, the step of "opening the electronic expansion valve to a preset opening degree", the step of "opening the solenoid valve", and the step of "raising the frequency of the compressor" are performed simultaneously.
In the above preferred embodiment of the self-cleaning control method for an air conditioner, the self-cleaning control method further includes, while "closing the solenoid valve on the low-pressure side of the compressor": the compressor is stopped.
In a preferred embodiment of the above self-cleaning control method for an air conditioner, the self-cleaning control method further includes, while "opening the electronic expansion valve to a preset opening degree": and turning off the pulse vibration device.
In a preferred embodiment of the above self-cleaning control method for an air conditioner, the self-cleaning control method further includes, while "opening the electronic expansion valve to a preset opening degree": the rotating speed of an indoor fan of the air conditioner is increased.
In a preferred embodiment of the above self-cleaning control method for an air conditioner, the step of "increasing the rotation speed of the indoor fan of the air conditioner" includes: and gradually increasing the rotating speed of an outdoor fan of the air conditioner to the maximum rotating speed.
In the above preferred embodiment of the self-cleaning control method for an air conditioner, the self-cleaning method further includes, while "closing the solenoid valve on the low-pressure side of the compressor": and stopping the operation of the indoor fan of the air conditioner.
The invention also provides an air conditioner, which comprises a control unit, wherein the control unit is used for executing any self-cleaning control method for the air conditioner.
As will be understood by those skilled in the art, in the technical solution of the present invention, under normal heating conditions, the refrigerant circulates along the path of the outdoor heat exchanger-the solenoid valve on the low pressure side of the compressor-the indoor heat exchanger-the electronic expansion valve. At the moment, the electronic expansion valve is closed firstly, the electromagnetic valve at the low-pressure side of the compressor is closed after the preset time, so that the refrigerant can be completely recycled to the indoor side of the air conditioner, the refrigerant at the position of the outdoor heat exchanger is emptied, the interference of the refrigerant in the outdoor heat exchanger on the cleaning work of the outdoor heat exchanger is avoided, and the preparation is made for cleaning the outdoor heat exchanger. Then, a vibration stress is applied to the outdoor heat exchanger by starting the pulse vibration device, so that dirt such as greasy dirt patch, impurities and the like adhered to the outdoor heat exchanger is vibrated to be broken or vibrated to fall. And finally, opening the electronic expansion valve and the electromagnetic valve and increasing the frequency of the compressor, so that the refrigerant on the indoor side can flow to the outdoor side, and the crushed dirt in the outdoor heat exchanger is washed by the flowing of the refrigerant, and the crushed or vibrated dirt in the outdoor heat exchanger is washed and taken out of the outdoor heat exchanger. Compared with the existing cleaning mode of condensation and peeling, the vibration mode can separate stubborn impurities adhered to the inner wall of the outdoor heat exchanger from the inner wall more easily, and particularly when the inside of the heat exchanger is washed and cleaned, part of loosened dirt which is not vibrated down is further washed by using impact force acting on the inner wall of the outdoor heat exchanger when a refrigerant flows, so that the dirt remained in the inside of the outdoor heat exchanger and adhered to the inner wall of the outdoor heat exchanger can be thoroughly removed, and a good cleaning effect is ensured.
In a preferred embodiment, the electronic expansion valve is opened to the maximum opening degree, so that a large amount of refrigerant can flow into the outdoor heat exchanger from the indoor side, the inner wall of the outdoor heat exchanger can be flushed and cleaned by the refrigerant in the process of flowing through the outdoor heat exchanger, the stubborn dirt can be flushed, the process of flushing the dirt is accelerated, and the overall cleaning efficiency and the cleaning effect are ensured.
In a preferred embodiment, the frequency of the compressor is gradually increased to the highest frequency, that is, when the refrigerant flows to the outdoor side to flush the outdoor heat exchanger, the compressor is operated at the highest frequency, so as to increase the refrigerant discharge capacity of the compressor per unit time, thereby further increasing the flow rate of the refrigerant, and improving the impact force of the refrigerant on the inner wall of the outdoor heat exchanger.
Drawings
Fig. 1 is a schematic structural view of an air conditioner of the present invention;
fig. 2 is a flowchart of a self-cleaning control method of an air conditioner of the present invention;
fig. 3 is a logic control diagram of an embodiment of a self-cleaning control method of an air conditioner of the present invention.
Detailed Description
It should be noted that although the steps of the control method of the present invention are described in a particular order in the present application, the order is not limiting and those skilled in the art can perform the steps in a different order without departing from the basic principles of the present invention.
It should be noted that the terms "first" and "second" in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Based on the problems that the prior self-cleaning control method of the air conditioner pointed out by the background technology cannot be well suitable for cleaning the inner wall of the heat exchanger and is difficult to completely strip stubborn dirt in the air conditioner, the invention provides the self-cleaning control method for the air conditioner, and aims to quickly and completely clean the dirt in the outdoor heat exchanger and ensure the cleaning effect in the outdoor heat exchanger.
Referring first to fig. 1, fig. 1 is a schematic structural view of an air conditioner according to the present invention. As shown in fig. 1, the air conditioner of the present invention includes an indoor heat exchanger 1, an outdoor heat exchanger 2, a compressor 3, an electronic expansion valve 4, and a four-way valve 5, wherein the indoor heat exchanger 1, the electronic expansion valve 4, the outdoor heat exchanger 2, the compressor 3, and the four-way valve 5 form a closed-loop refrigerant circulation system, the four-way valve 5 is configured to change an operation condition of the air conditioner by reversing, that is, the air conditioner can be changed from a reversing condition to a heating condition by the four-way valve 5 under a cooling condition, and the air conditioner can be changed from a reversing condition to a cooling. A first solenoid valve 31 is provided on a low pressure side of the compressor 3, and a second solenoid valve 32 is provided on a high pressure side of the compressor 3, so as to control on/off of a refrigerant suction path and a refrigerant discharge path of the compressor 3. The air conditioner of the invention also comprises a pulse vibration device 6 arranged on the outdoor heat exchanger 2, and the pulse vibrator 6 can apply vibration stress on the outdoor heat exchanger 2 so as to shake off and loosen dirt on the inner wall of the outdoor heat exchanger 2 and shake up the agglomerated dirt in the outdoor heat exchanger 2.
Referring next to fig. 2 with continued reference to fig. 1, fig. 2 is a flowchart of a self-cleaning control method of an air conditioner according to the present invention. As shown in fig. 1 and 2, the self-cleaning control method of the present invention includes the following main steps:
s1: under the heating condition, the electronic expansion valve 4 is closed firstly, and the first electromagnetic valve 31 at the low-pressure side of the compressor 3 is closed after the preset time;
s2: the pulse vibration device 6 is started to crush dirt inside the outdoor heat exchanger 2;
s3: the electronic expansion valve 4 is opened to a preset opening degree, the first electromagnetic valve 31 is opened, and the compressor 3 is increased in frequency, so that the refrigerant is used for flushing crushed dirt in the outdoor heat exchanger 2.
In step S1, as shown in fig. 1, in the heating condition, the refrigerant flows in the clockwise direction indicated by the arrow in fig. 1. After the electronic expansion valve 4 is closed, the refrigerant gradually flows in a clockwise direction and is collected to the indoor side of the air conditioner, and the closed electronic expansion valve 4 can prevent the refrigerant flowing to the indoor side from flowing to the outdoor side of the air conditioner, so that the refrigerant is gradually recovered to the indoor side. After all the refrigerants flow to the indoor side uniformly, namely the preset time is reached and the refrigerant recovery is finished, the first electromagnetic valve 31 is closed, so that the refrigerants are separated from the front side and the rear side of the flowing direction to the indoor side of the air conditioner, and the outdoor heat exchanger 2 on the outdoor side is prevented from being influenced by the flowing of the refrigerants. As an example, the preset time may be 30 seconds, that is, 30 seconds after the electronic expansion valve 4 is closed, the first electromagnetic valve 31 is closed, so as to ensure that all the refrigerant is recovered to the indoor side of the air conditioner. It should be noted that the preset time may be any time other than 30 seconds, and those skilled in the art may reasonably set the preset time in practical applications in combination with the operating parameters of the air conditioner, as long as the boundary point determined by the preset time can ensure that all the refrigerant is recovered to the indoor side of the air conditioner.
In step S2, after the pulse vibration device 6 is turned on, a vibration stress can be applied to the inner wall of the outdoor heat exchanger 2, so as to shake loose or shake down dirt such as oil spots and impurities stuck on the inner wall of the outdoor heat exchanger 2, and shake up large dirt stuck in the outdoor heat exchanger 2, so as to prevent the dirt from sticking and sticking in the outdoor heat exchanger 2.
In step S3, when the electronic expansion valve 4 is opened to the preset opening degree and the first solenoid valve 31 is opened, the refrigerant can start to circulate again, and the refrigerant flows from the indoor side to the outdoor side, and flushes the interior of the outdoor heat exchanger 2 while passing through the outdoor heat exchanger 2. After the frequency of the compressor 3 is raised, the discharge amount of the refrigerant of the compressor 3 in unit time is increased, so that the amount of the refrigerant flowing into the outdoor heat exchanger 2 is increased, the outdoor heat exchanger 2 is flushed by the large-flow refrigerant, and the loosened dirt is washed away and is taken out of the outdoor heat exchanger 2 along with the flow of the refrigerant together with the broken and shaken dirt.
In a preferred embodiment, the preset opening degree is a maximum opening degree of the electronic expansion valve 4. When the self-cleaning process of the outdoor heat exchanger 2 enters the flushing stage, the electronic expansion valve 4 is opened to the maximum opening degree to allow the refrigerant to circularly flow, so that a large amount of refrigerant can flow to the outdoor side through the electronic expansion valve 4, and the refrigerant can generate a large enough impact force on the interior of the outdoor heat exchanger 2 when flowing. Of course, the "large amount" of refrigerant means that the flow rate of the refrigerant is greater than that of the refrigerant in the normal heating condition, so that the refrigerant can have a good flushing effect in the outdoor heat exchanger 2 when flowing.
As another preferred embodiment, the step S3 of "frequency up-converting the compressor 3" specifically includes: the frequency of the compressor 3 is gradually increased to the highest frequency. That is, when the self-cleaning process of the outdoor heat exchanger 2 enters the flushing stage, the compressor 3 is rapidly raised to the maximum frequency in a short time, so that the displacement of the compressor 3 (i.e. the amount of the discharged high-pressure gaseous refrigerant) in unit time is maximized, thereby further ensuring the impact effect of the large-flow refrigerant on the inside of the outdoor heat exchanger 2. The gradual increase of the frequency of the compressor 3 may be to increase the frequency of the compressor 3 in a linear relationship, or to increase the frequency of the compressor 3 in a non-linear relationship, and those skilled in the art may flexibly set the frequency increasing manner of the compressor 3 in practical applications, as long as the frequency of the compressor 3 is increased to the highest frequency, and then a large amount of refrigerant circulates along the flow path to strongly flush the inside of the outdoor heat exchanger 2.
Further, the three sub-steps of "opening the electronic expansion valve 4 to the preset opening degree", "opening the first electromagnetic valve 31", and "up-converting the compressor 3" in step S3 are performed simultaneously, that is, when the washing process of the outdoor heat exchanger 2 enters the flushing stage, the electronic expansion valve 4 (opened at the maximum opening degree) and the first solenoid valve 31 are opened to circulate the flow path of the refrigerant, and the compressor 3 is simultaneously raised to the maximum frequency, so that the flow rate of the refrigerant in the flow path is maximized in a short time, thereby guarantee that the refrigerant can carry out the washing of strikeing by brute force to the inside of outdoor heat exchanger 2, both make drop and kibbling dirt in the outdoor heat exchanger 2 can be along with the flow of refrigerant by quick clean up again can wash away the dirt that is shaken loose but not drop from 2 inner walls of outdoor heat exchanger, promoted cleaning efficiency and guaranteed clean effect.
Further, while "closing the first solenoid valve 31 on the low pressure side of the compressor 3", the self-cleaning control method of the present invention further includes: the compressor 3 is stopped. That is, when the refrigerant is completely recovered and the flow path thereof is cut off from the front and rear sides in the flow direction, since the refrigerant does not need to flow circularly in the following vibration and dirt breaking stage, the compressor 3 is stopped to reduce the energy consumption of the air conditioner, and the pressure of the refrigerant to the electronic expansion valve 4 is reduced by stopping the exhaust of the compressor 3, thereby preventing the electronic expansion valve 4 from being unnecessarily worn.
Still further, while "opening the electronic expansion valve 4 to a preset opening degree", the self-cleaning control method of the present invention further includes: the pulse vibrating device 6 is switched off. The outdoor heat exchanger 2 enters a flushing stage while the electronic expansion valve 4 is opened to flow the refrigerant. Under this situation, because the refrigerant can play certain cushioning effect to the vibration of outdoor heat exchanger 2 after getting into outdoor heat exchanger 2, be unfavorable for vibrating garrulous or erode the dirt, consequently the dirt in outdoor heat exchanger 2 is by whole garrulous backs that vibrate basically, closes pulse vibration device 6, has avoided the waste of electric energy on the one hand, and on the other hand can avoid the impact force of vibration stress and refrigerant to influence each other again and reduce clean effect. Specifically, after the pulse vibrator 6 is turned on, the pulse vibrator 6 may be operated for a certain period of time to crush the dirt in the outdoor heat exchanger 2, and the pulse vibrator 6 may be turned off while the refrigerant is circulated again to finish the vibration-crushing process.
Still further, while "opening the electronic expansion valve 4 to a preset opening degree", the self-cleaning control method of the present invention further includes: the rotation speed of the indoor fan 11 at the position of the indoor heat exchanger 1 of the air conditioner is increased. Through promoting indoor fan 11's rotational speed for indoor heat exchanger 1's heat exchange efficiency obtains promoting, thereby accelerated the condensation efficiency of the refrigerant in indoor heat exchanger 1, thereby further make a large amount of refrigerants can flow in the pipeline, guaranteed the refrigerant to outdoor heat exchanger 2's impact effect. As a preferred embodiment, the step of "increasing the rotation speed of the indoor fan 11 of the air conditioner" specifically includes: the rotation speed of the indoor fan 11 of the air conditioner is gradually increased to the maximum rotation speed. In the process of the refrigerant circulating flow, the indoor fan 11 operates at the maximum rotation speed, so that the heat exchange between the indoor heat exchanger 1 and the external environment is completed quickly and efficiently, and the condensation process of the refrigerant is promoted. The gradually increasing of the rotation speed of the indoor fan 11 to the maximum rotation speed may be to increase the rotation speed of the indoor fan 11 in a linear relationship, or to increase the rotation speed of the indoor fan 11 in a nonlinear relationship, and those skilled in the art may flexibly set the rotation speed increasing manner of the indoor fan 11 in practical application, as long as the rotation speed of the indoor fan 11 is increased to the maximum rotation speed, so as to promote the rapid condensation of the refrigerant in the indoor heat exchanger 1.
As a preferred embodiment, while "closing the first electromagnetic valve 31", the self-cleaning method of the present invention further includes: the indoor fan 11 of the air conditioner is stopped. After closing first solenoid valve 31, the air conditioner does not heat, and in this process, indoor fan 11 shut down can avoid the air conditioner to supply air to indoor when not heating to avoid reducing user experience. Because the whole self-cleaning process of the air conditioner is short in time, after the air conditioner stops heating for a short time, the indoor fan 11 can continuously convey hot air to the indoor space when the air conditioner recovers heating. That is, the indoor fan 11 avoids increasing the heating defect of the air conditioner when the outdoor heat exchanger 2 of the air conditioner performs self-cleaning by stopping the operation.
Referring to fig. 3 and continuing to refer to fig. 1, the most preferred technical solution of the present invention is described, and fig. 3 is a logic control diagram of an embodiment of a self-cleaning control method of an air conditioner of the present invention. As shown in fig. 1 and 3, in particular, the complete self-cleaning process is as follows:
under the condition that the air conditioner is in the heating working condition, the outdoor fan 21 rotates at the normal working speed raoIn operation, the indoor fan 11 operates at the normal operating speed rnThe compressor 3 is operated at the normal working frequency f, the electronic expansion valve 4 is in an opening state, and the opening degree is b 1;
when the air conditioner receives the self-cleaning command (i.e., point a in fig. 3) from the outdoor heat exchanger 2, the electronic expansion valve 4 is closed to start recovering the refrigerant. At the same time, the compressor is ramped from frequency f to frequency f1To accelerate the recovery process of the refrigerant. The outdoor fan 21 rotates at a speed lower than the operating speed raoTo reduce energy consumption while ensuring the flow of the refrigerant outside the chamber. The indoor fan 11 still operates at the normal operating speed rnThe operation ensures the rapid recovery of the refrigerant. The lapse of a preset time (as shown in fig. 3)30 seconds), the refrigerant flows and gathers to the indoor side, at t1The first solenoid valve 31 is closed within a time to completely cut off the flow path of the refrigerant, and the entire recovery process of the refrigerant is completed. Wherein the frequency of the compressor 3 is from f while the first electromagnetic valve 31 is closed1Gradually decreasing to a stop. The rotation speed of the outdoor fan 21 is gradually reduced to zero. The rotating speed of the indoor fan 11 is gradually reduced to zero;
then, the pulse vibration device 6 is turned on to crush the dirt inside the outdoor heat exchanger 2, and the pulse vibration device 6 is operated for a certain period of time to crush and shake down the dirt inside the outdoor heat exchanger 2, and the operation time of the pulse vibration device 6 may be 3 to 5 minutes, as an example. The specific operation time can be set according to the actual cleaning requirement. In this process, the indoor fan 11, the outdoor fan 21 and the compressor 3 are always in a stop state, and the electronic expansion valve 4 and the first electromagnetic valve 31 are always in a closed state;
finally, after the vibration and dirt breaking process is finished, the pulse vibration device 6 is closed, the electronic expansion valve 4 is opened to the maximum opening degree B, the first electromagnetic valve 31 is opened, the compressor 3, the indoor fan 11 and the outdoor fan 21 are opened, and the frequency and the rotating speed of the compressor 3, the indoor fan 11 and the outdoor fan 21 are respectively increased to fmax、rn-maxAnd rao-maxThe refrigerant of a large flow rate is circulated again to flow through the exterior heat exchanger 21 and flush the exterior heat exchanger 21, and dirt in the exterior heat exchanger 21 can flow out of the exterior heat exchanger 21 along with the circulation flow of the refrigerant. A filtering device is disposed on the outdoor heat exchanger 21 or the compressor 3 or between the outdoor heat exchanger 11 and the compressor 3, so that the filtering device can filter and collect dirt and impurities in the refrigerant. As an example, the filtering device may be a dust collecting ring disposed at the bottom of the compressor 3. The filtering and collecting mode of the dirt is not limited, and the specific filtering scheme can be set according to the actual flow pipeline of the air conditioner as long as the dirt in the refrigerant can be collected and the normal operation of the air conditioner is not affected. The time length of the washing process can be 2-3 minutes, and the actual washing time length can be adjusted according to the cleaning requirement;
after the rinsing is finished, at t2Adjusting the opening degree of the electronic expansion valve from B to B within the time1The frequency of the compressor 3 is set from fmaxDecreasing to f, the rotating speeds of the indoor fan 11 and the outdoor fan 21 are decreased from rao-maxAnd rn-maxAre respectively adjusted to raoAnd rnAnd the air conditioner can recover the heating working condition before self-cleaning.
In the above embodiment, since the raising and lowering of the frequencies and the rotational speeds of the compressor 3, the outdoor fan 21, and the indoor fan 11 are not instantaneously completed, it takes time t to complete the raising and lowering operation1And t2The time consumed for the actual lifting of the compressor 3, the outdoor fan 21, and the indoor fan 11 is taken as a criterion. And because the lifting action takes a short time, the partial steps can be approximately regarded as being performed simultaneously. For example, if the three steps of "opening the electronic expansion valve 4 to the preset opening degree", "opening the first solenoid valve 31", and "raising the frequency of the compressor 3" are performed simultaneously, the three steps are considered to be performed simultaneously although the end times of the three steps after the simultaneous start of execution are slightly different. The above time difference does not affect the actual operation of the self-cleaning method of the present invention.
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 technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously 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. A self-cleaning control method for an air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger, a compressor, an electronic expansion valve and a four-way valve, wherein the indoor heat exchanger, the electronic expansion valve, the outdoor heat exchanger, the compressor and the four-way valve form a closed-loop refrigerant circulating system,
the air conditioner is characterized by further comprising a pulse vibration device arranged on the outdoor heat exchanger, and the self-cleaning control method comprises the following steps:
under the heating condition, the electronic expansion valve is closed, and the electromagnetic valve at the low-pressure side of the compressor is closed after the preset time;
turning on the pulse vibration device to crush dirt inside the outdoor heat exchanger;
and opening the electronic expansion valve to a preset opening degree, and opening the electromagnetic valve to enable the compressor to increase the frequency, so that the crushed dirt in the outdoor heat exchanger is flushed by the refrigerant.
2. The self-cleaning control method of claim 1, wherein the preset opening degree is a maximum opening degree of the electronic expansion valve.
3. The self-cleaning control method of claim 1, wherein the step of "upshifting the compressor" specifically comprises:
gradually increasing the frequency of the compressor to a maximum frequency.
4. The self-cleaning control method of claim 1, wherein the steps of "opening the electronic expansion valve to a preset opening degree", "opening the solenoid valve", and "ramping up the compressor" are performed simultaneously.
5. The self-cleaning control method according to claim 1, wherein, while "closing a solenoid valve at a low pressure side of the compressor", the self-cleaning control method further comprises:
the compressor is stopped.
6. The self-cleaning control method according to claim 1, wherein, while "opening the electronic expansion valve to a preset opening degree", the self-cleaning control method further comprises:
and turning off the pulse vibration device.
7. The self-cleaning control method according to any one of claims 1 to 6, wherein, while "opening the electronic expansion valve to a preset opening degree", the self-cleaning control method further comprises:
the rotating speed of an indoor fan of the air conditioner is increased.
8. The self-cleaning control method according to claim 7, wherein the step of "increasing the rotation speed of the indoor fan of the air conditioner" specifically comprises:
and gradually increasing the rotating speed of an indoor fan of the air conditioner to the maximum rotating speed.
9. The self-cleaning control method according to any one of claims 1 to 6, wherein, while "closing a solenoid valve on a low pressure side of the compressor", the self-cleaning method further comprises:
and stopping the operation of the indoor fan of the air conditioner.
10. An air conditioner characterized by comprising a control unit for executing the self-cleaning control method for an air conditioner according to any one of claims 1 to 9.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023279617A1 (en) * | 2021-07-09 | 2023-01-12 | 青岛海尔空调器有限总公司 | Control method for implementing self-cleaning function in coiled pipe of outdoor heat exchanger |
| WO2023284197A1 (en) * | 2021-07-15 | 2023-01-19 | 青岛海尔空调器有限总公司 | In-pipe self-cleaning control method for outdoor heat exchanger |
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| WO2023284197A1 (en) * | 2021-07-15 | 2023-01-19 | 青岛海尔空调器有限总公司 | In-pipe self-cleaning control method for outdoor heat exchanger |
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