A control method for dust removal of a heat exchanger of an air conditioner outdoor unit

Abstract

The application discloses a control method for dust removal of a heat exchanger of an outdoor unit of an air conditioner, relates to the technical field of air conditioners, and can realize automatic dust removal, improve air conditioner comfort, and reduce air conditioner power consumption and save electricity charges. The control method comprises the following steps: setting the accumulated operation time length of the air conditioner as T, setting the accumulated operation time length required for dust removal of the outdoor unit of the air conditioner as Tset, obtaining the accumulated operation time length T of the air conditioner and environment data by a controller after the air conditioner is started by a user, starting the air conditioner outdoor unit to reverse and remove dust when T is greater than or equal to Tset and the environment data meets the dust removal condition, and normally operating the air conditioner to perform refrigeration or heating after the dust removal is completed. The method realizes the timed dust removal of the outdoor unit of the air conditioner, improves the air conditioner comfort, reduces the air conditioner power consumption, and saves electricity charges.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a control method for dust removal of a heat exchanger of an outdoor unit of an air conditioner. BACKGROUND

[0002] Split air conditioners have a large market share in the domestic air conditioning market. Since the outdoor unit is placed outdoors, dust in the air will inevitably adhere to it. When the accumulation reaches a certain level, the heat exchange efficiency of the outdoor heat exchanger will decrease, and the capacity of the air conditioner will decrease, resulting in the user finding that the air conditioner does not cool after using it for a period of time, causing user complaints. Although many air conditioners have an outdoor unit self-cleaning function, it needs to be operated by the user, and many users do not read the instruction manual or are old, and do not know how to operate or even do not know that such a function exists. SUMMARY

[0003] The present application aims to at least solve one of the problems in the prior art, and provides a control method for dust removal of a heat exchanger of an outdoor unit of an air conditioner, which can automatically remove dust, improve air conditioning comfort, and reduce air conditioning power consumption and save electricity.

[0004] The present application provides a control method for dust removal of a heat exchanger of an outdoor unit of an air conditioner, comprising the following steps: setting the cumulative running time of the air conditioner as T, and setting the cumulative running time of the outdoor unit of the air conditioner required for dust removal as Tset; when the user turns on the air conditioner, the controller obtains the cumulative running time T of the air conditioner and environmental data; when T≥Tset and the environmental data meets the dust removal condition, the air conditioner fan is first reversed to remove dust, and after the dust removal is completed, the air conditioner is normally operated to cool or heat.

[0005] According to the control method for dust removal of a heat exchanger of an outdoor unit of an air conditioner of the present application, at least the following advantages are achieved: the controller controls the air conditioner fan to reverse and remove dust when the environment and the cumulative running time meet the dust removal condition, which reduces the dust accumulation of the outdoor unit of the air conditioner, reduces the power consumption of the air conditioner, and saves electricity.

[0006] According to the control method for dust removal of a heat exchanger of an outdoor unit of an air conditioner, in the step of obtaining environmental data by the controller, the air conditioner is connected to the Internet through the WiFi module to obtain the local weather condition. When the weather is not rain or snow, dust removal is allowed.

[0007] According to the control method for dust removal of a heat exchanger of an outdoor unit of an air conditioner, after the outdoor unit of the air conditioner is reversed to remove dust, the cumulative running time T is reset to zero and is accumulated again after the reverse dust removal.

[0008] The control method for dust removal of the heat exchanger of the outdoor unit of the air conditioner according to the application sets the first dust removal time length as S1, sets a time constant X, calculates the nth dust removal time length Sn according to the first dust removal time length S1 and the time constant X, and the calculation method is Sn=S1+(n-1)*X, wherein n is the number of times of dust removal.

[0009] The control method for dust removal of the heat exchanger of the outdoor unit of the air conditioner according to the application sets the first dust removal time length as S1, sets a time constant X, calculates the nth dust removal time length Sn according to the first dust removal time length S1 and the time constant X, and the calculation method is Sn=S1+(n-1)*X, wherein n is the number of times of dust removal.

[0010] The control method for dust removal of the heat exchanger of the outdoor unit of the air conditioner according to the application sets the first dust removal time length as S1, sets a time constant X, calculates the nth dust removal time length Sn according to the first dust removal time length S1 and the time constant X, and the calculation method is Sn=S1+(n-1)*X, wherein n is the number of times of dust removal.

[0011] The control method for dust removal of the heat exchanger of the outdoor unit of the air conditioner according to the application sets the first dust removal time length as S1, sets a time constant X, calculates the nth dust removal time length Sn according to the first dust removal time length S1 and the time constant X, and the calculation method is Sn=S1+(n-1)*X, wherein n is the number of times of dust removal.

[0012] The control method for dust removal of the heat exchanger of the outdoor unit of the air conditioner according to the application sets the first dust removal time length as S1, sets a time constant X, calculates the nth dust removal time length Sn according to the first dust removal time length S1 and the time constant X, and the calculation method is Sn=S1+(n-1)*X, wherein n is the number of times of dust removal.

[0013] The control method for dust removal of the heat exchanger of the outdoor unit of the air conditioner according to the application sets the first dust removal time length as S1, sets a time constant X, calculates the nth dust removal time length Sn according to the first dust removal time length S1 and the time constant X, and the calculation method is Sn=S1+(n-1)*X, wherein n is the number of times of dust removal.

[0014] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0015] The application will be further described below with reference to the drawings and embodiments.

[0016] Figure 1 The control flow chart of the preferred embodiment of the application. DETAILED DESCRIPTION

[0017] This part will describe the specific embodiments of the application in detail, the preferred embodiments of the application are shown in the drawings, the role of the drawings is to supplement the description of the text part with figures, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the application, but it cannot be understood as a limitation on the protection scope of the application.

[0018] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by the upper, lower, front, rear, left, right and the like, is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0019] In the description of the present application, one or more is understood as one or more, and more than two is understood as more than two, greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0020] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0021] Reference Figure 1 A control method for dust removal of a heat exchanger of an air conditioner outdoor unit includes the following steps:

[0022] The cumulative running time of the air conditioner is set as T, and the cumulative running time of the air conditioner outdoor unit required for dust removal is set as Tset. When the user starts the air conditioner, the controller obtains the cumulative running time T of the air conditioner and environmental data. When T≥Tset and the environmental data meets the dust removal condition, the air conditioner outdoor unit is first started in reverse to remove dust. After dust removal, the air conditioner operates normally for cooling or heating.

[0023] It can be understood that the working process of the present application is as follows: the cumulative running time T is recorded from the first operation of the air conditioner after installation. When the air conditioner is started after a period of operation, it is detected that T is greater than or equal to the preset cumulative running time Tset required for dust removal, and at the same time the environmental condition meets the dust removal requirement, then the fan of the air conditioner outdoor unit heat exchanger is first reversed to operate for dust removal, and then normal cooling or heating is performed after the dust removal is completed. The air conditioner outdoor unit is regularly cleaned, which improves the comfort of the air conditioner and reduces the power consumption of the air conditioner, thereby saving electricity.

[0024] It should be noted that the cumulative running time of the air conditioner outdoor unit required for dust removal is Tset, and the value of Tset is set by those skilled in the art according to the dust accumulation condition.

[0025] Reference Figure 1In the controller obtaining environment data step, the WiFi module of the air conditioner is connected to the network to obtain the local weather condition, and dust removal is allowed when the weather is not rain or snow.

[0026] It should be noted that the weather suitable for dust removal is sunny, cloudy and the like, and dust removal is not suitable in snowy and rainy days, because water droplets are suspended on the outdoor heat exchanger or dust is adsorbed on the copper pipe and fin, and the dust removal effect of the fan is poor.

[0027] Therefore, when the air conditioner is started, the WiFi module of the air conditioner is connected to the network to obtain the local weather condition, and the control panel of the air conditioner records the use time of the air conditioner, and when the dust removal condition is met, the fan of the outdoor unit is reversed to blow away the dust on the outdoor heat exchanger, thereby protecting the outdoor heat exchanger.

[0028] Referring to Figure 1 , the cumulative running time T is reset to zero after the air conditioner outdoor unit is reversed for dust removal, and the cumulative running time is restarted after the dust removal.

[0029] It can be understood that in the embodiments of the present application, the cumulative running time T is reset to zero after each reverse dust removal, and the cumulative running time is restarted, so as to avoid the first T≥Tset, and the subsequent each start is dust removal.

[0030] Referring to Figure 1 , the installation time of the air conditioner outdoor unit is different, and the dust accumulation degree on the heat exchanger of the air conditioner outdoor unit is different, and the first dust removal time S1 is set for different air conditioner installation time, and the time constant X is set, the nth dust removal time Sn is calculated according to the first dust removal time S1 and the time constant X, and the calculation method is Sn=S1+(n-1)*X, wherein n is the number of dust removal.

[0031] It can be understood that after each reverse dust removal, the dust cannot be completely removed, and part of the dust still remains, so as to achieve the same dust removal effect, the dust removal time needs to be longer with the increase of the number of dust removal, therefore, the dust removal time Sn gradually increases each time, and the increased value is the unit time constant X set by the person skilled in the art according to the need.

[0032] It should be noted that the data of the first dust removal time S1 is set by the person skilled in the art according to the need, and in some embodiments of the present application, S1 is 20 seconds, 25 seconds or 30 seconds and the like.

[0033] It should be noted that in some embodiments of the present application, when calculating the dust removal time Sn, the value of X is X≥2 seconds.

[0034] As a further improvement of the above scheme, the installation time of the air conditioner outdoor unit will be different, and the degree of dust accumulation on the heat exchanger of the air conditioner outdoor unit will be different. For different installation time of the air conditioner, the motor speed V1 is set for the first time of dust removal, the speed constant Y is set, the motor speed Vn for the nth time of dust removal is calculated according to the motor speed V1 for the first time of dust removal and the speed constant Y, and the calculation method is Vn = V1 + (n-1) * Y, wherein n is the number of times of dust removal.

[0035] It can be understood that after each reverse dust removal, the dust cannot be completely removed, and part of the dust will still remain. Therefore, as the number of times of dust removal increases, the reverse speed of the outdoor heat exchanger fan needs to be increased to achieve the same dust removal effect each time. Therefore, the motor speed Vn for the nth time of dust removal gradually increases, and the increased value is the speed constant Y set by the person skilled in the art according to the needs.

[0036] It should be noted that the data of the motor speed V1 for the first time of dust removal is set by the person skilled in the art according to the needs. In some embodiments of the present application, V1 is 300 rpm / min, 330 rpm / min, etc.

[0037] It should be noted that in some embodiments of the present application, when calculating the dust removal speed Vn, the value of Y is in the range of Y≥30 rpm / min.

[0038] It should be noted that in some embodiments of the present application, when calculating the length of the nth time of dust removal, the maximum dust removal time Tmax is set. When S1 + (n-1) * X > Tmax, the dust removal time is Tmax.

[0039] It can be understood that in order to prevent the subsequent dust removal time from being too long after the cumulative dust removal times reach a certain number of times, affecting the user experience, the person skilled in the art sets a maximum dust removal time Tmax. When Sn≥Tmax, the dust removal time is Tmax.

[0040] It should be noted that in some embodiments of the present application, when calculating the motor speed Vn for the nth time of dust removal, the maximum motor speed Vmax for dust removal is set. When V1 + (n-1) * Y > Vmax, the dust removal motor speed is Vmax.

[0041] It can be understood that in order to prevent the subsequent dust removal speed from being too high after the cumulative dust removal times reach a certain number of times, which will produce too much noise and affect the service life of the outdoor heat exchanger, the person skilled in the art sets a maximum motor speed Vmax for dust removal. When Vn≥Vmax, the dust removal motor speed is Vmax.

[0042] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A method for controlling dust removal in the heat exchanger of an outdoor unit of an air conditioner, characterized in that, Includes the following steps: The cumulative running time of the air conditioner is set to T, and the cumulative running time of the outdoor unit of the air conditioner that needs to be dusted is preset to T_set. When the user turns on the air conditioner, the controller obtains the cumulative running time T of the air conditioner and the environmental data. When T≥T_set and the environmental data meets the requirements for dust removal, the outdoor unit of the air conditioner starts the dust removal mode. After the dust removal is completed, the air conditioner will resume normal operation for cooling or heating. The dust removal mode involves reversing the fan motor of the outdoor unit's heat exchanger to remove dust from the heat exchanger. After the outdoor unit of the air conditioner performs reverse dust removal, the cumulative running time T is reset to zero, and the cumulative time is reset after the reverse dust removal ends. Set the duration of the first dust removal as S1 and the time constant as X. Calculate the duration of the nth dust removal as Sn based on the duration of the first dust removal as S1 and the time constant as X. The calculation method is Sn = S1 + (n-1) * X, where n is the number of dust removal cycles. Set the motor speed to V1 during the first dust removal and set the speed constant Y. Calculate the motor speed Vn during the nth dust removal based on the motor speed V1 and speed constant Y. The calculation method is Vn = V1 + (n-1) * Y, where n is the number of dust removal cycles. The maximum dust removal time is set to Tmax. When calculating the duration of the nth dust removal, the dust removal time is Tmax when S1+(n-1)*X>Tmax. The maximum motor speed during dust removal is set to Vmax. When calculating the motor speed Vn during the nth dust removal, the dust removal motor speed is Vmax when V1+(n-1)*Y>Vmax.

2. The method for controlling dust removal in the heat exchanger of an outdoor unit of an air conditioner according to claim 1, characterized in that, In the step of the controller acquiring environmental data, the air conditioner connects to the network via its WiFi module to obtain local weather conditions. Dust removal is permitted when the weather is other than rain or snow.

3. The method for controlling dust removal in the heat exchanger of an outdoor unit of an air conditioner according to claim 1, characterized in that, When calculating the duration Sn of the nth dust removal cycle, the value of X is in the range of X≥2 seconds.

4. The method for controlling dust removal in the heat exchanger of an outdoor unit of an air conditioner according to claim 1, characterized in that, When calculating the motor speed Vn during the nth dust removal cycle, the value of Y is in the range of Y≥30rpm.

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