A defrosting control method and device for an air conditioner, an air conditioner and a storage medium

Abstract

The application discloses a defrosting control method and device of an air conditioner, the air conditioner and a storage medium, and relates to the technical field of air conditioners. The method comprises the following steps: collecting the outdoor environment temperature, the outdoor environment humidity and the condenser temperature of the air conditioner in real time; calculating the average value of the difference between the outdoor environment temperature and the condenser tube temperature in a predetermined time period, and calculating the temperature change value of the condenser tube temperature in the predetermined time period; judging the frosting degree of the condenser according to the outdoor environment humidity and the average value of the difference; determining the maximum running time length of defrosting according to the frosting degree of the condenser; and controlling the outdoor fan according to the condenser temperature and the temperature change value, and regulating the defrosting process in combination with the maximum running time length of defrosting. According to the application, the defrosting progress is controlled according to the outdoor environment humidity, the difference between the outdoor environment temperature and the condenser tube temperature, the condenser tube temperature and the temperature change value of the condenser tube temperature, so that the defrosting efficiency of the condenser is improved.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the air conditioning technical field, and particularly relates to an air conditioner defrosting control method and device, an air conditioner and a storage medium. BACKGROUND

[0002] At present, in the heating process of the air conditioner, since the temperature of the outer pipe is lower than the temperature of the outdoor environment, the outdoor unit will be in the situation of condenser frosting after running for a period of time, and the situation of condenser frosting of the outdoor unit will be more and more serious with the increase of the running time of the heating. In order to ensure the heating effect of the air conditioner, the air conditioner will perform defrosting operation after running for a period of time, specifically, the temperature of the outer pipe is increased to melt the ice and frost on the condenser of the outdoor unit.

[0003] In the existing conventional defrosting method logic control, when defrosting in heating, the four-way valve is reversed, and the high-temperature and high-pressure refrigerant compressed by the compressor is introduced into the outdoor unit condenser for defrosting, and then the low-temperature and low-pressure refrigerant cooled and decompressed by the throttling system is introduced into the indoor evaporator, so that the refrigerant returns to the compressor to circulate the process. In the above conventional defrosting method, since the temperature of the refrigerant introduced into the indoor evaporator is low, although the indoor fan is stopped, the indoor heat will still be lost, which will cause the indoor temperature to gradually decrease, thereby affecting the user's comfort. Therefore, how to accurately control the defrosting progress and improve the efficiency of the outdoor unit in the conventional defrosting is a problem to be solved by those skilled in the art. SUMMARY

[0004] The embodiment of the present application provides an air conditioner defrosting control method, device, air conditioner and storage medium, which aims to solve the problem of indoor temperature reduction in the heating defrosting process and improve the comfort of using the air conditioner.

[0005] In a first aspect, the embodiment of the present application provides an air conditioner defrosting control method, comprising:

[0006] Real-time collection of the outdoor environment temperature, outdoor environment humidity and outdoor unit condenser temperature of the air conditioner;

[0007] Calculation of the average value of the difference between the outdoor environment temperature and the outdoor unit condenser pipe temperature in a predetermined time period, and calculation of the temperature change value of the outdoor unit condenser pipe temperature in the predetermined time period;

[0008] Judgment of the condensation degree of the outdoor unit condenser according to the outdoor environment humidity and the average value of the difference;

[0009] Determination of the maximum running time allowed for defrosting according to the condensation degree of the outdoor unit condenser;

[0010] Control of the outdoor fan according to the outdoor unit condenser temperature and the temperature change value, and regulation of the defrosting process in combination with the maximum running time allowed for defrosting.

[0011] In a second aspect, embodiments of the present invention provide an air conditioner defrosting device, comprising:

[0012] The data acquisition unit is used to collect the outdoor ambient temperature, outdoor ambient humidity, and outdoor unit condenser temperature of the air conditioner in real time.

[0013] The data calculation unit is used to calculate the average difference between the outdoor ambient temperature and the outdoor unit condenser tube temperature within a predetermined time period, as well as the temperature change value of the indoor and outdoor unit condenser tube temperature within the predetermined time period.

[0014] The degree judgment unit is used to judge the degree of frost on the outdoor unit condenser based on the outdoor ambient humidity and the average value of the difference;

[0015] The duration determination unit is used to determine the maximum allowable defrosting operating time based on the degree of frost formation on the outdoor unit's condenser.

[0016] The defrosting control unit is used to control the outdoor fan based on the outdoor unit condenser temperature and the temperature change value, and to regulate the defrosting process in conjunction with the maximum allowable defrosting operating time.

[0017] Thirdly, embodiments of the present invention provide an air conditioner, the air conditioner including a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the air conditioner defrosting control method as described in the first aspect.

[0018] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing a computer program that, when executed by a processor, can implement the air conditioner defrosting control method as described in the first aspect.

[0019] This invention provides a defrosting control method, device, air conditioner, and storage medium for an air conditioner. The method includes: real-time acquisition of outdoor ambient temperature, outdoor ambient humidity, and outdoor unit condenser temperature; calculation of the average difference between the outdoor ambient temperature and the outdoor unit condenser tube temperature over a predetermined time period, and calculation of the temperature change value of the outdoor unit condenser tube temperature over the predetermined time period; determination of the degree of frost formation on the outdoor unit condenser based on the outdoor ambient humidity and the average difference; determination of the maximum allowable defrosting operating time based on the degree of frost formation on the outdoor unit condenser; control of the outdoor fan based on the outdoor unit condenser temperature and the temperature change value, and regulation of the defrosting process in conjunction with the maximum allowable defrosting operating time. This invention uses outdoor ambient humidity, the difference between the outdoor ambient temperature and the outdoor unit condenser tube temperature, the outdoor unit condenser tube temperature, and the temperature change value of the outdoor unit condenser tube to determine and control the defrosting progress, thereby improving the control accuracy of the defrosting operation and thus improving the defrosting efficiency of the outdoor unit. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments description will be briefly introduced as follows. Obviously, the drawings in the embodiments description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0021] Figure 1 A flowchart of an air conditioner defrosting control method provided by the embodiments of the present application is shown in the figure.

[0022] Figure 2 A sub-flowchart of an air conditioner defrosting control method provided by the embodiments of the present application is shown in the figure.

[0023] Figure 3 Another sub-flowchart of an air conditioner defrosting control method provided by the embodiments of the present application is shown in the figure.

[0024] Figure 4 A schematic block diagram of an air conditioner defrosting control device provided by the embodiments of the present application is shown in the figure.

[0025] Figure 5 A sub-schematic block diagram of an air conditioner defrosting control device provided by the embodiments of the present application is shown in the figure.

[0026] Figure 6 Another sub-schematic block diagram of an air conditioner defrosting control device provided by the embodiments of the present application is shown in the figure.

[0027] Figure 7 A schematic block diagram of an air conditioner provided by the embodiments of the present application is shown in the figure. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0029] It should be understood that, when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0030] It should also be understood that the terms used herein are for the purpose of describing particular embodiments and are not intended to limit the application. As used in this specification and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0031] It should further be understood that the term "and / or" as used herein refers to any combination of one or more of the associated listed items, and all possible combinations, and includes these combinations.

[0032] As used in this specification and the appended claims, the term "if" can be interpreted as meaning "when" or "once" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [the described condition or event] is detected" can be interpreted as meaning "once it is determined" or "in response to determining" or "once [the described condition or event] is detected" or "in response to detecting [the described condition or event]", depending on the context.

[0033] Referring to Figure 1 , Figure 1 is a flowchart of a defrosting control method of an air conditioner provided by an embodiment of the application. As shown in Figure 1 , the method comprises the following steps S101-S105.

[0034] S101, collecting the outdoor environment temperature, outdoor environment humidity and outdoor unit condenser temperature of the air conditioner in real time;

[0035] S102, calculating the average value of the difference between the outdoor environment temperature and the outdoor unit condenser tube temperature in a predetermined time period, and calculating the temperature change value of the outdoor unit condenser tube temperature in the predetermined time period;

[0036] S103, judging the degree of frosting of the outdoor unit condenser according to the outdoor environment humidity and the average value of the difference;

[0037] S104, determining the maximum running time length of defrosting according to the degree of frosting of the outdoor unit condenser;

[0038] S105, controlling the outdoor fan according to the outdoor unit condenser temperature and the temperature change value, and regulating the defrosting process in combination with the maximum running time length of defrosting.

[0039] In the embodiment, when the defrosting operation is performed, firstly, the outdoor environment temperature, the outdoor environment humidity and the outdoor unit condenser temperature of the air conditioner are acquired, and then the average value of the difference between the outdoor environment temperature and the outdoor unit condenser temperature and the temperature change value of the outdoor unit condenser temperature are calculated. Then, the frosting degree of the outdoor unit condenser can be determined according to the calculated average value and the outdoor environment humidity, so that the maximum running time of the defrosting is determined according to the frosting degree. Then, the defrosting operation can be accurately controlled by combining the collected data and the maximum running time of the defrosting, so as to improve the defrosting efficiency of the outdoor unit and the experience of the user.

[0040] It should be noted that the defrosting operation of the outdoor unit is performed in the conventional defrosting mode in the embodiment, so as to melt the ice and frost on the condenser pipeline. When defrosting, the four-way valve is reversed, the high-temperature and high-pressure refrigerant compressed by the compressor is introduced into the outdoor unit condenser for defrosting, and then the low-temperature and low-pressure refrigerant cooled and decompressed by the throttling system is introduced into the indoor evaporator. The refrigerant returns to the compressor to circulate the process, and in the process, the compressor operates at a certain constant frequency (for example, 90 HZ, and of course, the constant frequency can also be other values). In addition, in the early stage of defrosting, the temperature of the outer ring is low, and the temperature of the outdoor unit condenser is also low when defrosting. If the outdoor fan is started, the heat exchange with the environment will be improved, and part of the heat of the high-temperature and high-pressure refrigerant will be lost in the outdoor environment, which is not conducive to melting the ice and frost on the condenser pipeline. Therefore, the outdoor fan is controlled to be stopped and not started. When the preset determination condition is reached (see below) after the defrosting runs for a period of time, the outdoor fan is controlled to meet the defrosting requirements of the embodiment, and the defrosting is ended after the outdoor fan runs for a period of time.

[0041] In an embodiment, as shown in FIG. 2, Figure 2 The step S102 includes steps S201-S203.

[0042] S201, calculating the temperature difference between the outdoor environment temperature and the outdoor unit condenser temperature;

[0043] S202, in a predetermined time period, the temperature difference at different time is counted, and the average value of all the temperature differences is calculated to obtain the average value of the difference;

[0044] S203, in a predetermined time period, the outdoor unit condenser temperature at the starting time and the outdoor unit condenser temperature at the ending time in each time interval are acquired according to the preset time interval, and then the temperature change value of the corresponding time interval is calculated according to the outdoor unit condenser temperature at the starting time and the ending time.

[0045] In the embodiment, firstly, the outdoor environment humidity RH 外环The outdoor ambient temperature is T. 室外环境 outdoor unit condenser tube temperature T 外管 Next, according to T 室外环境 and T 外管 The difference ΔT between the outdoor ambient temperature and the outdoor unit condenser tube temperature was calculated. 外 =T 室外环境 -T 外管 The average value of the difference between the outdoor ambient temperature and the outdoor unit condenser tube temperature over a certain period of time is ΔT. 外平均值 The change in temperature of the outdoor unit's condenser tubes is ΔT. 外管 .

[0046] For example, the average value ΔT of the difference between the outdoor ambient temperature and the outdoor unit condenser tube temperature within 10 minutes before the defrost logic is activated. 外平均值 For example, the defrosting logic is activated at 12:00, which calculates the average value ΔT of the difference between the outdoor ambient temperature and the outdoor unit condenser tube temperature during the period from 11:50 to 12:00. 外平均值 Calculate the change in temperature ΔT of the outdoor unit condenser tubes. 外管 The timing starts from the moment the compressor starts running, with a time interval of 15 seconds, meaning that ΔT is calculated cumulatively every 15 seconds. 外管 For example, if the compressor starts running at 12:00:30, then the cumulative calculation is 12:00:30 (at this moment T). 外管 From 1℃ to 12:00:45 (at this moment T) 外管 (2℃), 12:00:45 (at this moment T) 外管 From 2℃ to 12:01:00 (at this moment T) 外管 The change in outdoor unit condenser tube temperature ΔT every 15 seconds (5℃)... 外管 The temperatures are 1℃, 3℃, and so on.

[0047] In one embodiment, step S103 includes:

[0048] The outdoor ambient humidity is compared with a preset ratio; wherein the preset ratio includes a first preset ratio, a second preset ratio, and a third preset ratio.

[0049] When the outdoor ambient humidity is greater than the first preset ratio, the degree of frost on the outdoor unit condenser is determined to be level one;

[0050] When the outdoor ambient humidity is less than or equal to the first preset ratio and greater than the second preset ratio, the degree of frost on the outdoor unit condenser is determined to be the second level.

[0051] When the outdoor ambient humidity is less than or equal to the second preset ratio and greater than the third preset ratio, the degree of frost on the outdoor unit condenser is determined to be level three.

[0052] When the outdoor environment humidity is less than or equal to a third preset proportion, it is determined that the frost degree of the outdoor unit condenser is a fourth level;

[0053] The numerical values of the first preset proportion, the second preset proportion and the third preset proportion decrease in turn, and the frost degrees of the first level, the second level, the third level and the fourth level decrease in turn.

[0054] In the embodiment, considering that the higher the outdoor environment humidity is, the more serious the frost of the outdoor unit condenser is, the outdoor environment humidity RH 外环 is compared with preset proportion numerical values to obtain a more accurate frost degree determination result.

[0055] In specific embodiments, the first preset proportion, the second preset proportion and the third preset proportion are percentage numerical values, for example, 90%, 75% and 60% in turn, so that the outdoor environment humidity RH 外环 is compared with the preset proportion as follows:

[0056] ① When 90% < RH 外环 , this case is recorded as condition A, that is, the frost degree is the first level;

[0057] ② When 75% < RH 外环 ≤ 90%, this case is recorded as condition B, that is, the frost degree is the second level;

[0058] ③ When 60% < RH 外环 ≤ 75%, this case is recorded as condition C, that is, the frost degree is the third level;

[0059] ④ When RH 外环 ≤ 60%, this case is recorded as condition D, that is, the frost degree is the fourth level.

[0060] Of course, in other embodiments, other proportion numerical values can be used for comparison, and the number of comparisons can be more, so that the determination result is more accurate.

[0061] In another embodiment, the step S103 further includes:

[0062] comparing the average value of the difference with preset temperature thresholds; wherein the preset temperature thresholds include a first preset temperature threshold, a second preset temperature threshold and a third preset temperature threshold;

[0063] When the average value of the difference is greater than the first preset temperature threshold, it is determined that the frost degree of the outdoor unit condenser is a fifth level;

[0064] determining that the frosting degree of the outdoor condenser is the sixth level when the average difference value is less than or equal to the first preset temperature threshold and greater than the second preset temperature threshold;

[0065] determining that the frosting degree of the outdoor condenser is the seventh level when the average difference value is less than or equal to the second preset temperature threshold and greater than the third preset temperature threshold;

[0066] The first preset temperature threshold, the second preset temperature threshold and the third preset temperature threshold are in turn decreased, and the frosting degrees of the fifth level, the sixth level and the seventh level are in turn decreased.

[0067] Since the air conditioner is in the heating mode before defrosting, the temperature of the outdoor condenser pipe is necessarily lower than the outdoor environment temperature, so it can be determined that ΔT 外平均值 is greater than 0℃, and ΔT 外平均值 is greater, the temperature of the outdoor condenser pipe before starting the defrosting logic is lower than the outdoor environment temperature, and the frosting is more serious, so the embodiment compares ΔT 外平均值 with preset temperature thresholds to obtain a more accurate frosting degree determination result.

[0068] In specific embodiments, the values of the first preset temperature threshold, the second preset temperature threshold and the third preset temperature threshold are in turn 6℃, 3℃ and 0℃, so the comparison process of ΔT 外平均值 with the preset temperature thresholds is as follows:

[0069] ① When 6℃ < ΔT 外平均值 , record this case as condition 1, that is, the frosting degree is the fifth level;

[0070] ② When 3℃ < ΔT 外平均值 ≤ 6℃, record this case as condition 2, that is, the frosting degree is the sixth level;

[0071] ③ When 0℃ < ΔT 外平均值 ≤ 3℃, record this case as condition 3, that is, the frosting degree is the seventh level.

[0072] Here, it should be noted that the fifth level, the sixth level and the seventh level described in the embodiment are not directly related to the first level, the second level, the third level and the fourth level described above. Similarly, the first preset temperature threshold, the second preset temperature threshold and the third preset temperature threshold are not directly related to the fourth preset temperature threshold and the fifth preset temperature threshold described below.

[0073] In an embodiment, as shown in Figure 3 , the step S104 includes steps S301-S303.

[0074] S301, set the defrosting allowed maximum running time corresponding to the frosting degree of the first, second, third and fourth levels to decrease in turn; and set the defrosting allowed maximum running time corresponding to the frosting degree of the fifth, sixth and seventh levels to decrease in turn;

[0075] S302, in the current defrosting operation, obtain the first outdoor unit condenser frosting degree corresponding to the outdoor environment humidity, and the second outdoor unit condenser frosting degree corresponding to the average value of the difference;

[0076] S303, add the first sub-defrosting allowed maximum running time corresponding to the first outdoor unit condenser frosting degree and the second sub-defrosting allowed maximum running time corresponding to the second outdoor unit condenser frosting degree to obtain the defrosting allowed maximum running time of the current defrosting operation.

[0077] In this embodiment, the frosting degree of the first, second, third and fourth levels (i.e. the first outdoor unit condenser frosting degree) is combined with the frosting degree of the fifth, sixth and seventh levels (i.e. the second outdoor unit condenser frosting degree) to determine the defrosting allowed maximum running time. In a specific application scenario, the two can be combined according to Table 1 below to obtain the defrosting allowed maximum running time:

[0078]

[0079] Table 1

[0080] As can be seen from Table 1, the first sub-defrosting allowed maximum running time corresponding to the frosting degree (A) of the first level is 8 min, the second sub-defrosting allowed maximum running time corresponding to the frosting degree (1) of the fifth level is 1.5 min, so the defrosting allowed maximum running time t0 obtained after the combination of the two is 9.5 min. For example, the first sub-defrosting allowed maximum running time corresponding to the frosting degree (C) of the third level is 6 min, the second sub-defrosting allowed maximum running time corresponding to the frosting degree (3) of the seventh level is 0 min, so the defrosting allowed maximum running time t0 obtained after the combination of the two is 6 min.

[0081] In an embodiment, the step S105 comprises:

[0082] determine whether the outdoor unit condenser temperature reaches a fourth preset temperature threshold value, and determine whether the temperature change value reaches a fifth preset temperature threshold value;

[0083] If the outdoor unit condenser temperature reaches the fourth preset temperature threshold value and / or the temperature change value reaches the fifth preset temperature threshold value, the outer fan is controlled to start reverse rotation, and the defrosting operation is continued.

[0084] In this embodiment, according to the outdoor unit condenser temperature T外管 and the temperature variation value ΔT of the outdoor unit condenser pipe 外管 to control the operation of the outdoor fan. Specifically, when ΔT 外管 ≥ 3℃ or T 外管 ≥ 10℃, the outdoor fan is started to run reversely for a period of time to blow off the frost and ice on the condenser pipe. Here, 3℃ is the fourth preset temperature threshold and 10℃ is the fifth preset temperature threshold, both of which are only exemplary values to indicate that the temperature of the outdoor unit condenser pipe is high and increases rapidly at this moment, i.e., most of the frost on the outdoor unit condenser has melted and the frost is thin. Starting the outdoor fan can accelerate the defrosting, and the speed and running time of the outdoor fan are not limited in the embodiment. Here, when the outdoor fan runs forwardly, air enters from the back and sides of the air conditioner and is blown out from the front; when the outdoor fan runs reversely, air enters from the front and is blown out from the back and sides of the air conditioner.

[0085] In another embodiment, the step S105 further comprises:

[0086] determining whether the temperature of the outdoor unit condenser reaches a sixth preset temperature threshold and determining whether the running time of the defrosting operation of the outdoor fan reaches a maximum allowed running time of defrosting; wherein the sixth preset temperature threshold is greater than the fourth preset temperature threshold;

[0087] If the temperature of the outdoor unit condenser reaches the sixth preset temperature threshold and / or the running time of the defrosting operation of the outdoor fan reaches the maximum allowed running time of defrosting, the current defrosting operation is ended.

[0088] In the embodiment, when the defrosting operation is performed by controlling the operation of the outdoor fan, whether to stop the defrosting operation is further determined by the temperature T 外管 of the outdoor unit condenser and the maximum allowed running time t0 of defrosting. Specifically, when T 外管 ≥ 14℃ or the running time t of defrosting ≥ the maximum allowed running time t0 of defrosting, the defrosting is ended. It can be understood that 14℃ here is the sixth preset temperature threshold, which is also only an exemplary value and the actual value is not limited in the embodiment.

[0089] Figure 4 A schematic block diagram of a defrosting device 400 of an air conditioner according to an embodiment of the present application is provided, and the device 400 comprises:

[0090] a data acquisition unit 401 configured to acquire the outdoor environment temperature, the outdoor environment humidity and the temperature of the outdoor unit condenser of the air conditioner in real time;

[0091] The data calculation unit 402 is configured to calculate an average value of a difference between an outdoor ambient temperature and an outdoor unit condenser pipe temperature in a predetermined time period, and calculate a temperature change value of the outdoor unit condenser pipe temperature in the predetermined time period.

[0092] The degree judgment unit 403 is configured to judge a condenser frosting degree of the outdoor unit condenser according to the outdoor ambient humidity and the average value of the difference.

[0093] The time length determination unit 404 is configured to determine a maximum frosting allowable running time length of the condenser defrosting according to the condenser frosting degree of the outdoor unit condenser.

[0094] The defrosting regulation unit 405 is configured to control an outdoor fan according to the outdoor unit condenser temperature and the temperature change value, and regulate a defrosting process in combination with the maximum frosting allowable running time length.

[0095] In an embodiment, as shown in Figure 5 the data calculation unit 402 comprises:

[0096] The difference calculation unit 501 is configured to calculate a temperature difference between an outdoor ambient temperature and an outdoor unit condenser temperature.

[0097] The average value calculation unit 502 is configured to calculate an average value of the temperature difference in a predetermined time period.

[0098] The change value calculation unit 503 is configured to obtain the outdoor unit condenser pipe temperature at a starting time and the outdoor unit condenser pipe temperature at an ending time in each time interval in the predetermined time period according to a preset time interval, and then calculate the temperature change value of the corresponding time interval according to the outdoor unit condenser pipe temperature at the starting time and the ending time.

[0099] In an embodiment, the degree judgment unit 403 comprises:

[0100] The first comparison unit is configured to compare the outdoor ambient humidity with a preset ratio, wherein the preset ratio comprises a first preset ratio, a second preset ratio and a third preset ratio.

[0101] The first level determination unit is configured to determine that the condenser frosting degree of the outdoor unit condenser is a first level when the outdoor ambient humidity is greater than the first preset ratio.

[0102] The second level determination unit is configured to determine that the condenser frosting degree of the outdoor unit condenser is a second level when the outdoor ambient humidity is less than or equal to the first preset ratio and greater than the second preset ratio.

[0103] The three-level determination unit is used to determine the degree of frost on the outdoor unit condenser as level three when the outdoor ambient humidity is less than or equal to the second preset ratio and greater than the third preset ratio.

[0104] The fourth-level determination unit is used to determine the degree of frost on the outdoor unit condenser as the fourth level when the outdoor ambient humidity is less than or equal to the third preset ratio.

[0105] Among them, the values ​​of the first preset ratio, the second preset ratio and the third preset ratio decrease in sequence, and the degree of frosting of the first level, the second level, the third level and the fourth level decreases in sequence.

[0106] In one embodiment, the degree determination unit 403 further includes:

[0107] The second comparison unit is used to compare the average difference with a preset temperature threshold; wherein the preset temperature threshold includes a first preset temperature threshold, a second preset temperature threshold, and a third preset temperature threshold.

[0108] A five-level determination unit is used to determine the degree of frost on the outdoor unit condenser as level five when the average difference value is greater than the first preset temperature threshold.

[0109] The sixth-level determination unit is used to determine the degree of frost on the outdoor unit condenser as the sixth level when the average difference is less than or equal to the first preset temperature threshold and greater than the second preset temperature threshold.

[0110] The seventh-level determination unit is used to determine the degree of frost on the outdoor unit condenser as the seventh level when the average difference is less than or equal to the second preset temperature threshold and greater than the third preset temperature threshold.

[0111] Among them, the values ​​of the first preset temperature threshold, the second preset temperature threshold and the third preset temperature threshold decrease in sequence, and the degree of frosting at the fifth level, the sixth level and the seventh level decrease in sequence.

[0112] In one embodiment, such as Figure 6 As shown, the duration determination unit 404 includes:

[0113] The duration setting unit 601 is used to set the maximum allowable defrosting time corresponding to the first, second, third and fourth levels of frosting, which decreases sequentially; and to set the maximum allowable defrosting time corresponding to the fifth, sixth and seventh levels of frosting, which decreases sequentially.

[0114] The degree acquisition unit 602 is used to acquire, during the current defrosting operation, the degree of frost on the first outdoor unit condenser corresponding to the outdoor ambient humidity, and the degree of frost on the second outdoor unit condenser corresponding to the average difference value;

[0115] The time length adding unit 603 is configured to add the first sub-defrosting allowed maximum running time length corresponding to the first outdoor unit condenser frosting degree and the second sub-defrosting allowed maximum running time length corresponding to the second outdoor unit condenser frosting degree, to obtain a defrosting allowed maximum running time length of the current defrosting operation.

[0116] In an embodiment, the defrosting regulation unit 405 comprises:

[0117] The first judging unit is configured to judge whether the outdoor unit condenser temperature reaches a fourth preset temperature threshold value and whether the temperature change value reaches a fifth preset temperature threshold value.

[0118] The outdoor unit control unit is configured to control the outdoor fan to start reverse rotation and continue the defrosting operation if the outdoor unit condenser temperature reaches the fourth preset temperature threshold value and / or the temperature change value reaches the fifth preset temperature threshold value.

[0119] In an embodiment, the defrosting regulation unit 405 further comprises:

[0120] The second judging unit is configured to judge whether the outdoor unit condenser temperature reaches a sixth preset temperature threshold value and whether the running time of the outdoor fan defrosting operation reaches a defrosting allowed maximum running time length; wherein the sixth preset temperature threshold value is greater than the fourth preset temperature threshold value.

[0121] The defrosting ending unit is configured to end the current defrosting operation if the outdoor unit condenser temperature reaches the sixth preset temperature threshold value and / or the running time of the outdoor fan defrosting operation reaches the defrosting allowed maximum running time length.

[0122] The above air conditioner defrosting device can be implemented in the form of a computer program, which can run on an air conditioner as shown in Figure 7 Since the embodiments of the device part correspond to the embodiments of the method part, the embodiments of the device part are described in the description of the embodiments of the method part, which are not described here.

[0123] Please refer to Figure 7 , Figure 7 is a schematic block diagram of an air conditioner provided by an embodiment of the present application. The air conditioner 700 comprises a processor 702, a memory and a network interface 705 connected through a system bus 701, wherein the memory can comprise a non-volatile storage medium 703 and an internal memory 704.

[0124] The non-volatile storage medium 703 can store an operating system 7031 and a computer program 7032. The computer program 7032, when executed, can cause the processor 702 to perform an air conditioner defrosting control method.

[0125] The processor 702 is configured to provide computing and control capabilities to support the operation of the entire air conditioner 700.

[0126] The internal memory 704 provides an environment for the operation of the computer program 7032 in the non-volatile storage medium 703, which, when executed by the processor 702, causes the processor 702 to perform an air conditioner defrosting control method.

[0127] The network interface 705 is configured to perform network communication with other devices. Those skilled in the art can understand that, Figure 7 The structure shown in FIG. 7 is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the air conditioner 700 to which the scheme of the present application is applied. Specifically, the air conditioner 700 can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0128] The processor 702 is configured to execute the computer program 7032 stored in the memory to implement any of the embodiments of the air conditioner defrosting control method described above.

[0129] It should be understood that, in the embodiments of the present application, the processor 702 can be a central processing unit (CPU), and the processor 702 can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0130] Those of ordinary skill in the art can understand that all or part of the processes in the above-described embodiments can be completed by a computer program instructing related hardware. The computer program can be stored in a storage medium, which is a computer-readable storage medium. The computer program is executed by at least one processor in the computer system to implement the process steps of the above-described embodiments.

[0131] Therefore, the present application also provides a storage medium. The storage medium can be a computer-readable storage medium. The storage medium stores a computer program. The computer program, when executed by a processor, causes the processor to execute any of the above-described air conditioner defrosting control methods.

[0132] The storage medium can be a U disk, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk, and the like various computer readable storage media that can store program codes.

[0133] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been described in the above description in a general manner. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0134] In several embodiments provided by the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of each unit is only a logical function division, and actual implementation can have another division manner. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0135] The steps in the method embodiments of the present application can be adjusted, combined and deleted in sequence according to actual needs. The units in the device embodiments of the present application can be combined, divided and deleted according to actual needs. In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0136] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a storage medium. Based on such understanding, the technical solutions of the present application essentially or say the parts that make contributions to the prior art, or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing an air conditioner to execute all or part of the steps of the method described in each embodiment of the present application.

[0137] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0138] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

[0139] The above description is merely that of the preferred embodiments of the application, but the protection scope of the application is not limited to this. Any modification or replacement within the technical range disclosed by the application can be easily thought of by those skilled in the art, and these modifications or replacements should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. An air conditioner defrosting control method, characterized by, The method comprises the following steps: collecting outdoor environment temperature, outdoor environment humidity and outdoor condenser temperature of an air conditioner in real time; calculating the average value of the difference between the outdoor environment temperature and the outdoor condenser tube temperature in a predetermined time period, and calculating the temperature change value of the outdoor condenser tube temperature in the predetermined time period; judging the frosting degree of the outdoor condenser according to the outdoor environment humidity and the average value of the difference; determining the maximum frosting operation time according to the frosting degree of the outdoor condenser; controlling the outdoor fan according to the outdoor condenser temperature and the temperature change value, and adjusting the frosting process in combination with the maximum frosting operation time.

2. The defrost control method of claim 1, wherein, The method of calculating the average value of the difference between the outdoor environment temperature and the outdoor condenser tube temperature in a predetermined time period, and calculating the temperature change value of the outdoor condenser tube temperature in the predetermined time period comprises the following steps: calculating the temperature difference between the outdoor environment temperature and the outdoor condenser temperature; in a predetermined time period, counting the temperature difference at different time points, and calculating the average value of all the temperature differences to obtain the average value of the difference; in a predetermined time period, obtaining the outdoor condenser tube temperature at the starting time and the outdoor condenser tube temperature at the ending time in each time interval according to the preset time interval, and then calculating the temperature change value of the corresponding time interval according to the outdoor condenser tube temperature at the starting time and the ending time.

3. The defrost control method of claim 1, wherein, The method of judging the frosting degree of the outdoor condenser according to the outdoor environment humidity and the average value of the difference comprises the following steps: comparing the outdoor environment humidity with a preset proportion; wherein the preset proportion comprises a first preset proportion, a second preset proportion and a third preset proportion; when the outdoor environment humidity is greater than the first preset proportion, determining that the frosting degree of the outdoor condenser is the first level; when the outdoor environment humidity is less than or equal to the first preset proportion and greater than the second preset proportion, determining that the frosting degree of the outdoor condenser is the second level; when the outdoor environment humidity is less than or equal to the second preset proportion and greater than the third preset proportion, determining that the frosting degree of the outdoor condenser is the third level; when the outdoor environment humidity is less than or equal to the third preset proportion, determining that the frosting degree of the outdoor condenser is the fourth level; wherein the numerical values of the first preset proportion, the second preset proportion and the third preset proportion decrease in turn, and the frosting degrees of the first level, the second level, the third level and the fourth level decrease in turn.

4. The defrost control method of claim 3, wherein, The method of judging the frosting degree of the outdoor condenser according to the outdoor environment humidity and the average value of the difference further comprises the following steps: comparing the average value of the difference with a preset temperature threshold; wherein the preset temperature threshold comprises a first preset temperature threshold, a second preset temperature threshold and a third preset temperature threshold; when the average value of the difference is greater than the first preset temperature threshold, determining that the frosting degree of the outdoor condenser is the fifth level; when the average value of the difference is less than or equal to the first preset temperature threshold and greater than the second preset temperature threshold, determining that the frosting degree of the outdoor condenser is the sixth level; when the average value of the difference is less than or equal to the second preset temperature threshold and greater than the third preset temperature threshold, determining that the frosting degree of the outdoor condenser is the seventh level; The first preset temperature threshold, the second preset temperature threshold and the third preset temperature threshold are in order of decreasing values, and the frost degrees of the fifth level, the sixth level and the seventh level are in order of decreasing degrees.

5. The defrost control method of claim 4, wherein, The frost allowing maximum running time length determined by the frost degree of the outdoor unit condenser comprises: The frost allowing maximum running time length corresponding to the frost degrees of the first level, the second level, the third level and the fourth level is in order of decreasing values, and the frost allowing maximum running time length corresponding to the frost degrees of the fifth level, the sixth level and the seventh level is in order of decreasing values; In the current defrosting operation, the first outdoor unit condenser frost degree corresponding to the outdoor environment humidity is obtained, and the second outdoor unit condenser frost degree corresponding to the average value of the difference is obtained; The first sub-defrosting allowing maximum running time length corresponding to the first outdoor unit condenser frost degree is added to the second sub-defrosting allowing maximum running time length corresponding to the second outdoor unit condenser frost degree, to obtain the defrosting allowing maximum running time length of the current defrosting operation.

6. The air conditioner defrosting control method of claim 1, wherein, The outdoor fan is controlled according to the outdoor unit condenser temperature and the temperature change value, and the defrosting process is regulated in combination with the defrosting allowing maximum running time length, which comprises: It is judged whether the outdoor unit condenser temperature reaches a fourth preset temperature threshold and whether the temperature change value reaches a fifth preset temperature threshold; If the outdoor unit condenser temperature reaches the fourth preset temperature threshold and / or the temperature change value reaches the fifth preset temperature threshold, the outdoor fan is controlled to start reverse rotation, and the defrosting operation is continued.

7. The defrost control method of claim 6, wherein, The outdoor fan is controlled according to the outdoor unit condenser temperature and the temperature change value, and the defrosting process is regulated in combination with the defrosting allowing maximum running time length, which further comprises: It is judged whether the outdoor unit condenser temperature reaches a sixth preset temperature threshold and whether the running time of the outdoor fan defrosting operation reaches the defrosting allowing maximum running time length; wherein the sixth preset temperature threshold is greater than the fourth preset temperature threshold; If the outdoor unit condenser temperature reaches the sixth preset temperature threshold and / or the running time of the outdoor fan defrosting operation reaches the defrosting allowing maximum running time length, the current defrosting operation is ended.

8. An air conditioner defrosting device characterized by comprising: It comprises: A data acquisition unit is configured to acquire the outdoor environment temperature, the outdoor environment humidity and the outdoor unit condenser temperature of the air conditioner in real time; A data calculation unit is configured to calculate the average value of the difference between the outdoor environment temperature and the outdoor unit condenser temperature in a predetermined time period, and calculate the temperature change value of the outdoor unit condenser temperature in the predetermined time period; A degree judgment unit is configured to judge the outdoor unit condenser frost degree according to the outdoor environment humidity and the average value of the difference; A time length determination unit is configured to determine the defrosting allowing maximum running time length according to the outdoor unit condenser frost degree; A defrosting regulation unit is configured to control the outdoor fan according to the outdoor unit condenser temperature and the temperature change value, and regulate the defrosting process in combination with the defrosting allowing maximum running time length.

9. An air conditioner characterized by comprising: The air conditioner comprises a memory and a processor, the memory stores a computer program, and the processor executes the computer program to realize the defrosting control method of the air conditioner according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, and the computer program can implement the defrosting control method of the air conditioner according to any one of claims 1-7 when executed by the processor.

Images