Method and control device for power saving control of an air conditioner

Abstract

The application provides an energy-saving control method and control device of an air conditioner. In the method provided by the application, when the air conditioner enters an energy-saving mode, the ambient temperature of the environment where the air conditioner is located is acquired first, the temperature difference between the ambient temperature and a target temperature is calculated, then the working time length of the air conditioner is acquired, and finally the percentage of the compressor frequency reduction is determined according to the heat exchange mode of the air conditioner, the working time length and the temperature difference, and the compressor frequency is reduced according to the percentage of the compressor frequency reduction, so as to avoid the frequent start and stop of the compressor, reduce the consumption of the air conditioner, and realize the energy-saving operation of the air conditioner.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioner energy saving technology, and in particular, to an energy saving control method and device for an air conditioner. BACKGROUND

[0002] With the development of air conditioning technology, variable frequency air conditioners are becoming more and more popular among consumers. When a variable frequency air conditioner is running, it will automatically adjust the compressor frequency within a certain range according to the room cooling / heating demand. In order to further achieve energy saving, some air conditioners have an energy saving mode, that is, when a user selects this mode through a remote controller, the air conditioner will run at a fixed low frequency under certain conditions to achieve energy saving. However, on the one hand, this requires the user to manually select this function, and on the other hand, running at this fixed low frequency will also affect the heat exchange effect of the air conditioner and the user experience. SUMMARY

[0003] An object of the present application is to provide an energy saving control method for an air conditioner.

[0004] A further object of the present application is to further achieve energy saving and power saving operation of an air conditioner.

[0005] In particular, the present application provides an energy saving control method for an air conditioner, which comprises:

[0006] After the air conditioner enters the energy saving mode, the ambient temperature of the environment where the air conditioner is located is obtained, and the temperature difference between the ambient temperature and the target temperature is calculated.

[0007] The working time length of the air conditioner is obtained, the percentage decrease of the compressor frequency is determined according to the heat exchange mode of the air conditioner, the working time length and the temperature difference, and the compressor frequency is decreased according to the percentage decrease.

[0008] Optionally, the step of determining the decrease value of the compressor frequency according to the heat exchange mode of the air conditioner, the working time length and the temperature difference comprises:

[0009] If the air conditioner is in cooling mode, it is determined whether the working time length is less than a first preset working time length.

[0010] If yes, it is determined whether the temperature difference is greater than a first preset temperature difference.

[0011] If the temperature difference is greater than the first preset temperature difference, the percentage decrease of the compressor frequency is determined to be a first preset percentage.

[0012] If the temperature difference is less than or equal to the first preset temperature difference, the percentage decrease of the compressor frequency is determined to be a second preset percentage, wherein the second preset percentage is greater than the first preset percentage.

[0013] Optionally, the air conditioner is in a cooling mode and the working time length is less than the first preset working time length, after the step of judging whether the temperature difference is greater than the first preset temperature difference, the method further comprises:

[0014] if the temperature difference is greater than the first preset temperature difference, the target temperature is increased by a first preset temperature value;

[0015] if the temperature difference is less than or equal to the first preset temperature difference, the target temperature is increased by a second preset temperature value and the fan speed is reduced, wherein the second preset temperature value is less than the first preset temperature value, and the target temperature is less than the set temperature.

[0016] Optionally, the air conditioner is in a cooling mode, after the step of judging whether the working time length is less than the first preset working time length, the method further comprises:

[0017] if the working time length is greater than or equal to the first preset working time length, it is judged whether the temperature difference is greater than a second preset temperature difference, wherein the second preset temperature difference is less than the first preset temperature difference;

[0018] if the temperature difference is greater than the second preset temperature difference, a third preset percentage is determined as the percentage of the compressor frequency reduction, wherein the third preset percentage is greater than the first preset percentage and less than the second preset percentage.

[0019] if the temperature difference is less than or equal to the second preset temperature difference, a fourth preset percentage is determined as the percentage of the air conditioner reduction, wherein the fourth preset percentage is greater than the second preset percentage.

[0020] Optionally, the air conditioner is in a cooling mode and the working time length is greater than or equal to the first preset working time length, after the step of judging whether the temperature difference is greater than a second preset temperature difference, the method further comprises:

[0021] if the temperature difference is greater than the second preset temperature difference, the target temperature is increased by a third preset temperature value;

[0022] if the temperature difference is less than or equal to the second preset temperature difference, the target temperature is increased by a fourth preset temperature value and the fan speed is reduced, wherein the third preset temperature value is equal to the second preset temperature value, and the fourth preset temperature value is less than the third preset temperature value.

[0023] Optionally, the step of determining the compressor frequency reduction value according to the heat exchange mode of the air conditioner, the working time length and the temperature difference comprises:

[0024] if the air conditioner is in a heating mode, it is judged whether the working time length is less than a second preset working time length;

[0025] If yes, it is judged whether the temperature difference is greater than a third preset temperature difference;

[0026] If the temperature difference is greater than the third preset temperature difference, a percentage of a decrease of the compressor frequency is determined as a fifth preset percentage;

[0027] If the temperature difference is less than or equal to the third preset temperature difference, the percentage of the decrease of the compressor frequency is determined as a sixth preset percentage, wherein the sixth preset percentage is greater than the fifth preset percentage.

[0028] Optionally, the air conditioner is in a heating mode and the working time length is less than the second preset working time length, after the step of judging whether the temperature difference is greater than the third preset temperature difference, the method further comprises:

[0029] If the temperature difference is greater than the third preset temperature difference, the target temperature is lowered by a fifth preset temperature value;

[0030] If the temperature difference is less than or equal to the third preset temperature difference, the target temperature is lowered by a sixth preset temperature value and the fan speed is reduced, the sixth preset temperature value being less than the fifth preset temperature value.

[0031] Optionally, the air conditioner is in a heating mode, after the step of judging whether the working time length is less than the second preset working time length, the method further comprises:

[0032] If the working time length is greater than or equal to the second preset working time length, it is judged whether the temperature difference is greater than a fourth preset temperature difference, wherein the fourth preset temperature difference is less than the third preset temperature difference;

[0033] If the temperature difference is greater than the fourth preset temperature difference, the percentage of the decrease of the compressor frequency is determined as a seventh preset percentage, wherein the seventh preset percentage is greater than the fifth preset percentage and less than the sixth preset percentage;

[0034] If the temperature difference is less than or equal to the fourth preset temperature difference, the percentage of the decrease of the compressor frequency is determined as an eighth preset percentage, wherein the eighth preset percentage is greater than the sixth preset percentage.

[0035] Optionally, the air conditioner is in a heating mode and the working time length is greater than or equal to the second preset working time length, after the step of judging whether the temperature difference is greater than the fourth preset temperature difference, the method further comprises:

[0036] If the temperature difference is greater than the fourth preset temperature difference, the target temperature is lowered by a seventh preset temperature value;

[0037] If the temperature difference is less than or equal to the fourth preset temperature difference, the target temperature is adjusted downward by a eighth preset temperature value and the fan speed is reduced, wherein the seventh preset temperature value and the sixth preset temperature value are equal, and the eighth preset temperature value is less than the seventh preset temperature value.

[0038] According to another aspect of the present application, there is also provided an electricity-saving control device of an air conditioner, comprising a memory and a processor, wherein a machine executable program is stored in the memory, and the machine executable program is executed by the processor to implement the electricity-saving control method of the air conditioner according to the above-mentioned one.

[0039] In the present application, when the air conditioner enters the electricity-saving mode, the ambient temperature of the environment where the air conditioner is located is first obtained, the temperature difference between the ambient temperature and the target temperature is calculated, then the working time length of the air conditioner is obtained, and finally the percentage of the compressor frequency reduction is determined according to the heat exchange mode of the air conditioner, the working time length and the temperature difference, and the compressor frequency is reduced according to the percentage of the compressor frequency reduction, so as to avoid the frequent start and stop of the compressor and reduce the consumption of the air conditioner, thereby realizing the electricity-saving operation of the air conditioner.

[0040] Further, when the air conditioner is in the cooling mode and the working time length is less than the first preset working time length, if the target temperature is less than the set temperature, and the temperature difference is greater than the first preset temperature difference and the target temperature is less than the first temperature, the target temperature is adjusted upward by the first preset temperature value. If the temperature difference is less than or equal to the first preset temperature difference, the target temperature is adjusted upward by a second preset temperature value and the fan speed is reduced, wherein the second preset temperature value is less than the first preset temperature value, so as to realize the further energy-saving operation of the air conditioner.

[0041] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described.

[0042] The above and other purposes, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the present application taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0043] Some specific embodiments of the present application will be described in detail below with reference to the accompanying drawings, which are exemplary and not limiting. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0044] Figure 1 is a schematic structural block diagram of an electricity-saving control device of an air conditioner according to an embodiment of the present application;

[0045] Figure 2 is a flowchart of an air conditioner power saving control method according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] Exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0047] It should be noted that the technical features in the embodiments and optional embodiments of the present application can be combined with each other without conflict.

[0048] Figure 1 is a schematic structural block diagram of an air conditioner power saving control device according to an embodiment of the present application. Referring to Figure 1 As shown, the air conditioner power saving control device 100 includes a memory 120 and a processor 110, the memory 120 stores a machine executable program 121, and the machine executable program 121 is executed by the processor 110 to implement the air conditioner power saving control method in any one of the following.

[0049] Among them, the control device 100 can be arranged as part of the air conditioner, arranged inside the air conditioner, connected with the controller of the air conditioner through data, and work together. The control device 100 can also be arranged outside the air conditioner, for example, a network side device such as a server, a cloud, etc. can be arranged, and connected with the air conditioner through data. For example, it can also be arranged in the environment where the user is located or the environment around the user, and the connection mode with the air conditioner includes but is not limited to wireless transmission, infrared transmission, ultrasonic transmission, etc.

[0050] Figure 2 is a flowchart of an air conditioner power saving control method according to an embodiment of the present application. Referring to Figure 2 As shown, the air conditioner power saving control method proposed by the present application includes at least the following steps S202, S204.

[0051] Step S202: When the air conditioner enters the power saving mode, the ambient temperature of the environment where the air conditioner is located is obtained, and the temperature difference between the ambient temperature and the target temperature is calculated.

[0052] In this step, the air conditioner can be controlled to enter the power saving mode when receiving the power saving control instruction for the air conditioner, or the air conditioner can be controlled to enter the power saving mode when the set time point is reached.

[0053] Step S204: obtaining the working time length of the air conditioner, determining the percentage of the compressor frequency reduction according to the heat exchange mode of the air conditioner, the working time length and the temperature difference, and reducing the compressor frequency according to the percentage of the compressor frequency reduction.

[0054] In this step, the working time length of the air conditioner refers to the working time length since the air conditioner is started.

[0055] In the embodiment of the application, when the air conditioner enters the power saving mode, the ambient temperature of the environment where the air conditioner is located is obtained first, the temperature difference between the ambient temperature and the target temperature is calculated, then the working time length of the air conditioner is obtained, and finally the percentage of the compressor frequency reduction is determined according to the heat exchange mode of the air conditioner, the working time length and the temperature difference, and the compressor frequency is reduced according to the percentage of the compressor frequency reduction, so as to avoid the frequent start and stop of the compressor, reduce the consumption of the air conditioner, and realize the power saving operation of the air conditioner.

[0056] In some embodiments of the application, the percentage of the compressor frequency reduction according to the heat exchange mode of the air conditioner, the working time length and the temperature difference mentioned in the above step S204 comprises: if the air conditioner is in the cooling mode, determining whether the working time length of the air conditioner is less than a first preset working time length; if the working time length is less than the first preset time length, determining whether the temperature difference between the ambient temperature and the target temperature is greater than a first preset temperature difference; if the temperature difference is greater than the first preset temperature difference, determining that the percentage of the compressor frequency reduction is a first preset percentage; and if the temperature difference is less than or equal to the first preset temperature difference, determining that the percentage of the compressor frequency reduction is a second preset percentage, wherein the second preset percentage is greater than the first preset percentage.

[0057] The first preset time length can be selected as 20-40 min, preferably 30 min, the first preset temperature difference can be selected as 4℃, the first preset percentage can be selected as 20%, the adjusted compressor frequency is 80% of the current operating frequency, and the second preset percentage can be selected as 40%, the adjusted compressor frequency is 60% of the current operating frequency.

[0058] In the cooling mode, if the temperature difference between the ambient temperature and the target temperature is greater than the first preset temperature difference, it indicates that the ambient temperature is high, in this case, the percentage of the compressor frequency reduction is small, and the compressor frequency is reduced less, so that the air conditioner can be operated in the power saving mode while the ambient temperature is reduced as soon as possible. If the temperature difference between the ambient temperature and the target temperature is less than or equal to the first preset temperature difference, it indicates that the ambient temperature is relatively low, and the corresponding percentage of the compressor frequency reduction is relatively large, and the compressor frequency is reduced more, and the compressor is operated at a relatively small frequency to reduce the number of start and stop of the air conditioner, so as to realize the power saving and energy saving operation of the air conditioner.

[0059] In one embodiment of the present application, the air conditioner is in a cooling mode and the working time is less than a first preset working time, after judging whether the temperature difference is greater than a first preset temperature difference, the method further comprises: if the temperature difference is greater than the first preset temperature difference, the target temperature is increased by a first preset temperature value; if the temperature difference is less than or equal to the first preset temperature difference, the target temperature is increased by a second preset temperature value and the fan speed is reduced, wherein the second preset temperature value is less than the first preset temperature value, and the target temperature is less than the set temperature.

[0060] The first preset temperature value can be 3℃, and the second preset temperature value can be 2℃. The set temperature can be 27℃. Generally, the maximum temperature of the air conditioner is 30℃, and if the target temperature is increased by a compensation temperature above the set temperature, the maximum temperature will be exceeded, resulting in the shutdown of the compressor. Therefore, in the embodiment of adjusting the temperature, the target temperature is limited to be less than the set temperature.

[0061] In the case that the air conditioner is in a cooling mode and the working time is less than a first preset working time, if the temperature difference is greater than a first preset temperature difference, the target temperature is increased by a first preset temperature value; if the temperature difference is less than or equal to the first preset temperature difference, the target temperature is increased by a second preset temperature value and the fan speed is reduced, thereby further enabling the air conditioner to operate in an energy-saving and power-saving mode.

[0062] In one embodiment of the present application, the air conditioner is in a cooling mode, after judging whether the working time is less than a first preset working time, the method further comprises: if the working time is greater than or equal to the first preset working time, judging whether the temperature difference is greater than a second preset temperature difference, wherein the second preset temperature difference is less than the first preset temperature difference. If the temperature difference is greater than the second preset temperature difference, the percentage of the decrease of the compressor frequency is determined to be a third preset percentage, wherein the third preset percentage is greater than the first preset percentage and less than the second preset percentage. If the temperature difference is less than or equal to the second preset temperature difference, the percentage of the decrease of the air conditioner is determined to be a fourth preset percentage, wherein the fourth preset percentage is greater than the second preset percentage.

[0063] The second preset temperature difference can be 3℃, the third preset percentage is 30%, the corresponding adjusted compressor frequency is 70% of the current operating frequency, and the fourth preset percentage is 50%, the corresponding adjusted compressor frequency is 50% of the current operating frequency.

[0064] The working time of the air conditioner being greater than the first preset working time indicates that the working time of the air conditioner is relatively long, and the indoor temperature is relatively low. At this time, if the temperature difference is greater than the second preset temperature difference, the percentage of the decrease of the compressor frequency is determined to be a third preset percentage, wherein the third preset percentage is greater than the first preset percentage and less than the second preset percentage. If the temperature difference is less than or equal to the second preset temperature difference, the percentage of the decrease of the air conditioner is determined to be a fourth preset percentage, wherein the fourth preset percentage is greater than the second preset percentage. Thus, the air conditioner can be further enabled to operate in an energy-saving and power-saving mode.

[0065] In one embodiment of the present application, when the air conditioner is in the cooling mode and the working time is greater than or equal to the first preset working time, after determining whether the temperature difference is greater than the second preset temperature difference, the method further comprises: if the temperature difference is greater than the second preset temperature difference, increasing the target temperature by a third preset temperature value; and if the temperature difference is less than or equal to the second preset temperature difference, increasing the target temperature by a fourth preset temperature value and reducing the fan speed, wherein the third preset temperature value is equal to the second preset temperature value, and the fourth preset temperature value is less than the third preset temperature value.

[0066] In one embodiment of the present application, the fourth preset temperature value can be 1℃, and the fan speed can be adjusted to a speed which is one level lower than the current speed.

[0067] Similarly, when the working time of the air conditioner is greater than the first preset working time, it indicates that the working time of the air conditioner is relatively long, and the indoor temperature is relatively low. At this time, if the temperature difference is greater than the second preset temperature difference, the target temperature is increased by a third preset temperature value; and if the temperature difference is less than or equal to the second preset temperature difference, the target temperature is increased by a fourth preset temperature value and the fan speed is reduced, wherein the third preset temperature value is equal to the second preset temperature value, and the fourth preset temperature value is less than the third preset temperature value. This can achieve further energy saving and power saving operation of the air conditioner.

[0068] In one embodiment of the present application, the step S204 of determining the percentage of the compressor frequency reduction according to the heat exchange mode, the working time and the temperature difference of the air conditioner comprises: if the air conditioner is in the heating mode, determining whether the working time is less than a second preset working time; if yes, determining whether the temperature difference is greater than a third preset temperature difference; if the temperature difference is greater than the third preset temperature difference, determining the percentage of the compressor frequency reduction as a fifth preset percentage; and if the temperature difference is less than or equal to the third preset temperature difference, determining the percentage of the compressor frequency reduction as a sixth preset percentage, wherein the sixth preset percentage is greater than the fifth preset percentage.

[0069] In one embodiment of the present application, the second preset working time can be 30 minutes, the third preset temperature difference can be 5℃, the fifth preset percentage can be 20%, and the sixth preset percentage can be 40%.

[0070] In one embodiment of the present application, in the heating mode, when the temperature difference is greater than the third preset temperature difference, it indicates that the ambient temperature is low. At this time, the percentage of the compressor frequency reduction is determined as the fifth preset percentage, which can make the air conditioner operate in power saving mode while the temperature rises rapidly. When the temperature difference is less than or equal to the third preset temperature difference, it indicates that the ambient temperature is relatively high. At this time, the percentage of the compressor frequency reduction is determined as the sixth preset percentage, which can avoid frequent start and stop of the compressor, reduce the consumption of the air conditioner, and achieve power saving operation of the air conditioner.

[0071] In one embodiment of the present application, the air conditioner is in a heating mode and the working time is less than a second preset working time, after judging whether the temperature difference is greater than a third preset temperature difference, further comprising: if the temperature difference is greater than the third preset temperature difference, the target temperature is lowered by a fifth preset temperature value; if the temperature difference is less than or equal to the third preset temperature difference, the target temperature is lowered by a sixth preset temperature value and the fan speed is reduced, and the sixth preset temperature value is less than the fifth preset temperature value.

[0072] In one embodiment of the present application, the air conditioner is in a heating mode and the working time is less than a second preset working time, after judging whether the temperature difference is greater than a third preset temperature difference, further comprising: if the temperature difference is greater than the third preset temperature difference, the target temperature is lowered by a fifth preset temperature value; if the temperature difference is less than or equal to the third preset temperature difference, the target temperature is lowered by a sixth preset temperature value and the fan speed is reduced, and the sixth preset temperature value is less than the fifth preset temperature value.

[0073] In one embodiment of the present application, the air conditioner is in a heating mode and the working time is less than a second preset working time, after judging whether the temperature difference is greater than a third preset temperature difference, further comprising: if the temperature difference is greater than the third preset temperature difference, the target temperature is lowered by a fifth preset temperature value; if the temperature difference is less than or equal to the third preset temperature difference, the target temperature is lowered by a sixth preset temperature value and the fan speed is reduced, and the sixth preset temperature value is less than the fifth preset temperature value.

[0074] In one embodiment of the present application, the air conditioner is in a heating mode and the working time is less than a second preset working time, after judging whether the temperature difference is greater than a third preset temperature difference, further comprising: if the temperature difference is greater than the third preset temperature difference, the target temperature is lowered by a fifth preset temperature value; if the temperature difference is less than or equal to the third preset temperature difference, the target temperature is lowered by a sixth preset temperature value and the fan speed is reduced, and the sixth preset temperature value is less than the fifth preset temperature value.

[0075] In one embodiment of the present application, the air conditioner is in a heating mode and the working time is less than a second preset working time, after judging whether the temperature difference is greater than a third preset temperature difference, further comprising: if the temperature difference is greater than the third preset temperature difference, the target temperature is lowered by a fifth preset temperature value; if the temperature difference is less than or equal to the third preset temperature difference, the target temperature is lowered by a sixth preset temperature value and the fan speed is reduced, and the sixth preset temperature value is less than the fifth preset temperature value.

[0076] In one embodiment of the present application, the air conditioner is in a heating mode and the working time is less than a second preset working time, after judging whether the temperature difference is greater than a third preset temperature difference, further comprising: if the temperature difference is greater than the third preset temperature difference, the target temperature is lowered by a fifth preset temperature value; if the temperature difference is less than or equal to the third preset temperature difference, the target temperature is lowered by a sixth preset temperature value and the fan speed is reduced, and the sixth preset temperature value is less than the fifth preset temperature value.

[0077] In one embodiment of the present application, the air conditioner is in a heating mode and the working time is less than a second preset working time, after judging whether the temperature difference is greater than a third preset temperature difference, further comprising: if the temperature difference is greater than the third preset temperature difference, the target temperature is lowered by a fifth preset temperature value; if the temperature difference is less than or equal to the third preset temperature difference, the target temperature is lowered by a sixth preset temperature value and the fan speed is reduced, and the sixth preset temperature value is less than the fifth preset temperature value.

[0078] In one embodiment of the present application, the air conditioner is in a heating mode and the working time is less than a second preset working time, after judging whether the temperature difference is greater than a third preset temperature difference, further comprising: if the temperature difference is greater than the third preset temperature difference, the target temperature is lowered by a fifth preset temperature value; if the temperature difference is less than or equal to the third preset temperature difference, the target temperature is lowered by a sixth preset temperature value and the fan speed is reduced, and the sixth preset temperature value is less than the fifth preset temperature value.

[0079] The method for controlling power saving of the air conditioner provided by the application comprises the following steps: obtaining the ambient temperature of the environment where the air conditioner is located when the air conditioner enters the power saving mode, calculating the temperature difference between the ambient temperature and the target temperature, obtaining the working time length of the air conditioner, and finally determining the percentage of the compressor frequency reduction according to the heat exchange mode of the air conditioner, the working time length and the temperature difference, and reducing the compressor frequency according to the percentage of the compressor frequency reduction, so as to avoid the frequent start and stop of the compressor, reduce the consumption of the air conditioner, and realize the power saving operation of the air conditioner.

[0080] Further, when the air conditioner is in the refrigeration mode and the working time length is less than the first preset working time length, if the target temperature is less than the set temperature, and the temperature difference is greater than the first preset temperature difference and the target temperature is less than the first temperature, the target temperature is adjusted upward by the first preset temperature value. If the temperature difference is less than or equal to the first preset temperature difference, the target temperature is adjusted upward by the second preset temperature value and the fan speed is reduced, wherein the second preset temperature value is less than the first preset temperature value, so as to realize the further energy saving operation of the air conditioner.

[0081] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: within the spirit and principles of the application, the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the corresponding technical solutions deviate from the protection scope of the application.

Claims

1. An electricity-saving control method of an air conditioner, characterized by comprising: The application relates to an air conditioner energy-saving mode control method. After the air conditioner enters the energy-saving mode, the ambient temperature of the environment where the air conditioner is located is acquired, and the temperature difference between the ambient temperature and a target temperature is calculated; The working time length of the air conditioner is acquired, and the percentage of the compressor frequency reduction is determined according to the heat exchange mode of the air conditioner, the working time length and the temperature difference, and the compressor frequency is reduced according to the percentage of the compressor frequency reduction. The step of determining the compressor frequency reduction value according to the heat exchange mode of the air conditioner, the working time length and the temperature difference comprises the following steps: If the air conditioner is in the cooling mode, it is judged whether the working time length is less than a first preset working time length; If yes, it is judged whether the temperature difference is greater than a first preset temperature difference; If the temperature difference is greater than the first preset temperature difference, the percentage of the compressor frequency reduction is determined as a first preset percentage; If the temperature difference is less than or equal to the first preset temperature difference, the percentage of the compressor frequency reduction is determined as a second preset percentage, wherein the second preset percentage is greater than the first preset percentage; After the step of judging whether the temperature difference is greater than the first preset temperature difference when the air conditioner is in the cooling mode and the working time length is less than the first preset working time length, the following steps are further included: If the temperature difference is greater than the first preset temperature difference, the target temperature is increased by a first preset temperature value; If the temperature difference is less than or equal to the first preset temperature difference, the target temperature is increased by a second preset temperature value and the fan rotating speed is reduced, wherein the second preset temperature value is less than the first preset temperature value, and the target temperature is less than a set temperature.

2. The method of claim 1, wherein, After the step of judging whether the working time length is less than the first preset working time length when the air conditioner is in the cooling mode, the following steps are further included: If the working time length is greater than or equal to the first preset working time length, it is judged whether the temperature difference is greater than a second preset temperature difference, wherein the second preset temperature difference is less than the first preset temperature difference; If the temperature difference is greater than the second preset temperature difference, the percentage of the compressor frequency reduction is determined as a third preset percentage, wherein the third preset percentage is greater than the first preset percentage and less than the second preset percentage; If the temperature difference is less than or equal to the second preset temperature difference, the percentage of the compressor frequency reduction is determined as a fourth preset percentage, wherein the fourth preset percentage is greater than the second preset percentage.

3. The method of claim 2, wherein, After the step of judging whether the temperature difference is greater than the second preset temperature difference when the air conditioner is in the cooling mode and the working time length is greater than or equal to the first preset working time length, the following steps are further included: If the temperature difference is greater than the second preset temperature difference, the target temperature is increased by a third preset temperature value; If the temperature difference is less than or equal to the second preset temperature difference, the target temperature is increased by a fourth preset temperature value and the fan rotating speed is reduced, wherein the third preset temperature value is equal to the second preset temperature value, and the fourth preset temperature value is less than the third preset temperature value.

4. The method of claim 1, wherein, The step of determining the compressor frequency reduction value according to the heat exchange mode of the air conditioner, the working time length and the temperature difference comprises the following steps: If the air conditioner is in the heating mode, it is judged whether the working time length is less than a second preset working time length; If yes, it is judged whether the temperature difference is greater than a third preset temperature difference; If the temperature difference is greater than the third preset temperature difference, a percentage of a decrease of the compressor frequency is determined as a fifth preset percentage; If the temperature difference is less than or equal to the third preset temperature difference, the percentage of the decrease of the compressor frequency is determined as a sixth preset percentage, wherein the sixth preset percentage is greater than the fifth preset percentage.

5. The method of claim 4, wherein, If the temperature difference is greater than the third preset temperature difference, the target temperature is lowered by a fifth preset temperature value; If the temperature difference is less than or equal to the third preset temperature difference, the target temperature is lowered by a sixth preset temperature value and the fan speed is reduced, the sixth preset temperature value being less than the fifth preset temperature value. If the working time length is greater than or equal to the second preset working time length, it is judged whether the temperature difference is greater than a fourth preset temperature difference, wherein the fourth preset temperature difference is less than the third preset temperature difference; 6. The method of claim 5, wherein, If the temperature difference is greater than the fourth preset temperature difference, the percentage of the decrease of the compressor frequency is determined as a seventh preset percentage, wherein the seventh preset percentage is greater than the fifth preset percentage and less than the sixth preset percentage; If the temperature difference is less than or equal to the fourth preset temperature difference, the percentage of the decrease of the compressor frequency is determined as an eighth preset percentage, wherein the eighth preset percentage is greater than the sixth preset percentage. If the temperature difference is greater than the fourth preset temperature difference, the target temperature is lowered by a seventh preset temperature value; If the temperature difference is less than or equal to the fourth preset temperature difference, the target temperature is lowered by an eighth preset temperature value and the fan speed is reduced, wherein the seventh preset temperature value is equal to the sixth preset temperature value and the eighth preset temperature value is less than the seventh preset temperature value.

7. The method of claim 6, wherein, comprising: a memory and a processor, a machine executable program is stored in the memory, and the machine executable program is executed by the processor to realize the power saving control method of the air conditioner according to any one of claims 1 to 7. ​ 8. A power-saving control device for an air conditioner, characterized in that, ​ ​

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