Control method and control device of air conditioner and air conditioner

Abstract

The invention relates to the technical field of air conditioners, in particular to a control method and a control device of an air conditioner and the air conditioner, and aims to solve the problems that in order to realize refrigeration starting of the air conditioner in a high-temperature environment, shutdown protection is usually started when the load of a compressor is too high, or the opening degree of an electronic expansion valve is opened to the maximum to achieve a pressure relief effect; however, the two modes cannot realize the dynamic balance between the system pressure and the refrigeration effect. In order to achieve the purpose, the control method of the air conditioner comprises the step that in a high-temperature refrigeration mode, the opening degree of an electronic expansion valve is adjusted according to the size of current actual phase current I actual. After the air conditioner enters the high-temperature refrigeration mode, the opening degree of the electronic expansion valve is adjusted according to the size of the current actual phase current, and therefore the system pressure, the phase current value and the outlet air temperature can be adjusted, the air conditioner further has the refrigeration effect on the premise that the air conditioner does not stop, and dynamic balance of the system pressure and the refrigeration effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and specifically provides a control method and a control device of an air conditioner, and an air conditioner. Background Art

[0002] An air conditioner is a device that uses artificial means to adjust and control the temperature, humidity, flow rate and other parameters of the ambient air in a building or structure, and can provide users with a more comfortable environment. The air conditioner consists of a refrigerant circulation system through a compressor, condenser, electronic expansion valve and evaporator, and uses the phase change of the refrigerant to achieve the cooling and heating functions of the air conditioner. Among them, the air conditioner starts the cooling function in a high temperature environment, which is one of its important design functions. However, under this starting condition, the overall pressure of the air conditioner is relatively large, and the load of the compressor also increases, which is easy to cause the demagnetization of the compressor and damage the compressor. In order to ensure that the air conditioner can operate normally and reliably, many protection measures need to be added to the air conditioning system.

[0003] In order to realize the cooling start of the air conditioner in a high temperature environment, the prior art usually sets the shutdown protection to start when the load of the compressor is too high. As the load of the compressor increases, the phase current value increases, and the compressor shutdown protection is triggered when the phase current reaches the threshold. Alternatively, the opening of the electronic expansion valve is opened to the maximum to achieve the pressure relief effect, so that the compressor can continue to run, but these two methods cannot achieve a dynamic balance between the system pressure and the cooling effect.

[0004] Accordingly, the art requires a new air conditioner control method, control device and air conditioner to solve the above problems. Summary of the invention

[0005] The present invention aims to solve the above technical problem, that is, to solve the problem that in order to realize refrigeration start of the air conditioner in a high temperature environment, it is usually set to start the shutdown protection when the load of the compressor is too high, or the opening of the electronic expansion valve is opened to the maximum to achieve a pressure relief effect so that the compressor can continue to run, but these two methods cannot achieve a dynamic balance between the system pressure and the refrigeration effect.

[0006] In a first aspect, the present invention provides a control method for an air conditioner; the air conditioner comprises an electronic expansion valve;

[0007] The control method comprises the following steps:

[0008] In high temperature cooling mode, according to the actual phase current I 实 The size of the electronic expansion valve is used to adjust the opening of the electronic expansion valve.

[0009] When the above technical solution is adopted, the air conditioner adjusts the opening of the electronic expansion valve according to the current actual phase current in the high-temperature cooling mode, thereby adjusting the system pressure, phase current value and outlet air temperature, so that the air conditioner can still have a cooling effect without stopping. A dynamic balance between system pressure and cooling effect is achieved, so that the air conditioner can operate more safely and stably, while providing a more comfortable cooling effect.

[0010] In the preferred technical solution of the control method of the air conditioner, "adjusting the opening of the electronic expansion valve according to the current actual phase current I1" specifically includes:

[0011] If the actual phase current I 实 ≥ the maximum phase current Imax, and continue for a preset time, increasing the opening of the electronic expansion valve.

[0012] When the above technical solution is adopted, when the current actual phase current is greater than or equal to the maximum phase current and lasts for a preset time, the phase current value is reduced by increasing the opening of the electronic expansion valve and reducing the system pressure, and the air conditioner can operate stably. At this time, although the outlet temperature increases, it still has a certain cooling effect.

[0013] In the preferred technical solution of the control method of the air conditioner, “increasing the opening of the electronic expansion valve” specifically includes:

[0014] The target opening degree P of the electronic expansion valve 目 =P 实 +△P2;

[0015] Among them, P 实 is the actual opening of the electronic expansion valve, and ΔP2 is the preset opening.

[0016] When the above technical solution is adopted, when the electronic expansion valve is adjusted to increase, the actual opening of the electronic expansion valve is adjusted according to this formula, so that the opening of the electronic expansion valve can be controlled more accurately and reasonably, so that the system pressure is reduced while the air conditioner still has a certain cooling effect.

[0017] In the preferred technical solution of the air conditioner control method, the size of ΔP2 is an integer between 10 and 50 pulses.

[0018] When the above technical solution is adopted, the range of ΔP2 is determined according to experiments or experience, and the specific value of ΔP2 is determined according to actual working conditions, so that the air conditioner can run more smoothly after the opening of the electronic expansion valve is increased.

[0019] In the preferred technical solution of the control method of the air conditioner, "adjusting the opening of the electronic expansion valve according to the current actual phase current I1" specifically includes:

[0020] If the actual phase current I 实 <maximum phase current Imax and lasts for a preset time, reducing the opening of the electronic expansion valve.

[0021] When the above technical solution is adopted, when the current actual phase current is less than the maximum phase current and lasts for a preset time, the opening of the electronic expansion valve is reduced, the system pressure is increased, the phase current value is increased, the air outlet temperature is reduced, and the cooling effect of the air conditioner is improved.

[0022] In the preferred technical solution of the control method of the air conditioner, “reducing the opening of the electronic expansion valve” specifically includes:

[0023] The target opening degree P of the electronic expansion valve 目 =P 实 -△P1;

[0024] Among them, P 实 is the actual opening of the electronic expansion valve, ΔP1 is based on P 实 and target exhaled air temperature Tp 目 Sure.

[0025] When the above technical solution is adopted, when the electronic expansion valve is adjusted to decrease, the actual opening of the electronic expansion valve is adjusted according to this formula, so that the opening of the electronic expansion valve can be controlled more accurately and reasonably, the system pressure can be increased, and the cooling effect of the air conditioner can be improved.

[0026] In the preferred technical solution of the above air conditioner control method, "△P1 is based on P 实 and target exhaled air temperature Tp 目 "Confirmation" specifically includes:

[0027] Target exhaled air temperature Tp 目 =To+△T;

[0028] Where To is the outdoor ambient temperature, △T is the preset temperature;

[0029] Get data 实 With Tp 目 The difference between

[0030] Use the difference to get a positive integer N;

[0031] △P1=N.

[0032] When the above technical solution is adopted, the target exhalation temperature is dynamically adjusted according to the change of the outdoor ambient temperature, and then △P1 is dynamically determined according to the difference between the actual opening of the electronic expansion valve and the target exhalation temperature, and then the target opening of the electronic expansion valve is dynamically adjusted, so that the opening of the electronic expansion valve can be related to the outdoor ambient temperature, so that the air conditioner can be more adapted to operate stably in a high temperature environment and provide a good cooling effect.

[0033] In the preferred technical solution of the control method of the air conditioner, when the outdoor ambient temperature To≥the first preset temperature and the indoor ambient temperature Tr≥the second preset temperature, the air conditioner enters the high-temperature cooling mode.

[0034] When the above technical solution is adopted, whether the air conditioner enters the high-temperature cooling mode can be determined more accurately according to the outdoor ambient temperature and the indoor ambient temperature.

[0035] In a second aspect, the present invention provides a control device for an air conditioner; the control device comprises a processor and a memory storing program instructions, and the processor is configured to execute the control method for the air conditioner as described above when running the program instructions.

[0036] In the case of adopting the above technical solution, the control method of the air conditioner is stored in the storage device, and the high-temperature cooling control method is run by the processor, so that the air conditioner enters the high-temperature cooling mode when it detects that the outdoor ambient temperature and the indoor ambient temperature have reached high temperatures and the air conditioner is running for cooling. By running the high-temperature cooling control method, the air conditioner can have a cooling effect without stopping, and a dynamic balance between the system pressure and the cooling effect is achieved, so that the air conditioner can operate more safely and stably, while providing a more comfortable cooling effect.

[0037] In a third aspect, the present invention provides an air conditioner; the air conditioner comprises the control device of the air conditioner as described above;

[0038] a first temperature detection element, the first temperature detection element being used to detect the outdoor ambient temperature and transmit the outdoor ambient temperature information to the control device;

[0039] a second temperature detection element, the second temperature detection element being used to detect the indoor ambient temperature and transmit the indoor ambient temperature information to the control device;

[0040] a third temperature detection element, the third temperature detection element being used to detect the actual exhaled air temperature and transmit the actual exhaled air temperature information to the control device;

[0041] A current collection component, the current collection component is used to collect phase current values ​​and transmit the phase current value information to the control device;

[0042] An electronic expansion valve is communicatively connected with the control device.

[0043] When the above technical solution is adopted, the detected information is transmitted to the control device through the first temperature detection device, the second temperature detection device, the third temperature detection device and the current acquisition device, and the electronic expansion valve transmits the actual opening information to the control device, so that the control device can adjust the opening of the electronic expansion valve according to the high-temperature refrigeration control method, so that the air conditioner can achieve a dynamic balance between the system pressure and the refrigeration effect under the high-temperature refrigeration condition, so that the air conditioner can operate more safely and stably, and at the same time provide a more comfortable refrigeration effect.

[0044] In summary, the present invention has at least the following beneficial effects:

[0045] 1. In high-temperature cooling mode, the air conditioner adjusts the opening of the electronic expansion valve according to the current actual phase current, thereby adjusting the system pressure, phase current value and outlet air temperature, so that the air conditioner can still have a cooling effect without stopping. A dynamic balance between system pressure and cooling effect is achieved, so that the air conditioner can operate more safely and stably, while providing a more comfortable cooling effect.

[0046] 2. According to the outdoor ambient temperature and indoor ambient temperature, determine whether the air conditioner enters the high temperature cooling mode. In the high temperature cooling mode, if the current actual phase current I 实 < maximum phase current Imax, and lasts for a preset time, dynamically adjust the target exhalation temperature Tp according to the outdoor ambient temperature 目 , due to the actual exhaled air temperature Tp 实 <Target exhalation temperature Tp 目 , the electronic expansion valve will slowly close and decrease, and the opening of the electronic expansion valve will be adjusted according to P 目 =P 实 -△P1 is reduced, according to P 实 With Tp 目 The difference is a positive integer N, △P1 = N. This can increase the system pressure, increase the phase current value, and reduce the outlet temperature, which has a good cooling effect. 实 ≥ Maximum phase current Imax, and lasts for a preset time, according to P 目 =P 实 +△P2, increase the opening of the electronic expansion valve, thereby reducing the system pressure, reducing the phase current value, and the air conditioner can operate stably. At this time, although the air outlet temperature increases, it still has a certain cooling effect.

[0047] 3. By taking the outdoor ambient temperature, indoor ambient temperature, phase current value and actual air discharge temperature as parameter values, controlling the target air discharge temperature and the opening of the electronic expansion valve, the air conditioner can have a cooling effect without stopping, thus achieving a dynamic balance between system pressure and cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0049] Figure 1 is a flow chart of the main steps of the control method of the air conditioner of the present invention;

[0050] Figure 2 It is a flow chart of the specific steps of the control method of the air conditioner of the present invention. DETAILED DESCRIPTION

[0051] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0052] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0053] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] Embodiment 1

[0055] In order to achieve the cooling start of the air conditioner in a high temperature environment, it is usually set to start the shutdown protection when the compressor load is too high. As the compressor load increases, the phase current value increases, and the compressor shutdown protection is triggered when the phase current reaches the threshold. Or the opening of the electronic expansion valve is opened to the maximum to achieve the pressure relief effect, so that the compressor can continue to run, but these two methods cannot achieve the problem of dynamic balance between system pressure and cooling effect.

[0056] This embodiment discloses an air conditioner, which includes a control device, a refrigerant circulation pipeline, a compressor installed on the refrigerant circulation pipeline, an outdoor heat exchanger, a four-way valve, an electronic expansion valve and an indoor heat exchanger. The cooling and heating cycle includes a series of processes involving compression, condensation, expansion and evaporation to cool or heat the indoor space.

[0057] When the air conditioner is cooling, the gaseous refrigerant is pressurized by the compressor to become a high-temperature and high-pressure gas. The four-way valve controls the refrigerant to enter the outdoor heat exchanger first. The refrigerant condenses, liquefies, releases heat and becomes a liquid, while increasing the outdoor air temperature. The high-pressure liquid refrigerant is reduced in pressure by the electronic expansion valve and enters the indoor heat exchanger. It evaporates, vaporizes, absorbs heat and becomes a low-pressure gas, while absorbing heat from the indoor air, increasing the indoor air temperature. The low-pressure refrigerant enters the compressor again for pressurization, and this cycle achieves a cooling effect.

[0058] When the air conditioner is heating, the gaseous refrigerant is pressurized by the compressor to become a high-temperature and high-pressure gas. The four-way valve controls the refrigerant to enter the indoor heat exchanger first. The refrigerant condenses and liquefies to release heat to become a liquid, while heating the indoor air and raising the indoor temperature. The high-pressure liquid refrigerant is decompressed by the electronic expansion valve and enters the outdoor heat exchanger. It evaporates and gasifies to absorb heat to become a low-pressure gas, while absorbing the heat of the outdoor air, and enters the compressor again for pressurization. This cycle achieves the heating effect.

[0059] The air conditioner also includes a first temperature detection element, a second temperature detection element, a third temperature detection element and a current collection element. The first temperature detection element is installed on the outdoor heat exchanger to detect the outdoor ambient temperature To and transmit the outdoor ambient temperature information to the control device in real time; the second temperature detection element is installed on the indoor heat exchanger to detect the indoor ambient temperature Tr and transmit the indoor ambient temperature information to the control device in real time; the third temperature detection element is installed at the exhaust port of the compressor to detect the actual exhaust temperature Tp of the compressor 实 The actual exhaust temperature information of the compressor is transmitted to the control device in real time; the current acquisition component is used to collect the actual phase current value I of the compressor 实 The phase current information is transmitted to the control device in real time. The first temperature detection element, the second temperature detection element, the third temperature detection element and the current acquisition element are commonly used components in the art, and the specific structure is not repeated here.

[0060] The control device includes a processor and a memory storing program instructions, the memory is coupled to the processor so that the processor can read information from the memory and write information to the storage medium. The memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory, electrically erasable programmable read-only memory, erasable programmable read-only memory, programmable read-only memory, read-only memory, magnetic memory, flash memory, disk or optical disk. The memory can be any available storage medium that can be accessed by a general or special computer. The processor is connected in communication with the first temperature detection component, the second temperature detection component, the third temperature detection component and the current acquisition component, and the processor is connected in communication with the electronic expansion valve, can receive the actual opening information of the electronic expansion valve, and control and adjust the opening of the electronic expansion valve, and the processor is also configured to execute the control method of the air conditioner when running the program instructions.

[0061] Specifically, the control method of the air conditioner includes determining whether the air conditioner enters a high-temperature cooling mode based on the outdoor ambient temperature and the indoor ambient temperature. If the outdoor ambient temperature is greater than or equal to a first preset temperature and the indoor ambient temperature is greater than or equal to a second preset temperature, the air conditioner enters a high-temperature cooling mode.

[0062] In high temperature cooling mode, if the actual phase current I 实 < maximum phase current Imax, and lasts for a preset time, dynamically adjust the target exhalation temperature Tp according to the outdoor ambient temperature 目 , due to the actual exhaled air temperature Tp 实 <Target exhalation temperature Tp 目 , the electronic expansion valve will close slowly, and the opening of the electronic expansion valve is based on P 目 =P 实 -△P1 is adjusted to a smaller value, thereby increasing the system pressure, raising the phase current value, lowering the air outlet temperature, and improving the cooling effect of the air conditioner.

[0063] Specifically, the opening degree of the electronic expansion valve is determined according to P 目 =P 实 -△P1 is reduced, where △P1 is adjusted according to P 实 With Tp 目 The difference is obtained by using the PID algorithm and becomes a positive integer. The input of the PID control algorithm is each time P 实 With Tp 目 The difference: R0, R1, ... R n-1 , R n ; The output of the PID control algorithm is the opening degree of the electronic expansion valve P: P0, P1, ... P n-1 , P n According to P 实 With Tp 目The difference between the proportional term, integral term and differential term is obtained, and the total output F k is the sum of the outputs of the proportional term, integral term, and differential term, and we get F k The obtained F k Substitute △P1=F k -F k-1 , △P1 is calculated. For the convenience of calculation, △P1 is taken as a positive integer N. Preferably, the digits after the decimal point are discarded when taking a positive integer, that is, when calculating P 目 =P 实 -In △P1, △P1=N.

[0064] If the actual phase current I 实 ≥ Maximum phase current Imax, and lasts for a preset time, according to P 目 =P 实 +△P2, increase the opening of the electronic expansion valve. This can reduce the system pressure, reduce the phase current value, and enable the air conditioner to operate stably. Although the outlet temperature increases, it still has a certain cooling effect. A dynamic balance between system pressure and cooling effect is achieved, allowing the air conditioner to operate more safely and stably, while providing a more comfortable cooling effect.

[0065] Embodiment 2

[0066] This embodiment discloses a method for controlling an air conditioner, and the air conditioner is the air conditioner in the first embodiment.

[0067] like Figure 1 As shown, the main steps of the air conditioner control method include:

[0068] S1. The air conditioner enters high temperature cooling mode.

[0069] S2, according to the current actual phase current I 实 The size of the electronic expansion valve is used to adjust the opening of the electronic expansion valve.

[0070] After the air conditioner enters the high-temperature cooling mode, the opening of the electronic expansion valve is adjusted according to the current actual phase current, thereby adjusting the system pressure, phase current value and outlet air temperature, so that the air conditioner can still have a cooling effect without stopping. A dynamic balance between system pressure and cooling effect is achieved, so that the air conditioner can operate more safely and stably, while providing a more comfortable cooling effect.

[0071] like Figure 2 As shown, the specific steps of the air conditioner control method include:

[0072] S10. Obtain the outdoor ambient temperature To and the indoor ambient temperature Tr.

[0073] S20, determine whether the outdoor environment temperature To is ≥ a first preset temperature, the first preset temperature is set to 66°C, if not, execute S31; if yes, execute S32.

[0074] S31: The air conditioner continues the current operation mode and returns to S1.

[0075] S32, determine whether the indoor environment temperature Tr is ≥ the second preset temperature, the second preset temperature is set to 32°C, if not, execute S31; if yes, the air conditioner enters the high temperature cooling mode.

[0076] S40, obtain the current actual phase current I 实 , Actual opening of electronic expansion valve P 实 and actual exhaled air temperature Tp 实 .

[0077] S50, judging the current actual phase current I 实 ≥ the maximum phase current Imax, and lasts for a preset time, wherein the maximum phase current value Imax is set according to the actual situation. If no, execute S610; if yes, execute S620.

[0078] S610: Determine target exhalation temperature Tp 目 =To+△T, where △T is the preset temperature, which can be set by engineers according to actual working conditions. The target exhalation temperature is dynamically determined based on the outdoor ambient temperature and the preset temperature.

[0079] S611, due to the actual exhaled air temperature Tp 实 <Tp 目 , the processor will control the electronic expansion valve to slowly decrease according to P 实 With Tp 目 The difference is obtained by using the PID algorithm and is taken as a positive integer to determine △P1.

[0080] S612, according to the target opening degree P of the electronic expansion valve 目 =P 实 -△P1, determine the target opening of the electronic expansion valve, and adjust the opening of the electronic expansion valve to the target opening. As the opening of the electronic expansion valve gradually decreases, the system high pressure gradually increases, the total current effective value and phase current effective value of the air conditioner increase, the air outlet temperature of the air conditioner decreases, and a good cooling effect is achieved on the indoor environment.

[0081] The target air discharge temperature is dynamically adjusted according to the change of the outdoor ambient temperature, and then △P1 is dynamically determined according to the difference between the actual opening of the electronic expansion valve and the target air discharge temperature, and then the target opening of the electronic expansion valve is dynamically adjusted, so that the opening of the electronic expansion valve can be related to the outdoor ambient temperature, so that the air conditioner can be more adapted to operate stably in a high temperature environment and provide a good cooling effect.

[0082] S620, according to P 目 =P 实 +△P2, determine the target opening of the electronic expansion valve, where △P2 is a preset opening. Preferably, the size of △P2 is an integer between 10-50 pul se, which can be specifically set by engineers according to actual working conditions. As the opening of the electronic expansion valve gradually increases, the system high pressure can be reduced, the phase current value is reduced, and the load is interrupted, so that the air conditioner can operate stably. At this time, although the outlet temperature increases, it still has a certain cooling effect, achieving a dynamic balance between system pressure and cooling effect.

[0083] By taking the outdoor ambient temperature, indoor ambient temperature, phase current value and actual air discharge temperature as parameter values, and controlling the target air discharge temperature and the opening of the electronic expansion valve, the air conditioner can have a cooling effect without stopping, achieving a dynamic balance between system pressure and cooling effect, allowing the air conditioner to operate safely and stably in high-temperature cooling mode, while providing a more comfortable cooling effect.

[0084] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner includes an electronic expansion valve; The control method comprises the following steps: In high temperature cooling mode, According to the actual phase current I 实 The size of the electronic expansion valve is used to adjust the opening of the electronic expansion valve.

2. The control method according to claim 1, characterized in that: “Adjusting the opening of the electronic expansion valve according to the current actual phase current I1” specifically includes: If the actual phase current I 实 ≥ the maximum phase current Imax, and continue for a preset time, increasing the opening of the electronic expansion valve.

3. The control method according to claim 2, characterized in that: “Increasing the opening of the electronic expansion valve” specifically includes: The target opening degree P of the electronic expansion valve 目 =P 实 +△P2; Among them, P 实 is the actual opening of the electronic expansion valve, and ΔP2 is the preset opening.

4. The control method according to claim 3, characterized in that: The size of △P2 is an integer between 10-50 pulses.

5. The control method according to claim 2, characterized in that: "Adjusting the opening of the electronic expansion valve according to the current actual phase current I1" specifically includes: If the actual phase current I 实 <maximum phase current Imax and lasts for a preset time, reducing the opening of the electronic expansion valve.

6. The control method according to claim 5, characterized in that: “Reducing the opening of the electronic expansion valve” specifically includes: The target opening degree P of the electronic expansion valve 目 =P 实 -△P1; Among them, P 实 is the actual opening of the electronic expansion valve, ΔP1 is based on P 实 and target exhalation temperature Tp 目 Sure.

7. The control method according to claim 6, characterized in that: "△P1 According to P 实 and target exhaled air temperature Tp 目 "Confirmation" specifically includes: Target exhaled air temperature Tp 目 =To+△T; Where To is the outdoor ambient temperature, △T is the preset temperature; Get P 实 With Tp 目 The difference between Use the difference to get a positive integer N; △P1=N.

8. The control method according to claim 1, characterized in that: When the outdoor ambient temperature To≥the first preset temperature and the indoor ambient temperature Tr≥the second preset temperature, the air conditioner enters the high-temperature cooling mode.

9. A control device for an air conditioner, characterized in that: The control device comprises a processor and a memory storing program instructions, and the processor is configured to execute the air conditioner control method according to any one of claims 1 to 8 when running the program instructions.

10. An air conditioner, characterized in that: The air conditioner comprises: The control device for an air conditioner as claimed in claim 9; a first temperature detection element, the first temperature detection element being used to detect the outdoor ambient temperature and transmit the outdoor ambient temperature information to the control device; a second temperature detection element, the second temperature detection element being used to detect the indoor ambient temperature and transmit the indoor ambient temperature information to the control device; a third temperature detection element, the third temperature detection element being used to detect the actual exhaled air temperature and transmit the actual exhaled air temperature information to the control device; A current collection component, the current collection component is used to collect phase current values ​​and transmit the phase current value information to the control device; An electronic expansion valve is communicatively connected with the control device.

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