Air conditioning system and control method thereof

Abstract

The invention relates to the technical field of air conditioners, particularly provides an air conditioning system and a control method thereof, and aims to solve the problems of frequent compressor frequency change and large air conditioner power fluctuation caused by environment temperature fluctuation of an existing air conditioning system. In order to achieve the purpose, the control method of the air conditioning system comprises the steps that the change amplitude of the power of the air conditioning system within the first preset duration is obtained; and determining whether to reduce power fluctuation according to the power change amplitude. When the amplitude of the power fluctuation is larger than the preset amplitude, the reason of the power fluctuation is compressor frequency adjustment, and the reason of frequency adjustment is environment temperature change; and when the compressor frequency runs to the environment temperature interval where the middle frequency value is located in the fluctuation range, the maximum value of the environment temperature interval used for maximum frequency division is increased, and the minimum value of the environment temperature interval used for maximum frequency division is decreased. The adjusting period can be prolonged, the frequency of the compressor is rapidly stabilized, the power is rapidly stabilized, energy is saved, and the user experience can be enhanced.

Description

Technical Field

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

[0002] Air conditioners have become essential household appliances. In the air conditioner control logic, for different outdoor environmental temperatures, the maximum allowable operating frequency of the compressor varies.

[0003] Under normal circumstances, in different outdoor ambient temperature stages, the maximum operating frequency differs by about 10 - 15 Hz. This function is used to achieve zoning and reliability control of the compressor frequency under different outdoor environmental temperatures.

[0004] However, this function also has drawbacks. When the outdoor environmental temperature is within the frequency division interval value, due to deviations and fluctuations in the outdoor temperature detected by the air conditioner ambient temperature sensor; specifically, when the outdoor environmental temperature is T1, T1 is the division point of the maximum frequency of the compressor; due to differences in the detection of the ambient temperature sensor, the detected value may fluctuate within the range of T1 ± 0.5. At this time, the maximum operating frequency of the compressor will switch between F1 and F2, where F1 and F2 are the maximum frequencies corresponding to adjacent two temperature intervals. This is very likely to cause fluctuations in the compressor operating frequency, waste energy, and affect the user experience.

[0005] Therefore, there is an urgent need for an air conditioning system and a control method therefor to solve the above technical problems. Summary of the Invention

[0006] The present invention aims to solve the above technical problems, that is, to solve the problem that in the existing air conditioning system, due to environmental temperature fluctuations, the compressor frequency changes frequently, and the power of the air conditioner fluctuates greatly.

[0007] In a first aspect, the present invention provides a control method for an air conditioning system, and the control method of the air conditioning system includes the following steps:

[0008] Obtain the change amplitude of the power of the air conditioning system within a first preset duration;

[0009] Determine whether to reduce the power fluctuation according to the power change amplitude.

[0010] In a specific implementation manner of the control method of the above air conditioning system, "determine whether to reduce the power fluctuation according to the power change amplitude" includes:

[0011] When the power fluctuation amplitude is greater than a preset amplitude, determine the cause of the power fluctuation;

[0012] Determine whether to reduce the power fluctuation according to the cause of the power fluctuation.

[0013] In the specific implementation of the control method of the above air-conditioning system, "determine whether to reduce the power fluctuation according to the cause of the power fluctuation" includes:

[0014] When the power fluctuation amplitude is caused by the adjustment of the compressor frequency, determine the cause of the frequency fluctuation;

[0015] Determine whether to reduce the power fluctuation according to the cause of the frequency fluctuation.

[0016] In the specific implementation of the control method of the above air-conditioning system, "determine whether to reduce the power fluctuation according to the cause of the frequency fluctuation" includes:

[0017] When the frequency fluctuation is caused by the ambient temperature fluctuation, reduce the power fluctuation.

[0018] In the specific implementation of the control method of the above air-conditioning system, there are multiple ambient temperature intervals, and each ambient temperature interval corresponds to a maximum frequency; "reduce the power fluctuation of the air-conditioning system" includes:

[0019] When the frequency runs to the ambient temperature interval where the intermediate frequency value in the fluctuation range is located, increase the maximum value of the ambient temperature interval for dividing the maximum frequency and decrease the minimum value;

[0020] Preferably, when the frequency runs to the intermediate frequency value in the fluctuation range, increase the maximum value of the ambient temperature interval for dividing the maximum frequency and decrease the minimum value.

[0021] In the specific implementation of the control method of the above air-conditioning system, the maximum values of multiple ambient temperature intervals are all increased and the minimum values are all decreased; or

[0022] For multiple ambient temperature intervals, the maximum values of at least some of the ambient temperature intervals are increased and the minimum values are decreased

[0023] In the specific implementation of the control method of the above air-conditioning system, "determine whether to reduce the power fluctuation according to the cause of the power fluctuation" includes:

[0024] When the cause of the fluctuation amplitude is the opening fluctuation of the electronic expansion valve, reduce the power fluctuation.

[0025] In the specific implementation of the control method of the above air-conditioning system, "reduce the power fluctuation" includes:

[0026] When the opening of the electronic expansion valve is adjusted to the preset opening interval, increase the opening adjustment period of the electronic expansion valve;

[0027] The preset opening range is smaller than the variation range of the opening of the electronic expansion valve, and the median value of the variation range is within the preset opening range;

[0028] Preferably, when the opening of the electronic expansion valve is adjusted to the median value of the variation range, the opening adjustment period of the electronic expansion valve is increased.

[0029] In the specific implementation manner of the control method of the air-conditioning system described above, the adjustment period is adjusted to twice the original adjustment period.

[0030] In a second aspect, the present invention provides an air-conditioning system, which includes a control module configured to be capable of executing the control method of the air-conditioning system as described above.

[0031] In the case of adopting the above technical solution, the control method of the air-conditioning system of the present invention includes: obtaining the variation amplitude of the power of the air-conditioning system within a first preset time period; determining whether to reduce the power fluctuation according to the power variation amplitude. When the power fluctuation amplitude is greater than the preset amplitude, and the reason for the power fluctuation is the adjustment of the compressor frequency, and the reason for the frequency adjustment is the change in the ambient temperature; when the compressor frequency runs to the ambient temperature interval where the intermediate frequency value within the fluctuation range is located, increase the maximum value of the ambient temperature interval used for dividing the maximum frequency and decrease the minimum value.

[0032] After the maximum value and the minimum value of the ambient temperature interval are adjusted, for two adjacent ambient temperature intervals, the maximum value of the ambient temperature interval with a smaller temperature should be greater than the minimum value of the ambient temperature interval with a larger temperature. When the ambient temperature changes near the original interval point, when the temperature in the ambient temperature interval with a smaller temperature rises to the original interval point, the maximum frequency corresponding to this ambient temperature interval will not be adjusted, so that the frequency of the compressor can continue to run at the current frequency; it will only be adjusted when it continues to rise to the current maximum value, increasing the adjustment period, enabling the compressor frequency to stabilize quickly, and then enabling the power of the air-conditioning system to stabilize quickly, resulting in a smaller power variation amplitude. When the temperature in the ambient temperature interval with a larger temperature drops to the original interval point, the maximum frequency corresponding to this ambient temperature interval will not be adjusted, so that the frequency of the compressor can continue to run at the current frequency; it will only be adjusted when it continues to drop to the current minimum value, increasing the adjustment period, which can avoid frequent and unnecessary adjustments, enabling the compressor frequency to stabilize quickly, and then enabling the power of the air-conditioning system to stabilize quickly, resulting in a smaller power variation amplitude; it can make the air-conditioning system tend to be stable quickly. Unnecessary frequency and power fluctuations are avoided, energy is saved, and the user experience can also be enhanced.

[0033] The intermediate value is the value closest to the stable compressor frequency. After running to the intermediate frequency value and then adjusting the ambient temperature range, the compressor frequency can quickly stabilize to the stable value, thereby making the power of the air-conditioning system relatively stable.

[0034] When the cause of the fluctuation amplitude is the fluctuation of the opening of the electronic expansion valve, when the opening of the electronic expansion valve is adjusted within the preset opening range, the opening adjustment period of the electronic expansion valve is increased; wherein the preset opening range is smaller than the change range of the opening of the electronic expansion valve, and the intermediate value of the change range is within the preset opening range. Increasing the adjustment period can keep the opening of the electronic expansion valve within the preset opening range as much as possible, so as to be closer to the opening stable value; it can make the opening of the electronic expansion valve stabilize quickly; avoid frequent and unnecessary adjustments, thereby making the power of the air-conditioning system stable quickly.

[0035] When the opening of the electronic expansion valve is adjusted to the intermediate opening, the opening adjustment period of the electronic expansion valve is increased. The stable value of the opening after the opening of the electronic expansion valve is stable is closer to the intermediate value, which can make the opening of the electronic expansion valve stabilize quickly, and then make the power of the air-conditioning system stable quickly. Description of the Drawings

[0036] The following describes the preferred embodiments of the present invention in conjunction with the drawings. In the drawings:

[0037] Figure 1 is the main flowchart of the control method of the air-conditioning system provided by the present invention;

[0038] Figure 2 is the detailed flowchart of step S2 "determine whether to reduce the power fluctuation according to the power change amplitude" provided by the present invention;

[0039] Figure 3 is the detailed flowchart of step S22 "determine whether to reduce the power fluctuation according to the cause of the power fluctuation" provided by the present invention;

[0040] Figure 4 is the main flowchart of the control method of the air-conditioning system provided by the present invention. Detailed Embodiments

[0041] The following describes the preferred embodiments of the present invention with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0042] It should be noted that in the description of the present invention, the terms indicating the direction or positional relationship such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the direction or positional relationship shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installation", "setting", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can also be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] When the outdoor ambient temperature is within the frequency division interval value, due to the deviation and fluctuation of the outdoor temperature detected by the air conditioner ambient temperature sensor; specifically, when the outdoor ambient temperature is T1, T1 is the division point of the maximum frequency of the compressor; due to the detection difference of the ambient temperature sensor, the detected value may fluctuate within the range of T1±0.5. At this time, the maximum operating frequency of the compressor will switch between F1 and F2, and F1 and F2 are the maximum frequencies corresponding to two adjacent temperature intervals. It is very likely to cause the fluctuation of the compressor operating frequency, waste energy, and affect the user experience.

[0045] To solve the above problems, this embodiment discloses an air conditioning system, specifically a variable-frequency air conditioning system with both cooling and heating functions. The air conditioning system includes a compressor, a four-way valve, an outdoor heat exchanger, an electronic expansion valve, an indoor heat exchanger, and a control module. The suction port of the compressor is connected to the first interface of the four-way valve, and the discharge port of the compressor is connected to the second interface of the four-way valve. The first side of the outdoor heat exchanger is connected to the third interface of the four-way valve, the second side of the outdoor heat exchanger is connected to the first side of the indoor heat exchanger through the electronic expansion valve, and the second side of the indoor heat exchanger is connected to the fourth interface of the four-way valve. The compressor extracts low-pressure refrigerant from the first interface of the four-way valve, compresses the extracted refrigerant into high-pressure refrigerant, and then outputs it from the second interface of the four-way valve. The four-way valve is selectively connected according to the operating mode of the air conditioning system. In the cooling mode, the first interface and the fourth interface of the four-way valve are connected, and the second interface and the third interface are connected to each other; the compressor can extract the refrigerant flowing out of the indoor heat exchanger, and the refrigerant discharged from the discharge port of the compressor is transported to the outdoor heat exchanger. In the heating mode, the first interface and the third interface of the four-way valve are connected, and the second interface and the fourth interface are connected to each other; the compressor can extract the refrigerant flowing out of the outdoor heat exchanger, and the refrigerant discharged from the discharge port of the compressor is transported to the indoor heat exchanger. Both the outdoor heat exchanger and the indoor heat exchanger have both an evaporator and a condenser, which are respectively used for heat exchange between the refrigerant and indoor and outdoor air, so as to achieve cooling and heating. An outdoor fan is provided on one side of the outdoor heat exchanger to blow air to the outdoor heat exchanger, so that the outdoor heat exchanger can achieve the functions of condensation and evaporation. An indoor fan is provided on one side of the indoor heat exchanger to blow air to the indoor heat exchanger, so that the indoor heat exchanger can achieve the functions of condensation and evaporation.

[0046] In addition, the compressor, the four-way valve, the outdoor heat exchanger, the electronic expansion valve, and the indoor heat exchanger are respectively communicatively connected to the control module, and the control module controls these functional modules. The control module controls the operating frequency of the compressor; the control module can operate the on-off state of the four-way valve and can also control the opening degree of the electronic expansion valve.

[0047] A first temperature sensor is provided at the outdoor heat exchanger for detecting the temperature of the outdoor heat exchanger. A second temperature sensor is provided in the environment where the outdoor heat exchanger is located for detecting the outdoor ambient temperature, so as to control the operating mode of the air-conditioning system and the operating parameters of each module according to the outdoor ambient temperature. A third temperature sensor is provided at the indoor heat exchanger for detecting the temperature of the indoor heat exchanger. A fourth temperature sensor is provided in the environment where the indoor heat exchanger is located for detecting the indoor ambient temperature, so as to control the operating mode of the air-conditioning system and the operating parameters of each module according to the indoor ambient temperature. The first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor are all communicatively connected to the control module, and the detected temperature information can be transmitted to the control module, so that the control module controls the operating mode of the air-conditioning system and the operating parameters of each module according to the temperature information.

[0048] The control module of the control system is configured to be able to execute the control method of the air-conditioning system. As Figure 1 shown, the control method of the air-conditioning system includes the following main steps:

[0049] S1. Obtain the change range of the power of the air-conditioning system within a first preset time period;

[0050] S2. Determine whether to reduce the power fluctuation according to the power change range.

[0051] This control method starts to run during the initial operation of the air-conditioning system, specifically during the period from 40 min to 100 min after startup. In this embodiment, this control method starts to run after 60 min of operation of the air-conditioning system. Regarding the start timing of this control method, it should be noted that although it starts after 60 min in this embodiment, this is not a limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, it can also start after 70 min or 90 min of operation, which does not deviate from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0052] The first preset time period is the first preset time period before the execution of this control method. The first preset time period is 30 min, that is, after 60 min of operation, the power values between 30 min and 60 min are taken and analyzed to determine the change range of the power values. Regarding the value of the first preset time period, it should be noted that although it is 30 min in this embodiment, this is not a limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, the first preset time period can also be 20 min or 40 min, etc., which does not deviate from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0053] Among them, as Figure 2As shown, step S2 "determine whether to reduce the power fluctuation according to the power change amplitude" specifically includes:

[0054] S21. When the power fluctuation amplitude is greater than the preset amplitude, determine the cause of the power fluctuation; the preset amplitude is 8% of the rated power. Regarding the preset amplitude, it should be noted that although it is 8% of the rated power in this embodiment; this is not a limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, the preset amplitude can also be 9% of the rated power, 7% of the rated power, 10% of the rated power, etc., which do not depart from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0055] S22. Determine whether to reduce the power fluctuation according to the cause of the power fluctuation.

[0056] When the power fluctuation amplitude within the first preset time period is greater than the preset amplitude, it means that the air-conditioning system is operating unstably. At this time, it is necessary to determine the cause of the power fluctuation. When the cause is easy to control, adjust the parameter that causes the fluctuation to reduce the power fluctuation.

[0057] Step S2 "determine whether to reduce the power fluctuation according to the power change amplitude" specifically further includes:

[0058] When the power fluctuation amplitude of the air-conditioning system within the first preset time period is not greater than the preset amplitude, then after the second preset time period, determine the change amplitude of the power within the first preset time period again; and make a judgment.

[0059] Among them, as Figure 3 shown, step S22 "determine whether to reduce the power fluctuation according to the cause of the power fluctuation" further includes:

[0060] S221. When the cause of the fluctuation amplitude is caused by the compressor frequency fluctuation, determine the cause of the frequency fluctuation;

[0061] S222. Determine whether to reduce the power fluctuation according to the cause of the frequency fluctuation. There are various reasons for the power fluctuation, and there are various reasons for the compressor frequency fluctuation, which are affected by multiple factors such as the opening of the electronic expansion valve, indoor temperature, ambient temperature, and set temperature. When the power fluctuation is caused by the compressor frequency fluctuation, it can be determined that only when the cause of the frequency fluctuation is easy to control and is an unnecessary frequency fluctuation, will the frequency fluctuation be reduced by adjusting the parameter, and then the power fluctuation will be reduced.

[0062] Among them, step S222, "determine whether to reduce the power fluctuation according to the cause of the frequency fluctuation" specifically includes:

[0063] When the frequency fluctuation is caused by the ambient temperature fluctuation, reduce the power fluctuation.

[0064] Among them, there are multiple ambient temperature ranges, and each ambient temperature range corresponds to a maximum frequency; within the corresponding ambient temperature range, the compressor frequency must be less than the maximum frequency corresponding to this ambient temperature range. When the ambient temperature fluctuates up and down at the interval boundary, it will cause the maximum frequency to change; furthermore, it is very likely to cause the compressor frequency to change.

[0065] Among them, "reducing the power fluctuation" specifically includes:

[0066] When the compressor frequency runs to the ambient temperature range where the intermediate frequency value within the fluctuation range is located, increase the maximum value of the ambient temperature range used for dividing the maximum frequency and decrease the minimum value. After the adjustment is completed, after the second preset time period, determine the power change amplitude again and judge the power change amplitude again.

[0067] Preferably, when the compressor frequency runs to the intermediate frequency value within the fluctuation range, increase the maximum value of the ambient temperature range used for dividing the maximum frequency and decrease the minimum value. At this time, after adjustment, the compressor frequency can be made to run as much as possible at the maximum frequency corresponding to this ambient temperature range. Among them, the intermediate value is the value closest to the stable value of the compressor frequency. Therefore, adjusting the ambient temperature range after running to the intermediate frequency value can make the compressor frequency quickly stabilize to the stable value, and further make the power of the air-conditioning system relatively stable.

[0068] Specifically, the maximum values of multiple ambient temperature ranges are all increased, and the minimum values are all decreased. In this embodiment, preferably, the difference δ for increasing the maximum value of the ambient temperature range is 1°C, and the difference δ for decreasing the minimum value is 1°C. Regarding the increase amount of the maximum value and the decrease amount of the minimum value, it should be noted that although it is 1°C in this embodiment, this is not a limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, those skilled in the art can choose other values, and the increase amount and the decrease amount can also be different.

[0069] After adjusting the maximum and minimum values of the ambient temperature range, for two adjacent ambient temperature ranges, the maximum value Z1 of the ambient temperature range with a smaller temperature should be greater than the minimum value Z2 of the ambient temperature range with a larger temperature. When the ambient temperature changes near Z1 - δ, when the temperature in the ambient temperature range with a smaller temperature rises to (Z1 - δ), the maximum frequency corresponding to this ambient temperature range will not be adjusted, and the frequency of the compressor can continue to operate at the current frequency; it will only be adjusted when it continues to rise to Z1, increasing the adjustment period, enabling the compressor frequency to stabilize quickly, thereby enabling the power of the air-conditioning system to stabilize quickly and making the power change amplitude smaller. When the temperature in the ambient temperature range with a larger temperature drops to (Z2 + δ), the maximum frequency corresponding to this ambient temperature range will not be adjusted, and the frequency of the compressor can continue to operate at the current frequency; it will only be adjusted when it continues to drop to Z2, increasing the adjustment period, which can avoid frequent and unnecessary adjustments, enable the compressor frequency to stabilize quickly, thereby enabling the power of the air-conditioning system to stabilize quickly and making the power change amplitude smaller; it can make the air-conditioning system tend to be stable quickly.

[0070] Although the maximum and minimum values of multiple ambient temperature ranges are adjusted in this embodiment, this is not a limitation of the present invention. On the premise of not deviating from the principle of the present invention, in other embodiments, it can also be that for multiple ambient temperature ranges, the maximum values of at least some ambient temperature ranges increase and the minimum values decrease. Specifically, the ambient temperature range is adjusted to the ambient temperature range where the ambient temperature is located within the first preset duration; this can also enable the compressor frequency to stabilize quickly, so that the air-conditioning system operates quickly and stably.

[0071] Among them, step S2, "Determine whether to reduce the power fluctuation according to the cause of the power fluctuation" further includes:

[0072] S24. When the cause of the fluctuation amplitude is caused by the fluctuation of the electronic expansion valve, reduce the power fluctuation of the air-conditioning system.

[0073] Among them, "reducing the power fluctuation of the air-conditioning system" specifically includes:

[0074] When the opening degree of the electronic expansion valve is adjusted to within the preset opening degree range, increase the opening degree adjustment period of the electronic expansion valve; where the preset opening degree range is smaller than the change range of the opening degree, and the intermediate value of the change range is within the preset opening degree range. After the adjustment is completed, after the second preset duration, determine the power change amplitude again and judge the power change amplitude again.

[0075] Increasing the adjustment period can keep the opening degree of the electronic expansion valve within the preset opening degree range as much as possible, so that it is closer to the opening degree stable value; it can enable the opening degree of the electronic expansion valve to stabilize quickly; avoid frequent and unnecessary adjustments.

[0076] Preferably, in this embodiment, when the opening degree of the electronic expansion valve is adjusted to the middle opening degree, the opening degree adjustment period of the electronic expansion valve is increased. The opening degree stable value after the opening degree of the electronic expansion valve is stable is relatively close to the middle value, which can enable the opening degree of the electronic expansion valve to be quickly stabilized, and further enable the power of the air conditioning system to be quickly stabilized.

[0077] In this embodiment, the adjustment period T is increased to twice the original adjustment period 2T. It should be noted that regarding the increased value of the adjustment period, although the adjustment period is doubled in this embodiment, this is not a limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, those skilled in the art can choose to increase the adjustment period to 1.5T or 3T, etc., which can all enable the opening degree of the electronic expansion valve to be quickly stabilized, and further enable the public of the air conditioning system to be quickly stabilized. This does not depart from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0078] As Figure 4 shown, the control method of this air conditioning system specifically includes the following detailed steps:

[0079] S01. Obtain the change range of the power within the first preset time period;

[0080] S02. Judge whether the power change range is greater than the preset range; if so, perform step S03; if not, perform step S01 after the second preset time period.

[0081] S03. Judge whether the power fluctuation is caused by the change of the compressor frequency; if so, perform step S04; if not, perform step S06;

[0082] S04. Judge whether the adjustment of the compressor frequency is caused by the change of the ambient temperature; if so, perform step S05; if not, perform step S01 after the second preset time period;

[0083] S05. When the compressor frequency runs to the middle frequency value within the fluctuation range, increase the maximum value of the ambient temperature range used for dividing the maximum frequency by δ and decrease the minimum value by δ; perform step S01 after the second preset time period.

[0084] S06. Judge whether the power fluctuation is caused by the change of the opening degree of the electronic expansion valve; if so, perform step S07; if not, perform step S01 after the second preset time period

[0085] S07. When the opening degree of the electronic expansion valve is adjusted to the middle opening degree, increase the adjustment period to twice the original adjustment period; perform step S01 after the second preset time period.

[0086] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A control method for an air conditioning system, characterized in that, It includes the following steps: Obtain the change range of the power of the air conditioning system within the first preset time period; Determine whether to reduce the power fluctuation according to the power change range.

2. The control method of the air conditioning system according to claim 1, characterized in that, "Determine whether to reduce the power fluctuation according to the power change range" includes: When the power fluctuation range is greater than the preset range, determine the cause of the power fluctuation; Determine whether to reduce the power fluctuation according to the cause of the power fluctuation.

3. The control method of the air conditioning system according to claim 2, wherein, "Determine whether to reduce the power fluctuation according to the cause of the power fluctuation" includes: When the power fluctuation range is caused by the adjustment of the compressor frequency, determine the cause of the frequency fluctuation; Determine whether to reduce the power fluctuation according to the cause of the frequency fluctuation.

4. The control method of the air conditioning system according to claim 3, characterized in that, "Determine whether to reduce the power fluctuation according to the cause of the frequency fluctuation" includes: When the frequency fluctuation is caused by the ambient temperature fluctuation, reduce the power fluctuation.

5. The control method of the air conditioning system according to claim 4, wherein, There are multiple ambient temperature ranges, and each ambient temperature range corresponds to a maximum frequency; "Reduce the power fluctuation" includes: When the frequency runs to the ambient temperature range where the intermediate frequency value within the fluctuation range is located, increase the maximum value of the ambient temperature range for dividing the maximum frequency and decrease the minimum value; Preferably, when the frequency runs to the intermediate frequency value within the fluctuation range, increase the maximum value of the ambient temperature range for dividing the maximum frequency and decrease the minimum value.

6. The control method of the air conditioning system according to claim 5, characterized in that, The maximum values of multiple ambient temperature ranges are all increased, and the minimum values are all decreased; or For multiple ambient temperature ranges, the maximum values of at least some of the ambient temperature ranges are increased and the minimum values are decreased.

7. The control method of the air conditioning system according to claim 1, characterized in that, "Determine whether to reduce the power fluctuation according to the cause of the power fluctuation" includes: When the cause of the fluctuation range is the opening degree fluctuation of the electronic expansion valve, reduce the power fluctuation.

8. The control method of the air-conditioning system according to claim 7, characterized in that, "Reduce the power fluctuation" includes: When the opening degree of the electronic expansion valve is adjusted to within the preset opening degree range, increase the opening degree adjustment period of the electronic expansion valve; Wherein the preset opening degree range is smaller than the change range of the opening degree of the electronic expansion valve, and the intermediate value of the change range is within the preset opening degree range; Preferably, when the opening degree of the electronic expansion valve is adjusted to the intermediate value of the change range, increase the opening degree adjustment period of the electronic expansion valve.

9. The control method of the air conditioning system according to claim 8, wherein Adjust the adjustment period to twice the original adjustment period.

10. An air conditioning system, characterized in that, It includes a control module, and the control module is configured to be able to execute the control method of the air conditioning system according to any one of claims 1-9.

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