CN113465133A - Air conditioner control method, air conditioner and medium - Google Patents
Air conditioner control method, air conditioner and medium Download PDFInfo
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- CN113465133A CN113465133A CN202010238502.3A CN202010238502A CN113465133A CN 113465133 A CN113465133 A CN 113465133A CN 202010238502 A CN202010238502 A CN 202010238502A CN 113465133 A CN113465133 A CN 113465133A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000003507 refrigerant Substances 0.000 claims abstract description 168
- 238000001514 detection method Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 abstract description 8
- 230000000704 physical effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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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
- F24F2140/40—Damper positions, e.g. open or closed
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- Combustion & Propulsion (AREA)
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method of an air conditioner, the air conditioner and a medium, comprising the following steps: starting up; acquiring the refrigerant temperature of a loop between an indoor unit and an outdoor unit, the refrigerant pressure of the loop between the indoor unit and the outdoor unit, the air suction refrigerant temperature of a compressor, the air suction refrigerant pressure of the compressor, the cylinder volume of the compressor and the operating frequency of the compressor; acquiring a refrigerant enthalpy value according to the refrigerant temperature and the refrigerant pressure, and acquiring a suction refrigerant enthalpy value and a suction refrigerant density according to the suction refrigerant temperature and the suction refrigerant pressure; acquiring the mass flow of the refrigerant according to the density of the air suction refrigerant, the cylinder volume of the compressor and the operating frequency of the compressor; and obtaining the refrigerating capacity according to the refrigerant mass flow, the refrigerant enthalpy value and the suction refrigerant enthalpy value. The control method of the air conditioner can effectively calculate the refrigerating capacity in operation, thereby being applied to various unit regulation controls according to the refrigerating capacity calculation method, simple and effective, and low in cost.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner, the air conditioner and a non-transitory computer readable storage medium.
Background
The refrigerating capacity of the air conditioner needs to be calculated according to the average dry-bulb temperature, the average wet-bulb temperature and the air quantity of the air outlet and the air return of the unit, and the average air outlet and return temperature and the average air quantity of the unit can be collected only by installing the air conditioner in specific equipment.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the control method of the air conditioner can effectively calculate the refrigerating capacity in operation, can be applied to various unit regulation and control according to the refrigerating capacity calculation method, and is simple, effective and low in cost.
The invention further provides the air conditioner based on the control method of the air conditioner.
The invention also proposes a non-transitory computer-readable storage medium.
According to a first aspect of the present invention, a method for controlling an air conditioner including an indoor unit, an outdoor unit, and a compressor connected to each other to form a closed circuit, includes:
starting up;
acquiring the refrigerant temperature of a loop between the indoor unit and the outdoor unit, the refrigerant pressure of the loop between the indoor unit and the outdoor unit, the air suction refrigerant temperature of the compressor, the air suction refrigerant pressure of the compressor, the cylinder volume of the compressor and the operating frequency of the compressor;
acquiring a refrigerant enthalpy value according to the refrigerant temperature and the refrigerant pressure, and acquiring a suction refrigerant enthalpy value and a suction refrigerant density according to the suction refrigerant temperature and the suction refrigerant pressure;
acquiring the mass flow of the refrigerant according to the density of the air suction refrigerant, the cylinder volume of the compressor and the operating frequency of the compressor;
and obtaining the refrigerating capacity according to the refrigerant mass flow, the refrigerant enthalpy value and the suction refrigerant enthalpy value.
The control method of the air conditioner can effectively calculate the refrigerating capacity in operation, can be applied to various unit regulation controls according to the refrigerating capacity calculation method, and is simple, effective and low in cost.
In addition, the control method of the air conditioner according to the embodiment of the present invention has the following additional technical features:
according to some embodiments of the present invention, the refrigerant mass flow rate is calculated according to the following formula:
and m is rho V H, wherein m is the refrigerant mass flow, rho is the suction refrigerant density, V is the cylinder volume of the compressor, and H is the operating frequency of the compressor.
According to some embodiments of the invention, the cooling capacity is calculated according to the following formula:
Q＝m*(hsuction device-hSmall) Wherein Q is the refrigerating capacity, m is the refrigerant mass flow, hSuction deviceIs the enthalpy value, h, of the suction refrigerantGo back toIs the enthalpy of the refrigerant.
According to some embodiments of the present invention, the refrigerant temperature, the refrigerant pressure, the suction refrigerant temperature, the suction refrigerant pressure, the cylinder volume of the compressor, and the operating frequency of the compressor are obtained when the air conditioner is in steady operation.
In some embodiments of the present invention, the control method of the air conditioner further includes:
acquiring a parameter value of the air conditioner during steady-state operation, and recording the parameter value and the refrigerating capacity at the moment in a database;
when the air conditioner operates in a steady state again, acquiring a parameter value at the moment;
determining whether the parameter value is equal to a parameter value in the database:
if the parameter value is not equal to the parameter value in the database, recording the parameter value and the refrigerating capacity at the moment in the database;
if the parameter value is equal to the parameter value in the database, judging whether the refrigerating capacity at the moment is less than or equal to a time of the refrigerating capacity corresponding to the parameter value in the database:
if yes, prompting system failure.
In some embodiments of the invention, the parameter values include an indoor ambient temperature, an outdoor ambient temperature, an operating frequency of the compressor, and a wind level of the indoor unit.
In some embodiments of the present invention, the air conditioner reaches a steady state operation when the fluctuation of the operating frequency of the compressor is within ± bHz and the duration of the fluctuation of the indoor ambient temperature within ± c ℃ is greater than t.
According to the air conditioner of the embodiment of the second aspect of the present invention, the control method of the air conditioner according to the embodiment of the first aspect of the present invention includes: the indoor unit, the outdoor unit and the compressor are connected to form a closed loop; the loop detection device is used for acquiring the temperature and the pressure of the refrigerant and is arranged on a loop between the indoor unit and the outdoor unit; the air suction detection device is used for acquiring the temperature and the pressure of the air suction refrigerant and is arranged at an air suction port of the compressor; the control module is respectively communicated with the indoor unit, the outdoor unit and the compressor, the control module acquires the cylinder volume of the compressor and the operating frequency of the compressor, the control module acquires the enthalpy value of the refrigerant according to the temperature and the pressure of the refrigerant and acquires the enthalpy value of the air suction refrigerant and the density of the air suction refrigerant according to the temperature and the pressure of the air suction refrigerant, and the control module acquires the mass flow of the refrigerant according to the density of the air suction refrigerant, the cylinder volume of the compressor and the operating frequency of the compressor and acquires the refrigerating capacity according to the mass flow of the refrigerant, the enthalpy value of the refrigerant and the enthalpy value of the air suction refrigerant.
According to the air conditioner provided by the embodiment of the invention, the refrigerating capacity in operation can be effectively calculated, so that various unit regulation controls according to the refrigerating capacity calculation method can be realized, and the air conditioner is simple, effective and low in cost.
In addition, the air conditioner according to the embodiment of the present invention has the following additional technical features:
according to some embodiments of the present invention, a first control valve is provided on a loop between the indoor unit and the outdoor unit, the loop detection device is provided between the first control valve and the outdoor unit, and the loop detection device includes a loop bulb and a loop pressure sensor.
A non-transitory computer-readable storage medium according to an embodiment of the third aspect of the present invention has stored thereon a computer program that, when executed by a processor, implements a control method of an air conditioner according to an embodiment of the first aspect of the present invention.
According to the non-transitory computer readable storage medium provided by the embodiment of the invention, the refrigerating capacity in operation can be effectively calculated, so that the method can be applied to various unit regulation controls according to the refrigerating capacity calculation method, and is simple, effective and low in cost.
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
Fig. 1 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic structural view of an air conditioner according to an embodiment of the present invention.
Reference numerals:
the air conditioner 1, the indoor unit 10, the outdoor unit 20, the compressor 30, the circuit detection device 40, the circuit bulb 41, the circuit pressure sensor 42, the suction air detection device 50, the suction air bulb 51, the suction air pressure sensor 52, the first control valve 61, and the second control valve 62.
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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A control method of an air conditioner according to an embodiment of the first aspect of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a method for controlling an air conditioner according to an embodiment of the present invention, the air conditioner including an indoor unit, an outdoor unit, and a compressor connected to each other and forming a closed circuit, includes:
and starting the computer.
Obtaining the refrigerant temperature T of the loop between the indoor unit and the outdoor unitGo back toRefrigerant pressure P of a circuit between an indoor unit and an outdoor unitGo back toAir suction refrigerant temperature T of compressorSuction deviceSuction refrigerant pressure P of compressorSuction deviceThe cylinder volume V of the compressor and the operating frequency H of the compressor. Understandably, for the refrigerant temperature TGo back toRefrigerant pressure PGo back toAnd the temperature T of the air suction refrigerantSuction deviceAnd suction refrigerant pressure PSuction deviceThe acquisition of the cylinder volume V of the compressor and the operating frequency H of the compressor can be carried out separately.
According to the temperature T of the refrigerantGo back toRefrigerant pressure PGo back toObtaining enthalpy value h of refrigerantGo back toAccording to the temperature T of the refrigerant to be suckedSuction deviceAnd suction refrigerant pressure PSuction deviceAcquiring enthalpy value h of air suction refrigerantSuction deviceAnd a suction refrigerant density ρ. For example, according to the refrigerant temperature TGo back toRefrigerant pressure PGo back toThe enthalpy value h of the refrigerant can be found by inquiring a refrigerant table in combination with the physical property of the refrigerantGo back toAccording to the temperature T of the refrigerant to be suckedSuction deviceAnd suction refrigerant pressure PSuction deviceAnd combining the physical property of the refrigerant, the enthalpy value h of the air suction refrigerant can be found by inquiring a refrigerant tableSuction deviceAnd a suction refrigerant density ρ.
And acquiring the mass flow m of the refrigerant according to the suction refrigerant density rho, the cylinder volume V of the compressor and the operating frequency H of the compressor. For example, the refrigerant mass flow rate m is calculated according to the following formula:
and m is rho V H, wherein m is the mass flow of the refrigerant, rho is the density of the suction refrigerant, V is the cylinder volume of the compressor, and H is the operating frequency of the compressor.
According to the mass flow m and enthalpy value h of the refrigerantGo back toAnd the enthalpy value h of the air-breathing refrigerantSuction deviceAnd obtaining the refrigerating capacity Q. For example, the cooling capacity Q is calculated according to the following formula:
Q＝m*(hsuction device-hSmall) Wherein Q is refrigerating capacity, m is refrigerant mass flow, hSuction deviceFor the enthalpy of the suction refrigerant, hGo back toIs the enthalpy of the refrigerant.
The control method of the air conditioner can effectively calculate the refrigerating capacity in operation, can be applied to various unit regulation controls according to the refrigerating capacity calculation method, and is simple, effective and low in cost. The invention can realize accurate test of actual output refrigerating output through acquisition of other indirect data without entering a test bed, thereby providing key actual refrigerating output data for energy-saving operation of the air conditioner, and the data calculated by the method can be checked and calculated according to the data acquired by the main control board of the unit.
According to some embodiments of the invention, the refrigerant temperature T is obtained during steady-state operation of the air conditionerGo back toRefrigerant pressure PGo back toAnd the temperature T of the air suction refrigerantSuction deviceAnd suction refrigerant pressure PSuction deviceThe cylinder volume V of the compressor and the operating frequency H of the compressor. For example, when the fluctuation of the operating frequency of the compressor is within ± bHz and the duration of the fluctuation of the indoor ambient temperature within ± c ℃ is greater than t, the air conditioner reaches a steady-state operation.
And acquiring a parameter value of the air conditioner in steady-state operation, and recording the parameter value and the refrigerating capacity at the moment in a database. For example, the parameter values include an indoor ambient temperature, an outdoor ambient temperature, an operating frequency of the compressor, and a damper of the indoor unit.
When the air conditioner is operated in a steady state again, the parameter value at this time is acquired. For example, the steady-state operation of the air conditioner again means that whether the air conditioner reaches the steady-state operation can be continuously judged in one-time starting operation of the air conditioner, and a corresponding control process is executed; and whether the air conditioner reaches steady-state operation or not can be judged when the air conditioner is started to operate next time.
Judging whether the parameter value is equal to the parameter value in the database:
if the parameter value is not equal to the parameter value in the database, the parameter value and the refrigerating capacity at the moment are recorded in the database, namely a piece of recorded data is added to the database.
If the parameter value is equal to the parameter value in the database, judging whether the refrigerating capacity at the moment is less than or equal to a time of the refrigerating capacity corresponding to the parameter value in the database:
and if the refrigerating capacity at the moment is less than or equal to the refrigerating capacity corresponding to the parameter value in the database of a times, prompting the system fault.
Therefore, according to the control method of the air conditioner, the running condition of the air conditioner can be effectively detected without accurately detecting the cooling capacity, and a user is prompted to maintain the air conditioner when the actual cooling capacity does not accord with the judgment condition.
A control method of an air conditioner according to an embodiment of the present invention is described in detail with reference to fig. 2.
And starting the computer.
And (3) judging whether the air conditioner operates in a steady state or not, namely whether the duration of the fluctuation of the operating frequency of the compressor within +/-3 Hz and the fluctuation of the indoor environment temperature within +/-1 ℃ is more than 30min or not.
Acquiring the temperature T of the refrigerant when the air conditioner operates in a steady stateGo back toRefrigerant pressure PGo back toAnd the temperature T of the air suction refrigerantSuction deviceAnd suction refrigerant pressure PSuction deviceThe cylinder volume V of the compressor and the operating frequency H of the compressor.
According to the temperature T of the refrigerantGo back toRefrigerant pressure PGo back toAnd combines the physical property of the refrigerant to obtain the enthalpy value h of the refrigerant by inquiring a refrigerant tableGo back toAccording to the temperature T of the refrigerant to be suckedSuction deviceAnd suction refrigerant pressure PSuction deviceAnd combining the physical property of the refrigerant, and obtaining the enthalpy value h of the air suction refrigerant by inquiring a refrigerant tableSuction deviceAnd a suction refrigerant density ρ.
Calculating the mass flow m of the refrigerant according to the following formula:
and m is rho V H, wherein m is the mass flow of the refrigerant, rho is the density of the suction refrigerant, V is the cylinder volume of the compressor, and H is the operating frequency of the compressor.
The refrigerating capacity Q is calculated according to the following formula:
Q＝m*(hsuction device-hSmall) Wherein Q is refrigerating capacity, m is refrigerant mass flow, hSuction deviceFor the enthalpy of the suction refrigerant, hGo back toIs the enthalpy of the refrigerant.
And acquiring the indoor environment temperature, the outdoor environment temperature, the running frequency of the compressor and the wind level of the indoor unit at the moment, and recording the parameter values and the refrigerating capacity at the moment in a database.
And when the air conditioner meets the condition that the fluctuation of the operating frequency of the compressor is within +/-3 Hz and the duration time of the fluctuation of the indoor environment temperature within +/-1 ℃ is longer than 30min, acquiring the indoor environment temperature, the outdoor environment temperature, the operating frequency of the compressor and the wind level of the indoor unit at the moment.
Judging whether the indoor environment temperature, the outdoor environment temperature, the running frequency of the compressor and the wind shield of the indoor unit at the moment are all correspondingly equal to the indoor environment temperature, the outdoor environment temperature, the running frequency of the compressor and the wind shield of the indoor unit in the database:
if not, recording the current indoor environment temperature, the outdoor environment temperature, the running frequency of the compressor, the wind level of the indoor unit and the current refrigerating capacity in the database, namely adding a piece of recording data into the database.
If all the refrigerating capacities are equal to each other, judging whether the refrigerating capacity is less than or equal to 0.8 times of the indoor environment temperature, the outdoor environment temperature, the running frequency of the compressor and the refrigerating capacity (namely Q) corresponding to the wind gear of the indoor unit in the databaseFruit of Chinese wolfberryWhether or not less than or equal to 0.8QNote the book，QFruit of Chinese wolfberryFor the refrigerating capacity at this time, QNote the bookIndoor ambient temperature, outdoor ambient temperature, running frequency of the compressor, and refrigerating capacity corresponding to the wind gear of the indoor unit in the database):
and if the refrigerating capacity at the moment is less than or equal to 0.8 time of the refrigerating capacity corresponding to the parameter value in the database, prompting the system fault.
As shown in fig. 3, the air conditioner 1 according to the second embodiment of the present invention, based on the control method of the air conditioner according to the first embodiment of the present invention, includes: an indoor unit 10, an outdoor unit 20, a compressor 30, a loop detection device 40, a suction detection device 50 and a control module which are connected to form a closed loop.
Specifically, the circuit detection device 40 is used to obtain the refrigerant temperature and the refrigerant pressure, and the circuit detection device 40 is disposed in a circuit between the indoor unit 10 and the outdoor unit 20. The suction detection device 50 is configured to obtain a temperature of a suction refrigerant and a pressure of the suction refrigerant, and the suction detection device 50 is disposed at a suction port of the compressor 30. The control module is respectively communicated with the indoor unit 10, the outdoor unit 20 and the compressor 30, the control module obtains the cylinder volume of the compressor 30 and the operating frequency of the compressor 30, the control module obtains the enthalpy value of the refrigerant according to the temperature and the pressure of the refrigerant and obtains the enthalpy value and the density of the air-breathing refrigerant according to the temperature and the pressure of the air-breathing refrigerant, and the control module obtains the mass flow rate of the refrigerant according to the density of the air-breathing refrigerant, the cylinder volume of the compressor 30 and the operating frequency of the compressor 30 and obtains the refrigerating capacity according to the mass flow rate, the enthalpy value and the enthalpy value of the air-breathing refrigerant.
According to the air conditioner 1 provided by the embodiment of the invention, the refrigerating capacity in operation can be effectively calculated, so that various unit regulation controls according to the refrigerating capacity calculation method can be realized, and the air conditioner is simple, effective and low in cost.
According to some embodiments of the present invention, a first control valve 61 is provided in a loop between the indoor unit 10 and the outdoor unit 20, and a second control valve 62 is provided in a loop between the indoor unit 10 and the compressor 30. The loop detection device 40 is disposed between the first control valve 61 and the outdoor unit 20, the loop detection device 40 includes a loop thermal bulb 41 and a loop pressure sensor, the loop thermal bulb 41 is used for detecting the refrigerant temperature at the small pipe connection of the indoor unit 10 and the outdoor unit 20, and the loop pressure sensor 42 is used for detecting the refrigerant pressure at the small pipe connection of the indoor unit 10 and the outdoor unit 20. The intake air detection device 50 includes an intake air bulb 51 and an intake air pressure sensor 52, the intake air bulb 51 is configured to detect a refrigerant temperature, and the intake air pressure sensor 52 is configured to detect a refrigerant pressure. Therefore, the control method can be realized by utilizing the self structure of the air conditioner 1 without adding additional parts, and the air conditioner has simple structure and low cost.
Other configurations and operations of the air conditioner 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
A non-transitory computer-readable storage medium according to an embodiment of the third aspect of the present invention has stored thereon a computer program that, when executed by a processor, implements a control method of an air conditioner according to an embodiment of the first aspect of the present invention.
According to the non-transitory computer readable storage medium provided by the embodiment of the invention, the refrigerating capacity in operation can be effectively calculated, so that the method can be applied to various unit regulation controls according to the refrigerating capacity calculation method, and is simple, effective and low in cost.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, "a first feature" or "a second feature" may include one or more of the features, and the first feature "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. The first feature being "on," "over" and "above" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "a specific embodiment," "an example" or "some examples" or the like are intended to 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 do not necessarily 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.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A control method of an air conditioner, wherein the air conditioner comprises an indoor unit, an outdoor unit and a compressor which are connected to form a closed loop, the method comprising:
starting up;
acquiring the refrigerant temperature of a loop between the indoor unit and the outdoor unit, the refrigerant pressure of the loop between the indoor unit and the outdoor unit, the air suction refrigerant temperature of the compressor, the air suction refrigerant pressure of the compressor, the cylinder volume of the compressor and the operating frequency of the compressor;
acquiring a refrigerant enthalpy value according to the refrigerant temperature and the refrigerant pressure, and acquiring a suction refrigerant enthalpy value and a suction refrigerant density according to the suction refrigerant temperature and the suction refrigerant pressure;
acquiring the mass flow of the refrigerant according to the density of the air suction refrigerant, the cylinder volume of the compressor and the operating frequency of the compressor;
and obtaining the refrigerating capacity according to the refrigerant mass flow, the refrigerant enthalpy value and the suction refrigerant enthalpy value.
2. The method of claim 1, wherein the refrigerant mass flow rate is calculated according to the following formula:
and m is rho V H, wherein m is the refrigerant mass flow, rho is the suction refrigerant density, V is the cylinder volume of the compressor, and H is the operating frequency of the compressor.
3. The control method of an air conditioner according to claim 1, wherein the cooling capacity is calculated according to the following formula:
Q＝m*(hsuction device-hSmall) Wherein Q is the refrigerating capacity, m is the refrigerant mass flow, hSuction deviceIs the enthalpy value, h, of the suction refrigerantGo back toIs the enthalpy of the refrigerant.
4. The method as claimed in any one of claims 1 to 3, wherein the refrigerant temperature, the refrigerant pressure, the suction refrigerant temperature, the suction refrigerant pressure, the cylinder volume of the compressor and the operating frequency of the compressor are obtained at a steady operation of the air conditioner.
5. The control method of an air conditioner according to claim 4, further comprising:
acquiring a parameter value of the air conditioner during steady-state operation, and recording the parameter value and the refrigerating capacity at the moment in a database;
when the air conditioner operates in a steady state again, acquiring a parameter value at the moment;
determining whether the parameter value is equal to a parameter value in the database:
if the parameter value is not equal to the parameter value in the database, recording the parameter value and the refrigerating capacity at the moment in the database;
if the parameter value is equal to the parameter value in the database, judging whether the refrigerating capacity at the moment is less than or equal to a time of the refrigerating capacity corresponding to the parameter value in the database:
if yes, prompting system failure.
6. The control method of an air conditioner according to claim 5, wherein the parameter values include an indoor ambient temperature, an outdoor ambient temperature, an operation frequency of the compressor, and a windshield of the indoor unit.
7. The control method of an air conditioner according to claim 4, wherein the air conditioner reaches a steady state operation when the fluctuation of the operating frequency of the compressor is within ± bHz and the duration of the fluctuation of the indoor ambient temperature within ± c ℃ is greater than t.
8. An air conditioner based on the control method of the air conditioner according to any one of claims 1 to 7, characterized by comprising:
the indoor unit, the outdoor unit and the compressor are connected to form a closed loop;
the loop detection device is used for acquiring the temperature and the pressure of the refrigerant and is arranged on a loop between the indoor unit and the outdoor unit;
the air suction detection device is used for acquiring the temperature and the pressure of the air suction refrigerant and is arranged at an air suction port of the compressor;
the control module is respectively communicated with the indoor unit, the outdoor unit and the compressor, the control module acquires the cylinder volume of the compressor and the operating frequency of the compressor, the control module acquires the enthalpy value of the refrigerant according to the temperature and the pressure of the refrigerant and acquires the enthalpy value of the air suction refrigerant and the density of the air suction refrigerant according to the temperature and the pressure of the air suction refrigerant, and the control module acquires the mass flow of the refrigerant according to the density of the air suction refrigerant, the cylinder volume of the compressor and the operating frequency of the compressor and acquires the refrigerating capacity according to the mass flow of the refrigerant, the enthalpy value of the refrigerant and the enthalpy value of the air suction refrigerant.
9. The air conditioner as claimed in claim 8, wherein a first control valve is provided on a circuit between the indoor unit and the outdoor unit, and the circuit detecting means is provided between the first control valve and the outdoor unit, the circuit detecting means including a circuit bulb and a circuit pressure sensor.
10. A non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the control method of an air conditioner according to any one of claims 1 to 7.
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| CN202010238502.3A CN113465133A (en) | 2020-03-30 | 2020-03-30 | Air conditioner control method, air conditioner and medium |
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| CN202010238502.3A CN113465133A (en) | 2020-03-30 | 2020-03-30 | Air conditioner control method, air conditioner and medium |
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