Self-cleaning control method for air conditioner

Abstract

The invention relates to the technical field of air conditioner self-cleaning, in particular to an air conditioner self-cleaning control method. When the air conditioner enters an outdoor unit self-cleaning mode, the temperature change value T ring temperature difference of an outdoor unit installation position brought by refrigeration operation of the air conditioner is calculated, the sealing state of the outdoor unit installation position is judged according to the value of the T ring temperature difference, the air conditioner outdoor unit self-cleaning standard parameters are corrected according to the sealing state, and the value of the T ring temperature difference is in positive correlation with the amplitude of the corrected parameters. According to the air conditioner self-cleaning control method, the air conditioner outdoor units located in different closed spaces can be efficiently cleaned, and the air conditioner self-cleaning control method has the advantage of being high in cleaning efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioner self-cleaning, and in particular to an air conditioner self-cleaning control method. Background Art

[0002] The air conditioner's self-cleaning function for the outdoor unit is mainly achieved through the following stages: condensation stage: during the air conditioner's heating cycle, condensed water will be generated on the surface of the outdoor unit, and this condensed water will combine with dust; frosting stage: when the condensed water covers the surface of the condenser, the outdoor unit of the air conditioner will quickly cool down and frost. During this process, the expansion of the frost can separate the dust from the surface of the evaporator; defrosting stage: when the frost layer reaches a certain thickness, the air conditioner will quickly switch to a refrigeration cycle, and the condenser will quickly defrost and drain water to wash away the dust.

[0003] In order to pursue the beauty of the building facade, commercial housing will add decorative structures such as blinds to the installation position of the air conditioner outdoor unit. Such decorative structures will cause the installation position of the air conditioner outdoor unit to be in a closed space. In the following, such positions are referred to as closed outdoor unit installation positions. The opposite of closed outdoor unit installation positions is open units. The air circulation in the closed outdoor unit installation position is blocked, resulting in the failure of the outdoor unit to condense enough condensation water and form a thick enough frost layer during the self-cleaning process, thereby weakening the effect of the outdoor unit's self-cleaning. Summary of the invention

[0004] The purpose of the present invention is to avoid the deficiencies in the prior art and provide an air conditioner self-cleaning control method, which can efficiently clean the air conditioner outdoor units located in different closed spaces and has the advantage of high cleaning efficiency.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] Provide an air conditioner self-cleaning control method, including:

[0007] When the air conditioner enters the outdoor unit self-cleaning mode, calculate the temperature change value T of the outdoor unit installation position before and after the air conditioner refrigeration operation 环温差 , according to T 环温差 Determine the sealing status of the outdoor unit installation position and correct the self-cleaning standard parameters of the air conditioner outdoor unit, T 环温差 The value of is positively correlated with the amplitude of the correction parameter, and the self-cleaning correction parameter is obtained. The self-cleaning correction parameter is used to operate the air conditioner self-cleaning mode.

[0008] In some embodiments, T 环温差 The calculation method is as follows:

[0009] T 环温差 =T 稳定 -T 开机 ,

[0010] in,

[0011] T 开机 The ambient temperature of the outdoor unit installation location when the air conditioner was last turned on for cooling;

[0012] T 稳定 It is the stable ambient temperature of the outdoor unit installation location after the air conditioner last ran in cooling mode.

[0013] In some embodiments, the T 稳定 The way to obtain is as follows:

[0014] At the preset time t 变化 Calculate the change in ambient temperature T at the installation location of the external unit 变化 , if T 变化 <T 设 , T 设 If the temperature is the preset value, the ambient temperature of the external unit installation location is considered stable and the real-time temperature is recorded as T 稳定 .

[0015] In some embodiments, the self-cleaning standard parameters include the external fan speed F during the self-cleaning condensation stage. 凝露标准 , F 凝露标准 The correction method is as follows:

[0016] F 凝露 =F 凝露标准 +C F凝露 ,

[0017] Among them, C F凝露 is the correction factor of the external fan speed,

[0018] F 凝露 is the self-cleaning correction parameter of the external fan speed,

[0019] When T 环温差 ≤T1, T1 is the preset value, C F凝露 =0; when T 环温差 >T1, with T 环温差 Increase, C F凝露 Gradually increase to the maximum value MAXC F凝露 .

[0020] In some embodiments, the self-cleaning standard parameters include the target external pipe temperature T during the self-cleaning condensation phase. 凝露标准， T 凝露标准 The corrections also include:

[0021] T 凝露 =T 凝露标准 +C T凝露 ,

[0022] Among them, C T凝露 is the correction coefficient of the target external pipe temperature,

[0023] T 凝露 is the self-cleaning correction parameter of the target external tube temperature,

[0024] When T 环温差 ≤T1, T1 is the preset value, C T凝露 =0; when T 环温差 >T1,C T凝露 is negative, and as T 环温差 Increase, C T凝露 Gradually decrease until it reaches the minimum value MINC T凝露 .

[0025] In some embodiments, the self-cleaning standard parameters include the target operating time t of the self-cleaning condensation phase. 凝露标准 , t 凝露标准 The correction method is as follows:

[0026] t 凝露 =t 凝露标准 +C t凝露 ,

[0027] Among them, C t凝露 is the correction factor for the target operating time in the condensation stage,

[0028] t 凝露 is the self-cleaning correction parameter for the target run time,

[0029] When T 环温差 ≤T1, T1 is the preset value, C t凝露 =0, when T 环温差 >T1, with T 环温差 Improve, C t凝露 Gradually increase until the maximum value MAXC is reached t凝露 .

[0030] In some embodiments, the self-cleaning standard parameters include the external fan speed F during the self-cleaning frosting stage. 结霜标准 , F 结霜标准 The correction method is as follows:

[0031] F 结霜 =F 结霜标准 +C F结霜 ,

[0032] Among them, C F结霜 is the correction factor of the external fan speed,

[0033] F 结霜 is the self-cleaning correction parameter of the external fan speed,

[0034] When T 环温差 ≤T2, T2 is the preset value, C F结霜 =0; when T环温差 >T2, with T 环温差 Increase, C F结霜 Gradually increase to the maximum value MAXC F结霜 .

[0035] In some embodiments, the self-cleaning standard parameters include the target external tube temperature T during the self-cleaning frosting stage. 结霜标准， T 结霜标准 The corrections also include:

[0036] T 结霜 =T 结霜标准 +C T结霜 ,

[0037] Among them, C T结霜 is the correction coefficient of the target external pipe temperature,

[0038] T 结霜 is the self-cleaning correction parameter of the target external tube temperature,

[0039] When T 环温差 ≤T2, T2 is the preset value, C T结霜 =0; when T 环温差 >T2, C T结霜 is negative, and as T 环温差 Increase, C T结霜 Gradually decrease until it reaches the minimum value MINC T结霜 .

[0040] In some embodiments, the self-cleaning standard parameters include a target operating time t of the self-cleaning frosting phase. 结霜标准 , t 结霜标准 The correction method is as follows:

[0041] t 结霜 =t 结霜标准 +C t结霜 ,

[0042] Among them, C t结霜 is the correction factor for the target operating time in the frosting stage,

[0043] t 结霜 is the self-cleaning correction parameter for the target run time,

[0044] When T 环温差 ≤T2, T2 is the preset value, C t结霜 =0, when T 环温差 >T2, with T 环温差 Improve, C t结霜 Gradually increase until the maximum value MAXC is reached t结霜 .

[0045] In some embodiments, when entering the condensation stage, the speed of the external fan is F 凝露 , and at the same time control the internal fan speed and compressor speed to reduce the target external tube temperature until the real-time target external tube temperature reaches T 凝露 And keep it, start timing, and make the condensation stage run time t 凝露 .

[0046] In some embodiments, when entering the frosting stage, the external fan stops running, so that the target external tube temperature drops to T 结霜 , start timing, and make the frosting stage run for time t 结霜 .

[0047] Beneficial effects of the air conditioner self-cleaning control method of the present invention:

[0048] The air conditioner self-cleaning control method of the present invention uses the ambient temperature change T caused by the air conditioner outdoor unit before the air conditioner outdoor unit self-cleans. 环温差 To judge the closed state of the space where the air conditioner is located, that is, the more closed the space where the air conditioner is located, the more heat will be accumulated in the space, T 环温差 The larger the value, the greater the value. 环温差 The self-cleaning parameters of the external unit are corrected to make the self-cleaning operation more accurate, which can effectively improve the self-cleaning effect of the air conditioner outdoor unit in the closed outdoor unit installation position, overcoming the problem that the air circulation in the machine position is blocked due to the closed space, so that the self-cleaning process of the outdoor unit cannot condense enough condensation water and form a thick enough frost layer, resulting in poor self-cleaning effect of the outdoor unit. Therefore, by judging the degree of closure of the outdoor unit installation position and correcting the relevant operating parameters according to the degree of closure of the outdoor unit installation position, the self-cleaning of the outdoor unit can adapt to different machine positions, and the operating parameters are more accurate and the effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a flow chart of the air conditioner self-cleaning control method according to an embodiment of the present invention.

[0050] Figure 2 is the correction value C of the external fan speed in the condensation stage of Example 3 F凝露 Assignment table.

[0051] Figure 3 is the correction value C of the target external pipe temperature in the condensation stage of Example 3 T凝露 Assignment diagram.

[0052] Figure 4 is the correction value C of the target operating time in the condensation stage of Example 3 t凝露 Assignment diagram. DETAILED DESCRIPTION

[0053] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0054] The terms used in the present invention are only for the purpose of describing specific implementation regulations, and are not intended to limit the present invention. The singular forms "a", "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0055] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0056] Example 1

[0057] In order to pursue the beauty of the building facade, commercial housing will add decorative structures such as blinds to the installation position of the air conditioner outdoor unit. Such decorative structures will cause the installation position of the air conditioner outdoor unit to be in a closed space. In the following, such positions are referred to as closed outdoor unit installation positions. The opposite of closed outdoor unit installation positions is open units. The air circulation in the closed outdoor unit installation position is blocked, resulting in the failure of the outdoor unit to condense enough condensation water and form a thick enough frost layer during the self-cleaning process, thereby weakening the effect of the outdoor unit's self-cleaning.

[0058] In this regard, this embodiment discloses an air conditioner self-cleaning control method, including:

[0059] When the air conditioner enters the outdoor unit self-cleaning mode, calculate the temperature change value T of the outdoor unit installation position caused by the air conditioner cooling operation 环温差 , according to T 环温差 The value of determines the sealing status of the outdoor unit installation position, and modifies the self-cleaning standard parameters of the air conditioner outdoor unit according to the sealing status. 环温差 The value of is positively correlated with the amplitude of the correction parameter, and the self-cleaning correction parameter is obtained. Then the corrected self-cleaning operation parameter is used to operate the air conditioner self-cleaning mode.

[0060] Before the air conditioner outdoor unit self-cleans, the ambient temperature change T caused by the air conditioner outdoor unit is used. 环温差 To judge the closed state of the space where the air conditioner is located, that is, the more closed the space where the air conditioner is located, the more heat will be accumulated in the space, T 环温差 The larger the value, the greater the value. 环温差 The self-cleaning parameters of the outdoor unit are corrected to make the self-cleaning operation more accurate, which can effectively improve the self-cleaning effect of the outdoor unit of the air conditioner in the closed outdoor unit installation position, overcoming the traditional problem that the air circulation in the unit is blocked due to the closed space, resulting in the failure to condense enough condensation water and form a thick enough frost layer during the self-cleaning process of the outdoor unit, resulting in poor self-cleaning effect of the outdoor unit.

[0061] In this embodiment, T 环温差 The calculation method is as follows:

[0062] T 环温差 =T 稳定 -T 开机 ,

[0063] in,

[0064] T 开机 The ambient temperature of the outdoor unit installation location when the air conditioner was last turned on for cooling;

[0065] T 稳定 It is the stable ambient temperature of the outdoor unit installation location after the air conditioner last ran in cooling mode.

[0066] Specifically, when the air conditioner outdoor unit is in cooling operation for the last time, the ambient temperature T of the outdoor unit installation position when the air conditioner is turned on is recorded. 开机 Then the air conditioner outdoor unit continues to run for a certain period of time. When the ambient temperature of the outdoor unit installation location is stable, T is recorded. 稳定 , so we can get T 环温差 , the more closed the outdoor unit installation position is, the more heat will be accumulated in the outdoor unit installation position, so T 环温差 The larger the T 环温差 To select appropriate self-cleaning correction parameters.

[0067] In this embodiment, the T 稳定 The way to obtain is as follows:

[0068] At the preset time t 变化 Calculate the ambient temperature change value T of the outdoor unit installation location 变化 , if T 变化 <T 设 , T 设 If the temperature is the preset value, the ambient temperature of the external unit installation location is considered stable and the real-time T 稳定 .

[0069] When the set time t 变化The change value of the ambient temperature at the installation position of the internal and external units T 变化 If there is no change or the change is small, it means that the temperature of the outdoor unit installation position has stabilized and can be used as T 稳定 , which can accurately capture T 稳定 , improve the accuracy of judgment of enclosed spaces.

[0070] In this embodiment, the self-cleaning standard parameters include the external fan speed F during the self-cleaning condensation stage. 凝露标准 , F 凝露标准 The correction method is as follows:

[0071] F 凝露 =F 凝露标准 +C F凝露 ,

[0072] Among them, C F凝露 is the correction factor of the external fan speed,

[0073] F 凝露 is the self-cleaning correction parameter of the external fan speed,

[0074] When T 环温差 ≤T1, T1 is the preset value, C F凝露 =0; when T 环温差 >T1, with T 环温差 Increase, C F凝露 Gradually increase to the maximum value MAXC F凝露 .

[0075] The target outer tube needs to be self-cleaned, so it is necessary to detect T in the condensation stage. 环温差 , T 环温差 Compare with the set value T1 to determine T 环温差 Does the change range of need to be corrected? 环温差变 If the change is small, no correction is needed. F凝露 = 0, otherwise, as T 环温差 Increase, C F凝露 Gradually increase to the maximum value MAXC F凝露 , reaching the maximum value MAXC F凝露 It will no longer change, avoiding excessive correction.

[0076] In this embodiment, the self-cleaning standard parameters include the target outer tube temperature T in the self-cleaning condensation stage. 凝露标准 , T 凝露标准 The correction method is as follows:

[0077] T 凝露标准 The corrections also include:

[0078] T 凝露 =T 凝露标准 +CT凝露 ,

[0079] Among them, C T凝露 is the correction coefficient of the target external pipe temperature,

[0080] T 凝露 is the self-cleaning correction parameter of the target external tube temperature,

[0081] When T 环温差 ≤T1, T1 is the preset value, C T凝露 =0; when T 环温差 >T1,C T凝露 is negative, and as T 环温差 Increase, C T凝露 Gradually decrease until it reaches the minimum value MINC T凝露 .

[0082] The target outer tube needs to be self-cleaned, so it is necessary to detect T in the condensation stage. 环温差 , T 环温差 Compare with the set value T1 to determine T 环温差 Does the change range of need to be corrected? 环温差变 If the change is small, no correction is needed. T凝露 = 0, otherwise, since the more closed the installation position of the outdoor unit is, the lower the condensation requirement will be, so as T 环温差 Increase, C T凝露 Gradually decrease until the minimum value MINC T凝露 , reaching the minimum value MINC T凝露 It will no longer change, avoiding excessive correction.

[0083] In this embodiment, the self-cleaning standard parameters include the target running time t of the self-cleaning condensation stage. 凝露标准 , t 凝露标准 The correction method is as follows:

[0084] t 凝露 =t 凝露标准 +C t凝露 ,

[0085] Among them, C t凝露 is the correction factor for the target operating time in the condensation stage,

[0086] t 凝露 is the self-cleaning correction parameter for the target run time,

[0087] When T 环温差 ≤T1, T1 is the preset value, C T凝露 =0, when T 环温差 >T1, with T 环温差 Improve, C t凝露 Gradually increase until the maximum value MAXC is reachedt凝露 .

[0088] Sufficient cleaning time must be ensured during the self-cleaning phase, so the T of the condensation phase needs to be detected. 环温差 , T 环温差 Compare with the set value T1 to determine T 环温差 Does the change range of need to be corrected? 环温差变 If the change is small, no correction is needed. t凝露 = 0, otherwise, as T 环温差 Increase, C T凝露 Gradually increase until MAXC T凝露 , reaching the maximum value MAXC t凝露 It will no longer change, avoiding excessive correction.

[0089] In this embodiment, when entering the condensation stage, the speed of the external fan is F 凝露 , and at the same time control the internal fan speed and compressor speed to reduce the target external tube temperature until the real-time target external tube temperature reaches T 凝露 And keep it, start timing, and make the condensation stage run time t 凝露 run.

[0090] In this embodiment, when entering the frosting stage, the external fan stops running, so that the target external tube temperature drops to T 结霜 , start timing, and let the frosting stage run for time t 结霜 .

[0091] Example 2

[0092] The parameter correction method in the defrosting stage and the condensation stage is the same. This embodiment discloses the self-cleaning standard parameters based on the embodiment 1, including the external fan speed F in the self-cleaning frosting stage. 结霜标准 , F 结霜标准 The correction method is as follows:

[0093] F 结霜 =F 结霜标准 +C F结霜 ,

[0094] Among them, C F结霜 is the correction factor of the external fan speed,

[0095] F 结霜 is the self-cleaning correction parameter of the external fan speed,

[0096] When T 环温差 ≤T2, T2 is the preset value, C F结霜 =0; when T 环温差 >T2, with T 环温差 Increase, C F结霜 Gradually increase to the maximum value MAXCF结霜 .

[0097] In this embodiment, the self-cleaning standard parameters include the target outer tube temperature T in the self-cleaning frosting stage. 结霜标准 ,T 结霜标准 The corrections also include:

[0098] T 结霜 =T 结霜标准 +C T结霜 ,

[0099] Among them, C T结霜 is the correction coefficient of the target external pipe temperature,

[0100] T 结霜 is the self-cleaning correction parameter of the target external tube temperature,

[0101] When T 环温差 ≤T2, T2 is the preset value, C T结霜 =0; when T 环温差 >T2, C T结霜 is negative, and as T 环温差 Increase, C T结霜 Gradually decrease until it reaches the minimum value MINC T结霜 .

[0102] In this embodiment, the self-cleaning standard parameters include the target running time t of the self-cleaning frosting stage. 结霜标准 , t 结霜标准 The correction method is as follows:

[0103] t 结霜 =t 结霜标准 +C t结霜 ,

[0104] Among them, C t结霜 is the correction factor for the target operating time in the frosting stage,

[0105] t 结霜 is the self-cleaning correction parameter for the target run time,

[0106] When T 环温差 ≤T2, T2 is the preset value, C t结霜 =0, when T 环温差 >T2, with T 环温差 Improve, C t结霜 Gradually increase until the maximum value MAXC is reached t结霜 .

[0107] Example 3

[0108] To illustrate the self-cleaning control method of the entire air conditioner, Figure 1 As shown, this embodiment specifically discloses:

[0109] Step S101

[0110] The air conditioner enters the outdoor unit self-cleaning mode, and the system obtains the T recorded in the last cooling operation. 环温差 , which is used to determine the degree of enclosure of the outdoor unit installation position. At the same time, the system preset standard parameters, that is, the parameters that have not been corrected, are obtained. Among them, the standard parameters include the target external pipe temperature T in the condensation stage 凝露标准 , external fan speed F 凝露标准 , target running time T 凝露标准 . Judgment value of external pipe temperature in frosting stage t 结霜标准 , target running time t 结霜标准 .

[0111] The principle of the degree of closure of the external unit installation position is that after the refrigeration operation is turned on, the air in the closed external unit installation position is blocked, and the air in the position will be continuously heated, causing the external ring temperature to rise. After running for a period of time, the heat dissipation of the external unit, the heat exchange between the closed external unit installation position and the external space reach a basic balance, and the external ring temperature will no longer rise after reaching a certain temperature, reaching a stable stage. At the same time, the more closed the external unit installation position is, the greater the corresponding external ring temperature rise will be, so the external ring temperature rise T can be used. 环温差 The size of T determines the degree of enclosure of the outdoor unit. 环温差 The larger it is, the more enclosed the outdoor unit installation location is.

[0112] The system determines the specified time t 变化 Inner and outer ring temperature change value t 变化 To determine whether the outer ring temperature is stable. 变化 <Preset judgment value T 外环判断 , the outer ring temperature is considered to be stable. This is the stable stage, and the real-time outer ring temperature is recorded as T 稳定 . Calculate the outer ring temperature rise T 环温差 =T 稳定 -T 开机 , and record the correction of function parameters such as self-cleaning of the external unit.

[0113] For example, setting t 变化 =1min, T 外环判断 =1℃, 开机 External ring temperature T 开机 =35℃, the system runs for about a minute, and the real-time external temperature T is recorded at the time of a minute. 外环(a) =45℃, record time a+1min, real-time T 外环(a+1) =45.5℃, i.e. from amin to a+1min, the outer ring temperature changes by t 变化 =45.5-(45)=0.5℃<T 外环判断 =1℃, it is considered to have entered the stable stage, and T 稳定 =T外环(a+1) =45.5℃. Calculate the startup time and the stable outer ring temperature rise T 环温差 =T 开机 -T 稳定 =45.5-(35)=10.5℃.

[0114] Step S102

[0115] According to T 环温差 , get the corresponding correction value in the corresponding assignment table, such as Figure 2 As shown, the external fan speed F in the condensation stage 凝露 Correction value C F凝露 and the outer loop closure degree judgment parameter T 环温差 is a mapping relationship. 环温差 ≤T1, the temperature rise of the outer ring is small, the machine position is relatively open, and the self-cleaning of the external machine is not affected by the machine position or is less affected, C F凝露 = 0, no actual correction effect is produced, as T 环温差 Improve, C F凝露 It also gradually increases until it reaches the maximum value C F凝露3 Because the more closed the machine position is, the outdoor unit needs to increase the speed of the outdoor fan to increase the air flow during the condensation stage, so that the air with higher humidity in the external environment can enter the machine position to ensure that the outdoor unit can condense enough condensation water.

[0116] As the external fan speed F 凝露 improvement.

[0117] The target external pipe temperature T needs to be lowered simultaneously 凝露 , to ensure the amount of condensed water. Figure 3 As shown, the target external pipe temperature T 凝露 and the outer ring temperature difference T 环温差 The corresponding relationship is divided into three intervals. The first interval, T 环温差 ≤T 环温差1 The external unit is less affected and no correction is required. C T凝露 =0; the second interval, T 环温差1 <T 环温差 ≤T 环温差2 , with T 环温差 Improve, C T凝露 is a negative number, and the value gradually decreases, that is, after correction, T 凝露 The third interval, T 环温差 >T 环温差3 , C T凝露 Reach the maximum value and be equal to C T凝露2 This area is mainly to avoid C T凝露 Overcorrection, the external tube temperature cannot be reduced to C T凝露 , resulting in the condensation phase being too long.

[0118] Similarly, the target operating time of the condensation phase also needs to be revised and extended. Figure 4 As shown, only C T凝露 ≤0, while the target time correction value C in the condensation stage T凝露 ≥0, and T 环温差 Is positively correlated.

[0119] The parameter correction method in the frosting stage is the same as that in the condensation stage and will not be repeated here.

[0120] Step 103

[0121] Entering the condensation stage, the outdoor fan is set to 凝露 At the same time, the external pipe temperature is lowered by controlling the internal fan speed and compressor speed until the real-time external pipe temperature reaches T 凝露 And maintain. The system starts timing until the running time t 凝露运行 =t 凝露 min, the condenser is fully watered and the condensation stage ends.

[0122] Step S104

[0123] Entering the frosting stage, the external fan stops running and the external pipe temperature further decreases until the real-time external pipe temperature reaches T 结霜 The system starts timing until the running time t 结霜运行 =t 结霜 min, the condenser is frosted enough and the condensation stage ends. It should be noted here that as the outdoor unit continues to frost, the external pipe temperature will not remain at T 结霜 , but continues to decrease until the frosting stage ends.

[0124] Step S105

[0125] When entering the defrost stage, the system stops running, the compressor and the internal fan are turned off, the frost layer of the external unit melts naturally, and the self-cleaning process of the external unit ends.

[0126] According to the above self-cleaning control method, the outdoor unit is in an open position, the temperature rise of the outer ring of the refrigeration operation is small, the correction parameters are all 0, and all self-cleaning parameters operate according to the preset standard parameters. If the outdoor unit is in a closed outdoor unit installation position, the temperature rise is large, and the standard operation parameters are corrected. As the degree of closure increases, the target external pipe temperature decreases, the speed of the external fan increases, and the stage operation time is extended. Ultimately, the self-cleaning effect of the outdoor unit in the closed outdoor unit installation position can be effectively improved. This control method can identify the closure of the outdoor unit position, correct the relevant parameters, and ensure the self-cleaning effect of the outdoor unit in different position states.

[0127] This embodiment can identify whether the outdoor unit is in a closed outdoor unit installation position, and correct the self-cleaning operation parameters to ensure the self-cleaning effect of the closed outdoor unit installation position. The main idea is to first determine the degree of closure of the outdoor unit position by the temperature rise of the outdoor unit ambient temperature before and after the refrigeration is turned on. Then, the operating conditions of the outdoor unit self-cleaning, such as the external pipe temperature, the external fan speed, and the operating time of each stage, are corrected, so that the self-cleaning parameters of the closed outdoor unit installation position are more accurate and the effect is better.

[0128] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0129] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0130] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0131] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0132] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air conditioner self-cleaning control method, characterized in that: include: When the air conditioner enters the outdoor unit self-cleaning mode, calculate the temperature change value T of the outdoor unit installation position before and after the air conditioner refrigeration operation 环温差 , according to T 环温差 Determine the sealing status of the outdoor unit installation position and correct the self-cleaning standard parameters of the air conditioner outdoor unit, T 环温差 The value of is positively correlated with the amplitude of the correction parameter, and the self-cleaning correction parameter is obtained. The self-cleaning correction parameter is used to operate the air conditioner self-cleaning mode.

2. The air conditioner self-cleaning control method according to claim 1, characterized in that: T 环温差 The calculation method is as follows: T 环温差 =T 稳定 -T 开机 , in, T 开机 The ambient temperature of the outdoor unit installation location when the air conditioner was last turned on for cooling; T 稳定 It is the stable ambient temperature of the outdoor unit installation location after the air conditioner last ran in cooling mode.

3. The air conditioner self-cleaning control method according to claim 2, characterized in that: The T 稳定 The way to obtain is as follows: At the preset time t 变化 Calculate the change in ambient temperature T at the installation location of the external unit 变化 , if T 变化 <T 设 , T 设 If the temperature is the preset value, the ambient temperature of the external unit installation location is considered stable and the real-time temperature is recorded as T 稳定 .

4. The air conditioner self-cleaning control method according to claim 1, characterized in that: The self-cleaning standard parameters include the external fan speed F in the self-cleaning condensation stage 凝露标准 , F 凝露标准 The correction method is as follows: F 凝露 =F 凝露标准 +C F凝露 , Among them, C F凝露 is the correction factor of the external fan speed, F 凝露 is the self-cleaning correction parameter of the external fan speed, When T 环温差 ≤T1, T1 is the preset value, C F凝露 =0; when T 环温差 >T1, with T 环温差 Increase, C F凝露 Gradually increase to the maximum value MAXC F凝露 .

5. The air conditioner self-cleaning control method according to claim 4, characterized in that: The self-cleaning standard parameters include the target external pipe temperature T in the self-cleaning condensation stage. 凝露标准， T 凝露标准 The corrections also include: T 凝露 =T 凝露标准 +C T凝露 , Among them, C T凝露 is the correction coefficient of the target external pipe temperature, T 凝露 is the self-cleaning correction parameter of the target external tube temperature, When T 环温差 ≤T1, T1 is the preset value, C T凝露 =0; when T 环温差 >T1,C T凝露 is negative, and as T 环温差 Increase, C T凝露 Gradually decrease until it reaches the minimum value MINC T凝露 .

6. The air conditioner self-cleaning control method according to claim 5, characterized in that: The self-cleaning standard parameters include the target running time t of the self-cleaning condensation stage 凝露标准 , t 凝露标准 The correction method is as follows: t 凝露 =t 凝露标准 +C t凝露 , Among them, C t凝露 is the correction factor for the target operating time in the condensation stage, t 凝露 is the self-cleaning correction parameter for the target run time, When T 环温差 ≤T1, T1 is the preset value, C t凝露 =0, when T 环温差 >T1, with T 环温差 Improve, C t凝露 Gradually increase until the maximum value MAXC is reached t凝露 .

7. The air conditioner self-cleaning control method according to claim 1, characterized in that: The self-cleaning standard parameters include the external fan speed F during the self-cleaning frosting stage. 结霜标准 , F 结霜标准 The correction method is as follows: F 结霜 =F 结霜标准 +C F结霜 , Among them, C F结霜 is the correction factor of the external fan speed, F 结霜 is the self-cleaning correction parameter of the external fan speed, When T 环温差 ≤T2, T2 is the preset value, C F结霜 =0; when T 环温差 >T2, with T 环温差 Increase, C F结霜 Gradually increase to the maximum value MAXC F结霜 .

8. The air conditioner self-cleaning control method according to claim 7, characterized in that: The self-cleaning standard parameters include the target outer tube temperature T in the self-cleaning frosting stage. 结霜标准， T 结霜标准 The corrections also include: T 结霜 =T 结霜标准 +C T结霜 , Among them, C T结霜 is the correction coefficient of the target external pipe temperature, T 结霜 is the self-cleaning correction parameter of the target external tube temperature, When T 环温差 ≤T2, T2 is the preset value, C T结霜 =0; when T 环温差 >T2, C T结霜 is negative, and as T 环温差 Increase, C T结霜 Gradually decrease until it reaches the minimum value MINC T结霜 .

9. The air conditioner self-cleaning control method according to claim 7, characterized in that: The self-cleaning standard parameters include the target running time t of the self-cleaning frosting stage 结霜标准 , t 结霜标准 The correction method is as follows: t 结霜 =t 结霜标准 +C t结霜 , Among them, C t结霜 is the correction factor for the target operating time in the frosting stage, t 结霜 is the self-cleaning correction parameter for the target run time, When T 环温差 ≤T2, T2 is the preset value, C t结霜 =0, when T 环温差 >T2, with T 环温差 Improve, C t结霜 Gradually increase until the maximum value MAXC is reached t结霜 .

10. The air conditioner self-cleaning control method according to claim 1, characterized in that: When entering the condensation stage, the speed of the external fan is F 凝露 , and at the same time control the internal fan speed and compressor speed to reduce the target external tube temperature until the real-time target external tube temperature reaches T 凝露 And keep it, start timing, and make the condensation stage run time t 凝露 .

11. The air conditioner self-cleaning control method according to claim 1, characterized in that: When entering the frosting stage, the external fan stops running, and the target external tube temperature is reduced to T 结霜 , start timing, and make the frosting stage run for time t 结霜。

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