Air conditioning system and control method thereof

Abstract

The invention discloses an air conditioning system and a control method thereof. The control method of the air conditioning system comprises the steps that the outdoor environment temperature is obtained; according to the temperature area range where the outdoor environment temperature is located and the linear relation between the allowable operation highest frequency f of the compressor in the temperature area range and the outdoor environment temperature t, the allowable operation highest frequency of the compressor corresponding to the outdoor environment temperature is determined, and the number of the temperature area ranges is multiple; the linear relations between the highest frequency f of the compressor allowed to operate in the multiple temperature area ranges and the outdoor environment temperature t are different from one another; and the operation frequency of the compressor is adjusted, so that the actual operation frequency of the compressor does not exceed the allowable operation highest frequency of the compressor corresponding to the outdoor environment temperature. According to the control method of the air conditioning system, the performance of the air conditioning system can be better exerted, and the refrigerating capacity of the air conditioning system in the outdoor high-temperature environment is improved.

Description

Technical Field

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

[0002] Due to environmental changes in the past two years, the weather has become increasingly severe, with more and more high-temperature days. Moreover, due to the uncertainty of the pigeon cage design of floors and the installation positions of spaces, the temperature of the air conditioner installation environment has deteriorated. The longer the air conditioning system operates in a high-temperature outdoor environment, usually to ensure the reliability and durable operation of the air conditioning system and the reliability of the compressor operation, the operating frequency of the compressor is very low in high outdoor temperatures. Currently, the operating frequency of the compressor usually decreases step by step in high outdoor temperatures, resulting in poor refrigeration effect of the air conditioning system, difficult to exert the refrigeration capacity of the air conditioning system, difficult to meet the user's usage requirements, and even shutdown in high temperatures, which makes users have no air conditioner available in high temperatures. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a control method for an air conditioning system, which can better exert the performance of the air conditioning system and improve the refrigeration capacity of the air conditioning system in a high-temperature outdoor environment.

[0004] The present invention also provides an air conditioning system.

[0005] The control method for an air conditioning system according to the first aspect embodiment of the present invention includes: obtaining the outdoor ambient temperature; determining the highest allowable operating frequency of the compressor corresponding to the outdoor ambient temperature according to the temperature range of the outdoor ambient temperature and the linear relationship between the highest allowable operating frequency f of the compressor within the temperature range and the outdoor ambient temperature t, where there are multiple temperature ranges, and the linear relationships between the highest allowable operating frequencies f of the compressor within the multiple temperature ranges and the outdoor ambient temperature t are different from each other; adjusting the operating frequency of the compressor so that the actual operating frequency of the compressor does not exceed the highest allowable operating frequency of the compressor corresponding to the outdoor ambient temperature.

[0006] The control method for an air conditioning system according to the embodiment of the present invention can enable the highest allowable operating frequency of the compressor to change with the outdoor ambient temperature while better exerting the performance of the compressor and the air conditioning system, facilitating reliable operation of the compressor while maintaining a more suitable operating frequency, thereby improving energy efficiency, saving energy consumption, and improving the refrigeration effect of the air conditioning system and the user experience when the air conditioning system is used for refrigeration. At the same time, within a single temperature range, the highest allowable operating frequency of the compressor and the outdoor ambient temperature are linearly related, so as to simplify the control logic and reduce the calculation amount while exerting the performance of the air conditioning system.

[0007] In some embodiments, the slopes of the linear relationships between the maximum allowable operating frequency f of the compressor corresponding to multiple temperature ranges and the outdoor ambient temperature t are not equal.

[0008] In some embodiments, multiple temperature ranges include a first temperature range and a second temperature range. Any temperature within the first temperature range is lower than the temperature within the second temperature range, and the slope corresponding to the first temperature range is greater than the slope corresponding to the second temperature range.

[0009] In some embodiments, when t1 ≤ t < t2, f = k1 * t + b1; when t2 ≤ t < t3, f = k2 * t + b2; when t3 ≤ t ≤ t4, f = k3 * t + b3, where k1 > k2 > k3 and b1 < b2 < b3.

[0010] In some embodiments, within the temperature range, the linear relationship between the maximum allowable operating frequency f of the compressor and the outdoor ambient temperature t is f = k * t + b, where k < 0 and b > 0.

[0011] In some embodiments, the compressor has a minimum frequency for stable operation. Adjusting the actual operating frequency of the compressor includes: when the adjusted actual operating frequency of the compressor is less than or equal to the minimum frequency, the compressor operates at the minimum frequency.

[0012] In some embodiments, while performing the step of adjusting the operating frequency of the compressor, it further includes: determining the rotational speed value of the outdoor fan according to the maximum allowable operating frequency of the compressor corresponding to the outdoor ambient temperature and the exhaust pressure of the compressor; controlling the outdoor fan to operate at the rotational speed value.

[0013] In some embodiments, multiple temperature ranges include a first temperature range and a second temperature range. Any temperature within the first temperature range is lower than the temperature within the second temperature range, and the rotational speed value corresponding to the first temperature range is greater than the rotational speed value corresponding to the second temperature range.

[0014] In some embodiments, the air conditioning system further includes an electronic control device. The electronic control device includes an electronic control element and an electronic control radiator. The electronic control radiator is used to dissipate heat from the electronic control element. A refrigerant channel communicating between the condenser and the throttling element of the air conditioning system is formed within the electronic control radiator. The process of determining the linear relationship between the maximum allowable operating frequency f of the compressor within the temperature range and the outdoor ambient temperature t includes: setting multiple outdoor ambient temperatures in the laboratory; determining the maximum allowable operating frequency of the compressor according to the stable operating conditions of the compressor and the stable operating conditions of the electronic control element.

[0015] An air conditioning system according to an embodiment of the second aspect of the present invention includes: an acquisition device for acquiring the outdoor ambient temperature; a processing device for determining the maximum allowable operating frequency of the compressor corresponding to the outdoor ambient temperature according to the temperature range of the outdoor ambient temperature and the linear relationship between the maximum allowable operating frequency f of the compressor within the temperature range and the outdoor ambient temperature t, where there are multiple temperature ranges, and the linear relationships between the maximum allowable operating frequencies f of the compressor within the multiple temperature ranges and the outdoor ambient temperature t are different from each other; a compressor; and an adjustment device for adjusting the operating frequency of the compressor according to the maximum allowable operating frequency of the compressor.

[0016] According to the embodiment of the present invention, while the maximum allowable operating frequency of the compressor changes with the outdoor ambient temperature, it can better exert the performance of the compressor and the performance of the air conditioning system, making it convenient to keep the compressor running reliably while maintaining a more appropriate operating frequency, thereby improving energy efficiency and saving energy consumption. At the same time, when the air conditioning system is used for refrigeration, it can improve the refrigeration effect of the air conditioning system and improve the user experience. At the same time, within a single temperature range, the maximum allowable operating frequency of the compressor and the outdoor ambient temperature are linearly related, so as to reduce the calculation amount while exerting the performance of the air conditioning system.

[0017] In some embodiments, the slopes of the linear relationships between the maximum allowable operating frequencies f of the compressor corresponding to the multiple temperature ranges and the outdoor ambient temperature t are not equal.

[0018] In some embodiments, the multiple temperature ranges include a first temperature range and a second temperature range, any temperature within the first temperature range is lower than the temperature within the second temperature range, and the slope corresponding to the first temperature range is greater than the slope corresponding to the second temperature range.

[0019] In some embodiments, within the temperature range, the linear relationship between the maximum allowable operating frequency f of the compressor and the outdoor ambient temperature t is f = k * t + b, where k < 0 and b > 0.

[0020] In some embodiments, the adjustment device is further configured to adjust the rotational speed value of the outdoor fan according to the maximum allowable operating frequency of the compressor corresponding to the outdoor ambient temperature and the exhaust pressure of the compressor.

[0021] In some embodiments, the multiple temperature ranges include a first temperature range and a second temperature range, any temperature within the first temperature range is lower than the temperature within the second temperature range, and the rotational speed value corresponding to the first temperature range is less than the rotational speed value corresponding to the second temperature range.

[0022] In some embodiments, the air conditioning system further includes: an electronic control device, which includes an electronic control component and an electronic control radiator. The electronic control radiator is used to dissipate heat from the electronic control component, and a refrigerant channel communicating between the condenser and the throttling element of the air conditioning system is formed inside the electronic control radiator.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0025] Figure 1 is a schematic flowchart of a control method for an air conditioning system according to an embodiment of the present invention;

[0026] Figure 2 is a schematic flowchart of a control method for an air conditioning system according to an embodiment of the present invention;

[0027] Figure 3 is a schematic flowchart of a control method for an air conditioning system according to an embodiment of the present invention;

[0028] Figure 4 is a schematic flowchart of a control method for an air conditioning system according to an embodiment of the present invention;

[0029] Figure 5 is a diagram showing the relationship between f and t in an air conditioning system according to an embodiment of the present invention;

[0030] Figure 6 is a schematic diagram of an air conditioning system according to an embodiment of the present invention;

[0031] Figure 7 is a partial schematic diagram of an air conditioning system according to an embodiment of the present invention;

[0032] Figure 8 is Figure 7 another schematic diagram of the partial structure of the air conditioning system shown in;

[0033] Figure 9 is a cross-sectional view taken along the E-E line in Figure 8 ;

[0034] Reference Signs:

[0035] air conditioning system 100,

[0036] Acquisition device 1, processing device 2, compressor 3, regulating device 4, electronic control device 5, electronic control component 51, electronic control radiator 52, heat dissipation plate 521, heat dissipation pipe 522, condenser 6. Detailed implementation manners

[0037] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0038] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0039] Next, with reference to the drawings, a control method of an air-conditioning system 100 according to an embodiment of the present invention will be described.

[0040] As Figures 1-4 shown, the control method of the air-conditioning system 100 includes:

[0041] Step S10, acquiring the outdoor ambient temperature;

[0042] Step S20, determining the highest allowable operating frequency of the compressor 3 corresponding to the outdoor ambient temperature according to the temperature range of the outdoor ambient temperature and the linear relationship between the highest allowable operating frequency f of the compressor 3 within the temperature range and the outdoor ambient temperature t;

[0043] Step S30, adjusting the operating frequency of the compressor 3 so that the actual operating frequency of the compressor 3 does not exceed the highest allowable operating frequency of the compressor 3 corresponding to the outdoor ambient temperature.

[0044] Among them, there are multiple temperature ranges, and the linear relationships between the highest allowable operating frequencies f of the compressor 3 within the multiple temperature ranges and the outdoor ambient temperature t are different from each other; that is to say, the linear relationship between the highest allowable operating frequency f of the compressor 3 within any one of the multiple temperature ranges and the outdoor ambient temperature t is different from the linear relationships between the highest allowable operating frequencies f of the compressor 3 within the remaining temperature ranges and the outdoor ambient temperature t.

[0045] For example, the temperature range has two regions. The linear relationship between f and t within the first temperature region is different from that within the second temperature region. Another example is that the temperature range has three regions, and the linear relationships between f and t within the first, second, and third temperature regions are pairwise different. Of course, the temperature range can also be four or more.

[0046] In other words, there is a linear function relationship between the maximum allowable operating frequency f of the compressor 3 and the outdoor ambient temperature t. If the outdoor ambient temperature t is taken as the x-axis parameter and the maximum allowable operating frequency f of the compressor 3 is taken as the y-axis parameter, that is, the outdoor ambient temperature t is used as the abscissa of the point and the maximum allowable operating frequency f of the compressor 3 is used as the ordinate of the point, its graph is a straight line segment on the plane. That is, each temperature region corresponds to a straight line segment, and the straight line segments corresponding to multiple temperature regions are not on the same straight line.

[0047] Taking the linear relationship between the maximum allowable operating frequency f of the compressor 3 and the outdoor ambient temperature t as f = k*t + b as an example, both k and b are parameters. For different temperature regions, at least one of k and b is different.

[0048] Exemplarily, when the air-conditioning system 100 receives a startup instruction sent by the user through the control terminal, it controls the air-conditioning system 100 to start and operate in the mode set by the user, such as the cooling mode or the heating mode. The current outdoor ambient temperature t' is obtained through the acquisition device 1 (for example, the acquisition device 1 includes a temperature detection structure). Then, according to the current outdoor ambient temperature t', the maximum allowable operating frequency value f' of the compressor 3 is determined. Finally, it is controlled that the actual operating frequency of the compressor 3 does not exceed the above-determined maximum allowable operating frequency f' of the compressor 3. For example, the compressor 3 is controlled to operate at the above-determined maximum frequency value f'. Among them, after obtaining the current outdoor ambient temperature value t' through the acquisition device 1, the temperature region range where it is located can be determined according to the current outdoor ambient temperature t'. Then, according to the temperature region range where the current outdoor ambient temperature t' is located, the linear relationship between the maximum allowable operating frequency f of the compressor 3 corresponding to the current outdoor ambient temperature t' and the outdoor ambient temperature t is obtained, so as to obtain the maximum allowable operating frequency f' of the compressor 3 corresponding to the current outdoor ambient temperature t'.

[0049] It can be seen that the above solution enables the operating frequency of the compressor 3 to be adjusted according to the change of the outdoor ambient temperature obtained in real time. Moreover, since there is a piecewise different linear relationship between the maximum allowable operating frequency of the compressor and the outdoor ambient temperature, which is different from the existing cliff-like relationship between the compressor frequency and the outdoor ambient temperature in different regions (within two adjacent different temperature ranges, the compressor frequency changes in a cliff-like manner. Taking the first temperature range and the second temperature range as an example, within the first temperature range, the compressor frequency is always f1, and within the second temperature range, the compressor frequency is always f2, and f2 is not equal to f1), in this application, the maximum allowable operating frequency of the compressor can better exert the performance of the compressor and the air-conditioning system while changing with the outdoor ambient temperature, facilitating the reliable operation of the compressor while maintaining a more appropriate frequency operation, thereby improving energy efficiency, saving energy consumption, and at the same time, when the air-conditioning system is used for refrigeration, it can improve the refrigeration effect of the air-conditioning system and improve the user experience. At the same time, within a single temperature range, there is a linear relationship between the maximum allowable operating frequency of the compressor and the outdoor ambient temperature, so as to simplify the control logic and reduce the calculation amount while exerting the performance of the air-conditioning system.

[0050] Optionally, the linear relationship between the maximum allowable operating frequency of the compressor 3 within multiple temperature ranges and the outdoor ambient temperature can be pre-written into the air-conditioning system 100, which can be obtained in the laboratory according to different models, types, etc. of the air-conditioning system 100.

[0051] In some embodiments, when the air-conditioning system 100 is used for refrigeration, the higher the outdoor ambient temperature t, the lower the maximum allowable operating frequency f of the compressor 3. Then, the slope of the linear relationship between the maximum allowable operating frequency f of the compressor 3 corresponding to each temperature range and the outdoor ambient temperature t is negative. It can be seen that when the air-conditioning system 100 is in use, the outdoor ambient temperature will change. When the outdoor ambient temperature gradually rises from a lower temperature, the maximum allowable operating frequency of the compressor 3 gradually decreases; when the outdoor ambient temperature gradually decreases from a higher temperature, the maximum allowable operating frequency of the compressor 3 gradually increases. Thus, the maximum allowable operating frequency of the compressor 3 can adapt to the change of the outdoor ambient temperature, so that the air-conditioning system 100 can always operate at the best actual operating frequency, which is beneficial to the air-conditioning system 100 to better exert its performance, improve energy efficiency, save energy consumption, and at the same time improve the refrigeration effect of the air-conditioning system 100.

[0052] In some embodiments, such as Figure 5As shown, there are multiple temperature range areas, and the slopes of the linear relationships between the maximum allowable operating frequency f of the compressor 3 corresponding to the multiple temperature range areas and the outdoor ambient temperature t are not equal. Thus, it is convenient to make the air-conditioning system 100 better adapt to the outdoor ambient temperature. For example, when the air-conditioning system 100 is used for high-temperature refrigeration, that is, when the outdoor ambient temperature is relatively high and the air-conditioning system 100 is used for refrigeration, the higher the outdoor ambient temperature, the higher the usually required refrigeration performance of the air-conditioning system 100, and the lower the usually maximum allowable operating frequency of the compressor 3. Then, in this application, the outdoor ambient temperature is divided into multiple temperature range areas, and the slopes of the linear relationships between f and t in the multiple temperature range areas are not equal. That is to say, for different temperature range areas, if the change in the outdoor ambient temperature is the same, the change in the maximum allowable operating frequency of the compressor 3 is different, which is convenient for the maximum allowable operating frequency of the compressor 3 to better adapt to the outdoor high-temperature environment.

[0053] It can be seen that in the above solution, taking the outdoor ambient temperature t as the abscissa of the point and the maximum allowable operating frequency f of the compressor 3 as the ordinate of the point, the image of the maximum allowable operating frequency f of the compressor 3 corresponding to the outdoor ambient temperature t in each temperature range area is a straight-line segment on the plane, and the straight-line segments corresponding to the multiple temperature range areas are not parallel.

[0054] Exemplarily, as Figure 5 shown, there are three temperature range areas, which are t1≤t<t2, t2≤t<t3, and t3≤t≤t4 respectively. Taking the outdoor ambient temperature t as the abscissa of the point and the maximum allowable operating frequency f of the compressor 3 as the ordinate of the point, the image of the maximum allowable operating frequency f of the compressor 3 corresponding to the outdoor ambient temperature t in each temperature range area is a straight-line segment on the plane, and the three straight-line segments are not parallel.

[0055] Optionally, taking the outdoor ambient temperature t as the abscissa of the point and the maximum allowable operating frequency f of the compressor 3 as the ordinate of the point, the straight-line segments corresponding to the multiple temperature range areas are constructed into a continuous line segment. That is to say, there are no breakpoints and no step changes between the multiple straight-line segments corresponding to the multiple temperature range areas, which is beneficial to further improving the adaptability of the compressor 3 to the outdoor ambient temperature while better exerting the performance of the air-conditioning system 100 and improving the temperature control ability of the air-conditioning system 100.

[0056] Exemplarily, as Figure 5 shown, there are three temperature range areas. The straight-line segments formed by the corresponding relationships between the maximum allowable operating frequency f of the compressor 3 and the outdoor ambient temperature t in the three temperature range areas are line segment AB, line segment BC, and line segment CD respectively. The three line segments are not parallel, and adjacent two line segments intersect at the boundary position of the temperature range area.

[0057] In some embodiments, the multiple temperature region ranges include a first temperature region range and a second temperature region range. Any temperature within the first temperature region range is lower than the temperature within the second temperature region range, and the slope corresponding to the first temperature region range is greater than the slope corresponding to the second temperature region range. Then, if the slopes corresponding to the multiple temperature region ranges are all negative, when the outdoor ambient temperature changes by a unit amount within the first temperature region range, the absolute value of the change amount of the maximum allowable operating frequency of the compressor 3 is Δf1, and when the outdoor ambient temperature changes by a unit amount within the second temperature region range, the absolute value of the change amount of the maximum allowable operating frequency of the compressor 3 is Δf2, then Δf1 < Δf2.

[0058] It can be seen that when the air-conditioning system 100 is used for refrigeration, if the outdoor ambient temperature is higher, then a further small increase in the outdoor ambient temperature will cause a large decrease in the maximum allowable operating frequency of the compressor 3, so that the air-conditioning system 100 can still achieve refrigeration operation under a relatively high outdoor ambient temperature. Thus, it is beneficial to further improve the adaptability of the air-conditioning system 100 to the outdoor ambient temperature and better exert its performance.

[0059] In the above solution, the number of temperature region ranges is not limited to two, and can also be three or more; then in the above solution, the multiple temperature region ranges are arranged in ascending order of temperature, and the slopes corresponding to the multiple temperature region ranges decrease in sequence; if the slope is negative, the slopes corresponding to the multiple temperature region ranges decrease in sequence, which means that the absolute values of the slopes corresponding to the multiple temperature region ranges increase in sequence.

[0060] Exemplarily, as Figure 5 shown, the temperature region range is three. The straight line segments formed by the corresponding relationships between the maximum allowable operating frequency f of the compressor 3 and the outdoor ambient temperature t within the three temperature region ranges are line segment AB, line segment BC, and line segment CD respectively. The three line segments are not parallel, and the slope of line segment AB > the slope of line segment BC > the slope of line segment CD.

[0061] In some embodiments, as Figure 5 shown, when t1 ≤ t < t2, f = k1 * t + b1; when t2 ≤ t < t3, f = k2 * t + b2; when t3 ≤ t ≤ t4, f = k3 * t + b3, where k1 > k2 > k3 and b1 < b2 < b3. That is Figure 5 in the figure, line segment AB corresponds to f = k1 * t + b1, line segment BC corresponds to f = k2 * t + b2, and line segment CD corresponds to f = k3 * t + b3. k1, k2, k3, b1, b2, and b3 are all parameters and can be obtained through pre-experiments and other means.

[0062] Exemplarily, the unit of the outdoor ambient temperature is °C, and the unit of the highest allowable operating frequency of the compressor 3 is Hz; t1 = 45, t2 = 49, t3 = 56, t4 = 61, k1 = -1, b1 = 127, k2 = -2, b2 = 176, k3 = -4.4, b3 = 310.4. With such settings, it is convenient for the air conditioning system 100 to adapt to a wide range of outdoor ambient temperatures, which is beneficial to improving the applicable range of the air conditioning system 100 on the premise of better exerting the performance of the air conditioning system 100.

[0063] In some embodiments, as Figure 5 shown, within the temperature range, the linear relationship between the highest allowable operating frequency f of the compressor 3 and the outdoor ambient temperature t is f = k * t + b, where k < 0, and k is the slope of the linear relationship between the highest allowable operating frequency f of the compressor 3 and the outdoor ambient temperature t within the corresponding temperature range, and b > 0. Thus, the air conditioning system 100 can especially achieve effective refrigeration in the case of high outdoor temperature.

[0064] In some embodiments, as Figure 5 shown, the compressor 3 has a minimum stable operating frequency. Adjusting the actual operating frequency of the compressor 3 includes: when the adjusted actual operating frequency of the compressor 3 is less than or equal to the minimum frequency, the compressor 3 operates at the minimum frequency; that is, when the highest allowable operating frequency of the compressor 3 corresponding to the outdoor ambient temperature determined in step S20 is less than or equal to the minimum frequency, the compressor 3 operates at the minimum frequency. Thus, on the premise of improving the performance of the air conditioning system 100, the air conditioning system 100 can still operate normally, while protecting the compressor 3, and to a certain extent, it can reduce the situation that the air conditioning system 100 stops due to self - protection.

[0065] Exemplarily, as Figure 5 shown, the temperature range is divided into three regions, namely t1 ≤ t < t2, t2 ≤ t < t3, and t3 ≤ t ≤ t4. When t = t4, the highest allowable operating frequency of the compressor 3 obtained is equal to the minimum frequency, then when t ≥ t4, the compressor 3 operates at the minimum frequency.

[0066] In some embodiments, while performing the step of adjusting the operating frequency of the compressor 3, the control method of the air conditioning system 100 further includes: determining the rotational speed value of the outdoor fan according to the highest allowable operating frequency of the compressor 3 corresponding to the outdoor ambient temperature (i.e., the current outdoor ambient temperature) and the discharge pressure of the compressor 3; controlling the outdoor fan to operate according to the rotational speed value.

[0067] When controlling the compressor 3 to operate at the highest operating frequency, the highest frequency value f' is different according to different outdoor ambient temperature values t', so the actual operating frequency of the compressor 3 is also different; when the compressor 3 is at different operating frequencies, its refrigeration capacity is different, and thus the heat exchanged by the condenser 6 of the air-conditioning system 100 is also different. For example, when the operating frequency of the compressor 3 is very high at 90 Hz, it will output a higher refrigeration capacity than when it is operating at 70 Hz. At this time, more heat exchange needs to be performed on the condenser 6, so the air volume output by the outdoor fan needs to be greater to meet the more heat exchange requirements. Therefore, according to different outdoor ambient temperatures and different highest operating frequencies allowed for the compressor 3, the outdoor fan can be controlled to operate at different rotational speed values to meet the heat exchange requirements of the condenser 6 of the air-conditioning system 100, so that the air-conditioning system 100 outputs the corresponding refrigeration capacity.

[0068] Optionally, the rotational speed value of the outdoor fan is determined according to the current outdoor ambient temperature, the highest operating frequency allowed for the compressor 3 corresponding to the current outdoor ambient temperature, and the discharge pressure of the compressor 3, which is convenient for further optimizing the rotational speed value and making the rotational speed value match the current outdoor ambient temperature, the highest operating frequency allowed for the compressor 3, and the discharge pressure.

[0069] In some embodiments, while performing the step of adjusting the operating frequency of the compressor 3, the control method of the air-conditioning system 100 further includes: determining the rotational speed value of the outdoor fan according to the actual operating frequency of the compressor 3 corresponding to the outdoor ambient temperature and the discharge pressure of the compressor 3; then, controlling the outdoor fan to operate at the rotational speed value, which is convenient for further optimizing the rotational speed value and making the rotational speed value match the actual operating frequency and discharge pressure of the compressor 3.

[0070] In the embodiments of the present application, the discharge pressure of the compressor 3 can be understood as the system pressure of the air-conditioning system 100.

[0071] In some embodiments, the multiple temperature region ranges include a first temperature region range and a second temperature region range. Any temperature within the first temperature region range is lower than the temperature within the second temperature region range, and the rotational speed value corresponding to the first temperature region range is less than the rotational speed value corresponding to the second temperature region range. Thus, it is convenient to make the rotational speed value of the outdoor fan match the heat exchange requirements of the condenser 6 of the air-conditioning system 100, without causing waste of energy consumption and without being unfavorable to the condenser 6 to exert its performance, which is beneficial to achieving the balance between energy efficiency and energy consumption.

[0072] In the above solution, the number of temperature region ranges is not limited to two, and can also be three or more; then in the above solution, the multiple temperature region ranges are arranged in ascending order of temperature, and the rotational speed values corresponding to the multiple temperature region ranges increase in sequence.

[0073] Exemplarily, such asFigure 5 As shown, there are three temperature ranges, namely t1≤t<t2, t2≤t<t3, and t3≤t≤t4. The straight-line segments formed by the corresponding relationships between the maximum allowable frequency f of the compressor 3 and the outdoor ambient temperature t within the three temperature ranges are line segment AB, line segment BC, and line segment CD respectively. The rotational speed value corresponding to line segment AB < the rotational speed value corresponding to line segment BC < the rotational speed value corresponding to line segment CD. Among them, the unit of the rotational speed value is revolutions per minute. When t≤t1, the rotational speed value is 750; when t1<t≤t2, the rotational speed value is 800; when t2<t≤t3, the rotational speed value is 850; when t3<t≤t4, the rotational speed value is 900.

[0074] In some embodiments, as Figure 4 and Figure 7 shown, the air-conditioning system 100 further includes an electric control device 5. The electric control device 5 includes an electric control element 51 (such as a circuit board, etc.) and an electric control radiator 52. The electric control radiator 52 is used to dissipate heat from the electric control element 51, so as to timely dissipate the heat generated by the electric control element 51, reduce the temperature of the electric control element 51, facilitate the electric control element 51 to have a suitable operating temperature, and improve the operating reliability of the electric control element 51; a refrigerant channel communicating between the condenser 6 and the throttling element of the air-conditioning system 100 is formed in the electric control radiator 52. Then, the refrigerant flowing out of the condenser 6 first flows through the refrigerant channel of the electric control radiator 52 to dissipate heat from the electric control element 51 and then flows to the throttling element for pressure reduction and throttling. The throttling element is connected between the refrigerant channel and the evaporator of the air-conditioning system 100. Then, the temperature of the refrigerant after dissipating heat from the electric control element 51 is relatively higher than the temperature of the refrigerant just flowing out of the condenser 6, so as to increase the temperature of the refrigerant flowing to the throttling element, facilitating the refrigerant to better exert its heat exchange capacity.

[0075] Exemplarily, the temperature of the refrigerant flowing out of the condenser 6 is usually lower than the temperature of the electric control element 51. For example, the air-conditioning system 100 is used for refrigeration, the outdoor heat exchanger is the condenser 6, the temperature of the refrigerant flowing out of the condenser 6 is generally in the range of about 50°C to 60°C, while the temperature of the electric control element 51 can reach about 80°C. The temperature of the refrigerant after dissipating heat from the electric control element 51 is relatively higher than the temperature of the refrigerant just flowing out of the condenser 6, so as to better realize refrigerant heat dissipation in the evaporator and improve the refrigeration capacity of the air-conditioning system 100.

[0076] Among them, the determination process of the linear relationship between the highest allowable operating frequency f of the compressor 3 within the temperature range and the outdoor ambient temperature t includes: setting multiple outdoor ambient temperatures in the laboratory; determining the highest allowable operating frequency of the compressor 3 according to the stable operating conditions of the compressor 3 and the stable operating conditions of the electronic control component 51. In other words, the linear relationships between the highest allowable operating frequencies f within multiple temperature ranges and the outdoor ambient temperature t can be determined separately through experiments. At the same time, during the determination process, considering the stable operating conditions of the electronic control component 51, since the refrigerant flows through the electronic control radiator 52 to dissipate heat from the electronic control component 51 and reduce the temperature of the electronic control component 51, the stable operating conditions of the electronic control component can be appropriately relaxed further, which is further beneficial to the air-conditioning system 100 to exert its performance.

[0077] Simply put, if the temperature of the electronic control component 51 can reach 80°C when the refrigerant is not used to dissipate heat from it, and the stable operating condition of the electronic control component 51 is that the temperature of the electronic control component 51 does not exceed 80°C, then the highest allowable operating frequency of the compressor 3 cannot be increased further at this time; after using the refrigerant to dissipate heat from the electronic control component 51, its temperature can be reduced, and it can be reduced to 70°C. At this time, it does not reach the stable operating condition of the electronic control component 51. Then, considering the stable operating conditions of the compressor 3, at this time, on the premise of the stable operation of the compressor 3, the highest allowable operating frequency of the compressor 3 can be appropriately increased further to be beneficial to the air-conditioning system 100 to exert greater performance.

[0078] It can be seen that the method of determining the relationship between f and t in the above solution can take into account the stable operation of both the compressor 3 and the electronic control component 51, so as to reduce the losses of the compressor 3 and the electronic control component 51 while exerting the performance of the air-conditioning system 100.

[0079] In some specific embodiments, in combination with the actual user usage requirements and corresponding design specifications, when the air-conditioning system 100 cools down in high outdoor temperature, the relationship between f and t is determined through experiments. The general process is as follows:

[0080] Under the conditions of meeting the requirements for the stable operation of the compressor and the design specifications of the air-conditioning system, the highest allowable operating frequencies f1, f2, f3, f4 (f1 > f2 > f3 > f4) at which the compressor can operate stably and reliably are measured respectively at outdoor ambient temperatures of t1, t2, t3, t4 (t1 < t2 < t3 < t4); of course, the number of outdoor ambient temperature values can also be more than four.

[0081] Through the optimization of the hardware selection of the air duct and the outdoor fan module, combined with the change of the outdoor ambient temperature, the rotational speed values Pa, Pb, Pc, and Pd (Pa < Pb < Pc < Pd) of the outdoor fan are determined respectively when the outdoor ambient temperatures are t1, t2, t3, and t4 in combination with the actual operating frequency of the compressor and the exhaust pressure of the compressor; it can be understood that multiple rotational speed values can correspond one-to-one with multiple outdoor ambient temperature values, and the number of rotational speed values can also change to more than four following the number of outdoor ambient temperature values taken.

[0082] Taking the outdoor ambient temperature t as the abscissa of the point and the highest allowable operating frequency f of the compressor 3 as the ordinate of the point, the coordinates of four points are obtained, A(t1, f1), B(t2, f2), C(t3, f3), D(t4, f4), where t1 = 45, t2 = 49, t3 = 56, t4 = 61, f1 = 82, f2 = 78, f3 = 64, f4 = 42, as Figure 5 shown, connect AB, BC, CD, and the line segment CD intersects the horizontal line at the lowest frequency at point D, where the lowest frequency can be determined according to the stable operating conditions of the compressor and the stable operating conditions of the electronic control components.

[0083] Set the linear relationships corresponding to the line segments AB, BC, and CD in the air-conditioning system, so that the air-conditioning system can judge the temperature range of the current outdoor ambient temperature according to the detected change of the outdoor ambient temperature, obtain the linear relationship between f and t corresponding to the temperature range, and thus calculate the highest allowable operating frequency of the compressor, and adjust the operating frequency of the compressor so that the compressor operates at the corresponding highest frequency. For example, when the current outdoor ambient temperature is 47, calculate the highest allowable operating frequency of the compressor according to the function relationship corresponding to the line segment AB; when the current outdoor ambient temperature is 58, calculate the highest allowable operating frequency of the compressor according to the function relationship corresponding to the line segment CD; when the current outdoor ambient temperature is 61 or greater than 61, the compressor operates at the lowest frequency until the prototype is protected.

[0084] According to the air-conditioning system 100 of the second aspect embodiment of the present invention, it includes an acquisition device 1, a processing device 2, a compressor 3, and an adjustment device 4. The acquisition device 1 is used to acquire the outdoor ambient temperature, the processing device 2 is used to determine the highest allowable operating frequency of the compressor 3 corresponding to the outdoor ambient temperature according to the temperature range where the outdoor ambient temperature is located and the linear relationship between the highest allowable operating frequency f of the compressor 3 and the outdoor ambient temperature t within the temperature range, and the adjustment device 4 is used to adjust the operating frequency of the compressor 3 according to the highest allowable operating frequency of the compressor 3.

[0085] Among them, there are multiple temperature range areas, and the linear relationships between the highest allowable operating frequency f of the compressor 3 within multiple temperature range areas and the outdoor ambient temperature t are different from each other; that is, the linear relationship between the highest allowable operating frequency f of the compressor 3 and the outdoor ambient temperature t within any one of the multiple temperature range areas is different from the linear relationship between the highest allowable operating frequency f of the compressor 3 and the outdoor ambient temperature t within the remaining temperature range areas.

[0086] In other words, there is a linear function relationship between the highest allowable operating frequency f of the compressor 3 and the outdoor ambient temperature t. If the outdoor ambient temperature t is used as the x-axis parameter and the highest allowable operating frequency f of the compressor 3 is used as the y-axis parameter, that is, the outdoor ambient temperature t is used as the abscissa of the point and the highest allowable operating frequency f of the compressor 3 is used as the ordinate of the point, its image is a straight line segment on the plane, that is, each temperature range area corresponds to a straight line segment, and the straight line segments corresponding to multiple temperature range areas are not located on the same straight line.

[0087] Taking the linear relationship between the highest allowable operating frequency f of the compressor 3 and the outdoor ambient temperature t as f = k * t + b as an example, both k and b are parameters, and for different temperature range areas, at least one of k and b is not equal.

[0088] According to the air-conditioning system 100 of the embodiment of the present invention, while the highest allowable operating frequency of the compressor changes with the outdoor ambient temperature, it can better exert the performance of the compressor and the performance of the air-conditioning system, facilitating the reliable operation of the compressor while maintaining a more suitable frequency operation, thereby improving energy efficiency, saving energy consumption, and at the same time, when the air-conditioning system is used for refrigeration, it can improve the refrigeration effect of the air-conditioning system and improve the user experience. At the same time, within a single temperature range area, there is a linear relationship between the highest allowable operating frequency of the compressor and the outdoor ambient temperature, so as to reduce the calculation amount while exerting the performance of the air-conditioning system.

[0089] Optionally, the linear relationships between the highest allowable operating frequencies of the compressor 3 within multiple temperature range areas and the outdoor ambient temperature can be pre-written into the air-conditioning system 100 before the air-conditioning system 100 leaves the factory, and they can be obtained in the laboratory according to different models, types, etc. of the air-conditioning system 100.

[0090] In some embodiments, the slopes of the linear relationships between the highest allowable operating frequencies f of the compressors 3 corresponding to multiple temperature range areas and the outdoor ambient temperature t are not equal.

[0091] In some embodiments, the multiple temperature range areas include a first temperature range area and a second temperature range area. Any temperature within the first temperature range area is lower than the temperature within the second temperature range area, and the slope corresponding to the first temperature range area is greater than the slope corresponding to the second temperature range area.

[0092] In some embodiments, within the temperature range, the linear relationship between the maximum allowable operating frequency f of the compressor 3 and the outdoor ambient temperature t is f = k*t + b, where k < 0 and b > 0.

[0093] In some embodiments, the adjusting device 4 is further configured to adjust the rotational speed value of the outdoor fan according to the maximum allowable operating frequency of the compressor 3 corresponding to the outdoor ambient temperature and the discharge pressure of the compressor 3, so that the rotational speed value of the outdoor fan matches the maximum allowable operating frequency of the compressor 3 and the discharge pressure of the compressor 3.

[0094] Since when the compressor 3 operates at the maximum allowable operating frequency, according to different outdoor ambient temperature values t', its maximum frequency value f' is different, and thus the actual operating frequency of the compressor 3 is also different; when the compressor 3 is at different operating frequencies, its refrigeration capacity is different, and therefore the heat exchanged by the condenser 6 of the air-conditioning system 100 is also different. For example, when the operating frequency of the compressor 3 is very high at 90 Hz, it will output a higher refrigeration capacity than when operating at 70 Hz. At this time, more heat exchange needs to be performed on the condenser 6, and thus a greater air volume needs to be output by the outdoor fan to meet the greater heat exchange demand. Therefore, according to different outdoor ambient temperatures and different maximum allowable operating frequencies of the compressor 3, the adjusting device 4 is used to adjust the rotational speed value of the outdoor fan to meet the heat exchange demand of the condenser 6 of the air-conditioning system 100, so that the air-conditioning system 100 outputs the corresponding refrigeration capacity.

[0095] Optionally, the adjusting device 4 is configured to determine the rotational speed value of the outdoor fan according to the current outdoor ambient temperature, the maximum allowable operating frequency of the compressor 3 corresponding to the current outdoor ambient temperature, and the discharge pressure of the compressor 3, which is convenient for further optimizing the rotational speed value and making the rotational speed value match the current outdoor ambient temperature, the maximum allowable operating frequency of the compressor 3, and the discharge pressure.

[0096] In some embodiments, the adjusting device 4 is further configured to determine the rotational speed value of the outdoor fan according to the actual operating frequency of the compressor 3 corresponding to the outdoor ambient temperature and the discharge pressure of the compressor 3, which is convenient for further optimizing the rotational speed value and making the rotational speed value match the actual operating frequency and the discharge pressure of the compressor 3.

[0097] In some embodiments, the multiple temperature ranges include a first temperature range and a second temperature range. Any temperature within the first temperature range is lower than the temperature within the second temperature range, and the rotational speed value corresponding to the first temperature range is less than the rotational speed value corresponding to the second temperature range. Thus, it is convenient to make the rotational speed value of the outdoor fan match the heat exchange demand required by the condenser 6 of the air-conditioning system 100, without causing waste of energy consumption and without being disadvantageous to the condenser 6 in exerting its performance, which is beneficial to achieving a balance between energy efficiency and energy consumption.

[0098] In the above solution, the number of temperature range regions is not limited to two, and can also be three or more. Then, in the above solution, a plurality of temperature range regions are arranged in ascending order of temperature, and the corresponding rotational speed values of the plurality of temperature range regions increase in sequence.

[0099] Exemplarily, as Figure 5 shown, the number of temperature range regions is three. The straight line segments formed by the corresponding relationships between the maximum allowable operating frequency f of the compressor 3 within the three temperature range regions and the outdoor ambient temperature t are line segment AB, line segment BC, and line segment CD respectively. The rotational speed value corresponding to line segment AB < the rotational speed value corresponding to line segment BC < the rotational speed value corresponding to line segment CD.

[0100] In some embodiments, as Figures 6-9 shown, the air conditioning system 100 further includes: an electric control device 5. The electric control device 5 includes an electric control element 51 and an electric control radiator 52. The electric control radiator 52 is used to dissipate heat from the electric control element 51, so as to timely dissipate the heat generated by the electric control element 51, reduce the temperature of the electric control element 51, facilitate the electric control element 51 to have a suitable operating temperature, and improve the operating reliability of the electric control element 51. A refrigerant channel communicating between the condenser 6 and the throttling element of the air conditioning system 100 is formed in the electric control radiator 52. Then, the refrigerant flowing out of the condenser 6 first flows through the refrigerant channel of the electric control radiator 52 to dissipate heat from the electric control element 51 and then flows to the throttling element for pressure reduction and throttling. The throttling element is connected between the refrigerant channel and the evaporator of the air conditioning system 100. The temperature of the refrigerant after dissipating heat from the electric control element 51 is relatively higher than the temperature of the refrigerant just flowing out of the condenser 6, thereby increasing the temperature of the refrigerant flowing to the throttling element, so as to facilitate the refrigerant to better exert its heat exchange capacity.

[0101] Exemplarily, the temperature of the refrigerant flowing out of the condenser 6 is usually lower than the temperature of the electric control element 51. For example, when the air conditioning system 100 is used for refrigeration, the outdoor heat exchanger is the condenser 6. The temperature of the refrigerant flowing out of the condenser 6 is generally in the range of about 50°C to 60°C, while the temperature of the electric control element 51 can reach about 80°C. The temperature of the refrigerant after dissipating heat from the electric control element 51 is relatively higher than the temperature of the refrigerant just flowing out of the condenser 6, so as to better achieve refrigerant heat dissipation in the evaporator and improve the refrigeration capacity of the air conditioning system 100.

[0102] At this time, since the refrigerant of the air-conditioning system 100 can flow through the refrigerant passage for cooling the electronic control component 51, when determining the linear relationship between the highest allowable operating frequency f of the compressor 3 and the outdoor ambient temperature t within the determined temperature range, the stable operating conditions of the compressor 3 and the stable operating conditions of the electronic control component 51 can be considered simultaneously to determine the highest allowable operating frequency of the compressor 3; meanwhile, during the determination process, considering the stable operating conditions of the electronic control component 51, since the refrigerant flows through the electronic control radiator 52 to cool the electronic control component 51 and reduce the temperature of the electronic control component 51, the stable operating conditions of the electronic control component can be further appropriately relaxed, which further helps the air-conditioning system 100 to exert its performance.

[0103] Simply put, if the temperature of the electronic control component 51 can reach 80°C when the refrigerant is not used to cool it, and the stable operating condition of the electronic control component 51 is that the temperature of the electronic control component 51 does not exceed 80°C, then the highest allowable operating frequency of the compressor 3 cannot be increased further at this time; after using the refrigerant to cool the electronic control component 51, its temperature can be reduced, for example, it can be reduced to 70°C. At this time, the stable operating condition of the electronic control component 51 is not reached. Then, considering the stable operating condition of the compressor 3, the highest allowable operating frequency of the compressor 3 can be further appropriately increased on the premise of the stable operation of the compressor 3 to help the air-conditioning system 100 exert greater performance.

[0104] Optionally, the electronic control radiator 52 includes a heat dissipation plate 521 and a heat dissipation pipe 522. A refrigerant passage is defined inside the heat dissipation pipe 522. The heat dissipation plate 521 is arranged outside the heat dissipation pipe 522 and is in heat conduction cooperation with the heat dissipation pipe 522, so as to increase the heat dissipation area of the electronic control radiator 52. The electronic control component 51 is in heat conduction cooperation with the heat dissipation plate 521, for example, they are in direct contact. Among them, the heat dissipation plate 521 and the heat dissipation pipe 522 can be an integral part or a split part; the heat dissipation plate 521 can wrap at least part of the entire outer peripheral side of the heat dissipation pipe 522.

[0105] Optionally, the electronic control device 5 further includes a support plate. The electronic control component 51 is arranged on the support plate. The support plate is opposite to and spaced from the heat dissipation plate 521 to form a space for accommodating the electronic control component 51 between the support plate and the heat dissipation plate 521. An opening is formed in the circumferential direction of the space, and the heat in the space can also be dissipated through the opening to facilitate the natural heat dissipation of the electronic control component 51. Among them, the opening position and the opening area of the opening can be set according to actual needs.

[0106] It should be noted that the type of the air-conditioning system 100 according to the embodiment of the present application is not limited, and it can be an air-conditioning integrated machine system or an air-conditioning split machine system, such as a window machine system, a cabinet machine system, a wall-mounted machine system, etc.

[0107] Other components and operations of the air conditioning system 100 according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

[0108] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0109] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0110] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0111] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A control method for an air conditioning system, characterized in that, Including: Obtain the outdoor ambient temperature; According to the temperature range of the outdoor ambient temperature and the linear relationship between the highest allowable operating frequency f of the compressor within the temperature range and the outdoor ambient temperature t, determine the highest allowable operating frequency of the compressor corresponding to the outdoor ambient temperature, where there are multiple temperature ranges, and the linear relationships between the highest allowable operating frequencies f of the compressor within the multiple temperature ranges and the outdoor ambient temperature t are different from each other; Adjust the operating frequency of the compressor so that the actual operating frequency of the compressor does not exceed the highest allowable operating frequency of the compressor corresponding to the outdoor ambient temperature.

2. The control method of the air conditioning system according to claim 1, wherein, The slopes of the linear relationships between the highest allowable operating frequencies f of the compressor corresponding to the multiple temperature ranges and the outdoor ambient temperature t are not equal.

3. The control method of the air conditioning system according to claim 2, characterized in that, The multiple temperature ranges include a first temperature range and a second temperature range, any temperature within the first temperature range is lower than the temperature within the second temperature range, and the slope corresponding to the first temperature range is greater than the slope corresponding to the second temperature range.

4. The control method of the air-conditioning system according to claim 3, characterized in that When t1≤t<t2, f = k1*t + b1; When t2≤t<t3, f = k2*t + b2; When t3≤t≤t4, f = k3*t + b3, where k1>k2>k3 and b1<b2<b3.

5. The control method of the air conditioning system according to claim 1, characterized in that, Within the temperature range, the linear relationship between the highest allowable operating frequency f of the compressor and the outdoor ambient temperature t is f = k*t + b, where k<0 and b>0.

6. The control method of the air conditioning system according to claim 1, characterized in that, The compressor has a lowest frequency for stable operation. Adjusting the actual operating frequency of the compressor includes: When the adjusted actual operating frequency of the compressor is less than or equal to the lowest frequency, the compressor operates at the lowest frequency.

7. The control method of the air conditioning system according to claim 1, characterized in that, While performing the step of adjusting the operating frequency of the compressor, it further includes: Determine the rotational speed value of the outdoor fan according to the highest allowable operating frequency of the compressor corresponding to the outdoor ambient temperature and the discharge pressure of the compressor; Control the outdoor fan to operate according to the rotational speed value.

8. The control method of the air conditioning system according to claim 7, characterized in that, The multiple temperature ranges include a first temperature range and a second temperature range, any temperature within the first temperature range is lower than the temperature within the second temperature range, and the rotational speed value corresponding to the first temperature range is less than the rotational speed value corresponding to the second temperature range.

9. The control method of the air conditioning system according to any one of claims 1-8, characterized in that, The air-conditioning system further includes an electronic control device, the electronic control device includes an electronic control element and an electronic control radiator, the electronic control radiator is used to dissipate heat from the electronic control element, and a refrigerant channel communicating between the condenser and the throttling element of the air-conditioning system is formed within the electronic control radiator, The determination process of the linear relationship between the highest allowable operating frequency f of the compressor within the temperature range and the outdoor ambient temperature t includes: Set multiple outdoor ambient temperatures in the laboratory; Determine the highest allowable operating frequency of the compressor according to the stable operating conditions of the compressor and the stable operating conditions of the electronic control element.

10. An air conditioning system, characterized in that, Including: An acquisition device for acquiring the outdoor ambient temperature; A processing device is configured to determine the maximum allowable operating frequency of a compressor corresponding to the outdoor ambient temperature according to the temperature range of the outdoor ambient temperature and the linear relationship between the maximum allowable operating frequency f of the compressor within the temperature range and the outdoor ambient temperature t, where there are multiple temperature ranges, and the linear relationships between the maximum allowable operating frequencies f of the compressor within the multiple temperature ranges and the outdoor ambient temperature t are different from each other; A compressor; An adjusting device is configured to adjust the operating frequency of the compressor according to the maximum allowable operating frequency of the compressor.

11. The air-conditioning system according to claim 10, characterized in that, The slopes of the linear relationships between the maximum allowable operating frequencies f of the compressor corresponding to the multiple temperature ranges and the outdoor ambient temperature t are not equal.

12. The air conditioning system according to claim 11, characterized in that, The multiple temperature ranges include a first temperature range and a second temperature range. Any temperature within the first temperature range is lower than the temperature within the second temperature range, and the slope corresponding to the first temperature range is greater than the slope corresponding to the second temperature range.

13. The air-conditioning system according to claim 10, characterized in that, Within the temperature range, the linear relationship between the maximum allowable operating frequency f of the compressor and the outdoor ambient temperature t is f = k*t + b, where k < 0 and b > 0.

14. The air conditioning system according to claim 10, characterized in that, The adjusting device is further configured to adjust the rotational speed value of an outdoor fan according to the maximum allowable operating frequency of the compressor corresponding to the outdoor ambient temperature and the discharge pressure of the compressor.

15. The air-conditioning system according to claim 14, characterized in that, The multiple temperature ranges include a first temperature range and a second temperature range. Any temperature within the first temperature range is lower than the temperature within the second temperature range, and the rotational speed value corresponding to the first temperature range is less than the rotational speed value corresponding to the second temperature range.

16. The air conditioning system according to any one of claims 10-15, characterized in that, It further includes: An electronic control device, which includes an electronic control component and an electronic control radiator. The electronic control radiator is used to dissipate heat from the electronic control component, and a refrigerant channel is formed within the electronic control radiator and is connected between the condenser and the throttling element of the air conditioning system.

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