Compressor operation control method and device and air conditioner

Abstract

The invention discloses a compressor operation control method and device and an air conditioner. The method comprises the steps that the standard return air temperature is calculated according to the evaporator tube temperature and the outdoor environment temperature; wherein the corresponding relation among the standard return air temperature, the evaporator tube temperature and the outdoor environment temperature is pre-stored; a first difference value between the return air temperature detection value and the standard return air temperature is calculated, and a second difference value between the return air temperature detection value and the set temperature is calculated; and the compressor is controlled to be started or stopped according to the first difference value and the second difference value. By means of the air conditioner control method and device, the problem that air conditioner control is abnormal due to inaccurate return air temperature detection can be avoided, the air conditioner control accuracy is improved, and then the user experience is improved.

Description

Technical Field

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

[0002] All heat exchange components of some existing air conditioners (rooftop air conditioners) are installed outdoors. The return air is absorbed through the return air duct, and the treated air is sent out through the supply air duct to achieve indoor air conditioning. During the operation of the air conditioner, the operation of the compressor needs to be controlled according to the indoor return air temperature. However, since the temperature sensor for detecting the indoor return air temperature is generally placed in a fixed position, it can only reflect the temperature at the placement point. Since the air duct is generally long, it is difficult to avoid air leakage and heat leakage during the air circulation process, resulting in inaccurate detection of the indoor return air temperature. The indoor return air temperature is the control target of the air conditioner. If the detection is inaccurate, it will cause abnormal control of the air conditioner and affect the comfort of the air conditioner.

[0003] With regard to the problem in the prior art that the return air duct of the air conditioner is too long, resulting in inaccurate return air temperature detection and abnormal air conditioner control, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present invention provide a compressor operation control method, device and air conditioner to solve the problem in the prior art that the return air duct is too long, resulting in inaccurate return air temperature detection and abnormal air conditioner control.

[0005] In order to solve the above technical problems, the present invention provides a compressor operation control method, which is applied to an air conditioner, wherein the air conditioner includes a compressor, a condenser, a throttling component and an evaporator. The compressor operation control method includes:

[0006] The standard return air temperature is calculated according to the evaporator tube temperature and the outdoor ambient temperature; wherein the corresponding relationship between the standard return air temperature, the evaporator tube temperature and the outdoor ambient temperature is pre-stored;

[0007] Calculating a first difference between the return air temperature detection value and the standard return air temperature, and calculating a second difference between the return air temperature detection value and the set temperature;

[0008] The compressor is controlled to start or stop according to the first difference and the second difference.

[0009] Furthermore, the correspondence between the standard return air temperature, the evaporator tube temperature, and the outdoor ambient temperature is pre-stored, including:

[0010] Test the return air temperature at the same outdoor temperature and different evaporator tube temperatures, and the return air temperature at the end of the return air duct at the same evaporator tube temperature and different outdoor temperatures.

[0011] The functional relationship between the return air temperature, the outdoor temperature, and the evaporator tube temperature is fitted to obtain the corresponding relationship between the standard return air temperature, the evaporator tube temperature, and the outdoor ambient temperature.

[0012] Furthermore, the corresponding relationship between the standard return air temperature, the evaporator tube temperature, and the outdoor ambient temperature is:

[0013]

[0014] Among them, T1 is the standard return air temperature, T3 is the evaporator tube temperature, T2 is the outdoor ambient temperature, a is the first fitting coefficient, b is the fitting coefficient, and c is the third fitting coefficient.

[0015] Further, controlling the compressor to start or stop according to the first difference and the second difference includes:

[0016] Determine an interval in which the first difference value is located and an interval in which the second difference value is located;

[0017] The compressor is controlled to start or stop according to the interval in which the first difference value is located and the interval in which the second difference value is located.

[0018] Further, controlling the compressor to start or stop according to the interval in which the first difference value is located and the interval in which the second difference value is located includes:

[0019] If the first difference is less than a lower limit of a first preset interval, controlling the compressor to start;

[0020] If the first difference is greater than the upper limit of the first preset interval, controlling the compressor to stop;

[0021] If the first difference is greater than and is within the first preset interval, the compressor is controlled to start or stop according to the interval in which the second difference is located.

[0022] Further, controlling the compressor to start or stop according to the interval in which the second difference is located includes:

[0023] If the second difference is less than a lower limit of a second preset interval, controlling the compressor to stop;

[0024] If the second difference is within the second preset interval, or is greater than an upper limit of the second preset interval, the compressor is controlled to start.

[0025] Further, after controlling the compressor to stop, the method further includes:

[0026] Continue to control the compressor to start or stop according to the interval in which the first difference value is located and the interval in which the second difference value is located.

[0027] Further, controlling the compressor to start or stop according to the interval in which the first difference value is located and the interval in which the second difference value is located includes:

[0028] If the first difference is less than a lower limit of a first preset interval, controlling the compressor to start;

[0029] If the first difference is greater than the upper limit of the first preset interval, controlling the compressor to stop;

[0030] If the first difference is greater than and is within the first preset interval, the compressor is controlled to start or stop according to the interval in which the second difference is located.

[0031] Further, controlling the compressor to start or stop according to the interval in which the second difference is located includes:

[0032] If the second difference is less than a lower limit of a second preset interval, or is within the second preset interval, controlling the compressor to stop;

[0033] If the second difference is greater than the upper limit of the second preset interval, the compressor is controlled to be turned on.

[0034] The present invention also provides a compressor operation control device, the device comprising:

[0035] The first calculation module is used to calculate the standard return air temperature according to the evaporator tube temperature and the outdoor ambient temperature; wherein the correspondence between the standard return air temperature, the evaporator tube temperature and the outdoor ambient temperature is pre-stored;

[0036] A second operation module is used to calculate a first difference between the return air temperature detection value and the standard return air temperature; and calculate a second difference between the return air temperature detection value and the set temperature;

[0037] A control module is used to control the compressor to start or stop according to the first difference and the second difference.

[0038] The present invention also provides an air conditioner, comprising a compressor, a condenser, a throttling component and an evaporator, and also comprising the above compressor operation control device.

[0039] The present invention also provides a computer-readable storage medium having a computer program stored thereon, and the program implements the above-mentioned compressor operation method when executed by a processor.

[0040] The present invention also provides an electronic device, comprising:

[0041] one or more processors;

[0042] A storage device is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned compressor operation method.

[0043] By applying the technical solution of the present invention, the standard return air temperature is calculated according to the evaporator tube temperature and the outdoor ambient temperature, based on the correspondence between the standard return air temperature, the evaporator tube temperature and the outdoor ambient temperature, and then the first difference between the return air temperature detection value and the standard return air temperature, and the second difference between the return air temperature detection value and the set temperature are calculated respectively. Whether the return air temperature is accurate is determined by calculating the first difference between the return air temperature and the standard return air temperature, and whether the compressor shutdown condition is met is determined by the second difference between the return air temperature detection value and the set temperature. The compressor is controlled to start or stop according to the above-mentioned first difference and the above-mentioned second difference, which can avoid the problem of inaccurate return air temperature detection and abnormal air conditioner control, improve the accuracy of air conditioner control, and thus improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural diagram of an existing air conditioner; wherein, 1-compressor, 2-condenser, 3-throttling component, 4-evaporator, 5-inner fan, 6-outer fan, 7-return air temperature sensor, 8-evaporator pipe temperature sensor, 9-outdoor ambient temperature sensor;

[0045] Figure 2 is a flow chart of a compressor operation control method according to an embodiment of the present invention;

[0046] Figure 3 is a corresponding relationship diagram between the evaporator tube temperature and the indoor return air temperature at the same outdoor ambient temperature according to an embodiment of the present invention;

[0047] Figure 4 is a structural block diagram of a compressor operation control device according to an embodiment of the present invention;

[0048] Figure 5 FIG. 4 is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all 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.

[0050] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0051] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0052] It should be understood that, although the terms first, second, etc. may be used to describe the operation modules in the embodiments of the present invention, these operation modules should not be limited to these terms. These terms are only used to distinguish different operation modules. For example, without departing from the scope of the embodiments of the present invention, the first operation module may also be referred to as the second operation module, and similarly, the second operation module may also be referred to as the first operation module.

[0053] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0054] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0055] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0056] Example 1

[0057] During the operation of the air conditioner, it is necessary to control the operation of the compressor according to the indoor return air temperature. However, since the temperature sensor for detecting the indoor return air temperature is generally placed in a fixed position, it can only reflect the temperature at the placement point. Since the air duct pipes are generally long, it is difficult to avoid air leakage and heat leakage during the air circulation process, resulting in inaccurate detection of the indoor return air temperature. The indoor return air temperature is the control target of the air conditioner. If the detection is inaccurate, it will cause abnormal control of the air conditioner and affect the comfort of the air conditioner.

[0058] Aiming at the problem in the prior art that the return air temperature of the air conditioner is inaccurately detected due to the return air duct being too long, causing the air conditioner to be abnormally controlled, this embodiment provides a compressor operation control method, which is applied to the air conditioner. Figure 1 The structural diagram of the existing air conditioner is as follows: Figure 1 As shown, the air conditioner includes a compressor 1, a condenser 2, a throttling component 3 and an evaporator 4, an internal fan 5 is also provided at the evaporator 4, an external fan 6 is provided at the condenser 2, and also includes a return air temperature sensor 7, an evaporator tube temperature sensor 8 and an outdoor ambient temperature sensor 9, wherein the return air temperature sensor 7 is arranged at the return air inlet of the air conditioner for detecting the air temperature at the return air inlet, the evaporator tube temperature sensor 8 is arranged at the outlet end of the evaporator for detecting the temperature of the outlet end of the evaporator, and the outdoor ambient temperature sensor 9 is arranged in the outdoor environment for detecting the outdoor ambient temperature.

[0059] Figure 2 FIG. 4 is a flow chart of a compressor operation control method according to an embodiment of the present invention. Figure 2 As shown, the compressor operation control method includes:

[0060] S101, calculating a standard return air temperature according to the evaporator tube temperature and the outdoor ambient temperature; wherein a correspondence between the standard return air temperature, the evaporator tube temperature, and the outdoor ambient temperature is pre-stored.

[0061] In specific implementation, the temperature of the outlet end of the evaporator, i.e., the evaporator tube temperature, is detected by the evaporator tube temperature sensor 8, and the outdoor ambient temperature is detected by the outdoor ambient temperature sensor 9, and then the standard return air temperature is calculated based on the two temperature values.

[0062] Different outdoor ambient temperatures and different indoor ambient temperatures will cause different compressor output loads, which will cause different system parameters. In this embodiment, before executing the above-mentioned compressor operation control method, the return air temperature under different outdoor ambient temperatures and different evaporator tube temperatures is first tested to obtain the corresponding relationship between the standard return air temperature and the evaporator tube temperature and the outdoor ambient temperature, and then store it in the system.

[0063] S102, calculating a first difference between the return air temperature detection value and the standard return air temperature, and calculating a second difference between the return air temperature detection value and the set temperature.

[0064] S103, controlling the compressor to start or stop according to the first difference and the second difference.

[0065] After the return air temperature is detected by the sensor, the accuracy of the return air temperature is determined by calculating the first difference between the return air temperature and the standard return air temperature. The compressor shutdown condition is determined by the second difference between the return air temperature detection value and the set temperature. By combining the first difference and the second difference, the compressor can be accurately controlled to start or stop.

[0066] The compressor operation control method of the present embodiment calculates the standard return air temperature according to the evaporator tube temperature and the outdoor ambient temperature based on the correspondence between the standard return air temperature and the evaporator tube temperature and the outdoor ambient temperature, and then calculates the first difference between the return air temperature detection value and the standard return air temperature, and the second difference between the return air temperature detection value and the set temperature, respectively. Whether the return air temperature is accurate is determined by calculating the first difference between the return air temperature and the standard return air temperature, and whether the compressor shutdown condition is met is determined by the second difference between the return air temperature detection value and the set temperature. The compressor is controlled to start or stop according to the above-mentioned first difference and the above-mentioned second difference, which can avoid the problem of inaccurate return air temperature detection and abnormal air conditioner control, improve the accuracy of air conditioner control, and thus improve user experience.

[0067] Due to different outdoor ambient temperatures and different indoor ambient temperatures, the compressor output load is different, which will cause different air conditioner operating parameters. By measuring the return air temperature under different ambient temperatures and different evaporator tube temperatures, the corresponding relationship between the evaporator tube temperature and the indoor return air temperature under different outdoor ambient temperatures can be obtained. Figure 3 : is a corresponding relationship diagram between the evaporator tube temperature and the indoor return air temperature at the same outdoor ambient temperature according to an embodiment of the present invention, such as Figure 3 As shown, at the same outdoor ambient temperature, the relationship between the evaporator tube temperature and the indoor return air temperature is a curve, and is positively correlated. In summary, the correspondence between the standard return air temperature, the evaporator tube temperature, and the outdoor ambient temperature is pre-stored, including: testing the return air temperature at the same outdoor temperature and different evaporator tube temperatures, and the return air temperature at the end of the return air duct at the same evaporator tube temperature and different outdoor temperatures in sequence; wherein the end of the return air duct is the end away from the room; fitting the functional relationship between the return air temperature at the end of the return air duct and the outdoor temperature and the evaporator tube temperature, and obtaining the correspondence between the standard return air temperature, the evaporator tube temperature, and the outdoor ambient temperature.

[0068] To facilitate program processing, the unknown fitting coefficient can be pre-set to establish a function model, and the obtained return air temperature, outdoor temperature, and evaporator tube temperature are substituted into the above function model to calculate the fitting coefficient. In one embodiment of the present invention, T3 = aT1 2+bT1+c / T2, that is, the corresponding relationship between the standard return air temperature and the evaporator tube temperature and the outdoor ambient temperature is:

[0069]

[0070] Among them, T1 is the standard return air temperature, T3 is the evaporator tube temperature, T2 is the outdoor ambient temperature, a is the first fitting coefficient, b is the fitting coefficient, and c is the third fitting coefficient.

[0071] It should be noted that, in this embodiment, three fitting coefficients are set, and the highest order is quadratic. However, in other embodiments of the present invention, more fitting coefficients may be set, and the highest order is more times. For example, T3=aT1 3 +bT1 2 +cT1+d / T2.

[0072] In order to compensate for the detection error of the return air temperature and thus accurately control the start and stop of the compressor, the compressor is controlled to start or stop according to the above-mentioned first difference and the above-mentioned second difference, including: determining the interval in which the first difference is located and the interval in which the second difference is located; controlling the compressor to start or stop according to the interval in which the first difference is located and the interval in which the second difference is located.

[0073] In order to avoid frequent control of compressor start and stop, the return air temperature can be allowed to fluctuate within a certain range. Compensation control is performed only when it exceeds this range. At the same time, after the return air temperature is in a certain interval, the compressor can be controlled to maintain the current operating state unchanged. When it exceeds this interval, the operating state of the compressor is controlled to change. Therefore, the compressor is controlled to start or stop according to the interval in which the first difference value is located and the interval in which the second difference value is located, including: if the first difference value is less than the lower limit of the first preset interval, it indicates that the currently detected return air temperature is low, and the actual return air temperature has not dropped to the detection value, so the compressor is controlled to start and continue to run; if the first difference value is greater than the upper limit of the first preset interval, it indicates that the currently detected return air temperature is high, and the actual return air temperature has dropped below the detection value, so the compressor is controlled to stop; if the first difference value is greater than the first preset interval, it indicates that the difference between the return air temperature detection value and the actual return air temperature is small, and the influence of the detection error can be ignored, then the compressor can continue to be controlled to start or stop according to the interval in which the second difference value is located.

[0074] In order to further accurately control the start and stop of the compressor, ensure that the indoor temperature reaches the set temperature, and avoid frequent start and stop of the compressor, the compressor is controlled to start or stop according to the interval in which the second difference is located, including: if the second difference is less than the lower limit of the second preset interval, indicating that the indoor ambient temperature is already lower than the set temperature, the compressor is controlled to stop; if the second difference is within the second preset interval, or is greater than the upper limit of the second preset interval, indicating that the indoor ambient temperature has not reached the set temperature, the compressor is controlled to start and continue to run.

[0075] After the compressor is controlled to stop, the indoor ambient temperature will rise again. In order to make the indoor ambient temperature always near the set temperature, the above-mentioned compressor operation control method also includes: after the compressor is controlled to stop, continue to control the compressor to start or stop according to the interval of the first difference and the interval of the second difference.

[0076] Similarly, in order to avoid frequent control of compressor start and stop, the return air temperature can be allowed to fluctuate within a certain range. Compensation control is performed only when it exceeds this range. At the same time, after the return air temperature is in a certain interval, the compressor can be controlled to maintain the current operating state unchanged. When it exceeds this interval, the operating state of the compressor is controlled to change. The compressor is controlled to start or stop according to the interval in which the above-mentioned first difference value is located and the interval in which the above-mentioned second difference value is located, including: if the first difference value is less than the lower limit of the first preset interval, it indicates that the currently detected return air temperature is low, and the actual return air temperature has not dropped to the detection value, so the compressor is controlled to start; if the first difference value is greater than the upper limit of the first preset interval, it indicates that the currently detected return air temperature is high, and the actual return air temperature has dropped below the detection value, so the compressor is controlled to stop; if the first difference value is greater than the first preset interval, it indicates that the difference between the return air temperature detection value and the actual return air temperature is small, and the influence of the detection error can be ignored, then the compressor can continue to be controlled to start or stop according to the interval in which the second difference value is located.

[0077] In order to further accurately control the start and stop of the compressor, ensure that the indoor temperature reaches the set temperature, and avoid frequent start and stop of the compressor, the compressor is controlled to start or stop according to the interval in which the second difference is located, including: if the above-mentioned second difference is less than the lower limit of the second preset interval, or is within the second preset interval, the compressor is controlled to stop, that is, maintain the current operating state; if the above-mentioned second difference is greater than the upper limit of the second preset interval, the compressor is controlled to start.

[0078] Example 2

[0079] This embodiment provides another compressor operation control method. The air conditioner of this embodiment is an integrated type, including a compressor, a condenser, an evaporator, a throttling component, an indoor fan, an outdoor fan, etc. It also includes a control component, an indoor return air temperature sensor, an outdoor return air temperature sensor, and an indoor evaporator pipe temperature sensor.

[0080] Different outdoor ambient temperatures and different indoor ambient temperatures will cause different compressor output loads, which will cause different system parameters. By measuring the unit operating parameters at different ambient temperatures, the difference between the evaporator tube temperature and the indoor return air temperature at different outdoor ambient temperatures can be obtained. For the convenience of program processing, the following fitting formula can be used for processing. The specific coefficient value is only an example and is not specifically limited.

[0081] In this embodiment, the functional relationship between the evaporator tube temperature T3, the outdoor ambient temperature T2 and the wind temperature detection value T1 is expressed as: T3 = aT1 2 +bT1+c / T2, in specific implementation, a=-0.018; b=1.19; c=-98 can be set.

[0082] In cooling mode, the evaporator tube temperature T3 and the outdoor ambient temperature T2 are detected during the operation of the air conditioner, and the standard return air temperature is calculated based on the evaporator tube temperature T3 and the outdoor ambient temperature T2. The return air temperature detection value is compared with the standard return air temperature. According to the difference between the return air temperature detection value and the standard return air temperature, it is determined whether the return air temperature needs to be corrected. Combined with the difference with the set temperature, it is accurately judged whether it is necessary to shut down at the temperature point to avoid the problem of frequent starting and stopping of the compressor due to the actual temperature not reaching the user setting, which affects comfort.

[0083] Specifically, after the compressor runs for a preset time (for example, 5 minutes), the system state tends to be stable. At this time, the return air temperature, evaporator tube temperature and outdoor ambient temperature are detected synchronously. The indoor return air temperature sensor temperature T1 is detected and the average value is taken every 40 seconds; the outdoor return air temperature sensor temperature T2 is detected and the average value is taken every 40 seconds; the evaporator tube temperature sensor temperature T3 is detected and the average value is taken every 40 seconds, recorded as T3;

[0084] According to T3 and T2, and the formula T3 = aT1 2 +bT1+c / T2, the standard return air temperature T10 can be calculated. By judging the difference between the return air temperature detection values ​​T1 and T10, the difference between the unit's detected return air temperature and the calculated return air temperature is marked:

[0085]

[0086] On the other hand, the difference between T1A and T setting is determined to preliminarily mark the next operating status of the compressor.

[0087] T1A-T Settings ＜-1 -1～1 ≥1 Compressor marking stop maintain open

[0088] Based on the return air compensation mark and the compressor mark, the following table is processed for the next operation control of the unit compressor:

[0089]

[0090]

[0091] When the compressor stops, there is no heat exchange in the indoor evaporator, and T10 = T3. The next step of the compressor operation control is handled according to the following table:

[0092] Return air compensation mark:

[0093]

[0094] Compressor marking:

[0095] T1A-T Settings ＜-1 -1～1 ≥1 Compressor marking stop maintain open

[0096]

[0097] The compressor operation control method of this embodiment controls the start and stop of the air conditioner based on the actual operating status parameters of the air conditioner, avoids the problem of large temperature detection deviation caused by too long air duct, and solves the problem that the return air temperature cannot be accurately reflected due to the single return air temperature sensing package.

[0098] Example 3

[0099] This embodiment provides a compressor operation control device, Figure 4 : is a structural block diagram of a compressor operation control device according to an embodiment of the present invention. Figure 4 As shown, the compressor operation control device includes:

[0100] The first calculation module 10 is used to calculate the standard return air temperature according to the evaporator tube temperature and the outdoor ambient temperature; wherein the corresponding relationship between the standard return air temperature, the evaporator tube temperature and the outdoor ambient temperature is pre-stored.

[0101] Different outdoor ambient temperatures and different indoor ambient temperatures will cause different compressor output loads, which will cause different system parameters. In this embodiment, before executing the above-mentioned compressor operation control method, the return air temperature under different outdoor ambient temperatures and different evaporator tube temperatures is first tested to obtain the corresponding relationship between the standard return air temperature and the evaporator tube temperature and the outdoor ambient temperature, and then store it in the system.

[0102] The second operation module 20 is used to calculate a first difference between the return air temperature detection value and the standard return air temperature; and to calculate a second difference between the return air temperature detection value and the set temperature.

[0103] The control module 30 is used to control the compressor to start or stop according to the first difference and the second difference.

[0104] After the return air temperature is detected by the sensor, the accuracy of the return air temperature is determined by calculating the first difference between the return air temperature and the standard return air temperature. The compressor shutdown condition is determined by the second difference between the return air temperature detection value and the set temperature. By combining the first difference and the second difference, the compressor can be accurately controlled to start or stop.

[0105] The compressor operation control device of the present embodiment calculates the standard return air temperature according to the evaporator tube temperature and the outdoor ambient temperature based on the correspondence between the standard return air temperature and the evaporator tube temperature and the outdoor ambient temperature, and then respectively calculates the first difference between the return air temperature detection value and the standard return air temperature, and calculates the second difference between the return air temperature detection value and the set temperature. The compressor is controlled to be started or stopped according to the above-mentioned first difference and the above-mentioned second difference, which can avoid the problem of inaccurate return air temperature detection and abnormal air conditioner control, thereby improving the accuracy of air conditioner control and thus improving user experience.

[0106] In order to compensate for the detection error of the return air temperature and thus accurately control the start and stop of the compressor, the control module 30 controls the compressor to start or stop according to the above-mentioned first difference and the above-mentioned second difference, and specifically performs the following operations: determining the interval in which the above-mentioned first difference is located and the interval in which the above-mentioned second difference is located; controlling the compressor to start or stop according to the interval in which the first difference is located and the interval in which the second difference is located.

[0107] In order to avoid frequent control of compressor start and stop, the return air temperature can be allowed to fluctuate within a certain range. Compensation control is performed only when it exceeds this range. At the same time, after the return air temperature is in a certain interval, the compressor can be controlled to maintain the current operating state unchanged. When it exceeds this interval, the operating state of the compressor is controlled to change. Therefore, when the control module 30 controls the compressor to start or stop according to the interval where the above-mentioned first difference is located and the interval where the above-mentioned second difference is located, the following specific operations are performed: when the first difference is less than the lower limit of the first preset interval, it indicates that the currently detected return air temperature is low, and the return air temperature has not actually dropped to the detection value, so the compressor is controlled to start and continue to run; when the first difference is greater than the upper limit of the first preset interval, it indicates that the currently detected return air temperature is high, and the return air temperature has actually dropped below the detection value, so the compressor is controlled to stop; when the first difference is greater than the first preset interval, it indicates that the difference between the return air temperature detection value and the actual return air temperature is small, and the influence of the detection error can be ignored. Therefore, the compressor can continue to be controlled to start or stop according to the interval where the second difference is located.

[0108] In order to further accurately control the start and stop of the compressor, ensure that the indoor temperature reaches the set temperature, and avoid frequent start and stop of the compressor, the control module 30 performs the following operations when controlling the compressor to start or stop according to the interval in which the second difference is located: when the above-mentioned second difference is less than the lower limit of the second preset interval, it indicates that the indoor ambient temperature is already lower than the set temperature, and the compressor is controlled to stop; when the second difference is within the second preset interval, or is greater than the upper limit of the second preset interval, it indicates that the indoor ambient temperature has not reached the set temperature, and the compressor is controlled to start and continue to run.

[0109] After the compressor is controlled to stop, the indoor ambient temperature will rise again. In order to make the indoor ambient temperature always near the set temperature, the control module 30 is also used to: after the compressor is controlled to stop, continue to control the compressor to start or stop according to the interval of the first difference and the interval of the second difference.

[0110] Similarly, in order to avoid frequent control of compressor start and stop, the return air temperature can be allowed to fluctuate within a certain range. Compensation control is performed only when it exceeds this range. At the same time, after the return air temperature is in a certain interval, the compressor can be controlled to maintain the current operating state unchanged. When it exceeds this interval, the operating state of the compressor is controlled to change. The control module 30 controls the compressor to start or stop according to the interval in which the first difference is located and the interval in which the second difference is located, including: if the first difference is less than the lower limit of the first preset interval, it indicates that the currently detected return air temperature is low, and the actual return air temperature has not dropped to the detection value, so the compressor is controlled to start; if the first difference is greater than the upper limit of the first preset interval, it indicates that the currently detected return air temperature is high, and the actual return air temperature has dropped below the detection value, so the compressor is controlled to stop; if the first difference is greater than the first preset interval, it indicates that the difference between the return air temperature detection value and the actual return air temperature is small, and the influence of the detection error can be ignored, then the compressor can continue to be controlled to start or stop according to the interval in which the second difference is located.

[0111] In order to further accurately control the start and stop of the compressor, ensure that the indoor temperature reaches the set temperature, and avoid frequent start and stop of the compressor, the control module 30 performs the following operations when controlling the compressor to start or stop according to the interval in which the above-mentioned second difference is located: when the above-mentioned second difference is less than the lower limit of the second preset interval, or is within the second preset interval, the compressor is controlled to stop, that is, to maintain the current operating state; when the above-mentioned second difference is greater than the upper limit of the second preset interval, the compressor is controlled to start.

[0112] Example 4

[0113] The present embodiment provides an air conditioner, including a compressor, a condenser, a throttling component and an evaporator, and also includes the compressor operation control device of the above embodiment, which is used to solve the problem of inaccurate return air temperature detection causing abnormal air conditioner control, improve the accuracy of air conditioner control, and thereby improve user experience.

[0114] Example 5

[0115] This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the compressor operation control method of the above embodiment is implemented.

[0116] Example 6

[0117] This embodiment provides an electronic device, including:

[0118] one or more processors;

[0119] A storage device is used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the compressor operation control method of the above embodiment.

[0120] Figure 5 FIG. 1 is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Figure 5 As shown, the electronic device includes:

[0121] One or more processors 510 and memory 520, Figure 5 A processor 510 is taken as an example.

[0122] The electronic device may further include: an input device 530 and an output device 540 .

[0123] The processor 510, the memory 520, the input device 530 and the output device 540 may be connected via a bus or other means. Figure 5 The example of connecting through bus is taken in the following.

[0124] The memory 520 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules corresponding to the compressor operation control method in the embodiment of the present invention. The processor 510 executes various functional applications and data processing of the server by running the non-volatile software programs, instructions and modules stored in the memory 520, that is, realizing the above method embodiment.

[0125] The memory 520 may include a program storage area and a data storage area, wherein the program storage area may store an application required for the operating device and at least one function; the data storage area may store data created according to the use of the compressor operation control device, etc. In addition, the memory 520 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0126] The input device 530 can receive input digital or character information and generate key signal input related to user settings and function control of the electronic device. The output device 540 can include a display device such as a display screen.

[0127] The one or more modules are stored in the memory 520, and when executed by the one or more processors 510, the compressor operation control method in any of the above method embodiments is executed.

[0128] The electronic device can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not described in detail in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0129] The electronic devices of the embodiments of the present invention exist in various forms, including but not limited to:

[0130] (1) Mobile communication devices: These devices are characterized by their mobile communication functions and their main purpose is to provide voice and data communications. These terminals include: smart phones (such as iPhone), multimedia phones, functional phones, and low-end phones.

[0131] (2) Ultra-mobile personal computer devices: These devices fall into the category of personal computers, have computing and processing capabilities, and generally also have mobile Internet access features. These terminals include: PDA, MID and UMPC devices, such as iPad.

[0132] (3) Portable entertainment devices: These devices can display and play multimedia content. They include audio and video players (such as iPods), handheld game consoles, e-books, as well as smart toys and portable car navigation devices.

[0133] (4) Server: A device that provides computing services. The server consists of a processor, hard disk, memory, device bus, etc. The server is similar to the general computer architecture, but because it needs to provide highly reliable services, it has higher requirements in terms of processing power, stability, reliability, security, scalability, manageability, etc.

[0134] (5) Other electronic devices with data interaction functions, such as televisions, large-screen cars, etc.

[0135] The device embodiments described above are merely illustrative, wherein the modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, i.e., they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0136] 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.

[0137] 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. A compressor operation control method, applied to an air conditioner, wherein the air conditioner comprises a compressor, a condenser, a throttling component and an evaporator, characterized in that: The method comprises: The standard return air temperature is calculated according to the evaporator tube temperature and the outdoor ambient temperature; wherein the corresponding relationship between the standard return air temperature, the evaporator tube temperature and the outdoor ambient temperature is pre-stored; Calculating a first difference between a return air temperature detection value and the standard return air temperature, and calculating a second difference between the return air temperature detection value and a set temperature; The compressor is controlled to start or stop according to the first difference and the second difference.

2. The method according to claim 1, characterized in that The corresponding relationship between the standard return air temperature, evaporator tube temperature and outdoor ambient temperature is pre-stored, including: Test the return air temperature at the same outdoor temperature and different evaporator tube temperatures, and the return air temperature at the end of the return air duct at the same evaporator tube temperature and different outdoor temperatures. The functional relationship between the return air temperature, the outdoor temperature, and the evaporator tube temperature is fitted to obtain the corresponding relationship between the standard return air temperature, the evaporator tube temperature, and the outdoor ambient temperature.

3. The method according to claim 1, characterized in that The corresponding relationship between the standard return air temperature, the evaporator tube temperature, and the outdoor ambient temperature is: Among them, T1 is the standard return air temperature, T3 is the evaporator tube temperature, T2 is the outdoor ambient temperature, a is the first fitting coefficient, b is the fitting coefficient, and c is the third fitting coefficient.

4. The method according to claim 1, characterized in that: Controlling the compressor to start or stop according to the first difference and the second difference includes: Determine an interval in which the first difference value is located and an interval in which the second difference value is located; The compressor is controlled to start or stop according to the interval in which the first difference value is located and the interval in which the second difference value is located.

5. The method according to claim 4, characterized in that Controlling the compressor to start or stop according to the interval in which the first difference value is located and the interval in which the second difference value is located, comprises: If the first difference is less than a lower limit of a first preset interval, controlling the compressor to start; If the first difference is greater than the upper limit of the first preset interval, controlling the compressor to stop; If the first difference is greater than and is within the first preset interval, the compressor is controlled to start or stop according to the interval in which the second difference is located.

6. The method according to claim 5, characterized in that Controlling the compressor to start or stop according to the interval in which the second difference is located includes: If the second difference is less than a lower limit of a second preset interval, controlling the compressor to stop; If the second difference is within the second preset interval, or is greater than an upper limit of the second preset interval, the compressor is controlled to start.

7. The method according to claim 5 or 6, characterized in that: After controlling the compressor to stop, the method further includes: Continue to control the compressor to start or stop according to the interval in which the first difference value is located and the interval in which the second difference value is located.

8. The method according to claim 7, characterized in that Controlling the compressor to start or stop according to the interval in which the first difference value is located and the interval in which the second difference value is located, comprises: If the first difference is less than a lower limit of a first preset interval, controlling the compressor to start; If the first difference is greater than the upper limit of the first preset interval, controlling the compressor to stop; If the first difference is greater than and is within the first preset interval, the compressor is controlled to start or stop according to the interval in which the second difference is located.

9. The method according to claim 8, characterized in that Controlling the compressor to start or stop according to the interval in which the second difference is located includes: If the second difference is less than a lower limit of a second preset interval, or is within the second preset interval, controlling the compressor to stop; If the second difference is greater than the upper limit of the second preset interval, the compressor is controlled to be turned on.

10. A compressor operation control device, characterized in that: The device comprises: The first calculation module is used to calculate the standard return air temperature according to the evaporator tube temperature and the outdoor ambient temperature; wherein the correspondence between the standard return air temperature, the evaporator tube temperature and the outdoor ambient temperature is pre-stored; A second operation module is used to calculate a first difference between the return air temperature detection value and the standard return air temperature; and calculate a second difference between the return air temperature detection value and the set temperature; A control module is used to control the compressor to start or stop according to the first difference and the second difference.

11. An air conditioner, comprising a compressor, a condenser, a throttling component and an evaporator, characterized in that: It also includes the compressor operation control device according to claim 10.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 9 is implemented.

13. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs, which, when executed by the one or more processors, enables the one or more processors to implement the method according to any one of claims 1 to 9.

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