CN113203182A - Defrosting control method and device for air conditioner, air conditioner and storage medium - Google Patents
Defrosting control method and device for air conditioner, air conditioner and storage medium Download PDFInfo
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- CN113203182A CN113203182A CN202110456089.2A CN202110456089A CN113203182A CN 113203182 A CN113203182 A CN 113203182A CN 202110456089 A CN202110456089 A CN 202110456089A CN 113203182 A CN113203182 A CN 113203182A
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- air conditioner
- heat exchange
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a defrosting control method and device for an air conditioner, the air conditioner and a storage medium, wherein the method comprises the following steps: acquiring the tube temperature of an outdoor unit heat exchanger; determining that the temperature of a heat exchanger tube is lower than a preset temperature, and acquiring the heat exchange quantity of the heat exchanger in unit area; and controlling the air conditioner to defrost if the heat exchange amount per unit area is lower than the target value. From this, according to the heat transfer capacity of sign heat exchanger or the unit area heat transfer volume of heat-absorbing ability, can confirm whether the heat exchanger can satisfy the heat transfer demand to under the condition that can't satisfy the heat transfer demand, control air conditioner changes the frost, can avoid the air conditioner to appear not having the phenomenon of the frost change frost or frequent change frost, on the one hand, can promote the comfort of heating of air conditioner, on the other hand, can also reduce the consumption of air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioner control operation, in particular to a defrosting control method and device of an air conditioner, the air conditioner and a storage medium.
Background
In the heating condition of the air conditioner, the temperature of a heat exchange tube of an outdoor unit can reach below zero, the frosting condition can occur, the air flow is blocked due to a thick frost layer, and the heating capacity of the air conditioner is affected, so the air conditioner needs to perform defrosting regularly.
In the related art, whether a defrosting condition is met is judged according to the temperature of a heat exchange tube of an outdoor unit, and specifically, when the duration of the temperature of the heat exchange tube being lower than zero reaches a set duration, the air conditioner is controlled to start defrosting.
However, the above method of directly determining the defrosting time according to the tube temperature of the heat exchanger may cause the condition of entering defrosting when the frost layer is not thick, or the condition of entering defrosting without frost, even more, the condition of entering defrosting frequently, which seriously affects the heating comfort of the air conditioner and increases unnecessary energy consumption of the equipment.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
The invention provides a defrosting control method and device for an air conditioner, the air conditioner and a storage medium, and aims to solve the technical problems that in the prior art, because the temperature of a heat exchanger pipe is only the temperature at the lowest temperature of a heat exchanger, the heat exchange quantity of the whole heat exchanger cannot be represented, the defrosting time can be judged directly according to the temperature of the heat exchanger pipe, the frosting quantity of the heat exchanger cannot be effectively judged, the situations of no defrosting and frequent defrosting can occur, the heating comfort of the air conditioner is seriously influenced, and the unnecessary energy consumption of equipment is increased.
To achieve the above object, a first embodiment of the present invention provides a defrosting control method for an air conditioner, including:
acquiring the tube temperature of an outdoor unit heat exchanger;
determining that the temperature of the heat exchanger tube is lower than a preset temperature, and acquiring the heat exchange amount of the heat exchanger in unit area;
and controlling the air conditioner to defrost if the unit area heat exchange quantity is determined to be lower than the target value.
According to the defrosting control method of the air conditioner, the tube temperature of the heat exchanger of the outdoor unit is obtained; determining that the temperature of a heat exchanger tube is lower than a preset temperature, and acquiring the heat exchange quantity of the heat exchanger in unit area; and controlling the air conditioner to defrost if the heat exchange amount per unit area is lower than the target value. From this, according to the heat transfer capacity of sign heat exchanger or the unit area heat transfer volume of heat-absorbing ability, can confirm whether the heat exchanger can satisfy the heat transfer demand to under the condition that can't satisfy the heat transfer demand, control air conditioner changes the frost, can avoid the air conditioner to appear not having the phenomenon of the frost change frost or frequent change frost, on the one hand, can promote the comfort of heating of air conditioner, on the other hand, can also reduce the consumption of air conditioner.
To achieve the above object, a second embodiment of the present invention provides a defrosting control device for an air conditioner, including:
the first acquisition module is used for acquiring the tube temperature of the outdoor unit heat exchanger;
the first determining module is used for determining that the temperature of the heat exchanger tube is lower than a preset temperature;
the second acquisition module is used for acquiring the heat exchange quantity of the heat exchanger in unit area;
the second determining module is used for determining that the unit area heat exchange quantity is lower than a target value;
and the control module is used for controlling the air conditioner to defrost.
According to the defrosting control device of the air conditioner, the tube temperature of the heat exchanger of the outdoor unit is obtained; determining that the temperature of a heat exchanger tube is lower than a preset temperature, and acquiring the heat exchange quantity of the heat exchanger in unit area; and controlling the air conditioner to defrost if the heat exchange amount per unit area is lower than the target value. From this, according to the heat transfer capacity of sign heat exchanger or the unit area heat transfer volume of heat-absorbing ability, can confirm whether the heat exchanger can satisfy the heat transfer demand to under the condition that can't satisfy the heat transfer demand, control air conditioner changes the frost, can avoid the air conditioner to appear not having the phenomenon of the frost change frost or frequent change frost, on the one hand, can promote the comfort of heating of air conditioner, on the other hand, can also reduce the consumption of air conditioner.
To achieve the above object, an embodiment of a third aspect of the present invention provides an air conditioner, including: a processor and a memory; wherein the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to implement the defrosting control method of the air conditioner as set forth in the embodiment of the first aspect of the present invention.
In order to achieve the above object, a fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements a defrosting control method of an air conditioner as set forth in the first aspect of the present invention.
In order to achieve the above object, a fifth aspect of the present invention provides a computer program product, which is characterized in that when instructions in the computer program product are executed by a processor, the computer program product is used for implementing the defrosting control method of the air conditioner as set forth in the first aspect of the present invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart illustrating a defrosting control method of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a defrosting control method of an air conditioner according to a second embodiment of the present invention;
FIG. 3 is a diagram illustrating the variation of KA values with time according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of a defrosting control method for an air conditioner according to a third embodiment of the present invention;
FIG. 5 is a diagram illustrating a relationship between KA and Gr after correction according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a relationship between KA and FAN after correction according to an embodiment of the present invention;
fig. 7 is a schematic flowchart of a defrosting control method for an air conditioner according to a fourth embodiment of the present invention;
fig. 8 is a schematic structural diagram of a defrosting control device of an air conditioner according to a fifth embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The invention mainly aims at the problems that in the prior art, the frosting amount of a heat exchanger cannot be effectively judged by a method for judging the defrosting time according to the temperature of a heat exchanger tube, the conditions of no defrosting and frequent defrosting are likely to occur, the heating comfort of an air conditioner is seriously influenced, and unnecessary equipment energy consumption is increased; determining that the temperature of a heat exchanger tube is lower than a preset temperature, and acquiring the heat exchange quantity of the heat exchanger in unit area; and controlling the air conditioner to defrost if the heat exchange amount per unit area is lower than the target value. From this, according to the heat transfer capacity of sign heat exchanger or the unit area heat transfer volume of heat-absorbing ability, can confirm whether the heat exchanger can satisfy the heat transfer demand to under the condition that can't satisfy the heat transfer demand, control air conditioner changes the frost, can avoid the air conditioner to appear not having the phenomenon of the frost change frost or frequent change frost, on the one hand, can promote the comfort of heating of air conditioner, on the other hand, can also reduce the consumption of air conditioner.
A defrosting control method and apparatus of an air conditioner, and a storage medium according to embodiments of the present invention are described below with reference to the accompanying drawings. Before describing embodiments of the present invention in detail, for ease of understanding, common terminology will be introduced first:
the wet bulb temperature refers to the air temperature when the water vapor in the air is saturated under the air state with the same enthalpy value, and the wet bulb temperature is the dry bulb temperature of the corresponding point on the air enthalpy diagram, which is reduced from the air state point to the 100% relative humidity line along the isenthalpic line.
Dry bulb temperature, refers to the value read on a dry bulb temperature scale exposed to air without direct exposure to the sun.
Fig. 1 is a flowchart illustrating a defrosting control method of an air conditioner according to an embodiment of the present invention.
The defrosting control method of the air conditioner provided by the embodiment of the invention can be applied to the air conditioner.
As shown in fig. 1, the defrosting control method of the air conditioner may include the steps of:
In the embodiment of the invention, the tube temperature of the outdoor unit heat exchanger can be obtained through the related temperature sensor. For example, the heat exchanger tube temperature is labeled T3。
In a possible implementation manner of the embodiment of the present invention, the relevant temperature sensor may be disposed on the air conditioner, so that the air conditioner may directly obtain the tube temperature of the outdoor unit heat exchanger from the relevant temperature sensor.
In another possible implementation manner of the embodiment of the present invention, the related temperature sensor may also be provided independently of the air conditioner. For example, when the relevant temperature sensor is independent of the air conditioner, when the relevant temperature sensor collects the tube temperature of the heat exchanger, the collected tube temperature of the heat exchanger can be sent to the air conditioner in a wireless mode, such as WiFi, Bluetooth and the like, so that the air conditioner can obtain the tube temperature of the heat exchanger.
And 102, determining that the temperature of the heat exchanger tube is lower than a preset temperature, and acquiring the heat exchange amount of the heat exchanger in unit area.
In this embodiment of the present invention, the preset temperature is preset, for example, the preset temperature may be preset by a built-in program of the air conditioner, or the preset temperature may also be set by a user, for example, the user may set the preset temperature through a mobile terminal bound to the air conditioner, which is not limited in this embodiment of the present invention. For example, the preset temperature may be zero degrees.
In the embodiment of the invention, the heat exchange amount per unit area of the heat exchanger is used for representing the heat exchange capacity (namely the capacity of the heat exchanger to absorb heat from the environment) of the heat exchanger, wherein the heat exchange amount per unit area and the heat exchange capacity of the heat exchanger form a positive relation, namely when the heat exchange amount per unit area is larger, the heat exchange capacity of the heat exchanger is higher, and when the heat exchange amount per unit area is smaller, the heat exchange capacity of the heat exchanger is lower.
In the embodiment of the present invention, the air conditioner may determine whether the temperature of the heat exchanger tube is lower than a preset temperature, and may not need to control the air conditioner to defrost when the temperature of the heat exchanger tube is not lower than the preset temperature, and may obtain the heat exchange amount per unit area of the heat exchanger when the temperature of the heat exchanger tube is lower than the preset temperature, for example, mark the heat exchange amount per unit area as KA, where K is a heat transfer coefficient and a is an area (area).
And 103, controlling the air conditioner to defrost if the heat exchange amount per unit area is lower than the target value.
In the embodiment of the invention, whether the heat exchange amount per unit area is lower than a target value or not can be judged, and when the heat exchange amount per unit area is not lower than the target value, the heat exchange capacity or the heat absorption capacity of the heat exchanger is higher, at the moment, the heat exchange requirement can be met, so that the air conditioner does not need to be controlled to defrost, namely, the air conditioner can continue to operate; when the heat exchange amount per unit area is lower than the target value, the heat exchange capacity or the heat absorption capacity of the heat exchanger is insufficient, and at the moment, the heat exchange requirement cannot be met, so that the air conditioner can be controlled to defrost.
According to the defrosting control method of the air conditioner, the tube temperature of the heat exchanger of the outdoor unit is obtained; determining that the temperature of a heat exchanger tube is lower than a preset temperature, and acquiring the heat exchange quantity of the heat exchanger in unit area; and controlling the air conditioner to defrost if the heat exchange amount per unit area is lower than the target value. From this, according to the heat transfer capacity of sign heat exchanger or the unit area heat transfer volume of heat-absorbing ability, can confirm whether the heat exchanger can satisfy the heat transfer demand to under the condition that can't satisfy the heat transfer demand, control air conditioner changes the frost, can avoid the air conditioner to appear not having the phenomenon of the frost change frost or frequent change frost, on the one hand, can promote the comfort of heating of air conditioner, on the other hand, can also reduce the consumption of air conditioner.
In a possible implementation manner of the embodiment of the present invention, the heat exchange amount per unit area of the heat exchanger of the outdoor unit may be determined according to the heat exchange amount of the outdoor unit, the temperature of the outdoor wet bulb, and the temperature of the heat exchanger tube. The above process is described in detail with reference to example two.
Fig. 2 is a flowchart illustrating a defrosting control method of an air conditioner according to a second embodiment of the present invention.
As shown in fig. 2, the defrosting control method of the air conditioner may include the steps of:
The execution process of step 201 may refer to the execution process of step 101 in the above embodiments, which is not described herein again.
In the embodiment of the present invention, the heat exchange amount of the outdoor unit of the air conditioner may be obtained when the temperature of the heat exchanger pipe is lower than the preset temperature, for example, the heat exchange amount of the outdoor unit is marked as Q. Alternatively, the heat exchange amount of the outdoor unit of the air conditioner may be determined according to a heat exchange amount calculation formula in the related art, which is not limited in the embodiment of the present invention.
In the embodiment of the invention, the outdoor wet bulb temperature can be obtained when the temperature of the heat exchanger tube is lower than the preset temperature, for example, the outdoor wet bulb temperature is marked as T4w. Optionally, the outdoor wet bulb temperature can be collected by a relevant sensor, or the outdoor wet bulb temperature can be obtained according to the weather forecast of the area where the air conditioner is locatedThe temperature is not limited in this respect by the examples of the invention.
The relevant sensor may be disposed on the air conditioner, or the relevant sensor may also be disposed independently of the air conditioner, which is not limited in the embodiment of the present invention.
And step 203, determining the heat exchange amount in unit area according to the heat exchange amount, the outdoor wet bulb temperature and the heat exchanger pipe temperature.
In the embodiment of the invention, the temperature of the outdoor wet bulb can be T according to the heat exchange quantity Q4wTube temperature T of heat exchanger3And determining the heat exchange amount KA of the heat exchanger in unit area.
As an example, the heat exchange amount KA per unit area may be calculated according to the following formula:
KA＝Q/(T4w-T3)；(1)
it should be noted that the above calculation method is only exemplary, and those skilled in the art may set other calculation formulas according to actual situations. For example, those skilled in the art may also add some correction factors to the above calculation formula. Such changes in the specific calculation may be made without departing from the basic principles of the present invention and fall within the scope of the present invention.
As an example, when the air conditioner is in a heating condition, the calculated KA values at various times may be as shown in fig. 3.
And 204, controlling the air conditioner to defrost if the heat exchange amount per unit area is lower than the target value.
In a possible implementation manner of the embodiment of the present invention, the target value may be determined according to historical operation data of the air conditioner and operation data at the current time. Specifically, the operation data (including the historical operation data and the operation data at the current time) may be read in real time to determine the maximum value of the heat exchange amount per unit area corresponding to each time, and the target value may be determined according to the maximum value and the setting coefficient.
The setting coefficient is preset, for example, the setting coefficient may be preset by a built-in program of the air conditioner, or the setting coefficient may also be set by a user, which is not limited in the embodiment of the present invention. For example, the set coefficient is marked as wi, for example wi may be 30%.
As an example, the maximum value of KA since the air conditioner was turned on may be read, or the maximum value of KA since the last (most recent) defrosting may be read, for example, labeled as KA _ max, and the product of KA _ max and wi is taken as the target value.
In another possible implementation manner of the embodiment of the present invention, in order to prevent the calculation error of the KA peak, the target value may be fixed, for example, the fixed target value may be KA _ const.
In the embodiment of the invention, when the heat exchange amount per unit area is lower than the target value, the heat exchange amount per unit area is determined to be seriously attenuated, and the heat exchanger cannot meet the heat exchange requirement, and at the moment, the air conditioner can be controlled to defrost.
According to the defrosting control method of the air conditioner, the heat exchange quantity of the outdoor unit and the outdoor wet bulb temperature are obtained, and the heat exchange quantity of the unit area is determined according to the heat exchange quantity, the outdoor wet bulb temperature and the heat exchanger pipe temperature, so that the reliability of the calculation result of the heat exchange quantity of the unit area can be improved.
In a possible implementation manner of the embodiment of the present invention, in order to further improve the reliability of the calculation result of the heat exchange amount per unit area, so as to reduce the probability of frequent defrosting of the air conditioner, in the embodiment of the present invention, the calculated heat exchange amount per unit area of the heat exchanger of the outdoor unit may be corrected. The above process is described in detail with reference to example three.
Fig. 4 is a flowchart illustrating a defrosting control method of an air conditioner according to a third embodiment of the present invention.
As shown in fig. 4, the defrosting control method of the air conditioner may include the steps of:
It should be noted that, steps 301 and 302 may be implemented by any one of the embodiments of the present invention, and the embodiments of the present invention are not limited to this and are not described again.
And step 303, acquiring the current air volume and the refrigerant flow of the outdoor unit.
In the embodiment of the present invention, the current air volume and the refrigerant flow rate of the outdoor unit may be determined according to the related art, which is not limited in the embodiment of the present invention. For example, the current air volume is marked as FAN and the refrigerant flow rate is marked as Gr.
And 304, correcting the heat exchange amount in unit area according to the current air volume and the refrigerant flow.
In the embodiment of the invention, the heat exchange amount in unit area can be corrected according to the current air volume and the refrigerant flow.
In a possible implementation manner of the embodiment of the present invention, a mapping relationship between an air volume of the outdoor unit, a refrigerant flow rate, and a heat exchange amount per unit area may be calibrated in advance, so that in the embodiment of the present invention, the heat exchange amount per unit area may be corrected according to the mapping relationship.
As an example, the heat exchange amount per unit area may be corrected according to the following formula:
KA’＝f(Gr,FAN)*KA；(2)
where KA' represents the corrected heat exchange amount per unit area, and f (Gr, FAN) is a polynomial of Gr and FAN, and may be obtained by calibration in advance.
As an example, a relationship diagram between the corrected KA (or KA') and Gr can be shown in FIG. 5, and a relationship diagram between the corrected KA and FAN can be shown in FIG. 6. As can be seen from fig. 5 and 6, the corrected KA has a positive relationship with FAN and GR, that is, the corrected KA increases with increasing FAN and increases with increasing GR.
And 305, controlling the air conditioner to defrost if the corrected heat exchange amount per unit area is lower than the target value.
In the embodiment of the invention, when the corrected heat exchange amount per unit area is lower than the target value, the condition that the heat exchange amount per unit area is seriously attenuated and the heat exchanger cannot meet the heat exchange requirement can be determined, and at the moment, the air conditioner can be controlled to defrost.
According to the defrosting control method of the air conditioner, the current air volume and the refrigerant flow of the outdoor unit are obtained; and correcting the heat exchange amount in unit area according to the current air volume and the refrigerant flow. Therefore, the heat exchange quantity per unit area is corrected, so that the effective heat exchange quantity per unit area under various conditions can be obtained, and the reliability of the calculation result of the heat exchange quantity per unit area can be improved.
In a possible implementation manner of the embodiment of the present invention, in order to further avoid the phenomenon that the air conditioner has no frost or has frequent frost, a duration that the temperature of the heat exchanger tube is lower than a preset temperature may be counted, and when the duration reaches a set duration and the heat exchange amount per unit area is lower than a target value, the air conditioner is controlled to defrost. The above process is described in detail with reference to example four.
Fig. 7 is a flowchart illustrating a defrosting control method of an air conditioner according to a fourth embodiment of the present invention.
As shown in fig. 7, the defrosting control method of the air conditioner may include the steps of:
It should be noted that, steps 401 and 402 may be implemented by any one of the embodiments of the present invention, and the embodiments of the present invention are not limited to this and are not described again.
In step 403, the duration of the heat exchanger tube temperature being below the preset temperature is determined.
In the embodiment of the invention, when the temperature of the heat exchanger tube is lower than the preset temperature, the duration of the temperature of the heat exchanger tube lower than the preset temperature can be counted.
And step 404, if the duration time is determined to reach the set duration time and the heat exchange amount per unit area is lower than the target value, controlling the air conditioner to defrost.
In the embodiment of the invention, the air conditioner can judge whether the duration that the temperature of the heat exchanger tube is lower than the preset temperature reaches the set duration, and when the duration does not reach the set duration, the air conditioner does not need to be controlled to defrost, namely, the air conditioner can continue to operate; when the duration reaches the set duration, whether the heat exchange amount per unit area is lower than the target value or not can be further judged, and when the heat exchange amount per unit area is not lower than the target value, the heat exchange capacity or the heat absorption capacity of the heat exchanger is higher, at the moment, the heat exchanger can meet the heat exchange requirement, so that the air conditioner does not need to be controlled to defrost, namely, the air conditioner can continue to operate; and when the heat exchange amount per unit area is lower than the target value, the heat exchange capacity or the heat absorption capacity of the heat exchanger is insufficient, and at the moment, the heat exchanger cannot meet the heat exchange requirement, so that the air conditioner can be controlled to defrost.
According to the defrosting control method of the air conditioner, disclosed by the embodiment of the invention, the duration time for the temperature of the heat exchanger tube to be lower than the preset temperature is determined; and controlling the air conditioner to defrost if the duration reaches the set duration and the heat exchange amount per unit area is lower than the target value. Therefore, the phenomenon that the air conditioner is frostless or frequently frosted can be further avoided, and the heating comfort of the air conditioner is improved.
Corresponding to the defrosting control method of the air conditioner provided by the above embodiment, an embodiment of the present invention further provides a defrosting control device of the air conditioner. Since the defrosting control device of the air conditioner provided by the embodiment of the present invention corresponds to the defrosting control method of the air conditioner provided by the above embodiment, the implementation of the defrosting control method of the air conditioner described above is also applicable to the defrosting control device of the air conditioner provided by the embodiment, and will not be described in detail in the embodiment.
Fig. 8 is a schematic structural diagram of a defrosting control device of an air conditioner according to a fifth embodiment of the present invention. The defrosting control device of the air conditioner is applied to the air conditioner.
As shown in fig. 8, the defrosting control device 100 of the air conditioner may include: a first obtaining module 110, a first determining module 120, a second obtaining module 130, a second determining module 140, and a control module 150.
Wherein the content of the first and second substances,
the first obtaining module 110 is configured to obtain a tube temperature of an outdoor unit heat exchanger.
The first determining module 120 is configured to determine that the heat exchanger tube temperature is lower than a preset temperature.
And the second obtaining module 130 is configured to obtain a heat exchange amount per unit area of the heat exchanger.
And a second determining module 140, configured to determine that the heat exchange amount per unit area is lower than a target value.
And the control module 150 is used for controlling the air conditioner to defrost.
In a possible implementation manner of the embodiment of the present invention, the second obtaining module 120 is specifically configured to: acquiring the heat exchange quantity of an outdoor unit and the temperature of an outdoor wet bulb; and determining the heat exchange amount per unit area according to the heat exchange amount, the outdoor wet bulb temperature and the heat exchanger tube temperature.
In a possible implementation manner of the embodiment of the present invention, the defrosting control device 100 of an air conditioner may further include:
and the reading module is used for reading the operation data in real time so as to determine the maximum value in the unit area heat exchange quantity corresponding to each moment.
And the third determining module is used for determining the target value according to the maximum value and the setting coefficient.
In one possible implementation of the embodiment of the present invention, the target value is fixed.
In a possible implementation manner of the embodiment of the present invention, the defrosting control device 100 of an air conditioner may further include:
and the third acquisition module is used for acquiring the current air volume and the refrigerant flow of the outdoor unit.
And the correction module is used for correcting the heat exchange quantity in unit area according to the current air quantity and the refrigerant flow.
In a possible implementation manner of the embodiment of the present invention, the second determining module 140 is specifically configured to: determining the duration of the temperature of the heat exchanger tube being lower than the preset temperature; and determining that the duration reaches the set duration and the heat exchange amount per unit area is lower than a target value.
According to the defrosting control device of the air conditioner, the tube temperature of the heat exchanger of the outdoor unit is obtained; determining that the temperature of a heat exchanger tube is lower than a preset temperature, and acquiring the heat exchange quantity of the heat exchanger in unit area; and controlling the air conditioner to defrost if the heat exchange amount per unit area is lower than the target value. From this, according to the heat transfer capacity of sign heat exchanger or the unit area heat transfer volume of heat-absorbing ability, can confirm whether the heat exchanger can satisfy the heat transfer demand to under the condition that can't satisfy the heat transfer demand, control air conditioner changes the frost, can avoid the air conditioner to appear not having the phenomenon of the frost change frost or frequent change frost, on the one hand, can promote the comfort of heating of air conditioner, on the other hand, can also reduce the consumption of air conditioner.
In order to implement the above embodiments, the present invention further provides an air conditioner, including: a processor and a memory; the processor reads the executable program code stored in the memory to run a program corresponding to the executable program code, so as to implement the defrosting control method of the air conditioner proposed in any one of the embodiments of fig. 1 to 7.
In order to implement the above embodiments, the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is configured to implement the defrosting control method of the air conditioner proposed in any one of the embodiments of fig. 1 to 7 when executed by a processor.
In order to implement the above embodiments, the present invention further provides a computer program product, which when executed by an instruction processor in the computer program product, performs the defrosting control method of an air conditioner according to any one of the foregoing embodiments of fig. 1 to 7.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (14)
1. A defrosting control method of an air conditioner is characterized by comprising the following steps:
acquiring the tube temperature of an outdoor unit heat exchanger;
determining that the temperature of the heat exchanger tube is lower than a preset temperature, and acquiring the heat exchange amount of the heat exchanger in unit area;
and controlling the air conditioner to defrost if the unit area heat exchange quantity is determined to be lower than the target value.
2. The method of claim 1, wherein the obtaining the heat exchange amount per unit area of the outdoor unit heat exchanger comprises:
acquiring the heat exchange quantity of an outdoor unit and the temperature of an outdoor wet bulb;
and determining the heat exchange amount per unit area according to the heat exchange amount, the outdoor wet bulb temperature and the heat exchanger tube temperature.
3. The method of claim 1, wherein prior to determining that the amount of heat exchange per unit area is below a target value, the method further comprises:
reading operation data in real time to determine the maximum value in the unit area heat exchange quantity corresponding to each moment;
and determining the target value according to the maximum value and a setting coefficient.
4. The method of claim 1, wherein the target value is fixed.
5. The method of claim 1, wherein after obtaining the amount of heat exchange per unit area of the heat exchanger, the method further comprises:
acquiring the current air volume and the refrigerant flow of the outdoor unit;
and correcting the heat exchange amount in unit area according to the current air volume and the refrigerant flow.
6. The method according to any one of claims 1 to 5, wherein if it is determined that the heat exchange amount per unit area is lower than a target value, controlling the air conditioner to defrost comprises:
determining the duration of the heat exchanger tube temperature being lower than a preset temperature;
and if the duration time is determined to reach the set duration time and the heat exchange amount per unit area is lower than the target value, controlling the air conditioner to defrost.
7. A defrosting control device of an air conditioner, comprising:
the first acquisition module is used for acquiring the tube temperature of the outdoor unit heat exchanger;
the first determining module is used for determining that the temperature of the heat exchanger tube is lower than a preset temperature;
the second acquisition module is used for acquiring the heat exchange quantity of the heat exchanger in unit area;
the second determining module is used for determining that the unit area heat exchange quantity is lower than a target value;
and the control module is used for controlling the air conditioner to defrost.
8. The apparatus of claim 7, wherein the second obtaining module is specifically configured to:
acquiring the heat exchange quantity of an outdoor unit and the temperature of an outdoor wet bulb;
and determining the heat exchange amount per unit area according to the heat exchange amount, the outdoor wet bulb temperature and the heat exchanger tube temperature.
9. The apparatus of claim 7, further comprising:
the reading module is used for reading the operation data in real time so as to determine the maximum value in the unit area heat exchange quantity corresponding to each moment;
and the third determining module is used for determining the target value according to the maximum value and a setting coefficient.
10. The apparatus of claim 7, wherein the target value is fixed.
11. The apparatus of claim 7, further comprising:
the third acquisition module is used for acquiring the current air volume and the refrigerant flow of the outdoor unit;
and the correction module is used for correcting the heat exchange quantity in unit area according to the current air quantity and the refrigerant flow.
12. The apparatus according to any one of claims 7 to 11, wherein the second determining module is specifically configured to:
determining the duration of the heat exchanger tube temperature being lower than a preset temperature;
and determining that the duration reaches a set duration, and the heat exchange amount per unit area is lower than the target value.
13. An air conditioner, comprising: a processor and a memory; wherein the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, for implementing the defrosting control method of the air conditioner as claimed in any one of claims 1 to 6.
14. A computer-readable storage medium on which a computer program is stored, the computer program, when being executed by a processor, implementing a defrosting control method of an air conditioner according to any one of claims 1 to 6.
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