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

Abstract

The invention relates to the technical field of air conditioners, in particular to a control method for detecting and correcting the temperature of an indoor unit coil pipe of an air conditioner, and aims to solve the problem that in the prior art, due to the fact that the temperature of the indoor unit coil pipe is abnormal, the air conditioner stops running. In order to achieve the purpose, the air conditioner comprises a first sensor for detecting the temperature of an indoor unit coil pipe and a second sensor for detecting the temperature of the environment where the air conditioner is located, and the control method for detecting and correcting the temperature of the indoor unit coil pipe of the air conditioner comprises the steps that the operation mode of the air conditioner is selected, and the preset temperature of the air conditioner is set; the temperature of an indoor unit coil pipe is obtained, and the environment temperature detected by a second sensor is obtained in real time; whether the temperature of the indoor unit coil pipe is within the limit temperature range corresponding to the operation mode or not is determined; when the temperature of the indoor unit coil pipe is not within the limit temperature range corresponding to the operation mode, pre-estimation assignment is conducted on the temperature of the indoor unit coil pipe based on the environment temperature detected by a second sensor; and the air conditioner is controlled to continue to operate according to the pre-estimated assignment.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioners, and in particular provides a control method for detecting and correcting the temperature of an indoor coil of an air conditioner. Background Art

[0002] With the continuous improvement of living standards, air conditioners are increasingly entering people's lives. During the operation of the air conditioner, temperature sensors are usually used to detect indoor temperature, indoor coil temperature, etc., 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 stoppage of the air conditioner will affect the indoor cooling or heating effect, thereby affecting the user experience.

[0003] Accordingly, the art needs a new control method for detecting and correcting the temperature of the indoor coil of the air conditioner to solve the problem in the prior art that the air conditioner stops running due to abnormal temperature of the indoor coil. Summary of the invention

[0004] The present invention aims to solve the above technical problem, that is, to solve the problem in the prior art that the air conditioner stops running due to abnormal temperature of the indoor unit coil.

[0005] In a first aspect, the present invention provides a control method for detecting and correcting the temperature of an indoor coil of an air conditioner, wherein the air conditioner includes 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 includes: selecting an operating 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 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, estimating the temperature of the indoor coil based on the ambient temperature detected by the second sensor; and controlling the air conditioner to continue operating with the estimated value.

[0006] In the preferred technical solution of the above-mentioned control method for detecting and correcting the temperature of the indoor coil unit of the air conditioner, the operating modes of the air conditioner include a cooling mode and a heating mode, the temperature limit range corresponding to the cooling mode is a range less than a first temperature limit value, and the temperature limit 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 operating 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 operating mode, based on the ambient temperature detected by the second sensor, the indoor coil temperature is estimated and assigned a value" further includes: when the indoor coil temperature is less than a first temperature limit value, the indoor coil temperature is estimated and assigned a value, wherein the estimated value of the indoor coil temperature is set to the sum of the ambient temperature and the first correction value.

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

[0009] In the preferred technical solution of the control method for detecting and correcting the indoor coil temperature of the air conditioner, the control method further includes: 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 the T2 time; when the change rate V is greater than the first change limit value, based on the ambient temperature detected by the second sensor, the indoor coil temperature is estimated and assigned a value; controlling the air conditioner to continue to operate with the estimated 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 to operate.

[0010] In the preferred technical solution of the control method for detecting and correcting the indoor coil temperature of the air conditioner, when the operating 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 operating mode, based on the ambient temperature detected by the second sensor, the indoor coil temperature is estimated and assigned a value" further includes: when the indoor coil temperature is greater than the second temperature limit value, the indoor coil temperature is estimated and assigned a value, wherein the estimated value of the indoor coil temperature is set to the sum of the ambient temperature and the second correction value.

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

[0012] In the preferred technical solution of the control method for detecting and correcting the indoor coil temperature of the air conditioner, the control method further includes: 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 the T3 time; when the change rate V is greater than the second change limit value, based on the ambient temperature detected by the second sensor, the indoor coil temperature is estimated and assigned a value; and controlling the air conditioner to continue operating with the estimated value.

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

[0014] In the preferred technical solution of the above-mentioned control method for detecting and correcting the indoor coil temperature of the air conditioner, the control method also includes: when it is necessary to control the air conditioner to continue operating with an estimated value, before, after or at the same time as the ambient temperature reaches the preset temperature, controlling the air conditioner to start an alarm mode.

[0015] When adopting the above technical solution, the present invention can determine whether the first temperature sensor is abnormal by determining whether the detected indoor unit coil temperature is within the limit temperature range. In order to prevent the air conditioner from automatically stopping operation after detecting that the indoor unit coil temperature is not within the corresponding limit temperature range, the present invention estimates the indoor unit coil temperature after detecting that the indoor unit coil temperature is abnormal, and then the air conditioner continues to operate with the estimated value instead of the detected value. The above setting can avoid the problem that the air conditioner stops operating after detecting that the indoor unit coil temperature is abnormal, thereby affecting the indoor effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0017] Figure 1It is a flow chart of the main steps of the control method for detecting and correcting the temperature of the indoor coil of the air conditioner of the present invention;

[0018] Figure 2 It is a flow chart of a first specific implementation method of a control method for detecting and correcting the temperature of an indoor unit coil of an air conditioner according to the present invention;

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

[0020] Figure 4 is a flow chart of a third specific implementation method of the control method for detecting and correcting the temperature of the indoor coil of an air conditioner according to the present invention;

[0021] Figure 5 It is a flow chart of a fourth specific implementation method of the control method for detecting and correcting the temperature of the indoor coil of an air conditioner according to the present invention. DETAILED DESCRIPTION

[0022] 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 intended 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.

[0023] It should be noted that in the description of the present invention, the terms "inside" and "outside" and other terms 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 device or element 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, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] like Figure 1-5 As shown, in order to solve the problem in the prior art that the air conditioner stops running due to abnormal temperature of the indoor unit coil, the air conditioner used in the control method for detecting and correcting the indoor unit coil temperature of the air conditioner of the present invention includes a first sensor for detecting the indoor unit coil temperature of the air conditioner, and a second sensor for detecting the ambient temperature of the air conditioner. Whether the indoor unit coil temperature detected by the first sensor is abnormal is judged. When the detected indoor unit coil temperature is abnormal, the indoor unit coil temperature can be assigned a value according to the ambient temperature of the air conditioner, thereby ensuring that the air conditioner continues to run.

[0025] like Figure 1FIG. 1 is a flow chart of the main steps of the control method for detecting and correcting the temperature of the indoor coil of the air conditioner according to the present invention, which specifically includes the following steps:

[0026] Step S100: Selecting an operating mode of the air conditioner and setting a preset temperature of the air conditioner;

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

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

[0029] Step S400: when the temperature of the indoor unit coil is not within the limit temperature range corresponding to the operation mode, the temperature of the indoor unit coil is estimated and assigned a value based on the ambient temperature detected by the second sensor;

[0030] Step S500: Control the air conditioner to continue running with the estimated value.

[0031] Generally, the operation mode of the air conditioner includes a cooling mode and a heating mode. The limit temperature range corresponding to the cooling mode is a range less than the first temperature limit value, and the limit temperature range corresponding to the heating mode is a range greater than the second temperature limit value. In the case of heating, when the detected temperature value of the indoor unit coil is greater than the second temperature limit value, or, in the case of cooling, when the detected temperature of the indoor unit coil is less than the first temperature limit value, it proves that the detected temperature of the indoor unit coil is abnormal. In the prior art, when the temperature of the indoor unit coil is abnormal, the air conditioner will sound an alarm and automatically shut down, thereby affecting the indoor effect. In order to ensure the indoor effect, the present invention can estimate and assign a value to the indoor unit coil temperature after detecting that the temperature of the indoor unit coil is abnormal. At this time, the temperature of the indoor unit coil is output to the processing device of the air conditioner with the estimated value so that the air conditioner can continue to operate. The above setting ensures the continuity of the operation of the air conditioner, thereby ensuring the indoor temperature effect. It should be noted that the ambient temperature of the air conditioner mentioned above is approximately the indoor ambient temperature close to the indoor unit of the air conditioner.

[0032] like Figure 2 As shown, a control method for detecting and correcting the temperature of the indoor coil of an air conditioner in the cooling mode of the present invention is implemented, which specifically includes the following steps:

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

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

[0035] Step S310: confirm whether the temperature of the indoor unit coil is less than the first temperature limit value;

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

[0037] Step S510: Control the air conditioner to continue running with the estimated value.

[0038] In cooling mode, when the indoor unit coil temperature is less than the first temperature limit value, the indoor unit coil temperature is not within the limit temperature range, and an estimated value needs to be assigned to the indoor unit coil temperature. At this time, the estimated value of the indoor unit coil temperature can be set to the sum of the ambient temperature and the first 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 add the first correction value on the basis of the ambient temperature. After that, the indoor unit coil temperature obtained in the air conditioner is no longer the temperature detected by the first sensor but an estimated value. Generally, when the air conditioner needs to be turned on for cooling, the heat exchanger of the indoor unit is used as an evaporator. The evaporator uses the principle of evaporation and heat absorption to cool the room. Therefore, the detected indoor unit coil temperature is greater than the ambient temperature of the air conditioner. Therefore, the estimated value of the indoor unit coil temperature under cooling conditions is a value greater than the ambient temperature. At this time, the first correction value is a positive number. For example, the estimated value can be set to estimated value = indoor unit coil temperature + 2°C. The above is not restrictive and can be set according to the needs of technicians in this field.

[0039] like Figure 3 FIG. 1 is another embodiment of the control method for detecting and correcting the temperature of the indoor coil of an air conditioner in the cooling mode of the present invention, which specifically includes the following steps:

[0040] Step S110: Select the cooling mode of the air conditioner and set the preset temperature of the air conditioner;

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

[0042] Step S310: confirm whether the temperature of the indoor unit coil is less than the first temperature limit value;

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

[0044] Step S510: Control the air conditioner to continue to operate with the estimated value;

[0045] Step S420: When the temperature of the indoor unit coil is greater than or equal to the first temperature limit value, the air conditioner is controlled to continue to operate for T1 time;

[0046] Step S520: After the air conditioner runs for T1 time, the temperature of the indoor unit coil is detected;

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

[0048] Step S611: When the temperature of the indoor unit coil is lower than the preset temperature and higher than the third temperature limit value, the air conditioner is controlled to continue to operate;

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

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

[0051] Step S710: Control the air conditioner to continue to operate with the estimated value;

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

[0053] The above-mentioned third temperature limit value is less than the preset temperature. In the cooling mode, when it is detected that the indoor unit coil temperature is greater than or equal to the first temperature limit value, it proves that the indoor unit coil temperature detected at this time is within the normal range, and the air conditioner can be controlled to continue to run. During the operation of the air conditioner, it is still necessary to detect whether the indoor unit coil temperature is within the normal range to avoid abnormal acquisition of the indoor unit coil temperature during the operation of the air conditioner. When the indoor unit coil temperature is between the preset temperature and the third temperature limit value, it proves that the indoor unit coil temperature is acquired normally. At this time, the air conditioner can continue to be controlled to operate according to the currently acquired temperature. When the indoor unit coil temperature is greater than or equal to the preset temperature or less than or equal to the third temperature limit value, it proves that the indoor unit coil temperature may be abnormal. Often, it is necessary to continue to judge. The judgment method is as follows: calculate the change rate of the obtained indoor unit coil temperature within T2 time, and compare the change rate with the first change limit value. For example, set T2 time to 1min, and set the first change limit value to 2℃. When the change of the indoor unit coil temperature within 1min exceeds 2℃, it proves that the indoor unit coil temperature detection is abnormal at this time, and it is necessary to estimate and assign a value to the indoor unit coil temperature. At this time, the indoor unit coil temperature is based on the estimated assignment as the non-detection value. Since the change of the indoor unit coil temperature is slow, when the change rate exceeds the first change limit value, it proves that the first sensor detecting the indoor unit coil temperature at this time may be faulty. Therefore, the indoor unit coil temperature is estimated and assigned a value. The estimated assignment method has been introduced above and will not be repeated here.

[0054] like Figure 4As shown, a control method for detecting and correcting the temperature of the indoor coil of an air conditioner in the heating mode of the present invention is an implementation mode, which specifically includes the following steps:

[0055] Step S120: Selecting a heating mode of the air conditioner and setting a preset temperature of the air conditioner;

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

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

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

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

[0060] In the heating mode, when the indoor unit coil temperature is greater than the second temperature limit value, the indoor unit coil temperature is not within the limit temperature range, and an estimated value needs to be assigned to the indoor unit coil temperature. 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 in the air conditioner is no longer the temperature detected by the first sensor but an estimated value. Generally, when the air conditioner needs to be turned on for heating, the heat exchanger of the indoor unit serves as a condenser. The condenser uses the principle of condensation heat release to heat the indoor room. Therefore, the detected indoor unit coil temperature is lower than the ambient temperature of the air conditioner. Therefore, the estimated value of the indoor unit coil temperature in the heating condition is lower than the ambient temperature. At this time, the second correction value is a negative number. For example, the estimated value can be set to estimated value = indoor unit coil temperature + (-2)°C = indoor unit coil temperature -2°C. The above is not restrictive and can also be set according to the needs of technicians in this field.

[0061] like Figure 5 FIG. 2 is another embodiment of the control method for detecting and correcting the temperature of the indoor coil of an air conditioner in the heating mode of the present invention, which specifically includes the following steps:

[0062] Step S120: Selecting a heating mode of the air conditioner and setting a preset temperature of the air conditioner;

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

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

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

[0066] Step S530: Control the air conditioner to continue to operate with the estimated value;

[0067] Step S440: When the temperature of the indoor unit coil is less than or equal to the second temperature limit value, the air conditioner is controlled to continue to operate for T1 time;

[0068] Step S540: After the air conditioner runs for T1 time, the temperature of the indoor unit coil is detected;

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

[0070] Step S621: When the temperature of the indoor unit coil is lower than the fourth temperature limit value and higher than the preset temperature, the air conditioner is controlled to continue to operate;

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

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

[0073] Step S720: Control the air conditioner to continue to operate with the estimated value;

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

[0075] The working principle under the heating condition is similar to that under the cooling condition. The above-mentioned fourth temperature limit value is greater than the preset temperature. When it is detected that the indoor unit coil temperature is less than or equal to the second temperature limit value, it is proved that the indoor unit coil temperature detected at this time is within the normal range, and the air conditioner can be controlled to continue to operate. During the operation of the air conditioner, it is still necessary to detect whether the indoor unit coil temperature is within the normal range to avoid abnormal acquisition of the indoor unit coil temperature during the operation 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 be controlled to operate. When the indoor unit coil temperature is greater than or equal to the fourth temperature limit value, the indoor unit coil temperature is normal. When the temperature is equal to or less than the preset temperature, it proves that the indoor unit coil temperature may be abnormal and needs to be further judged. The judgment method is as follows: calculate the change rate of the obtained indoor unit coil temperature within T3 time, and compare the change rate with the second change limit value. For example, set T3 time to 1min, and set the second change limit change value to 2℃. When the change of the indoor unit coil temperature within 1min exceeds 2℃, it proves that the indoor unit coil temperature detection is abnormal at this time, and the indoor unit coil temperature needs to be estimated and assigned. At this time, the indoor unit coil temperature is based on the estimated assignment 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 value, the air conditioner is controlled to start the alarm mode before, after or at the same time as the ambient temperature reaches the preset temperature, so as to ensure that the user can check the first sensor according to the alarm to ensure the normal operation of the air conditioner next time.

[0077] In summary, the present invention can determine whether the first temperature sensor is abnormal by determining whether the detected indoor unit coil temperature is within the limit temperature range. In order to prevent the air conditioner from automatically stopping operation after detecting that the indoor unit coil temperature is not within the corresponding limit temperature range, the present invention estimates the indoor unit coil temperature after detecting that the indoor unit coil temperature is abnormal, and then the air conditioner continues to operate with the estimated value instead of the detected value. The above-mentioned arrangement can avoid the problem that the air conditioner stops operating after detecting that the indoor unit coil temperature is abnormal, thereby affecting the indoor effect.

[0078] 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 control method for detecting and correcting the temperature of an indoor unit coil of an air conditioner, wherein the air conditioner comprises a first sensor for detecting the temperature of the indoor unit coil of the air conditioner, and a second sensor for detecting the ambient temperature of the air conditioner, wherein: The control method comprises: Selecting an operating mode of the air conditioner and setting a preset temperature of the air conditioner; Acquire the indoor unit coil temperature detected by the first sensor, and acquire the ambient temperature detected by the second sensor in real time; Confirm whether the temperature of the indoor unit coil is within the limit temperature range corresponding to the operation mode; When the temperature of the indoor unit coil is not within the limit temperature range corresponding to the operation mode, the temperature of the indoor unit coil is estimated and assigned a value based on the ambient temperature detected by the second sensor; The air conditioner is controlled to continue operating with the estimated value.

2. The control method for detecting and correcting the temperature of the indoor coil unit of the air conditioner according to claim 1, characterized in that: The operation modes of the air conditioner include a cooling mode and a heating mode. The limit temperature range corresponding to the cooling mode is a range smaller than a first temperature limit value, and the limit temperature range corresponding to the heating mode is a range larger than a second temperature limit value.

3. The control method for detecting and correcting the temperature of the indoor coil of the air conditioner according to claim 2, characterized in that: When the operation mode of the air conditioner is selected as the cooling mode, the step of "when the temperature of the indoor unit coil is not within the limit temperature range corresponding to the operation mode, based on the ambient temperature detected by the second sensor, estimating and assigning a value to the temperature of the indoor unit coil" further includes: When the temperature of the indoor unit coil is less than the first temperature limit value, the temperature of the indoor unit coil is estimated and assigned a value. The estimated value of the indoor unit coil temperature is set to the sum of the ambient temperature and the first correction value.

4. The control method for detecting and correcting the temperature of the indoor coil unit of the air conditioner according to claim 2, further comprising: When the operation mode of the air conditioner is selected as the cooling mode, and when the temperature of the indoor unit coil is greater than or equal to the first temperature limit value, controlling the air conditioner to continue to operate for T1 time; After the air conditioner has been running for T1 time, detecting the temperature of the indoor unit coil; Comparing the temperature of the indoor unit coil with the preset temperature and a third temperature limit value; When the temperature of the indoor unit coil is lower than the preset temperature and higher than a third temperature limit value, controlling the air conditioner to continue to operate; Wherein, the third temperature limit value is lower than the preset temperature.

5. The control method for detecting and correcting the temperature of the indoor coil of the air conditioner according to claim 4, characterized in that: The control method further comprises: When the temperature of the indoor unit coil is greater than or equal to the preset temperature or the temperature of the indoor unit coil is less than or equal to the third temperature limit value, controlling the air conditioner to calculate the change rate V of the temperature of the indoor unit coil within T2; When the change rate V is greater than a first change limit value, the temperature of the indoor unit coil is estimated and assigned a value based on the ambient temperature detected by the second sensor; Controlling the air conditioner to continue to operate with the estimated value; and / or, When the change rate V is less than or equal to the first change limit value, the air conditioner is controlled to continue running.

6. The control method for detecting and correcting the temperature of the indoor coil unit of the air conditioner according to claim 2, characterized in that: When the operation mode of the air conditioner is selected as the heating mode, the step of "when the temperature of the indoor unit coil is not within the limit temperature range corresponding to the operation mode, based on the ambient temperature detected by the second sensor, estimating and assigning a value to the temperature of the indoor unit coil" further includes: When the temperature of the indoor unit coil is greater than the second temperature limit value, the temperature of the indoor unit coil is estimated and assigned a value. The estimated value of the indoor unit coil temperature is set to the sum of the ambient temperature and the second correction value.

7. The control method for detecting and correcting the temperature of the indoor coil unit of the air conditioner according to claim 6, characterized in that: The control method further comprises: When the temperature of the indoor unit coil is less than or equal to the second temperature limit value, controlling the air conditioner to continue running for T1 time; After the air conditioner has been running for T1 time, detecting the temperature of the indoor unit coil; Comparing the temperature of the indoor unit coil with a fourth temperature limit value and the preset temperature; When the temperature of the indoor unit coil is lower than the fourth temperature limit value and higher than the preset temperature, controlling the air conditioner to continue to operate; Wherein, the fourth temperature limit value is greater than the preset temperature.

8. The control method for detecting and correcting the temperature of the indoor coil of the air conditioner according to claim 7, characterized in that: The control method further comprises: When the temperature of the indoor unit coil is greater than or equal to the fourth temperature limit value or the temperature of the indoor unit coil is less than or equal to the preset temperature, controlling the air conditioner to calculate the change rate V of the temperature of the indoor unit coil within T3; When the change rate V is greater than a second change limit value, the temperature of the indoor unit coil is estimated and assigned a value based on the ambient temperature detected by the second sensor; The air conditioner is controlled to continue operating with the estimated value.

9. The control method for detecting and correcting the temperature of the indoor coil unit of the air conditioner according to claim 8, characterized in that: 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.

10. 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 8, characterized in that: The control method further comprises: When it is necessary to control the air conditioner to continue to operate with the estimated value, before, after or at the same time as the ambient temperature reaches the preset temperature, the air conditioner is controlled to start the alarm mode.

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