Control method and device for air conditioner, air conditioner

Abstract

The application relates to the technical field of intelligent household appliances, and discloses a control method for an air conditioner. The method comprises the following steps: obtaining the exhaust temperature of a compressor of the air conditioner; determining a target adjustment parameter of the air conditioner according to the exhaust temperature of the compressor; and adjusting the operation parameter of the air conditioner according to the target adjustment parameter. The method determines the target adjustment parameter of the air conditioner according to the exhaust temperature of the compressor, and then reflects the exhaust state of the compressor according to the target adjustment parameter, thereby improving the accuracy and stability of the judgment parameter. Therefore, the operation parameter of the air conditioner is adjusted according to the target adjustment parameter, the exhaust state of the compressor can be accurately and stably determined by avoiding the fluctuation of the exhaust temperature of the compressor or the delay of the exhaust temperature of the compressor in reflecting the exhaust state of the compressor, the frequency of compressor shutdown is reduced, and the stability of the air conditioner operation is improved. The application further discloses a control device for the air conditioner and the air conditioner.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent household appliances, for example to a control method and device for an air conditioner and an air conditioner. BACKGROUND

[0002] At present, air conditioners are prone to abnormal exhaust during use, which can cause damage to the compressor.

[0003] To avoid damage to the compressor due to abnormal exhaust temperature, a control method for an air conditioner is disclosed in the related art. The control method detects the exhaust temperature by using a temperature sensing bag to protect the compressor. When the exhaust temperature reaches the high-temperature protection threshold, the compressor will be immediately shut down to protect the compressor.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that the related art at least has the following problems: although the related art can protect the compressor by shutting down the compressor, the related art will frequently trigger high-temperature protection when the detected exhaust temperature fluctuates around the temperature threshold, and the compressor will frequently shut down and start, which can cause the compressor to not work normally.

[0005] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0006] To have a basic understanding of some aspects of the disclosed embodiments, a brief overview is given below. The overview is not a comprehensive review of the application, nor is it intended to identify key / important elements or delineate the scope of the embodiments. Instead, the purpose of the overview is to serve as an introduction to the detailed description below.

[0007] The embodiments of the present disclosure provide a control method and device for an air conditioner and an air conditioner to reduce the frequent start and stop of the compressor and improve the working effect of the compressor.

[0008] In some embodiments, the control method for an air conditioner comprises: obtaining the exhaust temperature of the compressor of the air conditioner; determining the target adjustment parameter of the air conditioner according to the exhaust temperature of the compressor; and adjusting the operating parameter of the air conditioner according to the target adjustment parameter.

[0009] Optionally, the target adjustment parameter comprises a discharge pressure and a discharge temperature of the compressor, or a suction pressure and the discharge temperature of the compressor, and a condenser temperature of the air conditioner; the target adjustment parameter of the air conditioner is determined according to the discharge temperature of the compressor, comprising: in a case that the discharge temperature is greater than or equal to a first preset temperature, determining the target adjustment parameter of the air conditioner as the discharge pressure and the discharge temperature of the compressor; in a case that the discharge temperature is less than a second preset temperature, determining the target adjustment parameter of the air conditioner as the suction pressure and the discharge temperature of the compressor, and the condenser temperature of the air conditioner; wherein the first preset temperature is greater than or equal to the second preset temperature.

[0010] Optionally, the operation parameter of the air conditioner comprises an electronic expansion valve opening degree of the air conditioner and / or a compressor frequency of the air conditioner; in a case that the target adjustment parameter is the discharge pressure and the discharge temperature of the compressor, the operation parameter of the air conditioner is adjusted according to the target adjustment parameter, comprising: in a case that T d <T3, and P d 1 d ≥ T3, and P d > P2, adjusting the compressor frequency; wherein T d is the discharge temperature of the compressor, T3 is a third preset temperature, P d is the discharge pressure of the compressor, P1 is a first preset pressure, and P2 is a second preset pressure, and P1

[0011] Optionally, the electronic expansion valve opening degree is adjusted according to the outdoor environment temperature, comprising: calculating ΔA1=k×T ao , to obtain a first opening degree compensation value; wherein ΔA1 is the first opening degree compensation value, k is a compensation coefficient, and T ao is the outdoor environment temperature; calculating A1=A0+ΔA1, to obtain a first target electronic expansion valve opening degree; wherein A1 is the first target electronic expansion valve opening degree, and A0 is a current electronic expansion valve opening degree; and adjusting the electronic expansion valve opening degree to the first target electronic expansion valve opening degree.

[0012] Optionally, the compressor frequency is adjusted, comprising: based on a current operation frequency of the compressor, controlling the compressor to be adjusted to a first operation frequency at a first frequency compensation rate.

[0013] Optionally, the compressor frequency is adjusted, further comprising: calculating ΔF1=F0-F1, to obtain a cumulative frequency reduction value of the compressor; wherein ΔF1 is the cumulative frequency reduction value, F0 is the current operation frequency, and F1 is the first operation frequency; in a case that the cumulative frequency reduction value of the compressor is greater than or equal to a first frequency, controlling the compressor to operate at the first operation frequency for a first preset time length.

[0014] Optionally, the operation parameter of the air conditioner comprises an electronic expansion valve opening degree of the air conditioner and / or a compressor frequency of the air conditioner; in a case where the target regulation parameter is a back gas pressure of the compressor and an exhaust temperature of the compressor and a condenser temperature of the air conditioner, adjusting the operation parameter of the air conditioner according to the target regulation parameter comprises: calculating a temperature difference △T=T d -T c , obtaining a temperature difference between the exhaust temperature of the compressor and the condenser temperature; wherein, △T is the temperature difference, T d is the exhaust temperature of the compressor, and T c is the condenser temperature; in a case where P s P4, T4≤△T r1 t2, adjusting the electronic expansion valve opening degree; in a case where P s P3, and △T s is the back gas pressure of the compressor, P3 is a third preset pressure, P4 is a fourth preset pressure, T4 is a fourth preset temperature, T5 is a fifth preset temperature, t r1 is a duration of the air conditioner in a case where P s P4, T4≤△T

[0015] Optionally, adjusting the compressor frequency comprises: in a case where P s P5, △T≥T6, and t r2 t3, controlling the compressor to perform frequency adjustment to a second operation frequency at a second frequency compensation rate based on a current operation frequency of the compressor; wherein, P5 is a fifth preset pressure, and P5 r2 P5, △T≥T6, t3 is a third preset duration. s

[0016] In some embodiments, a control device for an air conditioner comprises a processor and a memory storing program instructions, the processor is configured to execute a control method for an air conditioner as described above when running the program instructions.

[0017] In some embodiments, an air conditioner comprises: an air conditioner body; a compressor arranged in the air conditioner body; an electronic expansion valve arranged in the air conditioner body; and a control device for an air conditioner as described above, which is installed in the air conditioner body.

[0018] The control method, device and air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0019] ​The target adjustment parameter of the air conditioner is determined by the compressor discharge temperature, and the state of the compressor discharge is reflected by the target adjustment parameter, so as to improve the accuracy and stability of the judgment parameter. Therefore, the operation parameter of the air conditioner is adjusted according to the target adjustment parameter, so as to avoid the fluctuation of the compressor discharge temperature or the delay of the compressor discharge temperature in reflecting the state of the compressor discharge, to accurately and stably determine the state of the compressor discharge, thereby reducing the frequency of the compressor shutdown, and further improving the stability of the air conditioner operation.

[0020] The foregoing general description and the following description are only exemplary and explanatory, and are not intended to limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] One or more embodiments are exemplarily illustrated by the corresponding drawings, which are not intended to limit the embodiments, the elements with the same reference numerals in the drawings are shown as the similar elements, the drawings do not constitute the proportional limitation, and wherein:

[0022] Figure 1 is a structural schematic diagram of an air conditioner provided by an embodiment of the present disclosure;

[0023] Figure 2 is a schematic diagram of a control method for an air conditioner provided by an embodiment of the present disclosure;

[0024] Figure 3 is a schematic diagram of another control method for an air conditioner provided by an embodiment of the present disclosure;

[0025] Figure 4 is a schematic diagram of another control method for an air conditioner provided by an embodiment of the present disclosure;

[0026] Figure 5 is a schematic diagram of a control device for an air conditioner provided by an embodiment of the present disclosure;

[0027] Figure 6 is a schematic diagram of an air conditioner product provided by an embodiment of the present disclosure.

[0028] Reference signs:

[0029] 1, air conditioner;

[0030] 10, air conditioner body;

[0031] 200, control device for air conditioner;

[0032] 20, circulating loop; 21, compressor; 22, outdoor heat exchanger; 23, throttling device; 24, indoor heat exchanger; 25, four-way valve. DETAILED DESCRIPTION

[0033] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the drawings, which are only used for reference and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, a plurality of details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be simplified to facilitate the drawings.

[0034] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0035] Unless otherwise specified, the term "a plurality of" means two or more.

[0036] The term "and / or" is a description of the association relationship of the object, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, the three relationships.

[0037] The term "corresponding" can refer to an association relationship or a binding relationship. A and B correspond to each other means that A and B have an association relationship or a binding relationship.

[0038] It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0039] As shown in Figure 1 The air conditioner 1 generally includes a circulation loop 20. The circulation loop 20 includes a compressor 21, an outdoor heat exchanger 22, a throttling device 23, an indoor heat exchanger 24, and a four-way valve 25. The throttling device 23 includes an electronic expansion valve (not shown in the figure). The air conditioner 1 also includes an electronic control device (not shown in the figure) for controlling the operation of the circulation loop 20, and the electronic control device includes a processor. The processor is used to control the compressor 21, adjust the electronic expansion valve, and other electronic control components, so as to realize various functions of the air conditioner 1.

[0040] In the embodiments of the present disclosure, the exhaust state of the compressor can be stably judged by the target adjustment parameter, so that the operation parameter of the air conditioner can be more reliably adjusted. Avoiding the fluctuation of the compressor exhaust temperature or the delay of the compressor exhaust temperature reflecting the exhaust state of the compressor, so as to accurately and stably determine the exhaust state of the compressor, thereby reducing the frequency of the compressor shutdown, and further improving the stability of the air conditioner operation.

[0041] In combinationFigure 1 The air conditioner, the embodiment of the present disclosure provides a control method for an air conditioner.

[0042] As Figure 2 shown, the method comprises:

[0043] S201, the processor obtains the exhaust temperature of the compressor of the air conditioner.

[0044] S202, the processor determines the target adjustment parameter of the air conditioner according to the exhaust temperature of the compressor.

[0045] S203, the processor adjusts the operating parameter of the air conditioner according to the target adjustment parameter.

[0046] In the above embodiment, the target adjustment parameter of the air conditioner is determined by the exhaust temperature of the compressor, and the exhaust state of the compressor is reflected by the target adjustment parameter, thereby improving the accuracy and stability of the judgment parameter. Therefore, according to the target adjustment parameter, the operating parameter of the air conditioner is adjusted, which can avoid the fluctuation of the exhaust temperature of the compressor or the delay of the exhaust temperature of the compressor to reflect the exhaust state of the compressor, so as to accurately and stably determine the exhaust state of the compressor, thereby reducing the frequency of the compressor shutdown, and further improving the stability of the air conditioner operation.

[0047] Optionally, the target adjustment parameter comprises the exhaust pressure and the exhaust temperature of the compressor.

[0048] In this embodiment, the exhaust temperature of the compressor fluctuates or delays to reflect the exhaust state of the compressor. Therefore, it is not accurate enough to judge the exhaust state of the compressor only by the exhaust temperature of the compressor, so the more sensitive exhaust pressure parameter of the compressor is introduced to jointly judge, thereby improving the accuracy and sensitivity of the judgment of the exhaust state of the compressor when the exhaust temperature of the compressor is high.

[0049] Optionally, the target adjustment parameter comprises the exhaust pressure and the exhaust temperature of the compressor, and the condenser temperature of the air conditioner.

[0050] In this embodiment, on the basis of the exhaust temperature of the compressor, the more sensitive exhaust pressure parameter of the compressor and the condenser temperature are introduced to jointly judge, thereby improving the accuracy and sensitivity of the judgment of the exhaust state of the compressor when the exhaust temperature of the compressor is low.

[0051] As Figure 3 shown, the embodiment of the present disclosure provides another control method for an air conditioner. The method comprises:

[0052] S301, the processor obtains the exhaust temperature of the compressor of the air conditioner.

[0053] S302, the processor determines that the target adjustment parameter of the air conditioner is the discharge pressure and the discharge temperature of the compressor when the discharge temperature is greater than or equal to the first preset temperature.

[0054] Optionally, the first preset temperature is set to [90 (degrees Celsius), 98]. More specifically, the first preset temperature is set to 90, 93, 95, or 98. Setting the first preset temperature to the above interval represents that the discharge temperature of the compressor is relatively high.

[0055] S303, the processor determines that the target adjustment parameter of the air conditioner is the discharge pressure and the discharge temperature of the compressor, and the condenser temperature of the air conditioner when the discharge temperature is less than the second preset temperature.

[0056] Optionally, the second preset temperature is set to [45, 55]. More specifically, the second preset temperature is set to 45, 50, or 55. Setting the second preset temperature to the above interval represents that the discharge temperature of the compressor is relatively low.

[0057] S304, the processor adjusts the operating parameter of the air conditioner according to the target adjustment parameter.

[0058] In the above embodiment, the discharge state of the compressor is determined by the discharge temperature of the compressor. When the discharge temperature is greater than or equal to the first preset temperature, it indicates that the discharge temperature of the compressor is relatively high. Then, the discharge pressure of the compressor is introduced as a judgment condition on the basis of the discharge temperature of the compressor. When the discharge temperature is less than the second preset temperature, it indicates that the discharge temperature of the compressor is relatively low. Then, the suction pressure of the compressor and the condenser temperature are introduced as two judgment conditions on the basis of the discharge temperature of the compressor. In this way, the judgment result can be more accurate and stable, so that the operating parameter of the air conditioner can be controlled more timely.

[0059] Optionally, the operating parameter of the air conditioner includes the opening degree of the electronic expansion valve of the air conditioner and / or the compressor frequency of the air conditioner. By controlling the opening degree of the electronic expansion valve of the air conditioner and / or the compressor frequency of the air conditioner, the discharge temperature of the compressor can be reduced or increased, so that the compressor is in a normal discharge state.

[0060] Optionally, when the target adjustment parameter is the discharge pressure and the discharge temperature of the compressor, the processor adjusts the operating parameter of the air conditioner according to the target adjustment parameter includes: when T d <T3, and P d ≤P2, the processor obtains the outdoor environment temperature. The processor adjusts the opening degree of the electronic expansion valve according to the outdoor environment temperature. And / or, when T d ≥T3, and P d >P2, the processor adjusts the compressor frequency.

[0061] wherein, Td T3 is a third preset temperature. Optionally, 100≤T3≤104. More specifically, T3 is set to 100, 102 or 104. d P is an exhaust pressure of the compressor. P1 is a first preset pressure. Optionally, 3Mpa (mega pascal)≤P1≤4Mpa. More specifically, P1 is set to 3Mpa, 3.5Mpa or 4Mpa. P2 is a second preset pressure. Optionally, 4MPa

[0062] In the above embodiment, in the case of T d <T3, and P1 d ≤P2, it indicates that the compressor is in an abnormal exhaust state. Since the outdoor ambient temperature represents the refrigeration load of the compressor, adjusting the electronic expansion valve opening degree according to the outdoor ambient temperature can reduce the resistance of the refrigerant in the air conditioner when circulating, make the refrigerant of the air conditioner circulate more smoothly, reduce the exhaust pressure of the compressor, and thus reduce the exhaust temperature of the compressor. In this way, the electronic expansion valve can restore the exhaust state of the compressor to normal, without the need to adjust the frequency of the compressor, thereby reducing the frequency of the compressor shutdown.

[0063] Optionally, the processor adjusting the electronic expansion valve opening degree according to the outdoor ambient temperature comprises: the processor calculating ΔA1=k×T ao , to obtain a first opening degree compensation value. The processor calculates A1=A0+ΔA1, to obtain a first target electronic expansion valve opening degree. The processor adjusts the electronic expansion valve opening degree to the first target electronic expansion valve opening degree.

[0064] ΔA1 is the first opening degree compensation value, k is a compensation coefficient, T ao is the outdoor ambient temperature, A1 is the first target electronic expansion valve opening degree, and A0 is the current electronic expansion valve opening degree.

[0065] Optionally, the processor obtains k in the following manner: the processor determines k according to the current electronic expansion valve opening degree. Wherein, k is inversely related to the current electronic expansion valve opening degree. That is, the greater the current electronic expansion valve opening degree, the smaller the k determined by the processor. The smaller the current electronic expansion valve opening degree, the greater the k determined by the processor. Optionally, 0.5≤k≤2. More specifically, k is set to 0.5, 1 or 2.

[0066] In the above embodiment, the outdoor ambient temperature represents the refrigeration load of the compressor, and the greater the outdoor ambient temperature, the greater the refrigeration load of the compressor, and the greater the adjusted electronic expansion valve opening degree, so as to accelerate the efficiency of reducing the refrigeration load of the compressor. In the case of the smaller outdoor ambient temperature, the smaller the refrigeration load of the compressor, and the smaller the adjusted electronic expansion valve opening degree, that is, the efficiency of reducing the refrigeration load of the compressor. Therefore, the electronic expansion valve opening degree adjustment value determined by the above algorithm can be adapted to the current exhaust state, so as to reduce the compressor exhaust pressure and thus reduce the compressor exhaust temperature.

[0067] Optionally, the processor adjusting the compressor frequency comprises: based on the current operating frequency of the compressor, the processor controls the compressor to be adjusted in frequency reduction at a first frequency compensation rate to a first operating frequency.

[0068] Optionally, the first frequency compensation rate is set to [2.5 Hz / s (hertz per second), 4.5 Hz / s]. More specifically, the first frequency compensation rate is set to 2.5 Hz / s, 3 Hz / s, 3.5 Hz / s, 4 Hz / s or 4.5 Hz / s.

[0069] In the above embodiment, by controlling the compressor to be adjusted in frequency reduction at a first frequency compensation rate, the efficiency of reducing the frequency of the compressor is accelerated to quickly improve the efficiency of the compressor exhaust temperature.

[0070] Optionally, the processor adjusting the compressor frequency further comprises: the processor calculates ΔF1=F0-F1 to obtain the cumulative frequency reduction value of the compressor. Wherein, ΔF1 is the cumulative frequency reduction value, F0 is the current operating frequency, and F1 is the first operating frequency. In the case that the cumulative frequency reduction value of the compressor is greater than or equal to the first frequency, the processor controls the compressor to operate at the first operating frequency for a first preset time length.

[0071] Optionally, the first frequency is set to [18 Hz, 24 Hz]. More specifically, the first frequency is set to 18 Hz, 20 Hz, 22 Hz or 24 Hz. Setting the first frequency to the above interval avoids the case that the frequency of the compressor is too low to cause poor working effect of the compressor. Thus, the working effect of the compressor is improved.

[0072] Optionally, the first preset time length is set to [4 min (minutes), 6 min]. More specifically, the first preset time length is set to 4 min, 5 min or 6 min. Setting the first preset time length to the above interval makes the exhaust state of the compressor tend to be stable within the time.

[0073] In the above embodiment, the cumulative frequency reduction value is determined by the first operating frequency and the current operating frequency. In the case that the cumulative frequency reduction value reaches the first frequency, the compressor is kept operating at the first operating frequency for a first preset time length, so as to ensure the working effect of the compressor.

[0074] Optionally, in the case that the target regulation parameter is the suction pressure and the discharge temperature of the compressor, and the condenser temperature of the air conditioner, the processor adjusts the operation parameter of the air conditioner according to the target regulation parameter, comprising: the processor calculates AT = T d -T c , to obtain the temperature difference between the discharge temperature of the compressor and the condenser temperature. In the case that P3≤P s <P4, T4≤AT < T5, and t r1 >t2, the electronic expansion valve opening degree is adjusted. In the case that P s <P3, and AT < T4, the compressor operation frequency is adjusted.

[0075] wherein, AT is the temperature difference, T d is the discharge temperature of the compressor, T c is the condenser temperature, P s is the suction pressure of the compressor. t r1 is the duration of the air conditioner in the state of P3≤P s <P4, T4≤AT < T5.

[0076] P3 is the third preset pressure. Optionally, 0.1 MPa < P3≤0.25 MPa. More specifically, P3 is set to 0.1 MPa, 0.15 MPa, 0.2 MPa, or 0.25 MPa. P4 is the fourth preset pressure. Optionally, 0.25 MPa < P4≤0.35 MPa. More specifically, P4 is set to 0.27 MPa, 0.3 MPa, or 0.35 MPa. T4 is the fourth preset temperature. Optionally, 14≤T4≤16. More specifically, T4 is set to 14, 15, or 16. T5 is the fifth preset temperature. Optionally, 17≤T5≤19. More specifically, T5 is set to 17, 18, or 19. t2 is the second preset duration. Optionally, 1 min≤t2≤3 min. More specifically, t2 is set to 1 min, 2 min, or 3 min.

[0077] In the above embodiments, in the case that P3≤P s <P4, T4≤AT < T5, and t r1 >t2, it indicates that the suction pressure and the discharge temperature of the compressor are relatively low, so the electronic expansion valve opening degree is adjusted, which can not only improve the suction pressure and the discharge temperature of the compressor, but also reduce the adjustment of the compressor frequency, to ensure the working effect of the compressor. In the case that P s <P3, and AT < T4, it indicates that the suction pressure and the discharge temperature of the compressor are too low, and only adjusting the electronic expansion valve opening degree cannot meet the requirement of restoring the discharge state of the compressor to normal, so the compressor frequency is adjusted to improve the suction pressure and the discharge temperature of the compressor.

[0078] Optionally, the adjusting, by the processor, the electronic expansion valve opening degree comprises: calculating, by the processor, A2=A0-△A2, to obtain a second target electronic expansion valve opening degree. The processor adjusts the electronic expansion valve opening degree to the second target electronic expansion valve opening degree.

[0079] wherein A2 is the second target electronic expansion valve opening degree, and△A2 is the second opening degree compensation value. Optionally, 80b≤△A2≤120b. More specifically,△A2 is set to 80b, 100b or 120b. In this way, the efficiency of the adjustment is faster through the directly determined second opening degree compensation value.

[0080] Optionally, the processor obtains△A2 in the following manner: calculating, by the processor,△A2=k×T ao , to obtain the second opening degree compensation value. In this way, the second target electronic expansion valve opening degree of the adjustment is more accurate.

[0081] Optionally, the adjusting, by the processor, the compressor operating frequency comprises: in the case that P s >P5,△T≥T6, and t r2 >t3, the processor controls the compressor to be adjusted to a second operating frequency at a second frequency compensation rate based on the current operating frequency of the compressor.

[0082] wherein t r2 is the duration of the air conditioner in the state that P s >P5 and△T≥T6.

[0083] P5 is a fifth preset pressure. Optionally, 0.05Mpa≤P5≤0.1Mpa. More specifically, P5 is set to 0.05Mpa, 0.07Mpa or 0.1Mpa. T6 is a sixth preset temperature. Optionally, 4≤T6≤6. More specifically, T6 is set to 4, 5 or 6. t3 is a third preset duration. Optionally, 1min≤t3≤5min. More specifically, t3 is set to 1min, 3min or 5min.

[0084] Optionally, the second frequency compensation rate is set to [0.2Hz / s, 0.5Hz / s]. More specifically, the second frequency compensation rate is set to 0.2Hz / s, 0.333Hz / s or 0.5Hz / s. It should be noted that the second frequency compensation rate should not be set too large or too small. If the second frequency compensation rate is set to be greater than 0.5Hz / s, the compressor is likely to be damaged. If the second frequency compensation rate is set to be less than 0.2Hz / s, it is difficult to quickly increase the compressor discharge temperature.

[0085] In the above embodiment, the compressor is adjusted to increase the frequency at the second frequency compensation rate, which ensures the operation of the compressor while increasing the compressor back pressure and thus increasing the compressor discharge temperature.

[0086] Optionally, the processor controls the compressor to perform the frequency up-regulation to the second operating frequency at the second frequency compensation rate further comprises: the processor calculates ΔF2=F2-F0 to obtain the cumulative frequency up value of the compressor. Wherein, ΔF2 is the cumulative frequency up value, F2 is the second operating frequency, and F0 is the current operating frequency. In the case that the cumulative frequency up value of the compressor is greater than or equal to the second frequency, the compressor is controlled to continuously operate at the second operating frequency.

[0087] Optionally, the second frequency is set to [16Hz, 22Hz]. More specifically, the second frequency is set to 16Hz, 18Hz, 20Hz or 22Hz.

[0088] In the above embodiment, the cumulative frequency up value is determined by the second operating frequency and the current operating frequency. In the case that the cumulative frequency up value reaches the second frequency, the compressor is continuously operated at the second operating frequency, thereby ensuring the working effect of the compressor.

[0089] Optionally, the processor adjusts the operating frequency of the compressor further comprises: in the case that P s ≤P5, ΔT r3 <T6, and t r3 > t4, the processor adjusts the compressor to operate at a third frequency.

[0090] Wherein, t r3 is the fourth preset time length. s ≤P5, ΔT d <T6.

[0091] t4 is the fourth preset time length. Optionally, 20min ≤ t4 ≤ 35min. More specifically, t4 is set to 20min, 30min or 35min.

[0092] Optionally, the third frequency is set to [0, 2Hz]. More specifically, the third frequency is set to 0.

[0093] In the above embodiment, the fourth preset time length is used to buffer the opportunity of the compressor, and the exhaust state of the compressor can be accurately determined. The state indicates that the exhaust of the compressor is too low, and the compressor is adjusted to the third frequency to avoid damage to the compressor and prolong the service life of the compressor.

[0094] As shown in FIG. Figure 4 The embodiment of the present disclosure provides another control method for an air conditioner. The method comprises:

[0095] S401, the processor obtains the exhaust temperature T d of the compressor of the air conditioner.

[0096] S402, the processor determines that the target adjustment parameter of the air conditioner is the exhaust pressure P d of the compressor in the case that T dand exhaust temperature T d .

[0097] S403, the processor obtains outdoor environment temperature T d <102, and 3.5Mpa d ≤4.3Mpa. ao .

[0098] S404, the processor calculates △A1=0.5×T ao , and obtains a first opening degree compensation value.

[0099] S405, the processor calculates A1=A0+0.5×T ao , and obtains a first target electronic expansion valve opening degree.

[0100] S406, the processor adjusts the electronic expansion valve opening degree to the first target electronic expansion valve opening degree.

[0101] S407, the processor obtains T d ≥102, and P d >4.3Mpa, controls the compressor to be adjusted to a first operating frequency at a frequency reduction of 3Hz / s based on the current operating frequency of the compressor.

[0102] S408, the processor calculates △F1=F0-F1, and obtains a cumulative frequency reduction value of the compressor.

[0103] S409, the processor controls the compressor to operate at the first operating frequency for 5min in the case that the cumulative frequency reduction value of the compressor is greater than or equal to 20Hz.

[0104] S410, the processor obtains T d <50, determines that the target adjustment parameter of the air conditioner is the return gas pressure P s of the compressor and the exhaust temperature T d , and the condenser temperature T c of the air conditioner.

[0105] S411, the processor calculates △T=T d -T c , and obtains a temperature difference △T of the exhaust temperature and the condenser temperature of the compressor.

[0106] S412, the processor adjusts the electronic expansion valve opening degree to decrease by 100b in the case that 0.2Mpa s <0.3Mpa, 15 r1 ≤△T<18, and t >1min.

[0107] S413, the processor adjusts the electronic expansion valve opening degree to decrease by 100b in the case that 0.1Mpa s <0.2Mpa, 18 <△T<20, and t >1min.<0.2Mpa, 5≤△T<15, and t r2 When the time is greater than 1 minute, based on the current operating frequency of the compressor, the compressor is controlled to increase the frequency to the second operating frequency at a second frequency compensation rate.

[0108] S414: The processor calculates ΔF2=F2-F0 to obtain the cumulative frequency increase value of the compressor.

[0109] S415: When the accumulated frequency increase value of the compressor is greater than or equal to 20 Hz, the processor controls the compressor to continuously operate at the second operating frequency.

[0110] S416, processor in P s ≤0.1Mpa, ΔT<5, and t r3 If the time is greater than 30 minutes, the compressor will be shut down.

[0111] In this embodiment, the implementation process of the method is explained as an example. Since the stability and accuracy of judging the exhaust state of the compressor only by the exhaust temperature of the compressor are low, determining the target adjustment parameter according to the exhaust temperature of the compressor can improve the stability and accuracy of the judgment result. In the case where the exhaust temperature of the compressor is high and the exhaust pressure is large, it is preferred to adjust the exhaust temperature and pressure of the compressor by adjusting the opening of the electronic expansion valve, and then adjust the compressor to reduce the frequency. In the case where the temperature difference between the exhaust temperature of the compressor and the condenser temperature is low and the return air pressure is low, it is preferred to adjust the opening of the electronic expansion valve, and then adjust the compressor to increase the frequency, and finally adjust the compressor to stop. In this way, the frequency of compressor shutdown can be reduced, the normal operation of the compressor can be ensured, and the service life of the compressor can be extended.

[0112] Combine Figure 5 , an embodiment of the present disclosure provides a control device 200 for an air conditioner, comprising a processor 500 and a memory 501. Optionally, the control device 200 for an air conditioner may further comprise a communication interface 502 and a bus 503. The processor 500, the communication interface 502, and the memory 501 may communicate with each other via the bus 503. The communication interface 502 may be used for information transmission. The processor 500 may call the logic instructions in the memory 501 to execute the control method for an air conditioner of the above embodiment.

[0113] In addition, the logic instructions in the memory 501 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0114] The memory 501 can be used to store software programs, computer executable programs, such as program instructions / modules corresponding to the method in the embodiments of the present disclosure. The processor 500 executes the function application and data processing by running the program instructions / modules stored in the memory 501, that is, implements the control method for the air conditioner in the above-mentioned embodiments.

[0115] The memory 501 can include a program storage area and a data storage area, wherein the program storage area can store an operating system and application programs required by at least one function; the data storage area can store data created according to the use of the terminal device, etc. In addition, the memory 501 can include a high-speed random access memory, and can also include a non-volatile memory.

[0116] In combination Figure 6 As shown in the figure, the embodiments of the present disclosure provide an air conditioner 1. The air conditioner 1 includes an air conditioner body 10, a compressor, an electronic expansion valve, and a control device for the air conditioner 200 as described above. The mounting relationship described herein is not limited to being placed inside the air conditioner 1, but also includes mounting connection with other components of the air conditioner 1, including but not limited to physical connection, electrical connection or signal transmission connection, etc. Those skilled in the art can understand that the control device for the air conditioner 200 can be adapted to the feasible air conditioner body 10, and thus realize other feasible embodiments. The compressor is arranged in the air conditioner body 10. The electronic expansion valve is arranged in the air conditioner body 10.

[0117] The embodiments of the present disclosure provide a computer readable storage medium, which stores computer executable instructions, and the computer executable instructions are configured to execute the control method for the air conditioner.

[0118] The computer readable storage medium described above can be a transitory computer readable storage medium or a non-transitory computer readable storage medium.

[0119] The technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium can be a non-transitory storage medium, including a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc. various media that can store program codes, or a transitory storage medium.

[0120] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include plural forms. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups of these. In the absence of further restrictions, an element defined by the sentence "comprising a..." does not exclude the presence of other identical elements in the process, method or device that includes the element. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments can be referenced to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can be found in the description of the method part.

[0121] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. The technicians will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0122] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to apparatuses, devices, etc.), can be implemented in other manners. For example, the described apparatus embodiments can be implemented only in a form of a logical function, and can be implemented by using a manner such as software (for example, a computer program) or a combination of hardware and software. In a component, a plurality of components, or a combination thereof, can be implemented. In some embodiments, a plurality of components or a combination thereof can be integrated in a machine to realize an apparatus according to the embodiments. In some embodiments, a plurality of components or a combination thereof can be integrated in an apparatus, so as to constitute a system.

[0123] The flowcharts and block diagrams in the drawings show the possible implementation architectures, functions and operations of the system, method and computer program product according to the embodiments of the present disclosure. In this regard, each block in the flowcharts or block diagrams can represent a module, a program segment or a part of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions noted in the blocks can occur in an order different from that noted in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the drawings, the operations or steps corresponding to different blocks can also occur in an order different from that disclosed in the descriptions, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. Each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A control method of an air conditioner, characterized by, Comprising: obtaining an exhaust temperature of a compressor of an air conditioner; in the case that the exhaust temperature is greater than or equal to a first preset temperature, determining a target adjustment parameter of the air conditioner as an exhaust pressure and the exhaust temperature of the compressor; in the case that the exhaust temperature is less than a second preset temperature, determining the target adjustment parameter of the air conditioner as a suction pressure and the exhaust temperature of the compressor, and a condenser temperature of the air conditioner; wherein the first preset temperature is greater than or equal to the second preset temperature; adjusting an operating parameter of the air conditioner according to the target adjustment parameter; When the target adjustment parameters are the exhaust pressure and exhaust temperature of the compressor, the operating parameters of the air conditioner are adjusted according to the target adjustment parameters, including: d <T3, and P1<P d ≤P2, obtain the outdoor ambient temperature; adjust the opening of the electronic expansion valve according to the outdoor ambient temperature; and / or, at T d ≥T3, and P d >P2, adjust the compressor frequency; where T d is the exhaust temperature of the compressor, T3 is the third preset temperature, P d is the exhaust pressure of the compressor, P1 is the first preset pressure, P2 is the second preset pressure, P1<P2; In the case that the target regulation parameter is the suction pressure and the discharge temperature of the compressor and the condenser temperature of the air conditioner, adjusting the operation parameter of the air conditioner according to the target regulation parameter comprises: calculating △T=T d -T c , obtaining the temperature difference between the discharge temperature of the compressor and the condenser temperature; wherein, △T is the temperature difference, T d is the discharge temperature of the compressor, T c is the condenser temperature; in the case that P3≤P s <P4, T4≤△T<T5, and t r1 >t2, adjusting the opening of the electronic expansion valve; in the case that P s <P3, and △T<T4, adjusting the operation frequency of the compressor; wherein, P s is the suction pressure of the compressor, P3 is the third preset pressure, P4 is the fourth preset pressure, T4 is the fourth preset temperature, T5 is the fifth preset temperature, t r1 is the duration of the air conditioner in the state of P3≤P s <P4, T4≤△T<T5, and t2 is the second preset duration.

2. The control method according to claim 1, characterized by, adjusting an electronic expansion valve opening degree according to an outdoor ambient temperature, comprising: Calculate ΔA1=k×T ao , to obtain a first opening degree compensation value; wherein, ΔA1 is the first opening degree compensation value, k is a compensation coefficient, T ao is an outdoor ambient temperature; calculating A1=A0+△A to obtain a first target electronic expansion valve opening degree; wherein A1 is the first target electronic expansion valve opening degree, and A0 is a current electronic expansion valve opening degree; adjusting the electronic expansion valve opening degree to the first target electronic expansion valve opening degree.

3. The control method according to claim 1, characterized by, adjusting a compressor frequency, comprising: based on a current operating frequency of the compressor, controlling the compressor to perform a frequency reduction adjustment to a first operating frequency at a first frequency compensation rate.

4. The control method according to claim 3, characterized by, adjusting the compressor frequency, further comprising: calculating△F1=F0-F1 to obtain a cumulative frequency reduction value of the compressor; wherein△F1 is the cumulative frequency reduction value, F0 is the current operating frequency, and F1 is the first operating frequency; in the case that the cumulative frequency reduction value of the compressor is greater than or equal to a first frequency, controlling the compressor to operate at the first operating frequency for a first preset time length.

5. The control method according to claim 1, characterized by, adjusting the compressor operating frequency, comprising: In P s > P5, ΔT ≥ T6, and t r2 > t3, based on the current operating frequency of the compressor, the compressor is controlled to ramp up to the second operating frequency at the second frequency compensation rate. Wherein, P5 is a fifth preset pressure, and P5 r2 For the air conditioner in P s T6, and T6 The third preset time length, t3. 6.A control apparatus for an air conditioner, comprising a processor and a memory storing program instructions, characterized in that, the processor is configured to execute the control method for the air conditioner as claimed in any one of claims 1 to 5 when running the program instructions.

7. An air conditioner characterized by comprising: Comprising: an air conditioner body; a compressor arranged in the air conditioner body; an electronic expansion valve arranged in the air conditioner body; and, the control device for the air conditioner as claimed in claim 6 is installed in the air conditioner body.

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