Control method for preventing cold air of air conditioner and air conditioner

Abstract

The present application relates to air conditioning technical field, specifically provide a kind of air conditioner anti-cold wind control method and air conditioner, it is aimed at solving the problem that existing air conditioner is in anti-cold wind protection state when heating mode is opened, indoor fan stops, needs to wait indoor coil temperature reaches set value before starting to blow, waiting time is long, influence user experience effect.For this purpose, the control method of the present application comprises: in the case where air conditioner is in heating mode, based on the size of temperature difference value, indoor environment temperature, outdoor environment temperature and inner coil temperature, judge whether the heating device is started or not;After the first preset time of heating device starts, judge whether indoor fan is in the open state, if indoor fan is in the unopened state, control indoor fan to open.The present application opens indoor fan after the first preset time of heating device is set to start, shortens the anti-cold wind time of air conditioner, improves user experience effect.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically providing a control method for preventing cold air from entering an air conditioner and an air conditioner. Background Technology

[0002] Air conditioner anti-cold air function is a protective feature primarily designed for use in winter. In winter, when temperatures are low, turning on an air conditioner often results in a sudden blast of cold air, creating a chilling sensation. With the anti-cold air function, the air conditioner doesn't immediately blow cold air; it waits until the internal temperature is close to body temperature before activating the anti-cold air function, ensuring that the air blown out is warm and more comfortable.

[0003] In existing air conditioners, the temperature of the indoor coil is detected within a certain period of time. When it falls below a certain set value, the air conditioner enters the cold air protection mode and stops blowing air. The indoor unit will only start blowing air after the temperature of the indoor coil reaches the set value. After the air conditioner is turned on in heating mode, it cannot blow out hot air quickly, resulting in a long waiting time and affecting the user experience.

[0004] Therefore, the present invention needs to provide a new method for controlling cold air in an air conditioner and an air conditioner to solve the above-mentioned technical problems. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that when the existing air conditioner is in the anti-cold air protection state after turning on the heating mode, the indoor fan is in a stopped state and it needs to wait for the indoor coil temperature to reach the set value before the indoor fan will start blowing air. The air conditioner cannot blow out hot air quickly, the waiting time is long, and the user experience is affected.

[0006] To this end, in a first aspect, the present invention provides a method for controlling cold air prevention in an air conditioner, the air conditioner including an indoor heat exchanger, an indoor fan, and a heating device, the heating device being disposed between the indoor fan and the indoor heat exchanger, the heating device being capable of heating the air before it enters the indoor heat exchanger, the control method comprising:

[0007] When the air conditioner is in heating mode, it acquires the indoor ambient temperature, outdoor ambient temperature, user-set temperature, and the temperature of the indoor heat exchanger's inner coil.

[0008] Obtain the temperature difference between the user-set temperature and the indoor ambient temperature;

[0009] Based on the temperature difference, indoor ambient temperature, outdoor ambient temperature, and the temperature of the inner coil, determine whether to start the heating device.

[0010] After the heating device has been started for a first preset time, it is determined whether the indoor fan is in the on state. If the indoor fan is not in the on state, the indoor fan is controlled to be turned on.

[0011] When the above technical solution is adopted, the heating device can heat the air before it enters the indoor heat exchanger when it is turned on, so that the temperature of the air entering the indoor heat exchanger is increased. This not only allows for heat exchange with the inner coil, which helps to increase the temperature of the refrigerant in the inner coil and accelerates the temperature rise of the refrigerant, but also the temperature of the warm air heated by the heating device after heat exchange with the refrigerant is higher than the indoor ambient temperature. Therefore, after the heating device starts for a first preset time, the indoor fan is turned on, thereby shortening the indoor fan shutdown time, that is, shortening the waiting time and improving the user experience.

[0012] In a specific implementation of the above-mentioned air conditioner anti-cold air control method, the step of "determining whether to control the heating device to start based on the temperature difference, indoor ambient temperature, outdoor ambient temperature, and indoor coil temperature" specifically includes:

[0013] If the temperature difference is greater than a preset difference, the indoor ambient temperature is less than a first preset temperature, the outdoor ambient temperature is less than a second preset temperature, and the inner coil temperature is less than a third preset temperature, then the heating device is controlled to start.

[0014] In a specific embodiment of the above-mentioned air conditioner anti-cold air control method, the control method further includes:

[0015] When the heating device is in the start state, the system determines whether to switch the heating device from the start state to the off state based on at least one of the following: the air conditioner operating mode, the indoor fan operating state, the temperature difference, the indoor ambient temperature, the outdoor ambient temperature, and the indoor coil temperature.

[0016] In a specific implementation of the above-mentioned air conditioner anti-cold air control method, the step of "determining whether to control the heating device to switch from the start to the off state based on at least one of the air conditioner operating mode, the indoor fan operating status, the temperature difference, the indoor ambient temperature, the outdoor ambient temperature, and the indoor coil temperature" specifically includes:

[0017] If the air conditioner's operating mode is switched to non-heating mode or off mode, the heating device is controlled to switch from on to off state; and / or

[0018] If the indoor fan is in the off state, the heating device is switched from the on state to the off state.

[0019] When the above technical solution is adopted, the air conditioner operates in non-heating mode or is turned off. At this time, the air conditioner does not need to enter the anti-cold air protection mode, so the heating device is in the off state. Moreover, when the indoor fan is in the off state, it is impossible to blow air to the indoor heat exchanger through the heating device, so there is no need to turn on the heating device to avoid waste.

[0020] In a specific implementation of the above-mentioned air conditioner anti-cold air control method, the step of "determining whether to control the heating device to switch from the start to the off state based on at least one of the air conditioner operating mode, the indoor fan operating status, the temperature difference, the indoor ambient temperature, the outdoor ambient temperature, and the indoor coil temperature" further includes:

[0021] If the temperature difference is less than a preset difference, the heating device is controlled to switch from the start state to the off state; and / or

[0022] If the indoor ambient temperature is greater than the fourth preset temperature, the heating device is controlled to switch from the start state to the off state; and / or

[0023] If the outdoor ambient temperature is greater than the fifth preset temperature, the heating device is controlled to switch from the start state to the off state; and / or

[0024] If the temperature of the inner coil is greater than the sixth preset temperature, the heating device is switched from the start state to the off state.

[0025] In a specific embodiment of the above-mentioned air conditioner anti-cold air control method, the control method further includes:

[0026] When the heating device is in the start state, determine whether a shutdown command to shut down the heating device has been received;

[0027] If a shutdown command is received, the control of the heating device will switch from the start state to the shutdown state.

[0028] In a specific implementation of the above-mentioned air conditioner anti-cold air control method, the air conditioner includes a compressor. When the air conditioner is started and in heating mode, the running time of the compressor is obtained. After the running time reaches a second preset time, the temperature of the inner coil of the indoor heat exchanger is obtained.

[0029] When the above technical solution is adopted, the compressor runs for a second preset time before acquiring the temperature of the inner coil when entering the heating mode. At this time, the temperature of the inner coil has increased compared with the temperature when the heating mode is first entered. If the temperature of the inner coil acquired at this time is greater than the third preset temperature, the heating device will not be turned on, which reduces the frequency of the heating device being turned on and helps to save resources.

[0030] In a specific embodiment of the above-mentioned air conditioner anti-cold air control method, the heating device includes an electromagnetic heating coil and a heat exchange pipeline. The electromagnetic heating coil is wound on the heat exchange pipeline, and the heat exchange pipeline is arranged between the indoor fan and the indoor heat exchanger.

[0031] In a specific implementation of the above-mentioned air conditioner anti-cold air control method, the first preset time is 5s to 30s; and / or.

[0032] The second preset time is 30s to 90s.

[0033] In a second aspect, the present invention also provides an air conditioner, including a controller, the controller being capable of executing the air conditioner anti-cold air control method as described in any of the above technical solutions. Attached Figure Description

[0034] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0035] Figure 1 This is a flowchart of the main steps of the air conditioner anti-cold air control method provided by the present invention;

[0036] Figure 2 This is a detailed flowchart of the control method for preventing cold air in an air conditioner provided by the present invention. Detailed Implementation

[0037] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0038] It should be noted that in the description of this invention, terms such as "upper," "lower," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the relevant devices or elements must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, ordinal numbers such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] When an existing air conditioner is in heating mode and is in anti-cold air protection mode, the indoor fan is stopped. It needs to wait for the indoor coil temperature to reach the set value before the indoor fan will start blowing air. The air conditioner cannot blow out hot air quickly, and the waiting time is long, which affects the user experience.

[0041] To solve the above-mentioned technical problems, the present invention provides an air conditioner, which includes an indoor unit and an outdoor unit. The indoor unit includes an indoor heat exchanger, an indoor fan, and a heating device. The outdoor unit includes a compressor. The heating device is disposed between the indoor fan and the indoor heat exchanger, and the heating device can heat the air before it enters the indoor heat exchanger.

[0042] Specifically, the indoor unit includes an indoor unit casing, an indoor heat exchanger, an indoor fan, and a heating device, all installed inside the casing. The heating device includes an electromagnetic heating coil and heat exchange piping. The electromagnetic heating coil is wound around the heat exchange piping, which is located within the indoor unit casing between the indoor fan and the indoor heat exchanger. When energized, the electromagnetic heating coil heats the heat exchange piping, allowing the air passing through the piping to exchange heat with it, thus raising the air temperature before it enters the indoor heat exchanger. The heat exchange piping can be, but is not limited to, copper pipes.

[0043] Additionally, see Figure 1 This invention provides a control method for preventing cold air from entering an air conditioner, the control method comprising:

[0044] S1, when the air conditioner is in heating mode, acquires the indoor ambient temperature, outdoor ambient temperature, user-set temperature and the temperature of the indoor heat exchanger's inner coil.

[0045] S2, obtain the temperature difference between the user-set temperature and the indoor ambient temperature;

[0046] S3 determines whether to start the heating device based on the temperature difference, indoor ambient temperature, outdoor ambient temperature, and the temperature of the inner coil.

[0047] S4. After the heating device starts for a first preset time, determine whether the indoor fan is on. If the indoor fan is not on, control the indoor fan to turn on.

[0048] The user-set temperature refers to the temperature at which the user wants to raise the indoor temperature to their desired level. The user-set temperature can be configured via remote control and received by the air conditioner's controller.

[0049] In the above embodiments, if the temperature difference is larger, it indicates that the indoor ambient temperature is lower, that is, the temperature of the inner coil will also be lower. When the air conditioner enters the heating mode, it is easy to enter the anti-cold air protection state. These factors serve as conditions for judging the heating device, thus improving the accuracy of the judgment.

[0050] In step S4, after the heating device starts for a first preset time, the indoor fan is turned on. When the indoor fan blows air, the air is first heated by the heating device to form warm air. This warm air then enters the indoor heat exchanger. Because the warm air entering the heat exchanger is at a high temperature, it exchanges heat with the refrigerant in the indoor coil, raising the refrigerant temperature and shortening the air conditioner's anti-cold air protection time. Furthermore, the warm air after heat exchange is still warmer than the indoor ambient temperature, providing comfortable warm air for the user. Blowing this warm air into the room also helps raise the indoor ambient temperature, preventing user discomfort from cold air and shortening waiting time, thus improving the user experience. Therefore, it should be noted that although the temperature of the warm air generated by the heating device is sufficient for heat exchange with the indoor heat exchanger, the temperature decreases after heat exchange, but the warm air blown out of the indoor heat exchanger into the indoor environment is still perceived as warm air by the user.

[0051] In one embodiment, the first preset time is 5s to 30s. For example, the first preset time is 5s or 10s.

[0052] It should be noted that this application does not impose specific limitations on the value of the first preset time. The design can be flexibly made according to the actual use without deviating from the basic principles of the present invention.

[0053] In one embodiment, the step of "determining whether to start the heating device based on the temperature difference, indoor ambient temperature, outdoor ambient temperature, and the temperature of the inner coil" specifically includes:

[0054] If the temperature difference is greater than the preset difference, the indoor ambient temperature is less than the first preset temperature, the outdoor ambient temperature is less than the second preset temperature, and the inner coil temperature is less than the third preset temperature, then the heating device will be activated.

[0055] In the above embodiments, the conditions for the heating device to start are that the temperature difference is greater than a preset difference, the indoor ambient temperature is less than a first preset temperature, the outdoor ambient temperature is less than a second preset temperature, and the indoor coil temperature is less than a third preset temperature. If any of the above conditions are not met, the heating device will not start; that is, when entering heating mode, the heating device itself is in a closed state, and if any condition is not met, the heating device will not start. It should be noted that the conditions for the heating device not to start are different from the conditions for the heating device to switch from a started to a closed state as described below.

[0056] It should be noted that this application does not impose specific limitations on the values ​​of the preset difference, the first preset temperature, the second preset temperature, and the third preset temperature. These values ​​can be flexibly designed according to actual usage needs without departing from the basic principles of this invention. For example, the preset difference is 1℃, the first preset temperature is 15℃, the second preset temperature is 10℃, and the third preset temperature is 30℃.

[0057] In one embodiment, the control method further includes:

[0058] S5, when the heating device is in the start state, determine whether to control the heating device to switch from the start state to the off state based on at least one of the following: air conditioner operating mode, indoor fan operating status, temperature difference, indoor ambient temperature, outdoor ambient temperature, and indoor coil temperature.

[0059] In one embodiment, step S5, "determining whether to switch the heating device from the start state to the off state based on at least one of the air conditioner operating mode, indoor fan operating status, temperature difference, indoor ambient temperature, outdoor ambient temperature, and indoor coil temperature," specifically includes:

[0060] S51, if the air conditioner's operating mode is switched to non-heating mode or off mode, the control of the heating device is switched from the start state to the off state;

[0061] Alternatively, S52, if the indoor fan is in the off state, the heating device is switched from the on state to the off state.

[0062] Alternatively, if the air conditioner's operating mode is switched to non-heating mode or off mode, and the indoor fan is in the off state, the heating device is switched from on to off.

[0063] In the above embodiments, the air conditioner operates in non-heating mode or is turned off. At this time, the air conditioner does not need to enter the anti-cold air protection mode, so the heating device is in the off state. Moreover, when the indoor fan is in the off state, it is impossible to blow air to the indoor heat exchanger through the heating device, so there is no need to turn on the heating device to avoid waste.

[0064] In one embodiment, step S5, which "determines whether to switch the heating device from the start state to the off state based on at least one of the air conditioner operating mode, indoor fan operating status, temperature difference, indoor ambient temperature, outdoor ambient temperature, and indoor coil temperature," further includes:

[0065] S53, if the temperature difference is less than the preset difference, the heating device is switched from the start state to the off state.

[0066] Alternatively, S54, if the indoor ambient temperature is greater than the fourth preset temperature, the heating device is switched from the start state to the off state.

[0067] Alternatively, S55, if the outdoor ambient temperature is greater than the fifth preset temperature, the heating device is switched from the start state to the off state.

[0068] Alternatively, S56, if the temperature of the inner coil is greater than the sixth preset temperature, the heating device is switched from the start state to the off state.

[0069] It should be noted that controlling the heating device to switch from the start-up state to the off state when at least two conditions in the above embodiments are met is also within the scope of protection of this application. For example, if the temperature difference is less than a preset difference and the indoor ambient temperature is greater than a fourth preset temperature, then the heating device is controlled to switch from the start-up state to the off state. For example, if the indoor ambient temperature is greater than a fourth preset temperature and the inner coil temperature is greater than a sixth preset temperature, then the heating device is controlled to switch from the start-up state to the off state.

[0070] Furthermore, this application does not specifically limit the values ​​of the preset difference, the fourth preset temperature, the fifth preset temperature, and the sixth preset temperature. These values ​​can be flexibly designed according to actual usage needs without departing from the basic principles of this invention. For example, the preset difference is 1℃, the fourth preset temperature is 17℃, the fifth preset temperature is 12℃, and the sixth preset temperature is 45℃.

[0071] In one embodiment, the control method further includes:

[0072] When the heating device is in the start state, determine whether a shutdown command to shut down the heating device has been received;

[0073] If a shutdown command is received, the control of the heating device will switch from the start state to the shutdown state.

[0074] In one embodiment, when the air conditioner is started and in heating mode, the compressor's running time is obtained, and the temperature of the indoor heat exchanger's inner coil is obtained after the running time reaches a second preset time.

[0075] In the above embodiment, when entering the heating mode, the compressor runs for a second preset time before acquiring the inner coil temperature. At this time, the inner coil temperature has increased compared to the temperature when the heating mode is first entered. If the inner coil temperature acquired at this time is greater than the third preset temperature, the heating device will not be turned on, which reduces the frequency of the heating device being turned on and helps to save resources.

[0076] In one embodiment, the second preset time is 30s to 90s. For example, the second preset time is 35s or 40s. It should be noted that this application does not specifically limit the value of the second preset time; it can be flexibly designed according to actual usage needs without departing from the basic principles of the invention.

[0077] In addition, the present invention also provides an air conditioner, including a controller, which is capable of executing the air conditioner anti-cold air control method described in any of the above technical solutions.

[0078] In the various embodiments and extended implementations described above, the heating device, when in operation, heats the air before it enters the indoor heat exchanger, raising the temperature of the air entering the heat exchanger. This not only facilitates heat exchange with the inner coil, increasing the temperature of the refrigerant within the coil and accelerating its temperature rise, but also results in warm air with a higher temperature relative to the indoor environment after heat exchange with the refrigerant. Therefore, after the heating device starts for a first preset time, the indoor fan is activated, shortening the fan's downtime and reducing waiting time. This achieves rapid heating, improves user experience, and reduces the impact of excessive compressor load under cold air protection.

[0079] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A control method for preventing cold air of an air conditioner, characterized by, The air conditioner comprises an indoor heat exchanger, an indoor fan and a heating device, the heating device is arranged between the indoor fan and the indoor heat exchanger, the heating device can heat the air before entering the indoor heat exchanger, and the control method comprises: In the case that the air conditioner is in a heating mode, the indoor environment temperature, the outdoor environment temperature, the user set temperature and the inner coil temperature of the indoor heat exchanger are acquired; The temperature difference between the user set temperature and the indoor environment temperature is acquired; Based on the temperature difference, the indoor environment temperature, the outdoor environment temperature and the size of the inner coil temperature, it is judged whether to control the heating device to start; After the heating device starts for a first preset time, it is judged whether the indoor fan is in an open state, if the indoor fan is in a non-open state, the indoor fan is controlled to open; The step of "judging whether to control the heating device to start based on the temperature difference, the indoor environment temperature, the outdoor environment temperature and the size of the inner coil temperature" specifically comprises: If the temperature difference is greater than a preset difference, the indoor environment temperature is less than a first preset temperature, the outdoor environment temperature is less than a second preset temperature and the inner coil temperature is less than a third preset temperature, the heating device is controlled to start.

2. The control method of claim 1, wherein, The control method further comprises: In the case that the heating device is in a starting state, at least one of the air conditioner operation mode, the indoor fan operation state, the temperature difference, the indoor environment temperature, the outdoor environment temperature and the size of the inner coil temperature is used to judge whether to control the heating device to switch from starting to closing.

3. The control method of claim 2, wherein, The step of "judging whether to control the heating device to switch from starting to closing according to at least one of the air conditioner operation mode, the indoor fan operation state, the temperature difference, the indoor environment temperature, the outdoor environment temperature and the size of the inner coil temperature" specifically comprises: If the operation mode of the air conditioner is converted to a non-heating mode or a shutdown mode, the heating device is controlled to switch from starting to closing; and / or If the operation state of the indoor fan is in a closing state, the heating device is controlled to switch from starting to closing.

4. The control method of claim 2, wherein, The step of "judging whether to control the heating device to switch from starting to closing according to at least one of the air conditioner operation mode, the indoor fan operation state, the temperature difference, the indoor environment temperature, the outdoor environment temperature and the size of the inner coil temperature" specifically further comprises: If the temperature difference is less than a preset difference, the heating device is controlled to switch from starting to closing; and / or If the indoor environment temperature is greater than a fourth preset temperature, the heating device is controlled to switch from starting to closing; and / or If the outdoor environment temperature is greater than a fifth preset temperature, the heating device is controlled to switch from starting to closing; and / or If the inner coil temperature is greater than a sixth preset temperature, the heating device is controlled to switch from starting to closing.

5. The control method of claim 2, wherein the control method further comprises: The control method further comprises: When the heating device is in the starting state, it is judged whether a closing instruction for closing the heating device is received; If the closing instruction is received, the heating device is controlled to switch from the starting to the closing state.

6. The control method of claim 1, wherein, The air conditioner comprises a compressor, and when the air conditioner is started and in a heating mode, an operation time of the compressor is acquired, and after the operation time reaches a second preset time, an indoor coil temperature of an indoor heat exchanger is acquired.

7. The control method of claim 1, wherein the control method further comprises: The heating device comprises an electromagnetic heating coil and a heat exchange pipeline, the electromagnetic heating coil is wound on the heat exchange pipeline, and the heat exchange pipeline is arranged between the indoor fan and the indoor heat exchanger.

8. The control method of claim 6, wherein the control method further comprises: The first preset time is 5s-30s; and / or The second preset time is 30s-90s.

9. An air conditioner characterized by comprising: The air conditioner comprises a controller capable of executing the air conditioner cold wind prevention control method according to any one of claims 1-8.

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