CN112710063B - Self-cleaning control method of air conditioner and air conditioner - Google Patents
Self-cleaning control method of air conditioner and air conditioner Download PDFInfo
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- CN112710063B CN112710063B CN202110064078.XA CN202110064078A CN112710063B CN 112710063 B CN112710063 B CN 112710063B CN 202110064078 A CN202110064078 A CN 202110064078A CN 112710063 B CN112710063 B CN 112710063B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G15/003—Control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
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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
- F24F2221/225—Cleaning ducts or apparatus using a liquid
Abstract
The invention belongs to the technical field of air conditioners, and particularly provides a self-cleaning control method of an air conditioner and the air conditioner. The invention aims to solve the problem that the prior air conditioner can not deeply clean oil stains. To this end, the self-cleaning control method of the present invention specifically includes: detecting whether oil stains exist on the surface of the heat exchanger or not; when oil stains exist on the surface of the heat exchanger, detecting the ash deposition amount on the surface of the heat exchanger; comparing the ash deposition amount with a first preset ash deposition amount; and controlling the air conditioner to independently execute the degreasing mode or execute the degreasing mode after executing the dust removing mode according to the dust accumulation amount and the first preset dust accumulation amount. The invention abandons the prior proposal of selectively controlling the air conditioner to carry out the degreasing mode or the dust removing mode according to the oil stain amount, but once the oil stain is found, the cleaning mode is bound to have the degreasing mode, so that the oil stain can not be remained again, thereby ensuring that the oil stain and the dust amount can not be accumulated quickly and reducing the self-cleaning times.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly provides a self-cleaning control method of an air conditioner and the air conditioner.
Background
In the use process of the air conditioner, due to different environments, the polluted dirt is different. Taking an air conditioner in a kitchen or a restaurant as an example, because oil smoke exists in the environment, after the air conditioner is used for a long time, an indoor unit or an outdoor unit is inevitably contaminated by oil dirt and dust, however, compared with the air conditioner which is contaminated by dust alone, the air conditioner contaminated by oil dirt is more difficult to clean, and the conventional dust removal mode cannot eradicate the oil dirt.
Accordingly, there is a need in the art for a new self-cleaning control method for an air conditioner and an air conditioner to solve the problem that the existing air conditioner cannot deeply clean the oil stains.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the existing air conditioner cannot deeply clean the oil stains, the invention provides a self-cleaning control method of an air conditioner, comprising:
detecting whether oil stains exist on the surface of the heat exchanger or not;
when oil stains exist on the surface of the heat exchanger, detecting the ash deposition amount on the surface of the heat exchanger;
comparing the ash deposition amount with a first preset ash deposition amount;
and controlling the air conditioner to independently execute a degreasing mode or execute the degreasing mode after executing the dust removing mode according to the dust deposition amount and the first preset dust deposition amount.
In a preferred technical solution of the above control method, the step of controlling the air conditioner to independently execute the degreasing mode or execute the degreasing mode after executing the soot removing mode according to the soot deposition amount and a first preset soot deposition amount specifically includes:
when the ash deposition amount is larger than or equal to a first preset ash deposition amount, controlling the air conditioner to execute an ash deposition removing mode and then execute a degreasing mode;
and when the ash deposition amount is less than a first preset ash deposition amount, controlling the air conditioner to independently execute an oil stain removal mode.
In a preferred technical solution of the above control method, after the step of "detecting whether there is oil stain on the surface of the heat exchanger", the control method further includes:
when oil stains do not exist on the surface of the heat exchanger, detecting the ash deposition amount on the surface of the heat exchanger;
comparing the ash deposition amount with a second preset ash deposition amount;
when the ash deposition amount is larger than or equal to a second preset ash deposition amount, independently executing an ash deposition removing mode;
when the ash deposition amount is less than a second preset ash deposition amount, self-cleaning is not executed;
wherein the second predetermined amount of soot is larger than the first predetermined amount of soot.
In the preferred technical scheme of the control method, the step of executing the soot removal mode first and then executing the degreasing mode specifically comprises the following steps:
controlling the temperature of the heat exchanger to be less than or equal to the frost point temperature so as to frost the surface of the heat exchanger;
when the frosting thickness reaches a set value, controlling the temperature of the heat exchanger to be increased so as to defrost the surface of the heat exchanger;
when the defrosting degree is just completely melted, spraying a cleaning agent on the surface of the heat exchanger;
controlling the temperature of the heat exchanger to be less than or equal to a second dew point temperature to condense the surface of the heat exchanger;
controlling the temperature of the heat exchanger to rise so that the surface of the heat exchanger is dried again.
In a preferred technical scheme of the above control method, the step of "spraying a cleaning agent to the surface of the heat exchanger when the defrosting degree is just completely melted" specifically includes:
when the defrosting degree just reaches the complete melting, the oil stain amount is detected again;
judging the oil stain amount and the preset oil stain amount;
when the oil stain amount is larger than or equal to the preset oil stain amount, controlling the temperature of the heat exchanger to be smaller than or equal to the first dew point temperature so as to condense the surface of the heat exchanger;
spraying cleaning agent to the surface of the heat exchanger;
wherein the first dew point temperature is less than the second dew point temperature.
In a preferred embodiment of the above control method, after the step of "determining the oil contamination amount and the preset oil contamination amount", the control method further includes:
and when the oil stain amount is less than the preset oil stain amount, directly spraying a cleaning agent to the surface of the heat exchanger.
In a preferred embodiment of the above control method, after the step of "spraying a cleaning agent on the surface of the heat exchanger", the control method further includes:
and controlling the temperature of the heat exchanger to rise to the optimal working temperature of the cleaning agent, and maintaining for a set time.
In a preferred embodiment of the above control method, the frost point temperature = conventional frost point temperature- < Δ T1, where Δ T1 > 0 and the value of Δ T1 is different according to the amount of the oil stain, and/or,
the second dew point temperature = conventional dew point temperature- Δ T2, wherein Δ T2 > 0, and the value of Δ T2 varies with the amount of the cleaning agent.
In a preferred embodiment of the above control method, the step of "performing the degreasing mode alone" specifically includes:
controlling the temperature of the heat exchanger to be less than or equal to a first dew point temperature to condense the surface of the heat exchanger;
spraying cleaning agent to the surface of the heat exchanger;
controlling the temperature of the heat exchanger to rise to the optimal working temperature of the cleaning agent, and maintaining the set time;
controlling the temperature of the heat exchanger to be less than or equal to a second dew point temperature to condense the surface of the heat exchanger;
controlling the temperature of the heat exchanger to rise, so that the surface of the heat exchanger is dried again;
wherein the second dew point temperature is less than the first dew point temperature.
The invention also provides an air conditioner comprising a processor, wherein the processor is set to be capable of executing the control method in any one of the technical schemes.
Technical staff try to try a greasy dirt removing mode in the prior art, the greasy dirt removing mode in the prior art usually judges whether to remove greasy dirt through the amount of the greasy dirt, however, through long-time research and experiments by an inventor, the mode is found to have great disadvantages, namely once the greasy dirt exists, the speed of the deposited dust is greatly increased compared with the speed of the deposited dust without the greasy dirt, and once the greasy dirt exists, the speed of accumulating the same amount of greasy dirt again is greatly increased compared with the speed when the greasy dirt does not exist, the reason is that the greasy dirt has extremely strong adhesiveness, once the greasy dirt is stained, the speed of increasing the greasy dirt amount again is greatly increased, the same principle is achieved for the deposited dust, and as the viscosity of the greasy dirt is higher, the deposited dust is easier, and the dust deposition speed is greatly increased.
The degreasing mode in the prior art is generally not considered when the greasy dirt is less, or the cleaning mode is used to clean the air conditioner, so that the air conditioner is kept in a clean state. However, the scheme has the great disadvantage that when the oil stain is less, the oil stain accumulation speed and the ash deposition speed are greatly increased in the process of no consideration, heavier burden is brought to the air conditioner, later-period cleaning is difficult to clean completely, and energy waste is serious. When the oil stain is less, the oil stain is cleaned in a dust removing mode, and the condensation does not wash out the oil stain and only can reduce the amount of the oil stain, so that a small amount of oil stain still remains, and the oil stain still can quickly accumulate more oil stain and dust, which is undesirable for the technical personnel in the field.
As can be understood by those skilled in the art, in the technical solution of the present invention, the self-cleaning control method of an air conditioner specifically includes: detecting whether oil stains exist on the surface of the heat exchanger or not; when oil stains exist on the surface of the heat exchanger, detecting the ash deposition amount on the surface of the heat exchanger; comparing the ash deposition amount with a first preset ash deposition amount; and controlling the air conditioner to independently execute the degreasing mode or execute the degreasing mode after executing the dust removing mode according to the dust deposition amount and the first preset dust deposition amount.
According to the control method, the existing scheme of selectively controlling the air conditioner to carry out the oil stain removing mode or the dust removing mode according to the oil stain amount is abandoned, and once the oil stain is found, the cleaning mode is bound to have the oil stain removing mode, so that the oil stain cannot be remained again, the oil stain and dust amount cannot be rapidly accumulated, and the self-cleaning frequency of the air conditioner is reduced. In addition, the invention also selectively executes a mode of removing oil stain after removing deposited ash or a single oil stain removing mode according to different oil stain amounts, thereby avoiding the situation that the oil stain removing mode cannot be smoothly carried out or is not completely cleaned under the condition of excessive deposited ash.
Drawings
The self-cleaning control method of the air conditioner and the air conditioner according to the present invention will be described with reference to the accompanying drawings. In the drawings:
FIG. 1 is a flow chart of the present invention for selecting different operation modes according to the amount of oil contamination and dust deposition;
FIG. 2 is a flow chart of the combined operation of the ash removal mode and the degreasing mode of the present invention;
fig. 3 is a flow chart of the degreasing mode of the present invention operating independently.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications. For example, although the step S423 of the degreasing mode is described as an example of maintaining the heat exchanger to the optimum working temperature of the cleaning agent, it is obvious that the step of removing the cleaning agent does not substantially change, and even if the temperature is not raised, the cleaning agent can still work normally, or as the technology advances, the cleaning agent may still develop the optimum cleaning effect at a low temperature, and the temperature raising step of the step S423 is obviously not needed, so that the following embodiments are merely used for explaining the technical principle of the present invention and are not intended to limit the protection scope of the present invention.
First, referring to fig. 1, a self-cleaning control method of an air conditioner of the present invention will be described.
As shown in fig. 1, in order to solve the problem that the existing air conditioner cannot deeply clean the oil stains, the self-cleaning control method of the air conditioner of the invention comprises the following steps:
s100, detecting whether oil stains exist on the surface of the heat exchanger.
Since the greasy dirt is slightly different from the dust, and the greasy dirt has higher adhesiveness, the conventional dust detection method is not completely applicable, so the inventor lists several methods for detecting the greasy dirt, such as an image determination method, and analyzes the photos by using the photos taken periodically to determine whether the greasy dirt exists. Or a smooth finish judging method is used, the refractive index of the surface of the heat exchanger is measured by utilizing a reflection principle, oil stains and dust have different influences on the refractive index, and whether the oil stains exist on the surface of the heat exchanger can be judged in the mode. Of course, both of the above-mentioned methods are physical methods, and since the difference between the chemical compositions of oil stain and dust is large, the detection may be performed by a method related to chemical substance analysis, for example, a method of measuring the concentration of oil stain in the air between the fins of the heat exchanger in a non-operating state.
S200, detecting the ash deposition amount on the surface of the heat exchanger when oil stains exist on the surface of the heat exchanger.
S300, comparing the ash deposition amount with a first preset ash deposition amount.
S400, controlling the air conditioner to independently execute the degreasing mode or execute the degreasing mode after executing the dust deposition removing mode according to the dust deposition amount and the first preset dust deposition amount.
Wherein, step S400 specifically includes:
s410, when the accumulated dust amount is larger than or equal to a first preset accumulated dust amount, controlling the air conditioner to execute an accumulated dust removing mode and then execute a degreasing mode;
and S420, controlling the air conditioner to independently execute the degreasing mode when the accumulated ash amount is less than a first preset accumulated ash amount.
When judging that there is the greasy dirt on the surface of heat exchanger, still need come further judgement according to the volume of deposition and carry out earlier and remove the deposition mode and carry out the mode of deoiling again, or carry out the mode of deoiling alone, however, no matter what kind of selection, it all can carry out the mode of deoiling, and then thoroughly clean the greasy dirt, it is controllable to ensure the accumulation speed of follow-up greasy dirt and deposition volume, the difference lies in, the too much deposition in turn can also influence the effect of the mode of deoiling, consequently judge once more to the deposition.
The scheme for detecting the ash deposition amount is recorded in the prior art, for example, the judgment is performed by means of the power of a fan, the current of the fan, the heating capacity of an air conditioner and the like, and the scheme is different from oil stain detection and belongs to a conventional technical scheme, so that the detailed development is not performed.
The above steps S200 to S420 describe the control method when the oil contamination is present on the surface of the heat exchanger, and the control method when the oil contamination is not present on the surface of the heat exchanger is described below with continued reference to fig. 1.
And S500, detecting the ash deposition amount on the surface of the heat exchanger when the surface of the heat exchanger is not polluted by oil.
S600, comparing the ash deposition amount with a second preset ash deposition amount.
S610, when the ash deposition amount is larger than or equal to a second preset ash deposition amount, independently executing an ash deposition removing mode.
And S620, when the ash deposition amount is less than a second preset ash deposition amount, self-cleaning is not executed.
Wherein the second preset ash deposition amount is larger than the first preset ash deposition amount.
It should be noted that, when no oil stain exists, the second preset ash deposition amount can be set according to a conventional scheme, but when the oil stain exists, the ash deposition is more difficult to remove due to the oil stain, if the second preset ash deposition amount is set to be reached, the ash deposition removing operation is performed, and when the second preset ash deposition amount is not reached, the situation that the oil stain covers the ash deposition too much and the oil stain cannot be cleaned completely still occurs.
With reference to fig. 1, the present application has described the overall flow of the self-cleaning control method of the air conditioner, and for the "first perform the de-ashing mode and then perform the degreasing mode" mentioned in step S410 and the "perform the degreasing mode alone" mentioned in step S420, the applicant has also performed the adjustment and improvement to make the degreasing effect better or save more energy, and the following further refers to fig. 2 and fig. 3, respectively, to describe in detail the above two self-cleaning control methods of the air conditioner according to the present invention.
As shown in fig. 2, the improvement of the self-cleaning control method of "performing the ash removal mode first and then performing the degreasing mode" is first introduced, and in a possible embodiment, the step of "performing the ash removal mode first and then performing the degreasing mode" specifically includes:
s411, controlling the temperature of the heat exchanger to be less than or equal to the frost point temperature, and frosting the surface of the heat exchanger; wherein, the frost point temperature = the conventional frost point temperature- < delta > T1, < delta > T1 > 0, and the value of < delta > T1 is different with the amount of the oil stain.
S412, when the frosting thickness reaches a set value, controlling the temperature of the heat exchanger to be increased, and defrosting the surface of the heat exchanger;
the dust removing mode of the air conditioner belongs to a conventional mode, and generally comprises the steps of firstly frosting and then defrosting through a heat exchanger, then taking away the dust on the surface of the heat exchanger, and the frosting and defrosting can be realized through reversing of a four-way valve.
S413, when the defrosting degree is just completely melted, spraying a cleaning agent on the surface of the heat exchanger;
and S414, controlling the temperature of the heat exchanger to be less than or equal to the second dew point temperature, so that the surface of the heat exchanger is condensed. Wherein, can also open the fan and with the operation of first rotational speed for the condensation.
And S415, controlling the temperature of the heat exchanger to rise, and drying the surface of the heat exchanger again. In the process, the fan can be started and operated at a second rotating speed to accelerate the drying process, wherein the second rotating speed is larger than the first rotating speed.
The degreasing mode is that the cleaning agent is sprayed when water is required to be sprayed on the surface of the air conditioner, and compared with the scheme that the cleaning agent is sprayed in a direct anhydrous state, the cleaning effect is better. And this application has proposed earlier to go the deposition on the basis of going the deposition mode and removing the combination of greasy dirt mode, then removes greasy dirt to spray the cleaner when going the defrosting that the deposition in-process just melted completely, because the heat exchanger still remains snow water this moment, just so saved the step of the condensation among the greasy dirt mode of removing, compare in the direct stack of whole two kinds of modes, the time of having practiced thrift, also practiced thrift the required energy of condensation, user experience promotes.
In addition, for the selection of the frost point temperature, the selection is not directly selected, the heat transfer is difficult due to the increase of the oil stain amount, at the moment, the external environment is directly and simply used as the judgment of the frost point temperature, and the frosting failure of the surface of the heat exchanger can be possibly caused, so that a compensation mechanism is provided, the frost point temperature = the conventional frost point temperature- < delta > T1, the < delta > T1 > 0, the value of the < delta > T1 is different along with the difference of the oil stain amount, the selection of the < delta > T1 can be selected through an experience table, or the selection can be obtained through the calculation of the real-time heat exchange efficiency of the heat exchanger, and the frosting failure can be avoided.
Further description of step S413 is further provided in conjunction with fig. 2.
In a possible implementation, step S413 further includes:
s4131, when the defrosting degree is just completely melted, detecting the oil stain amount again;
s4132, judging the oil stain amount and the preset oil stain amount;
s4133, when the oil pollution amount is larger than or equal to the preset oil pollution amount, controlling the temperature of the heat exchanger to be smaller than or equal to the first dew point temperature, and condensing the surface of the heat exchanger. Wherein, can also open the fan and with the operation of first rotational speed for the condensation.
S4134, spraying a cleaning agent on the surface of the heat exchanger; wherein the first dew point temperature is less than the second dew point temperature, the second dew point temperature = conventional dew point temperature- < delta T2, the delta T2 is more than 0, and the value of the delta T2 is different along with the different amount of the cleaning agent. In the process of spraying the cleaning agent, the fan can be controlled to be closed, and the cleaning agent is prevented from being blown away.
In the embodiment, the judgment on the oil stain amount is newly added, and the cleaning agent is not directly sprayed on the surface of the heat exchanger, because if the oil stain amount is more than or equal to the preset oil stain amount, the defrosting degree just reaches the amount of water left when the oil stain amount is completely melted and is not enough to dissolve the cleaning agent required when the oil stain amount is larger, and the cleaning agent is directly sprayed at this time, so that the cleaning agent is possibly not fully dissolved, and further the oil stain is left. Therefore, a one-step condensation process is added, but even if the one-step process is added, as the defrosting process is carried out when the defrosting degree is just completely melted, a part of snow water still remains, so that the condensation time is shortened, and the energy consumption is reduced.
In addition, the invention also sets different heat exchanger temperatures based on different dirty states of the surfaces of the heat exchangers, namely, the first dew point temperature is limited to be lower than the second dew point temperature, because in the process of condensation for the first time when the temperature of the heat exchangers is less than or equal to the first dew point temperature, the surface of the heat exchangers has more oil stains, which is similar to a range hood, the heat transfer is more difficult due to the increase of the oil stains, and the condensation is not facilitated, at the moment, the first dew point temperature is lower than the conventional dew point temperature, and the first dew point temperature is less than the conventional dew point temperature, so that the smooth condensation can be realized. In the second condensation process, due to the fact that the cleaning agent is sprayed, oil stains are dissolved, a large piece of smooth surface is exposed, condensation becomes easy, the first dew point temperature is smaller than the second dew point temperature, the standard of conventional condensation cannot be achieved, and the second dew point temperature is smaller than the conventional dew point temperature. Therefore, the first dew point temperature is less than the second dew point temperature and less than the conventional dew point temperature, condensation is facilitated, the second dew point temperature = the conventional dew point temperature- < delta T2, < delta T2 > 0, and the selection of the delta T2 is the same as that of the delta T1 and can be obtained by table lookup or calculation of heat exchange efficiency under a heat exchanger.
S4135, controlling the temperature of the heat exchanger to rise to the optimal working temperature of the cleaning agent, and maintaining the set time;
s4136, when the oil pollution amount is smaller than the preset oil pollution amount, directly spraying a cleaning agent to the surface of the heat exchanger, and entering the step S4135.
The oil stain can be dissolved more thoroughly by increasing the temperature of the heat exchanger to the optimal working temperature of the cleaning agent and maintaining the set time. When the oil stain amount is less than the preset oil stain amount, the residual snow water in the dust removing mode is clean enough, so that the first condensation process can be removed, and the operation step of spraying the cleaning agent is directly carried out.
The improvement of the self-cleaning control method of "first performing the de-ashing mode and then performing the degreasing mode" has been described above, and similarly, the improvement of "performing the degreasing mode alone" is also performed, which is further described below with reference to fig. 3.
As shown in fig. 3, the scheme of "performing the degreasing mode alone" specifically includes:
s421, controlling the temperature of the heat exchanger to be less than or equal to the first dew point temperature to condense the surface of the heat exchanger;
s422, spraying a cleaning agent to the surface of the heat exchanger;
s423, controlling the temperature of the heat exchanger to be less than or equal to a second dew point temperature to condense the surface of the heat exchanger;
s424, controlling the temperature of the heat exchanger to rise, and drying the surface of the heat exchanger again;
and S425, controlling the temperature of the heat exchanger to rise to the optimal working temperature of the cleaning agent, and maintaining for a set time.
In the process of executing the soot removal mode and then executing the degreasing mode in the previous section, a plurality of proposals for the degreasing mode are introduced, but the most prominent invention point of executing the degreasing mode independently is that in the prior art, oil stain is subjected to a first condensation process, a cleaning agent is directly sprayed after condensation is finished, and then drying treatment is carried out, so that more cleaning agent and oil stain residues exist, and the effect is not good enough.
In another preferred embodiment, the first dew point temperature < the second dew point temperature, the advantages of which have already been explained above in connection with the combined de-ashing and de-smudging, are not described here again. To the control of fan, with remove the principle and the effect in the middle of the scheme that the deposition and deoiling combine, control the fan and move with first rotational speed at the condensation in-process, increase the condensation speed, close the fan when spraying the cleaner, during the dry heat exchanger, with the operation of second rotational speed.
In another embodiment, the second dew point temperature = conventional dew point temperature- Δ T2, where Δ T2 > 0, and the value of Δ T2 varies with the amount of the cleaning agent, the manner of obtaining Δ T2 and the beneficial effects of this arrangement are mentioned in the foregoing, and will not be described again.
In summary, when the heat exchanger has oil stains, different control methods are selected according to different oil stain amounts, but no matter which control method is adopted, the oil stains are treated, so that the self-cleaning control method of the air conditioner is more reasonable. Moreover, based on different control methods, the invention also provides a control method combining accumulated dust removal and oil stain removal, so that the time and energy required by the condensation process can be saved. In addition, the invention also provides a novel control method of the degreasing mode, namely a control method of double condensation.
It should be noted that the above-mentioned embodiments are only used for illustrating the principle of the present invention, and are not intended to limit the protection scope of the present invention, and those skilled in the art can modify the above-mentioned structure so that the present invention can be applied to more specific application scenarios without departing from the principle of the present invention.
For example, in an alternative embodiment, the re-drying of the heat exchanger surface is realized by controlling the temperature rise of the heat exchanger, but the heat exchanger itself can slowly realize the drying as long as the standing time is longer, therefore, the scheme of raising the temperature of the heat exchanger is not necessary as long as the heat exchanger surface drying can be realized, and the scheme belongs to the simple change on the basis of the invention, and the scheme does not deviate from the principle of the invention, and therefore, the invention falls into the protection scope of the invention.
In addition, the invention also provides an air conditioner, which comprises a processor, wherein the processor is set to be capable of executing the self-cleaning control method of the air conditioner in any one of the technical schemes.
Those skilled in the art will appreciate that the air conditioner described above may also include other known structures such as processors, controllers, memories, etc., wherein the memories include, but are not limited to, ram, flash, rom, prom, volatile, non-volatile, serial, parallel, or registers, etc., and the processors include, but are not limited to, CPLD/FPGA, DSP, ARM processor, MIPS processor, etc. Such well-known structures are not shown in the drawings in order to not unnecessarily obscure embodiments of the present disclosure.
Although the foregoing embodiments have described the steps in the foregoing sequence, those skilled in the art will understand that, in order to achieve the effect of the present embodiment, different steps are not necessarily performed in such a sequence, and may be performed simultaneously (in parallel) or in an inverse sequence, and these simple variations are within the scope of the present 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 (7)
1. A self-cleaning control method of an air conditioner is characterized by comprising the following steps:
detecting whether oil stains exist on the surface of the heat exchanger or not;
when oil stains exist on the surface of the heat exchanger, detecting the ash deposition amount on the surface of the heat exchanger;
comparing the ash deposition amount with a first preset ash deposition amount;
controlling the air conditioner to independently execute a degreasing mode or execute a degreasing mode after executing an ash deposition removing mode according to the ash deposition amount and a first preset ash deposition amount;
the step of executing the soot deposition removing mode and then executing the degreasing mode specifically comprises the following steps:
controlling the temperature of the heat exchanger to be less than or equal to the frost point temperature to frost the surface of the heat exchanger;
when the frosting thickness reaches a set value, controlling the temperature of the heat exchanger to be increased, and defrosting the surface of the heat exchanger;
when the defrosting degree just reaches the full melting, the oil stain amount is detected again;
judging the oil stain amount and the preset oil stain amount;
when the oil stain amount is larger than or equal to the preset oil stain amount, controlling the temperature of the heat exchanger to be smaller than or equal to the first dew point temperature so as to condense the surface of the heat exchanger;
spraying cleaning agent to the surface of the heat exchanger;
when the oil stain amount is less than the preset oil stain amount, directly spraying a cleaning agent on the surface of the heat exchanger;
controlling the temperature of the heat exchanger to be less than or equal to a second dew point temperature to condense the surface of the heat exchanger;
controlling the temperature of the heat exchanger to rise, so that the surface of the heat exchanger is dried again;
wherein the first dew point temperature is less than the second dew point temperature.
2. The control method according to claim 1, wherein the step of controlling the air conditioner to perform the degreasing mode alone or after performing the degreasing mode according to the soot deposition amount and a first predetermined soot deposition amount comprises:
when the ash deposition amount is larger than or equal to a first preset ash deposition amount, controlling the air conditioner to execute an ash deposition removing mode and then execute a degreasing mode;
and when the ash deposition amount is less than a first preset ash deposition amount, controlling the air conditioner to independently execute an oil stain removal mode.
3. The control method according to claim 1, wherein after the step of detecting whether the surface of the heat exchanger is greasy, the control method further comprises:
when oil stains do not exist on the surface of the heat exchanger, detecting the ash deposition amount on the surface of the heat exchanger;
comparing the ash deposition amount with a second preset ash deposition amount;
when the ash deposition amount is larger than or equal to a second preset ash deposition amount, independently executing an ash deposition removing mode;
when the ash deposition amount is less than a second preset ash deposition amount, self-cleaning is not executed;
wherein the second preset ash deposition amount is larger than the first preset ash deposition amount.
4. The control method according to claim 1, wherein after the step of "spraying the cleaning agent to the surface of the heat exchanger", the control method further comprises:
and controlling the temperature of the heat exchanger to rise to the optimal working temperature of the cleaning agent, and maintaining the temperature for a set time.
5. Control method according to claim 1, characterized in that the frost point temperature = conventional frost point temperature- Δ T1, where Δ T1 > 0 and the value of Δ T1 differs with the amount of oil contamination and/or,
the second dew point temperature = conventional dew point temperature- Δ T2, wherein Δ T2 > 0, and the value of Δ T2 varies with the amount of the cleaning agent.
6. The control method according to claim 1, wherein the step of "performing the degreasing mode alone" specifically includes:
controlling the temperature of the heat exchanger to be less than or equal to a first dew point temperature to condense the surface of the heat exchanger;
spraying cleaning agent to the surface of the heat exchanger;
controlling the temperature of the heat exchanger to rise to the optimal working temperature of the cleaning agent, and maintaining the set time;
controlling the temperature of the heat exchanger to be less than or equal to a second dew point temperature to condense the surface of the heat exchanger;
controlling the temperature of the heat exchanger to rise, so that the surface of the heat exchanger is dried again;
wherein the second dew point temperature is less than the first dew point temperature.
7. An air conditioner, characterized in that it comprises a processor arranged to be able to execute the self-cleaning control method of an air conditioner according to any one of claims 1 to 6.
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| CN202110064078.XA CN112710063B (en) | 2021-01-18 | 2021-01-18 | Self-cleaning control method of air conditioner and air conditioner |
| PCT/CN2021/120692 WO2022068732A1 (en) | 2021-01-18 | 2021-09-26 | Self-cleaning control method for air conditioner, and air conditioner |
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| CN114608135A (en) * | 2022-02-25 | 2022-06-10 | 青岛海尔空调器有限总公司 | Self-cleaning control method and device for air conditioner, air conditioner and storage medium |
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| CN112710063B (en) * | 2021-01-18 | 2022-10-28 | 青岛海尔空调器有限总公司 | Self-cleaning control method of air conditioner and air conditioner |
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- 2021-09-26 WO PCT/CN2021/120692 patent/WO2022068732A1/en active Application Filing
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