Control method for dust removal of heat exchanger of outdoor unit of air conditioner

Abstract

The invention discloses a dust removal control method for a heat exchanger of an outdoor unit of an air conditioner, relates to the technical field of air conditioners, and can reduce the power consumption of the air conditioner and save the electric charge while realizing automatic dust removal and improving the comfort of the air conditioner. The control method for dust removal of the heat exchanger of the outdoor unit of the air conditioner comprises the following steps that the accumulative operation duration of the air conditioner is set to be T, the accumulative operation duration of dust removal of the outdoor unit of the air conditioner is preset to be T, and after a user starts the air conditioner, a controller obtains the accumulative operation duration T of the air conditioner and environment data; and under the condition that the environment data meet the dust removal requirement, the air conditioner outdoor unit is started firstly to reversely remove dust, and after dust removal is finished, the air conditioner normally operates for refrigeration or heating. Timing dust removal of the outdoor unit of the air conditioner is achieved, comfort of the air conditioner is improved, power consumption of the air conditioner can be reduced, and electric charge is saved.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning, and in particular to a control method for dust removal of a heat exchanger of an outdoor unit of an air conditioner. Background Art

[0002] Split air conditioners have a large share in the domestic air conditioning market. Since their outdoor units are placed outdoors, dust will inevitably adhere to the air. When dust accumulates to a certain extent, the heat exchange efficiency of the outdoor heat exchanger will decrease, and the air conditioner's capacity will decay, causing users to find that the air conditioner "does not cool" after using it for a period of time, resulting in user complaints. Although many air conditioners currently have a self-cleaning function for outdoor units, it requires the user to actively operate it. Many users do not read the instructions or older users do not know how to operate it or even know that this function exists. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a control method for dust removal of an outdoor unit heat exchanger of an air conditioner, which can realize automatic dust removal, improve the comfort of air conditioning, reduce the power consumption of air conditioning and save electricity bills.

[0004] The present invention 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 accumulated running time of the air conditioner as T, presetting the accumulated running time of the outdoor unit of the air conditioner for dust removal as Tset, when the user turns on the air conditioner, the controller obtains the accumulated running time T of the air conditioner and environmental data, when T≥Tset, and the environmental data meets the condition of dust removal, first starting the outdoor unit of the air conditioner for reverse dust removal, and after the dust removal is completed, the air conditioner operates normally for cooling or heating.

[0005] A control method for dust removal of a heat exchanger of an air conditioner outdoor unit according to an embodiment of the present invention has at least the following beneficial effects: the air conditioner outdoor unit is controlled by a controller, and when the environment and the accumulated operating time meet the dust removal conditions, the controller controls the air conditioner outdoor unit fan to reverse and remove dust, thereby reducing dust accumulation in the air conditioner outdoor unit, reducing power consumption of the air conditioner, and saving electricity bills.

[0006] According to a control method for dust removal of an outdoor unit heat exchanger of an air conditioner described in the present invention, in the step of the controller acquiring environmental data, networking is performed through the WiFi module of the air conditioner to obtain local weather conditions. When the weather is other than raining or snowing, dust removal is allowed.

[0007] According to a control method for dust removal of a heat exchanger of an air conditioner outdoor unit of the present invention, after the air conditioner outdoor unit performs reverse dust removal, the accumulated running time T is reset to zero, and accumulation is restarted after the reverse dust removal.

[0008] According to a control method for dust removal of an outdoor unit heat exchanger of an air conditioner described in the present invention, the first dust removal time is set to S1, and the time constant X is set. The nth dust removal time Sn is calculated based on the first dust removal time S1 and the time constant X. The calculation method is Sn=S1+(n-1)*X, where n is the number of dust removal times.

[0009] According to a control method for dust removal of a heat exchanger of an outdoor unit of an air conditioner described in the present invention, when calculating the dust removal time Sn, the value range of X is X≥2 seconds.

[0010] According to a control method for dust removal of an outdoor unit heat exchanger of an air conditioner described in the present invention, the motor speed during the first dust removal is set to V1, and the speed constant Y is set. The motor speed Vn during the nth dust removal is calculated based on the motor speed V1 during the first dust removal and the speed constant Y. The calculation method is Vn=V1+(n-1)*Y, where n is the number of dust removal times.

[0011] According to the control method for dust removal of a heat exchanger of an outdoor unit of an air conditioner described in the present invention, when calculating the dust removal rotation speed Vn, the value range of Y is Y≥30rpm / min.

[0012] According to a control method for dust removal of an outdoor unit heat exchanger of an air conditioner described in the present invention, when calculating the nth dust removal time, the maximum dust removal time is set to Tmax, and when S1+(n-1)*X>Tmax, the dust removal time is Tmax.

[0013] According to a control method for dust removal of an air conditioner outdoor unit heat exchanger described in the present invention, when calculating the nth dust removal motor speed Vn, the maximum motor speed during dust removal is set to Vmax, and when V1+(n-1)*Y>Vmax, the dust removal motor speed is Vmax.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 4 is a control flow chart of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0017] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0018] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0020] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

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

[0022] Set the accumulated running time of the air conditioner to T, and preset the accumulated running time of the air conditioner outdoor unit that needs dust removal to Tset. When the user turns on the air conditioner, the controller obtains the accumulated running time T of the air conditioner and the environmental data. When T≥Tset and the environmental data meets the requirements for dust removal, the air conditioner outdoor unit is started to reverse and remove dust first. After the dust removal is completed, the air conditioner will operate normally for cooling or heating.

[0023] It can be understood that the working process of the present invention is as follows: starting from the first operation of the air conditioner after installation, the cumulative operation time T is recorded. When the air conditioner is turned on again after running for a period of time, if it is detected that T is greater than or equal to the preset cumulative operation time T that requires dust removal, and at the same time the environmental conditions meet the dust removal requirements, the fan of the radiator of the outdoor unit of the air conditioner first runs in reverse to remove dust, and then runs forward to perform normal cooling or heating work after dust removal is completed. The timed dust removal of the outdoor unit of the air conditioner is realized, which not only improves the comfort of the air conditioner, but also reduces the power consumption of the air conditioner and saves electricity bills.

[0024] It should be noted that the accumulated running time of the air conditioner outdoor unit that requires dust removal is preset as Tset, and the value of Tset is set by technicians in this field according to the dust accumulation situation.

[0025] Reference Figure 1,In the step of the controller obtaining environmental data, the WiFi module of the air conditioner is connected to the Internet to obtain the local weather conditions. When the weather is other than raining or snowing, dust removal is allowed.

[0026] It is worth mentioning that the weather suitable for dust removal is sunny, cloudy and other weather. It is not suitable for dust removal on snowy and rainy days because there will be water droplets hanging on the outdoor heat exchanger or dust adsorbed on the copper tubes and fins. The dust removal effect of relying solely on fan reverse blowing is not good.

[0027] Therefore, when the air conditioner is turned on, it connects to the Internet through the WiFi module of the air conditioner to obtain local weather conditions, and the control panel of the air conditioner records the usage time of the air conditioner. When the dust removal conditions are met, the fan of the outdoor unit reverses to blow away the dust on the outdoor unit heat exchanger, thereby protecting the outdoor heat exchanger.

[0028] Reference Figure 1 After the outdoor unit of the air conditioner performs reverse dust removal, the accumulated running time T is reset to zero and is accumulated again after the reverse dust removal.

[0029] It is understandable that, in the embodiment of the present invention, after each reverse dust removal, the accumulated running time T is reset to zero and the accumulation starts again, so as to avoid dust removal being performed each time the machine is turned on after T≥T is set for the first time.

[0030] Reference Figure 1 The degree of dust accumulation on the heat exchanger of the outdoor unit of the air conditioner will be different depending on the installation time of the outdoor unit of the air conditioner. According to the different installation time of the air conditioner, the first dust removal time is set to S1, 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. The calculation method is Sn=S1+(n-1)*X, where n is the number of dust removal times.

[0031] It is understandable that after each reverse dust removal, the dust cannot be completely removed, and some dust will still remain attached. Therefore, as the number of dust removals increases, the dust removal time required to achieve the same dust removal effect each time will also become longer. Therefore, the length of each dust removal Sn gradually increases, and the increased value is the unit time constant X set by technical personnel in this field as needed.

[0032] It should be noted that the data of the first dust removal duration S1 is set by those skilled in the art according to needs. In some embodiments of the present invention, S1 is a value such as 20 seconds, 25 seconds or 30 seconds.

[0033] It is worth noting that, in some embodiments of the present invention, when calculating the dust removal time Sn, the value range of X is X≥2 seconds.

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

[0035] It is understandable that after each reverse dust removal, the dust cannot be completely removed, and some dust will still remain attached. Therefore, as the number of dust removals increases, each time you want to achieve the same dust removal effect, you need to increase the reverse speed of the outdoor heat exchanger fan accordingly. Therefore, the motor speed Vn gradually increases during the nth dust removal, and the increased value is the speed constant Y set by technical personnel in this field according to needs.

[0036] It should be noted that the data of the motor speed V1 during the first dust removal is set by those skilled in the art according to needs. In some embodiments of the present invention, V1 is 300 rpm / min, 330 rpm / min, and other values.

[0037] It is worth noting that, in some embodiments of the present invention, when calculating the dust removal rotation speed Vn, the value range of Y is Y≥30rpm / min.

[0038] It is worth noting that, in some embodiments of the present invention, when calculating the duration of the n-th dust removal, the maximum dust removal time is set to Tmax, and when S1+(n-1)*X>Tmax, the dust removal time is Tmax.

[0039] It is understandable that in order to prevent the subsequent dust removal time from being too long and affecting the user experience after the cumulative dust removal times reach a certain number, a maximum dust removal time Tmax is set by technical personnel in this field. When Sn≥Tmax, the dust removal time is always Tmax.

[0040] It is worth noting that in some embodiments of the present invention, when calculating the nth dust removal motor speed Vn, the maximum motor speed during dust removal is set to Vmax. When V1+(n-1)*Y>Vmax, the dust removal motor speed is Vmax.

[0041] It is understandable that in order to prevent the subsequent dust removal speed from being too high and generating excessive noise after the cumulative dust removal times reach a certain number, and affecting the life of the outdoor heat exchanger, technical personnel in this field set a maximum motor speed during dust removal to Vmax. When Vn≥Vmax, the dust removal motor speed is always Vmax.

[0042] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A control method for dust removal of an outdoor heat exchanger of an air conditioner, characterized in that: The following steps are involved: Set the accumulated running time of the air conditioner to T, and preset the accumulated running time of the air conditioner outdoor unit that needs dust removal to Tset. When the user turns on the air conditioner, the controller obtains the accumulated running time T of the air conditioner and the environmental data. When T≥Tset and the environmental data meets the requirements for dust removal, the air conditioner outdoor unit starts the dust removal mode. After the dust removal is completed, the air conditioner operates normally for cooling or heating.

2. A control method for dust removal of an outdoor heat exchanger of an air conditioner according to claim 1, characterized in that: The dust removal mode is to reverse the fan motor of the heat exchanger of the air conditioner outdoor unit to remove dust from the heat exchanger.

3. A control method for dust removal of an outdoor heat exchanger of an air conditioner according to claim 2, characterized in that: In the step of the controller acquiring environmental data, the air conditioner's WiFi module is used to connect to the Internet to obtain the local weather conditions. When the weather is other than rain or snow, dust removal is allowed.

4. A control method for dust removal of an outdoor heat exchanger of an air conditioner according to claim 2, characterized in that: After the outdoor unit of the air conditioner performs reverse dust removal, the accumulated running time T is reset to zero, and the accumulation is restarted after the self-reversal dust removal is completed.

5. A control method for dust removal of an outdoor heat exchanger of an air conditioner according to claim 4, characterized in that: Set the first dust removal time S1, set the time constant X, and calculate the nth dust removal time Sn according to the first dust removal time S1 and the time constant X. The calculation method is Sn=S1+(n-1)*X, where n is the number of dust removal times.

6. A control method for dust removal of an outdoor heat exchanger of an air conditioner according to claim 5, characterized in that: When calculating the dust removal time Sn, the value range of X is X ≥ 2 seconds.

7. A control method for dust removal of an outdoor heat exchanger of an air conditioner according to claim 4 or 5, characterized in that: Set the motor speed during the first dust removal to V1, set the speed constant Y, and calculate the motor speed Vn during the nth dust removal based on the motor speed V1 during the first dust removal and the speed constant Y. The calculation method is Vn=V1+(n-1)*Y, where n is the number of dust removal times.

8. A control method for dust removal of an outdoor heat exchanger of an air conditioner according to claim 7, characterized in that: When calculating the dust removal speed Vn, the value range of Y is Y≥30rpm / min.

9. A control method for dust removal of an outdoor heat exchanger of an air conditioner according to claim 5, characterized in that: The maximum dust removal time is set to Tmax. When calculating the duration of the n-th dust removal, when S1+(n-1)*X>Tmax, the dust removal time is Tmax.

10. A control method for dust removal of a heat exchanger of an air conditioner outdoor unit according to claim 7, characterized in that: The maximum motor speed during dust removal is set to Vmax. When calculating the nth dust removal motor speed Vn, when V1+(n-1)*Y>Vmax, the dust removal motor speed is Vmax.

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