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

Abstract

The invention relates to the technical field of air conditioners, in particular to an air conditioner cold air prevention control method and an air conditioner, and aims to solve the problems that when an existing air conditioner is in a cold air prevention protection state after a heating mode is started, an indoor fan stops, blowing is started only after the temperature of an indoor coil reaches a set value, the waiting time is long, and the cost is high. And the user experience effect is influenced. In order to achieve the purpose, the control method comprises the steps that under the condition that the air conditioner is in a heating mode, whether a heating device is controlled to be started or not is judged based on the temperature difference value, the indoor environment temperature, the outdoor environment temperature and the inner coil pipe temperature; and after the heating device is started for a first preset time, whether the indoor fan is in a starting state or not is judged, and if the indoor fan is not in the starting state, the indoor fan is controlled to be started. After the heating device is started for the first preset time, the indoor fan is started, the cold air prevention time of the air conditioner is shortened, and the user experience effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular provides a control method for preventing cold wind of an air conditioner and an air conditioner. Background Art

[0002] The air conditioner's cold wind protection function is a protective function, mainly for the use of air conditioners in winter. In winter, when the temperature is low, the air conditioner will suddenly blow out cold wind after it is turned on, giving people a refreshing feeling. With the cold wind protection function, the air conditioner will not blow air immediately after it is turned on. It will wait until the internal temperature of the air conditioner is similar to the human body temperature before it starts. In this way, the wind blown out is warm wind, which is more comfortable.

[0003] The air conditioner in the prior art detects the temperature value of the indoor coil within a certain period of time. When it is lower than a certain set value, it enters the anti-cold wind protection mode and the indoor unit stops blowing air. It is necessary to wait for the indoor coil temperature to reach the set value before the indoor unit starts to blow air. After the air conditioner turns on the heating mode, hot air cannot be blown out quickly, and the waiting time is long, which affects the user experience.

[0004] Therefore, the present invention needs to provide a new control method for preventing cold wind of an air conditioner and an air conditioner to solve the above technical problems. Summary of the invention

[0005] The present invention aims to solve the above technical problem, that is, to solve the problem that when the existing air conditioner is turned on in the heating mode and is in the cold wind protection state, the indoor fan is in the air-stop state, and the indoor fan will not start to blow air until the indoor coil temperature reaches the set value. The air conditioner cannot blow out hot air quickly, and the waiting time is long, which affects the user experience.

[0006] To this end, in a first aspect, the present invention provides a control method for preventing cold wind in an air conditioner, wherein the air conditioner comprises an indoor heat exchanger, an indoor fan and a heating device, wherein the heating device is arranged between the indoor fan and the indoor heat exchanger, and the heating device can heat the wind before entering the indoor heat exchanger, and the control method comprises:

[0007] When the air conditioner is in heating mode, obtain the indoor ambient temperature, outdoor ambient temperature, user set temperature and the inner coil temperature of the indoor heat exchanger;

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

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

[0010] After the heating device is started for a first preset time, it is determined whether the indoor fan is in an on state, and if the indoor fan is in an off state, the indoor fan is controlled to be turned on.

[0011] When the above technical solution is adopted, the heating device can heat the wind before entering the indoor heat exchanger through the heating device when it is turned on, so that the temperature of the wind entering the indoor heat exchanger increases. It can not only exchange heat with the inner coil, which is beneficial to increase the temperature of the refrigerant in the inner coil and accelerate 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 is started for the first preset time, the indoor fan is turned on, thereby shortening the indoor fan stop time, that is, shortening the waiting time and improving the user experience.

[0012] In the specific implementation of the above-mentioned air conditioner cold wind prevention control method, the step of "determining whether to control the heating device to start based on the temperature difference, the indoor ambient temperature, the outdoor ambient temperature and the inner 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, the heating device is controlled to start.

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

[0015] When the heating device is in the started state, it is determined whether to control the heating device to switch from the started state to the off state based on at least one of the air conditioner operation mode, the indoor fan operation state, the temperature difference, the indoor ambient temperature, the outdoor ambient temperature and the inner coil temperature.

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

[0017] If the operation mode of the air conditioner is converted to a non-heating mode or an off mode, the heating device is controlled to switch from an on state to an off state; and / or

[0018] If the operating state of the indoor fan is in the off state, the heating device is controlled to switch from the on state to the off state.

[0019] When the above technical solution is adopted, the operating mode of the air conditioner is non-heating or shut down. At this time, the air conditioner does not need to enter the cold wind protection mode, so the heating device is in the off state; and when the indoor fan is in the off state, the wind cannot be blown 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 cold wind prevention control method, the step of "determining whether to control the heating device to switch from the start state to the off state according to at least one of the air conditioner operation mode, the indoor fan operation state, the temperature difference value, the indoor ambient temperature, the outdoor ambient temperature and the inner coil temperature" specifically includes:

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

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

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

[0024] If the inner coil temperature is greater than a sixth preset temperature, the heating device is controlled to switch from an on state to an off state.

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

[0026] When the heating device is in the started state, determining whether a shutdown instruction to shut down the heating device is received;

[0027] If a shutdown command is received, the heating device is controlled to switch from an on state to an off state.

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

[0029] When the above technical solution is adopted, when entering the heating mode, the inner coil temperature is obtained after the compressor runs for the second preset time. At this time, the inner coil temperature is higher than the temperature when the heating mode is just entered. If the inner coil temperature obtained at this time is greater than the third preset temperature, the heating device will not be turned on, which reduces the frequency of turning on the heating device and is beneficial to saving resources.

[0030] In a specific implementation of the above-mentioned air conditioner cold wind prevention control method, the heating device includes an electromagnetic heating coil and a heat exchange pipeline, the electromagnetic heating coil is wound around 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 cold wind prevention 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 further provides an air conditioner, comprising a controller, wherein the controller is capable of executing the air conditioner cold wind prevention control method as described in any one of the above technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0035] Figure 1 It is a flow chart of the main steps of the control method for preventing cold wind of an air conditioner provided by the present invention;

[0036] Figure 2 It is a detailed step flow chart of the control method for preventing cold wind of an air conditioner provided by the present invention. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not used to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0038] It should be noted that in the description of the present invention, the terms "upper", "lower", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the relevant devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, ordinal numbers "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] When the existing air conditioner is in the anti-cold wind protection state after turning on the heating mode, the indoor fan is in the stopped state. It is necessary to wait until the indoor coil temperature reaches the set value before the indoor fan starts to blow air. The air conditioner cannot blow out hot air quickly, and the waiting time is long, which affects the user experience.

[0041] In order to solve the above 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, and the heating device is arranged between the indoor fan and the indoor heat exchanger. The heating device can heat the wind before entering the indoor heat exchanger.

[0042] Specifically, the indoor unit includes an indoor chassis, an indoor heat exchanger, an indoor fan and a heating device are all installed in the indoor chassis, and 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 in the indoor chassis between the indoor fan and the indoor heat exchanger. When the electromagnetic heating coil is powered on, it heats the heat exchange pipeline, so that the wind passing through the heat exchange pipeline exchanges heat with it, and the temperature of the wind is increased before entering the indoor heat exchanger. The heat exchange pipeline can be, but is not limited to, a copper tube.

[0043] Also, see Figure 1 The present invention provides a control method for preventing cold wind of an air conditioner, the control method comprising:

[0044] S1, when the air conditioner is in heating mode, obtaining the indoor ambient temperature, the outdoor ambient temperature, the user set temperature and the inner coil temperature of the indoor heat exchanger;

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

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

[0047] S4, after the heating device is started for a first preset time, determine whether the indoor fan is in an on state, and if the indoor fan is not in an off state, control the indoor fan to be turned on.

[0048] The user-set temperature refers to the temperature that the user needs to raise the indoor environment temperature to a desired temperature. The user-set temperature can be set by a remote controller and received by the controller of the air conditioner.

[0049] In the above embodiment, if the temperature difference value is larger, it means 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 cold wind protection state. These factors are used as conditions for judging the heating device, which improves the judgment accuracy.

[0050] In step S4, after the heating device is started for the first preset time, the indoor fan is in the on state, so that when the indoor fan blows air, the wind is first heated by the heating device to form warm air, and the warm air then enters the indoor heat exchanger. Since the temperature of the warm air entering the indoor heat exchanger is high, it exchanges heat with the refrigerant in the inner coil, so that the temperature of the refrigerant increases, thereby shortening the cold wind protection time of the air conditioner. Moreover, the warm air after the heat exchange is also higher than the indoor ambient temperature, and it is still comfortable warm air for the user. Blowing indoors also helps to increase the indoor ambient temperature, avoiding the user from feeling uncomfortable due to the blowing of cold air, shortening the waiting time, and improving the user experience. Therefore, it should be noted that after the temperature of the warm air formed by the heating device in the present application is sufficient to exchange heat with the indoor heat exchanger, although the temperature of the warm air is reduced after the heat exchange, the warm air blown out from the indoor heat exchanger into the indoor environment is still the warm air perceived by the user.

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

[0052] It should be noted that the present application does not make any specific limitation on the specific value of the first preset time, and it can be flexibly designed according to actual usage without deviating from the basic principles of the present invention.

[0053] In one embodiment, the step of “determining whether to control the heating device to start based on the temperature difference, the indoor ambient temperature, the 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, the heating device is controlled to start.

[0055] In the above embodiment, the conditions for starting the heating device need to simultaneously meet the following conditions: 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 internal coil temperature is less than the third preset temperature. If any of the above conditions is not met, the heating device will not start, that is, when entering the heating mode, the heating device itself is in the off state. At this time, if any of the conditions is not met, the heating device will not start. It should be noted that the conditions for not starting the heating device are different from the conditions for switching the heating device from the on state to the off state described below.

[0056] It should be noted that the specific values ​​of the preset difference, the first preset temperature, the second preset temperature and the third preset temperature are not specifically limited in this application, and are flexibly designed according to actual use requirements without deviating from the basic principles of the present invention. For example, the preset difference is 1°C, the first preset temperature is 15°C, the second preset temperature is 10°C, and the third preset temperature is 30°C.

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

[0058] S5, when the heating device is in the started state, determine whether to control the heating device to switch from the started state to the off state according to at least one of the air conditioner operation mode, the indoor fan operation state, the temperature difference, the indoor ambient temperature, the outdoor ambient temperature and the inner coil temperature.

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

[0060] S51, if the operation mode of the air conditioner is converted to a non-heating mode or an off mode, the heating device is controlled to switch from an on state to an off state;

[0061] Alternatively, S52, if the operation state of the indoor fan is in the off state, the heating device is controlled to switch from the on state to the off state;

[0062] Alternatively, if the operation mode of the air conditioner is converted to a non-heating mode or an off mode, and if the operation state of the indoor fan is in an off state, the heating device is controlled to switch from an on state to an off state.

[0063] In the above embodiment, the operation mode of the air conditioner is non-heating or shut down. At this time, the air conditioner does not need to enter the cold wind protection mode, so the heating device is in the off state; and when the indoor fan is in the off state, the wind cannot be blown 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 of "determining whether to control the heating device to switch from the on state to the off state according to at least one of the air conditioner operation mode, the indoor fan operation state, the temperature difference, the indoor ambient temperature, the outdoor ambient temperature and the inner coil temperature" specifically includes:

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

[0066] Alternatively, S54, if the indoor ambient temperature is greater than a fourth preset temperature, the heating device is controlled to switch from an on state to an off state;

[0067] Alternatively, S55, if the outdoor ambient temperature is greater than a fifth preset temperature, the heating device is controlled to switch from an on state to an off state;

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

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

[0070] In addition, the present application does not specifically limit the values ​​of the preset difference, the fourth preset temperature, the fifth preset temperature, and the sixth preset temperature. Without departing from the basic principles of the present invention, the design is flexible according to actual use requirements. For example, the preset difference is 1°C, the fourth preset temperature is 17°C, the fifth preset temperature is 12°C, and the sixth preset temperature is 45°C.

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

[0072] When the heating device is in the starting state, determining whether a shutdown instruction to shut down the heating device is received;

[0073] If a shutdown command is received, the heating device is controlled to switch from an on state to an off state.

[0074] In one embodiment, when the air conditioner is started and in heating mode, the running time of the compressor is obtained, and the inner coil temperature of the indoor heat exchanger 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 the second preset time and then obtains the inner coil temperature. At this time, the inner coil temperature is higher than the temperature when the heating mode is just entered. If the inner coil temperature obtained at this time is greater than the third preset temperature, the heating device is not turned on, which reduces the frequency of turning on the heating device and is beneficial to saving resources.

[0076] In one embodiment, the second preset time is 30s to 90s. Exemplarily, the second preset time is 35s or 40s. It should be noted that the specific value of the second preset time is not specifically limited in this application, and is flexibly designed according to actual use requirements without departing from the basic principles of the present invention.

[0077] In addition, the present invention also provides an air conditioner, including a controller, which can execute the control method for preventing cold wind of the air conditioner as described in any of the above technical solutions.

[0078] In the above-mentioned various embodiments and various expanded implementation methods, the heating device can heat the wind before entering the indoor heat exchanger through the heating device when it is turned on, so that the temperature of the wind entering the indoor heat exchanger increases, which can not only exchange heat with the inner coil, but also help to increase the temperature of the refrigerant in the inner coil and accelerate the temperature rise of the refrigerant. In addition, after the warm air heated by the heating device exchanges heat with the refrigerant, the temperature is also higher than the indoor ambient temperature. Therefore, after the heating device is started for the first preset time, the indoor fan is turned on, thereby shortening the indoor fan stop time, that is, shortening the waiting time, achieving a rapid heating effect, improving the user experience, and reducing the impact of excessive load on the compressor under anti-cold wind protection.

[0079] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle 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 these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A method for controlling cold wind of an air conditioner, characterized in that: The air conditioner comprises an indoor heat exchanger, an indoor fan and a heating device, wherein the heating device is arranged between the indoor fan and the indoor heat exchanger, and the heating device can heat the wind before entering the indoor heat exchanger. The control method comprises: When the air conditioner is in heating mode, obtain the indoor ambient temperature, outdoor ambient temperature, user set temperature and the inner coil temperature of the indoor heat exchanger; Obtaining the temperature difference between the user set temperature and the indoor ambient temperature; Based on the temperature difference, the indoor ambient temperature, the outdoor ambient temperature and the temperature of the inner coil, determining whether to control the heating device to start; After the heating device is started for a first preset time, it is determined whether the indoor fan is in an on state, and if the indoor fan is in an off state, the indoor fan is controlled to be turned on.

2. The control method for preventing cold wind of an air conditioner according to claim 1, characterized in that: The step of "determining whether to control the heating device to start based on the temperature difference, the indoor ambient temperature, the outdoor ambient temperature and the inner coil temperature" specifically includes: 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, the heating device is controlled to start.

3. The control method for preventing cold wind of an air conditioner according to claim 1, characterized in that: The control method further comprises: When the heating device is in the started state, it is determined whether to control the heating device to switch from the started state to the off state based on at least one of the air conditioner operation mode, the indoor fan operation state, the temperature difference, the indoor ambient temperature, the outdoor ambient temperature and the inner coil temperature.

4. The control method for preventing cold wind of an air conditioner according to claim 3, characterized in that: The step of "determining whether to control the heating device to switch from the start state to the off state according to at least one of the air conditioner operation mode, the indoor fan operation state, the temperature difference, the indoor ambient temperature, the outdoor ambient temperature and the inner coil temperature" specifically includes: If the operation mode of the air conditioner is converted to a non-heating mode or an off mode, the heating device is controlled to switch from an on state to an off state; and / or If the operating state of the indoor fan is in the off state, the heating device is controlled to switch from the on state to the off state.

5. The control method for preventing cold wind of an air conditioner according to claim 3, characterized in that: The step of "determining whether to control the heating device to switch from the start state to the off state according to at least one of the air conditioner operation mode, the indoor fan operation state, the temperature difference, the indoor ambient temperature, the outdoor ambient temperature and the inner coil temperature" specifically includes: If the temperature difference is less than a preset difference, the heating device is controlled to switch from an on state to an off state; and / or If the indoor ambient temperature is greater than a fourth preset temperature, the heating device is controlled to switch from an on state to an off state; and / or If the outdoor ambient temperature is greater than a fifth preset temperature, the heating device is controlled to switch from an on state to an off state; and / or If the inner coil temperature is greater than a sixth preset temperature, the heating device is controlled to switch from an on state to an off state.

6. The control method for preventing cold wind of an air conditioner according to claim 3, characterized in that: The control method further comprises: When the heating device is in the started state, determining whether a shutdown instruction to shut down the heating device is received; If a shutdown command is received, the heating device is controlled to switch from an on state to an off state.

7. The control method for preventing cold wind of an air conditioner according to claim 1, characterized in that: The air conditioner comprises a compressor. When the air conditioner is started and in a heating mode, the running time of the compressor is obtained, and the inner coil temperature of the indoor heat exchanger is obtained after the running time reaches a second preset time.

8. The method for controlling cold wind protection of an air conditioner according to claim 1, characterized in that: The heating device comprises an electromagnetic heating coil and a heat exchange pipeline. The electromagnetic heating coil is wound on the heat exchange pipeline. The heat exchange pipeline is arranged between the indoor fan and the indoor heat exchanger.

9. The control method for preventing cold wind of an air conditioner according to claim 7, characterized in that: The first preset time is 5s to 30s; and / or. The second preset time is 30s to 90s.

10. An air conditioner, characterized in that: It comprises a controller, which can execute the control method for preventing cold wind of the air conditioner as described in any one of claims 1-9.

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