Control method for detecting and correcting indoor coil temperature of air conditioner

Abstract

The present application relates to air conditioning technical field, specifically provide a kind of control method for detecting and correcting the temperature of the indoor coil of air conditioner, to solve the problem that air conditioner stops running due to the abnormality of the temperature of the indoor coil in prior art.In order to achieve the purpose, the air conditioner of the present application includes the first sensor for detecting the temperature of the indoor coil, and the second sensor for detecting the ambient temperature of the air conditioner, and the control method for detecting and correcting the temperature of the indoor coil of air conditioner includes: selecting the operating mode of the air conditioner, setting the preset temperature of the air conditioner;Obtain the temperature of the indoor coil, real-time obtain the ambient temperature detected by the second sensor;Confirm whether the temperature of the indoor coil is within the limit temperature range corresponding to the operating mode;When the temperature of the indoor coil is not within the limit temperature range corresponding to the operating mode, the ambient temperature detected by the second sensor is used to estimate and assign the temperature of the indoor coil;Control the air conditioner to continue running with estimated assignment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and specifically provides a control method for detecting and correcting the temperature of an indoor coil of an air conditioner. BACKGROUND

[0002] With the continuous improvement of living standards, air conditioners are increasingly entering people's lives. During the operation of the air conditioner, the indoor temperature, the indoor coil temperature, etc. are usually detected by a temperature sensor to ensure that the indoor temperature can reach the preset temperature. However, when the indoor coil temperature sensor fails, the operation program of the air conditioner will stop running due to the lack of necessary temperature parameter values. The stop of the operation of the air conditioner will affect the indoor cooling or heating effect, thereby affecting the user experience.

[0003] Accordingly, there is a need in the art for a new control method for detecting and correcting the temperature of an indoor coil of an air conditioner to solve the problem of stopping the operation of the air conditioner due to abnormal temperature of the indoor coil in the prior art. SUMMARY

[0004] The present application aims to solve the above technical problems, i.e., to solve the problem of stopping the operation of the air conditioner due to abnormal temperature of the indoor coil in the prior art.

[0005] In a first aspect, the present application provides a control method for detecting and correcting the temperature of an indoor coil of an air conditioner, the air conditioner comprising a first sensor for detecting the temperature of the indoor coil of the air conditioner, and a second sensor for detecting the ambient temperature of the air conditioner, the control method comprising: selecting an operation mode of the air conditioner, and setting a preset temperature of the air conditioner; obtaining the temperature of the indoor coil detected by the first sensor, and obtaining the ambient temperature detected by the second sensor in real time; confirming whether the temperature of the indoor coil is within a temperature range corresponding to the operation mode; when the temperature of the indoor coil is not within the temperature range corresponding to the operation mode, estimating and assigning the temperature of the indoor coil based on the ambient temperature detected by the second sensor; and controlling the air conditioner to continue running with the estimated and assigned temperature.

[0006] In the preferred technical solution of the above control method for detecting and correcting the temperature of an indoor coil of an air conditioner, the operation mode of the air conditioner comprises a cooling mode and a heating mode, the temperature range corresponding to the cooling mode is a range less than a first temperature limit value, and the temperature range corresponding to the heating mode is a range greater than a second temperature limit value.

[0007] In the preferred technical scheme of the control method for detecting and correcting the indoor coil temperature of the air conditioner, when the operation mode of the air conditioner is selected as the cooling mode, the step of "when the indoor coil temperature is not within the limit temperature range corresponding to the operation mode, estimating and assigning the indoor coil temperature based on the ambient temperature detected by the second sensor" further comprises: when the indoor coil temperature is less than the first temperature limit value, estimating and assigning the indoor coil temperature, wherein the estimated and assigned indoor coil temperature is set as the sum of the ambient temperature and a first correction value.

[0008] In the preferred technical scheme of the control method for detecting and correcting the indoor coil temperature of the air conditioner, the control method further comprises: when the operation mode of the air conditioner is selected as the cooling mode, and when the indoor coil temperature is greater than or equal to the first temperature limit value, controlling the air conditioner to continue operating for T1 time; after the air conditioner operates for T1 time, detecting the indoor coil temperature; comparing the indoor coil temperature with the preset temperature and a third temperature limit value; when the indoor coil temperature is less than the preset temperature while being greater than the third temperature limit value, controlling the air conditioner to continue operating; wherein the third temperature limit value is less than the preset temperature.

[0009] In the preferred technical scheme of the control method for detecting and correcting the indoor coil temperature of the air conditioner, the control method further comprises: when the indoor coil temperature is greater than or equal to the preset temperature or the indoor coil temperature is less than or equal to a third temperature limit value, controlling the air conditioner to calculate a change rate V of the indoor coil temperature within T2 time; when the change rate V is greater than a first change limit value, estimating and assigning the indoor coil temperature based on the ambient temperature detected by the second sensor; controlling the air conditioner to continue operating with the estimated and assigned value; and / or, when the change rate V is less than or equal to the first change limit value, controlling the air conditioner to continue operating.

[0010] In the preferred technical scheme of the control method for detecting and correcting the indoor coil temperature of the air conditioner, when the operation mode of the air conditioner is selected as the heating mode, the step of "when the indoor coil temperature is not within the limit temperature range corresponding to the operation mode, estimating and assigning the indoor coil temperature based on the ambient temperature detected by the second sensor" further comprises: when the indoor coil temperature is greater than a second temperature limit value, estimating and assigning the indoor coil temperature, wherein the estimated and assigned indoor coil temperature is set as the sum of the ambient temperature and a second correction value.

[0011] In the preferred technical scheme of the control method for detecting and correcting the indoor coil temperature of the air conditioner, the control method further comprises: when the indoor coil temperature is less than or equal to the second temperature limit value, controlling the air conditioner to continue running for T1 time; detecting the indoor coil temperature after the air conditioner runs for T1 time; comparing the indoor coil temperature with a fourth temperature limit value and the preset temperature; when the indoor coil temperature is less than the fourth temperature limit value and greater than the preset temperature, controlling the air conditioner to continue running; and the fourth temperature limit value is greater than the preset temperature.

[0012] In the preferred technical scheme of the control method for detecting and correcting the indoor coil temperature of the air conditioner, the control method further comprises: when the indoor coil temperature is greater than or equal to the fourth temperature limit value or the indoor coil temperature is less than or equal to the preset temperature, controlling the air conditioner to calculate a change rate V of the indoor coil temperature within T3 time; when the change rate V is greater than a second change limit value, based on the ambient temperature detected by the second sensor, the indoor coil temperature is pre-estimated and assigned; and the air conditioner is controlled to continue running according to the pre-estimated and assigned value.

[0013] In the preferred technical scheme of the control method for detecting and correcting the indoor coil temperature of the air conditioner, the control method further comprises: when the change rate V is less than or equal to the second change limit value, the air conditioner is controlled to continue running.

[0014] In the preferred technical scheme of the control method for detecting and correcting the indoor coil temperature of the air conditioner, the control method further comprises: when the air conditioner needs to be controlled to continue running according to the pre-estimated and assigned value, before, after or at the same time when the ambient temperature reaches the preset temperature, the air conditioner is controlled to start an alarm mode.

[0015] In the case of adopting the above technical scheme, the present application can judge whether the first temperature sensor is abnormal by judging whether the detected indoor coil temperature is within the limit temperature range. In order to avoid the air conditioner stopping running automatically after detecting that the indoor coil temperature is not within the corresponding limit temperature range, the present application pre-estimates and assigns the indoor coil temperature after detecting that the indoor coil temperature is abnormal, and then the air conditioner continues running according to the pre-estimated and assigned value instead of the detected value. The above setting can avoid the problem that the air conditioner stops running after detecting that the indoor coil temperature is abnormal, thereby affecting the indoor effect. BRIEF DESCRIPTION OF DRAWINGS

[0016] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:

[0017] Figure 1is the main step flow chart of the control method for detecting and correcting the indoor coil temperature of an air conditioner of the present application;

[0018] Figure 2 is the flow chart of the first specific embodiment of the control method for detecting and correcting the indoor coil temperature of an air conditioner of the present application;

[0019] Figure 3 is the flow chart of the second specific embodiment of the control method for detecting and correcting the indoor coil temperature of an air conditioner of the present application;

[0020] Figure 4 is the flow chart of the third specific embodiment of the control method for detecting and correcting the indoor coil temperature of an air conditioner of the present application;

[0021] Figure 5 is the flow chart of the fourth specific embodiment of the control method for detecting and correcting the indoor coil temperature of an air conditioner of the present application. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present application will be 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 application, and are not intended to limit the protection scope of the present application. Those skilled in the art can make adjustments as needed to adapt to specific application occasions.

[0023] It should be noted that in the description of the present application, the terms indicating the direction or positional relationship of "in", "out" and the like are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] As shown in Figures 1-5 To solve the problem of stopping operation of the air conditioner caused by abnormal indoor coil temperature in the prior art, the air conditioner used in the control method for detecting and correcting the indoor coil temperature of an air conditioner of the present application comprises a first sensor for detecting the indoor coil temperature of the air conditioner, and a second sensor for detecting the ambient temperature of the air conditioner. Whether the indoor coil temperature detected by the first sensor is abnormal is judged, and when the detected indoor coil temperature is abnormal, the indoor coil temperature can be valued according to the ambient temperature of the air conditioner, so as to ensure the continuous operation of the air conditioner.

[0025] As shown in Figure 1The diagram shows the main steps of the control method for detecting and correcting the indoor unit coil temperature of an air conditioner according to the present invention, specifically including the following steps:

[0026] Step S100: Select the operating mode of the air conditioner and set the preset temperature of the air conditioner;

[0027] Step S200: Obtain the indoor unit coil temperature detected by the first sensor and obtain the ambient temperature detected by the second sensor in real time;

[0028] Step S300: Confirm whether the indoor unit coil temperature is within the limit temperature range corresponding to the operating mode;

[0029] Step S400: When the indoor unit coil temperature is not within the limit temperature range corresponding to the operating mode, the indoor unit coil temperature is estimated and assigned based on the ambient temperature detected by the second sensor.

[0030] Step S500: Control the air conditioner to continue operating at the estimated value.

[0031] Generally, air conditioners operate in two modes: cooling and heating. The temperature range for cooling mode is below a first temperature limit, while the temperature range for heating mode is above a second temperature limit. In heating mode, if the detected indoor unit coil temperature exceeds the second temperature limit, or in cooling mode, if the detected indoor unit coil temperature is below the first temperature limit, it indicates an abnormality in the detected indoor unit coil temperature. In existing technology, when an abnormal indoor unit coil temperature is detected, the air conditioner will issue an alarm and automatically shut down, thus affecting the indoor temperature. To ensure the indoor temperature, this invention, upon detecting an abnormal indoor unit coil temperature, can pre-calculate the indoor unit coil temperature. This pre-calculated temperature is then output to the air conditioner's processing unit, allowing the air conditioner to continue operating. This setup ensures the continuity of the air conditioner's operation, thereby guaranteeing the indoor temperature. It should be noted that the ambient temperature mentioned above is approximately the ambient temperature near the indoor unit.

[0032] like Figure 2 The image shows one embodiment of the control method for detecting and correcting the indoor unit coil temperature of an air conditioner in cooling mode, as described in the present invention, specifically including the following steps:

[0033] Step S110: Select the air conditioner's cooling mode and set the air conditioner's preset temperature;

[0034] Step S210: Obtain the indoor unit coil temperature detected by the first sensor and obtain the ambient temperature detected by the second sensor in real time;

[0035] Step S310: confirming whether the indoor coil temperature is less than a first temperature limit value;

[0036] Step S410: when the indoor coil temperature is less than the first temperature limit value, the indoor coil temperature is assigned a predicted value;

[0037] Step S510: controlling the air conditioner to continue running with the predicted value.

[0038] In the cooling mode, when the indoor coil temperature is less than the first temperature limit value, the indoor coil temperature is not within the limit temperature range, and the indoor coil temperature needs to be assigned a predicted value. At this time, the predicted value of the indoor coil temperature can be set to the sum of the ambient temperature and the first correction value. Since the indoor coil temperature is relatively close to the ambient temperature, the predicted value of the indoor coil temperature is set to the ambient temperature plus the first correction value. After that, the indoor coil temperature obtained by the air conditioner is no longer the temperature detected by the first sensor, but the predicted value. Generally, when the air conditioner is cooling, the heat exchanger of the indoor unit acts as an evaporator, which uses the principle of evaporative heat absorption to cool the indoor environment. Therefore, the detected indoor coil temperature is greater than the ambient temperature of the air conditioner. Therefore, the predicted value of the indoor coil temperature in the cooling case is greater than the ambient temperature. At this time, the first correction value is positive. For example, the predicted value can be set to predicted value = indoor coil temperature + 2℃. The above is not limiting, and can be set according to the needs of those skilled in the art.

[0039] As shown in FIG. 4, it is another embodiment of the control method for detecting and correcting the indoor coil temperature of the air conditioner in the cooling mode, which specifically comprises the following steps: Figure 3

[0040] Step S110: selecting the cooling mode of the air conditioner, and setting the preset temperature of the air conditioner;

[0041] Step S210: obtaining the indoor coil temperature detected by the first sensor, and obtaining the ambient temperature detected by the second sensor in real time;

[0042] Step S310: confirming whether the indoor coil temperature is less than a first temperature limit value;

[0043] Step S410: when the indoor coil temperature is less than the first temperature limit value, the indoor coil temperature is assigned a predicted value;

[0044] Step S510: controlling the air conditioner to continue running with the predicted value.

[0045] Step S420: when the indoor coil temperature is greater than or equal to the first temperature limit value, controlling the air conditioner to continue running for T1 time;

[0046] ​Step S520: detecting the indoor coil temperature after the air conditioner runs for T1 time;

[0047] Step S610: comparing the indoor coil temperature with the preset temperature and the third temperature limit value;

[0048] Step S611: when the indoor coil temperature is less than the preset temperature while greater than the third temperature limit value, controlling the air conditioner to continue running;

[0049] Step S612: when the indoor coil temperature is greater than or equal to the preset temperature or the indoor coil temperature is less than or equal to the third temperature limit value, controlling the air conditioner to calculate the change rate V of the indoor coil temperature within T2 time;

[0050] Step S6121: when the change rate V is greater than the first change limit value, estimating and assigning the indoor coil temperature based on the ambient temperature detected by the second sensor;

[0051] Step S710: controlling the air conditioner to continue running with the estimated and assigned value;

[0052] Step S6122: when the change rate V is less than or equal to the first change limit value, controlling the air conditioner to continue running.

[0053] The third temperature limit value is less than the preset temperature. In the cooling mode, when it is detected that the indoor coil temperature is greater than or equal to the first temperature limit value, it is proved that the detected indoor coil temperature at this time is within the normal range, and the air conditioner can be controlled to continue running. During the running of the air conditioner, it is still necessary to detect whether the indoor coil temperature is within the normal range to avoid the abnormal condition of the indoor coil temperature during the running of the air conditioner. When the indoor coil temperature is between the preset temperature and the third temperature limit value, it is proved that the indoor coil temperature is normal, and the air conditioner can be controlled to run according to the current obtained temperature. When the indoor coil temperature is greater than or equal to the preset temperature or less than or equal to the third temperature limit value, it is proved that the indoor coil temperature may be abnormal, and it is necessary to continue to judge. The judgment method is as follows: the change rate of the obtained indoor coil temperature within T2 time is calculated, and the change rate is compared with the first change limit value. For example, T2 time is set to 1 min, and the first change limit value is set to 2℃. When the change of the indoor coil temperature within 1 min exceeds 2℃, it is proved that the indoor coil temperature detection at this time is abnormal, and the indoor coil temperature needs to be estimated and assigned. The indoor coil temperature is taken as the non-detection value according to the estimated and assigned value. Since the change of the indoor coil temperature is slow, when the change rate exceeds the first change limit value, it is proved that the first sensor for detecting the indoor coil temperature may be faulty, and therefore the indoor coil temperature is estimated and assigned. The estimation and assignment method has been introduced above, and will not be described here.

[0054] For example, Figure 4The diagram illustrates one embodiment of the control method for detecting and correcting the indoor unit coil temperature of an air conditioner according to the present invention in heating mode, specifically including the following steps:

[0055] Step S120: Select the heating mode of the air conditioner and set the preset temperature of the air conditioner;

[0056] Step S220: Obtain the indoor unit coil temperature detected by the first sensor and obtain the ambient temperature detected by the second sensor in real time;

[0057] Step S320: Confirm whether the indoor unit coil temperature is greater than the second temperature limit value;

[0058] Step S430: When the indoor unit coil temperature is greater than the second temperature limit value, the indoor unit coil temperature is estimated and assigned a value.

[0059] Step S530: Control the air conditioner to continue operating at the estimated value.

[0060] In heating mode, when the indoor unit coil temperature exceeds the second temperature limit, the indoor unit coil temperature is outside the limit temperature range and needs to be estimated. At this time, the estimated value of the indoor unit coil temperature can be set to the sum of the ambient temperature and the second correction value. Since the difference between the indoor unit coil temperature and the ambient temperature is small, the estimated value of the indoor unit coil temperature is set to the ambient temperature plus the second correction value. After that, the indoor unit coil temperature obtained by the air conditioner is no longer the temperature detected by the first sensor, but the estimated value. When the air conditioner is used for heating, the heat exchanger of the indoor unit acts as a condenser. The condenser uses the principle of condensation and heat release to raise the indoor temperature. Therefore, the detected indoor unit coil temperature is lower than the ambient temperature of the air conditioner. Thus, the estimated value of the indoor unit coil temperature under heating conditions is lower than the ambient temperature. In this case, the second correction value is negative. For example, the estimated value can be set as: estimated value = indoor unit coil temperature + (-2)℃ = indoor unit coil temperature - 2℃. The above is not restrictive and can be set according to the needs of those skilled in the art.

[0061] like Figure 5 The diagram illustrates another embodiment of the control method for detecting and correcting the indoor unit coil temperature of an air conditioner in heating mode, as described in this invention. Specifically, it includes the following steps:

[0062] Step S120: Select the heating mode of the air conditioner and set the preset temperature of the air conditioner;

[0063] Step S220: Obtain the indoor unit coil temperature detected by the first sensor and obtain the ambient temperature detected by the second sensor in real time;

[0064] Step S320: confirming whether the indoor coil temperature is greater than the second temperature limit value;

[0065] Step S430: when the indoor coil temperature is greater than the second temperature limit value, the indoor coil temperature is estimated and assigned;

[0066] Step S530: controlling the air conditioner to continue running with the estimated and assigned indoor coil temperature;

[0067] Step S440: when the indoor coil temperature is less than or equal to the second temperature limit value, controlling the air conditioner to continue running for T1 time;

[0068] Step S540: detecting the indoor coil temperature after the air conditioner runs for T1 time;

[0069] Step S620: comparing the indoor coil temperature with the fourth temperature limit value and the preset temperature;

[0070] Step S621: when the indoor coil temperature is less than the fourth temperature limit value and greater than the preset temperature, controlling the air conditioner to continue running;

[0071] Step S622: when the indoor coil temperature is greater than or equal to the fourth temperature limit value or the indoor coil temperature is less than or equal to the preset temperature, controlling the air conditioner to calculate the change rate V of the indoor coil temperature within T3 time;

[0072] Step S6221: when the change rate V is greater than the second change limit value, estimating and assigning the indoor coil temperature based on the ambient temperature detected by the second sensor;

[0073] Step S720: controlling the air conditioner to continue running with the estimated and assigned indoor coil temperature;

[0074] Step S6222: when the change rate V is less than or equal to the second change limit value, controlling the air conditioner to continue running.

[0075] The working principle in the heating case is similar to that in the refrigeration case, the fourth temperature limit value is greater than the preset temperature, when the indoor unit coil temperature detected is less than or equal to the second temperature limit value, it is proved that the indoor unit coil temperature detected is in the normal range, the air conditioner can be controlled to continue to run, and the indoor unit coil temperature needs to be detected in the normal range during the running of the air conditioner to avoid the abnormal condition of the indoor unit coil temperature during the running of the air conditioner, when the indoor unit coil temperature is between the preset temperature and the fourth temperature limit value, it is proved that the indoor unit coil temperature is normal, and the air conditioner can continue to run, when the indoor unit coil temperature is greater than or equal to the fourth temperature limit value or less than or equal to the preset temperature, it is proved that the indoor unit coil temperature may be abnormal, and needs to be judged continuously, and the judgment mode is as follows, the change rate of the indoor unit coil temperature obtained within T3 time is calculated, and the change rate is compared with the second change limit value, for example, T3 time is set to 1 min, and the second change limit value is set to 2 DEG C, when the change of the indoor unit coil temperature within 1 min exceeds 2 DEG C, it is proved that the indoor unit coil temperature detection is abnormal, the indoor unit coil temperature needs to be estimated and assigned, and the indoor unit coil temperature is taken as the non-detection value until the indoor temperature reaches the preset temperature.

[0076] It should be noted that when the air conditioner needs to be controlled to continue to run with the estimated assignment, the air conditioner is controlled to start the alarm mode before, after or at the same time as the environmental temperature reaches the preset temperature, so that the user can check the first sensor according to the alarm, and the normal running of the air conditioner next time is ensured.

[0077] In summary, the present application can judge whether the first temperature sensor is abnormal by judging whether the detected indoor unit coil temperature is in the limit temperature range, in order to avoid that the air conditioner stops running automatically after detecting that the indoor unit coil temperature is not in the corresponding limit temperature range, the present application estimates and assigns the indoor unit coil temperature after detecting that the indoor unit coil temperature is abnormal, and then the air conditioner continues to run with the estimated assignment instead of the detection value, the above setting can avoid the problem that the air conditioner stops running after detecting that the indoor unit coil temperature is abnormal, and then affects the indoor effect.

[0078] So far, the technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical scheme after the changes or replacements will fall within the protection scope of the present application.

Claims

1. A control method for detecting and correcting the temperature of an indoor coil of an air conditioner, the air conditioner including a first sensor for detecting the temperature of the indoor coil of the air conditioner, and a second sensor for detecting the temperature of an environment in which the air conditioner is located, characterized in that, The control method comprises: selecting an operation mode of the air conditioner, and setting a preset temperature of the air conditioner; obtaining an indoor unit coil temperature detected by the first sensor, and obtaining an ambient temperature detected by the second sensor in real time; determining whether the indoor unit coil temperature is within a range of limit temperatures corresponding to the operation mode; when the indoor unit coil temperature is not within the range of limit temperatures corresponding to the operation mode, performing estimated assignment on the indoor unit coil temperature based on the ambient temperature detected by the second sensor; controlling the air conditioner to continue operating according to the estimated assignment; and / or when the change rate V is less than or equal to the first change limit value, controlling the air conditioner to continue operating. The third temperature limit value is less than the preset temperature. The range of limit temperatures corresponding to the heating mode is greater than a second temperature limit value. When the operation mode of the air conditioner is selected as the cooling mode, the step of "when the indoor unit coil temperature is not within the range of limit temperatures corresponding to the operation mode, performing estimated assignment on the indoor unit coil temperature based on the ambient temperature detected by the second sensor" further comprises: when the indoor unit coil temperature is less than the first temperature limit value, performing estimated assignment on the indoor unit coil temperature, wherein the estimated assignment of the indoor unit coil temperature is set as a sum of the ambient temperature and a first correction value.

4. The control method for detecting and correcting an indoor unit coil temperature of an air conditioner according to claim 2, further comprising: when the indoor unit coil temperature is less than the preset temperature while being greater than a third temperature limit value, controlling the air conditioner to continue operating. When the operation mode of the air conditioner is selected as the heating mode, the step of "when the indoor unit coil temperature is not within the range of limit temperatures corresponding to the operation mode, performing estimated assignment on the indoor unit coil temperature based on the ambient temperature detected by the second sensor" further comprises:

2. The control method for detecting and correcting the temperature of the indoor coil of an air conditioner according to claim 1, wherein when the indoor unit coil temperature is greater than the second temperature limit value, performing estimated assignment on the indoor unit coil temperature, 3. The control method for detecting and correcting the temperature of the indoor coil of an air conditioner according to claim 2, wherein wherein the estimated assignment of the indoor unit coil temperature is set as a sum of the ambient temperature and a second correction value. The control method further comprises: ​ ​ ​ 5. The control method for detecting and correcting the temperature of the indoor coil of an air conditioner according to claim 2, wherein ​ ​ ​ 6. The control method for detecting and correcting the temperature of the indoor coil of an air conditioner according to claim 5, wherein ​ controlling the air conditioner to continue running when the indoor unit coil temperature is less than or equal to the second temperature limit value; detecting the indoor unit coil temperature after the air conditioner runs for the T1 time; comparing the indoor unit coil temperature with a fourth temperature limit value and the preset temperature; controlling the air conditioner to continue running when the indoor unit coil temperature is less than the fourth temperature limit value and greater than the preset temperature. The fourth temperature limit value is greater than the preset temperature.

7. The control method for detecting and correcting the temperature of the indoor coil of an air conditioner according to claim 6, wherein The control method further comprises: controlling the air conditioner to calculate a change rate V of the indoor unit coil temperature within a T3 time when the indoor unit coil temperature is greater than or equal to the fourth temperature limit value or the indoor unit coil temperature is less than or equal to the preset temperature; controlling the air conditioner to continue running based on the estimated assignment of the indoor unit coil temperature when the change rate V is greater than a second change limit value; controlling the air conditioner to continue running based on the estimated assignment.

8. The control method for detecting and correcting the temperature of the indoor coil of an air conditioner according to claim 7, wherein The control method further comprises: controlling the air conditioner to continue running when the change rate V is less than or equal to the second change limit value.

9. The control method for detecting and correcting the temperature of the indoor coil of an air conditioner according to any one of claims 2 to 7, characterized by, The control method further comprises: controlling the air conditioner to start an alarm mode before, after or at the same time as the ambient temperature reaches the preset temperature when the air conditioner needs to be controlled to continue running based on the estimated assignment.

Images