Air conditioner and control method thereof

Abstract

The application relates to the technical field of air conditioners, and provides an air conditioner and a control method thereof. The control method of the air conditioner comprises the following steps: acquiring an outdoor environment temperature and a set wind speed of an indoor fan; determining an initial wind speed of an outdoor fan and an initial frequency of a compressor when the maximum wind speed of the indoor fan is according to the outdoor environment temperature; adjusting the wind speed of the outdoor fan to a target wind speed and adjusting the frequency of the compressor to a target frequency according to the relationship between the set wind speed and the maximum wind speed; and the first corresponding relationship between the set wind speed and the maximum wind speed, the second corresponding relationship between the target wind speed and the initial wind speed, and the third corresponding relationship between the target frequency and the initial frequency are positively correlated. The operating frequency of the compressor and the wind speed of the outdoor fan are not only related to the outdoor environment temperature, but also related to the set wind speed of the indoor fan; the frequency of the compressor and the wind speed of the outdoor fan are synchronously adjusted according to the set wind speed, system overpressure can be avoided, the service life of the air conditioner is prolonged, and the use experience of the user is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to an air conditioner and its control method. Background Technology

[0002] With economic development, air conditioners have become an indispensable household appliance. An air conditioner consists of a compressor, indoor fan, indoor heat exchanger, outdoor heat exchanger, and outdoor fan. These components work together to switch between heating, cooling, and different fan speed modes to meet various environmental needs. However, in some technologies, adjusting the compressor frequency and outdoor fan speed based on the outdoor ambient temperature often leads to excessive system pressure or high noise levels, severely reducing the air conditioner's lifespan and user experience. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in related technologies. To this end, this invention proposes a control method for an air conditioner, in which the compressor frequency and the outdoor fan speed are not only related to the outdoor ambient temperature but also linked to the set fan speed of the indoor fan. This not only adjusts the pressure of the refrigerant circulation system but also reduces the noise of the outdoor fan, improves the service life of the air conditioner, and enhances the user experience.

[0004] This invention also provides an air conditioner.

[0005] A control method for an air conditioner according to a first aspect embodiment of the present invention includes:

[0006] Obtain the outdoor ambient temperature and the set fan speed of the indoor fan;

[0007] The initial wind speed of the outdoor fan and the initial frequency of the compressor are determined based on the outdoor ambient temperature when the indoor fan reaches its maximum wind speed.

[0008] The wind speed of the outdoor fan is adjusted to the target wind speed according to the relationship between the set wind speed and the maximum wind speed, and the frequency of the compressor is adjusted to the target frequency; wherein, the first correspondence between the set wind speed and the maximum wind speed, the second correspondence between the target wind speed and the initial wind speed, and the third correspondence between the target frequency and the initial frequency are positively correlated.

[0009] According to an embodiment of the present invention, the steps of adjusting the wind speed of the outdoor fan to the target wind speed based on the relationship between the set wind speed and the maximum wind speed, and adjusting the frequency of the compressor to the target frequency, specifically include:

[0010] The calculation parameters of the preset algorithm are determined based on the set wind speed, and the target wind speed and the target frequency corresponding to the set wind speed are determined based on the calculation parameters and the preset algorithm.

[0011] Adjust the wind speed of the outdoor fan to the target wind speed, and adjust the frequency of the compressor to the target frequency.

[0012] According to one embodiment of the present invention, the step of determining the target wind speed and the target frequency corresponding to the set wind speed based on the calculation parameters and the preset algorithm further includes:

[0013] Obtain the minimum wind speed of the outdoor fan;

[0014] If the target wind speed is determined to be less than the minimum wind speed, then the target wind speed is adjusted to the minimum wind speed.

[0015] According to one embodiment of the present invention, the step of adjusting the target wind speed to the minimum wind speed further includes:

[0016] Obtain the minimum frequency of the compressor;

[0017] If the target frequency is determined to be less than the minimum frequency, then the target frequency is adjusted to the minimum frequency.

[0018] According to an embodiment of the present invention, the step of determining the calculation parameters of the preset algorithm based on the set wind speed further includes, prior to:

[0019] Obtain the operating mode of the air conditioner, and determine the preset algorithm based on the operating mode.

[0020] According to an embodiment of the present invention, the step of determining the preset algorithm based on the operating mode specifically includes:

[0021] If the operating mode is determined to be heating mode, then the preset algorithm is the first preset algorithm;

[0022] If the operating mode is determined to be cooling mode, then the preset algorithm is the second preset algorithm.

[0023] According to one embodiment of the present invention, the set wind speed includes a set wind speed level.

[0024] According to one embodiment of the present invention, the steps of adjusting the wind speed of the outdoor fan to the target wind speed based on the relationship between the set wind speed and the maximum wind speed, and adjusting the frequency of the compressor to the target frequency, further include:

[0025] Obtain the compressor's discharge temperature;

[0026] If the exhaust temperature is determined to be greater than the preset exhaust temperature, the frequency of the compressor is adjusted to a safe frequency based on the difference between the exhaust temperature and the preset exhaust temperature.

[0027] According to one embodiment of the present invention, the step of adjusting the compressor frequency to a safe frequency based on the difference between the exhaust temperature and the preset exhaust temperature specifically includes:

[0028] If the difference is determined to be between zero and a first temperature threshold, the frequency of the compressor is adjusted to a first safe frequency.

[0029] If the difference is determined to be between the first temperature threshold and the second temperature threshold, then the frequency of the compressor is adjusted to the second safe frequency.

[0030] If the difference is determined to be greater than the second temperature threshold, the frequency of the compressor is adjusted to the third safe frequency.

[0031] The first safe frequency, the second safe frequency, and the third safe frequency decrease sequentially, and the third safe frequency is greater than or equal to the minimum frequency.

[0032] According to a second aspect embodiment of the present invention, the air conditioner executes the control method of the air conditioner according to a first aspect embodiment of the present invention during operation.

[0033] The above-described one or more technical solutions of this invention have at least one of the following technical effects:

[0034] According to a first aspect of the present invention, the control method for an air conditioner includes the following steps: acquiring the outdoor ambient temperature and the set wind speed of the indoor fan; determining the initial wind speed of the outdoor fan and the initial frequency of the compressor when the indoor fan reaches its maximum wind speed based on the outdoor ambient temperature; adjusting the wind speed of the outdoor fan to a target wind speed based on the relationship between the set wind speed and the maximum wind speed, and adjusting the frequency of the compressor to a target frequency; wherein the first correspondence between the set wind speed and the maximum wind speed, the second correspondence between the target wind speed and the initial wind speed, and the third correspondence between the target frequency and the initial frequency are positively correlated. When the air conditioner is running, the indoor fan, the outdoor fan, and the compressor start operating. The operating frequency of the compressor and the wind speed of the outdoor fan are related not only to the outdoor ambient temperature but also to the wind speed of the indoor fan set by the user. Based on the relationship between the set wind speed and the maximum wind speed of the indoor fan, the frequency of the compressor is adjusted to the target frequency, and the wind speed of the outdoor fan is adjusted to the target wind speed. When the set wind speed is not at its maximum, simultaneously reducing the frequency of the compressor and the wind speed of the outdoor fan can avoid system overpressure caused by excessively high compressor frequency, reduce system pressure, and improve the service life of the air conditioner. At the same time, the wind speed of the outdoor fan is reduced, which not only helps to save energy, but also reduces indoor noise, improves the user experience, and enhances the accuracy of the air conditioner's linkage control. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 Schematic structure of the air conditioner control method provided in the embodiments of the present invention Figure 1 ;

[0037] Figure 2 Schematic structure of the air conditioner control method provided in the embodiments of the present invention Figure 2 ;

[0038] Figure 3 Schematic structure of the air conditioner control method provided in the embodiments of the present invention Figure 3 . Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the invention clearer, the technical solutions of the invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0040] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0042] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] In related technologies, the compressor frequency and outdoor fan speed are adjusted in conjunction with the outdoor ambient temperature. This often results in excessively high system pressure or excessive noise, which seriously reduces the service life of the air conditioner and the user experience.

[0045] Please refer to the control method for an air conditioner provided in the first aspect embodiment of the present invention. Figures 1 to 3 This includes the following steps:

[0046] S100: Obtain the outdoor ambient temperature and the set wind speed of the indoor fan.

[0047] S200. Determine the initial wind speed of the outdoor fan and the initial frequency of the compressor when the indoor fan reaches its maximum wind speed based on the outdoor ambient temperature.

[0048] S300: Adjust the wind speed of the outdoor fan to the target wind speed according to the relationship between the set wind speed and the maximum wind speed, and adjust the frequency of the compressor to the target frequency;

[0049] Among them, the first correspondence between the set wind speed and the maximum wind speed, the second correspondence between the target wind speed and the initial wind speed, and the third correspondence between the target frequency and the initial frequency are positively correlated.

[0050] As is understood, an air conditioner consists of an indoor unit and an outdoor unit, connected by pipes and electrical circuits. The indoor unit contains an indoor fan and an indoor heat exchanger. The indoor fan is located on one side of the heat exchanger and blows air onto it. The fan speed can be adjusted according to the user's needs. The outdoor unit contains a compressor, an outdoor heat exchanger, and an outdoor fan. The outdoor fan is located on one side of the heat exchanger and blows air onto it. The fan speed can be controlled in conjunction with the outdoor ambient temperature and compressor power. The compressor, indoor heat exchanger, expansion valve, and outdoor heat exchanger are sequentially connected via refrigerant piping to form a refrigerant circulation loop. Adjusting the compressor frequency and the expansion valve opening adjusts the pressure of the refrigerant circulation system.

[0051] Both the indoor and outdoor units contain electronic control components. The outdoor unit has a temperature sensing element installed inside or outside, electrically connected to the electronic control components to obtain the outdoor ambient temperature. In other cases, a separate temperature sensing device can be installed outdoors, with its signal connected to the electronic control components of either the outdoor or indoor unit.

[0052] The wind speed of the indoor fan and the outdoor fan can be obtained from the operating voltage and operating current, or determined by detecting the motor speed or the set wind speed level.

[0053] In step S100, the outdoor ambient temperature is obtained through the temperature detection element built into the outdoor unit or an independent temperature detection device, and the set fan speed of the indoor fan is read at the same time. The set fan speed includes the set fan speed level information or speed information, etc.

[0054] In step S200, with the indoor set temperature determined, the outdoor fan speed and compressor frequency can be determined based on the outdoor ambient temperature. The control logic is to maintain efficient heat exchange in the indoor heat exchanger while avoiding excessive system pressure in the refrigerant circulation loop, thus maintaining stable system operation. Simultaneously, the indoor fan speed can be adjusted according to user needs, switching between maximum and minimum speeds. Lower indoor fan speed results in lower heat exchange efficiency in the indoor heat exchanger, higher refrigerant temperature within the heat exchanger, and increased refrigerant pressure in the system. In this case, it is unnecessary for the compressor to maintain a high frequency, and the outdoor fan speed does not need to operate at high speed. In this embodiment of the invention, to maintain stable system operation, when the outdoor ambient temperature is determined, the outdoor fan speed and compressor frequency are adjusted synchronously when switching the indoor fan's set speed. To ensure stable operation of the air conditioner under the current outdoor ambient temperature and different indoor fan speeds, it is necessary to determine the initial outdoor fan speed and the initial compressor frequency at the maximum indoor fan speed. If stable operation can be achieved at the maximum fan speed, then stable operation can still be achieved when the set fan speed is lower than the maximum fan speed.

[0055] In step S300, the outdoor fan speed is adjusted to the target wind speed based on the relationship between the set wind speed and the maximum wind speed, and the compressor frequency is adjusted to the target frequency. Here, the set wind speed and the maximum wind speed form a first correspondence, the target wind speed and the initial wind speed form a second correspondence, and the target frequency and the initial frequency form a third correspondence. These three correspondences are positively correlated, meaning the adjustment magnitudes are positively correlated.

[0056] It can be understood that at any set indoor temperature or working mode, the frequency of the compressor and the wind speed of the outdoor fan can be determined according to the outdoor ambient temperature to ensure the smooth operation of the refrigerant circulation circuit and at the same time have a high heat exchange efficiency. However, the user can adjust the set wind speed of the indoor fan according to their own preferences or needs. As the set wind speed decreases, the heat exchange efficiency of the indoor heat exchanger decreases. If the compressor maintains its original frequency operation, the temperature of the refrigerant in the system increases, and the system pressure increases, which is not conducive to the long-term operation of the air conditioner. Moreover, if the outdoor fan maintains its original wind speed, not only is the energy consumption high, but it also brings a large amount of noise.

[0057] In an embodiment of the present invention, as the set wind speed is adjusted, the frequency of the compressor is synchronously adjusted to the target frequency, and the wind speed of the outdoor fan is adjusted to the target wind speed. Since the first correspondence, the second correspondence, and the third correspondence are positively correlated, the adjustment range of the frequency of the compressor and the adjustment range of the wind speed of the outdoor fan are positively correlated. When the set wind speed meets the user's needs, the compressor is adjusted to an appropriate frequency, and the outdoor fan is adjusted to an appropriate wind speed. It is possible to avoid the system overpressure phenomenon caused by too high frequency of the compressor, reduce the system pressure, and improve the service life of the air conditioner. At the same time, the wind speed of the outdoor fan is synchronously reduced, which not only helps to save energy, but also reduces the noise indoors, improves the user experience, and improves the accuracy of the linkage control of the air conditioner.

[0058] According to an embodiment of the present invention, the step of adjusting the wind speed of the outdoor fan to the target wind speed and adjusting the frequency of the compressor to the target frequency according to the relationship between the set wind speed and the maximum wind speed specifically includes:

[0059] S210. Determine the calculation parameters of the preset algorithm according to the set wind speed, and determine the target wind speed and the target frequency corresponding to the set wind speed according to the calculation parameters and the preset algorithm.

[0060] S220. Adjust the wind speed of the outdoor fan to the target wind speed and adjust the frequency of the compressor to the target frequency.

[0061] In step S210, the preset algorithm is used to realize the positive correlation of the first correspondence, the second correspondence, and the third correspondence. The preset algorithm can be a continuous function relationship or a discrete correspondence relationship. When the set wind speed of the indoor fan is a rotational speed value, the preset algorithm can be a continuous function relationship; when the set wind speed is a wind speed gear, the preset algorithm is a discrete correspondence relationship. For example, if the set wind speed is divided into multiple gears, the gears correspond to the calculation parameters, and different gears correspond to different calculation parameters.

[0062] After the set wind speed is determined, the calculation parameters are determined, and the target wind speed and the target frequency corresponding to the set wind speed can be determined according to the preset algorithm and the calculation parameters.

[0063] In step S220, the outdoor fan speed is adjusted to the target speed, and the compressor frequency is adjusted to the target frequency. At this time, the indoor fan, outdoor fan, and compressor work together to achieve efficient heat exchange while avoiding excessive system pressure.

[0064] According to one embodiment of the present invention, the step of determining the target wind speed and target frequency corresponding to the set wind speed based on calculation parameters and a preset algorithm further includes:

[0065] S211. Obtain the minimum wind speed of the outdoor fan.

[0066] S212. If the target wind speed is determined to be less than the minimum wind speed, then adjust the target wind speed to the minimum wind speed.

[0067] Understandably, the outdoor fan's wind speed can switch between zero and maximum speed to promote heat exchange in the outdoor heat exchanger under different operating modes. In terms of air heat transfer efficiency, the outdoor fan needs to maintain a minimum wind speed or higher to ensure normal air heat exchange. Therefore, if the target wind speed is greater than or equal to the minimum wind speed, the outdoor fan operates at the target wind speed; if the target wind speed is less than the minimum wind speed, the target wind speed is adjusted to the minimum wind speed to maintain normal heat exchange.

[0068] According to one embodiment of the present invention, the step of adjusting the target wind speed to the minimum wind speed further includes:

[0069] S213. Obtain the minimum frequency of the compressor.

[0070] S214. If the target frequency is determined to be less than the minimum frequency, then the target frequency is adjusted to the minimum frequency.

[0071] Understandably, the compressor frequency can switch between zero and maximum frequency, and can be adjusted according to different needs. To maintain the normal operation of the refrigerant circulation loop, ensuring proper refrigerant flow and heat exchange, the compressor has a minimum frequency. Therefore, if the target frequency is greater than or equal to the minimum frequency, the compressor operates at the target frequency; if the target frequency is less than the minimum frequency, the target frequency is adjusted to the minimum frequency to maintain normal heat exchange.

[0072] According to one embodiment of the present invention, the step of determining the calculation parameters of the preset algorithm based on the set wind speed further includes, prior to:

[0073] S201. Obtain the operating mode of the air conditioner and determine the preset algorithm based on the operating mode.

[0074] Understandably, in different operating modes, the indoor fan, outdoor fan, and compressor all adjust synchronously, but the adjustment range will differ. Determining the preset algorithm based on the operating mode allows the air conditioner to maintain stable system pressure in different operating modes.

[0075] According to an embodiment of the present invention, the step of determining a preset algorithm based on an operating mode specifically includes:

[0076] S2011. If the operating mode is determined to be heating mode, then the preset algorithm is the first preset algorithm.

[0077] S2012. If the operating mode is determined to be cooling mode, then the preset algorithm is the second preset algorithm.

[0078] Regarding steps S2011 and S2012, assuming the wind speed is set to five levels, from level one to level five, the initial frequency is H0, the initial wind speed is V0, the target frequency is H1, and the target wind speed is V1, then the following relationship exists:

[0079] In heating mode:

[0080] Set the wind speed to level 1, H1 = H0, V1 = V0;

[0081] Set the wind speed to level two, H1 = 95% H0, V1 = V0 - 0;

[0082] Set the wind speed to level three, H1 = 80% H0, V1 = V0 - 100;

[0083] Set the wind speed to level four, H1 = 70% H0, V1 = V0 - 200;

[0084] Set the wind speed to level 5, H1 = 60%H0, V1 = V0 - 300.

[0085] In cooling mode:

[0086] Set the wind speed to level 1, H1 = H0, V1 = V0;

[0087] Set the wind speed to level two, H1 = 95% H0, V1 = V0 - 0;

[0088] Set the wind speed to level three, H1 = 80% H0, V1 = V0 - 30;

[0089] Set the wind speed to level four, H1 = 70% H0, V1 = V0 - 60;

[0090] Set the wind speed to level 5, H1 = 60%H0, V1 = V0 - 90.

[0091] The air conditioner control method provided in this invention allows the indoor fan, outdoor fan, and compressor to be synchronously adjusted in different operating modes, although the adjustment range may vary. By determining a preset algorithm based on the operating mode, the air conditioner can maintain stable system pressure in different operating modes.

[0092] According to one embodiment of the present invention, the steps of adjusting the wind speed of the outdoor fan to the target wind speed based on the relationship between the set wind speed and the maximum wind speed, and adjusting the frequency of the compressor to the target frequency, further include:

[0093] S410: Obtain the compressor's discharge temperature.

[0094] S420 If the exhaust temperature is determined to be greater than the preset exhaust temperature, the compressor frequency is adjusted to a safe frequency based on the difference between the exhaust temperature and the preset exhaust temperature.

[0095] Understandably, as the set fan speed decreases, the heat exchange efficiency of the indoor heat exchanger drops. Adjusting the compressor frequency to the target frequency can appropriately reduce the pressure within the system. However, in some extreme environments, it is still necessary to monitor the compressor's exhaust temperature to prevent excessive exhaust temperature from causing system overpressure, which can extend the lifespan of the air conditioner.

[0096] The compressor's exhaust temperature is obtained by a temperature sensing element installed at the compressor's exhaust port. When the exhaust temperature is higher than the preset exhaust temperature, the compressor's frequency is adjusted to a safe frequency based on the difference between the exhaust temperature and the preset exhaust temperature, which can maintain the stability of the system pressure.

[0097] According to one embodiment of the present invention, the step of adjusting the compressor frequency to a safe frequency based on the difference between the exhaust temperature and a preset exhaust temperature specifically includes:

[0098] S421. If the difference is determined to be between zero and the first temperature threshold, the compressor frequency is adjusted to the first safe frequency.

[0099] S422. If the difference is determined to be between the first temperature threshold and the second temperature threshold, then the compressor frequency is adjusted to the second safe frequency.

[0100] S423. If the difference is greater than the second temperature threshold, adjust the compressor frequency to the third safe frequency.

[0101] Among them, the first safe frequency, the second safe frequency, and the third safe frequency decrease in sequence, and the third safe frequency is greater than or equal to the minimum frequency.

[0102] Understandably, when the temperature difference is between zero and the first temperature threshold, the system overpressure is not severe. In this case, adjusting the compressor frequency to the first safe frequency and appropriately reducing the compressor frequency is sufficient. When the temperature difference is between the first and second temperature thresholds, the system overpressure is severe. In this case, adjusting the compressor frequency to the second safe frequency requires a significant reduction in the compressor frequency. When the temperature difference is greater than the second temperature threshold, the system overpressure is very severe, posing a risk of failure. Therefore, it is necessary to significantly reduce the compressor frequency or adjust the compressor frequency to the minimum frequency to ensure the safety and stability of the system.

[0103] According to the second aspect embodiment of the present invention, the air conditioner executes the control method of the air conditioner provided in the first aspect embodiment of the present invention during operation.

[0104] The air conditioner provided in this embodiment of the invention, when the indoor set temperature is determined, can determine the outdoor fan speed and compressor frequency based on the outdoor ambient temperature. Its control logic maintains efficient heat exchange in the indoor heat exchanger while avoiding excessive system pressure in the refrigerant circulation loop, thus ensuring stable system operation. Simultaneously, the indoor fan speed can be adjusted according to user needs, switching between maximum and minimum speeds. Lower indoor fan speeds result in lower heat exchange efficiency in the indoor heat exchanger, higher refrigerant temperature within the heat exchanger, and increased refrigerant pressure within the system. In this case, it is unnecessary for the compressor to maintain a high frequency, and the outdoor fan speed does not need to operate at high speed. In this embodiment, to maintain stable system operation, when the outdoor ambient temperature is determined, the outdoor fan speed and compressor frequency are adjusted synchronously when switching the indoor fan speed. To achieve stable operation of the air conditioner at the current outdoor ambient temperature, it is necessary to determine the initial outdoor fan speed and the initial compressor frequency at the maximum indoor fan speed.

[0105] Based on the relationship between the set wind speed and the maximum wind speed, the outdoor fan speed is adjusted to the target wind speed, and the compressor frequency is adjusted to the target frequency. Here, the set wind speed and the maximum wind speed form the first correspondence, the target wind speed and the initial wind speed form the second correspondence, and the target frequency and the initial frequency form the third correspondence. Therefore, the first, second, and third correspondences are positively correlated.

[0106] It can be understood that, at any set indoor temperature or working mode, the frequency of the compressor and the wind speed of the outdoor fan can be determined according to the outdoor ambient temperature to ensure the smooth operation of the refrigerant circulation circuit and at the same time have a high heat exchange efficiency. However, the user can adjust the set wind speed of the indoor fan according to their own preferences or needs. As the set wind speed decreases, the heat exchange efficiency of the indoor heat exchanger decreases. If the compressor maintains its original frequency operation, the refrigerant temperature in the system will increase and the system pressure will increase, which is not conducive to the long-term operation of the air conditioner. Moreover, if the outdoor fan remains at its original wind speed, it will not only result in high energy consumption but also cause relatively large noise.

[0107] In the embodiment of the present invention, as the set wind speed is adjusted, the frequency of the compressor is synchronously adjusted to the target frequency, and the wind speed of the outdoor fan is adjusted to the target wind speed. Since the first correspondence, the second correspondence, and the third correspondence are positively correlated, the adjustment range of the frequency of the compressor and the adjustment range of the wind speed of the outdoor fan are联动 (the word "联动" here seems to be a typo or an inappropriate term, assuming it should be "linked" or "coupled"). When the set wind speed meets the user's needs, the compressor is adjusted to an appropriate frequency and the outdoor fan is adjusted to an appropriate wind speed. It is possible to avoid the system overpressure phenomenon caused by too high frequency of the compressor, reduce the system pressure, and improve the service life of the air conditioner. At the same time, the wind speed of the outdoor fan decreases synchronously, which not only helps to save energy but also reduces the indoor noise and improves the user's experience, and enhances the accuracy of the linkage control of the air conditioner.

[0108] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, include: Obtain the outdoor ambient temperature and the set fan speed of the indoor fan; The initial wind speed of the outdoor fan and the initial frequency of the compressor are determined based on the outdoor ambient temperature when the indoor fan reaches its maximum wind speed. The wind speed of the outdoor fan is adjusted to the target wind speed according to the relationship between the set wind speed and the maximum wind speed, and the frequency of the compressor is adjusted to the target frequency; wherein, the first correspondence between the set wind speed and the maximum wind speed, the second correspondence between the target wind speed and the initial wind speed, and the third correspondence between the target frequency and the initial frequency are positively correlated.

2. The control method for an air conditioner according to claim 1, characterized in that, The steps of adjusting the wind speed of the outdoor fan to the target wind speed based on the relationship between the set wind speed and the maximum wind speed, and adjusting the frequency of the compressor to the target frequency, specifically include: The calculation parameters of the preset algorithm are determined based on the set wind speed, and the target wind speed and the target frequency corresponding to the set wind speed are determined based on the calculation parameters and the preset algorithm. Adjust the wind speed of the outdoor fan to the target wind speed, and adjust the frequency of the compressor to the target frequency.

3. The control method for an air conditioner according to claim 2, characterized in that, The step of determining the target wind speed and the target frequency corresponding to the set wind speed based on the calculation parameters and the preset algorithm further includes: Obtain the minimum wind speed of the outdoor fan; If the target wind speed is determined to be less than the minimum wind speed, then the target wind speed is adjusted to the minimum wind speed.

4. The control method for an air conditioner according to claim 3, characterized in that, The step of adjusting the target wind speed to the minimum wind speed further includes: Obtain the minimum frequency of the compressor; If the target frequency is determined to be less than the minimum frequency, then the target frequency is adjusted to the minimum frequency.

5. The control method for an air conditioner according to any one of claims 2 to 4, characterized in that, The step of determining the calculation parameters of the preset algorithm based on the set wind speed further includes, prior to: Obtain the operating mode of the air conditioner, and determine the preset algorithm based on the operating mode.

6. The control method for an air conditioner according to claim 5, characterized in that, The step of determining the preset algorithm based on the operating mode specifically includes: If the operating mode is determined to be heating mode, then the preset algorithm is the first preset algorithm; If the operating mode is determined to be cooling mode, then the preset algorithm is the second preset algorithm.

7. The control method for an air conditioner according to any one of claims 1 to 4, characterized in that, The set wind speed includes the set wind speed level.

8. The control method for an air conditioner according to any one of claims 1 to 4, characterized in that, The steps of adjusting the wind speed of the outdoor fan to the target wind speed based on the relationship between the set wind speed and the maximum wind speed, and adjusting the frequency of the compressor to the target frequency, further include: Obtain the compressor's discharge temperature; If the exhaust temperature is determined to be greater than the preset exhaust temperature, the frequency of the compressor is adjusted to a safe frequency based on the difference between the exhaust temperature and the preset exhaust temperature.

9. The control method for an air conditioner according to claim 8, characterized in that, The step of adjusting the compressor frequency to a safe frequency based on the difference between the exhaust temperature and the preset exhaust temperature specifically includes: If the difference is determined to be between zero and a first temperature threshold, the frequency of the compressor is adjusted to a first safe frequency. If the difference is determined to be between the first temperature threshold and the second temperature threshold, then the frequency of the compressor is adjusted to the second safe frequency. If the difference is determined to be greater than the second temperature threshold, the frequency of the compressor is adjusted to the third safe frequency. The first safety frequency, the second safety frequency, and the third safety frequency decrease sequentially, and the third safety frequency is greater than or equal to the minimum frequency of the compressor.

10. An air conditioner, characterized in that, The air conditioner is operated by performing the control method of the air conditioner as described in any one of claims 1 to 9.

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