Anti-condensation control method, air conditioner and storage medium

Abstract

The present invention relates to the technical field of air conditioners, and in particular to a control method for preventing condensation, an air conditioner, and a storage medium. When the air conditioner is turned on and operates in a dehumidification or cooling mode, the following steps are performed: S1. Calculating the actual average power consumption P of the indoor unit fan in the same wind speed within a certain period of time 实 , and compare it with the rated power value P of the indoor fan 额 Compare and calculate P 实 / P 额 If the power ratio A is greater than the first threshold, an instruction is issued to adjust the opening of the electronic expansion valve, and then step S2 is executed; otherwise, step S2 is executed; S2. The average power consumption P is obtained again 实 , calculate P 实 / P 额 If the power ratio A is less than the second threshold, the outdoor unit fan speed is increased and step S1 is executed. If the power ratio A is greater than the first threshold, an instruction is issued and the opening of the electronic expansion valve is adjusted and step S1 is executed. This anti-condensation control method has the advantages of good anti-condensation effect, low noise and maintaining comfort.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an anti-condensation control method, an air conditioner and a storage medium. Background Art

[0002] Air conditioners, as a common intelligent device for regulating indoor temperature and humidity, have become widely used. While the widespread adoption of home and central air conditioners has improved people's living standards, it has also gradually exposed problems associated with their use. When an indoor air conditioner operates in cooling mode in a high-humidity environment, the hydrophilicity of the evaporator's aluminum foil decreases over time, potentially leading to condensation on the evaporator surface, resulting in dripping and blowing.

[0003] When operating in dehumidification or cooling mode, household air conditioners generate a certain amount of cooling capacity; this cooling capacity consists of two components: sensible heat and latent heat. Sensible heat can lower the dry-bulb temperature of the surrounding environment; latent heat can condense moisture in the ambient air, converting the gaseous moisture in the air into liquid water. The main causes of condensation in air conditioners are external and internal factors. The external factor is the high temperature and humidity of the indoor environment where the air conditioner is currently located, resulting in a large amount of water vapor in the air. The internal factor is the low temperature of the refrigerant flowing into the indoor unit during cooling operation, causing a large amount of water vapor in the air flowing through the indoor unit to condense into liquid dew droplets, resulting in condensation.

[0004] To address the above problem, currently, air guide plates and air outlet gaskets are used to prevent condensation from blowing out or dripping. However, if there is too much condensation on the evaporator surface, dripping and blowing water cannot be avoided.

[0005] Furthermore, the air conditioner's anti-condensation function also adjusts the compressor frequency (reducing the frequency) or the indoor unit fan speed (increasing the speed). Reducing the compressor frequency causes a change in the amount of refrigerant discharged, resulting in a decrease in the air conditioner's cooling capacity and comfort; while increasing the indoor unit fan speed also causes a change in noise, which can worsen the user experience. Therefore, while these two methods can control condensation to a certain extent, they can indirectly negatively impact the air conditioner's overall performance, negatively impacting the user's actual experience. Summary of the Invention

[0006] One of the purposes of the present invention is to avoid the deficiencies in the prior art and provide an anti-condensation control method, which can control anti-condensation without adding additional devices, and has the advantages of good anti-condensation effect, low noise and maintaining comfort.

[0007] A second object of the present invention is to provide an air conditioner.

[0008] A third object of the present invention is to provide a storage medium.

[0009] To achieve one of the above objectives, the present invention provides the following technical solutions:

[0010] A control method for preventing condensation is provided, wherein the method comprises the following steps: when the dehumidification or cooling mode is started, performing the following steps:

[0011] S1. Calculate the actual average power consumption P of the indoor fan at the same wind speed within a certain period of time. 实 , and compare it with the rated power value P of the indoor unit fan at the current wind speed 额 Compare and calculate P 实 / P 额 If the power ratio A is greater than the first threshold, an instruction is issued to adjust the opening of the electronic expansion valve, and then step S2 is executed; otherwise, step S2 is executed;

[0012] S2. Get the average power consumption P again 实 , according to the current P 实 , and then calculate P 实 / P 额 The power ratio A,

[0013] If the power ratio A is less than the second threshold, the outdoor fan speed is increased, and then step S1 is executed.

[0014] If the power ratio A is greater than the first threshold, a command is issued and the opening of the electronic expansion valve is adjusted, and then step S1 is executed.

[0015] Otherwise, directly execute step S1;

[0016] The first threshold is greater than the second threshold.

[0017] In some embodiments, the first threshold is set to 105% and the second threshold is set to 95%.

[0018] In some embodiments, the step of adjusting the opening of the electronic expansion valve includes:

[0019] When 105%≤A<115%,

[0020] If the current electronic expansion valve opening is ≤200P, the electronic expansion valve opening will increase by 10P.

[0021] If the current electronic expansion valve opening is greater than 200P, the electronic expansion valve opening is increased by 10%.

[0022] In some embodiments, the step of adjusting the opening of the electronic expansion valve includes:

[0023] When 115%≤A<125%,

[0024] If the current electronic expansion valve opening is ≤200P, the electronic expansion valve opening will increase by 20P;

[0025] If the current electronic expansion valve opening is greater than 200P, the electronic expansion valve opening is increased by 15%.

[0026] In some embodiments, the step of adjusting the opening of the electronic expansion valve includes:

[0027] When 125%≤A,

[0028] If the current electronic expansion valve opening is ≤200P, the electronic expansion valve opening will increase by 30P, and the outdoor unit fan speed will decrease by 30rpm.

[0029] If the current electronic expansion valve opening is greater than 200P, the electronic expansion valve opening is increased by 20%, and the outdoor unit fan speed is reduced by 30rpm.

[0030] In some embodiments, the average power consumption P 实 The average power consumption P calculated for several minutes 实 .

[0031] In some embodiments, the average power consumption P is calculated 实 If the wind speed of the indoor fan changes, the time is reset and the average power consumption P is calculated again. 实 ;

[0032] In some implementations, in step S2, the speed of the outdoor fan is increased by 20 rpm.

[0033] Beneficial effects of the anti-condensation control method of the present invention:

[0034] The anti-condensation control method of the present invention is that when condensation occurs on the evaporator, water droplets will be hung on the evaporator, which will affect the air output of the indoor unit, resulting in an increase in the load of the indoor fan and the fan power. Based on this, the actual average power consumption P of the indoor unit fan is calculated. 实 The rated power value P of the indoor unit fan 额, obtaining the rate of change of fan power. When the rate of change of fan power increases to a preset threshold, it is determined that anti-condensation measures are necessary. By adjusting the opening of the electronic expansion valve, the refrigerant temperature entering the evaporator is increased, thereby raising the evaporator temperature above the dew point, thereby slowing condensation. Furthermore, when the rate of change of fan power is less than the preset threshold, the fan speed of the outdoor unit is increased, thereby increasing heat exchange with the outdoor condenser, lowering the refrigerant temperature entering the evaporator, and lowering the evaporator temperature, thereby maintaining indoor comfort. Compared to traditional anti-condensation control methods, the present invention achieves anti-condensation effects by adjusting the opening of the indoor electronic expansion valve and the outdoor unit fan speed in a coordinated manner. This anti-condensation control method can be achieved without adding additional components, without affecting the existing structure of the appliance or increasing costs. It eliminates the need for continuous adjustment of the compressor frequency (reducing the frequency) or the indoor unit fan speed (increasing the speed), thereby maintaining comfort and reducing fan noise.

[0035] To achieve the second of the above objectives, the present invention provides the following technical solutions:

[0036] An air conditioner is provided, comprising a program mainboard, wherein the program mainboard is used to implement the above-mentioned anti-condensation control method.

[0037] To achieve the third of the above objectives, the present invention provides the following technical solutions:

[0038] A storage medium is provided, on which a program code is stored. When the program code is executed by a processor, the above-mentioned anti-condensation control method is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 FIG. 4 is a control logic flow chart of the anti-condensation control method according to an embodiment. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0041] The terms used in this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. As used in this invention and the appended claims, the singular forms "a" and "the" are intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0042] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0043] Example 1

[0044] The anti-condensation control method disclosed in this embodiment, when the machine is turned on and running in dehumidification or cooling mode, Figure 1 As shown, perform the following steps:

[0045] S1. Calculate the actual average power consumption P of the indoor fan at the same wind speed within a certain period of time. 实 , and compare it with the rated power value P of the indoor unit fan at the current wind speed 额 Compare and calculate P 实 / P 额 If the power ratio A is greater than a first threshold value, preferably, the first threshold value is set to 105%, an instruction is issued to adjust the opening of the electronic expansion valve, and then step S2 is executed; otherwise, step S2 is executed;

[0046] S2. Get the average power consumption P again 实 , according to the current P 实 , and then calculate P 实 / P 额 The power ratio A,

[0047] If the power ratio A is less than the second threshold value, preferably, the second threshold value is set to 95%, the outdoor unit fan speed is increased, and then step S1 is performed.

[0048] If the power ratio A is greater than the first threshold, a command is issued and the opening of the electronic expansion valve is adjusted, and then step S1 is executed.

[0049] Otherwise, directly execute step S1;

[0050] The first threshold is greater than the second threshold.

[0051] Among them, calculate the average power consumption P 实 If the wind speed of the indoor fan changes, the time is reset and the average power consumption P is calculated again. 实 Since different wind speeds have different corresponding rated powers (as shown in Table 1), it is necessary to calculate the average power consumption P in the same wind speed. 实.

[0052] Table 1

[0053]

[0054]

[0055] The control method of this embodiment only needs to maintain the opening of the electronic expansion valve after adjusting the opening of the electronic expansion valve, which has little effect on the air conditioning comfort. After the air conditioner is turned off, the electronic expansion valve will automatically reset.

[0056] The function and effect of the above anti-condensation control method: When condensation occurs on the evaporator, water droplets will be hung on the evaporator, which will affect the air output of the indoor unit, resulting in an increase in the load of the indoor fan and the fan power. Based on this, the actual average power consumption P of the indoor unit fan is calculated. 实 The rated power value P of the indoor unit fan 额 , obtaining the rate of change of fan power. When the rate of change of fan power increases to a preset threshold, it is determined that anti-condensation measures are necessary. By adjusting the opening of the electronic expansion valve, the refrigerant temperature entering the evaporator is increased, thereby raising the evaporator temperature above the dew point, thereby slowing condensation. Furthermore, when the rate of change of fan power is less than the preset threshold, the fan speed of the outdoor unit is increased, thereby increasing heat exchange with the outdoor condenser, lowering the refrigerant temperature entering the evaporator, and lowering the evaporator temperature, thereby maintaining indoor comfort. Compared to traditional anti-condensation control methods, the present invention achieves anti-condensation effects by adjusting the opening of the indoor electronic expansion valve and the outdoor unit fan speed in a coordinated manner. This anti-condensation control method can be achieved without adding additional components, without affecting the existing structure of the appliance or increasing costs. It eliminates the need for continuous adjustment of the compressor frequency (reducing the frequency) or the indoor unit fan speed (increasing the speed), thereby maintaining comfort and reducing fan noise.

[0057] In this embodiment, the step of adjusting the opening of the electronic expansion valve includes:

[0058] When 105% ≤ A < 115%, that is, when rated power * 105% ≤ average power consumption < rated power * 115%, it means that obvious condensation has occurred;

[0059] If the current electronic expansion valve opening is ≤200P, increase the electronic expansion valve opening by 10P. If the current electronic expansion valve opening is greater than 200P, increase the electronic expansion valve opening by 10%. When the electronic expansion valve opening is ≤200P, the effect can be achieved without increasing the opening significantly, so directly increase the specific opening by 10P. When the electronic expansion valve opening is greater than 200P, a larger opening is required to achieve the effect, so the current electronic expansion valve opening needs to be adjusted by 10%.

[0060] When 115% ≤ A < 125%, that is, when rated power * 115% ≤ average power consumption < rated power * 125%, condensation is more pronounced. If the current electronic expansion valve opening is ≤ 200P, increase the opening by 20P. If the current electronic expansion valve opening is greater than 200P, increase the opening by 15%. When the electronic expansion valve opening is ≤ 200P, a larger opening is not necessary to achieve the desired effect, so increase the opening by 20P. When the electronic expansion valve opening is greater than 200P, a larger opening is required to achieve the desired effect, so adjust the current electronic expansion valve opening by 15%.

[0061] In this embodiment, it is found that when A is less than 125%, the condensation problem can be overcome by simply increasing the opening of the electronic valve without adjusting the fan, thereby reducing the possibility of noise generation.

[0062] When 125% ≤ A, that is, when average power consumption ≥ rated power * 125%, if the current electronic expansion valve opening is ≤ 200P, the electronic expansion valve opening is increased by 30P, and the outdoor unit fan speed is reduced by 30rpm. The outdoor unit fan speed can also be reduced based on actual conditions. If the current electronic expansion valve opening is greater than 200P, the electronic expansion valve opening is increased by 20%, and the outdoor unit fan speed is reduced by 30rpm. The outdoor unit fan speed can also be reduced based on actual conditions. When the electronic expansion valve opening is ≤ 200P, the effect can be achieved without increasing the opening significantly, so the specific opening can be increased directly by 30P. When the electronic expansion valve opening is greater than 200P, a larger opening is required to achieve the effect, so the current electronic expansion valve opening needs to be adjusted by 20%.

[0063] This embodiment found that when the rate of change A is greater than 125%, not only does the electronic expansion valve opening increase to raise the evaporator temperature, but the fan speed is also reduced to reduce heat exchange with the outdoor unit's condenser, raising the refrigerant temperature entering the evaporator. This raises the evaporator temperature above the dew point, slowing condensation. In this case, the electronic expansion valve and fan work together to ensure effective condensation prevention while eliminating reliance on the fan alone, reducing noise.

[0064] In this embodiment, the average power consumption P 实 The average power consumption P calculated for several minutes 实 , for example 10 minutes, the specific time can be selected according to actual situation.

[0065] In this embodiment, in step S2, the speed of the outdoor fan is increased by 20 rpm. The speed of the outdoor fan can be increased according to actual needs.

[0066] Example 2

[0067] This embodiment discloses an air conditioner, including a program mainboard, which is used to implement the anti-condensation control method of embodiment 1.

[0068] Example 3

[0069] This embodiment discloses a storage medium having program code stored thereon. When the program code is executed by a processor, the anti-condensation control method of embodiment 1 is implemented.

[0070] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0071] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0072] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0073] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0074] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for controlling condensation prevention, characterized by: When the machine is turned on in dehumidification or cooling mode, perform the following steps: S1. Calculate the actual average power consumption P of the indoor fan at the same wind speed within a certain period of time. 实 , and compare it with the rated power value P of the indoor unit fan at the current wind speed 额 Compare and calculate P 实 / P 额 If the power ratio A is greater than the first threshold, an instruction is issued to adjust the opening of the electronic expansion valve, and then step S2 is executed; otherwise, step S2 is executed; S2. Get the average power consumption P again 实 , according to the current P 实 , and then calculate P 实 / P 额 The power ratio A, If the power ratio A is less than the second threshold, the outdoor fan speed is increased, and then step S1 is executed. If the power ratio A is greater than the first threshold, a command is issued and the opening of the electronic expansion valve is adjusted, and then step S1 is executed. Otherwise, directly execute step S1; The first threshold is greater than the second threshold; the average power consumption P 实 The average power consumption P calculated for several minutes 实 ; Calculate the average power consumption P 实 If the wind speed of the indoor fan changes, the time is reset and the average power consumption P is calculated again. 实 .

2. The anti-condensation control method according to claim 1, characterized in that: The first threshold is set to 105%, and the second threshold is set to 95%.

3. The anti-condensation control method according to claim 2, characterized in that: The step of adjusting the opening of the electronic expansion valve comprises: When 105%≤A<115%, If the current electronic expansion valve opening is ≤200P, the electronic expansion valve opening will increase by 10P. If the current electronic expansion valve opening is greater than 200P, the electronic expansion valve opening will increase by 10%.

4. The anti-condensation control method according to claim 2, characterized in that: The step of adjusting the opening of the electronic expansion valve comprises: When 115%≤A<125%, If the current electronic expansion valve opening is ≤200P, the electronic expansion valve opening will increase by 20P; If the current electronic expansion valve opening is greater than 200P, the electronic expansion valve opening will increase by 15%.

5. The anti-condensation control method according to claim 2, characterized in that: The step of adjusting the opening of the electronic expansion valve comprises: When 125%≤A, If the current electronic expansion valve opening is ≤200P, the electronic expansion valve opening will be increased by 30P, and the outdoor unit fan speed will be reduced by 30rpm; If the current electronic expansion valve opening is greater than 200P, the electronic expansion valve opening will increase by 20% and the outdoor unit fan speed will decrease by 30rpm.

6. The anti-condensation control method according to claim 1, characterized in that: In step S2, the outdoor unit fan speed is increased by 20 rpm.

7. An air conditioner, characterized in that: It comprises a program mainboard, and the program mainboard is used to implement the anti-condensation control method according to any one of claims 1 to 6.

8. A storage medium having program code stored thereon, characterized in that: When the program code is executed by a processor, the anti-condensation control method according to any one of claims 1 to 6 is implemented.

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