CN111594981A - Control method and control device for cleaning air conditioner and air conditioner - Google Patents
Control method and control device for cleaning air conditioner and air conditioner Download PDFInfo
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- 238000004140 cleaning Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 86
- 230000001954 sterilising effect Effects 0.000 claims abstract description 85
- 238000010257 thawing Methods 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 230000009467 reduction Effects 0.000 claims description 11
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 238000009928 pasteurization Methods 0.000 claims 6
- 230000008569 process Effects 0.000 abstract description 18
- 239000003507 refrigerant Substances 0.000 description 25
- 230000006870 function Effects 0.000 description 20
- 230000000694 effects Effects 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- 244000005700 microbiome Species 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 238000004590 computer program Methods 0.000 description 4
- 230000001186 cumulative effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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- 230000001052 transient effect Effects 0.000 description 1
- 230000001960 triggered effect 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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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/04—Heat
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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
-
- 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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Abstract
The application relates to the technical field of intelligent household appliances, and discloses a control method for cleaning an air conditioner, which comprises the following steps: heating the surface temperature of the indoor heat exchanger to a first sterilization temperature according to a cleaning instruction of the air conditioner, and performing high-temperature sterilization; and when the surface temperature of the outdoor heat exchanger meets the defrosting condition, controlling to defrost the outdoor heat exchanger and enabling the indoor heat exchanger to exit high-temperature sterilization. When the high-temperature sterilization process is operated, whether the outdoor heat exchanger enters a defrosting mode or not can be determined in real time according to the surface temperature of the outdoor heat exchanger; when the surface temperature of the outdoor heat exchanger meets the defrosting condition, the high-temperature sterilization cleaning mode of the indoor unit is interrupted in time, the outdoor unit is defrosted, and the outdoor unit is prevented from being frozen to influence the operation of the whole unit. The application also discloses a control method for cleaning the air conditioner and the air conditioner.
Description
Technical Field
The present disclosure relates to the field of air conditioners, and in particular, to a control method and a control device for cleaning an air conditioner, and an air conditioner.
Background
At present, the cleanness and the health of the home environment are valued by more and more users, and the cleanness of the indoor environment can be greatly influenced by the cleanness degree of an air conditioner serving as common air equipment for adjusting the temperature and the humidity of the indoor environment; from long-term use experience of the air conditioner, in the process of circularly conveying indoor air by the air conditioner, dust, impurities and the like in the indoor environment enter the air conditioner along with airflow, so that more dirt is accumulated in the air conditioner after the air conditioner is used for a long time.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
when the air conditioner runs in a high-temperature sterilization cleaning mode of the indoor unit in winter in low-temperature weather, the outdoor heat exchanger is easy to frost, and when the frost layer is thick, the outdoor heat exchanger is easy to freeze, so that the overall running of the air conditioner is influenced.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a control method and a control device for cleaning an air conditioner and the air conditioner, and aims to solve the technical problem that in the related art, when an indoor unit of the air conditioner is subjected to high-temperature sterilization and cleaning in winter, a heat exchanger of an outdoor unit is frosted and frozen.
In some embodiments, a control method for air conditioner cleaning includes: heating the surface temperature of the indoor heat exchanger to a first sterilization temperature according to a cleaning instruction of the air conditioner, and performing high-temperature sterilization; and when the surface temperature of the outdoor heat exchanger meets the defrosting condition, controlling the outdoor heat exchanger to defrost, and stopping high-temperature sterilization of the indoor heat exchanger.
In some embodiments, a control device for air conditioner cleaning includes a processor and a memory storing program instructions, the processor being configured to, upon execution of the program instructions, perform a control method for air conditioner cleaning as shown in some embodiments above.
In some embodiments, the air conditioner includes the control device for air conditioner cleaning described above.
The method for cleaning the air conditioner and the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:
when the control method for cleaning the air conditioner runs the high-temperature sterilization process according to the cleaning instruction, whether the air conditioner enters the defrosting mode of the outdoor heat exchanger is determined in real time according to the surface temperature of the outdoor heat exchanger; when the surface temperature of the outdoor heat exchanger meets the defrosting condition, the high-temperature sterilization cleaning mode of the indoor unit is interrupted in time, the outdoor unit is defrosted, and the outdoor unit is prevented from being frozen to influence the operation of the whole unit.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a schematic diagram of a control method for cleaning an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a control device for cleaning an air conditioner according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of another control device for cleaning an air conditioner according to an embodiment of the disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
Referring to fig. 1, an embodiment of the present disclosure provides a control method for cleaning an air conditioner, including:
and step S01, heating the surface temperature of the indoor heat exchanger to a first sterilization temperature according to the cleaning instruction of the air conditioner, and performing high-temperature sterilization.
And step S02, when the surface temperature of the outdoor heat exchanger meets the defrosting condition, controlling to defrost the outdoor heat exchanger and enabling the indoor heat exchanger to exit high-temperature sterilization.
Here, the air conditioner is provided with a defrosting module, and the defrosting module can be used for acquiring numerical values such as the surface temperature of the outdoor heat exchanger and the outdoor environment temperature, and when the surface temperature of the outdoor heat exchanger meets a defrosting condition, it is indicated that frost with a certain thickness is condensed on the outdoor heat exchanger, and at this time, defrosting of the outdoor heat exchanger can be switched.
The control method for cleaning the air conditioner can determine whether to enter a defrosting mode of the outdoor heat exchanger or not according to the surface temperature of the outdoor heat exchanger in real time when the high-temperature sterilization process is operated; when the surface temperature of the outdoor heat exchanger meets the defrosting condition, the high-temperature sterilization cleaning mode of the indoor unit is interrupted in time, the outdoor unit is defrosted, and the outdoor unit is prevented from being frozen to influence the operation of the whole unit.
In some optional embodiments, cleaning options such as "sterilization function" or "sterilization function" are added to the remote controller and the control panel of the air conditioner, and the cleaning options can be used to trigger the operation of the method flow for cleaning the air conditioner in this embodiment; thus, after the user selects the cleaning option, the air conditioner generates a relevant cleaning instruction and responds to the execution.
In still other alternative embodiments, the air conditioner may also generate the related cleaning instruction by detecting a trigger, a timing trigger, or the like, for example, the air conditioner is additionally provided with a microorganism detection device, which may be used to detect the content of one or more specific types of microorganisms, and when the detected content of the microorganisms is higher than a set content threshold, it indicates that the air conditioner has a large number of microorganisms, and the air conditioner generates the related cleaning instruction; still alternatively, the air conditioner has a timing module, which is configured to count the cumulative operating time of the air conditioner, such as the cumulative operating time of the cooling mode or the dehumidifying mode, wherein as the cumulative operating time of the cooling mode or the dehumidifying mode of the air conditioner increases, the more condensed water is condensed inside the air conditioner and the more the number of microorganisms in the humid environment increases, so that the air conditioner may be configured to generate the related cleaning instruction when the cumulative operating time of the air conditioner exceeds the set time threshold.
In still other alternative embodiments, the air conditioner may also be triggered in linkage with the original cleaning function of the air conditioner, for example, after the original cleaning function is selected by a user, a cleaning instruction is generated and the cleaning method flow defined by the original cleaning function is executed before the cleaning flow defined by the original cleaning function is executed, or a cleaning instruction is generated and the cleaning method flow defined by the original cleaning function is executed after the cleaning flow defined by the original cleaning function is executed; that is, after the user selects an original cleaning function, the air conditioner executes two different cleaning processes in sequence, and the cleanliness of the interior of the air conditioner is effectively guaranteed through a double cleaning mode.
For example, the original cleaning function of the air conditioner is a spray cleaning function, the spray cleaning function is to spray water onto a heat exchanger of the air conditioner to clean the heat exchanger in a flowing water flushing manner, and an optional implementation manner is that the cleaning method flow of the present application is operated before the spray cleaning function is executed, that is, after the spray cleaning function is selected by a user, the cleaning method flow of the present application is controlled to kill microbes such as bacteria and the like, and then the spray cleaning function is executed, so that the flowing water can not only flush dirt such as dust, oil stains and the like, but also flush the killed microbes on the heat exchanger.
In this embodiment, when step S01 is executed, the air conditioner adjusts the flow direction of the refrigerant in the system to be consistent with the flow direction of the refrigerant in the heating mode, so that the high-temperature refrigerant discharged from the compressor first flows through the indoor heat exchanger, so as to heat the indoor heat exchanger by using the heat of the high-temperature refrigerant, and heat the surface temperature of the indoor heat exchanger to the first sterilization temperature for high-temperature sterilization.
Optionally, the first sterilization temperature is greater than or equal to 60 ℃. Under the condition that the surface of the indoor heat exchanger is at the temperature, microorganisms such as bacteria, mold and the like bred on the surface of the indoor heat exchanger are heated and die gradually, so that the effects of sterilization and disinfection are achieved. In this example, the first sterilization temperature was 65 ℃.
Optionally, in this embodiment, if the defrosting condition is not satisfied, the high-temperature sterilization process of step S01 is continuously performed.
Optionally, the defrosting conditions herein include: the surface temperature of the outdoor heat exchanger is continuously less than or equal to the condensation point temperature within a first set time.
When the indoor heat exchanger is sterilized at high temperature, the flow direction of the refrigerant in the air conditioner adjusting system is consistent with the flow direction of the refrigerant in the heating mode, so that the high-temperature refrigerant discharged by the compressor flows through the indoor heat exchanger firstly, the indoor heat exchanger is heated by utilizing the heat of the high-temperature refrigerant, the outdoor heat exchanger is in a low-temperature refrigeration state at the moment, and the frosting phenomenon possibly occurs on the surface layer. Generally, under ordinary weather conditions, when the indoor heat exchanger is subjected to high-temperature sterilization, the surface layer of the outdoor heat exchanger is not frosted much, additional defrosting operation is not needed, and the high-temperature sterilization is normally finished and the mode is resumed to enter the previous mode. However, in winter, the outdoor environment temperature is low, the outdoor heat exchanger frosts and the frost layer is thick in the indoor high-temperature sterilization process, at the moment, in order to avoid the outdoor heat exchanger from frosting too thick and even freezing, when the outdoor heat exchanger meets the defrosting condition, the indoor high-temperature sterilization needs to be suspended, and the outdoor heat exchanger is defrosted preferentially.
Specifically, the dew point temperature is determined based on the outdoor ambient temperature. Here, the outdoor ambient temperature may be acquired by a temperature sensor provided in the outdoor unit, or a mobile terminal or a cloud server communicating with the air conditioner. The condensation point temperature is used for judging the frosting condition of the surface layer of the current outdoor sensor and can be obtained through the following formula:
Tes＝C×Tao-a (1)
wherein, TesIs the dew point temperature, TaoThe outdoor ambient temperature is given as C and a are constants, respectively.
Optionally, the value of a has an association relationship with the outdoor ambient humidity. When the surface temperature of the outdoor heat exchanger is continuously less than or equal to the condensation point temperature within a first set time, controlling the outdoor heat exchanger to enter a defrosting mode; and when the surface temperature of the outdoor heat exchanger is continuously greater than or equal to the set temperature within the second set time, controlling the outdoor heat exchanger to exit defrosting. The set temperature is used herein to describe the temperature of the coil in a frost-free layer on the surface of an outdoor heat exchanger. When the outdoor heat exchanger is controlled to enter a defrosting mode, heating and defrosting of the outdoor heat exchanger can be realized through a defrosting circuit arranged on the outdoor heat exchanger; the air conditioner can also be switched by the flow direction of the refrigerant, so that the air conditioner is switched to a state that the outdoor heat exchanger works as a condenser, the outdoor heat exchanger is defrosted, the refrigerant is condensed and released when flowing through the outdoor heat exchanger, the temperature of the outdoor heat exchanger is increased, frost attached to the outdoor heat exchanger is removed, the working state that the outdoor heat exchanger is used as the condenser is kept to continue to operate after the frost attached to the outdoor heat exchanger is removed, and the temperature of the outdoor heat exchanger is continuously increased until the outdoor heat exchanger exits the defrosting mode. Optionally, for the control of the outdoor fan in the defrosting process, the outdoor heat exchanger in the defrosting process corresponding to the outdoor fan is in a heat release state, and the heat release efficiency of the outdoor heat exchanger can be influenced by the heat exchange temperature difference between the outdoor environment temperature and the outdoor heat exchanger, so that the defrosting effect of the outdoor heat exchanger is influenced. Here, the outdoor environment temperature and the outdoor fan are in a positive correlation relationship, that is, the higher the outdoor environment temperature is, the smaller the heat exchange temperature difference between the outdoor environment temperature and the outdoor heat exchanger is, and the larger the heat exchange air volume required for ensuring the heat absorption effect is. Therefore, the rotating speed of the outdoor fan is adjusted according to the outdoor environment temperature, so that the heat dissipation efficiency of the outdoor heat exchanger is enhanced, and the defrosting effect can be improved.
Optionally, when the surface temperature of the outdoor heat exchanger does not meet the defrosting condition, after the high-temperature sterilization condition is met, the temperature of the inner coil is controlled to be greater than the first set temperature and continuously runs for the first set time, and then the cleaning mode is exited. The first set temperature is a known, pre-stored temperature that can be conveniently read by the climate control module. Preferably, the first set coil temperature is higher than the coil temperature when the air conditioner is in normal heating operation. The air conditioner indoor unit can be controlled to stably run for at least first set time by adopting the first set coil temperature as the target coil temperature in a PI D control mode. The first set time is also a known, pre-stored value that can be conveniently read by the air conditioning control module. The specific value can balance the sterilization capability and the energy consumption of the air conditioner. For example, the first set time is 30mi n. And after the first set time is timed out, controlling the air conditioner to exit the cleaning mode and return to the previous mode.
Optionally, the first high-temperature sterilization parameter of the high-temperature sterilization is obtained according to the outdoor environment temperature; the first high-temperature sterilization parameter comprises a first outer machine rotating speed of the outdoor fan, a first frequency of the compressor and a first opening degree of the throttling device.
The control process of the indoor fan in the high-temperature sterilization stage is divided into a front stage and a rear stage, the indoor fan in the front stage is in a stop state, and at the moment, high-temperature refrigerant discharged by the compressor is input into the indoor heat exchanger to heat the indoor heat exchanger as soon as possible and reduce the loss of heat to the indoor environment, so that the indoor fan is controlled to be in the stop state; the indoor fan in the later stage is in a low-rotating-speed state (low-gear wind speed), the surface temperature of the indoor heat exchanger after the previous stage is close to or reaches the first sterilization temperature, and then the indoor fan is controlled to run at a low speed, so that heat can be conducted inside the indoor unit, the temperature of other parts of the indoor unit is increased, and the effect of performing high-temperature sterilization on other parts of the air conditioner is achieved.
Optionally, the front and rear stages of the indoor fan may be set to have a fixed time duration, for example, the time duration of the high-temperature sterilization stage is 35 minutes, the time duration of the front stage is set to be 5 minutes, and the time duration of the rear stage is set to be 30 minutes; therefore, the state switching of the indoor fan is controlled when the duration of each stage is counted and the duration requirement is met.
In some alternative embodiments, the switching between the first and second stages of the indoor fan may be determined based on the coil temperature.
When the air conditioner starts to execute the high-temperature sterilization stage of the step S01, detecting the temperature of the coil of the indoor heat exchanger through the temperature sensor in real time, and controlling the indoor fan to be in a shutdown state before the temperature of the coil does not reach the first sterilization temperature, wherein the indoor fan is in the shutdown state all the time in the previous stage; and after the temperature of the coil pipe reaches the first sterilization temperature, stage switching is carried out, and the indoor fan is switched to a low-rotation-speed state. Compared with the previous implementation mode of controlling according to fixed time, the two-stage state switching of the indoor fan can be realized more accurately, and the heating rate of the indoor heat exchanger and the sterilization effect of other parts of the indoor unit are guaranteed.
In still other alternative embodiments, the switching of the two stages of the indoor fan may be determined based on the initial frequency of the compressor. Here, the initial frequency of the compressor may affect the temperature of the refrigerant discharged therefrom, and thus, the temperature increase rate of the indoor heat exchanger and the time period required for switching the state of the indoor unit.
Illustratively, before the air conditioner performs the high-temperature sterilization stage of step S01, acquiring an initial frequency of the compressor, and when the initial frequency is greater than a set frequency threshold, the duration of the first stage is a first duration; and when the initial frequency is less than or equal to the set frequency threshold, the duration of the first stage is a second duration, wherein the second duration is greater than the first duration. That is, the greater the initial frequency of the compressor is, the higher the temperature of the discharged refrigerant is, and the shorter the time required for the surface temperature of the indoor heat exchanger to reach the first sterilization temperature is. Therefore, the state switching of the indoor fan is controlled according to the initial frequency of the compressor, and the effects of accurately controlling and guaranteeing the heating rate can be achieved.
In some optional embodiments, the guide plate of the indoor unit is in a closed state or a slightly opened state during the high-temperature sterilization stage, so as to reduce the heat inside the indoor unit from escaping from the air outlet to the indoor environment. Optionally, in the heating condition, the guide plate of the indoor unit can be controlled to be opened at a slightly larger angle, so that part of refrigerant heat in the high-temperature sterilization process can be continuously conveyed to the indoor environment, and the uncomfortable influence on a user caused by the reduction of the indoor environment temperature in the cleaning process is avoided.
The parameters of the high-temperature sterilization stage comprise a first high-temperature sterilization parameter obtained according to the outdoor environment temperature, wherein the first high-temperature sterilization parameter comprises the rotating speed of a first outdoor unit of the outdoor fan and the first opening degree of the throttling device.
For the control of the outdoor fan in the high-temperature sterilization stage, the outdoor heat exchanger corresponding to the outdoor fan is in a heat absorption state, and the heat absorption efficiency of the outdoor heat exchanger can be influenced by the high and low heat exchange temperature difference between the outdoor environment temperature and the outdoor heat exchanger, so that the heating and temperature rising effects of the indoor heat exchanger are influenced; here, the outdoor environment temperature and the outdoor fan are in a negative correlation relationship, that is, the lower the outdoor environment temperature is, the larger the heat exchange temperature difference between the outdoor environment temperature and the outdoor heat exchanger is, and the larger the heat exchange air volume required for ensuring the heat absorption effect is. Therefore, the rotating speed of the outdoor fan is adjusted according to the outdoor environment temperature, so that the heat absorption efficiency of the outdoor heat exchanger is enhanced, and the high-temperature sterilization effect can be improved.
Optionally, the air conditioner is preset with a first association relationship between the outdoor environment temperature and the rotation speed of the external unit, where the first association relationship includes a one-to-one correspondence relationship between the outdoor environment temperature and the rotation speed of the external unit. Therefore, the rotating speed of the outdoor unit corresponding to the current outdoor environment temperature can be obtained by searching the association relation, and the outdoor fan is controlled to operate by taking the rotating speed of the outdoor unit as the rotating speed of the first outdoor unit.
In still other alternative embodiments, the frequency of the compressor can also affect the heat absorption efficiency of the outdoor heat exchanger. Here, the higher the operating frequency of the compressor is, the greater the amount of refrigerant discharged, and therefore the greater the amount of refrigerant flowing into the outdoor heat exchanger to exchange heat. Therefore, in this embodiment, the outdoor environment temperature and the frequency of the compressor are used together to determine the temperature of the outdoor fan in the high-temperature sterilization stage, and an optional corresponding relationship between the outdoor environment temperature Tao and the frequency f of the compressor and the external machine rotation speed of the outdoor fan is shown in table 1:
TABLE 1
| Outdoor ambient temperature/frequency | f＜60Hz | 60Hz≤f≤99Hz | f＞99Hz |
| Tao＜10℃ | 3 | 5 | 7 |
| 10≤Tao≤16℃ | 2 | 4 | 5 |
| Tao＞16℃ | 2 | 2 | 2 |
In this embodiment, the rotation speed gear of the outdoor fan is set to be 7 levels, and the rotation speed is increased in sequence; in the table 1, the rotation speed gear of the outdoor fan corresponding to different outdoor environment temperature and frequency combinations is shown, and in this embodiment, the rotation speed control of the outdoor fan in the high-temperature sterilization stage can be determined by looking up the table.
In some optional embodiments, the outdoor heat exchanger is in a heat absorption state, so the outdoor heat exchanger is also in a lower temperature state, and if the outdoor environment temperature is also in a lower temperature state, the outdoor heat exchanger is prone to frost formation, for example, when the cleaning method is operated under a heating working condition in winter, the outdoor environment temperature is very low, and the outdoor heat exchanger is prone to frost condensation gradually at a high-temperature sterilization stage, so that the heat absorption efficiency of the outdoor heat exchanger from the external environment is affected. Therefore, the control of the throttling device in the high-temperature sterilization stage mainly adjusts the opening degree of the throttling device according to the temperature condition of the outdoor environment; for example, the throttling device is adjusted at a higher opening degree when the outdoor environment temperature is lower, so that the refrigerant flowing into the outdoor heat exchanger from the indoor heat exchanger can also keep a higher temperature, and the frosting speed of the outdoor heat exchanger is delayed by utilizing the heat of the residual refrigerant; and when the indoor environment is lower, the throttling device is adjusted by a lower opening degree, so that the temperature and the pressure of the throttled refrigerant are lower, and the heat exchange efficiency of the refrigerant and the external environment is improved.
Optionally, the air conditioner is preset with a first association relationship between the outdoor ambient temperature and the opening degree of the throttling device, where the first association relationship includes a one-to-one correspondence relationship between the outdoor ambient temperature and the opening degree. Therefore, the opening corresponding to the current outdoor environment temperature can be obtained by searching the incidence relation, and the throttle device is controlled to be opened by taking the opening as the first opening. Table 2 shows the correlation between the outdoor ambient temperature and the opening degree of the throttle device in an alternative embodiment.
TABLE 2
| Outdoor environment temperature | Tao≥16℃ | 5℃≤Tao＜16℃ | Tao＜5℃ |
| Opening degree in high-temperature sterilization stage | 220 | 240 | 260 |
In this embodiment, the control of the opening of the restriction device during the autoclaving stage can thus be determined by looking up the table above.
In the embodiments, the outdoor unit of the air conditioner is provided with a temperature sensor, and the temperature sensor can be used for detecting and obtaining the outdoor environment temperature for acquiring the first high-temperature sterilization parameter.
In this embodiment, the high temperature sterilization phase further includes obtaining a second high temperature sterilization parameter according to the indoor coil temperature, where the second high temperature sterilization parameter includes a frequency of the compressor.
In some alternative embodiments, one of the keys of the high temperature sterilization stage is that the indoor heat exchanger can reach and maintain the first sterilization temperature, and since the high temperature refrigerant discharged from the compressor flows to the indoor heat exchanger first, the control of the compressor in the high temperature sterilization stage is mainly determined according to the coil temperature of the indoor heat exchanger.
Optionally, when the temperature of the coil pipe of the indoor heat exchanger is lower than the first sterilization temperature, the compressor is controlled to operate at a first frequency with a larger value, so that the amount and the temperature of a high-temperature refrigerant discharged into the indoor heat exchanger are increased, and the speed of raising the temperature of the indoor heat exchanger to the first sterilization temperature is accelerated; when the temperature of the coil pipe of the indoor heat exchanger is larger than or equal to the first sterilization temperature, the compressor is controlled to operate at a second frequency with the numerical value smaller than the first frequency, the problem that the indoor heat exchanger is heated continuously to trigger high-temperature protection can be avoided under the condition that the indoor heat exchanger is maintained at the first sterilization temperature, the operation power consumption of the compressor can be reduced, and the energy-saving and environment-friendly effects are achieved.
Here, the high temperature sterilization phase further comprises obtaining a frequency reduction rate of the compressor when the surface temperature of the target heat exchanger is greater than or equal to a set safe temperature threshold value according to the indoor coil temperature, and the set safe temperature threshold value is greater than the first sterilization temperature. Here, the safe temperature threshold is a critical value of the heat exchanger within a safe temperature range, when the current temperature of the heat exchanger exceeds the safe temperature range, the operation of the air conditioner is damaged, and a fault and a fire are easily caused.
The air conditioner is preset with a second incidence relation between the indoor coil temperature and the frequency reduction rate, and the preset second incidence relation comprises a corresponding relation between the indoor coil temperature and the frequency reduction rate. In an optional embodiment, the set safety temperature threshold is divided into three threshold steps (a first threshold, a second threshold and a third threshold), and the temperature values of the three threshold steps are gradually increased; when the temperature of the indoor coil is less than or equal to a first threshold value, the current running state of the heat exchanger is normal, and the current running frequency of the compressor is kept; when the temperature of the indoor coil pipe is greater than a first threshold value and less than or equal to a second threshold value, the heat exchanger is abnormal, and the compressor performs frequency reduction at a first frequency reduction rate with a smaller value; when the temperature of the indoor coil pipe is greater than a second threshold value and less than or equal to a third threshold value, the abnormal condition of the heat exchanger is serious, and at the moment, the compressor carries out frequency reduction at a second frequency reduction rate with the value greater than the first frequency reduction rate so as to accelerate the cooling operation of the heat exchanger and the output reduction operation of heat; when the temperature of the indoor coil pipe is larger than a third threshold value, the abnormal condition of the heat exchanger is serious, the compressor is controlled to stop at the moment, and the refrigerant is stopped from being input into the heat exchanger.
In some alternative embodiments, the four-way valve switches and maintains a valve position for the refrigerant to flow in a direction consistent with the heating mode during the autoclaving stage. Optionally, in the defrosting mode, the four-way valve is controlled to switch, so that the refrigerant flows in the opposite direction.
The control method for cleaning the air conditioner can determine whether to enter a defrosting mode of the outdoor heat exchanger or not according to the surface temperature of the outdoor heat exchanger in real time when the high-temperature sterilization process is operated; when the surface temperature of the outdoor heat exchanger meets the defrosting condition, the high-temperature sterilization cleaning mode of the indoor unit is interrupted in time, the outdoor unit is defrosted, and the outdoor unit is prevented from being frozen to influence the operation of the whole unit.
The embodiment of the present disclosure provides a control device for cleaning an air conditioner, as shown in fig. 2, including a high temperature sterilization module 21, and a defrosting control module 22; the high-temperature sterilization module 21 is configured to heat the surface temperature of the indoor heat exchanger to a first sterilization temperature according to a cleaning instruction of the air conditioner, and perform high-temperature sterilization; the defrost control module 22 is configured to control defrosting of the outdoor heat exchanger and causing the indoor heat exchanger to exit high temperature sterilization when the surface temperature of the outdoor heat exchanger satisfies a defrost condition.
The embodiment of the disclosure also provides an air conditioner, which comprises the control device for cleaning the air conditioner.
By adopting the air conditioner provided by the embodiment of the disclosure, when cleaning operation is executed according to an instruction, high-temperature sterilization operation of the indoor heat exchanger is operated, and whether the outdoor heat exchanger enters a defrosting mode is determined according to the surface temperature of the outdoor heat exchanger in real time; when the surface temperature of the outdoor heat exchanger meets the defrosting condition, the high-temperature sterilization cleaning mode of the indoor unit is interrupted in time, the outdoor unit is defrosted, and the outdoor unit is prevented from being frozen to influence the operation of the whole unit.
As shown in fig. 3, an embodiment of the present disclosure provides a control device for cleaning an air conditioner, including a processor (processor)100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface)102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via a bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to perform the control method for air conditioner cleaning of the above-described embodiment.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, that is, implements the control method for air conditioner cleaning in the above-described embodiments.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides an air conditioner, which comprises the control device for cleaning the air conditioner.
The disclosed embodiments provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described control method for air conditioner cleaning.
The disclosed embodiments provide a computer program product comprising a computer program stored on a computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the above-described control method for air conditioner cleaning.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A control method for cleaning an air conditioner, comprising:
heating the surface temperature of the indoor heat exchanger to a first sterilization temperature according to a cleaning instruction of the air conditioner, and performing high-temperature sterilization;
and when the surface temperature of the outdoor heat exchanger meets the defrosting condition, controlling to defrost the outdoor heat exchanger and enabling the indoor heat exchanger to exit high-temperature sterilization.
2. The method of claim 1, wherein the defrost condition comprises:
the surface temperature of the outdoor heat exchanger is continuously less than or equal to the condensation point temperature within a first set time.
3. The method of claim 2, wherein the dew point temperature is determined from an outdoor ambient temperature.
4. The method of claim 1, further comprising:
and when the surface temperature of the outdoor heat exchanger is continuously greater than or equal to the set temperature within the second set time, controlling the outdoor heat exchanger to exit defrosting.
5. The method of claim 1, further comprising:
and when the surface temperature of the outdoor heat exchanger does not meet the defrosting condition, after the high-temperature sterilization condition is met, controlling the temperature of the inner coil to be greater than a first set temperature and continuously operating for a first set time, and then exiting the cleaning mode.
6. The method according to claim 1, wherein the first pasteurization parameters of the pasteurization are obtained from the outdoor ambient temperature;
the first high-temperature sterilization parameter comprises a first outer machine rotating speed of an outdoor fan, a first frequency of a compressor and a first opening degree of a throttling device.
7. The method of claim 6, wherein obtaining a first pasteurization parameter for the pasteurization based on the outdoor ambient temperature comprises:
acquiring corresponding high-temperature sterilization parameters from a preset first incidence relation according to the outdoor environment temperature; the preset first incidence relation comprises a corresponding relation between outdoor environment temperature and the rotating speed or the opening degree of the outdoor unit.
8. The method of any one of claims 1 to 7, wherein the second pasteurization parameter for pasteurization is obtained from an indoor coil temperature;
wherein the second high temperature sterilization parameter comprises a rate of frequency reduction of the compressor when a surface temperature of a target heat exchanger is greater than or equal to a set safe temperature threshold, the set safe temperature threshold being greater than the first sterilization temperature.
9. A control device for air conditioner cleaning, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the control method for air conditioner cleaning according to any one of claims 1 to 8 when executing the program instructions.
10. An air conditioner characterized by comprising the control device for air conditioner cleaning according to claim 9.
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Application publication date: 20200828 |