CN113513818B - Air conditioner indoor unit control method, air conditioner and computer readable storage medium - Google Patents
Air conditioner indoor unit control method, air conditioner and computer readable storage medium Download PDFInfo
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- CN113513818B CN113513818B CN202110517670.0A CN202110517670A CN113513818B CN 113513818 B CN113513818 B CN 113513818B CN 202110517670 A CN202110517670 A CN 202110517670A CN 113513818 B CN113513818 B CN 113513818B
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- 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
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner indoor unit control method, an air conditioner and a computer readable storage medium. The indoor unit control method comprises the following steps: after the indoor unit is shut down, judging whether the indoor unit is in a heating state before being stopped; and if the indoor unit is in the heating state before stopping, controlling the indoor unit to enter a preheating state. The invention solves the technical problem that warm air cannot be blown out in a short time when an indoor unit is started to perform heating operation under the condition of low temperature or room temperature.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner indoor unit control method, an air conditioner and a computer readable storage medium.
Background
In the prior art, under the condition of low room temperature, when the indoor unit starts heating operation, it takes a long time to heat the indoor heat exchanger and the air around the indoor heat exchanger before the heating operation is started, and in the heating process, the indoor unit blows cold air into the room, thereby reducing the comfort of users.
Disclosure of Invention
The invention solves the technical problem that warm air cannot be blown out in a short time when an indoor unit is started to perform heating operation under the condition of low temperature or room temperature.
In order to solve the problems, the invention provides a control method of an indoor unit of an air conditioner, which comprises the steps of judging whether the indoor unit is in a heating state before stopping after the indoor unit is stopped; and if the indoor unit is in the heating state before stopping, controlling the indoor unit to enter a preheating state.
The technical effect achieved by adopting the technical scheme is as follows: compared with the prior art, the invention controls the indoor unit to enter the preheating state before the indoor unit is started for heating in a low-temperature or room-temperature environment, so that high-temperature warm air can be blown out in a short time after the indoor unit is started for heating, and the comfort level of a user is improved.
In one example of the present invention, determining whether the indoor unit is in a heating state before being stopped includes: when the indoor unit stops running, the indoor temperature T is less than a first room temperature threshold T 1 (ii) a Ambient temperature value T Ring (C) < ambient threshold t Ring (C) (ii) a The indoor unit is in heating operation before stopping operation; and if any one of the conditions is met, controlling the indoor unit to enter the preheating state.
The technical effect achieved by adopting the technical scheme is as follows: the state of the indoor unit before the operation stop can be accurately judged, and the efficiency of the indoor unit entering the preheating state is improved.
In one example of the invention, the indoor unit comprises a high-pressure air pipe, a low-pressure air pipe, an expansion valve, a high-pressure air solenoid valve arranged between the indoor unit and the high-pressure air pipe, and a low-pressure air solenoid valve arranged between the indoor unit and the low-pressure air pipe; when the indoor unit enters the preheating state, opening the high-pressure gas electromagnetic valve and the expansion valve, and closing the low-pressure gas electromagnetic valve, wherein the opening degree of the expansion valve is K; wherein, the maximum opening degree of the expansion valve is A, and K is 10% A.
The technical effect achieved by adopting the technical scheme is as follows: the indoor heat exchanger in the indoor unit has the advantages that the surrounding temperature of the indoor heat exchanger in the indoor unit is the same as the high-temperature high-pressure air temperature, so that when the indoor unit is started to heat, high-temperature warm air can be blown out in a short time, and the heating efficiency and the comfort of a user are improved.
In one example of the invention, if the indoor unit is in a non-heating state before stopping, the indoor unit is controlled to be in a normal state after being stopped; the normal state includes: closing the high pressure gas solenoid valve and the expansion valve, and opening the low pressure gas solenoid valve.
The technical effect achieved by adopting the technical scheme is as follows: the state of the indoor unit before stopping is accurately judged, so that after the indoor unit enters the conventional state, the working process of the indoor unit is started, and the reduction of user experience caused by the blowing of high-temperature warm air is avoided.
In an example of the present invention, after the indoor unit enters the preheating state, the method further includes: s1: measuring the indoor temperature T and the second room temperature threshold value T 2 If T is greater than or equal to T 2 Controlling the indoor unit to enter a normal state; if T is less than T 2 The method also comprises the following steps: s2: measuring ambient temperature value T Ring(s) And a first environment threshold t Ring 1 If T is Ring (C) ≥t Ring 1 And controlling the indoor unit to enter a normal state.
The technical effect achieved by adopting the technical scheme is as follows: by setting the second room temperature threshold t 2 Comparing the measured actual indoor temperature T to check the preheating effect of the preheating state, i.e. checking whether the temperature around the indoor heat exchanger reaches or exceeds T by the preheating effect 2 The value of (2) is used for avoiding that the poor preheating effect cannot be found in time, so that the user experience is reduced in the heating process of the indoor unit; furthermore, when T < T 2 Under the condition of (1), when T is Ring (C) ≥t Ring 1 When the temperature value T meets the first environmental threshold T Ring 1 From the preheating state to the normal state.
In one embodiment of the invention, if T Ring(s) ＜t Ring 1 The method also comprises the following steps: a: the exhaust superheat degree is increased to be above a preset value; b: the suction superheat degree is increased to be higher than a preset value; c: the supercooling degree of the liquid pipe is reduced to a preset value; if any one of a, b or c is satisfied, judging that the air-conditioning refrigerant is insufficient; if the air-conditioning refrigerant is sufficient, the indoor unit is controlled to execute the step S1.
The technical effect achieved by adopting the technical scheme is as follows: the specific situation of the liquid refrigerant quantity of the indoor heat exchanger can be accurately judged, so that the indoor unit can respond in time.
In an embodiment of the present invention, if it is determined that the air-conditioning refrigerant is insufficient, the indoor unit in the preheating state is caused to perform any one of the following operations; maintaining the opening degree of the expansion valve in a state of K =30% a; and closing the expansion valve, opening the low-pressure gas electromagnetic valve and closing the high-pressure gas electromagnetic valve.
The technical effect achieved by adopting the technical scheme is as follows: the liquid refrigerant retention of the indoor heat exchanger can be prevented from increasing, so that the preheating effect is prevented from being reduced due to insufficient refrigerant in the circulation process.
In an embodiment of the present invention, the indoor unit enters the normal state, and determines the indoor temperature T and the first room temperature threshold T 1 If T < T 1 And controlling the indoor unit to enter the preheating state.
The technical effect achieved by adopting the technical scheme is as follows: the conversion between the preheating state and the conventional state is realized, and the energy consumption is reduced.
In one embodiment of the present invention, if T ≧ T 1 Then measure the ambient temperature value T at that time Ring (C) And an environmental threshold t Ring 2 If T is Ring (C) ＜t Ring 2 Controlling the indoor unit to enter the preheating state; wherein if T Ring(s) ≥t Ring 2 Then controlling the indoor unit to adjust the T and T of the indoor unit at the moment 1 Continuously comparing the sizes; if T is less than T 1 And controlling the indoor unit to enter the preheating state.
The technical effect achieved by adopting the technical scheme is as follows: the conversion between the preheating state and the conventional state is realized, and the energy consumption is further reduced on the premise of ensuring the preheating effect.
The present invention also provides an air conditioner including: the detection unit is used for detecting the temperature of the current environment and the indoor temperature; and the control unit is used for controlling whether the indoor unit enters a preheating state or not according to the temperature value of the current environment and the current indoor temperature value.
The technical effect achieved by adopting the technical scheme can be achieved by adopting any one of the embodiments, and the details are not repeated here.
The invention also provides another air conditioner, which comprises a computer storage medium for storing a computer program and a processor, wherein the computer program is read by the processor and run to realize the indoor unit control method.
The invention also provides a computer-readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the method for controlling the indoor unit is realized.
After the technical scheme of the invention is adopted, the following technical effects can be achieved:
(1) on one hand, compared with the prior art, the invention leads the indoor unit to be additionally provided with a preheating state after being shut down, namely, the indoor unit can blow out warm air in a short time in the heating process when being started under the environment of low temperature or room temperature, thereby improving the comfort level of users; on the other hand, the indoor unit is controlled to be capable of switching between the preheating state and the conventional state, and on the premise that the preheating effect is guaranteed, the energy consumption is further reduced.
(2) On one hand, whether the air-conditioning refrigerant is sufficient or not is monitored by detecting the exhaust superheat degree or the suction superheat degree or the liquid pipe supercooling degree and comparing the exhaust superheat degree or the suction superheat degree or the liquid pipe supercooling degree with respective preset values; on the other hand, on the premise of insufficient refrigerant of the air conditioner, the opening degree of the expansion valve is increased in time, or the expansion valve is completely closed, the high-pressure gas electromagnetic valve is closed, and the low-pressure gas electromagnetic valve is opened, so that liquid-air refrigerant is prevented from being retained in the indoor heat exchanger, and the amount of the refrigerant participating in the circulation process is increased.
Drawings
Fig. 1 is a schematic diagram illustrating a state of an indoor unit 100 after shutdown in the prior art.
Fig. 2 is a schematic diagram of an indoor unit 100 provided in fig. 1 after entering a preheating state according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an internal structure of a central air conditioner according to the present invention.
Fig. 4 is a schematic flow chart illustrating a method for controlling an indoor unit of an air conditioner according to the present invention.
Description of reference numerals:
100-indoor unit; 10-indoor heat exchanger; 20-low pressure gas pipe; 30-low pressure gas solenoid valve; 40-high pressure gas solenoid valve; 50-high pressure air pipe; 60-liquid tube; 70-an expansion valve; 80-compressor.
Detailed Description
Referring to fig. 1, a schematic diagram of a state of an indoor unit 100 after shutdown in the prior art is shown. In order to prevent a part of the liquid refrigerant from staying in the indoor heat exchanger 10 of the indoor unit 100, the expansion valve 70 of the indoor unit 100 is fully closed, the low pressure solenoid valve 30 is opened, and the high pressure solenoid valve 40 is closed to make the interior of the indoor heat exchanger 10 a low pressure gas, so that the part of the liquid refrigerant staying in the indoor heat exchanger 10 is delivered to the outdoor unit.
In the above operation process, although the liquid refrigerant is prevented from being retained in the indoor heat exchanger 10, the temperature of the indoor heat exchanger 10 and the ambient temperature is the same as the room temperature, so that in a low-temperature or room-temperature environment, when the indoor unit 100 starts to perform a heating operation, cold air close to the room temperature is blown out at the first time, which results in a reduction in user comfort. That is, in the conventional technology, when the indoor unit 100 starts heating, it takes time to heat the indoor heat exchanger 10 and the air around it before starting the heating operation, and warm air cannot be blown out in a short time.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The first embodiment is as follows:
referring to fig. 2-4, fig. 4 is a schematic flow chart of an indoor unit control method according to an embodiment of the present invention. Specifically, after the indoor unit 100 is stopped, it is determined whether the indoor unit 100 is in a heating state before the indoor unit 100 is stopped, wherein if the indoor unit 100 is in the heating state before the indoor unit 100 is stopped, the indoor unit 100 is controlled to enter a preheating state.
Further, it is determined whether the indoor unit 100 is in the heating state before stopping, and the specific determination conditions include: when the indoor unit 100 stops operating, the indoor temperature T is less than the first room temperature threshold T 1 Or ambient temperature value T Ring (C) < ambient threshold t Ring (C) Or the indoor unit 100 is in the heating operation before stopping the operation. If any one of the above conditions is satisfied, the indoor unit 100 may enter the preheating state. Specifically, when the indoor unit 100 stops operating, the indoor temperature T is less than the first room temperature threshold T 1 The method specifically comprises the following steps: when the indoor unit 100 stops operating, the indoor temperature T does not satisfy the preset temperature, or when the indoor unit 100 in the cooling operation is in a stopped state.
For example, in a heating operation process, the indoor unit 100 may set the first room temperature threshold T in a stable state 1 At 20 ℃ and T is more than or equal to 20 ℃. After the operation of the indoor unit is stopped, because the indoor unit 100 does not provide warm air for the indoor, the indoor temperature T is changed in a descending manner, and when the indoor temperature T is less than 20 ℃, the indoor unit 100 can be judged to be in heating operation before being stopped; in addition, the ambient temperature T can be collected by the temperature sensing element of the outdoor unit Ring (C) When the ambient temperature value T Ring(s) Not less than the environmental threshold t Ring (C) ，T Ring (C) E.g. at 25 deg.C, t Ring (C) At 20 c, the indoor unit 100 obviously does not perform the heating operation, whereas T is the opposite Ring (C) ＜t Ring (C) If the indoor unit 100 is in the preheating state, the indoor unit 100 is controlled to enter the preheating state after being stopped.
Further, the air conditioner includes, for example, a high pressure air pipe 50, a low pressure air pipe 20, an expansion valve 70, a high pressure air solenoid valve 40 provided between the indoor unit 100 and the high pressure air pipe 50, and a low pressure air solenoid valve 30 provided between the indoor unit 100 and the low pressure air pipe 20. When the indoor unit 100 enters the preheating state, the high pressure gas solenoid valve 40 and the expansion valve 70 are opened, and the low pressure gas solenoid valve 30 is closed. At this time, the opening degree of the expansion valve 70 is set to K, where the maximum opening degree of the expansion valve 70 is a, and K is set to 10% a. Therefore, a small amount of high-pressure air can enter the indoor unit 100, and the indoor heat exchanger 10 of the indoor unit 100 and its surrounding environment are in a high-temperature state, so that warm air can be blown out in a short time when the indoor unit 100 starts heating operation under the condition of room temperature or low-temperature environment, thereby improving the comfort of users.
Further, if the indoor unit 100 is in the non-heating state before being stopped, the indoor unit 100 is stopped and then enters the normal state. Specifically, the normal state includes, for example: the high pressure gas solenoid valve 40 and the expansion valve 70 are closed and the low pressure gas solenoid valve 30 is opened.
Further, after the indoor unit 100 enters the preheating state, the method further includes: s1: measuring the room temperature value, the room temperature T and a second room temperature threshold value T 2 If T is greater than or equal to T 2 The indoor unit 100 is brought into a normal state.
In one embodiment, when it is judged that the heating operation is performed before the indoor unit 100 is stopped, the indoor unit 100 may be brought into a preheating state, assuming that T is 30 ℃ after the preheating operation, and T is Ring 2 At 25 ℃, T is more than or equal to T Ring 2 And it is established such that the indoor unit 100 switches the state at this time to enter the normal state. Subsequently, T changes, and the indoor temperature sensing element and T are connected together Ring 1 Making a comparison, t Ring 1 For example 20 deg.C, when T < T Ring 1 Then, the indoor unit 100 is switched to the preheating state, and then T and T at that moment are added Ring 2 And comparing to judge whether the normal state is entered.
Further, when T < T 2 The method also comprises the following steps: s2: measuring ambient temperature value T Ring (C) And a first environmental threshold t Ring 1 If T is Ring (C) ≥t Ring 1 The indoor unit 100 is brought into the normal state.
Further, when the indoor unit 100 enters the preheating state, T is set Ring(s) ＜t Ring 1 And then, includes: a: the exhaust superheat degree is increased to be higher than a preset value; b: the suction superheat degree is increased to be above a preset value; c: supercooling degree of liquid pipe aAs little as the preset value. When the refrigerant satisfies any one of the a, the b or the c, judging that the refrigerant of the air conditioner is insufficient; if the air-conditioning refrigerant is sufficient, the indoor unit 100 proceeds to step S1.
Specifically, when the air-conditioning refrigerant is judged to be insufficient, the indoor unit 100 in the preheating state is caused to perform any one of the following operations:
the method comprises the following steps: the opening degree of the expansion valve 70 is increased, and may be maintained at K =30% a, for example;
the second method comprises the following steps: the expansion valve 70 is closed, the low pressure gas solenoid valve 30 is opened, and the high pressure gas solenoid valve 40 is closed.
By performing the first or second method, the liquid refrigerant is prevented from being retained in the indoor heat exchanger 10, and the circulation efficiency of the liquid refrigerant is improved.
Further, the indoor unit 100 enters the normal state, and determines the indoor temperature T and the first room temperature threshold T 1 If T < T 1 The indoor unit 100 is caused to enter the warm-up state.
Further, if T is more than or equal to T 1 Detecting the ambient temperature value T at the moment Ring (C) And an environment threshold t Ring 2 If T is Ring (C) ＜t Ring 2 Then, the indoor unit 100 enters the preheating state; wherein, if T Ring (C) ≥t Ring 2 Then let the indoor unit 100 to compare T and T at this time 1 Continuously comparing the sizes; if T is less than T 1 And controls the indoor unit 100 to enter the preheating state.
Referring to fig. 3, in an embodiment, the central air conditioner may include an outdoor unit and a plurality of indoor units. The plurality of indoor units are, for example, three indoor units 100. Each indoor unit 100 is connected to the outdoor unit in the same manner. Three pipelines are connected between the outdoor unit and each indoor unit 100, and the three pipelines are a low-pressure air pipe 20, a high-pressure air pipe 50 and a liquid pipe 60. Wherein, the low-pressure air pipe 20 is provided with a low-pressure air electromagnetic valve 30; the high-pressure air pipe 50 is provided with a high-pressure air electromagnetic valve 40; an expansion valve 70 is provided on the liquid pipe 60.
The process of heating the indoor by the central air conditioner will be described in detail as follows: the system directly conveys high-temperature and high-pressure gaseous refrigerants compressed by the compressor 80 to the corresponding indoor unit 100 along the high-pressure air pipe 50 through the conversion of the electric four-way valve, the high-temperature and high-pressure gaseous refrigerants absorb indoor cold air and are converted into low-temperature and high-pressure refrigerants through the heat dissipation effect of the indoor unit 100, and further the corresponding indoor heating effect is realized, moreover, the low-temperature and high-pressure refrigerants enter the liquid pipe 60 connected with the corresponding indoor unit 100, are converted into low-temperature and low-pressure liquid refrigerants through the pressure reduction effect of the expansion valve 70 on the liquid pipe 60, enter the outdoor unit and absorb heat, and are further converted into low-temperature and low-pressure gaseous refrigerants, the low-temperature and low-pressure gaseous refrigerants enter the compressor again to be compressed to form high-temperature and high-pressure gaseous refrigerants, and the processes are repeatedly circulated, so that the corresponding indoor heating effect is realized.
In contrast, the cooling process of the central air conditioner is the same as the heating principle, and is not described herein again.
Example two:
the present invention also provides an air conditioner including the indoor unit 100. The indoor unit 100 includes, for example, a detection unit and a control unit. The detection unit is used for detecting the temperature of the current environment and the indoor temperature; and the control unit is used for controlling whether the indoor unit enters a preheating state or not according to the temperature value of the current environment and the current indoor temperature value.
Example three:
the present invention further provides another air conditioner, which includes a computer storage medium storing a computer program and a processor, wherein the computer program is read and executed by the processor to implement the indoor unit control method according to the first embodiment.
Example four:
the invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is read and executed by a processor, the method for controlling an indoor unit according to the first embodiment is implemented.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Claims (8)
1. A control method of an indoor unit of an air conditioner is characterized in that,
when the indoor unit (100) is stopped, judging whether the indoor unit (100) is in a heating state before stopping; the judging whether the indoor unit (100) is in the heating state before stopping includes: when the indoor unit (100) stops operating, the indoor temperature T is less than the first room temperature threshold T 1 (ii) a Ambient temperature value T Ring(s) < ambient threshold t Ring (C) (ii) a The indoor unit (100) is in heating operation before stopping operation; if any one of the conditions is met, controlling the indoor unit (100) to enter a preheating state;
when the indoor unit (100) enters the preheating state, the method further comprises the following steps:
s1: measuring the indoor temperature T and the second room temperature threshold value T 2 If T is greater than or equal to T 2 Controlling the indoor unit (100) to enter a normal state; if T is less than T 2 The method also comprises the following steps:
s2: measuring ambient temperature value T Ring(s) And a first environment threshold t Ring 1 If T is Ring(s) ≥t Ring 1 Controlling the indoor unit to enter the normal state;
the air conditioner comprises a high-pressure air pipe (50), a low-pressure air pipe (20), an expansion valve (70), a high-pressure air solenoid valve (40) arranged between the indoor unit (100) and the high-pressure air pipe (50), and a low-pressure air solenoid valve (30) arranged between the indoor unit (100) and the low-pressure air pipe (20), wherein when the indoor unit (100) enters the preheating state, the high-pressure air solenoid valve (40) and the expansion valve (70) are opened, the low-pressure air solenoid valve (30) is closed, and the opening degree of the expansion valve (70) is K; wherein the maximum opening degree of the expansion valve (70) is A, and K is 10% A;
if the indoor unit (100) is in a non-heating state before stopping, controlling the indoor unit (100) to enter a normal state after stopping; the normal state includes: closing the high pressure gas solenoid valve (40) and the expansion valve (70), and opening the low pressure gas solenoid valve (30).
2. The control method of an indoor unit of an air conditioner according to claim 1, wherein if T is T Ring (C) ＜t Ring 1 The method also comprises the following steps:
a: the exhaust superheat degree is increased to be above a preset value;
b: the suction superheat degree is increased to be higher than a preset value;
c: the supercooling degree of the liquid pipe is reduced to a preset value;
if the refrigerant satisfies any one of a, b or c, judging that the air-conditioning refrigerant is insufficient; if the air-conditioning refrigerant is sufficient, the indoor unit is controlled to execute the step S1.
3. The indoor unit control method of claim 1, wherein if the air-conditioning refrigerant is judged to be insufficient, the indoor unit (100) in the preheating state is controlled to perform any one of the following operations:
maintaining the opening degree of the expansion valve (70) in a state of K =30% A;
closing the expansion valve (70), opening the low pressure gas solenoid valve (30), closing the high pressure gas solenoid valve (40).
4. The indoor unit control method of claim 1, wherein when the indoor unit (100) enters the normal state, the indoor temperature T and the first room temperature threshold T are determined 1 If T < T 1 And controlling the indoor unit (100) to enter the preheating state.
5. The control method for an indoor unit of an air conditioner according to claim 4, wherein if T ≧ T 1 Detecting the ambient temperature value T Ring (C) And an environment threshold t Ring 2 If T is Ring (C) ＜t Ring 2 Then the indoor unit (100) is controlled to enter the preheating stateState;
wherein, if T Ring (C) ≥t Ring 2 Then controlling the indoor unit (100) to adjust the indoor temperature T and T 1 Continuously comparing the sizes; if T is less than T 1 And controlling the indoor unit (100) to enter the preheating state.
6. An air conditioner comprising an indoor unit (100), characterized in that the indoor unit (100) comprises:
the detection unit is used for detecting the temperature of the current environment and the indoor temperature;
the control unit is used for controlling whether the indoor unit (100) enters a preheating state or not according to the temperature value of the current environment and the current indoor temperature value;
wherein the judging whether the indoor unit (100) is in a heating state before stopping includes: when the indoor unit (100) stops operating, the indoor temperature T is less than the first room temperature threshold T 1 (ii) a Ambient temperature value T Ring (C) < ambient threshold t Ring(s) (ii) a The indoor unit (100) is in heating operation before stopping operation; if any one of the conditions is met, controlling the indoor unit (100) to enter the preheating state;
when the indoor unit (100) enters the preheating state, the method further comprises the following steps:
s1: measuring the indoor temperature T and the second room temperature threshold value T 2 If T is greater than or equal to T 2 Controlling the indoor unit (100) to enter a normal state; if T is less than T 2 The method also comprises the following steps:
s2: measuring ambient temperature value T Ring (C) And a first environment threshold t Ring 1 If T is Ring (C) ≥t Ring 1 And controlling the indoor unit to enter the normal state.
7. An air conditioner comprising a computer storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the method of controlling an indoor unit of an air conditioner according to any one of claims 1 to 5.
8. A computer-readable storage medium, wherein a computer program is stored, and when the computer program is read and executed by a processor, the computer program implements the method for controlling an indoor unit of an air conditioner according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110517670.0A CN113513818B (en) | 2021-05-12 | 2021-05-12 | Air conditioner indoor unit control method, air conditioner and computer readable storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110517670.0A CN113513818B (en) | 2021-05-12 | 2021-05-12 | Air conditioner indoor unit control method, air conditioner and computer readable storage medium |
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