CN112283878B - Air conditioner control method and device, storage medium and air conditioner - Google Patents
Air conditioner control method and device, storage medium and air conditioner Download PDFInfo
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- CN112283878B CN112283878B CN202010991562.2A CN202010991562A CN112283878B CN 112283878 B CN112283878 B CN 112283878B CN 202010991562 A CN202010991562 A CN 202010991562A CN 112283878 B CN112283878 B CN 112283878B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000010257 thawing Methods 0.000 claims abstract description 91
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 238000004378 air conditioning Methods 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 19
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000003111 delayed effect Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
- F24F11/70—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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner control method, an air conditioner control device, a storage medium and an air conditioner, wherein the method comprises the following steps: in the heating mode, judging whether the temperature of an outdoor heat exchanger of the air conditioner is higher than the dew point temperature corresponding to the current outdoor environment temperature and humidity; if the temperature of the outdoor heat exchanger is not larger than the dew point temperature, judging whether the dew point temperature is larger than a preset value; and if the dew point temperature is judged to be not greater than the preset value, determining whether to perform regulation control on the air conditioner before defrosting or control the air conditioner to enter a defrosting mode according to the temperature difference value between the temperature of the outdoor heat exchanger and the dew point temperature. The scheme provided by the invention can optimize and judge the defrosting condition, reduce the useless energy consumption loss of the air conditioner and delay the defrosting time.
Description
Technical Field
The invention relates to the field of control, in particular to an air conditioner control method and device, a storage medium and an air conditioner.
Background
When the air conditioner heats, the refrigerant passes through the compressor, the evaporator and the condenser in sequence, and the condenser is in a low-temperature state for a long time, so the frost is easy to form. When the condenser frosts and reaches certain thickness, can influence the heat exchange efficiency of condenser, lead to the holistic heating capacity of air conditioner to descend, not only energy-conservingly, more influence the user and use experience. After the existing air conditioner heats for a period of time (or heats for a period of time cumulatively), a defrosting mode can be automatically started, namely, the four-way valve is reversed, the air conditioner starts to refrigerate, and the condenser is defrosted by a method of increasing the temperature of the condenser. The existing air conditioner generally presets a fixed time period, and the condenser is defrosted according to the fixed time period. However, the general judgment shows that the condition for entering the defrosting is single, the entering of the defrosting is early, the heating capacity needs to be sacrificed, the entering of the defrosting is slow, the frosting of the condenser is thick, and the attenuation of the heating capacity is serious.
Disclosure of Invention
The present invention is to overcome the above-mentioned drawbacks of the prior art, and provide an air conditioner control method, an air conditioner control device, a storage medium, and an air conditioner, so as to solve the problem of single determination condition for defrosting by heating in the prior art.
One aspect of the present invention provides an air conditioner control method, including: in the heating mode, judging whether the temperature of an outdoor heat exchanger of the air conditioner is higher than the dew point temperature corresponding to the current outdoor environment temperature and humidity; if the temperature of the outdoor heat exchanger is not larger than the dew point temperature, judging whether the dew point temperature is larger than a preset value; and if the dew point temperature is judged to be not greater than the preset value, determining whether to perform regulation control on the air conditioner before defrosting or control the air conditioner to enter a defrosting mode according to the temperature difference value between the temperature of the outdoor heat exchanger and the dew point temperature.
Optionally, determining whether to perform adjustment control on the air conditioner before defrosting or control the air conditioner to enter a defrosting mode according to the temperature difference between the temperature of the outdoor heat exchanger and the dew point temperature, including: if the temperature difference is larger than a first temperature threshold, adjusting and controlling the air conditioner before defrosting according to the temperature difference; if the temperature difference value is larger than the defrosting temperature difference set value and smaller than or equal to a first temperature threshold value, controlling the air conditioner to operate according to a normal heating logic; and if the temperature difference value is less than or equal to the defrosting temperature difference set value, controlling the air conditioner to enter a defrosting mode.
Optionally, the adjusting and controlling the air conditioner before defrosting according to the temperature difference value includes: when the temperature difference is greater than or equal to a second temperature threshold and less than or equal to a third temperature threshold, the opening degree of an expansion valve of the air conditioner is adjusted to reduce the exhaust temperature of the compressor by a first preset temperature value; when the temperature difference value is greater than or equal to a first temperature threshold value and smaller than a second temperature threshold value, controlling the frequency of a compressor of the air conditioner to reduce a preset frequency value, and reducing the exhaust temperature of the compressor by a second preset temperature value by adjusting the opening degree of an expansion valve of the air conditioner; wherein the defrosting temperature difference set value is smaller than the first temperature threshold value, the second temperature threshold value and the third temperature threshold value.
Another aspect of the present invention provides an air conditioning control apparatus, including: the first judgment unit is used for judging whether the temperature of an outdoor heat exchanger of the air conditioner is higher than the dew point temperature corresponding to the current outdoor environment temperature and humidity or not in the heating mode; the second judging unit is used for judging whether the dew point temperature is greater than a preset value or not if the outdoor heat exchanger temperature is judged to be not greater than the dew point temperature; and the determining unit is used for determining whether to perform regulation control on the air conditioner before defrosting or control the air conditioner to enter a defrosting mode according to the temperature difference value if the dew point temperature is judged to be not greater than the preset value, according to the temperature difference value between the outdoor heat exchanger temperature and the dew point temperature.
Optionally, the determining unit determines, according to a temperature difference between the temperature of the outdoor heat exchanger and the dew point temperature, whether to perform adjustment control on the air conditioner before defrosting according to the temperature difference or to control the air conditioner to enter a defrosting mode according to the temperature difference, and includes: if the temperature difference is larger than a first temperature threshold, adjusting and controlling the air conditioner before defrosting according to the temperature difference; if the temperature difference value is larger than the defrosting temperature difference set value and smaller than or equal to a first temperature threshold value, controlling the air conditioner to operate according to a normal heating logic; and if the temperature difference value is less than or equal to the defrosting temperature difference set value, controlling the air conditioner to enter a defrosting mode.
Optionally, the adjusting and controlling the air conditioner before defrosting according to the temperature difference value includes: when the temperature difference is greater than or equal to a second temperature threshold and less than or equal to a third temperature threshold, the opening degree of an expansion valve of the air conditioner is adjusted to reduce the exhaust temperature of the compressor by a first preset temperature value; when the temperature difference value is greater than or equal to a first temperature threshold value and smaller than a second temperature threshold value, controlling the frequency of a compressor of the air conditioner to reduce a preset frequency value, and reducing the exhaust temperature of the compressor by a second preset temperature value by adjusting the opening degree of an expansion valve of the air conditioner; wherein the defrosting temperature difference set value is smaller than the first temperature threshold value, the second temperature threshold value and the third temperature threshold value.
A further aspect of the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the methods described above.
Yet another aspect of the present invention provides an air conditioner comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, wherein the processor implements the steps of any of the methods described above when executing the program.
In another aspect, the invention provides an air conditioner, which comprises the air conditioner control device.
According to the technical scheme of the invention, the condition for judging the defrosting is optimized, the useless energy consumption loss of the air conditioner is reduced, the time for entering the defrosting can be delayed by adopting the adjustment and control before the defrosting, the heating capacity before the defrosting is optimized, and the use experience of a user is improved. When the frosting of the outdoor heat exchanger is detected, the exhaust temperature is reduced by adjusting the opening of the expansion valve, so that the throttling effect can be effectively reduced, the outdoor pressure is improved, the outdoor temperature is increased, and the heat exchange is effectively enhanced, so that the heating attenuation time is delayed, and the heating capacity before defrosting is optimized. If the heating attenuation cannot be effectively avoided, the frequency of the compressor is reduced, the exhaust temperature is reduced, the throttling effect is reduced, and the pressure of the outdoor side is further improved, so that the temperature of the outdoor side heat exchanger is improved, and the attenuation of the heating capacity is further effectively slowed down.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of an embodiment of an air conditioner control method according to the present invention;
FIG. 2 is a schematic diagram of the control relationship of the present invention;
FIG. 3 is a schematic diagram of an embodiment of a method for controlling an air conditioner according to the present invention;
fig. 4 is a block diagram of an embodiment of an air conditioning control apparatus according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic method diagram of an embodiment of an air conditioner control method provided by the present invention.
As shown in fig. 1, according to an embodiment of the present invention, the control method includes at least step S110, step S120, and step S130.
And step S110, judging whether the temperature of the outdoor heat exchanger of the air conditioner is higher than the dew point temperature corresponding to the current outdoor environment temperature and humidity in the heating mode.
Specifically, the current outdoor environment temperature and humidity are detected, the corresponding dew point temperature is calculated according to the detected outdoor environment temperature and humidity, and whether the temperature of the outdoor heat exchanger of the air conditioner is greater than the dew point temperature corresponding to the current outdoor environment temperature and humidity is judged. Optionally, the outdoor heat exchanger temperature is an outdoor heat exchanger tube temperature. Optionally, the tube temperature is the tube temperature at the lowest position of the tube temperature of the outdoor heat exchanger, and whether frosting is likely to occur on the outdoor side can be accurately detected.
And step S120, if the temperature of the outdoor heat exchanger is not greater than the dew point temperature, judging whether the dew point temperature is greater than a preset value.
Specifically, if the temperature of the outdoor heat exchanger is not greater than (less than or equal to) the dew point temperature, which indicates that the temperature of the outdoor heat exchanger is lower than the condensation point, whether the dew point temperature is greater than a preset value is further determined. Optionally, the preset value is 0 ℃, i.e. the freezing temperature of water.
Step S130, if the dew point temperature is judged to be not larger than the preset value, whether the air conditioner is subjected to regulation control before defrosting or is controlled to enter a defrosting mode according to the temperature difference value is determined according to the temperature difference value between the outdoor heat exchanger temperature and the dew point temperature.
In a specific embodiment, if the temperature difference is greater than a first temperature threshold, performing regulation control on the air conditioner before defrosting according to the temperature difference; if the temperature difference value is larger than the defrosting temperature difference set value and smaller than or equal to a first temperature threshold value, controlling the air conditioner to operate according to a normal heating logic; and if the temperature difference value is less than or equal to the defrosting temperature difference set value, controlling the air conditioner to enter a defrosting mode.
Optionally, the adjusting and controlling the air conditioner before defrosting according to the temperature difference specifically includes: when the temperature difference is greater than or equal to a second temperature threshold and less than or equal to a third temperature threshold, reducing the exhaust temperature of the compressor by a first preset temperature value by adjusting the opening degree of an expansion valve of the air conditioner (optionally, reducing the first preset temperature value on the basis of the target exhaust temperature determined during starting); when the temperature difference value is greater than or equal to the first temperature threshold value and smaller than the second temperature threshold value, controlling the frequency of the compressor of the air conditioner to reduce a preset frequency value (optionally, reducing the preset frequency value on the basis of the target frequency of the compressor determined during starting), and reducing the exhaust temperature of the compressor by adjusting the opening degree of the expansion valve of the air conditioner to reduce a second preset temperature value (optionally, reducing the second preset temperature value on the basis of the target exhaust temperature determined during starting). Wherein the defrosting temperature difference set value is smaller than the first temperature threshold value, the second temperature threshold value and the third temperature threshold value. For example, the first temperature threshold is 0 deg.C, the second temperature threshold is-0.5 deg.C, and the third temperature threshold is-1 deg.C.
Before the defrosting operation is normally carried out, the outdoor heat exchanger is frosted seriously, the heat exchange is reduced, and the heating attenuation is serious. However, the throttling effect of the system is improved due to the fact that the exhaust gas supply is too high, so that the pressure of the outdoor side is reduced too fast, and the frosting speed of the outdoor side heat exchanger is increased. By adopting the regulation control before defrosting, when the outdoor heat exchanger is detected to be frosted, the exhaust temperature is reduced by regulating the opening degree of the expansion valve, so that the throttling effect can be effectively reduced, the outdoor pressure is improved, the outdoor temperature is increased, the heat exchange is effectively enhanced, the time of heating attenuation is delayed, and the heating capacity before defrosting is optimized. If the heating attenuation can not be effectively avoided, the frequency of the compressor is reduced, the exhaust temperature is reduced, and the pressure of the outdoor side is further improved, so that the temperature of the outdoor side heat exchanger is improved, and the attenuation of the heating capacity is further effectively slowed down.
For example, the first temperature threshold is 0 deg.C, the second temperature threshold is-0.5 deg.C, and the third temperature threshold is-1 deg.C. The preset frequency value is 3Hz, the first preset temperature value is 5 ℃, and the second preset temperature value is 10 ℃. Judging the temperature difference T-T1 between the temperature T of the outdoor heat exchanger and the dew point temperature T1, and if T-Tl is [ -0.5 ℃,0] and continuing for a period of time, adjusting the opening degree of the expansion valve to reduce the exhaust temperature by 5 ℃ on the basis of the target exhaust temperature value when starting the machine, and continuing for a period of time; if T-Tl is [ -1 [ -0.5) and continues for a period of time, reducing the frequency of the compressor by 3Hz on the basis of the target frequency value during startup, and synchronously adjusting the opening degree of the expansion valve to reduce the exhaust temperature of the compressor by 10 ℃ on the basis of the target exhaust temperature value during startup and continue for a period of time; if T-Tl is equal to (defrosting temperature difference set value, -1) and lasts for a period of time, the heating system operates according to normal heating logic, and if T-Tl is less than or equal to the defrosting temperature difference set value and lasts for a period of time, the heating system enters a normal defrosting mode.
In one embodiment, the present invention may be implemented in a main control unit of an air conditioner. Referring to fig. 2, the temperature of the indoor side coil is detected by the indoor side coil temperature sensor, the temperature and humidity of the outdoor side environment are detected by the outdoor side environment temperature and humidity detection module, the corresponding dew point temperature is calculated by the calculation module according to the detected outdoor environment temperature and humidity, and the temperature of the outdoor side coil (the temperature of the outdoor heat exchanger) is detected by the outdoor side coil temperature sensor.
For clearly explaining the technical solution of the present invention, the following describes an execution flow of the air conditioner control method provided by the present invention with a specific embodiment.
Fig. 3 is a schematic method diagram of an embodiment of an air conditioner control method according to the present invention. The embodiment shown in fig. 3 includes steps 1 to 9.
Step 1: when the air conditioner starts to heat, acquiring a target frequency value and a target exhaust temperature value of a compressor at the moment;
step 2: detecting an outer tube temperature value T, wherein the outer tube temperature is the lowest temperature value of the outdoor heat exchanger;
and step 3: detecting outdoor temperature and humidity, and calculating to obtain corresponding dew point temperature T1;
and 4, step 4: determining whether T > T1 is satisfied; if yes, operating according to a normal heating logic; if not, executing the step 5;
and 5: judging whether Tl is more than 0 ℃, wherein 0 ℃ can refer to the freezing point of water; if yes, operating according to a normal heating logic; if not, judging according to the temperature difference value of T-Tl;
step 6: if T-Tl is E [ -0.5 ℃,0] and the time is kept for a while, executing step 601;
step 601: adjusting the opening of the expansion valve to reduce the exhaust temperature by 5 ℃ on the basis of the target exhaust temperature value obtained in the step 1, and continuing for a period of time;
and 7: T-Tl E [ -1 ℃, -0.5 ℃) for a period of time, then step 701 is executed;
step 701: reducing the target frequency of the compressor by 3Hz on the basis of the target frequency value obtained in the step 1, and synchronously adjusting the opening of the expansion valve to reduce the target exhaust temperature by 10 ℃ on the basis of the target exhaust temperature value obtained in the step 1, and continuing for a period of time;
and 8: T-Tl is in the shape of E (defrosting temperature difference set value, -1 ℃ C.) and lasts for a period of time, and then the operation is carried out according to normal heating logic;
and step 9: and if the T-Tl is less than or equal to the defrosting temperature difference set value and continues for a period of time, entering a normal defrosting mode until an exit condition is met and exiting the defrosting mode.
Fig. 4 is a block diagram of an embodiment of an air conditioning control apparatus according to the present invention. As shown in fig. 4, the air conditioning control device 100 includes a first judgment unit 110, a second judgment unit 120, and a determination unit 130.
The first determining unit 110 is configured to determine whether a temperature of an outdoor heat exchanger of the air conditioner is greater than a dew point temperature corresponding to a current outdoor environment temperature and humidity in the heating mode.
Specifically, the current outdoor environment temperature and humidity are detected, the corresponding dew point temperature is calculated according to the detected outdoor environment temperature and humidity, and whether the temperature of the outdoor heat exchanger of the air conditioner is greater than the dew point temperature corresponding to the current outdoor environment temperature and humidity is judged. Optionally, the outdoor heat exchanger temperature is an outdoor heat exchanger tube temperature. Optionally, the tube temperature is the tube temperature at the lowest position of the tube temperature of the outdoor heat exchanger, and whether frosting is likely to occur on the outdoor side can be accurately detected.
The second determining unit 120 is configured to determine whether the dew point temperature is greater than a preset value if the outdoor heat exchanger temperature is determined not to be greater than the dew point temperature.
Specifically, if the first determining unit 110 determines that the outdoor heat exchanger temperature is not greater than (less than or equal to) the dew point temperature, which indicates that the outdoor heat exchanger temperature is lower than the condensation point, the second determining unit 120 further determines whether the dew point temperature is greater than a preset value. Optionally, the preset value is 0 ℃, i.e. the freezing temperature of water.
The determining unit 130 is configured to determine whether to perform adjustment control on the air conditioner before defrosting or control the air conditioner to enter a defrosting mode according to the temperature difference between the outdoor heat exchanger temperature and the dew point temperature if the second determining unit 120 determines that the dew point temperature is not greater than the preset value.
In a specific embodiment, if the temperature difference is greater than a first temperature threshold, performing regulation control on the air conditioner before defrosting according to the temperature difference; if the temperature difference value is larger than the defrosting temperature difference set value and smaller than or equal to a first temperature threshold value, controlling the air conditioner to operate according to a normal heating logic; and if the temperature difference value is less than or equal to the defrosting temperature difference set value, controlling the air conditioner to enter a defrosting mode.
Optionally, the adjusting and controlling the air conditioner before defrosting according to the temperature difference specifically includes: when the temperature difference is greater than or equal to a second temperature threshold and less than or equal to a third temperature threshold, reducing the exhaust temperature of the compressor by a first preset temperature value by adjusting the opening degree of an expansion valve of the air conditioner (optionally, reducing the first preset temperature value on the basis of the target exhaust temperature determined during starting); when the temperature difference value is greater than or equal to the first temperature threshold value and smaller than the second temperature threshold value, controlling the frequency of the compressor of the air conditioner to reduce a preset frequency value (optionally, reducing the preset frequency value on the basis of the target frequency of the compressor determined during starting), and reducing the exhaust temperature of the compressor by adjusting the opening degree of the expansion valve of the air conditioner to reduce a second preset temperature value (optionally, reducing the second preset temperature value on the basis of the target exhaust temperature determined during starting). Wherein the defrosting temperature difference set value is smaller than the first temperature threshold value, the second temperature threshold value and the third temperature threshold value. For example, the first temperature threshold is 0 deg.C, the second temperature threshold is-0.5 deg.C, and the third temperature threshold is-1 deg.C.
Before the defrosting operation is normally carried out, the outdoor heat exchanger is frosted seriously, the heat exchange is reduced, and the heating attenuation is serious. However, the throttling effect of the system is improved due to the fact that the exhaust gas supply is too high, so that the pressure of the outdoor side is reduced too fast, and the frosting speed of the outdoor side heat exchanger is increased. By adopting the regulation control before defrosting, when the outdoor heat exchanger is detected to be frosted, the exhaust temperature is reduced by regulating the opening degree of the expansion valve, so that the throttling effect can be effectively reduced, the outdoor pressure is improved, the outdoor temperature is increased, the heat exchange is effectively enhanced, the time of heating attenuation is delayed, and the heating capacity before defrosting is optimized. If the heating attenuation can not be effectively avoided, the frequency of the compressor is reduced, the exhaust temperature is reduced, and the pressure of the outdoor side is further improved, so that the temperature of the outdoor side heat exchanger is improved, and the attenuation of the heating capacity is further effectively slowed down.
For example, the first temperature threshold is 0 deg.C, the second temperature threshold is-0.5 deg.C, and the third temperature threshold is-1 deg.C. The preset frequency value is 3Hz, the first preset temperature value is 5 ℃, and the second preset temperature value is 10 ℃. Judging the temperature difference T-T1 between the temperature T of the outdoor heat exchanger and the dew point temperature T1, and if T-Tl is [ -0.5 ℃,0] and continuing for a period of time, adjusting the opening degree of the expansion valve to reduce the exhaust temperature by 5 ℃ on the basis of the target exhaust temperature value when starting the machine, and continuing for a period of time; if T-Tl is [ -1 [ -0.5) and continues for a period of time, reducing the frequency of the compressor by 3Hz on the basis of the target frequency value during startup, and synchronously adjusting the opening degree of the expansion valve to reduce the exhaust temperature of the compressor by 10 ℃ on the basis of the target exhaust temperature value during startup and continue for a period of time; if T-Tl is equal to (defrosting temperature difference set value, -1) and lasts for a period of time, the heating system operates according to normal heating logic, and if T-Tl is less than or equal to the defrosting temperature difference set value and lasts for a period of time, the heating system enters a normal defrosting mode.
The present invention also provides a storage medium corresponding to the air conditioning control method, having a computer program stored thereon, which when executed by a processor, performs the steps of any of the aforementioned methods.
The invention also provides an air conditioner corresponding to the air conditioner control method, which comprises a processor, a memory and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the steps of any one of the methods when executing the program.
The invention also provides an air conditioner corresponding to the air conditioner control device, which comprises the air conditioner control device.
According to the scheme provided by the invention, the condition for judging the defrosting is optimized, the useless energy consumption loss of the air conditioner is reduced, the defrosting time can be delayed by adopting the adjustment and control before defrosting, the heating capacity before defrosting is optimized, and the use experience of a user is improved. When the frosting of the outdoor heat exchanger is detected, the exhaust temperature is reduced by adjusting the opening of the expansion valve, so that the throttling effect can be effectively reduced, the outdoor pressure is improved, the outdoor temperature is increased, and the heat exchange is effectively enhanced, so that the heating attenuation time is delayed, and the heating capacity before defrosting is optimized. If the heating attenuation cannot be effectively avoided, the frequency of the compressor is reduced, the exhaust temperature is reduced, the throttling effect is reduced, and the pressure of the outdoor side is further improved, so that the temperature of the outdoor side heat exchanger is improved, and the attenuation of the heating capacity is further effectively slowed down.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (7)
1. An air conditioner control method, comprising:
in the heating mode, judging whether the temperature of an outdoor heat exchanger of the air conditioner is higher than the dew point temperature corresponding to the current outdoor environment temperature and humidity;
if the temperature of the outdoor heat exchanger is not larger than the dew point temperature, judging whether the dew point temperature is larger than a preset value;
if the dew point temperature is judged to be not greater than the preset value, determining whether to perform regulation control on the air conditioner before defrosting or control the air conditioner to enter a defrosting mode according to the temperature difference value between the temperature of the outdoor heat exchanger and the dew point temperature;
determining whether to perform regulation control on the air conditioner before defrosting or control the air conditioner to enter a defrosting mode according to the temperature difference value, wherein the regulation control comprises the following steps:
if the temperature difference is larger than a first temperature threshold, adjusting and controlling the air conditioner before defrosting according to the temperature difference;
if the temperature difference value is larger than the defrosting temperature difference set value and smaller than or equal to a first temperature threshold value, controlling the air conditioner to operate according to a normal heating logic;
and if the temperature difference value is less than or equal to the defrosting temperature difference set value, controlling the air conditioner to enter a defrosting mode.
2. The method of claim 1, wherein the adjusting and controlling the air conditioner before defrosting according to the temperature difference value comprises the following steps:
when the temperature difference is greater than or equal to a second temperature threshold and less than or equal to a third temperature threshold, the opening degree of an expansion valve of the air conditioner is adjusted to reduce the exhaust temperature of the compressor by a first preset temperature value;
when the temperature difference value is greater than or equal to a first temperature threshold value and smaller than a second temperature threshold value, controlling the frequency of a compressor of the air conditioner to reduce a preset frequency value, and reducing the exhaust temperature of the compressor by a second preset temperature value by adjusting the opening degree of an expansion valve of the air conditioner;
wherein the defrosting temperature difference set value is smaller than the first temperature threshold value, the second temperature threshold value and the third temperature threshold value.
3. An air conditioning control device, characterized by comprising:
the first judgment unit is used for judging whether the temperature of an outdoor heat exchanger of the air conditioner is higher than the dew point temperature corresponding to the current outdoor environment temperature and humidity or not in the heating mode;
the second judging unit is used for judging whether the dew point temperature is greater than a preset value or not if the outdoor heat exchanger temperature is judged to be not greater than the dew point temperature;
the determining unit is used for determining whether to perform regulation control on the air conditioner before defrosting or control the air conditioner to enter a defrosting mode according to the temperature difference value if the dew point temperature is judged to be not greater than the preset value, and the temperature difference value is between the temperature of the outdoor heat exchanger and the dew point temperature;
the determining unit determines whether to perform regulation control on the air conditioner before defrosting or control the air conditioner to enter a defrosting mode according to the temperature difference value between the temperature of the outdoor heat exchanger and the dew point temperature, and includes:
if the temperature difference is larger than a first temperature threshold, adjusting and controlling the air conditioner before defrosting according to the temperature difference;
if the temperature difference value is larger than the defrosting temperature difference set value and smaller than or equal to a first temperature threshold value, controlling the air conditioner to operate according to a normal heating logic;
and if the temperature difference value is less than or equal to the defrosting temperature difference set value, controlling the air conditioner to enter a defrosting mode.
4. The device of claim 3, wherein the adjusting control of the air conditioner before defrosting according to the temperature difference value comprises:
when the temperature difference is greater than or equal to a second temperature threshold and less than or equal to a third temperature threshold, the opening degree of an expansion valve of the air conditioner is adjusted to reduce the exhaust temperature of the compressor by a first preset temperature value;
when the temperature difference value is greater than or equal to a first temperature threshold value and smaller than a second temperature threshold value, controlling the frequency of a compressor of the air conditioner to reduce a preset frequency value, and reducing the exhaust temperature of the compressor by a second preset temperature value by adjusting the opening degree of an expansion valve of the air conditioner;
wherein the defrosting temperature difference set value is smaller than the first temperature threshold value, the second temperature threshold value and the third temperature threshold value.
5. A storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any one of claims 1-2.
6. An air conditioner comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, the processor implementing the steps of the method of any one of claims 1-2 when executing the program.
7. An air conditioner characterized by comprising the air conditioner control device according to any one of claims 3 to 4.
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| CN114383264B (en) * | 2021-12-06 | 2023-07-18 | 青岛海尔空调器有限总公司 | Method and device for controlling air conditioner, air conditioner and storage medium |
| CN114543263B (en) * | 2022-01-29 | 2024-06-18 | 北京小米移动软件有限公司 | Coil temperature control method, coil temperature control device and storage medium |
| CN115451528B (en) * | 2022-09-26 | 2024-06-28 | 宁波奥克斯电气股份有限公司 | Defrosting control method, defrosting control device and air conditioner heat exchange system |
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