Air conditioner and control method thereof

Abstract

The invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method thereof. A heat exchanger and an electric heater are arranged in an indoor unit of the air conditioner, and the control method of the air conditioner comprises the steps that under the condition that the air conditioner is detected to be in a refrigeration mode, the condensation temperature of the indoor unit, the temperature of the electric heater and the temperature of inlet air flow of the indoor unit after flowing through the heat exchanger are obtained; the temperature difference between the temperature of the electric heater and the temperature of the inlet air flow flowing through the heat exchanger is calculated; and the temperature difference and the condensation temperature are compared, and operation of the air conditioner is controlled according to the comparison result. The temperature difference and the condensation temperature are compared, operation of the air conditioner is controlled according to the comparison result, the problem that condensation is generated on the surface of an electric heater under the condition that the air conditioner is provided with the electric heater is solved, a good condensation prevention effect is provided, and therefore the situation that water is blown out by air is avoided, and the service life of the air conditioner is prolonged. And the use experience of the user is improved.

Description

Technical Field

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

[0002] As people's living standards continue to improve, air conditioners have gradually become one of the essential household appliances in people's daily lives. In order to improve the heating effect of air conditioners, some existing air conditioners are usually equipped with an electric heater inside the heat exchanger in the indoor unit, which is activated in the heating mode of the air conditioner to assist heating.

[0003] However, anti-condensation air conditioners currently on the market typically reduce condensation by adjusting the difference between the indoor unit's heat exchanger coil temperature and the indoor ambient dew point. In cooling mode, the electric heater is typically deactivated. When the indoor unit's heat exchanger is operating at low temperatures, the temperature of the electric heater inside the heat exchanger is also low. However, if the air conditioner's electric heater is deactivated and only adjusts the difference between the indoor unit's heat exchanger coil temperature and the indoor ambient dew point, some of the incoming air passing through the evaporator will directly come into contact with the electric heater, causing condensation to form on the low-temperature heater surface. This condensation is then blown out of the air duct, resulting in a poor user experience. Summary of the Invention

[0004] In view of the above problems, an air conditioner and a control method thereof are proposed to overcome the above problems or at least partially solve the above problems.

[0005] An object of the first aspect of the present invention is to provide a method for controlling an air conditioner to improve the user experience of the air conditioner.

[0006] A further object of the first aspect of the present invention is to improve the anti-condensation effect.

[0007] The second aspect of the present invention aims to provide an air conditioner that implements the above control method to better meet user needs.

[0008] According to a first aspect of the present invention, a method for controlling an air conditioner is provided. The indoor unit of the air conditioner is provided with a heat exchanger and an electric heater. The method comprises:

[0009] When it is detected that the air conditioner is in cooling mode, the condensation temperature of the indoor unit, the temperature of the electric heater, and the temperature of the indoor unit's inlet air after passing through the heat exchanger are obtained;

[0010] Calculate the temperature difference between the temperature of the electric heater and the temperature of the incoming air after it passes through the heat exchanger;

[0011] Compare the temperature difference and condensation temperature, and control the operation of the air conditioner based on the comparison results.

[0012] Furthermore, controlling the operation of the air conditioner according to the comparison result includes:

[0013] If the temperature difference and condensation temperature are different, adjust the operating parameters of the air conditioner to make the temperature difference and condensation temperature the same;

[0014] When the temperature difference and the condensation temperature are the same, the adjustment of the operating parameters of the air conditioner is skipped.

[0015] Furthermore, adjusting the operating parameters of the air conditioner includes:

[0016] Adjust the temperature of the electric heater and / or the temperature of the heat exchanger.

[0017] Furthermore, when the temperature difference and the condensation temperature are different, adjusting the operating parameters of the air conditioner includes:

[0018] When the temperature difference is less than the condensation temperature, lowering the temperature of the electric heater and / or lowering the temperature of the heat exchanger; and

[0019] When the temperature difference is greater than the condensation temperature, the temperature of the electric heater and / or the temperature of the heat exchanger is increased.

[0020] Furthermore, when the temperature difference is less than the condensation temperature, lowering the temperature of the electric heater and / or lowering the temperature of the heat exchanger includes:

[0021] When the temperature difference is less than the condensation temperature, reduce the temperature of the electric heater;

[0022] Determine whether the temperature difference is less than the condensation temperature;

[0023] If so, reduce the temperature of the heat exchanger;

[0024] If not, skip adjusting the operating parameters of the air conditioner.

[0025] Further, lowering the temperature of the electric heater includes:

[0026] Turn off the electric heater.

[0027] Furthermore, when the temperature difference is greater than the condensation temperature, increasing the temperature of the electric heater and / or increasing the temperature of the heat exchanger includes:

[0028] When the temperature difference is greater than the condensation temperature, increase the temperature of the electric heater;

[0029] Determine whether the temperature difference is greater than the condensation temperature;

[0030] If so, increase the temperature of the heat exchanger;

[0031] If not, skip adjusting the operating parameters of the air conditioner.

[0032] Furthermore, adjusting the temperature of the heat exchanger includes:

[0033] Adjust the frequency of the air conditioner's compressor.

[0034] Furthermore, obtaining the condensation temperature of the indoor unit includes:

[0035] Detect the ambient temperature and relative humidity of the indoor unit;

[0036] Calculate the condensation temperature of the indoor unit based on the ambient temperature and relative humidity.

[0037] According to a second aspect of the present invention, there is also provided an air conditioner, comprising:

[0038] an indoor unit in which a heat exchanger and an electric heater are provided; and

[0039] A processing module and a storage module, wherein the storage module stores a machine executable program, and when the machine executable program is executed by the processing module, it is used to implement any of the control methods described above.

[0040] The air conditioner and control method of the present invention establish anti-condensation parameters by detecting that the air conditioner is in cooling mode, obtaining the condensation temperature of the indoor unit, the temperature of the electric heater, and the temperature of the indoor unit's inlet airflow after passing through the heat exchanger, and calculating the temperature difference between the temperature of the electric heater and the temperature of the inlet airflow after passing through the heat exchanger. The air conditioner and control method of the present invention also compare the temperature difference with the condensation temperature and control the air conditioner's operation based on the comparison result. This prevents condensation on the surface of the electric heater when the air conditioner is equipped with the electric heater, providing a good anti-condensation effect, thereby preventing the air from blowing water and improving the user experience.

[0041] Furthermore, the air conditioner and its control method of the present invention adjust the operating parameters of the air conditioner to make the temperature difference and the condensation temperature the same when the temperature difference and the condensation temperature are different, and skip the adjustment operation of the operating parameters of the air conditioner when the temperature difference and the condensation temperature are the same, thereby refining the operating status control scheme of the air conditioner, improving the accuracy of the air conditioner control, thereby improving the anti-condensation effect, and further improving the user experience.

[0042] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0044] Figure 1 is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present invention;

[0045] Figure 2 is a schematic block diagram of an air conditioner according to an embodiment of the present invention;

[0046] Figure 3 is a schematic diagram of a method for controlling an air conditioner according to an embodiment of the present invention;

[0047] Figure 4 is a control flow chart of a method for controlling an air conditioner according to an embodiment of the present invention. DETAILED DESCRIPTION

[0048] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present invention to those skilled in the art.

[0049] Figure 1 FIG. 1 is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present invention. Figure 1 As shown, the air conditioner 1 may include an indoor unit 10 , in which a heat exchanger 100 and an electric heater 200 are provided.

[0050] like Figure 1 As shown, the indoor unit 10 is provided with an air inlet 11 and an air outlet 12. A heat exchanger 100, an electric heater 200, and a fan 13 are also provided within the indoor unit 10 along the airflow path from the air inlet 11 to the air outlet 12. When the air conditioner 1 is in operation, the fan 13 drives the airflow 20 of the indoor unit 10 into the indoor unit 10 through the air inlet 11, flows through the heat exchanger 100, the electric heater 200, and the fan 13, and is blown out of the air outlet to heat or cool the indoor environment.

[0051] When the air conditioner 1 is in heating mode, the heat exchanger 100 in the indoor unit 10 functions as a condenser to heat the incoming air 20, thereby increasing the indoor temperature. When the air conditioner 1 is in cooling mode, the heat exchanger 100 in the indoor unit 10 functions as an evaporator to cool the incoming air 20, thereby lowering the indoor temperature.

[0052] like Figure 1 As shown, the electric heater 200 is disposed inside the heat exchanger 100. Specifically, the electric heater 200 is positioned between the heat exchanger 100 and the fan 13, downstream of the heat exchanger 100 along the airflow path from the air inlet 11 to the air outlet 12. When the air conditioner 1 is in operation, the fan 13 drives the intake air 20 first through the heat exchanger 100. A portion of the intake air 20 then flows through the electric heater 200, while another portion of the intake air 20 passes through the heat exchanger 100 directly to the electric heater 200.

[0053] When the air conditioner 1 is in heating mode, while the heat exchanger 100 in the indoor unit 10 is used as a condenser for heating, the electric heater 200 can be controlled to start for auxiliary heating, thereby further improving the heating effect of the air conditioner 1 .

[0054] When the air conditioner 1 is in cooling mode, the heat exchanger 100 in the indoor unit 10 functions as an evaporator to cool the incoming air 20. Because the electric heater 200 is located near the heat exchanger 100, when the electric heater 200 is not activated, the temperature of the electric heater 200 located inside the heat exchanger 100 is lower than room temperature due to the cooling effect of the heat exchanger 100.

[0055] In a specific embodiment, the temperature of the inlet air flow 20 is T1, the temperature of the electric heater 200 is T2, the temperature of the inlet air flow 20 after passing through the heat exchanger 100 is T3, the set temperature is T5, and the outlet temperature is T6.

[0056] Because the intake airflow 20 enters the indoor unit 10 from the indoor environment under the influence of the fan 13, the temperature T1 of the intake airflow 20 is the same as the room temperature. However, when the electric heater 200 is not activated, the temperature T2 of the electric heater 200 is lower than the room temperature due to the cooling effect of the heat exchanger 100. In other words, when the electric heater 200 is not activated, the temperature T2 of the electric heater 200 is lower than the temperature T1 of the intake airflow 20. In this case, the temperature T1 of the intake airflow 20 is higher than the temperature T2 of the electric heater 200. The portion of the intake airflow 20 that directly reaches the electric heater 200 through the heat exchanger 100 is the same as the temperature T1 of the intake airflow 20 because it is not cooled by the heat exchanger 100. In other words, the warm and moist intake airflow 20 can directly come into contact with the cold electric heater 200. Therefore, when the air conditioner 1 is in cooling mode, there is a risk that the intake airflow 20 can directly come into contact with the cold electric heater 200, resulting in condensation.

[0057] Furthermore, the electric heater 200 is spaced apart from the heat exchanger 100. Therefore, the temperature reached by the electric heater 200, indirectly cooled by the heat exchanger 100, is higher than the temperature of the intake airflow 20 after direct heat exchange with the heat exchanger 100. In other words, when the electric heater 200 is not activated, the temperature T2 of the electric heater 200 is higher than the temperature T3 of the intake airflow 20 after it passes through the heat exchanger 100. However, when the electric heater 200 is activated, the temperature T2 of the electric heater 200 increases, still exceeding the temperature T3 of the intake airflow 20 after it passes through the heat exchanger 100.

[0058] Based on this, the temperature T2 of the electric heater 200 is lower than the temperature T1 of the inlet air flow 20 , and higher than the temperature T3 of the inlet air flow 20 after passing through the heat exchanger 100 .

[0059] In one specific embodiment, when the air conditioner 1 is in cooling mode, the fan 13 drives the inlet airflow 20 of the indoor unit 10 through the air inlet 11. The temperature of the inlet airflow 20 is T1. A portion of the inlet airflow 20 passes through the heat exchanger 100 and absorbs heat there, reaching a temperature of T3. After passing through the heat exchanger 100, the inlet airflow 20 is heated by the electric heater 200 at a temperature of T2, reaching an outlet air temperature of T6. Another portion of the inlet airflow 20 at temperature T1 passes directly through the heat exchanger 100 and reaches the electric heater 200. Cooled by the electric heater 200 at a temperature of T2, the temperature is lowered, thereby providing a low-temperature heat exchange airflow to the indoor environment. The outlet airflow enters the indoor environment, lowering the indoor temperature until the indoor temperature reaches a set temperature of T5.

[0060] In one embodiment, in order to avoid the generation of condensed water on the surface of the electric heater 200 when the incoming air flow 20 with a temperature of T1 passes through the heat exchanger 100 and directly reaches the electric heater 200, the electric heater 200 of the present invention can also be started when the air conditioner 1 is in cooling mode to reduce the temperature difference between the electric heater 200 and the incoming air flow 20, thereby reducing the risk of generating condensed water and solving the water blowing problem.

[0061] In some embodiments, to better control the operating state of the electric heater 200 when the air conditioner 1 is in cooling mode, the air conditioner 1 of the present invention establishes a set of anti-condensation parameters, including the condensation temperature T4 and the temperature difference ΔT. Specifically, the temperature difference ΔT is set to be the temperature difference between the temperature T3 of the inlet air flow 20 after passing through the heat exchanger 100 and the electric heating temperature T2. In other words, the temperature difference ΔT = |T3 - T2|.

[0062] It should be noted that the condensation temperature T4 refers to the dew point temperature, which can be calculated based on environmental parameters, which may include ambient temperature and relative humidity.

[0063] In a specific embodiment, the air conditioner 1 of the present invention obtains the condensation temperature T4 of the indoor unit 10 by detecting the ambient temperature and relative humidity of the environment in which the indoor unit 10 is located, and calculating the condensation temperature T4 of the indoor unit 10 based on the ambient temperature and relative humidity. Specifically, the calculation formula for calculating the condensation temperature T4 of the indoor unit 10 based on the ambient temperature and relative humidity can be obtained based on pre-experiments and stored in the air conditioner 1.

[0064] In this embodiment, the temperature difference ΔT is compared with the condensation temperature T4. To ensure the best cooling effect and the condensation-free water blowing effect, the temperature difference ΔT = condensation temperature T4 is the optimal state.

[0065] That is, when the air conditioner 1 is in cooling mode, the cooling effect is best when the temperature difference ΔT = condensation temperature T4, and the inlet air flow 20 with a temperature of T1 intersects with the electric heater 200, and no condensed water is generated on the surface of the electric heater 200.

[0066] In some embodiments, when the air conditioner 1 is in cooling mode, the temperature of the heat exchanger 100 of the present invention and the temperature T2 of the electric heater 200 can be adjusted in a controlled manner according to the comparison results of the temperature difference △T and the condensation temperature T4, so that the temperature difference △T is balanced with the condensation temperature T4, thereby avoiding the generation of condensed water on the surface of the electric heater 200.

[0067] The air conditioner 1 of the present invention compares the temperature difference ΔT and the condensation temperature T4, and controls the operation of the air conditioner 1 according to the comparison result, thereby avoiding the generation of condensation on the surface of the electric heater 200 when the air conditioner 1 is provided with an electric heater 200, providing a good anti-condensation effect, thereby avoiding the situation where the air blows water, and thus improving the user experience.

[0068] Figure 2 FIG. 1 is a schematic block diagram of an air conditioner 1 according to an embodiment of the present invention. Figure 2 As shown, the air conditioner 1 may further include a processing module 300 and a storage module 400 .

[0069] The storage module 400 and the processing module 300 may form part of the main control board of the air conditioner 1. The processing module 300 may be a central processing unit (CPU), a digital processing unit (DSP), or the like. The storage module 400 is used to store programs executed by the processing module 300. The storage module 400 stores a machine-executable program 410. When executed by the processing module 300, the machine-executable program 410 is used to implement the air conditioner control method described in any one or a combination of the following embodiments.

[0070] Based on the same technical concept, an embodiment of the present invention further provides a method for controlling an air conditioner.

[0071] Figure 3 A schematic diagram of a method for controlling an air conditioner according to an embodiment of the present invention is shown. The air conditioner 1 includes an outdoor unit and an indoor unit 10. The indoor unit 10 is provided with a heat exchanger 100 and an electric heater 200. The method for controlling the air conditioner may generally include the following steps S302 to S306.

[0072] Step S302: When it is detected that the air conditioner is in cooling mode, the temperature of the condensation temperature electric heater of the indoor unit and the temperature of the inlet air flow of the indoor unit after passing through the heat exchanger are obtained.

[0073] Step S304 , calculating the temperature difference between the temperature of the electric heater and the temperature of the inlet air flow after passing through the heat exchanger.

[0074] Step S306: compare the temperature difference with the condensation temperature, and control the operation of the air conditioner according to the comparison result.

[0075] It should be noted that the condensation temperature T4 of the indoor unit 10 can be obtained through preliminary experiments and stored in the storage module 400 of the air conditioner 1, or can be calculated based on the environmental parameters of the indoor unit 10. The temperature T2 of the electric heater 200 and the temperature T3 of the inlet air flow 20 of the indoor unit 10 after passing through the heat exchanger 100 can be directly detected by the temperature sensor.

[0076] The control method of the air conditioner in an embodiment of the present invention obtains the condensation temperature T4 of the indoor unit 10, the temperature T2 of the electric heater 200, and the temperature T3 of the intake air flow 20 of the indoor unit 10 after passing through the heat exchanger 100 when detecting that the air conditioner 1 is in the cooling mode, and calculates the temperature difference ΔT between the temperature T2 of the electric heater 200 and the temperature T3 of the intake air flow 20 after passing through the heat exchanger 100, thereby realizing the establishment of anti-condensation parameters.

[0077] Furthermore, the control method of the air conditioner of the present invention also compares the temperature difference △T and the condensation temperature T4, and controls the operation of the air conditioner 1 according to the comparison result, thereby avoiding the generation of condensation on the surface of the electric heater 200 when the air conditioner 1 is provided with an electric heater 200, providing a good anti-condensation effect, thereby avoiding the situation where the air blows water, and thus improving the user experience.

[0078] In some optional embodiments, in the above step S302, the condensation temperature T4 of the indoor unit 10 can be directly read, and the temperature T2 of the electric heater 200 and the temperature T3 of the intake air flow 20 of the indoor unit 10 after passing through the heat exchanger 100 can be directly detected by the temperature sensor.

[0079] In other optional embodiments, in step S302 above, the condensation temperature T4 of the indoor unit 10 can be obtained by: detecting the indoor ambient temperature and relative humidity of the indoor environment in which the indoor unit 10 is located; and calculating the condensation temperature T4 of the indoor unit 10 based on the indoor ambient temperature and relative humidity. Furthermore, the temperature T2 of the electric heater 200 and the temperature T3 of the inlet airflow 20 of the indoor unit 10 after passing through the heat exchanger 100 can be directly detected by a temperature sensor.

[0080] In some embodiments, in the above step S304, the calculation formula for the temperature difference △T between the temperature T2 of the electric heater 200 and the temperature T3 of the intake air flow 20 after passing through the heat exchanger 100 can be: temperature difference △T = |T3-T2|, where T2 is the temperature T2 of the electric heater 200, and T3 is the temperature T3 of the intake air flow 20 after passing through the heat exchanger 100.

[0081] The air conditioner control method of the embodiment of the present invention achieves more accurate acquisition of the condensation temperature T4 of the indoor unit 10 and the temperature difference ΔT between the temperature T2 of the electric heater 200 and the temperature T3 of the inlet air flow 20 after passing through the heat exchanger 100, thereby improving the accuracy of the anti-condensation parameter establishment.

[0082] In some embodiments, the step of controlling the operation of the air conditioner 1 according to the comparison result in the above step S306 may include the following steps: when the temperature difference △T and the condensation temperature T4 are not the same, adjusting the operating parameters of the air conditioner 1 so that the temperature difference △T and the condensation temperature T4 are the same; when the temperature difference △T and the condensation temperature T4 are the same, skipping the adjustment operation of the operating parameters of the air conditioner 1.

[0083] It should be noted that the operating parameters may include the frequency of the compressor, the temperature of the heat exchanger 100 , the rotation speed of the fan 13 , the swing state of the air guide plate, and the like.

[0084] The air conditioner control method of the embodiment of the present invention adjusts the operating parameters of the air conditioner 1 so that the temperature difference ΔT and the condensation temperature T4 are the same when the temperature difference ΔT and the condensation temperature T4 are different, and skips the adjustment operation of the operating parameters of the air conditioner 1 when the temperature difference ΔT and the condensation temperature T4 are the same, thereby refining the operating state control scheme of the air conditioner 1, improving the accuracy of the control of the air conditioner 1, and further improving the user experience.

[0085] In some embodiments, adjusting the operating parameters of the air conditioner 1 may include adjusting the temperature T2 of the electric heater 200 and / or the temperature of the heat exchanger 100. On this basis, after adjusting the operating parameters of the air conditioner 1, the temperature difference ΔT may be further adjusted so that the temperature difference ΔT is equal to the condensation temperature T4.

[0086] Using the above method, when the temperature difference ΔT and the condensation temperature T4 are different, the temperature difference ΔT can be further adjusted to make the temperature difference ΔT and the condensation temperature T4 the same, thereby avoiding the problem of the cooling effect not being released to the maximum extent or the generation of condensation due to the imbalance between the temperature difference ΔT and the condensation temperature T4, and better meeting the user's usage needs.

[0087] In some embodiments, the above-mentioned step of adjusting the operating parameters of the air conditioner 1 when the temperature difference △T and the condensation temperature T4 are different may include the following steps: when the temperature difference △T is less than the condensation temperature T4, lowering the temperature T2 of the electric heater 200 and / or lowering the temperature of the heat exchanger 100; and when the temperature difference △T is greater than the condensation temperature T4, increasing the temperature T2 of the electric heater 200 and / or increasing the temperature of the heat exchanger 100.

[0088] When the temperature difference ΔT is less than the condensation temperature T4, the cooling effect is not released to the maximum extent. Therefore, the temperature T2 of the electric heater 200 can be lowered to avoid the impact of the excessively high temperature T2 of the electric heater 200 on the cooling effect, thereby improving the cooling effect.

[0089] Furthermore, if the temperature difference ΔT is less than the condensation temperature T4, the temperature of the heat exchanger 100 can be further lowered to increase cooling capacity, thereby further improving the cooling effect. Simultaneously, lowering the temperature of the heat exchanger 100 can lower the temperature T3 of the inlet airflow 20 after it passes through the heat exchanger 100. Since the temperature difference ΔT = |T3 - T2|, and the temperature T2 of the electric heater 200 is higher than the temperature T3 of the inlet airflow 20 after it passes through the heat exchanger 100, lowering the temperature T3 of the inlet airflow 20 after it passes through the heat exchanger 100 can increase the temperature difference ΔT, thereby achieving a balance between the temperature difference ΔT and the condensation temperature T4.

[0090] In some optional embodiments, the step of adjusting the temperature of the heat exchanger 100 may be specifically performed by adjusting the frequency of the compressor of the air conditioner 1. Furthermore, the step of lowering the temperature of the heat exchanger 100 may be specifically performed by increasing the frequency of the compressor of the air conditioner 1 to increase the cooling capacity of the air conditioner 1.

[0091] In other optional embodiments, the air conditioner 1 of the present invention can also adjust the temperature of the heat exchanger 100 in other ways, such as adjusting the opening of the expansion valve.

[0092] When the temperature difference ΔT is greater than the condensation temperature T4, there is a risk of condensation caused by the convergence of cold and hot. Therefore, the temperature T2 of the electric heater 200 can be increased to reduce the temperature difference between the incoming air flow 20 and the electric heater 200, thereby reducing the risk of condensation caused by the excessively low temperature T2 of the electric heater 200.

[0093] Furthermore, if the temperature difference ΔT is greater than the condensation temperature T4, the temperature of the heat exchanger 100 can be further increased, thereby increasing the temperature T3 of the inlet airflow 20 after passing through the heat exchanger 100. Since the temperature difference ΔT = |T3-T2|, and the temperature T2 of the electric heater 200 is higher than the temperature T3 of the inlet airflow 20 after passing through the heat exchanger 100, increasing the temperature T3 of the inlet airflow 20 after passing through the heat exchanger 100 can reduce the temperature difference ΔT, thereby achieving a balance between the temperature difference ΔT and the condensation temperature T4.

[0094] In some optional embodiments, the step of increasing the temperature of the heat exchanger 100 may be specifically performed as the following steps: reducing the frequency of the compressor of the air conditioner 1 to reduce the cooling capacity of the heat exchanger 100 .

[0095] In other optional embodiments, the step of increasing the temperature of the heat exchanger 100 may also be specifically performed as the following steps: reducing the opening of the entire expansion valve of the air conditioner 1 to reduce the cooling capacity of the heat exchanger 100.

[0096] In some embodiments, the above-mentioned step of lowering the temperature T2 of the electric heater 200 and / or lowering the temperature of the heat exchanger 100 when the temperature difference △T is less than the condensation temperature T4 may include the following steps: lowering the temperature T2 of the electric heater 200 when the temperature difference △T is less than the condensation temperature T4; determining whether the temperature difference △T is less than the condensation temperature T4; if so, lowering the temperature of the heat exchanger 100; otherwise, skipping the adjustment operation of the operating parameters of the air conditioner 1.

[0097] That is to say, when the temperature difference ΔT is less than the condensation temperature T4, the temperature T2 of the electric heater 200 is first lowered, and when the temperature difference ΔT is still less than the condensation temperature T4 after the temperature T2 of the electric heater 200 is lowered, the temperature of the heat exchanger 100 is further lowered to balance the temperature difference ΔT and the condensation temperature T4.

[0098] In an optional embodiment, the step of reducing the temperature T2 of the electric heater 200 may include the following step: turning off the electric heater 200 .

[0099] In another optional embodiment, the step of reducing the temperature T2 of the electric heater 200 may further include the following steps: gradually reducing the temperature T2 of the electric heater 200 by a preset temperature reduction value until the electric heater 200 is turned off. The preset temperature reduction value may be set to 0.5°C to 10°C. In a specific embodiment, the preset temperature reduction value may be set to 0.5°C to 2°C. For example, the preset temperature reduction value may be set to 1°C.

[0100] Using the above method, when the temperature difference ΔT is less than the condensation temperature T4, a further comparison operation of the temperature difference ΔT and the condensation temperature T4 is added, and the temperature T2 of the electric heater 200 and the temperature of the heat exchanger 100 are adjusted in an orderly manner. When the temperature difference ΔT is less than the condensation temperature T4, the operating parameters of the air conditioner 1 are accurately and orderly adjusted to achieve a balance between the temperature difference ΔT and the condensation temperature T4, thereby ensuring the maximum release of the cooling effect while ensuring the anti-condensation effect, thereby improving the user experience.

[0101] In some embodiments, the above-mentioned step of increasing the temperature T2 of the electric heater 200 and / or increasing the temperature of the heat exchanger 100 when the temperature difference △T is greater than the condensation temperature T4 may include the following steps: when the temperature difference △T is greater than the condensation temperature T4, increasing the temperature T2 of the electric heater 200; determining whether the temperature difference △T is greater than the condensation temperature T4; if so, increasing the temperature of the heat exchanger 100; otherwise, skipping the adjustment operation of the operating parameters of the air conditioner 1.

[0102] That is to say, when the temperature difference ΔT is greater than the condensation temperature T4, the temperature T2 of the electric heater 200 is first increased, and when the temperature difference ΔT is still greater than the condensation temperature T4 after the temperature T2 of the electric heater 200 is increased, the temperature of the heat exchanger 100 is further increased to balance the temperature difference ΔT and the condensation temperature T4.

[0103] In an optional embodiment, the step of increasing the temperature T2 of the electric heater 200 may include the following steps: gradually increasing the temperature T2 of the electric heater 200 by a preset temperature increase value until the electric heater 200 is turned off. The preset temperature increase value may be set to 0.5°C to 10°C. In a specific embodiment, the preset temperature increase value may be set to 0.5°C to 2°C. For example, the preset temperature increase value may be set to 1°C.

[0104] Using the above method, when the temperature difference ΔT is greater than the condensation temperature T4, a further comparison operation of the temperature difference ΔT and the condensation temperature T4 is added, and the temperature T2 of the electric heater 200 and the temperature of the heat exchanger 100 are adjusted in an orderly manner. This achieves accurate and orderly adjustment of the operating parameters of the air conditioner 1 when the temperature difference ΔT is greater than the condensation temperature T4, so as to achieve a balance between the temperature difference ΔT and the condensation temperature T4, improve the anti-condensation effect, and thus improve the user experience.

[0105] According to any one of the above optional embodiments or a combination of multiple optional embodiments, the embodiments of the present invention can achieve the following beneficial effects:

[0106] The air conditioner control method of an embodiment of the present invention establishes anti-condensation parameters by detecting that the air conditioner 1 is in cooling mode, obtaining the condensation temperature T4 of the indoor unit 10, the temperature T2 of the electric heater 200, and the temperature T3 of the indoor unit 10's intake air flow 20 after passing through the heat exchanger 100, and calculating the temperature difference ΔT between the temperature T2 of the electric heater 200 and the temperature T3 of the intake air flow 20 after passing through the heat exchanger 100. The air conditioner control method of the present invention also compares the temperature difference ΔT with the condensation temperature T4 and controls the operation of the air conditioner 1 based on the comparison result. This prevents condensation on the surface of the electric heater 200 when the air conditioner 1 is equipped with the electric heater 200, providing a good anti-condensation effect, thereby preventing the air from blowing water and improving the user experience.

[0107] Furthermore, the air conditioner control method of the embodiment of the present invention adjusts the operating parameters of the air conditioner 1 when the temperature difference △T and the condensation temperature T4 are different, so that the temperature difference △T and the condensation temperature T4 are the same, and skips the adjustment operation of the operating parameters of the air conditioner 1 when the temperature difference △T and the condensation temperature T4 are the same, thereby refining the operating status control scheme of the air conditioner 1, improving the accuracy of the control of the air conditioner 1, thereby improving the anti-condensation effect, and further improving the user experience.

[0108] The above introduces Figure 3 There are multiple implementation methods for each link of the embodiment shown. The implementation process of the air conditioner control method of the present invention will be described in detail below through specific embodiments.

[0109] Figure 4 A flow chart of a method for controlling an air conditioner according to an embodiment of the present invention is shown. The flow chart generally includes the following steps:

[0110] Step S402 , when it is detected that the air conditioner is in cooling mode, the condensation temperature T4 of the indoor unit, the temperature T2 of the electric heater 200 , and the temperature T3 of the indoor unit's intake air flow 20 after passing through the heat exchanger 100 are obtained.

[0111] Step S404 , calculating the temperature difference ΔT between the temperature T2 of the electric heater 200 and the temperature T3 of the inlet air flow 20 after passing through the heat exchanger 100 .

[0112] Step S406 , determining whether the temperature difference ΔT is less than the condensation temperature T4 , if so, executing step S408 , if not, executing step S414 .

[0113] Step S408 , lowering the temperature T2 of the electric heater 200 until the electric heater 200 is turned off.

[0114] In step S410 , it is determined whether the temperature difference ΔT is less than the condensation temperature T4 . If so, step S412 is executed; if not, step S422 is executed.

[0115] Step S412: Increase the frequency of the compressor of the air conditioner 1 until the temperature difference ΔT is equal to the condensation temperature T4. This process ends here.

[0116] In step S414, it is determined whether the temperature difference ΔT is greater than the condensation temperature T4. If so, step S416 is executed; if not, step S422 is executed.

[0117] Step S416 , increasing the temperature T2 of the electric heater 200 .

[0118] In step S418 , it is determined whether the temperature difference ΔT is greater than the condensation temperature T4 . If so, step S420 is executed; otherwise, step S422 is executed.

[0119] Step S420: Reduce the frequency of the compressor of the air conditioner 1 until the temperature difference ΔT is equal to the condensation temperature T4. This process ends here.

[0120] Step S422: Skip adjusting the operating parameters of air conditioner 1. In this step, if the temperature difference ΔT is neither less than nor greater than the condensation temperature T4, it indicates that the temperature difference ΔT is equal to the condensation temperature T4, and the adjustment of the operating parameters of air conditioner 1 can be skipped. This concludes the process.

[0121] It should be noted that after the above steps S412, S420 and S422, the operating status of the air conditioner 1 will be continuously monitored, and when the next scheduled time is reached, the above step S402 will be continued to restart the process.

[0122] The air conditioner control method of an embodiment of the present invention establishes anti-condensation parameters by detecting that the air conditioner 1 is in cooling mode, obtaining the condensation temperature T4 of the indoor unit 10, the temperature T2 of the electric heater 200, and the temperature T3 of the indoor unit 10's intake air flow 20 after passing through the heat exchanger 100, and calculating the temperature difference ΔT between the temperature T2 of the electric heater 200 and the temperature T3 of the intake air flow 20 after passing through the heat exchanger 100. The air conditioner control method of the present invention also compares the temperature difference ΔT with the condensation temperature T4 and controls the operation of the air conditioner 1 based on the comparison result. This prevents condensation on the surface of the electric heater 200 when the air conditioner 1 is equipped with the electric heater 200, providing a good anti-condensation effect, thereby preventing the air from blowing water and improving the user experience.

[0123] Furthermore, the air conditioner control method of the embodiment of the present invention adjusts the operating parameters of the air conditioner 1 when the temperature difference △T and the condensation temperature T4 are different, so that the temperature difference △T and the condensation temperature T4 are the same, and skips the adjustment operation of the operating parameters of the air conditioner 1 when the temperature difference △T and the condensation temperature T4 are the same, thereby refining the operating status control scheme of the air conditioner 1, improving the accuracy of the control of the air conditioner 1, thereby improving the anti-condensation effect, and further improving the user experience.

[0124] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A method for controlling an air conditioner, wherein an indoor unit of the air conditioner is provided with a heat exchanger and an electric heater, the method comprising: When it is detected that the air conditioner is in cooling mode, obtaining the condensation temperature of the indoor unit, the temperature of the electric heater, and the temperature of the inlet air flow of the indoor unit after passing through the heat exchanger; calculating a temperature difference between a temperature of the electric heater and a temperature of the inlet air flow after passing through the heat exchanger; The temperature difference is compared with the condensation temperature, and the operation of the air conditioner is controlled according to the comparison result.

2. The control method according to claim 1, wherein: Controlling the operation of the air conditioner according to the comparison result includes: When the temperature difference and the condensation temperature are different, adjusting the operating parameters of the air conditioner so that the temperature difference and the condensation temperature are the same; When the temperature difference is the same as the condensation temperature, the adjustment operation of the operating parameters of the air conditioner is skipped.

3. The control method according to claim 2, wherein: Adjusting the operating parameters of the air conditioner includes: The temperature of the electric heater and / or the temperature of the heat exchanger are adjusted.

4. The control method according to claim 3, wherein: When the temperature difference and the condensation temperature are different, adjusting the operating parameters of the air conditioner includes: When the temperature difference is less than the condensation temperature, lowering the temperature of the electric heater and / or lowering the temperature of the heat exchanger; and When the temperature difference is greater than the condensation temperature, the temperature of the electric heater and / or the temperature of the heat exchanger are increased.

5. The control method according to claim 4, wherein: When the temperature difference is less than the condensation temperature, lowering the temperature of the electric heater and / or lowering the temperature of the heat exchanger includes: When the temperature difference is less than the condensation temperature, lowering the temperature of the electric heater; determining whether the temperature difference is less than the condensation temperature; If so, lowering the temperature of the heat exchanger; If not, the adjustment operation of the operating parameters of the air conditioner is skipped.

6. The control method according to claim 5, wherein: Lowering the temperature of the electric heater includes: Turn off the electric heater.

7. The control method according to claim 4, wherein: When the temperature difference is greater than the condensation temperature, increasing the temperature of the electric heater and / or increasing the temperature of the heat exchanger includes: When the temperature difference is greater than the condensation temperature, increasing the temperature of the electric heater; determining whether the temperature difference is greater than the condensation temperature; If so, increasing the temperature of the heat exchanger; If not, the adjustment operation of the operating parameters of the air conditioner is skipped.

8. The control method according to claim 3, wherein: Adjusting the temperature of the heat exchanger includes: Adjust the frequency of the compressor of the air conditioner.

9. The control method according to claim 1, wherein: Obtaining the condensation temperature of the indoor unit includes: Detecting the ambient temperature and relative humidity of the indoor unit; The condensation temperature of the indoor unit is calculated according to the ambient temperature and the ambient relative humidity.

10. An air conditioner comprising: an indoor unit in which a heat exchanger and an electric heater are provided; as well as A processing module and a storage module, wherein the storage module stores a machine executable program, and when the machine executable program is executed by the processing module, it is used to implement the control method according to any one of claims 1 to 9.

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