CN109945389B - Control method and device of air conditioner and air conditioner - Google Patents
Control method and device of air conditioner and air conditioner Download PDFInfo
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- CN109945389B CN109945389B CN201910248831.3A CN201910248831A CN109945389B CN 109945389 B CN109945389 B CN 109945389B CN 201910248831 A CN201910248831 A CN 201910248831A CN 109945389 B CN109945389 B CN 109945389B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides a control method and a control device of an air conditioner and the air conditioner, wherein the air conditioner comprises the following components: the outdoor condenser, the indoor evaporator, the first electronic expansion valve, the throttle valve and a refrigerant pipe arranged in the electronic control unit; the outdoor condenser is communicated with a first end of the refrigerant pipe through a first electronic expansion valve, the indoor evaporator is communicated with a second end of the refrigerant pipe through a throttle valve, the first electronic expansion valve is used for throttling the refrigerant in the heating mode, and the throttle valve is used for throttling the refrigerant in the cooling mode. According to the control method and device of the air conditioner and the air conditioner, the electric control of the air conditioner is radiated through the refrigerant pipe, so that heat generated by the electric control can be taken away in time, the temperature of components is reduced, and the reliability and the service life of the air conditioner are improved; meanwhile, for the variable frequency air conditioner, higher working frequency can be achieved at high temperature, higher power is output, the advantages of the variable frequency air conditioner are exerted, and the requirements of users are met.
Description
Technical Field
The invention relates to the technical field of electric appliances, in particular to a control method and device of an air conditioner and the air conditioner.
Background
In the related art, the air conditioner generally adopts air cooling to dissipate heat of the electric control, the heat dissipation effect is poor at high temperature, the heat generated by the electric control cannot be taken away in time, and the temperature of components is reduced, so that the service life and the reliability of the air conditioner are influenced; meanwhile, for the inverter air conditioner, a higher working frequency cannot be achieved at a high temperature, so that the advantages of the inverter air conditioner cannot be exerted, and the requirements of users are met.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the first purpose of the invention is to provide an air conditioner, which can dissipate heat of electric control of the air conditioner through a refrigerant pipe, take away heat generated by the electric control in time, reduce the temperature of components, and improve the reliability and the service life of the air conditioner; meanwhile, for the variable frequency air conditioner, higher working frequency can be achieved at high temperature, higher power is output, the advantages of the variable frequency air conditioner are exerted, and the requirements of users are met.
The second objective of the present invention is to provide a control method of an air conditioner.
A third object of the present invention is to provide a control apparatus for an air conditioner.
A fourth object of the invention is to propose an electronic device.
A fifth object of the present invention is to propose a computer-readable storage medium.
To achieve the above object, an embodiment of a first aspect of the present invention provides an air conditioner, including:
the outdoor condenser, the indoor evaporator, the first electronic expansion valve, the throttle valve and a refrigerant pipe arranged in the electronic control unit;
the outdoor condenser is communicated with the first end of the refrigerant pipe through the first electronic expansion valve, the indoor evaporator is communicated with the second end of the refrigerant pipe through the throttle valve, the first electronic expansion valve is used for throttling the refrigerant in the heating mode, and the throttle valve is used for throttling the refrigerant in the cooling mode.
According to the air conditioner provided by the embodiment of the invention, the outdoor condenser is communicated with the first end of the refrigerant pipe through the first electronic expansion valve, the indoor evaporator is communicated with the second end of the refrigerant pipe through the throttle valve, the refrigerant pipe is arranged in the electronic control, and the electronic control of the air conditioner is radiated through the refrigerant pipe, so that heat generated by the electronic control can be taken away in time, the temperature of components is reduced, and the reliability and the service life of the air conditioner are improved; meanwhile, for the variable frequency air conditioner, higher working frequency can be achieved at high temperature, higher power is output, the advantages of the variable frequency air conditioner are exerted, and the requirements of users are met.
According to an embodiment of the present invention, the air conditioner further includes: the compressor, the second electronic expansion valve and the plate heat exchanger; the indoor evaporator is communicated with the throttling valve through a first refrigerant branch of the plate heat exchanger, the compressor is communicated with the throttling valve through a second refrigerant branch of the plate heat exchanger and the second electronic expansion valve in sequence, and the second electronic expansion valve is used for throttling the refrigerant in the heating mode.
According to an embodiment of the present invention, the air conditioner further includes: a controller; the controller is configured to: acquiring the outdoor environment temperature after the air conditioner is started in a refrigeration mode; acquiring a corresponding preset current threshold, a preset compressor frequency threshold and a preset current difference threshold according to the outdoor environment temperature; after the compressor is started for a first set time, acquiring the current working current and taking the current working current as a first current; after the compressor is started for a second set time, acquiring the current working current as a second current, and acquiring the current compressor frequency; if the following three conditions are satisfied simultaneously: and if the second current is greater than the preset current threshold value, the difference value between the second current and the first current is greater than the preset current difference value threshold value, and the current compressor frequency is less than the preset compressor frequency threshold value, controlling the air conditioner to stop and exchanging the control strategy of the first electronic expansion valve and the second electronic expansion valve.
According to an embodiment of the present invention, the air conditioner further includes: a four-way valve and a liquid storage tank; the first valve port of the four-way valve is communicated with the outdoor condenser, the second valve port of the four-way valve is communicated with the indoor evaporator, the third valve port of the four-way valve is communicated with the liquid storage tank, the fourth valve port of the four-way valve is communicated with the compressor, and the liquid storage tank is communicated with the compressor.
According to an embodiment of the present invention, the air conditioner further includes: a separator; the liquid storage tank and the compressor are respectively communicated with a fourth valve port of the four-way valve through the separator.
To achieve the above object, a second embodiment of the present invention provides a control method for an air conditioner, which is applied to the air conditioner according to the first embodiment of the present invention, the control method including:
acquiring the outdoor environment temperature after the air conditioner is started in a refrigeration mode;
acquiring a corresponding preset current threshold, a preset compressor frequency threshold and a preset current difference threshold according to the outdoor environment temperature;
after the compressor is started for a first set time, acquiring the current working current and taking the current working current as a first current;
after the compressor is started for a second set time, acquiring the current working current as a second current, and acquiring the current compressor frequency;
if the following three conditions are satisfied simultaneously: and if the second current is greater than the preset current threshold value, the difference value between the second current and the first current is greater than the preset current difference value threshold value, and the current compressor frequency is less than the preset compressor frequency threshold value, controlling the air conditioner to stop and exchanging the control strategy of the first electronic expansion valve and the second electronic expansion valve.
According to the control method of the air conditioner, the outdoor condenser is communicated with the first end of the refrigerant pipe through the first electronic expansion valve, the indoor evaporator is communicated with the second end of the refrigerant pipe through the first refrigerant branch and the throttle valve of the plate heat exchanger in sequence, the refrigerant pipe is arranged in the electric control, the electric control of the air conditioner is radiated through the refrigerant pipe, heat generated by the electric control can be taken away in time, the temperature of components is reduced, and the reliability and the service life of the air conditioner are improved; meanwhile, for the variable frequency air conditioner, higher working frequency can be achieved at high temperature, higher power is output, the advantages of the variable frequency air conditioner are exerted, and the requirements of users are met. In addition, if the following three conditions are satisfied simultaneously: the second current is greater than the preset current threshold value, the difference value between the second current and the first current is greater than the preset current difference value threshold value, and the current compressor frequency is less than the preset compressor frequency threshold value, so that the air conditioner can be controlled to stop and the control strategies of the first electronic expansion valve and the second electronic expansion valve can be exchanged, the air conditioner can still normally operate under the condition that the first electronic expansion valve and the second electronic expansion valve are inserted reversely, and the system reliability is improved.
In order to achieve the above object, a third aspect of the present invention provides a control device for an air conditioner, which is suitable for the air conditioner according to the first aspect of the present invention, and comprises:
the first acquisition module is used for acquiring the outdoor environment temperature after the air conditioner is started in a refrigeration mode;
the second acquisition module is used for acquiring a corresponding preset current threshold, a preset compressor frequency threshold and a preset current difference threshold according to the outdoor environment temperature;
the third acquisition module is used for acquiring the current working current as the first current after the compressor is started for a first set time;
the fourth acquisition module is used for acquiring the current working current as the second current and acquiring the current compressor frequency after the compressor is started for a second set time;
the control module is used for simultaneously meeting the following three conditions: and if the second current is greater than the preset current threshold value, the difference value between the second current and the first current is greater than the preset current difference value threshold value, and the current compressor frequency is less than the preset compressor frequency threshold value, controlling the air conditioner to stop and exchanging the control strategy of the first electronic expansion valve and the second electronic expansion valve.
According to the control device of the air conditioner, the outdoor condenser is communicated with the first end of the refrigerant pipe through the first electronic expansion valve, the indoor evaporator is communicated with the second end of the refrigerant pipe through the first refrigerant branch and the throttle valve of the plate heat exchanger in sequence, the refrigerant pipe is arranged in the electric control, the electric control of the air conditioner is radiated through the refrigerant pipe, heat generated by the electric control can be taken away in time, the temperature of components is reduced, and the reliability and the service life of the air conditioner are improved; meanwhile, for the variable frequency air conditioner, higher working frequency can be achieved at high temperature, higher power is output, the advantages of the variable frequency air conditioner are exerted, and the requirements of users are met. In addition, if the following three conditions are satisfied simultaneously: the second current is greater than the preset current threshold value, the difference value between the second current and the first current is greater than the preset current difference value threshold value, and the current compressor frequency is less than the preset compressor frequency threshold value, so that the air conditioner can be controlled to stop and the control strategies of the first electronic expansion valve and the second electronic expansion valve can be exchanged, the air conditioner can still normally operate under the condition that the first electronic expansion valve and the second electronic expansion valve are inserted reversely, and the system reliability is improved.
To achieve the above object, a fourth aspect of the present invention provides an electronic device, including: the invention also provides a control method of the air conditioner, which comprises a memory, a processor and a computer program stored on the memory and running on the processor, wherein when the processor executes the program, the control method of the air conditioner is realized.
To achieve the above object, a fifth embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement the control method of the air conditioner according to the second embodiment of the present invention.
Drawings
Fig. 1 is a structural view of an air conditioner according to an embodiment of the present invention;
fig. 2 is a structural view of an air conditioner according to another embodiment of the present invention;
fig. 3 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 4 is a structural view of a control apparatus of an air conditioner according to an embodiment of the present invention;
FIG. 5 is a block diagram of an electronic device in accordance with one 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 following describes a control method and device of an air conditioner and the air conditioner in an embodiment of the invention with reference to the accompanying drawings.
Fig. 1 is a structural view of an air conditioner according to an embodiment of the present invention, as shown in fig. 1, the air conditioner including:
an outdoor condenser 11, an indoor evaporator 12, a first electronic expansion valve 15, a throttle valve 16 and a refrigerant pipe 14 arranged in an electronic control unit 13;
the outdoor condenser 11 is communicated with a first end of the refrigerant pipe 14 through a first electronic expansion valve 15, the indoor evaporator 12 is communicated with a second end of the refrigerant pipe 14 through a throttle valve 16, the first electronic expansion valve 15 is used for throttling the refrigerant in the heating mode, and the throttle valve 16 is used for throttling the refrigerant in the cooling mode.
In the embodiment of the invention, the outdoor condenser 11 is communicated with the first end of the refrigerant pipe 14 through the first electronic expansion valve 15, the indoor evaporator 12 is communicated with the second end of the refrigerant pipe 14 through the throttle valve 16, the refrigerant pipe 14 is arranged in the electronic control 13, and the electronic control 13 is radiated through the refrigerant pipe 13, so that heat generated by the electronic control 13 at high temperature can be taken away in time, the temperature of components is reduced, the reliability and the service life of the air conditioner are improved, meanwhile, for the variable frequency air conditioner, higher working frequency can be achieved at high temperature, higher power is output, the advantages of the variable frequency air conditioner are exerted, and the requirements of users are met.
The throttle valve 16 may be a one-way throttle valve. In the heating mode, the refrigerant is throttled by the first electronic expansion valve 15; in the refrigeration mode, the refrigerant is subjected to one-way throttling through the throttling valve 16, condensation of the electronic control unit 13 can be avoided, and therefore reliability of the electronic control unit 13 is improved.
According to the air conditioner provided by the embodiment of the invention, the outdoor condenser is communicated with the first end of the refrigerant pipe through the first electronic expansion valve, the indoor evaporator is communicated with the second end of the refrigerant pipe through the throttle valve, the refrigerant pipe is arranged in the electronic control, and the electronic control of the air conditioner is radiated through the refrigerant pipe, so that heat generated by the electronic control can be taken away in time, the temperature of components is reduced, and the reliability and the service life of the air conditioner are improved; meanwhile, for the variable frequency air conditioner, higher working frequency can be achieved at high temperature, higher power is output, the advantages of the variable frequency air conditioner are exerted, and the requirements of users are met.
Further, as shown in fig. 2, fig. 2 is a structural diagram of an air conditioner according to another embodiment of the present invention, and as shown in fig. 2, on the basis of the embodiment shown in fig. 1, the air conditioner may further include:
a compressor 17, a second electronic expansion valve 18 and a plate heat exchanger 19;
the interior evaporator 12 is communicated with the throttle valve 16 through a first refrigerant branch of the plate heat exchanger 19, the compressor 17 is communicated with the throttle valve 16 through a second refrigerant branch of the plate heat exchanger 19 and a second electronic expansion valve 18 in sequence, and the second electronic expansion valve 18 is used for throttling the refrigerant in the heating mode.
In an embodiment of the present invention, the compressor 17 may specifically be a compressor with enthalpy of injection as shown in fig. 2, and the compressor 17 may include: a compressor discharge 35; a compressor return port 33; compressor enthalpy injection port 34. An exhaust temperature sensor 30 may be provided outside the exhaust pipe of the compressor 17 for detecting the exhaust temperature of the compressor 17. The air conditioner may further include a high voltage switch 29 and a low voltage switch 32, one end of the high voltage switch 29 is embedded inside the exhaust pipe of the compressor 17 for detecting the exhaust pressure and realizing system protection when the pressure is higher than its cut-off value; one end of a low-voltage switch 32 is embedded in the return air pipe of the compressor 17 and used for detecting the return air pressure and realizing system protection when the pressure is lower than the turn-off value of the low-voltage switch.
The plate heat exchanger 19 is used for realizing heat exchange through the refrigerants with different temperatures of the first refrigerant branch and the second refrigerant branch inside the plate heat exchanger in the heating mode, so that the refrigerant of the enthalpy injection port 34 of the compressor is in a gaseous state, and the compressor 17 can greatly improve the output of the heating capacity under a certain condition. An enthalpy injection inlet temperature sensor 27 and an enthalpy injection outlet temperature sensor 28 may be further disposed at an enthalpy injection inlet and an enthalpy injection outlet of the enthalpy injection pipeline (second refrigerant branch) of the plate heat exchanger 19, respectively, and are respectively configured to detect a temperature at the enthalpy injection inlet and a temperature at the enthalpy injection outlet. The second electronic expansion valve 18 is used for throttling the refrigerant in the heating mode, and specifically, the operation can be performed according to the temperature at the enthalpy injection inlet and the temperature at the enthalpy injection outlet.
Further, as shown in fig. 2, on the basis of the embodiment shown in fig. 1, the air conditioner may further include:
a four-way valve 20 and a liquid storage tank 21;
a first port of the four-way valve 20 is communicated with the outdoor condenser 11, a second port of the four-way valve 20 is communicated with the indoor evaporator 12, a third port of the four-way valve 20 is communicated with the liquid storage tank 21, a fourth port of the four-way valve 20 is communicated with the compressor 17, and the liquid storage tank 21 is communicated with the compressor 17.
Further, as shown in fig. 2, on the basis of the embodiment shown in fig. 1, the air conditioner may further include: a separator 22;
the accumulator 21 and the compressor 17 are respectively communicated with the fourth valve port of the four-way valve 20 through a separator 22.
In the embodiment of the present invention, the air conditioner may further include an oil return capillary 31, the separator 22 is configured to separate cold refined oil discharged from the compressor, and the discharged cold refined oil is returned to the compressor 17 through the oil return capillary 31 and the compressor air return pipe under the action of high-low pressure difference, so as to avoid oil shortage of the compressor 17.
Further, as shown in fig. 2, the air conditioner may further include: an outdoor ambient temperature sensor 23; a condenser middle temperature sensor 24; an indoor ambient temperature sensor 25; an evaporator mid-section temperature sensor 26. The condenser middle temperature sensor 24 is arranged on the surface of a copper pipe in the middle of the outdoor condenser 11 and used for detecting the temperature in the middle of the outdoor condenser 11; the outdoor environment temperature sensor 23 is arranged on a fin on the windward side of the outdoor condenser 11 and is used for detecting the outdoor environment temperature; the indoor environment temperature sensor 25 is arranged on a fin on the windward side of the indoor evaporator 12 and used for detecting the indoor environment temperature; the evaporator middle temperature sensor 26 is disposed on the surface of the copper pipe in the middle of the indoor evaporator 12, and is used for detecting the temperature in the middle of the indoor evaporator 12.
The working principle of the air conditioner of the embodiment of the invention is as follows:
(1) when the air conditioner refrigerates, a high-temperature and high-pressure gas refrigerant discharged by a compressor 17 flows through a separator 22 and a four-way valve 20 to the outdoor condenser 11 side for heat dissipation, then flows through a refrigerant pipe 14 in an electronic control unit 13 through a first electronic expansion valve 15 (the opening degree is the maximum at this moment), is throttled through a throttle valve 16 to form a low-temperature and low-pressure refrigerant, flows through a first refrigerant branch of a plate heat exchanger 19 again, enters an indoor evaporator 12 for heat absorption and evaporation, then enters a liquid storage tank 21, and flows into the compressor 17 again for circulation.
(2) When the air conditioner heats, high-temperature and high-pressure gas refrigerant discharged by the compressor 17 flows through the separator 22 and the four-way valve 20 to the side of the indoor evaporator 12 for heat dissipation, then flows into a first refrigerant branch of the plate heat exchanger 19 to the throttle valve 16 (heating is not throttled at this time) and the refrigerant pipe 14 in the electronic control unit 13, is throttled by the first electronic expansion valve 15 to form low-temperature and low-pressure refrigerant, then flows into the outdoor condenser 11 for heat absorption and evaporation, enters the liquid storage tank 21, and then flows into the compressor 17 for circulation. In the heating mode, the plate heat exchanger 19 enables the refrigerant with different temperatures passing through the first refrigerant branch and the second refrigerant branch to realize heat exchange, so that the refrigerant at the enthalpy injection port 34 of the compressor is in a gaseous state, and the compressor 17 can greatly improve the output of the heating capacity under a certain condition.
Further, the air conditioner may further include: a controller to:
acquiring an outdoor environment temperature T4 after the air conditioner is started in a refrigeration mode; acquiring a corresponding preset current threshold I0, a preset compressor frequency threshold F0 and a preset current difference threshold A according to the outdoor environment temperature T4; after the compressor 17 is started for a first set time, acquiring the current working current as a first current I1; after the compressor 17 is started for a second set time, acquiring the current working current as a second current I2, and acquiring the current compressor frequency F; if the following three conditions are satisfied simultaneously: and if the second current I2 is greater than a preset current threshold value I0, the difference value I2-I1 between the second current I2 and the first current I1 is greater than a preset current difference value threshold value A and the current compressor frequency F is less than a preset compressor frequency threshold value F0, controlling the air conditioner to stop and exchanging the control strategies of the first electronic expansion valve 15 and the second electronic expansion valve 18.
In the embodiment of the present invention, a mapping relationship between the outdoor ambient temperature T4 and the preset current threshold I0, the preset compressor frequency threshold F0, and the preset current difference threshold a may be pre-established in the program. After the air conditioner is started in a refrigeration mode, acquiring an outdoor environment temperature T4 through an outdoor environment temperature sensor 23 as shown in FIG. 2, inquiring the mapping relation, and acquiring a preset current threshold I0, a preset compressor frequency threshold F0 and a preset current difference threshold A corresponding to T4; after the compressor 17 is started for a first set time, acquiring the current working current as a first current I1; after the compressor 17 is started for a second set time, acquiring the current working current as a second current I2, and acquiring the current compressor frequency F; if the following three conditions are satisfied simultaneously: i2 > I0, I2-I1 > a, and F < F0, it may be determined that the positions of the first electronic expansion valve 15 and the second electronic expansion valve 18 are reversed, the air conditioner is controlled to stop, and the control strategies of the first electronic expansion valve 15 and the second electronic expansion valve 18 are exchanged through a preset program, where the control strategies are control manners of opening degrees of the first electronic expansion valve 15 and the second electronic expansion valve 18 in a cooling mode or a heating mode, for example, when the control strategy of the first electronic expansion valve 15 is a first opening degree and the control strategy of the second electronic expansion valve 18 is a second opening degree in the current cooling mode, the control strategy of the first electronic expansion valve 15 is exchanged into a second opening degree, and the control strategy of the second electronic expansion valve 18 is exchanged into the first opening degree, so as to ensure normal operation of the air conditioner and improve system reliability.
According to the air conditioner provided by the embodiment of the invention, the outdoor condenser is communicated with the first end of the refrigerant pipe through the first electronic expansion valve, the indoor evaporator is communicated with the second end of the refrigerant pipe through the throttle valve, the refrigerant pipe is arranged in the electronic control, and the electronic control of the air conditioner is radiated through the refrigerant pipe, so that heat generated by the electronic control can be taken away in time, the temperature of components is reduced, and the reliability and the service life of the air conditioner are improved; meanwhile, for the variable frequency air conditioner, higher working frequency can be achieved at high temperature, higher power is output, the advantages of the variable frequency air conditioner are exerted, and the requirements of users are met. In addition, if the following three conditions are satisfied simultaneously: the second current is greater than the preset current threshold value, the difference value between the second current and the first current is greater than the preset current difference value threshold value, and the current compressor frequency is less than the preset compressor frequency threshold value, so that the air conditioner can be controlled to stop and the control strategies of the first electronic expansion valve and the second electronic expansion valve can be exchanged, the air conditioner can still normally operate under the condition that the first electronic expansion valve and the second electronic expansion valve are inserted reversely, and the system reliability is improved.
Fig. 3 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention, which is applied to the air conditioner shown in the above embodiment, as shown in fig. 3, the control method including:
s101, after the air conditioner is started in a refrigeration mode, the outdoor environment temperature is obtained.
And S102, acquiring a corresponding preset current threshold, a preset compressor frequency threshold and a preset current difference threshold according to the outdoor environment temperature.
And S103, after the compressor is started for a first set time, acquiring the current working current and taking the current working current as a first current.
And S104, after the compressor is started for a second set time, acquiring the current working current as a second current, and acquiring the current compressor frequency.
S105, if the following three conditions are simultaneously met: and if the second current is greater than the preset current threshold value, the difference value between the second current and the first current is greater than the preset current difference value threshold value and the current compressor frequency is less than the preset compressor frequency threshold value, controlling the air conditioner to stop and exchanging the control strategy of the first electronic expansion valve and the second electronic expansion valve.
It should be noted that the foregoing explanation of the embodiment of the air conditioner is also applicable to the control method of the air conditioner of this embodiment, and is not repeated herein.
According to the control method of the air conditioner, the outdoor condenser is communicated with the first end of the refrigerant pipe through the first electronic expansion valve, the indoor evaporator is communicated with the second end of the refrigerant pipe through the first refrigerant branch and the throttle valve of the plate heat exchanger in sequence, the refrigerant pipe is arranged in the electric control, the electric control of the air conditioner is radiated through the refrigerant pipe, heat generated by the electric control can be taken away in time, the temperature of components is reduced, and the reliability and the service life of the air conditioner are improved; meanwhile, for the variable frequency air conditioner, higher working frequency can be achieved at high temperature, higher power is output, the advantages of the variable frequency air conditioner are exerted, and the requirements of users are met. In addition, if the following three conditions are satisfied simultaneously: the second current is greater than the preset current threshold value, the difference value between the second current and the first current is greater than the preset current difference value threshold value, and the current compressor frequency is less than the preset compressor frequency threshold value, so that the air conditioner can be controlled to stop and the control strategies of the first electronic expansion valve and the second electronic expansion valve can be exchanged, the air conditioner can still normally operate under the condition that the first electronic expansion valve and the second electronic expansion valve are inserted reversely, and the system reliability is improved.
Fig. 4 is a structural diagram of a control apparatus of an air conditioner according to an embodiment of the present invention, which is applied to the air conditioner shown in the above embodiment, as shown in fig. 4, the control apparatus including:
a first obtaining module 41, configured to obtain an outdoor ambient temperature after the air conditioner is started in a cooling mode;
a second obtaining module 42, configured to obtain a corresponding preset current threshold, a preset compressor frequency threshold, and a preset current difference threshold according to the outdoor environment temperature;
a third obtaining module 43, configured to obtain a current working current as the first current after the compressor is started for a first set time;
a fourth obtaining module 44, configured to obtain a current working current as the second current after the compressor is started for a second set time, and obtain a current compressor frequency;
a control module 45, configured to, if the following three conditions are simultaneously satisfied: and if the second current is greater than the preset current threshold value, the difference value between the second current and the first current is greater than the preset current difference value threshold value and the current compressor frequency is less than the preset compressor frequency threshold value, controlling the air conditioner to stop and exchanging the control strategy of the first electronic expansion valve and the second electronic expansion valve.
It should be noted that the foregoing explanation of the embodiment of the air conditioner is also applicable to the control device of the air conditioner of this embodiment, and details are not repeated here.
According to the control method of the air conditioner, the outdoor condenser is communicated with the first end of the refrigerant pipe through the first electronic expansion valve, the indoor evaporator is communicated with the second end of the refrigerant pipe through the first refrigerant branch and the throttle valve of the plate heat exchanger in sequence, the refrigerant pipe is arranged in the electric control, the electric control of the air conditioner is radiated through the refrigerant pipe, heat generated by the electric control can be taken away in time, the temperature of components is reduced, and the reliability and the service life of the air conditioner are improved; meanwhile, for the variable frequency air conditioner, higher working frequency can be achieved at high temperature, higher power is output, the advantages of the variable frequency air conditioner are exerted, and the requirements of users are met. In addition, if the following three conditions are satisfied simultaneously: the second current is greater than the preset current threshold value, the difference value between the second current and the first current is greater than the preset current difference value threshold value, and the current compressor frequency is less than the preset compressor frequency threshold value, so that the air conditioner can be controlled to stop and the control strategies of the first electronic expansion valve and the second electronic expansion valve can be exchanged, the air conditioner can still normally operate under the condition that the first electronic expansion valve and the second electronic expansion valve are inserted reversely, and the system reliability is improved.
In order to implement the foregoing embodiment, the embodiment of the present invention further provides an electronic device 50, as shown in fig. 5, which includes a memory 51 and a processor 52. The memory 51 stores thereon a computer program operable on the processor 52, and the processor 52 executes the program to implement the control method of the air conditioner as shown in the above embodiments.
In order to implement the above embodiments, an embodiment of the present invention also proposes a non-transitory computer-readable storage medium having stored thereon a computer program that, when executed by a processor, implements the control method of the air conditioner as shown in the above embodiments.
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.
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 (7)
1. An air conditioner, comprising: the outdoor condenser, the indoor evaporator, the first electronic expansion valve, the throttle valve and a refrigerant pipe arranged in the electronic control unit;
the outdoor condenser is communicated with a first end of the refrigerant pipe through the first electronic expansion valve, the indoor evaporator is communicated with a second end of the refrigerant pipe through the throttle valve, the first electronic expansion valve is used for throttling the refrigerant in the heating mode, and the throttle valve is used for throttling the refrigerant in the cooling mode;
further comprising: the compressor, the second electronic expansion valve and the plate heat exchanger;
the indoor evaporator is communicated with the throttling valve through a first refrigerant branch of the plate heat exchanger, the compressor is communicated with the throttling valve through a second refrigerant branch of the plate heat exchanger and the second electronic expansion valve in sequence, and the second electronic expansion valve is used for throttling the refrigerant in the heating mode;
further comprising: a controller; the controller is configured to:
acquiring the outdoor environment temperature after the air conditioner is started in a refrigeration mode;
acquiring a corresponding preset current threshold, a preset compressor frequency threshold and a preset current difference threshold according to the outdoor environment temperature;
after the compressor is started for a first set time, acquiring the current working current and taking the current working current as a first current;
after the compressor is started for a second set time, acquiring the current working current as a second current, and acquiring the current compressor frequency;
if the following three conditions are satisfied simultaneously: and if the second current is greater than the preset current threshold value, the difference value between the second current and the first current is greater than the preset current difference value threshold value, and the current compressor frequency is less than the preset compressor frequency threshold value, controlling the air conditioner to stop and exchanging the control strategy of the first electronic expansion valve and the second electronic expansion valve.
2. The air conditioner according to claim 1, further comprising: a four-way valve and a liquid storage tank;
the first valve port of the four-way valve is communicated with the outdoor condenser, the second valve port of the four-way valve is communicated with the indoor evaporator, the third valve port of the four-way valve is communicated with the liquid storage tank, the fourth valve port of the four-way valve is communicated with the compressor, and the liquid storage tank is communicated with the compressor.
3. The air conditioner according to claim 2, further comprising: a separator;
the liquid storage tank and the compressor are respectively communicated with a fourth valve port of the four-way valve through the separator.
4. A control method of an air conditioner, which is applied to the air conditioner according to claim 1, the control method comprising:
acquiring the outdoor environment temperature after the air conditioner is started in a refrigeration mode;
acquiring a corresponding preset current threshold, a preset compressor frequency threshold and a preset current difference threshold according to the outdoor environment temperature;
after the compressor is started for a first set time, acquiring the current working current and taking the current working current as a first current;
after the compressor is started for a second set time, acquiring the current working current as a second current, and acquiring the current compressor frequency;
if the following three conditions are satisfied simultaneously: and if the second current is greater than the preset current threshold value, the difference value between the second current and the first current is greater than the preset current difference value threshold value, and the current compressor frequency is less than the preset compressor frequency threshold value, controlling the air conditioner to stop and exchanging the control strategy of the first electronic expansion valve and the second electronic expansion valve.
5. A control device of an air conditioner adapted to the air conditioner of claim 1, comprising:
the first acquisition module is used for acquiring the outdoor environment temperature after the air conditioner is started in a refrigeration mode;
the second acquisition module is used for acquiring a corresponding preset current threshold, a preset compressor frequency threshold and a preset current difference threshold according to the outdoor environment temperature;
the third acquisition module is used for acquiring the current working current as the first current after the compressor is started for a first set time;
the fourth acquisition module is used for acquiring the current working current as the second current and acquiring the current compressor frequency after the compressor is started for a second set time;
the control module is used for simultaneously meeting the following three conditions: and if the second current is greater than the preset current threshold value, the difference value between the second current and the first current is greater than the preset current difference value threshold value, and the current compressor frequency is less than the preset compressor frequency threshold value, controlling the air conditioner to stop and exchanging the control strategy of the first electronic expansion valve and the second electronic expansion valve.
6. An electronic device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of controlling an air conditioner as claimed in claim 4 when executing the program.
7. A computer-readable storage medium on which a computer program is stored, characterized in that the program, when executed by a processor, implements the control method of an air conditioner according to claim 4.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910248831.3A CN109945389B (en) | 2019-03-29 | 2019-03-29 | Control method and device of air conditioner and air conditioner |
| PCT/CN2019/098237 WO2020191976A1 (en) | 2019-03-25 | 2019-07-29 | Air conditioner control method and device, and air conditioner |
| CA3134876A CA3134876C (en) | 2019-03-25 | 2019-07-29 | Air conditioner control method and device and air conditioner |
| EP19922216.7A EP3929500B1 (en) | 2019-03-25 | 2019-07-29 | Air conditioner control method and device, and air conditioner |
| ES19922216T ES2948266T3 (en) | 2019-03-25 | 2019-07-29 | Air conditioner control procedure and device, and air conditioner |
| US17/482,927 US20220010979A1 (en) | 2019-03-25 | 2021-09-23 | Air conditioner control method and device and air conditioner |
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| EP3929500B1 (en) * | 2019-03-25 | 2023-05-17 | GD Midea Air-Conditioning Equipment Co., Ltd. | Air conditioner control method and device, and air conditioner |
| CN111486553B (en) * | 2020-03-25 | 2021-08-24 | 海信（山东）空调有限公司 | Air conditioner control method and device, air conditioner and computer storage medium |
| CN111854071A (en) * | 2020-06-09 | 2020-10-30 | 海信（山东）空调有限公司 | Switch input circuit and air conditioner |
| CN114811892A (en) * | 2022-03-31 | 2022-07-29 | 青岛海尔空调器有限总公司 | Variable frequency air conditioner and control method and control device thereof |
| CN115031396A (en) * | 2022-06-28 | 2022-09-09 | 广东美的制冷设备有限公司 | Outdoor unit control method and device of air conditioning system, outdoor unit and air conditioning system |
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| CN104534732A (en) * | 2014-12-02 | 2015-04-22 | 广东美的制冷设备有限公司 | Air conditioner |
| CN106500390A (en) * | 2016-10-09 | 2017-03-15 | 广东美的制冷设备有限公司 | Heating and air conditioner and its control method |
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