Air conditioner and control method thereof

Abstract

The application provides an air conditioner and a control method thereof, and relates to the technical field of air conditioner control. In the control method of the air conditioner, the outdoor fan in the air conditioner is controlled to stop working when the air conditioner is in a heating mode and the actual temperature of the indoor unit coil in the air conditioner is greater than or equal to a first preset temperature, so that the high-temperature protection is triggered when the actual temperature of the indoor unit coil is greater than or equal to the first preset temperature. In addition, the rotating speed of the outdoor fan in the air conditioner is reduced when the air conditioner is in the heating mode and the actual temperature of the indoor unit coil is less than the first preset temperature, and the temperature of the indoor unit coil can be reduced by reducing the rotating speed of the outdoor fan in the air conditioner, so that the temperature of the indoor unit coil does not exceed the first preset temperature in this case. In conclusion, the application can avoid triggering the high-temperature protection, so that the outdoor fan can be prevented from frequently starting and stopping, the possibility of causing the temperature of the indoor unit to be high and low is reduced, and the influence on the user experience is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioner control, in particular to an air conditioner and a control method thereof. BACKGROUND

[0002] At present, air conditioners are divided into fixed-frequency air conditioners and variable-frequency air conditioners. When a fixed-frequency air conditioner is heating, the frequency of the air conditioner is fixed, so when the load of the compressor in the air conditioner is large, the pressure of the air conditioner is large, and the exhaust of the compressor is also high, thereby causing the temperature of the indoor coil in the air conditioner to be high.

[0003] When the temperature of the indoor coil is too high, the air conditioner is protected by stopping the operation of the outdoor fan in the air conditioner, and when the temperature of the indoor coil decreases, the outdoor fan is made to operate normally. The outdoor fan may frequently start and stop, thereby causing the temperature of the indoor air outlet to be high and low, and further affecting the user experience.

[0004] Therefore, how to avoid frequent starting and stopping of the outdoor fan is a technical problem to be solved. SUMMARY

[0005] Therefore, the present application provides an air conditioner and a control method thereof to avoid frequent starting and stopping of the outdoor fan.

[0006] To achieve the above object, the embodiments of the present application provide the following technical solutions.

[0007] In one aspect, the present application provides a control method of an air conditioner, comprising:

[0008] After the air conditioner is started, it is determined whether the air conditioner is in a heating mode;

[0009] If the air conditioner is in the heating mode, it is determined whether the actual temperature of the indoor coil in the air conditioner is less than a first preset temperature;

[0010] If the actual temperature of the indoor coil is less than the first preset temperature, the rotation speed of the outdoor fan in the air conditioner is reduced;

[0011] If the actual temperature of the indoor coil is greater than or equal to the first preset temperature, the outdoor fan is controlled to stop working.

[0012] Optionally, before the rotation speed of the outdoor fan in the air conditioner is reduced, the method further comprises:

[0013] It is determined whether the actual temperature of the indoor coil is greater than or equal to a second preset temperature; the second preset temperature is less than the first preset temperature;

[0014] If the actual temperature of the indoor coil is greater than or equal to the second preset temperature, the step of reducing the rotation speed of the outdoor fan is performed.

[0015] Optionally, if the actual temperature of the indoor coil is less than the second preset temperature, the initial rotating speed of the outdoor fan is maintained.

[0016] Optionally, the method further comprises:

[0017] determining a change amount of the rotating speed of the outdoor fan according to a difference between the first preset temperature and the actual temperature of the indoor coil;

[0018] decreasing the initial rotating speed of the outdoor fan by the change amount.

[0019] Optionally, determining the change amount of the rotating speed of the outdoor fan according to the difference between the first preset temperature and the actual temperature of the indoor coil comprises:

[0020] determining a product of the difference and a preset coefficient as the change amount.

[0021] Optionally, determining the product of the difference and the preset coefficient as the change amount comprises:

[0022] determining a product of the difference and a first coefficient as the change amount if the actual temperature of the indoor coil is greater than or equal to a third preset temperature, the third preset temperature being less than the first preset temperature;

[0023] determining a product of the difference and a second coefficient as the change amount if the actual temperature of the indoor coil is less than the third preset temperature, the second coefficient being less than the first coefficient.

[0024]

[0025] Optionally, before determining the product of the difference and the preset coefficient as the change amount, the method further comprises:

[0026] rounding the difference.

[0027] Optionally, after determining the product of the difference and the preset coefficient as the change amount, the method further comprises:

[0028] rounding the change amount.

[0029] Optionally, in a case that the air conditioner is in a heating mode, the control method of the air conditioner further comprises:

[0030] ​determining whether the actual temperature of the indoor coil is greater than or equal to a fourth preset temperature; the fourth preset temperature is greater than the first preset temperature;

[0031] if the actual temperature of the indoor coil is greater than or equal to the fourth preset temperature, stopping the operation of the outdoor fan and the compressor in the air conditioner.

[0032] Another aspect of the present application provides an air conditioner, and a controller in the air conditioner is configured to perform the control method of the air conditioner according to any one of the preceding aspects.

[0033] According to the above technical solution, the present application provides a control method of an air conditioner. In the control method of the air conditioner, the outdoor fan in the air conditioner is stopped when the air conditioner is in the heating mode and the actual temperature of the indoor coil in the air conditioner is greater than or equal to the first preset temperature, so that the high-temperature protection is triggered when the actual temperature of the indoor coil in the air conditioner is greater than or equal to the first preset temperature. In addition, the speed of the outdoor fan in the air conditioner is reduced when the air conditioner is in the heating mode and the actual temperature of the indoor coil in the air conditioner is less than the first preset temperature, and the temperature of the indoor coil in the air conditioner is reduced by reducing the speed of the outdoor fan in the air conditioner, so that the temperature of the indoor coil in the air conditioner does not exceed the first preset temperature. In summary, the present application can avoid triggering the high-temperature protection, so as to avoid frequent start-stop of the outdoor fan in the air conditioner, thereby reducing the possibility of causing the indoor air temperature in the air conditioner to fluctuate, and further reducing the impact on the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the provided drawings.

[0035] Figure 1 and Figure 2 are flowcharts of two implementation manners of the control method of the air conditioner provided by the embodiments of the present application, respectively;

[0036] Figure 3 and Figure 4 are flowcharts of two implementation manners of step S130 provided by the embodiments of the present application, respectively;

[0037] Figure 5 is a flowchart of one implementation manner of step S410 provided by the embodiments of the present application;

[0038] Figure 6 and Figure 7Flowchart of another embodiment of step S130 provided by the present application;

[0039] Figure 8 Flowchart of another embodiment of the control method of the air conditioner provided by the present application. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0041] In the present application, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0042] In order to avoid frequent start and stop of the outdoor fan, the present application provides a control method of an air conditioner, and the specific structure is as shown in Figure 1 The specific steps include the following steps:

[0043] S110, after starting the air conditioner, it is judged whether the air conditioner is in a heating mode.

[0044] If the air conditioner is in the heating mode, step S120 is executed; if the air conditioner is not in the heating mode, the control method of the air conditioner is stopped.

[0045] It should be noted that the heating mode of the air conditioner is very mature in the prior art, and will not be described here. In addition, the air conditioner is very mature in the prior art, and the specific structure of the air conditioner will not be described in detail here.

[0046] S120, it is judged whether the actual temperature of the indoor coil in the air conditioner is less than a first preset temperature.

[0047] If the actual temperature of the indoor coil in the air conditioner is less than the first preset temperature, step S130 is performed; if the actual temperature of the indoor coil in the air conditioner is greater than or equal to the first preset temperature, step S140 is performed.

[0048] The actual temperature of the indoor coil in the air conditioner being greater than or equal to the first preset temperature indicates that the actual temperature of the indoor coil in the air conditioner has reached a very high temperature. Conversely, the actual temperature of the indoor coil in the air conditioner being less than the first preset temperature indicates that the actual temperature of the indoor coil in the air conditioner has not reached a very high temperature.

[0049] In actual applications, the first preset temperature is set according to the actual situation of the air conditioner, which is not limited here.

[0050] It should be noted that the indoor coil in the air conditioner is very mature in the prior art, and will not be described in detail here.

[0051] S130, reducing the rotating speed of the outdoor fan in the air conditioner.

[0052] It should be noted that the outdoor fan in the air conditioner is very mature in the prior art, and will not be described in detail here.

[0053] S140, controlling the outdoor fan in the air conditioner to stop working.

[0054] In the control method of the air conditioner, since the outdoor fan in the air conditioner is controlled to stop working when the air conditioner is in the heating mode and the actual temperature of the indoor coil in the air conditioner is greater than or equal to the first preset temperature, the high-temperature protection is triggered when the actual temperature of the indoor coil in the air conditioner is greater than or equal to the first preset temperature. In addition, since the rotating speed of the outdoor fan in the air conditioner is reduced when the air conditioner is in the heating mode and the actual temperature of the indoor coil in the air conditioner is less than the first preset temperature, and reducing the rotating speed of the outdoor fan in the air conditioner can reduce the temperature of the indoor coil in the air conditioner, the temperature of the indoor coil in the air conditioner will not exceed the first preset temperature in this case. In summary, the present application can avoid triggering the high-temperature protection, so as to avoid frequent starting and stopping of the outdoor fan in the air conditioner, thereby reducing the possibility of causing the indoor air temperature of the air conditioner to be high and low, and further reducing the impact on the user experience.

[0055] Another embodiment of the present application provides another implementation of the control method of the air conditioner, as shown in Figure 2 The implementation further includes the following steps before step S130 in the above-mentioned implementation.

[0056] S210, determining whether the actual temperature of the indoor coil in the air conditioner is greater than or equal to a second preset temperature.

[0057] If the actual temperature of the indoor unit coil in the air conditioner is greater than or equal to the second preset temperature, step S130 is executed; if the actual temperature of the indoor unit coil in the air conditioner is less than the second preset temperature, step S220 is executed.

[0058] The second preset temperature is less than the first preset temperature.

[0059] The actual temperature of the indoor unit coil in the air conditioner being less than the second preset temperature indicates that the actual temperature of the indoor unit coil in the air conditioner does not reach a higher temperature; conversely, the actual temperature of the indoor unit coil in the air conditioner being greater than or equal to the second preset temperature indicates that the actual temperature of the indoor unit coil in the air conditioner reaches a higher temperature.

[0060] In actual application, the second preset temperature is set according to the actual situation of the air conditioner, which is not limited here. Generally, the second preset temperature can be set as the first preset temperature-6℃.

[0061] S220, maintaining the initial rotating speed of the outdoor fan in the air conditioner unchanged.

[0062] It should be noted that the initial rotating speed of the outdoor fan in the air conditioner is set according to the actual situation of the air conditioner, which is not repeated here.

[0063] Generally, reducing the rotating speed of the outdoor fan in the air conditioner will affect the indoor air outlet temperature of the air conditioner to some extent, but the embodiment provided in the present embodiment reduces the rotating speed of the outdoor fan in the air conditioner when the actual temperature of the indoor unit coil in the air conditioner reaches a higher temperature, and does not reduce the rotating speed of the outdoor fan in the air conditioner when the actual temperature of the indoor unit coil in the air conditioner does not reach a higher temperature, so the embodiment provided in the present embodiment not only avoids the frequent start-stop of the outdoor fan in the air conditioner, but also reduces the influence on the indoor air outlet temperature of the air conditioner caused by the reduction of the rotating speed of the outdoor fan in the air conditioner to some extent, so that the embodiment provided in the present embodiment reduces the fluctuation of the indoor air outlet temperature of the air conditioner, and further, the embodiment provided in the present embodiment further optimizes the user experience.

[0064] Another embodiment of the present application provides an embodiment of step S130, which has a specific structure as shown in Figure 3 and specifically includes the following steps:

[0065] S310, determining the change amount of the rotating speed of the outdoor fan in the air conditioner according to the difference between the first preset temperature and the actual temperature of the indoor unit coil in the air conditioner.

[0066] S320, reducing the change amount on the basis of the initial rotating speed of the outdoor fan in the air conditioner.

[0067] It should be noted that the initial rotating speed of the outdoor fan in the air conditioner has been described in the above embodiment, which is not repeated here.

[0068] In the embodiment, since the change amount is related to the difference between the first preset temperature and the actual temperature of the indoor coil in the air conditioner, the embodiment makes the change amount more reasonable, and thus the embodiment avoids frequent start and stop of the outdoor fan in the air conditioner, and to some extent, reduces the influence of the reduced rotating speed of the outdoor fan in the air conditioner on the outlet air temperature of the indoor unit, thereby the embodiment reduces the fluctuation of the outlet air temperature of the indoor unit in the air conditioner, and further, the embodiment further optimizes the user experience.

[0069] Another embodiment of the application provides an embodiment of step S310, which has the specific structure as shown in Figure 4 The specific steps include the following steps.

[0070] S410, determining the product of the difference and a preset coefficient as the change amount.

[0071] The change amount is equal to the product of the difference and the preset coefficient, indicating that the change amount is in a positive proportional relationship with the difference.

[0072] In actual application, the preset coefficient is determined according to the actual situation of the air conditioner, which is not limited here.

[0073] The above is only an embodiment of step S310, and in actual application, it includes but is not limited to this, which is not limited here, and can be determined according to the specific situation, and is within the protection scope of the application.

[0074] Another embodiment of the application provides an embodiment of step S410, which has the specific structure as shown in Figure 5 The specific steps include the following steps.

[0075] S510, determining whether the actual temperature of the indoor coil in the air conditioner is greater than or equal to a third preset temperature.

[0076] If the actual temperature of the indoor coil in the air conditioner is greater than or equal to the third preset temperature, step S520 is performed; if the actual temperature of the indoor coil in the air conditioner is less than the third preset temperature, step S530 is performed.

[0077] The third preset temperature is less than the first preset temperature. If step S510 and step S210 are included at the same time, the third preset temperature is greater than the second preset temperature.

[0078] The actual temperature of the indoor unit coil in the air conditioner is greater than or equal to the third preset temperature, which indicates that if the outdoor fan in the air conditioner rotates at the initial rotating speed, the temperature of the indoor unit coil in the air conditioner will rise faster. Conversely, the actual temperature of the indoor unit coil in the air conditioner is less than the third preset temperature, which indicates that if the outdoor fan in the air conditioner rotates at the initial rotating speed, the temperature of the indoor unit coil in the air conditioner will rise slower.

[0079] In practical applications, the third preset temperature is set according to the actual situation of the air conditioner, which is not specifically limited here. Generally, the third preset temperature can be set to: the first preset temperature-3℃.

[0080] S520, determining the product of the first coefficient and the difference as the change amount.

[0081] S530, determining the product of the second coefficient and the difference as the change amount.

[0082] The second coefficient is less than the first coefficient, in other words, the change amount is larger when the actual temperature of the indoor unit coil in the air conditioner is greater than or equal to the third preset temperature, and the change amount is smaller when the actual temperature of the indoor unit coil in the air conditioner is less than the third preset temperature.

[0083] In practical applications, the first coefficient and the second coefficient are both set according to the actual situation of the air conditioner, which is not specifically limited here. Generally, the first coefficient is equal to 150, and the second coefficient is equal to 100.

[0084] In the embodiment, in the case that the outdoor fan in the air conditioner rotates at the initial rotating speed will make the temperature of the indoor unit coil in the air conditioner rise faster, the rotating speed of the outdoor fan in the air conditioner is reduced by a larger value, and in the case that the outdoor fan in the air conditioner rotates at the initial rotating speed will make the temperature of the indoor unit coil in the air conditioner rise slower, the rotating speed of the outdoor fan in the air conditioner is reduced by a smaller value, so the implementation provided in the embodiment not only avoids the frequent start-stop of the outdoor fan in the air conditioner, but also reduces the impact on the indoor air outlet temperature of the air conditioner caused by the reduction of the rotating speed of the outdoor fan in the air conditioner to a certain extent, so that the implementation provided in the embodiment reduces the fluctuation of the indoor air outlet temperature of the air conditioner, and further, the implementation provided in the embodiment further optimizes the user experience.

[0085] Another embodiment of the present application provides another implementation of step S310, which has a specific structure as shown in Figure 6 The embodiment further includes the following steps before step S410 in the above-mentioned implementation:

[0086] S610, rounding the difference.

[0087] It should be noted that the rounding is a very mature operation in the prior art, and will not be described in detail here.

[0088] In the embodiment, the rounding of the change amount after step S410 can avoid the change amount from being a decimal number, and thus can make the control logic of the speed of the outdoor fan in the air conditioner more concise and clear, thereby reducing the complexity and uncertainty that can be introduced due to decimal processing, and further improving the reliability of the control logic of the speed of the outdoor fan in the air conditioner.

[0089] Another embodiment of the application provides another implementation of step S310, which has the specific structure as shown in Figure 7 The implementation further includes the following steps after step S410 in the above implementation.

[0090] S710, rounding the change amount.

[0091] It should be noted that the rounding is a very mature operation in the prior art, and will not be described in detail here.

[0092] In the embodiment, the rounding of the change amount after step S410 can avoid the change amount from being a decimal number, and thus can make the control logic of the speed of the outdoor fan in the air conditioner more concise and clear, thereby reducing the complexity and uncertainty that can be introduced due to decimal processing, and further improving the reliability of the control logic of the speed of the outdoor fan in the air conditioner.

[0093] Another embodiment of the application provides another implementation of the control method of the air conditioner, which has the specific structure as shown in Figure 8 The implementation further includes the following steps when the air conditioner is in the heating mode in the above implementation.

[0094] S810, determining whether the actual temperature of the indoor coil in the air conditioner is greater than or equal to a fourth preset temperature.

[0095] If the actual temperature of the indoor coil in the air conditioner is greater than or equal to the fourth preset temperature, step S820 is performed; if the actual temperature of the indoor coil in the air conditioner is less than the fourth preset temperature, the control method of the air conditioner is stopped.

[0096] The fourth preset temperature is greater than the first preset temperature.

[0097] The actual temperature of the indoor coil in the air conditioner being greater than or equal to the fourth preset temperature indicates that the actual temperature of the indoor coil in the air conditioner reaches an extremely high temperature. Conversely, the actual temperature of the indoor coil in the air conditioner being less than the fourth preset temperature indicates that the actual temperature of the indoor coil in the air conditioner does not reach an extremely high temperature.

[0098] In practical applications, the fourth preset temperature is set according to the actual situation of the air conditioner, which is not limited here.

[0099] S820, the outdoor fan in the air conditioner and the compressor in the air conditioner are both stopped.

[0100] It should be noted that the compressor in the air conditioner is very mature in the prior art, which will not be described in detail here.

[0101] In this embodiment, in the case that the indoor coil in the air conditioner actually reaches an extremely high temperature, the outdoor fan in the air conditioner and the compressor in the air conditioner are both stopped, so that the damage of high temperature to the internal components of the air conditioner can be avoided to a certain extent, thereby improving the safety of the air conditioner.

[0102] Another embodiment of the present application provides an air conditioner. In the air conditioner, the controller is configured to perform the control method of the air conditioner provided in the above embodiments.

[0103] In this embodiment, since the controller in the air conditioner is configured to perform the control method of the air conditioner provided in the above embodiments, the high-temperature protection can be triggered, so that the outdoor fan can be frequently started and stopped, thereby reducing the possibility of causing the indoor air outlet temperature to be high and low, and further reducing the impact on the user experience, i.e. optimizing the user experience, which is beneficial to market promotion.

[0104] The above description of the disclosed embodiments, the features described in each embodiment in the specification can be replaced or combined with each other, so that those skilled in the art can realize or use the present application. The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as the above preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make many possible changes and modifications to the technical solutions of the present application, or modify equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the technical solutions of the present application, still belongs to the protection scope of the present application.

Claims

1. A control method of an air conditioner, characterized by, The method comprises: After the air conditioner is started, it is determined whether the air conditioner is in a heating mode; If the air conditioner is in the heating mode, it is determined whether the actual temperature of an indoor unit coil in the air conditioner is less than a first preset temperature; If the actual temperature of the indoor unit coil is less than the first preset temperature, the rotating speed of an outdoor fan in the air conditioner is reduced; If the actual temperature of the indoor unit coil is greater than or equal to the first preset temperature, the outdoor fan is controlled to stop working; Before the rotating speed of the outdoor fan in the air conditioner is reduced, the method further comprises: It is determined whether the actual temperature of the indoor unit coil is greater than or equal to a second preset temperature; the second preset temperature is less than the first preset temperature; If the actual temperature of the indoor unit coil is greater than or equal to the second preset temperature, the step of reducing the rotating speed of the outdoor fan is executed; if the actual temperature of the indoor unit coil is less than the second preset temperature, the initial rotating speed of the outdoor fan is maintained unchanged; The rotating speed of the outdoor fan in the air conditioner is reduced, which comprises: According to the difference between the first preset temperature and the actual temperature of the indoor unit coil, a change amount of the rotating speed of the outdoor fan is determined; The change amount is reduced from the initial rotating speed of the outdoor fan.

2. The control method of the air conditioner according to claim 1, characterized by, According to the difference between the first preset temperature and the actual temperature of the indoor unit coil, a change amount of the rotating speed of the outdoor fan is determined, which comprises: The product of the difference and a preset coefficient is determined as the change amount.

3. The control method of the air conditioner according to claim 2, characterized by, The product of the difference and a preset coefficient is determined as the change amount, which comprises: It is determined whether the actual temperature of the indoor unit coil is greater than or equal to a third preset temperature; the third preset temperature is less than the first preset temperature; If the actual temperature of the indoor unit coil is greater than or equal to the third preset temperature, the product of a first coefficient and the difference is determined as the change amount; If the actual temperature of the indoor unit coil is less than the third preset temperature, the product of a second coefficient and the difference is determined as the change amount; the second coefficient is less than the first coefficient.

4. The control method of the air conditioner according to claim 2, characterized by, Before the product of the difference and a preset coefficient is determined as the change amount, according to the difference between the first preset temperature and the actual temperature of the indoor unit coil, a change amount of the rotating speed of the outdoor fan is determined, which further comprises: The difference is rounded.

5. The control method of the air conditioner according to claim 2, characterized by, After the product of the difference and a preset coefficient is determined as the change amount, according to the difference between the first preset temperature and the actual temperature of the indoor unit coil, a change amount of the rotating speed of the outdoor fan is determined, which further comprises: The change amount is rounded.

6. The control method of the air conditioner according to claim 1, characterized by, In the case that the air conditioner is in the heating mode, the control method of the air conditioner further comprises: It is determined whether the actual temperature of the indoor unit coil is greater than or equal to a fourth preset temperature; the fourth preset temperature is greater than the first preset temperature; If the actual temperature of the indoor unit coil is greater than or equal to the fourth preset temperature, the outdoor fan and a compressor in the air conditioner are both controlled to stop working.

7. An air conditioner characterized by comprising: The controller in the air conditioner is configured to execute the control method of the air conditioner according to any one of claims 1 to 6.

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