Method, device, air conditioner and storage medium for preventing condensation in air conditioner

Abstract

The present application relates to the technical field of smart home appliances, and discloses a method for preventing condensation in an air conditioner, wherein the air conditioner includes an outdoor fresh air duct, and an electric heating device is provided at the air inlet of the outdoor fresh air duct, and the method includes: when the air conditioner turns on the fresh air function, determining the switch state of the fresh air fan and the indoor dew point temperature; determining the current fresh air function stage according to the switch state of the fresh air fan; determining the change trend of the fresh air temperature in the current fresh air function stage; and controlling the operation of the electric heating device and / or the fresh air fan according to the change trend of the fresh air temperature and the indoor dew point temperature. Based on the indoor dew point temperature and the change trend of the fresh air temperature in the current fresh air function stage, the operation of the electric heating device and / or the fresh air fan is controlled, and the optimal operation scheme of the electric heating device and / or the fresh air fan under different conditions can be matched. Thereby improving the anti-condensation effect of the air conditioner. The present application also discloses a device for preventing condensation in an air conditioner, an air conditioner, and a storage medium.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, for example, to a method, device, air conditioner and storage medium for preventing condensation in an air conditioner. Background Art

[0002] When the air conditioner is running the fresh air function in winter, the outdoor temperature is low, which will cause the temperature inside the indoor fresh air duct to be low. More condensation will be produced on the indoor fresh air duct, which will cause the air conditioner to blow water and drip water.

[0003] A control method for preventing condensation at an air outlet of an air conditioner is disclosed in the related art, the method comprising: determining whether there is condensation in a target area based on detected data, wherein the data is any one of the following data: the operating time of the air conditioner, the temperature data of the indoor environment in which the air conditioner is located, the temperature data of the outdoor environment in which the air conditioner is located, and the humidity data of the indoor environment in which the air conditioner is located, and the target area is an area of ​​a predetermined surface that can be reached by the air outlet of the lower air outlet; when it is determined that there is condensation in the target area, a predetermined control strategy is adopted to control the operation of the air conditioner to eliminate the condensation, wherein the predetermined control strategy comprises at least one of the following: increasing the outlet wind speed of the fan in the air conditioner, turning on the heating belt arranged on the lower air outlet panel, reducing the compression frequency of the compressor of the air conditioner, turning off the compressor, and closing the lower air outlet.

[0004] In the above method, when condensation has already occurred in the target area, controlling the wind speed of the fan, the heating zone, the compressor frequency and other parameters to eliminate the condensation cannot achieve a good preventive effect. Summary of the invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] Embodiments of the present disclosure provide a method, a device, an air conditioner, and a storage medium for preventing condensation in an air conditioner, so as to improve the effect of preventing condensation.

[0007] In some embodiments, the air conditioner includes an outdoor fresh air duct, and an electric heating device is provided at the air inlet of the outdoor fresh air duct. The method includes: when the fresh air function of the air conditioner is turned on, determining the switch state of the fresh air fan and the indoor dew point temperature; determining the current fresh air function stage according to the switch state of the fresh air fan; determining the changing trend of the fresh air temperature in the current fresh air function stage; and controlling the operation of the electric heating device and / or the fresh air fan according to the changing trend of the fresh air temperature and the indoor dew point temperature.

[0008] In an embodiment, the device comprises: a processor and a memory storing program instructions, and the processor is configured to execute the aforementioned method for preventing condensation in an air conditioner when running the program instructions.

[0009] In some embodiments, the air conditioner includes: the device for preventing condensation of the air conditioner as described above.

[0010] In some embodiments, the storage medium stores program instructions, and when the program instructions are run, the aforementioned method for preventing condensation in air conditioning is executed.

[0011] The method, device, air conditioner and storage medium for preventing condensation in an air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0012] Based on the on / off state of the fresh air fan, determine the change trend of the fresh air temperature under the current fresh air fan state. The on / off state of the fresh air fan can characterize the stage of the fresh air function. When the fresh air fan is in different states, it will affect the generation of condensation. The change trend of the fresh air temperature will also affect the generation of condensation. Therefore, based on the indoor dew point temperature and the change trend of the fresh air temperature under the current fresh air function stage, the operation of the electric heating device and / or the fresh air fan is controlled, and the optimal operation plan of the electric heating device and / or the fresh air fan under different conditions can be matched. Thereby improving the anti-condensation effect of the air conditioner.

[0013] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0015] Figure 1 is a schematic diagram of a method for preventing condensation in an air conditioner provided by an embodiment of the present disclosure;

[0016] Figure 2 is a schematic diagram of another method for preventing condensation in an air conditioner provided by an embodiment of the present disclosure;

[0017] Figure 3 is a schematic diagram of another method for preventing condensation in an air conditioner provided by an embodiment of the present disclosure;

[0018] Figure 4 is a schematic diagram of another method for preventing condensation in an air conditioner provided by an embodiment of the present disclosure;

[0019] Figure 5 is an application schematic diagram provided by an embodiment of the present disclosure;

[0020] Figure 6 is a schematic diagram of a device for preventing condensation in an air conditioner provided by an embodiment of the present disclosure;

[0021] Figure 7 It is a schematic diagram of another device for preventing condensation in air conditioning provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0022] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0023] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0024] Unless otherwise stated, the term "plurality" means two or more.

[0025] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0026] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0027] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0028] The embodiment of the present disclosure provides an air conditioner. The air conditioner includes an outdoor fresh air duct and an indoor fresh air duct. An electric heating device is provided at the air inlet of the outdoor fresh air duct. The electric heating device can heat the fresh air entering the outdoor fresh air duct. Optionally, the electric heating device includes an electric heating wire. The electric heating wire is wound around the inner wall of the outdoor fresh air duct.

[0029] A temperature sensor is also provided in the outdoor fresh air duct to detect the fresh air temperature. Optionally, there is a certain distance between the temperature sensor and the electric heating device, and the temperature sensor is closer to the room. In this way, when the electric heating device heats the fresh air, the temperature sensor can detect the temperature of the heated fresh air to ensure the prevention effect of condensation; at the same time, it can also avoid the heating of the electric heating device affecting the detection of the fresh air temperature. Optionally, the distance between the temperature sensor and the electric heating device is 5cm-8cm.

[0030] Combination Figure 1 The present disclosure provides a method for preventing condensation in an air conditioner, comprising:

[0031] S101, the processor determines the switch state of the fresh air fan and the indoor dew point temperature when the fresh air function of the air conditioner is turned on.

[0032] S102, the processor determines the current fresh air function stage according to the on / off state of the fresh air fan.

[0033] S103, the processor determines the change trend of the fresh air temperature in the current fresh air function stage.

[0034] S104, the processor controls the operation of the electric heating device and / or the fresh air fan according to the change trend of the fresh air temperature and the indoor dew point temperature.

[0035] The user can send a command to the air conditioner to turn on the fresh air function through a remote control or terminal device. After receiving the command, the air conditioner parses the command to respond to the command to turn on the fresh air function. When the air conditioner turns on the fresh air function, the switch state of the fresh air fan and the indoor dew point temperature are determined. This is because when the fresh air fan is turned on, outdoor fresh air will be transported indoors. If the fresh air temperature is lower than the indoor dew point temperature, condensation will occur. In other words, the generation of condensation is related to both the indoor dew point temperature and the switch state of the fresh air fan. According to the switch state of the fresh air fan, the fresh air function stage is determined. The fresh air fan is in different states, corresponding to different stages of the fresh air function. In the current fresh air function stage, the change trend of the fresh air temperature is determined. The change trend of the fresh air temperature mainly includes a first trend and a second trend, wherein the first trend and the second trend are completely opposite. Different change trends of the fresh air temperature will also affect the condensation risk. According to the change trend of the fresh air temperature and the indoor dew point temperature, the operation of the electric heating device and / or the fresh air fan is controlled.

[0036] In the disclosed embodiment, based on the on / off state of the fresh air fan, the changing trend of the fresh air temperature under the current fresh air fan state is determined. The on / off state of the fresh air fan can characterize the stage of the fresh air function. When the fresh air fan is in different states, it will affect the generation of condensation. And the changing trend of the fresh air temperature will also affect the generation of condensation. Therefore, based on the indoor dew point temperature and the changing trend of the fresh air temperature under the current fresh air function stage, the operation of the electric heating device and / or the fresh air fan is controlled, and the optimal operation scheme of the electric heating device and / or the fresh air fan under different conditions can be matched. Thereby improving the anti-condensation effect of the air conditioner.

[0037] Optionally, in step S101, the processor determines the indoor dew point temperature, including:

[0038] The processor obtains the indoor temperature and indoor humidity.

[0039] The processor determines the indoor dew point temperature based on the indoor temperature and the indoor humidity.

[0040] The indoor unit of the air conditioner is equipped with a temperature sensor and a humidity sensor which are communicatively connected to the processor of the air conditioner, or the temperature sensor and humidity sensor arranged indoors are communicatively connected to the processor of the air conditioner, so that the air conditioner can obtain the indoor temperature and humidity.

[0041] Determine the indoor dew point temperature based on the indoor temperature and indoor humidity:

[0042]

[0043] in, is the indoor dew point temperature; is the indoor temperature; ; is the indoor relative humidity; is the first constant; is the second constant; is the natural logarithm.

[0044] When the indoor temperature Comply with 0℃< <60℃, indoor relative humidity Comply with 0%< <100%, and the indoor dew point temperature Comply with 0℃< When the temperature is less than 50℃, the formula can be used: , calculate the indoor dew point temperature. =17.27; =237.7. In this way, when the indoor temperature and indoor humidity are obtained, the indoor dew point temperature at this time can be calculated by the above formula.

[0045] Optionally, combined Figure 2 , the embodiment of the present disclosure provides another method for preventing condensation in an air conditioner, comprising:

[0046] S101, the processor determines the switch state of the fresh air fan and the indoor dew point temperature when the fresh air function of the air conditioner is turned on.

[0047] S112: When the fresh air fan is in the on state, the processor determines that the current fresh air function stage is the operation stage.

[0048] S122: When the fresh air fan is in the off state, the processor determines that the current fresh air function stage is a pause stage.

[0049] S103, the processor determines the change trend of the fresh air temperature in the current fresh air function stage.

[0050] S104, the processor controls the operation of the electric heating device and / or the fresh air fan according to the change trend of the fresh air temperature and the indoor dew point temperature.

[0051] Optionally, a current sensor is provided on the line connected to the fresh air fan to detect whether there is current in the fresh air fan. If yes, it is determined that the fresh air fan is in the on state. If not, it is determined that the fresh air fan is in the off state. When the fresh air fan is in the on state, it means that the fresh air fan is running. Under the action of the fresh air fan, the outdoor fresh air flows from the outdoor to the indoor. At this time, the current fresh air function stage is the running stage. When the fresh air fan is in the off state, the fresh air fan stops running. Then the outdoor fresh air cannot flow into the room, and the current fresh air function stage is the pause stage. At this time, although the air conditioner still turns on the fresh air function, the fresh air fan does not run. This happens because the fresh air is too much lower than the indoor dew point temperature. If fresh air continues to be input into the room, condensation cannot be avoided. Therefore, controlling the fresh air to shut down and stopping the fresh air delivery can reduce the generation of condensation.

[0052] It should be noted that the specific implementation of steps S101, S103 and S104 can be found in the above embodiments and will not be described in detail here.

[0053] Optionally, combined Figure 3 , the embodiment of the present disclosure provides another method for preventing condensation in an air conditioner, comprising:

[0054] S101, the processor determines the switch state of the fresh air fan and the indoor dew point temperature when the fresh air function of the air conditioner is turned on.

[0055] S102, the processor determines the current fresh air function stage according to the on / off state of the fresh air fan.

[0056] S103, the processor determines the change trend of the fresh air temperature in the current fresh air function stage.

[0057] S114: The processor determines a plurality of dew point temperature thresholds according to the indoor dew point temperature.

[0058] S124: When the fresh air temperature is less than the first dew point temperature threshold and the change trend of the fresh air temperature is the first trend, the processor controls the fresh air fan and / or the electric heating device to operate according to the first preset scheme.

[0059] S134: When the fresh air temperature is less than the first dew point temperature threshold and the change trend of the fresh air temperature is the second trend, the processor controls the fresh air fan and / or the electric heating device to operate according to the second preset scheme.

[0060] Determine the indoor dew point temperature Then, according to the indoor dew point temperature Determine multiple dew point temperature thresholds. Optionally, based on the indoor dew point temperature, add different , thereby obtaining multiple dew point temperature thresholds. The dew point temperature threshold includes a first dew point temperature threshold. If the fresh air temperature is less than the first dew point temperature threshold, it indicates that the fresh air temperature is low and condensation is easy to occur in the indoor fresh air duct. At this time, if the change trend of the fresh air temperature is the first trend, the fresh air fan and / or the electric heating device are controlled to operate according to the first preset scheme. If the change trend of the fresh air temperature is the second trend, the fresh air fan and / or the electric heating device are controlled to operate according to the second preset scheme. Among them, the first trend is a decreasing trend, and the second trend is an increasing trend. The second preset scheme is different from the first preset scheme. When the fresh air temperature is in a downward trend, the lower the fresh air temperature, the higher the probability of condensation. In this case, the greater the intensity of preventing condensation, the main focus is on preventing condensation, and the second focus is on meeting the user's fresh air needs. When the fresh air temperature is in an upward trend, the higher the fresh air temperature, the lower the probability of condensation. In this case, the smaller the intensity of preventing condensation, the main focus is on meeting the user's fresh air needs, and the second focus is on preventing condensation. Therefore, according to different changing trends of the fresh air temperature, the electric heating device and / or the fresh air fan are controlled to operate according to different preset plans so as to improve the prevention effect of condensation.

[0061] It should be noted that the specific implementation of steps S101, S102 and S103 can be found in the above embodiments and will not be described in detail here.

[0062] Optionally, at S124, the processor controls the fresh air blower and / or the electric heating device to operate according to a first preset scheme, including:

[0063] The processor determines an operation scheme of the fresh air fan and / or the electric heating device corresponding to the current fresh air temperature according to a first association relationship between the fresh air temperature and the operation scheme of the fresh air fan and / or the electric heating device.

[0064] The processor controls the fresh air fan and / or the electric heating device to operate according to the determined operation plan.

[0065] The processor of the air conditioner pre-stores a first association relationship between fresh air temperature and operation scheme. The first association relationship includes one or more corresponding relationships between fresh air temperature and operation scheme.

[0066] Specifically, multiple dew point temperature thresholds can form multiple continuous dew point temperature intervals. Determine the dew point temperature interval in which the fresh air temperature is located. Optionally, the first dew point temperature interval is , the second dew point temperature range is , the third dew point temperature range is .in, , that is, the second dew point temperature interval is smaller than the first dew point temperature interval and larger than the third dew point temperature interval. The first dew point temperature threshold is the upper limit of the first dew point temperature interval, which is . Optionally, It can be 1°C. It can be 3°C.

[0067] When the fresh air temperature is in different dew point temperature ranges, different operation plans are corresponding. When the fresh air temperature is in the first dew point temperature range, although the fresh air temperature is lower than the indoor dew point temperature, there is a risk of condensation, but the risk is not high. At this time, the electric heating device is controlled to turn on, so that the electric heating device heats the fresh air and increases the fresh air temperature. Thereby reducing the risk of condensation.

[0068] When the electric heating device is in the on state, the fresh air temperature drops below the lower limit of the first dew point temperature interval, which means that the means of heating the fresh air cannot prevent condensation well. This is because if the speed of the fresh air fan is too high, the amount of fresh air will be very large. There will be a problem that even if the fresh air is heated by the electric heating device, the heating effect of the electric heating device on the fresh air is not obvious due to the excessive amount of fresh air. In this case, the operation of the fresh air fan can be controlled to further prevent condensation. Specifically, the smaller the dew point temperature interval in which the fresh air temperature is located, the lower the speed of the fresh air fan is controlled. When the fresh air temperature is in the second dew point temperature interval, the fresh air temperature becomes lower and the risk of condensation increases. At this time, the fresh air fan is controlled to reduce the speed at a first rate, that is, the speed of the fresh air fan is gradually reduced until it drops to the minimum speed. Optionally, the first rate is 50rad / 10s.

[0069] When the fresh air temperature is within the third dew point temperature interval, it indicates that the fresh air temperature has become very low. The duration in the third dew point temperature interval is determined. If the preset duration is maintained, it indicates that the fresh air temperature at this time is in an excessively low temperature state for a long time. Even if the fresh air volume is reduced by reducing the speed of the fresh air fan, the electric heating device cannot increase the fresh air temperature. At this time, for the prevention of condensation, the means of controlling the speed of the fresh air fan and heating the fresh air are ineffective. In this case, the fresh air is controlled to shut down. The fresh air function is in a pause stage to fundamentally avoid the generation of condensation. At the same time, since the fresh air function is no longer running, there is no need to continue to run the electric heating device. Then the electric heating device is controlled to shut down to save electricity. At this time, the fresh air cover is controlled to close to prevent the outdoor temperature from being too low, causing condensation on the wall of the outdoor fresh air duct. Optionally, the preset duration is 10-15 minutes, which can also be adjusted according to actual needs.

[0070] In this way, when the temperature of the fresh air does not drop significantly, the electric heating device is first controlled to turn on. By heating the fresh air and increasing the temperature of the fresh air, the probability of condensation is reduced. At the same time, the speed of the fresh air fan is not changed to ensure the fresh air delivery volume. When the temperature of the fresh air drops significantly, the speed of the fresh air fan is reduced to reduce the amount of fresh air introduced. The heating device can sufficiently heat a small amount of fresh air, thereby improving the prevention effect of condensation. When the temperature of the fresh air drops to a lower level, the fresh air fan and the electric heating device are controlled to stop running temporarily, and no fresh air is introduced. This fundamentally avoids the occurrence of condensation. In this way, based on the degree of reduction in the fresh air temperature, the electric heating device and / or the fresh air fan are controlled to run different schemes to make the fresh air temperature and fresh air volume appropriate, thereby improving the prevention effect of condensation.

[0071] Optionally, if the electric heating device has multiple heating gears, the gear of the electric heating device can be controlled to increase while the fan speed is reduced. Specifically, the increase in the gear of the electric heating device and the decrease in the speed of the fresh air fan are controlled to be synchronized. For example, if the speed of the fresh air fan is reduced by 50rad / 10s, the electric heating device is controlled to increase one gear every 10s until the gear of the electric heating device is increased to the highest gear. In this way, the increase in the gear of the electric heating device and the decrease in the speed of the fresh air fan are controlled to be synchronized, so that the temperature of the fresh air can be increased as soon as possible, thereby improving the prevention effect of condensation.

[0072] Optionally, if the electric heating device is raised to the highest gear and the speed of the fresh air fan is reduced to the lowest gear, but the fresh air temperature remains within the third dew point temperature range for a preset period of time, the fresh air fan and the electric heating device are controlled to be turned off.

[0073] Optionally, at S134, the processor controls the fresh air blower and / or the electric heating device to operate according to a second preset scheme, including:

[0074] The processor determines an operation plan of the fresh air fan and / or the electric heating device corresponding to the current fresh air temperature according to a second association relationship between the fresh air temperature and the operation plan of the fresh air fan and / or the electric heating device.

[0075] The processor controls the fresh air fan and / or the electric heating device to operate according to the determined operation plan.

[0076] The processor of the air conditioner pre-stores a second association relationship between fresh air temperature and operation scheme. The second association relationship includes one or more corresponding relationships between fresh air temperature and operation scheme.

[0077] Specifically, multiple dew point temperature thresholds can form multiple continuous dew point temperature intervals. Determine the dew point temperature interval in which the fresh air temperature is located. Optionally, the fourth dew point temperature interval is , the fifth dew point temperature range is , the sixth dew point temperature interval is .in, , , that is, the fifth dew point temperature interval is smaller than the sixth dew point temperature interval, and larger than the fourth dew point temperature interval. Optionally, It can be 1.5℃. It can be 2.5℃. It can be 3.5℃.

[0078] When the fresh air temperature is in different dew point temperature ranges, different operation plans correspond. The larger the dew point temperature range, the greater the speed of the fresh air fan. When the fresh air temperature is in the fourth dew point temperature range, the fresh air temperature is higher than the indoor dew point temperature, and the risk of condensation is reduced. The speed of the fresh air fan can be increased to meet the user's demand for fresh air. At this time, the fan is controlled to increase the speed at the second rate, that is, the speed of the fresh air fan is gradually increased until it reaches the preset speed. At this time, the electric heating device remains on. This is because, after the speed of the fresh air fan increases, the amount of fresh air introduced will increase. If the electric heating device is controlled to shut down at this time, condensation is likely to occur due to the increase in the amount of fresh air. Therefore, when the amount of fresh air increases, the electric heating device is still controlled to heat the fresh air, which can ensure the prevention effect of condensation.

[0079] Optionally, the speed of the fresh air fan when the fresh air function is just turned on is defined as the initial speed. Generally, when the fresh air function is just turned on, the fresh air fan runs at the maximum speed. Optionally, the preset speed is less than the initial speed, that is, less than the maximum speed. Since the fresh air temperature is not very high when it is within the fourth dew point temperature range, the fresh air fan runs at a speed less than the maximum speed at this time to avoid the problem of introducing too much fresh air, which will increase the probability of condensation.

[0080] Optionally, the second rate is less than the first rate. That is, the speed increase rate is less than the speed decrease rate. In this way, the speed decrease is performed at a larger rate so as to reduce the fresh air volume as quickly as possible, so that the electric heating device can fully heat the fresh air, thereby effectively preventing condensation. While the speed increase is performed at a smaller rate, the speed of the fresh air fan can be prevented from increasing too quickly. In this way, once the fresh air temperature drops, the slowly increasing speed can be quickly reduced, thereby effectively preventing condensation. Optionally, the second rate is 50rad / 30s.

[0081] When the fresh air temperature is within the fifth dew point temperature range, it indicates that the fresh air temperature rises significantly. The risk of condensation is further reduced. At this time, the speed of the fresh air fan is controlled to increase to the initial speed, that is, the fresh air fan is controlled to run at the maximum speed. This fully guarantees the user's demand for fresh air. At this time, the electric heating device remains turned on. The electric heating device heats the fresh air to ensure the prevention effect of condensation.

[0082] When the fresh air temperature is within the sixth dew point temperature range, it indicates that the fresh air temperature has risen to a sufficiently high temperature and there is no risk of condensation. The electric heating device is controlled to shut down to save electricity.

[0083] In this way, when the increase in the fresh air temperature is not obvious, the speed of the fresh air fan is first controlled to increase, but the electric heating device is kept turned on. By heating the fresh air and increasing the fresh air temperature, the probability of condensation is reduced. At the same time, the speed of the fresh air fan is increased to ensure the user's demand for fresh air. When the increase in the fresh air temperature is obvious, the speed of the fresh air fan is further increased to further ensure the user's demand for fresh air. At the same time, the electric heating device is controlled to remain turned on to reduce the probability of condensation caused by the introduction of too much fresh air. When the fresh air temperature rises to a high enough level, the electric heating device is controlled to stop running, and the fresh air fan is controlled to run at the highest speed. This saves electricity. In this way, based on the degree of increase in the fresh air temperature, the electric heating device and / or the fresh air fan are controlled to run different schemes to make the fresh air temperature and fresh air volume appropriate, thereby improving the prevention effect of condensation.

[0084] Optionally, if the electric heating device has multiple heating gears, the gear of the electric heating device can be controlled to be lowered while the fan speed is increased. Specifically, the degree of reduction of the gear of the electric heating device is controlled to be less than the degree of increase of the speed of the fresh air fan. For example, if the speed of the fresh air fan increases by 50rad / 30s, the electric heating device is controlled to be reduced by one gear every 60s until the gear of the electric heating device is reduced to the lowest gear. In this way, the degree of reduction of the gear of the electric heating device is controlled to be less than the degree of increase of the speed of the fresh air fan, so as to prevent the generation of condensation due to the too fast reduction of the heating degree of the fresh air.

[0085] Optionally, if the electric heating device is reduced to the lowest gear, the speed of the fresh air fan is increased to the highest gear, and the fresh air temperature is within the sixth dew point temperature range, the electric heating device is controlled to be turned off.

[0086] Optionally, combined Figure 4 , the embodiment of the present disclosure provides another method for preventing condensation in an air conditioner, comprising:

[0087] S101, the processor determines the switch state of the fresh air fan and the indoor dew point temperature when the fresh air function of the air conditioner is turned on.

[0088] S102, the processor determines the current fresh air function stage according to the on / off state of the fresh air fan.

[0089] S103, the processor determines the change trend of the fresh air temperature in the current fresh air function stage.

[0090] S114: The processor determines a plurality of dew point temperature thresholds according to the indoor dew point temperature.

[0091] S144: When the fresh air temperature is less than the second dew point temperature threshold, the processor controls the electric heating device and the fresh air fan to be in a shutdown state.

[0092] S154, when the fresh air temperature is less than the second dew point temperature threshold, and the outdoor temperature rises and / or the indoor dew point temperature drops, the processor controls the electric heating device and the fresh air fan to start up.

[0093] Determine the indoor dew point temperature Then, according to the indoor dew point temperature Determine multiple dew point temperature thresholds. Optionally, based on the indoor dew point temperature, add different , thereby obtaining multiple dew point temperature thresholds. The dew point temperature threshold includes a second dew point temperature threshold. The second dew point temperature threshold is a fourth dew point temperature interval The lower limit of .

[0094] When the fresh air function is in the pause stage, it means that the fresh air was automatically shut down because the fresh air temperature was too low. During the pause stage of the fresh air function, if the fresh air temperature is less than the second dew point temperature threshold and the outdoor temperature and / or the indoor dew point temperature has not risen, the fresh air fan and the electric heating device are controlled to remain in the shutdown state. If the fresh air temperature is less than the second dew point temperature threshold, and the outdoor temperature rises and / or the indoor dew point temperature drops, it means that the condensation risk has been reduced due to changes in the outdoor environment and / or the indoor environment. At this time, the fresh air fan and the electric heating device are controlled to start. Specifically, the fresh air fan is controlled to run at the lowest speed, and the motor thermal device is controlled to run at the highest gear. That is, the amount of fresh air introduced is controlled to be minimum, and at the same time, the heating temperature of the fresh air is controlled to be the highest, so as to fully prevent the occurrence of condensation.

[0095] It should be noted that the specific implementation of steps S101, S102 and S103 can be found in the above embodiments and will not be described in detail here.

[0096] Optionally, .by 1℃, 3℃, 1.5℃, 2.5℃, Taking 3.5℃ as an example, the control of the fresh air fan and the electric heating device is shown in Table 1.

[0097] Table 1 Control of fresh air blower and electric heating device

[0098]

[0099] It can be seen from Table 1 that no matter when the fresh air temperature is decreasing or increasing, the fresh air fan and the electric heating device can be divided into four stages, namely: the first stage ( , ): The fresh air fan has the highest speed and the electric heating device is turned off; the second stage ( , ): The fresh air fan has the highest speed and the electric heating device is turned on; the third stage ( , ): The fresh air fan changes speed and the electric heating device changes gear; the fourth stage ( , And the outdoor temperature and indoor dew point temperature have not risen): the fresh air is turned off and the electric heating device is turned off. For the decreasing trend and the increasing trend, the lower limit of the dew point temperature interval at the same stage is less than the lower limit of the increasing trend (excluding the lower limit of the first dew point temperature interval and the fourth dew point temperature interval). ), and the upper limit of the decreasing trend is less than the upper limit of the increasing trend (excluding the upper limits of the third dew point temperature interval and the sixth dew point temperature interval). ). That is to say, at the same stage, the threshold value for allowing the fresh air fan and / or electric heating device to be regulated when the trend is decreasing is lower than the threshold value for allowing the fresh air fan and / or electric heating device to be regulated when the trend is increasing. This is because, when the fresh air temperature is on an upward trend, the fresh air fan must be turned on or even speeded up, and the electric heating device must be turned on or even downshifted, which will increase the risk of condensation. Therefore, at the same stage, the allowable regulation threshold for the rising trend is larger, which can ensure that when the fresh air temperature rises to a higher temperature, the next step of regulation is carried out to improve the effect of preventing condensation.

[0100] Combination Figure 5 As shown, in practical applications:

[0101] S501, the air conditioner operates in the fresh air function, and the fresh air fan runs at the highest speed;

[0102] S502, obtaining fresh air temperature, indoor temperature and indoor humidity;

[0103] S503, calculating the indoor dew point temperature according to the indoor temperature and indoor humidity ;

[0104] S504, compare fresh air temperature and indoor dew point temperature ; If the fresh air temperature is in the first dew point temperature range , then execute S505; if the fresh air temperature is within the second dew point temperature range , then execute S506; if the fresh air temperature is within the third dew point temperature range , then execute S507;

[0105] S505, controlling the fresh air fan to maintain the highest speed, and the electric heating device to operate at the lowest gear; then executing S504;

[0106] S506, controlling the fresh air fan to slow down at a first rate, and the electric heating device to shift up; then executing S504;

[0107] S507, control the fresh air fan and the electric heating device to shut down; then execute S508;

[0108] S508, detecting the outdoor temperature and / or calculating the indoor dew point temperature;

[0109] S509, determining whether the outdoor temperature rises and / or the indoor dew point temperature drops; if yes, executing S510; if no, executing S508;

[0110] S510, controls the fresh air fan to start and run at the minimum speed, and controls the electric heating device to start and run at the highest gear;

[0111] S511, compare fresh air temperature and indoor dew point temperature ; If the fresh air temperature is in the fourth dew point temperature range , then execute S512; if the fresh air temperature is within the fifth dew point temperature range , then execute S513; if the fresh air temperature is within the sixth dew point temperature range , then execute S514;

[0112] S512, controlling the fresh air fan to increase speed at a second rate, and the electric heating device to decrease speed; then executing S511;

[0113] S513, controlling the fresh air fan to increase its speed to the maximum speed, and keeping the electric heating device turned on; then executing S511;

[0114] S514, control the fresh air fan to maintain the highest speed and turn off the electric heating device; then execute S502.

[0115] It should be noted that the control logic when the fresh air temperature shows a downward trend is applicable not only when the fresh air function is just turned on, but also during the operation stage of the fresh air function; the control logic when the fresh air temperature shows an upward trend is applicable not only when the fresh air function is paused and restarted, but also during the operation stage of the fresh air function.

[0116] Combination Figure 6 As shown, an embodiment of the present disclosure provides a device for preventing condensation of an air conditioner, comprising: a first determination module 61, a second determination module 62, a third determination module 63 and a control module 64. The first determination module 61 is configured to determine the switch state of the fresh air fan and the indoor dew point temperature when the fresh air function of the air conditioner is turned on. The second determination module 62 is configured to determine the current fresh air function stage according to the switch state of the fresh air fan. The third determination module 63 is configured to determine the change trend of the fresh air temperature under the current fresh air function stage. The control module 64 is configured to control the operation of the electric heating device and / or the fresh air fan according to the change trend of the fresh air temperature and the indoor dew point temperature.

[0117] The device for preventing condensation in air conditioners provided by the embodiment of the present disclosure is used to determine the changing trend of the fresh air temperature under the current fresh air fan state based on the on / off state of the fresh air fan. The on / off state of the fresh air fan can characterize the stage of the fresh air function. When the fresh air fan is in different states, it will affect the generation of condensation. The changing trend of the fresh air temperature will also affect the generation of condensation. Therefore, based on the indoor dew point temperature and the changing trend of the fresh air temperature under the current fresh air function stage, the operation of the electric heating device and / or the fresh air fan is controlled, and the optimal operation scheme of the electric heating device and / or the fresh air fan under different conditions can be matched. Thereby improving the anti-condensation effect of the air conditioner.

[0118] Combination Figure 7 As shown, the embodiment of the present disclosure provides a device for preventing condensation in air conditioner, including a processor 70 and a memory 71. Optionally, the device may also include a communication interface 72 and a bus 73. The processor 70, the communication interface 72, and the memory 71 may communicate with each other through the bus 73. The communication interface 72 may be used for information transmission. The processor 70 may call the logic instructions in the memory 71 to execute the method for preventing condensation in air conditioner of the above embodiment.

[0119] In addition, the logic instructions in the above-mentioned memory 71 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0120] The memory 71 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 70 executes the function application and data processing by running the program instructions / modules stored in the memory 71, that is, the method for air conditioning anti-condensation in the above embodiment is implemented.

[0121] The memory 71 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 71 may include a high-speed random access memory and may also include a non-volatile memory.

[0122] An embodiment of the present disclosure provides an air conditioner, comprising the above-mentioned device for preventing condensation in an air conditioner.

[0123] An embodiment of the present disclosure provides a storage medium storing computer executable instructions, wherein the computer executable instructions are configured to execute the above-mentioned method for preventing condensation in an air conditioner.

[0124] The above-mentioned storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0125] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method or device including the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0126] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0127] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0128] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for preventing condensation in an air conditioner, the air conditioner comprising an outdoor fresh air duct, characterized in that: An electric heating device is provided at the air inlet of the outdoor fresh air duct, and the method comprises: When the fresh air function of the air conditioner is turned on, determine the switch status of the fresh air fan and the indoor dew point temperature; Determine the current fresh air function stage according to the on / off status of the fresh air fan; Determine the change trend of fresh air temperature in the current fresh air function stage; Control the operation of the electric heating device and / or the fresh air fan according to the changing trend of the fresh air temperature and the indoor dew point temperature; According to the change trend of the fresh air temperature and the indoor dew point temperature, the operation of the electric heating device and / or the fresh air fan is controlled, including: when the current fresh air function is in the operation stage, according to the indoor dew point temperature, multiple dew point temperature thresholds are determined, the multiple dew point temperature thresholds form multiple continuous dew point temperature intervals, and the first dew point temperature threshold is the upper limit value of the first dew point temperature interval; when the fresh air temperature is less than the first dew point temperature threshold and the change trend of the fresh air temperature is the first trend, the fresh air fan and / or the electric heating device is controlled to operate according to the first preset plan; the first trend is a decreasing trend; The first preset scheme includes: when the fresh air temperature is within the first dew point temperature range, the electric heating device is controlled to turn on; when it drops below the lower limit of the first dew point temperature range, the smaller the dew point temperature range the fresh air temperature is in, the lower the speed of the fresh air fan is controlled; when the fresh air temperature is within the second dew point temperature range, the fresh air fan is controlled to reduce the speed at a first rate; when the fresh air temperature is within the third dew point temperature range and remains for a preset time, the fresh air fan is controlled to turn off; wherein, the second dew point temperature range is smaller than the first dew point temperature range, and larger than the third dew point temperature range.

2. The method according to claim 1, characterized in that Determining the current fresh air function stage according to the on / off state of the fresh air fan includes: When the fresh air fan is in the on state, the current fresh air function stage is determined to be the operation stage; When the fresh air fan is in the off state, it is determined that the current fresh air function stage is a pause stage.

3. The method according to claim 2, characterized in that The current fresh air function is in the operation stage; the operation of the electric heating device and / or the fresh air fan is controlled according to the change trend of the fresh air temperature and the indoor dew point temperature, and further includes: When the fresh air temperature is less than the first dew point temperature threshold and the change trend of the fresh air temperature is the second trend, the fresh air fan and / or the electric heating device are controlled to operate according to the second preset scheme.

4. The method according to claim 1, characterized in that: While reducing the speed of the fresh air fan, the gear of the electric heating device is controlled to increase.

5. The method according to claim 4, characterized in that If the electric heating device is raised to the highest gear, the speed of the fresh air fan is reduced to the lowest gear, and the fresh air temperature remains within the third dew point temperature range for a preset period of time, the fresh air fan and the electric heating device are controlled to be turned off.

6. The method according to claim 3, characterized in that The second trend is an increasing trend; the controlling the fresh air fan and / or the electric heating device to operate according to the second preset scheme includes: Determine an operation scheme of the fresh air fan and / or the electric heating device corresponding to the current fresh air temperature according to a second association relationship between the fresh air temperature and the operation scheme of the fresh air fan and / or the electric heating device; Control the fresh air fan and / or electric heating device to operate according to the determined operation plan.

7. According to the method of claim 6, the second correlation relationship between the fresh air temperature and the operation scheme of the fresh air blower and / or the electric heating device includes: When the fresh air temperature is within the fourth dew point temperature range, the fresh air fan speed is increased and the electric heating device is kept turned on; When the fresh air temperature is within the fifth dew point temperature range, the fresh air fan speed is controlled to increase to the initial speed; When the fresh air temperature is within the sixth dew point temperature range, the electric heating device is controlled to shut down; The fifth dew point temperature interval is smaller than the sixth dew point temperature interval, and larger than the fourth dew point temperature interval.

8. The method according to claim 7, characterized in that If the electric heating device is reduced to the lowest gear, the speed of the fresh air fan is increased to the highest gear, and the fresh air temperature is within the sixth dew point temperature range, the electric heating device is controlled to be turned off.

9. The method according to claim 7, characterized in that: The current fresh air function is in the pause stage; the operation of the electric heating device and / or the fresh air fan is controlled according to the change trend of the fresh air temperature and the indoor dew point temperature, including: When the fresh air temperature is less than the second dew point temperature threshold, the electric heating device and the fresh air fan are controlled to be in a shutdown state; the second dew point temperature threshold is the lower limit value of the fourth dew point temperature range; When the fresh air temperature is less than the second dew point temperature threshold, and the outdoor temperature rises and / or the indoor dew point temperature drops, the electric heating device and the fresh air fan are controlled to start up.

10. The method according to any one of claims 1 to 9, characterized in that Determining the indoor dew point temperature includes: Get indoor temperature and indoor humidity; Determine the indoor dew point temperature based on the indoor temperature and indoor humidity.

11. A device for preventing condensation in an air conditioner, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for preventing condensation in an air conditioner according to any one of claims 1 to 10 when running the program instructions.

12. An air conditioner, characterized in that: It comprises the device for preventing condensation in air conditioner as claimed in claim 11.

13. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the method for preventing condensation in an air conditioner according to any one of claims 1 to 10 is executed.

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