Air conditioner control method, device, air conditioner and storage medium

Abstract

The present invention provides an air conditioner control method, device, air conditioner and storage medium, including: obtaining the condenser inlet temperature and outdoor frost point temperature of an outdoor unit; performing temperature negative compensation on the exhaust temperature of an outdoor compressor according to the condenser inlet temperature and the outdoor frost point temperature, so as to determine the target exhaust temperature of the outdoor compressor; and regulating the electronic expansion valve in the outdoor unit according to the target exhaust temperature. The present invention performs temperature negative compensation on the exhaust temperature of the outdoor compressor in a targeted manner according to the different degrees of condenser frosting, determines the target exhaust temperature of the outdoor compressor, and regulates the electronic expansion valve in the outdoor unit according to the target exhaust temperature. Before starting the defrosting operation, the frequency of closing the electronic expansion valve can be reduced to ensure that the circulation amount of the refrigerant entering the room is sufficient, and the fluctuation of the indoor air outlet temperature can be reduced, which can effectively improve the indoor heating effect of the air conditioner and provide a good user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioner control method, device, air conditioner and storage medium. Background Art

[0002] With the improvement of residents' consumption level and the continuous development of air-conditioning technology, smart air conditioners have gradually entered every household and have been widely popularized.

[0003] In the existing use of smart air conditioners, when users use the air conditioner for heating in winter, due to the low outdoor temperature, frost will appear outdoors after a period of operation. The air conditioner will not start the defrosting operation until the frost reaches a certain thickness. Before the defrosting operation is started, the heat exchange capacity of the outdoor unit is reduced due to the frost, and the exhaust temperature of the outdoor compressor is also reduced. However, due to the constant exhaust temperature design of the compressor, the electronic expansion valve in the outdoor unit is frequently closed, which leads to a sharp decrease in the circulation amount of refrigerant entering the room, a sharp drop in the indoor air outlet temperature, and a poor indoor heating effect, which seriously affects the comfort experience of indoor users.

[0004] Therefore, how to better control the air conditioner before starting the defrost operation has become an urgent problem to be solved in the industry. Summary of the invention

[0005] The present invention provides an air conditioner control method, device, air conditioner and storage medium, which are used to better control the air conditioner before starting the defrosting operation.

[0006] The present invention provides an air conditioner control method, comprising:

[0007] Obtain the condenser inlet temperature and outdoor frost point temperature of the outdoor unit;

[0008] According to the condenser inlet temperature and the outdoor frost point temperature, negative temperature compensation is performed on the exhaust temperature of the outdoor compressor to determine the target exhaust temperature of the outdoor compressor;

[0009] The electronic expansion valve in the outdoor unit is regulated according to the target exhaust temperature.

[0010] According to an air conditioner control method provided by the present invention, negative temperature compensation is performed on the exhaust temperature of the outdoor compressor according to the condenser inlet temperature and the outdoor frost point temperature to determine the target exhaust temperature of the outdoor compressor, including:

[0011] determining a temperature difference between the condenser inlet temperature and the outdoor frost point temperature;

[0012] Determining a target temperature negative compensation value based on the temperature difference and a preset temperature difference threshold segmentation interval;

[0013] determining a target exhaust temperature of the outdoor compressor based on the target temperature negative compensation value;

[0014] The preset temperature difference threshold segment interval includes a plurality of temperature difference threshold intervals, and each of the temperature difference threshold intervals corresponds to a negative temperature compensation value.

[0015] According to an air conditioner control method provided by the present invention, before obtaining the condenser inlet temperature and the outdoor frost point temperature of the outdoor unit, the method further includes:

[0016] Acquire a first temperature collected by a defrost sensor in the outdoor unit and a second temperature collected by an external ambient temperature sensor in the outdoor unit;

[0017] Based on the first temperature, obtaining the condenser inlet temperature;

[0018] Based on the second temperature, the outdoor frost point temperature is determined.

[0019] According to an air conditioner control method provided by the present invention, based on the temperature difference and the preset temperature difference threshold segment interval, a target temperature negative compensation value is determined, comprising:

[0020] When the temperature difference is within a first temperature difference threshold interval, determining that the target temperature negative compensation value is zero;

[0021] or,

[0022] When the temperature difference is within a second temperature difference threshold interval, determining the target temperature negative compensation value to be a first threshold;

[0023] or,

[0024] When the temperature difference is within a third temperature difference threshold interval, determining the target temperature negative compensation value to be a second threshold;

[0025] or,

[0026] When the temperature difference is within a fourth temperature difference threshold interval, determining the target temperature negative compensation value to be a third threshold;

[0027] Wherein, the preset temperature difference threshold segment interval includes the first temperature difference threshold interval, the second temperature difference threshold interval, the third temperature difference threshold interval and the fourth temperature difference threshold interval;

[0028] The minimum threshold of the first temperature difference threshold interval is greater than the maximum threshold of the second temperature difference threshold interval, the minimum threshold of the second temperature difference threshold interval is greater than the maximum threshold of the third temperature difference threshold interval, and the minimum threshold of the third temperature difference threshold interval is greater than the maximum threshold of the fourth temperature difference threshold interval.

[0029] According to an air conditioner control method provided by the present invention, based on the target temperature negative compensation value, determining the target exhaust temperature of the outdoor compressor includes:

[0030] Determining a current exhaust temperature of the outdoor compressor; the current exhaust temperature of the outdoor compressor is determined based on a current operating frequency of the outdoor compressor and a current outdoor ambient temperature;

[0031] The target exhaust temperature of the outdoor compressor is obtained according to the target temperature negative compensation value and the current exhaust temperature of the outdoor compressor.

[0032] According to an air conditioner control method provided by the present invention, the lower limit value of the target exhaust temperature of the outdoor compressor is determined based on the outdoor ambient temperature.

[0033] The present invention also provides an air conditioner control device, comprising:

[0034] An acquisition model is used to acquire the condenser inlet temperature and the outdoor frost point temperature of the outdoor unit;

[0035] A processing module, used for performing negative temperature compensation on the exhaust temperature of the outdoor compressor according to the condenser inlet temperature and the outdoor frost point temperature, so as to determine the target exhaust temperature of the outdoor compressor;

[0036] The control module is used to control the electronic expansion valve in the outdoor unit according to the target exhaust temperature.

[0037] The present invention also provides an air conditioner, comprising a controller, wherein the controller comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, any of the air conditioner control methods described above is implemented.

[0038] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the air conditioner control method described in any one of the above is implemented.

[0039] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the air conditioner control method described above is implemented.

[0040] The present invention provides an air conditioner control method, device, air conditioner and storage medium. By obtaining the condenser inlet temperature and the outdoor frost point temperature of the outdoor unit, the frosting condition on the condenser is determined according to the condenser inlet temperature and the outdoor frost point temperature. Therefore, according to the different degrees of frosting on the condenser, negative temperature compensation is carried out on the exhaust temperature of the outdoor compressor in a targeted manner, and the target exhaust temperature of the outdoor compressor is determined. Therefore, according to the target exhaust temperature, the electronic expansion valve in the outdoor unit is regulated and controlled. Before starting the defrost operation, the frequency of closing the electronic expansion valve can be reduced to ensure that the circulation amount of refrigerant entering the room is sufficient, and the fluctuation of the indoor air outlet temperature is reduced. Therefore, the indoor heating effect of the air conditioner can be effectively improved, and the user experience is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 is a flow chart of the air conditioner control method provided by the present invention;

[0043] Figure 2 It is a structural schematic diagram of the air conditioner control device provided by the present invention;

[0044] Figure 3 It is a structural schematic diagram of a controller in an air conditioner provided by the present invention. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Combine the following Figure 1-Figure 3 An air conditioner control method, device, air conditioner and storage medium of the present invention are described.

[0047] Figure 1 FIG. 1 is a flow chart of the air conditioner control method provided by the present invention. Figure 1 As shown, including:

[0048] Step 110, obtaining the condenser inlet temperature and the outdoor frost point temperature of the outdoor unit;

[0049] Specifically, in the embodiment of the present invention, the condenser inlet temperature can be collected in real time through a defrost sensor provided in the outdoor unit.

[0050] It can be understood that the outdoor frost point temperature refers to the temperature when the outdoor air is cooled to saturation under the condition that the water vapor content and air pressure do not change.

[0051] Based on the content of the above embodiment, as an optional embodiment, before obtaining the condenser inlet temperature and the outdoor frost point temperature of the outdoor unit, the method further includes:

[0052] Acquire a first temperature collected by a defrost sensor in the outdoor unit and a second temperature collected by an external ambient temperature sensor in the outdoor unit;

[0053] Based on the first temperature, obtaining a condenser inlet temperature;

[0054] Based on the second temperature, an outdoor frost point temperature is determined.

[0055] Specifically, the first temperature described in the embodiment of the present invention refers to temperature information collected in real time by a defrost sensor in the outdoor unit.

[0056] The second temperature described in the embodiment of the present invention refers to temperature information collected in real time by the external ring temperature sensor in the outdoor unit, which is used to determine the outdoor environment temperature.

[0057] It can be understood that by acquiring the first temperature collected by the defrost sensor in the outdoor unit, the value of the first temperature is the condenser inlet temperature.

[0058] In an embodiment of the present invention, when the outdoor compressor is in operation, the condenser inlet temperature is obtained by detecting the first temperature Te collected by the defrost sensor; and the outdoor frost point temperature TL can be calculated by detecting the second temperature Tao collected by the outdoor external ring temperature sensor.

[0059] Among them, the calculation method of outdoor frost point temperature TL is divided into four cases, as follows:

[0060] In the first case, when Tao ≥ 6°C, the outdoor frost point temperature TL = -6°C;

[0061] In the second case, when -15℃≤Tao<6℃, the outdoor frost point temperature can be calculated by the formula TL=(5×Tao-72) / 7;

[0062] In the third case, when -23℃≤Tao<-15℃, the outdoor frost point temperature can be calculated by the formula TL=(Tao-69) / 4;

[0063] In the fourth case, when Tao<-23℃, the outdoor frost point temperature TL=-23℃.

[0064] It should be noted that the calculation of outdoor frost point temperature is divided into ordinary areas and areas prone to frost. In actual applications, the areas prone to frost can be set to 0 and the ordinary areas can be set to 1 for distinction.

[0065] In an embodiment of the present invention, the outdoor frost point temperature is determined in real time by acquiring the second temperature collected by the outer ring temperature sensor in the outdoor unit. The frosting condition of the outdoor unit can be effectively judged based on the condenser inlet temperature and the outdoor frost point temperature collected by the defrost sensor in the outdoor unit, providing strong data support for the subsequent calculation of the target exhaust temperature of the outdoor compressor.

[0066] Step 120 , performing negative temperature compensation on the exhaust temperature of the outdoor compressor according to the condenser inlet temperature and the outdoor frost point temperature, so as to determine the target exhaust temperature of the outdoor compressor.

[0067] Specifically, the target exhaust temperature described in the embodiment of the present invention refers to the exhaust temperature obtained after negative temperature compensation is performed on the current exhaust temperature of the outdoor compressor, which is used to dynamically control the electronic expansion valve of the outdoor unit.

[0068] After obtaining the condenser inlet temperature and outdoor frost point temperature of the outdoor unit, the frosting condition of the condenser surface can be accurately judged. For example, if the condenser inlet temperature of the outdoor unit is much higher than the outdoor frost point temperature, it means that there is no frost on the condenser surface or the frost is not serious; if the condenser inlet temperature of the outdoor unit is close to or lower than the outdoor frost point temperature, it means that the frost on the condenser surface is serious.

[0069] It should be noted that during the heating process of the air conditioner, if frost forms on the outdoor unit, the heat exchange capacity of the outdoor unit will be reduced, causing the exhaust temperature of the outdoor compressor to decrease accordingly. However, due to the existing design of a constant exhaust temperature of the outdoor compressor, in order to ensure a constant exhaust temperature of the outdoor compressor, the electronic expansion valve in the outdoor unit will frequently close during the entire process, ultimately resulting in poor indoor heating effect.

[0070] In an embodiment of the present invention, before starting the defrost operation, the frosting condition on the condenser surface is accurately judged based on the condenser inlet temperature of the outdoor unit and the outdoor frost point temperature, so that the exhaust temperature of the outdoor compressor is dynamically negatively compensated according to the different frosting conditions of the outdoor unit to determine the target exhaust temperature of the outdoor compressor, so as to change the existing design of the constant exhaust temperature of the outdoor compressor and dynamically reduce the exhaust temperature of the outdoor compressor.

[0071] Step 130: regulating the electronic expansion valve in the outdoor unit according to the target exhaust temperature.

[0072] In this step, after the target exhaust temperature of the outdoor compressor is obtained, the opening degree of the electronic expansion valve in the outdoor unit can be dynamically adjusted according to the target exhaust temperature.

[0073] When the exhaust temperature of the compressor is lowered through negative temperature compensation, the frequency of closing the electronic expansion valve can be effectively reduced, thereby ensuring sufficient refrigerant circulation into the room, thereby reducing fluctuations in the indoor air outlet temperature and avoiding discomfort to indoor users.

[0074] The air conditioner control method provided by the embodiment of the present invention obtains the condenser inlet temperature and the outdoor frost point temperature of the outdoor unit, and determines the frosting condition on the condenser according to the condenser inlet temperature and the outdoor frost point temperature, so as to carry out temperature negative compensation for the exhaust temperature of the outdoor compressor in a targeted manner according to the different degrees of frosting of the condenser, and determine the target exhaust temperature of the outdoor compressor, so as to regulate the electronic expansion valve in the outdoor unit according to the target exhaust temperature. Before starting the defrost operation, the frequency of closing the electronic expansion valve can be reduced to ensure that the circulation amount of refrigerant entering the room is sufficient, reduce the fluctuation of the indoor air outlet temperature, effectively improve the indoor heating effect of the air conditioner, and provide a good user experience.

[0075] Based on the content of the above embodiment, as an optional embodiment, negative temperature compensation is performed on the exhaust temperature of the outdoor compressor according to the condenser inlet temperature and the outdoor frost point temperature to determine the target exhaust temperature of the outdoor compressor, including:

[0076] determining a temperature difference between a condenser inlet temperature and said outdoor frost point temperature;

[0077] Determining a target temperature negative compensation value based on the temperature difference and a preset temperature difference threshold segmentation interval;

[0078] determining a target exhaust temperature of the outdoor compressor based on the target temperature negative compensation value;

[0079] The preset temperature difference threshold segment interval includes a plurality of temperature difference threshold intervals, and each of the temperature difference threshold intervals corresponds to a negative temperature compensation value.

[0080] Specifically, the temperature difference between the condenser inlet temperature and the outdoor frost point temperature described in the embodiment of the present invention refers to the temperature difference obtained by subtracting the outdoor frost point temperature from the condenser inlet temperature.

[0081] The preset temperature difference threshold segment interval described in the embodiment of the present invention refers to a pre-set segment control threshold interval, which may include a continuous multi-segment temperature difference threshold interval, each of which may correspond to a specific negative temperature compensation value to determine the target exhaust temperature of the outdoor compressor. The preset temperature difference threshold segment interval may be specifically set according to the configuration information and design requirements of the actual air conditioner, and the present invention does not specifically limit this.

[0082] The target temperature negative compensation value described in the embodiment of the present invention refers to a temperature negative compensation value determined corresponding to a preset temperature difference threshold segmentation interval according to the temperature difference between the condenser inlet temperature and the outdoor frost point temperature.

[0083] It can be understood that the preset temperature difference threshold segment interval can characterize the condition and degree of frosting on the surface of the condenser in the outdoor unit. Therefore, according to different degrees of frosting, the exhaust temperature of the outdoor compressor can be dynamically negatively compensated for.

[0084] Furthermore, after determining the temperature difference between the condenser inlet temperature and the outdoor frost point temperature, based on the temperature difference and the preset temperature difference threshold segmentation interval, the threshold interval to which the temperature difference belongs can be found from multiple temperature difference threshold intervals, so that the target temperature negative compensation value can be determined accordingly according to the threshold interval to which the temperature difference belongs.

[0085] Furthermore, after the target temperature negative compensation value is determined, the exhaust temperature of the current outdoor compressor can be obtained, and the exhaust temperature is negatively compensated and numerically corrected to obtain the target exhaust temperature of the outdoor compressor.

[0086] The method of the embodiment of the present invention determines the frosting situation of the outdoor unit by considering the temperature difference between the condenser inlet temperature and the outdoor frost point temperature, characterizes the different frosting degrees of the outdoor unit based on the preset temperature difference threshold segmentation interval, and performs negative compensation on the compressor exhaust temperature in a targeted manner, thereby realizing dynamic adjustment and fine control of the electronic expansion valve, ensuring that the frequency of closing the electronic expansion valve is reduced before starting the defrost operation, thereby improving the indoor heating effect.

[0087] Based on the content of the above embodiment, as an optional embodiment, determining the target temperature negative compensation value based on the temperature difference and the preset temperature difference threshold segment interval includes:

[0088] When the temperature difference is within the first temperature difference threshold interval, determining the target temperature negative compensation value to be zero;

[0089] or,

[0090] When the temperature difference is within the second temperature difference threshold interval, determining the target temperature negative compensation value to be the first threshold;

[0091] or,

[0092] When the temperature difference is within the third temperature difference threshold interval, determining the target temperature negative compensation value to be the second threshold;

[0093] or,

[0094] When the temperature difference is within a fourth temperature difference threshold interval, determining the target temperature negative compensation value to be a third threshold;

[0095] The preset temperature difference threshold segment intervals include a first temperature difference threshold interval, a second temperature difference threshold interval, a third temperature difference threshold interval and a fourth temperature difference threshold interval;

[0096] The minimum threshold of the first temperature difference threshold interval is greater than the maximum threshold of the second temperature difference threshold interval, the minimum threshold of the second temperature difference threshold interval is greater than the maximum threshold of the third temperature difference threshold interval, and the minimum threshold of the third temperature difference threshold interval is greater than the maximum threshold of the fourth temperature difference threshold interval.

[0097] Specifically, the first temperature difference threshold interval described in the embodiment of the present invention refers to the threshold interval that represents the maximum temperature difference between the condenser inlet temperature and the outdoor frost point temperature in the preset temperature difference threshold segmentation interval. Assuming that the temperature difference between the condenser inlet temperature and the outdoor frost point temperature is expressed as △t, the first temperature difference threshold interval can be set to a threshold interval greater than the target threshold, such as the target threshold can be 5℃, 6℃, 7℃, etc., such as the first temperature difference threshold interval can be set to △t>5℃.

[0098] The second temperature difference threshold interval described in the embodiment of the present invention refers to a threshold interval in the preset temperature difference threshold segmentation interval that represents a larger temperature difference between the condenser inlet temperature and the outdoor frost point temperature. For example, when the target threshold is 5°C, the second temperature difference threshold interval can be set to 3°C<△t≤5°C; when the target threshold is 6°C, the second temperature difference threshold interval can be set to 4°C<△t≤6°C.

[0099] The third temperature difference threshold interval described in the embodiment of the present invention refers to a threshold interval in the preset temperature difference threshold segmentation interval that represents a smaller temperature difference between the condenser inlet temperature and the outdoor frost point temperature. If the second temperature difference threshold interval is set to 3℃<△t≤5℃, the third temperature difference threshold interval can be set to 1℃<△t≤3℃; if the second temperature difference threshold interval is set to 4℃<△t≤6℃, the third temperature difference threshold interval can be set to 2℃<△t≤4℃.

[0100] The fourth temperature difference threshold interval described in the embodiment of the present invention refers to the threshold interval in the preset temperature difference threshold segmentation interval that characterizes the minimum temperature difference between the condenser inlet temperature and the outdoor frost point temperature. If the third temperature difference threshold interval is set to 1°C<△t≤3°C, the fourth temperature difference threshold interval can be set to △t<1°C; if the third temperature difference threshold interval is set to 2°C<△t≤4°C, the fourth temperature difference threshold interval can be set to △t<2°C.

[0101] The first threshold value described in the embodiment of the present invention refers to the negative temperature compensation value when the temperature difference between the condenser inlet temperature and the outdoor frost point temperature is large, that is, the negative temperature compensation value corresponding to the second temperature difference threshold interval, which can be specifically -8°C, -9°C, -10°C, etc.

[0102] The second threshold value described in the embodiment of the present invention refers to the negative temperature compensation value when the temperature difference between the condenser inlet temperature and the outdoor frost point temperature is small, that is, the negative temperature compensation value corresponding to the third temperature difference threshold interval, which can be specifically -15°C, -16°C, -17°C, etc.

[0103] The third threshold value described in the embodiment of the present invention refers to the negative temperature compensation value when the temperature difference between the condenser inlet temperature and the outdoor frost point temperature is the smallest, or even negative, that is, the negative temperature compensation value corresponding to the fourth temperature difference threshold interval, and its specific values ​​can be -23°C, -24°C, -25°C, etc.

[0104] In an embodiment of the present invention, the preset temperature difference threshold segment interval may include a plurality of continuous temperature difference threshold intervals, which may include four threshold intervals: a first temperature difference threshold interval, a second temperature difference threshold interval, a third temperature difference threshold interval, and a fourth temperature difference threshold interval;

[0105] Among them, the minimum threshold of the first temperature difference threshold interval is greater than the maximum threshold of the second temperature difference threshold interval, the minimum threshold of the second temperature difference threshold interval is greater than the maximum threshold of the third temperature difference threshold interval, and the minimum threshold of the third temperature difference threshold interval is greater than the maximum threshold of the fourth temperature difference threshold interval. That is to say, the first temperature difference threshold interval, the second temperature difference threshold interval, the third temperature difference threshold interval and the fourth temperature difference threshold interval are four consecutive threshold intervals on the threshold.

[0106] In this embodiment, when the temperature difference between the condenser inlet temperature and the outdoor frost point temperature is in the first temperature difference threshold interval in the preset temperature difference threshold segmentation interval, such as △t>5°C, the target temperature negative compensation value is determined to be zero. That is, when the temperature difference between the condenser inlet temperature and the outdoor frost point temperature is the largest, that is, when the condenser inlet temperature is much larger than the outdoor frost point temperature, it means that the outdoor unit has not yet frosted and will not affect the indoor heating effect. Therefore, the target temperature negative compensation value is zero, that is, the current exhaust temperature of the compressor is kept unchanged.

[0107] In an embodiment of the present invention, when the temperature difference between the condenser inlet temperature and the outdoor frost point temperature is in the second temperature difference threshold interval in the preset temperature difference threshold segmentation interval, such as 3°C<△t≤5°C, the target temperature negative compensation value is determined to be the first threshold. That is to say, at this time, the temperature difference between the condenser inlet temperature and the outdoor frost point temperature is large, which may indicate that frost begins to form on the outdoor unit and begins to affect the indoor heating effect, and the exhaust temperature of the current compressor needs to be lowered. At this time, the target temperature negative compensation value for negatively compensating the compressor exhaust temperature can be set to the first threshold, such as -8°C, that is, by adjusting the opening of the electronic expansion valve, the exhaust temperature of the current compressor is reduced by 8°C.

[0108] In an embodiment of the present invention, when the temperature difference between the condenser inlet temperature and the outdoor frost point temperature is in the third temperature difference threshold interval in the preset temperature difference threshold segmentation interval, such as 1°C<△t≤3°C, the target temperature negative compensation value is determined to be the second threshold value. That is to say, at this time, the temperature difference between the condenser inlet temperature and the outdoor frost point temperature is small, which may indicate that the frost on the outdoor unit has reached a certain thickness and the exhaust temperature of the current compressor needs to be greatly reduced. At this time, the target temperature negative compensation value for negatively compensating the compressor exhaust temperature can be set to the second threshold value, such as -15°C, that is, by adjusting the opening of the electronic expansion valve, the exhaust temperature of the current compressor is reduced by 15°C.

[0109] In this embodiment, when the temperature difference between the condenser inlet temperature and the outdoor frost point temperature is in the fourth temperature difference threshold interval in the preset temperature difference threshold segmentation interval, such as △t<1°C, the target temperature negative compensation value is determined to be the third threshold value. That is to say, at this time, the temperature difference between the condenser inlet temperature and the outdoor frost point temperature is the smallest, or even a negative value, indicating that the thickness of frost on the outdoor unit is large and the exhaust temperature of the compressor needs to be reduced to the greatest extent. At this time, the target temperature negative compensation value for negative compensation of the compressor exhaust temperature can be set to the third threshold value, such as -23°C, that is, by adjusting the opening of the electronic expansion valve, the exhaust temperature of the current compressor is reduced by 23°C.

[0110] The method of the embodiment of the present invention, by presetting the temperature difference threshold segmentation interval, determines the different degrees of frosting of the outdoor unit according to the temperature difference between the condenser inlet temperature and the outdoor frost point temperature, and can adaptively determine the target temperature negative compensation value for negatively compensating the compressor exhaust temperature under different degrees of frosting, thereby improving the refinement and intelligence of the exhaust temperature control of the air conditioner compressor.

[0111] Based on the content of the above embodiment, as an optional embodiment, determining the target exhaust temperature of the outdoor compressor based on the target temperature negative compensation value includes:

[0112] Determine a current exhaust temperature of the outdoor compressor; the current exhaust temperature of the outdoor compressor is determined based on a current operating frequency of the outdoor compressor and a current outdoor ambient temperature;

[0113] The target exhaust temperature of the outdoor compressor is obtained according to the target temperature negative compensation value and the current exhaust temperature of the outdoor compressor.

[0114] Specifically, in an embodiment of the present invention, the exhaust temperature of the outdoor compressor is determined based on the following calculation formula, namely:

[0115] DisT = a*f+b+c;

[0116] Among them, the exhaust temperature of the outdoor compressor is INT (DisT).

[0117] In the formula, DisT and a are both decimals, DisT represents the exhaust temperature of the outdoor compressor, a represents the preset coefficient, and its value range can be 0.01 to 2.00; f represents the operating frequency of the outdoor compressor; b is a preset constant, which is an integer, and its value range can be -50 to 200; c represents the compensation value of the outer loop for the compressor exhaust temperature, which is specifically determined according to the outdoor ambient temperature.

[0118] Here, INT represents a rounding operation, and the processing examples are as follows: INT(1.98)=1, INT(1.02)=1, INT(0.98)=0, INT(-0.01)=-1, INT(-3.98)=-4, that is, the INT operator rounds to a smaller value.

[0119] It can be seen that the control of the exhaust temperature of the compressor is only related to its operating frequency f and the corresponding c value. When the compressor is heating at the same operating frequency, the exhaust temperature of the compressor is constant during the entire heating process.

[0120] Further, in an embodiment of the present invention, the current outdoor ambient temperature is obtained, and the compensation value c of the outer loop for the compressor exhaust temperature can be determined; and then according to the current operating frequency f of the outdoor compressor, the compensation value c of the outer loop for the compressor exhaust temperature, the preset coefficient a and the preset constant b, the current exhaust temperature of the outdoor compressor can be calculated;

[0121] In this embodiment, based on the temperature difference between the condenser inlet temperature and the outdoor frost point temperature, the target temperature negative compensation value d is determined. By introducing the target temperature negative compensation value d, the current exhaust temperature of the compressor can be negatively compensated. Then, the calculation formula DisT of the exhaust temperature of the outdoor compressor can be changed to DisT', that is:

[0122] DisT' = DisT + d = a*f + b + c + d;

[0123] Furthermore, based on the target temperature negative compensation value and the current exhaust temperature of the outdoor compressor, the target temperature negative compensation value d and the current exhaust temperature of the outdoor compressor are summed to obtain the target exhaust temperature of the outdoor compressor, thereby achieving negative temperature compensation for the exhaust temperature of the outdoor compressor.

[0124] The method of the embodiment of the present invention introduces a target temperature negative compensation value to perform temperature negative compensation on the compressor exhaust temperature in the existing control logic, and the implementation logic is relatively simple and highly practical.

[0125] Based on the content of the above embodiment, as an optional embodiment, the lower limit value of the target exhaust temperature of the outdoor compressor is determined based on the outdoor ambient temperature.

[0126] Specifically, in an embodiment of the present invention, the lower limit value of the target exhaust temperature of the outdoor compressor is determined based on the outdoor ambient temperature. That is, after negative temperature compensation is performed on the exhaust temperature of the compressor to obtain the target exhaust temperature, the target exhaust temperature of the compressor must be finally determined based on the current outdoor ambient temperature.

[0127] In a specific embodiment, when the outdoor ambient temperature is above 0°C, the target exhaust temperature can be as low as 65°C, that is, the lower limit of the target exhaust temperature can be 65°C; when the outdoor ambient temperature is between -10°C and 0°C, the lower limit of the target exhaust temperature can be 55 degrees; when the outdoor ambient temperature is lower than -10°C, the lower limit of the target exhaust temperature can be 50 degrees.

[0128] The method of the embodiment of the present invention can effectively prevent the degree of frosting of the outdoor unit from being aggravated due to the excessive temperature difference between the outdoor ambient temperature and the target exhaust temperature by setting the lower limit of the target exhaust temperature according to the outdoor ambient temperature, which is conducive to the efficient operation of subsequent defrosting operations.

[0129] The air conditioner control device provided by the present invention is described below. The air conditioner control device described below and the air conditioner control method described above can be referred to each other.

[0130] Figure 2 Schematic diagram of the structure of the air conditioner control device provided by the present invention. Figure 2 As shown, including:

[0131] An acquisition model 210 is used to acquire the condenser inlet temperature and the outdoor frost point temperature of the outdoor unit;

[0132] A processing module 220, for performing negative temperature compensation on the exhaust temperature of the outdoor compressor according to the condenser inlet temperature and the outdoor frost point temperature, so as to determine a target exhaust temperature of the outdoor compressor;

[0133] The control module 230 is used to control the electronic expansion valve in the outdoor unit according to the target exhaust temperature.

[0134] The air conditioner control device described in this embodiment can be used to execute the above-mentioned air conditioner control method embodiment, and its principles and technical effects are similar, which will not be repeated here.

[0135] The air conditioner control device provided by the present invention obtains the condenser inlet temperature and the outdoor frost point temperature of the outdoor unit, and determines the frosting condition on the condenser according to the condenser inlet temperature and the outdoor frost point temperature, so as to carry out temperature negative compensation for the exhaust temperature of the outdoor compressor in a targeted manner according to the different degrees of frosting of the condenser, and determine the target exhaust temperature of the outdoor compressor, so as to regulate the electronic expansion valve in the outdoor unit according to the target exhaust temperature. Before starting the defrost operation, the frequency of closing the electronic expansion valve can be reduced to ensure that the circulation amount of refrigerant entering the room is sufficient, reduce the fluctuation of the indoor air outlet temperature, effectively improve the indoor heating effect of the air conditioner, and provide a good user experience.

[0136] Figure 3 FIG. 1 is a schematic diagram of the structure of the controller in the air conditioner provided by the present invention. Figure 3 As shown, the present invention also provides an air conditioner, including a controller; the controller may include: a processor 310, a communication interface 320, a memory 330 and a communication bus 340, wherein the processor 310, the communication interface 320 and the memory 330 communicate with each other through the communication bus 340. The processor 310 may call the logic instructions in the memory 330 to execute the air conditioner control method provided by the above methods, the method comprising: obtaining the condenser inlet temperature and the outdoor frost point temperature of the outdoor unit; performing temperature negative compensation on the exhaust temperature of the outdoor compressor according to the condenser inlet temperature and the outdoor frost point temperature, so as to determine the target exhaust temperature of the outdoor compressor; and regulating the electronic expansion valve in the outdoor unit according to the target exhaust temperature.

[0137] In addition, the logic instructions in the above-mentioned memory 330 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0138] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the air conditioner control method provided by the above-mentioned methods, which includes: obtaining the condenser inlet temperature and the outdoor frost point temperature of the outdoor unit; performing negative temperature compensation on the exhaust temperature of the outdoor compressor according to the condenser inlet temperature and the outdoor frost point temperature, so as to determine the target exhaust temperature of the outdoor compressor; and regulating the electronic expansion valve in the outdoor unit according to the target exhaust temperature.

[0139] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the air conditioner control method provided by the above-mentioned methods, the method comprising: obtaining the condenser inlet temperature and the outdoor frost point temperature of the outdoor unit; performing negative temperature compensation on the exhaust temperature of the outdoor compressor according to the condenser inlet temperature and the outdoor frost point temperature, so as to determine the target exhaust temperature of the outdoor compressor; and regulating the electronic expansion valve in the outdoor unit according to the target exhaust temperature.

[0140] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0141] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air conditioner control method, characterized in that: include: Obtain the condenser inlet temperature and outdoor frost point temperature of the outdoor unit; determining a temperature difference between the condenser inlet temperature and the outdoor frost point temperature; Determining a target temperature negative compensation value based on the temperature difference and a preset temperature difference threshold segmentation interval; determining a target exhaust temperature of the outdoor compressor based on the target temperature negative compensation value; The preset temperature difference threshold segmentation interval includes a plurality of temperature difference threshold intervals, and each of the temperature difference threshold intervals corresponds to a negative temperature compensation value; The electronic expansion valve in the outdoor unit is regulated according to the target exhaust temperature.

2. The air conditioner control method according to claim 1, characterized in that: Before obtaining the condenser inlet temperature and outdoor frost point temperature of the outdoor unit, it also includes: Acquire a first temperature collected by a defrost sensor in the outdoor unit and a second temperature collected by an external ambient temperature sensor in the outdoor unit; Based on the first temperature, obtaining the condenser inlet temperature; Based on the second temperature, the outdoor frost point temperature is determined.

3. The air conditioner control method according to claim 1, characterized in that: Based on the temperature difference and the preset temperature difference threshold segment interval, determining the target temperature negative compensation value includes: When the temperature difference is within a first temperature difference threshold interval, determining that the target temperature negative compensation value is zero; or, When the temperature difference is within a second temperature difference threshold interval, determining the target temperature negative compensation value to be a first threshold; or, When the temperature difference is within a third temperature difference threshold interval, determining the target temperature negative compensation value to be a second threshold; or, When the temperature difference is within a fourth temperature difference threshold interval, determining the target temperature negative compensation value to be a third threshold; Wherein, the preset temperature difference threshold segment interval includes the first temperature difference threshold interval, the second temperature difference threshold interval, the third temperature difference threshold interval and the fourth temperature difference threshold interval; The minimum threshold of the first temperature difference threshold interval is greater than the maximum threshold of the second temperature difference threshold interval, the minimum threshold of the second temperature difference threshold interval is greater than the maximum threshold of the third temperature difference threshold interval, and the minimum threshold of the third temperature difference threshold interval is greater than the maximum threshold of the fourth temperature difference threshold interval.

4. The air conditioner control method according to claim 1, characterized in that: Determining a target exhaust temperature of the outdoor compressor based on the target temperature negative compensation value includes: Determining a current exhaust temperature of the outdoor compressor; the current exhaust temperature of the outdoor compressor is determined based on a current operating frequency of the outdoor compressor and a current outdoor ambient temperature; The target exhaust temperature of the outdoor compressor is obtained according to the target temperature negative compensation value and the current exhaust temperature of the outdoor compressor.

5. The air conditioner control method according to any one of claims 1 to 4, characterized in that: The lower limit value of the target exhaust temperature of the outdoor compressor is determined based on the outdoor ambient temperature.

6. An air conditioner control device, characterized in that: include: An acquisition model is used to acquire the condenser inlet temperature and the outdoor frost point temperature of the outdoor unit; A processing module, used for performing negative temperature compensation on the exhaust temperature of the outdoor compressor according to the condenser inlet temperature and the outdoor frost point temperature, so as to determine the target exhaust temperature of the outdoor compressor; The control module is used to control the electronic expansion valve in the outdoor unit according to the target exhaust temperature.

7. An air conditioner, comprising a controller, the controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the air conditioner control method according to any one of claims 1 to 5 is implemented.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the air conditioner control method according to any one of claims 1 to 5 is implemented.

9. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the air conditioner control method according to any one of claims 1 to 5 is implemented.

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