Method and device for detecting exhaust gas sensor detachment, air conditioner, and storage medium

Abstract

The present application relates to the technical field of air conditioners, and discloses a method for detecting the detachment of an exhaust gas sensor, comprising: obtaining the real-time operating parameters of the air conditioner at intervals of a first preset time. Determining the current operating parameters and the historical operating parameters based on the real-time operating parameters. The current operating parameters are the real-time operating parameters obtained at the current moment. The historical operating parameters are the real-time operating parameters obtained at preset historical moments. Determining whether the exhaust gas sensor has detached based on the current operating parameters and the historical operating parameters. In this way, it is possible to check whether the exhaust gas sensor has detached based on the current moment and the changes between the current operating parameters and the historical operating parameters at historical moments, thereby improving the accuracy of detecting whether the exhaust gas sensor has detached. The present application also discloses a device for detecting the detachment of an exhaust gas sensor, an air conditioner, and a storage medium.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, for example, to a method and device for detecting the detachment of an exhaust gas sensor, an air conditioner, and a storage medium. Background Art

[0002] At present, air conditioners have become an indispensable household appliance in people's daily lives. An exhaust sensor is provided in the air conditioner. The exhaust sensor is generally fixed on the exhaust pipe of the compressor to facilitate the collection of the exhaust temperature of the compressor. The air conditioner controls the opening of the electronic expansion valve through the exhaust temperature collected by the exhaust sensor to protect the normal operation of the compressor. However, in actual use, the exhaust sensor may fall off due to vibration of the compressor or other abnormal factors, resulting in an error in the exhaust temperature collected by the exhaust sensor. The air conditioner adjusts the opening of the electronic expansion valve according to the erroneous exhaust temperature, which can easily cause the compressor to not operate normally and malfunction. In the related art, the operating parameters of the air conditioner at the current moment are usually collected, and whether the exhaust sensor has fallen off is detected based on the operating parameters at the current moment.

[0003] During the implementation of the disclosed embodiments, at least the following issues were discovered in the related art: The related art detects exhaust sensor detachment based on current operating parameters. Since the air conditioner's operating parameters change slightly in the initial stages of exhaust sensor detachment, changes in these parameters cannot be detected based on the current operating parameters. Therefore, it may be assumed that the exhaust sensor is intact. This results in low accuracy in detecting exhaust sensor detachment.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] Embodiments of the present disclosure provide a method and apparatus, an air conditioner, and a storage medium for detecting when an exhaust gas sensor has fallen off, so as to improve the accuracy of detecting whether the exhaust gas sensor has fallen off.

[0007] In some embodiments, the method for detecting exhaust gas sensor detachment is applied to an air conditioner, comprising: obtaining real-time operating parameters of the air conditioner at first preset intervals; determining current operating parameters and historical operating parameters based on the real-time operating parameters; wherein the current operating parameters are real-time operating parameters obtained at the current moment; and the historical operating parameters are real-time operating parameters obtained at preset historical moments. Determining whether the exhaust gas sensor is detached is based on the current operating parameters and the historical operating parameters.

[0008] In some embodiments, the air conditioner includes a compressor. Acquiring the operating parameters of the air conditioner at first preset intervals includes: acquiring a compressor operating frequency of the compressor when the air conditioner is in operation. Acquiring the operating parameters of the air conditioner at first preset intervals when the compressor operating frequency is greater than or equal to a preset target operating frequency.

[0009] In some embodiments, the air conditioner includes a compressor, an interior fan, an exterior fan, a condensing coil, and an electronic expansion valve. The current operating parameters include: a first target temperature, a first ambient temperature, a first operating frequency of the compressor, a first internal fan speed of the interior fan, a first external fan speed of the external fan, a first coil temperature of the condensing coil, a first valve opening of the electronic expansion valve, and a first exhaust temperature collected by the exhaust gas sensor. The historical operating parameters include: a second target temperature, a second ambient temperature, a second operating frequency of the compressor, a second internal fan speed of the interior fan, a second external fan speed of the external fan, a second coil temperature of the condensing coil, a second valve opening of the electronic expansion valve, and a second exhaust temperature collected by the exhaust gas sensor. Determining whether the exhaust gas sensor is disconnected based on the current and historical operating parameters includes: obtaining the absolute value of the frequency difference between the first operating frequency and the second operating frequency when the first target temperature is equal to the second target temperature, the first internal fan speed is equal to the second internal fan speed, and the first external fan speed is equal to the second external fan speed. When the absolute value of the frequency difference is less than the preset set frequency, it is determined whether the exhaust gas sensor is detached based on the first coil temperature, the first valve opening, the first exhaust temperature, the first ambient temperature, the second coil temperature, the second valve opening, the second exhaust temperature and the second ambient temperature.

[0010] In some embodiments, determining whether the exhaust gas sensor is detached based on the first coil temperature, the first valve opening, the first exhaust gas temperature, the first ambient temperature, the second coil temperature, the second valve opening, the second exhaust gas temperature, and the second ambient temperature includes: obtaining an exhaust gas temperature correction difference based on the first exhaust gas temperature, the second exhaust gas temperature, the first ambient temperature, and the second ambient temperature; obtaining a coil temperature difference between the first coil temperature and the second coil temperature; obtaining a valve opening difference between the first valve opening and the second valve opening; and determining whether the exhaust gas sensor is detached based on the exhaust gas temperature correction difference, the coil temperature difference, and the valve opening difference.

[0011] In some embodiments, obtaining the exhaust temperature correction difference based on the first exhaust temperature, the second exhaust temperature, the first ambient temperature, and the second ambient temperature includes: obtaining an exhaust temperature difference between the first exhaust temperature and the second exhaust temperature; obtaining an ambient temperature difference between the first ambient temperature and the second ambient temperature; and obtaining the exhaust temperature correction difference based on the exhaust temperature difference and the ambient temperature difference.

[0012] In some embodiments, determining whether the exhaust gas sensor is detached based on the exhaust gas temperature correction difference, the coil temperature difference, and the valve opening difference includes: if the valve opening difference is greater than a preset first reference value, the exhaust gas sensor is determined to be detached if the exhaust gas temperature correction difference is greater than the preset first reference temperature and the coil temperature difference is less than the preset first reference temperature. And / or, if the valve opening difference is greater than the preset first reference value, the exhaust gas sensor is determined to be detached if the exhaust gas temperature correction difference is less than or equal to the preset first reference temperature or the coil temperature difference is greater than or equal to the preset first reference temperature.

[0013] In some embodiments, determining whether the exhaust gas sensor is detached based on the exhaust gas temperature correction difference, the coil temperature difference, and the valve opening difference includes: if the valve opening difference is less than a preset second reference value, then if the exhaust gas temperature correction difference is less than the preset second reference temperature and the coil temperature difference is greater than the preset second reference temperature, then determining that the exhaust gas sensor is detached. And / or, if the valve opening difference is less than the preset second reference value, then if the exhaust gas temperature correction difference is greater than or equal to the preset second reference temperature or the coil temperature difference is less than or equal to the preset second reference temperature, then determining that the exhaust gas sensor is not detached.

[0014] In some embodiments, the apparatus for detecting exhaust gas sensor detachment includes a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for detecting exhaust gas sensor detachment when running the program instructions.

[0015] In some embodiments, the air conditioner includes an air conditioner body, and the device for detecting the detachment of the exhaust gas sensor is installed in the air conditioner body.

[0016] In some embodiments, the storage medium stores program instructions, and when the program instructions are run, the method for detecting exhaust gas sensor detachment is executed.

[0017] The method and device, air conditioner, and storage medium for detecting the detachment of an exhaust gas sensor provided by the embodiments of the present disclosure can achieve the following technical effects: by obtaining the real-time operating parameters of the air conditioner at intervals of a first preset time. Then, it is determined whether the exhaust gas sensor has detached based on the current operating parameters obtained at the current moment and the historical operating parameters obtained at the historical moments. In this way, compared to directly detecting whether the exhaust gas sensor has detached based on the operating parameters at the current moment, this solution determines whether the exhaust gas sensor has detached based on the current operating parameters at the current moment and the historical operating parameters at the historical moments. It is possible to check whether the exhaust gas sensor has detached based on the change between the current operating parameters at the current moment and the historical operating parameters at the historical moments, thereby improving the accuracy of detecting whether the exhaust gas sensor has detached.

[0018] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0020] Figure 1 is a schematic diagram of a method for detecting exhaust gas sensor detachment provided by an embodiment of the present disclosure;

[0021] Figure 2 is a schematic diagram of another method for detecting exhaust gas sensor detachment provided by an embodiment of the present disclosure;

[0022] Figure 3 is a schematic diagram of another method for detecting exhaust gas sensor detachment provided by an embodiment of the present disclosure;

[0023] Figure 4 is a schematic diagram of another method for detecting exhaust gas sensor detachment provided by an embodiment of the present disclosure;

[0024] Figure 5 is a schematic diagram of a device for detecting exhaust gas sensor detachment provided by an embodiment of the present disclosure;

[0025] Figure 6 Schematic diagram of an air conditioner provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0027] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0028] Unless otherwise stated, the term "plurality" means two or more.

[0029] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0030] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0031] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0032] The present application is applied to an air conditioner. The air conditioner obtains the real-time operating parameters of the air conditioner at intervals of a first preset time. The current operating parameters and the historical operating parameters are determined based on the real-time operating parameters. The current operating parameters are the real-time operating parameters obtained at the current moment. The historical operating parameters are the real-time operating parameters obtained at preset historical moments. Then, based on the current operating parameters and the historical operating parameters, it is determined whether the exhaust sensor has fallen off. In this way, it is possible to check whether the exhaust sensor has fallen off based on the current moment and the change between the current operating parameters and the historical operating parameters at historical moments, thereby improving the accuracy of detecting whether the exhaust sensor has fallen off.

[0033] The air conditioner includes a compressor, an internal fan, an external fan, a condenser, a condensing side coil and an electronic expansion valve. The condensing side coil is the coil located on the condenser side.

[0034] Combine Figure 1As shown, an embodiment of the present disclosure provides a method for detecting exhaust gas sensor detachment, comprising:

[0035] Step S101: The air conditioner obtains real-time operating parameters of the air conditioner every first preset time period.

[0036] In step S102, the air conditioner determines current operating parameters and historical operating parameters based on real-time operating parameters. The current operating parameters are real-time operating parameters acquired at the current moment, and the historical operating parameters are real-time operating parameters acquired at preset historical moments.

[0037] In step S103 , the air conditioner determines whether the exhaust gas sensor is detached based on the current operating parameters and the historical operating parameters.

[0038] The method for detecting exhaust gas sensor detachment provided by the embodiment of the present disclosure is used to obtain the real-time operating parameters of the air conditioner at intervals of a first preset time. It is then determined whether the exhaust gas sensor has detached based on the current operating parameters obtained at the current moment and the historical operating parameters obtained at previous moments. Thus, compared to directly detecting whether the exhaust gas sensor has detached based on the current operating parameters at the current moment, this solution determines whether the exhaust gas sensor has detached based on the current operating parameters at the current moment and the historical operating parameters at previous moments. Whether the exhaust gas sensor has detached can be checked based on the changes between the current moment and the current operating parameters and the historical operating parameters at previous moments, thereby improving the accuracy of detecting whether the exhaust gas sensor has detached.

[0039] Real-time operating parameters, including: real-time ambient temperature, real-time operating frequency of the compressor, real-time internal fan speed of the internal fan, real-time external fan speed of the external fan, real-time coil temperature of the condensing side coil, real-time valve opening of the electronic expansion valve, and real-time exhaust temperature collected by the exhaust sensor.

[0040] Optionally, the real-time operating parameters of the air conditioner are obtained every first preset time period, including: the real-time ambient temperature, the real-time operating frequency of the compressor, the real-time internal fan speed of the internal fan, the real-time external fan speed of the external fan, the real-time coil temperature of the condensing side coil, the real-time valve opening of the electronic expansion valve and the real-time exhaust temperature collected by the exhaust sensor every first preset time period.

[0041] Furthermore, determining the current operating parameters and the historical operating parameters based on the real-time operating parameters includes: determining the real-time operating parameters obtained at the current moment as the current operating parameters. Determining the real-time operating parameters obtained at a preset historical moment as the historical operating parameters. The preset historical moment is before the current moment, and the time difference between the historical moment and the current moment is a second preset duration. t2 = a × t1. t2 is the second preset duration. t1 is the first preset duration. a is an integer greater than 1. In some embodiments, t2 is 60 seconds. t1 is 10 seconds. a is 6.

[0042] The current operating parameters include: a first target temperature, a first ambient temperature, a first operating frequency of the compressor, a first internal fan speed of the internal fan, a first external fan speed of the external fan, a first coil temperature of the condensing side coil, a first valve opening of the electronic expansion valve, and a first exhaust temperature collected by the exhaust sensor.

[0043] Furthermore, the real-time operating parameters obtained at the current moment are determined as the current operating parameters, including: determining the real-time target temperature obtained at the current moment as the first target temperature. Determining the real-time ambient temperature obtained at the current moment as the first ambient temperature. Determining the real-time operating frequency of the compressor obtained at the current moment as the first operating frequency of the compressor. Determining the real-time internal fan speed of the internal fan obtained at the current moment as the first internal fan speed of the internal fan. Determining the real-time external fan speed of the external fan obtained at the current moment as the first external fan speed of the external fan. Determining the real-time coil temperature of the condensing side coil obtained at the current moment as the first coil temperature of the condensing side coil. Determining the real-time valve opening of the electronic expansion valve obtained at the current moment as the first valve opening of the electronic expansion valve. Determining the real-time exhaust temperature collected by the exhaust sensor obtained at the current moment as the first exhaust temperature collected by the exhaust sensor.

[0044] Historical operating parameters include: a second target temperature, a second ambient temperature, a second operating frequency of the compressor, a second internal fan speed of the internal fan, a second external fan speed of the external fan, a second coil temperature of the condensing side coil, a second valve opening of the electronic expansion valve, and a second exhaust temperature collected by the exhaust sensor.

[0045] Furthermore, the real-time operating parameters obtained at a preset historical moment are determined as historical operating parameters, including: determining the real-time target temperature obtained at a preset historical moment as the second target temperature. Determining the real-time ambient temperature obtained at a preset historical moment as the second ambient temperature. Determining the real-time operating frequency of the compressor obtained at a preset historical moment as the second operating frequency of the compressor. Determining the real-time internal fan speed of the internal fan obtained at a preset historical moment as the second internal fan speed of the internal fan. Determining the real-time external fan speed of the external fan obtained at a preset historical moment as the second external fan speed of the external fan. Determining the real-time coil temperature of the condensing side coil obtained at a preset historical moment as the second coil temperature of the condensing side coil. Determining the real-time valve opening of the electronic expansion valve obtained at a preset historical moment as the second valve opening of the electronic expansion valve. Determining the real-time exhaust temperature collected by the exhaust sensor obtained at a preset historical moment as the second exhaust temperature collected by the exhaust sensor.

[0046] Optionally, the air conditioner includes a compressor; obtaining the operating parameters of the air conditioner at intervals of a first preset time duration includes: when the air conditioner is in operation, obtaining the compressor operating frequency of the compressor. When the compressor operating frequency is greater than or equal to a preset target operating frequency, obtaining the operating parameters of the air conditioner at intervals of a first preset time duration. In this way, since the compressor operating frequency is less than the preset target operating frequency, the air conditioner needs to quickly increase the compressor operating frequency. However, a rapid increase in the compressor operating frequency will cause a rapid change in the operating parameters of the air conditioner. By obtaining the operating parameters of the air conditioner at intervals of a first preset time duration when the compressor operating frequency is greater than or equal to the preset target operating frequency, the impact of increasing the compressor operating frequency on the operating parameters can be reduced. This improves the accuracy of determining whether the exhaust gas sensor has fallen off based on the operating parameters.

[0047] Furthermore, the air conditioner is determined to be in the operating state by the following method: upon receiving a command to turn on the air conditioner from a user via a control device, the user is determined to be in the operating state. The control device may include an air conditioner remote control or a user terminal with an application corresponding to the air conditioner installed. The user terminal may include a mobile phone, tablet, computer, or smartwatch.

[0048] Optionally, determining whether the exhaust gas sensor has fallen off based on current and historical operating parameters includes: obtaining the absolute value of the frequency difference between the first operating frequency and the second operating frequency when the first target temperature is equal to the second target temperature, the first inner fan speed is equal to the second inner fan speed, and the first outer fan speed is equal to the second outer fan speed. If the absolute value of the frequency difference is less than a preset set frequency, determining whether the exhaust gas sensor has fallen off based on the first coil temperature, the first valve opening, the first exhaust gas temperature, the first ambient temperature, the second coil temperature, the second valve opening, the second exhaust gas temperature, and the second ambient temperature. Changes in the target temperature, the inner fan speed, the outer fan speed, and the compressor operating frequency can cause changes in the pressure of the entire air conditioner, thereby making the collected exhaust gas temperature and coil temperature inaccurate. The equality of the first target temperature and the second target temperature, the equality of the first inner fan speed and the second inner fan speed, and the equality of the first outer fan speed and the second outer fan speed indicate that the target temperature, the inner fan speed, and the outer fan speed have not changed. The absolute value of the frequency difference between the first and second operating frequencies is less than the preset set frequency, indicating that the compressor operating frequency has a small change. This results in a higher accuracy in the acquired exhaust gas temperature and coil temperature. This higher accuracy in detecting whether the exhaust gas sensor has fallen off can be used to improve the accuracy of the exhaust gas temperature and coil temperature.

[0049] In some embodiments, the preset set frequency is 3 Hz. The frequency difference between the first operating frequency and the second operating frequency is -2 Hz. That is, the absolute value of the frequency difference between the first operating frequency and the second operating frequency is 2 Hz. 2 Hz is less than 3 Hz, that is, the absolute value of the frequency difference is less than the preset set frequency. The electronic device then determines whether the exhaust gas sensor is detached based on the first coil temperature, the first valve opening, the first exhaust gas temperature, the first ambient temperature, the second coil temperature, the second valve opening, the second exhaust gas temperature, and the second ambient temperature.

[0050] Furthermore, obtaining the absolute value of the frequency difference between the first operating frequency and the second operating frequency includes: obtaining the absolute value of the frequency difference between the first operating frequency and the second operating frequency by calculating |ΔF|=F1-F2. Wherein, |ΔF| is the absolute value of the frequency difference between the first operating frequency and the second operating frequency. ΔF is the frequency difference between the first operating frequency and the second operating frequency. F1 is the first operating frequency. F2 is the second operating frequency.

[0051] Optionally, determining whether the exhaust gas sensor is detached based on the first coil temperature, the first valve opening, the first exhaust gas temperature, the first ambient temperature, the second coil temperature, the second valve opening, the second exhaust gas temperature, and the second ambient temperature includes: obtaining an exhaust gas temperature correction difference based on the first exhaust gas temperature, the second exhaust gas temperature, the first ambient temperature, and the second ambient temperature; obtaining a coil temperature difference between the first coil temperature and the second coil temperature; obtaining a valve opening difference between the first valve opening and the second valve opening; and determining whether the exhaust gas sensor is detached based on the exhaust gas temperature correction difference, the coil temperature difference, and the valve opening difference. Thus, the exhaust gas temperature correction difference, the coil temperature difference between the first coil temperature and the second coil temperature, and the valve opening difference are obtained based on the first exhaust gas temperature, the second exhaust gas temperature, the first ambient temperature, and the second ambient temperature. Then, determining whether the exhaust gas sensor is detached based on the exhaust gas temperature correction difference, the coil temperature difference, and the valve opening difference. In this way, it is possible to check whether the exhaust sensor is detached based on the changes between the first coil temperature, the first valve opening, the first exhaust temperature, the first ambient temperature at the current moment and the second coil temperature, the second valve opening, the second exhaust temperature and the second ambient temperature at the historical moment, thereby improving the accuracy of detecting whether the exhaust sensor is detached.

[0052] Furthermore, obtaining a coil temperature difference between the first coil temperature and the second coil temperature includes: obtaining the coil temperature difference between the first coil temperature and the second coil temperature by calculating ΔL=L1-L2. Wherein, ΔL is the coil temperature difference between the first coil temperature and the second coil temperature. L1 is the first coil temperature. L2 is the second coil temperature.

[0053] Furthermore, after obtaining the valve opening difference between the first valve opening and the second valve opening, the method further includes: determining that the exhaust gas sensor is not detached if the valve opening difference is less than or equal to a preset first reference value and greater than or equal to a preset second reference value. The first reference value is greater than the second reference value. In some embodiments, the first reference value is 20 steps, and the second reference value is -20 steps.

[0054] Optionally, obtaining an exhaust temperature correction difference based on the first exhaust temperature, the second exhaust temperature, the first ambient temperature, and the second ambient temperature includes: obtaining the exhaust temperature difference between the first exhaust temperature and the second exhaust temperature; obtaining the ambient temperature difference between the first ambient temperature and the second ambient temperature; and obtaining an exhaust temperature correction difference based on the exhaust temperature difference and the ambient temperature difference. In this way, since rapid changes in ambient temperature can cause rapid changes in exhaust temperature, obtaining the exhaust temperature correction difference based on the exhaust temperature difference between the first exhaust temperature and the second exhaust temperature and the ambient temperature difference between the first ambient temperature and the second ambient temperature can reduce the impact of changes in ambient temperature on exhaust temperature. This improves the accuracy of detecting whether the exhaust sensor has fallen off.

[0055] Furthermore, obtaining the exhaust temperature difference between the first exhaust temperature and the second exhaust temperature includes: obtaining the exhaust temperature difference between the first exhaust temperature and the second exhaust temperature by calculating ΔT=T1-T2. ΔT is the exhaust temperature difference between the first exhaust temperature and the second exhaust temperature. T1 is the first exhaust temperature. T2 is the second exhaust temperature.

[0056] Furthermore, obtaining the ambient temperature difference between the first ambient temperature and the second ambient temperature includes: obtaining the ambient temperature difference between the first ambient temperature and the second ambient temperature by calculating ΔS=S1-S2, wherein ΔS is the ambient temperature difference between the first ambient temperature and the second ambient temperature, S1 is the first ambient temperature, and S2 is the second ambient temperature.

[0057] Furthermore, obtaining an exhaust temperature correction difference according to the exhaust temperature difference and the ambient temperature difference includes: determining a difference between the exhaust temperature difference and the ambient temperature difference as the exhaust temperature correction difference.

[0058] Furthermore, the difference between the exhaust temperature difference and the ambient temperature difference is determined as the exhaust temperature correction difference, including: obtaining the exhaust temperature correction difference by calculating ΔU=ΔT-ΔS, where ΔU is the exhaust temperature correction difference.

[0059] Optionally, determining whether the exhaust sensor is detached based on the corrected exhaust temperature difference, the coil temperature difference, and the valve opening difference includes: if the valve opening difference is greater than a preset first reference value, the exhaust sensor is determined to be detached if the corrected exhaust temperature difference is greater than the preset first reference temperature and the coil temperature difference is less than the preset first reference temperature. And / or, if the valve opening difference is greater than the preset first reference value, the exhaust sensor is determined to be detached if the corrected exhaust temperature difference is less than or equal to the preset first reference temperature or the coil temperature difference is greater than or equal to the preset first reference temperature. In this way, even when the valve opening difference is greater than the preset first reference value, determining whether the exhaust sensor is detached can be based on the relationship between the corrected exhaust temperature difference, the coil temperature difference, and the first reference temperature.

[0060] In some embodiments, the first reference value is 20 steps. The first reference temperature is -2°C. When the valve opening difference is greater than 20 steps, if the exhaust temperature correction difference is greater than -2°C and the coil temperature difference is less than -2°C, it is determined that the exhaust gas sensor is disconnected. If the exhaust temperature correction difference is less than or equal to -2°C or the coil temperature difference is greater than or equal to -2°C, it is determined that the exhaust gas sensor is not disconnected.

[0061] Combine Figure 2 As shown, an embodiment of the present disclosure provides a method for detecting exhaust gas sensor detachment, comprising:

[0062] In step S201, when the air conditioner is in operation, the air conditioner obtains the operating frequency of the compressor.

[0063] Step S202 : When the compressor operating frequency of the air conditioner is greater than or equal to a preset target operating frequency, the air conditioner obtains operating parameters of the air conditioner at intervals of a first preset time.

[0064] In step S203, the air conditioner determines current operating parameters and historical operating parameters based on the real-time operating parameters. The air conditioner includes a compressor, an indoor fan, an outdoor fan, a condensing coil, and an electronic expansion valve. The current operating parameters include: a first target temperature, a first ambient temperature, a first operating frequency of the compressor, a first indoor fan speed of the indoor fan, a first outdoor fan speed of the outdoor fan, a first coil temperature of the condensing coil, a first valve opening of the electronic expansion valve, and a first exhaust temperature collected by the exhaust gas sensor. The historical operating parameters include: a second target temperature, a second ambient temperature, a second operating frequency of the compressor, a second indoor fan speed of the indoor fan, a second outdoor fan speed of the outdoor fan, a second coil temperature of the condensing coil, a second valve opening of the electronic expansion valve, and a second exhaust temperature collected by the exhaust gas sensor.

[0065] In step S204, the air conditioner obtains the absolute value of the frequency difference between the first operating frequency and the second operating frequency when the first target temperature is equal to the second target temperature, the first inner fan speed is equal to the second inner fan speed, and the first outer fan speed is equal to the second outer fan speed.

[0066] In step S205 , when the absolute value of the frequency difference is less than the preset set frequency, the air conditioner obtains an exhaust temperature correction difference according to the first exhaust temperature, the second exhaust temperature, the first ambient temperature, and the second ambient temperature.

[0067] In step S206 , the air conditioner obtains a coil temperature difference between the first coil temperature and the second coil temperature.

[0068] In step S207 , the air conditioner obtains a valve opening difference between the first valve opening and the second valve opening.

[0069] In step S208 , when the valve opening difference is greater than a preset first reference value, if the exhaust temperature correction difference is greater than the preset first reference temperature and the coil temperature difference is less than the preset first reference temperature, the exhaust gas sensor is determined to be detached.

[0070] In step S209, when the valve opening difference of the air conditioner is greater than the preset first reference value, if the exhaust temperature correction difference is less than or equal to the preset first reference temperature or the coil temperature difference is greater than or equal to the preset first reference temperature, it is determined that the exhaust sensor is not detached.

[0071] According to the method for detecting exhaust gas sensor loss provided by the embodiments of the present disclosure, when the air conditioner is in operation, the air conditioner obtains the compressor operating frequency of the compressor. When the compressor operating frequency is greater than or equal to a preset target operating frequency, the air conditioner operating parameters are obtained at first preset intervals. Based on the real-time operating parameters, current operating parameters including a first target temperature, a first ambient temperature, a first operating frequency of the compressor, a first internal fan speed of the internal fan, a first external fan speed of the external fan, a first coil temperature of the condensing coil, a first valve opening of the electronic expansion valve, and a first exhaust gas temperature and a second target temperature are obtained. Historical operating parameters including a second ambient temperature, a second operating frequency of the compressor, a second internal fan speed of the internal fan, a second external fan speed of the external fan, a second coil temperature of the condensing coil, a second valve opening of the electronic expansion valve, and a second exhaust gas temperature obtained by the exhaust gas sensor are obtained. The accuracy of the obtained first coil temperature, second coil temperature, first exhaust gas temperature, and second exhaust gas temperature is then ensured by determining the equality of the first target temperature and the second target temperature, the first internal fan speed, the second internal fan speed, the first external fan speed, the second external fan speed, the first operating frequency, and the second operating frequency. Then, a correction value for the exhaust temperature difference is calculated based on the first exhaust temperature, the second exhaust temperature, the first ambient temperature, and the second ambient temperature, reducing the impact of ambient temperature variations on exhaust temperature variations. If the valve opening difference is greater than a preset first reference value, the exhaust sensor is determined to be disconnected based on the relationship between the correction value for the exhaust temperature difference and the coil temperature difference and the first reference temperature. This enables detection of exhaust sensor disconnection, thereby improving the accuracy of exhaust sensor disconnection detection.

[0072] Optionally, determining whether the exhaust sensor is detached based on the corrected exhaust temperature difference, the coil temperature difference, and the valve opening difference includes: if the valve opening difference is less than a preset second reference value, determining that the exhaust sensor is detached if the corrected exhaust temperature difference is less than the preset second reference temperature and the coil temperature difference is greater than the preset second reference temperature. And / or, if the valve opening difference is less than the preset second reference value, determining that the exhaust sensor is not detached if the corrected exhaust temperature difference is greater than or equal to the preset second reference temperature or the coil temperature difference is less than or equal to the preset second reference temperature. In this way, even if the valve opening difference is less than the preset second reference value, determining whether the exhaust sensor is detached can be based on the relationship between the corrected exhaust temperature difference, the coil temperature difference, and the second reference temperature.

[0073] In some embodiments, the second reference value is -20°C. The second reference temperature is 2°C. When the valve opening difference is less than -20°C, if the exhaust temperature correction difference is less than 2°C and the coil temperature difference is greater than 2°C, it is determined that the exhaust gas sensor is disconnected. If the exhaust temperature correction difference is greater than or equal to 2°C or the coil temperature difference is less than or equal to 2°C, it is determined that the exhaust gas sensor is not disconnected.

[0074] Combine Figure 3 As shown, an embodiment of the present disclosure provides a method for detecting exhaust gas sensor detachment, comprising:

[0075] In step S301, when the air conditioner is in operation, the operating frequency of the compressor is obtained.

[0076] Step S302 : When the compressor operating frequency of the air conditioner is greater than or equal to a preset target operating frequency, the air conditioner obtains operating parameters of the air conditioner at intervals of a first preset time.

[0077] In step S303, the air conditioner determines current operating parameters and historical operating parameters based on real-time operating parameters. The air conditioner includes a compressor, an indoor fan, an outdoor fan, a condensing coil, and an electronic expansion valve. The current operating parameters include: a first target temperature, a first ambient temperature, a first operating frequency of the compressor, a first indoor fan speed of the indoor fan, a first outdoor fan speed of the outdoor fan, a first coil temperature of the condensing coil, a first valve opening of the electronic expansion valve, and a first exhaust temperature collected by the exhaust gas sensor. The historical operating parameters include: a second target temperature, a second ambient temperature, a second operating frequency of the compressor, a second indoor fan speed of the indoor fan, a second outdoor fan speed of the outdoor fan, a second coil temperature of the condensing coil, a second valve opening of the electronic expansion valve, and a second exhaust temperature collected by the exhaust gas sensor.

[0078] In step S304, the air conditioner obtains the absolute value of the frequency difference between the first operating frequency and the second operating frequency when the first target temperature is equal to the second target temperature, the first inner fan speed is equal to the second inner fan speed, and the first outer fan speed is equal to the second outer fan speed.

[0079] In step S305 , the air conditioner obtains an exhaust temperature difference between the first exhaust temperature and the second exhaust temperature when the absolute value of the frequency difference is less than a preset set frequency.

[0080] In step S306 , the air conditioner obtains an ambient temperature difference between the first ambient temperature and the second ambient temperature.

[0081] In step S307, the air conditioner obtains an exhaust temperature correction difference according to the exhaust temperature difference and the ambient temperature difference.

[0082] In step S308 , the air conditioner obtains a coil temperature difference between the first coil temperature and the second coil temperature.

[0083] In step S309, the air conditioner obtains an exhaust temperature correction difference according to the exhaust temperature difference and the ambient temperature difference.

[0084] In step S310, when the valve opening difference is greater than a preset first reference value, if the exhaust temperature correction difference is greater than the preset first reference temperature and the coil temperature difference is less than the preset first reference temperature, the exhaust gas sensor is determined to be detached.

[0085] In step S311, when the valve opening difference of the air conditioner is greater than the preset first reference value, if the exhaust temperature correction difference is less than or equal to the preset first reference temperature or the coil temperature difference is greater than or equal to the preset first reference temperature, it is determined that the exhaust sensor is not detached.

[0086] According to the method for detecting exhaust gas sensor loss provided by the embodiments of the present disclosure, when the air conditioner is in operation, the air conditioner obtains the compressor operating frequency of the compressor. When the compressor operating frequency is greater than or equal to a preset target operating frequency, the air conditioner operating parameters are obtained at first preset intervals. Based on the real-time operating parameters, current operating parameters including a first target temperature, a first ambient temperature, a first operating frequency of the compressor, a first internal fan speed of the internal fan, a first external fan speed of the external fan, a first coil temperature of the condensing coil, a first valve opening of the electronic expansion valve, and a first exhaust gas temperature and a second target temperature are obtained. Historical operating parameters including a second ambient temperature, a second operating frequency of the compressor, a second internal fan speed of the internal fan, a second external fan speed of the external fan, a second coil temperature of the condensing coil, a second valve opening of the electronic expansion valve, and a second exhaust gas temperature obtained by the exhaust gas sensor are obtained. The accuracy of the obtained first coil temperature, second coil temperature, first exhaust gas temperature, and second exhaust gas temperature is then ensured by determining the equality of the first target temperature and the second target temperature, the first internal fan speed, the second internal fan speed, the first external fan speed, the second external fan speed, the first operating frequency, and the second operating frequency. Then, a correction difference in exhaust temperature is calculated based on the first exhaust temperature, the second exhaust temperature, the first ambient temperature, and the second ambient temperature, reducing the impact of ambient temperature variations on exhaust temperature variations. If the valve opening difference is less than a preset second reference value, the exhaust sensor is determined to be disconnected based on the relationship between the correction difference in exhaust temperature and the coil temperature difference and the second reference temperature. This enables detection of exhaust sensor disconnection, thereby improving the accuracy of exhaust sensor disconnection detection.

[0087] Combine Figure 4 As shown, an embodiment of the present disclosure provides a method for detecting exhaust gas sensor detachment, comprising:

[0088] In step S401, the air conditioner obtains real-time operating parameters of the air conditioner every first preset time period, and then executes step S402.

[0089] In step S402, the air conditioner determines current operating parameters and historical operating parameters based on real-time operating parameters. The air conditioner includes a compressor, an indoor fan, an outdoor fan, a condensing coil, and an electronic expansion valve. The current operating parameters include: a first target temperature, a first ambient temperature, a first operating frequency of the compressor, a first indoor fan speed of the indoor fan, a first outdoor fan speed of the outdoor fan, a first coil temperature of the condensing coil, a first valve opening of the electronic expansion valve, and a first exhaust temperature collected by the exhaust gas sensor. Historical operating parameters include: a second target temperature, a second ambient temperature, a second operating frequency of the compressor, a second indoor fan speed of the indoor fan, a second outdoor fan speed of the outdoor fan, a second coil temperature of the condensing coil, a second valve opening of the electronic expansion valve, and a second exhaust temperature collected by the exhaust gas sensor. Step S403 is then executed.

[0090] In step S403, the air conditioner determines whether the current operating parameters and historical operating parameters meet a first preset condition. The first preset condition is that the first target temperature is equal to the second target temperature, the first inner fan speed is equal to the second inner fan speed, and the first outer fan speed is equal to the second outer fan speed. If so, the process proceeds to step S404. If not, the process returns to step S401.

[0091] In step S404, the air conditioner obtains the absolute value of the frequency difference between the first operating frequency and the second operating frequency, and then executes step S405.

[0092] In step S405, the air conditioner determines whether the absolute value of the frequency difference is less than a preset frequency. If so, the process proceeds to step S406. If not, the process returns to step S401.

[0093] In step S406, the air conditioner obtains an exhaust temperature correction difference according to the first exhaust temperature, the second exhaust temperature, the first ambient temperature, and the second ambient temperature, and then executes step S407.

[0094] In step S407, the air conditioner obtains the coil temperature difference between the first coil temperature and the second coil temperature, and then executes step S408.

[0095] In step S408, the air conditioner obtains a valve opening difference between the first valve opening and the second valve opening, and then executes step S409.

[0096] In step S409, the air conditioner determines whether the valve opening difference is greater than a preset first reference value. If so, the process proceeds to step S410. If not, the process proceeds to step S411.

[0097] In step S410, the air conditioner determines whether the corrected exhaust temperature difference and the coil temperature difference meet a second preset condition. The second preset condition is that the corrected exhaust temperature difference is greater than a preset first reference temperature and the coil temperature difference is less than a preset first reference temperature. If so, the air conditioner proceeds to step S413. If not, the air conditioner proceeds to step S414.

[0098] In step S411, the air conditioner determines whether the valve opening difference is less than a preset second reference value. If so, step S412 is executed. If not, step S414 is executed. The first reference value is greater than the second reference value.

[0099] In step S412, the air conditioner determines whether the corrected exhaust temperature difference and the coil temperature difference meet a third preset condition. The third preset condition is that the corrected exhaust temperature difference is less than a preset second reference temperature and the coil temperature difference is greater than the preset second reference temperature. If so, the air conditioner proceeds to step S413. If not, the air conditioner proceeds to step S414.

[0100] In step S413, the air conditioner determines that the exhaust gas sensor is detached.

[0101] In step S414, the air conditioner determines that the exhaust gas sensor is not detached.

[0102] According to the method for detecting exhaust gas sensor loss provided by the embodiments of the present disclosure, when the air conditioner is in operation, the air conditioner obtains the compressor operating frequency of the compressor. When the compressor operating frequency is greater than or equal to a preset target operating frequency, the air conditioner operating parameters are obtained at first preset intervals. Based on the real-time operating parameters, current operating parameters including a first target temperature, a first ambient temperature, a first operating frequency of the compressor, a first internal fan speed of the internal fan, a first external fan speed of the external fan, a first coil temperature of the condensing coil, a first valve opening of the electronic expansion valve, and a first exhaust gas temperature and a second target temperature are obtained. Historical operating parameters including a second ambient temperature, a second operating frequency of the compressor, a second internal fan speed of the internal fan, a second external fan speed of the external fan, a second coil temperature of the condensing coil, a second valve opening of the electronic expansion valve, and a second exhaust gas temperature obtained by the exhaust gas sensor are obtained. The accuracy of the obtained first coil temperature, second coil temperature, first exhaust gas temperature, and second exhaust gas temperature is then ensured by determining the equality of the first target temperature and the second target temperature, the first internal fan speed, the second internal fan speed, the first external fan speed, the second external fan speed, the first operating frequency, and the second operating frequency. Then, a correction difference in exhaust temperature is obtained based on the first exhaust temperature, the second exhaust temperature, the first ambient temperature, and the second ambient temperature, reducing the impact of ambient temperature changes on exhaust temperature changes. The exhaust sensor is then determined to be disconnected based on the relationship between the valve opening difference and the first and second reference values, and based on the relationship between the correction difference in exhaust temperature and the coil temperature difference and the second reference temperature. This enables detection of exhaust sensor disconnection, thereby improving the accuracy of exhaust sensor disconnection detection.

[0103] Combine Figure 5 As shown, an embodiment of the present disclosure provides a device 1 for detecting exhaust sensor detachment, comprising a processor 2 and a memory 3. Optionally, the device may further comprise a communication interface 4 and a bus 5. The processor 2, the communication interface 4, and the memory 3 may communicate with each other via the bus 5. The communication interface 4 may be used for information transmission. The processor 2 may invoke logic instructions in the memory 3 to execute the method for detecting exhaust sensor detachment of the above embodiment.

[0104] In addition, the logic instructions in the memory 3 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0105] Memory 3, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as the program instructions / modules corresponding to the methods in the embodiments of the present disclosure. Processor 2 executes the program instructions / modules stored in memory 3 to perform functional applications and data processing, thereby implementing the method for detecting exhaust gas sensor detachment in the above-described embodiments.

[0106] The memory 3 may include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function; the data storage area may store data generated based on the use of the terminal device. Furthermore, the memory 3 may include high-speed random access memory and non-volatile memory.

[0107] The device for detecting exhaust gas sensor detachment provided by the embodiment of the present disclosure is used to obtain the real-time operating parameters of the air conditioner at intervals of a first preset time. It is then determined whether the exhaust gas sensor has detached based on the current operating parameters obtained at the current moment and the historical operating parameters obtained at previous moments. Thus, compared to directly detecting whether the exhaust gas sensor has detached based on the current operating parameters at the current moment, this solution determines whether the exhaust gas sensor has detached based on the current operating parameters at the current moment and the historical operating parameters at previous moments. Whether the exhaust gas sensor has detached can be checked based on the changes between the current moment and the current operating parameters and the historical operating parameters at previous moments, thereby improving the accuracy of detecting whether the exhaust gas sensor has detached.

[0108] Combine Figure 6 As shown, an embodiment of the present disclosure provides an air conditioner 6, comprising: an air conditioner body, and the above-mentioned device 1 for detecting the detachment of the exhaust gas sensor. The device 1 for detecting the detachment of the exhaust gas sensor is installed on the air conditioner body. The installation relationship described here is not limited to placement inside the air conditioner, but also includes installation connections with other components of the air conditioner, including but not limited to physical connections, electrical connections or signal transmission connections. It can be understood by those skilled in the art that the device 1 for detecting the detachment of the exhaust gas sensor can be adapted to a feasible air conditioner body, thereby realizing other feasible embodiments.

[0109] The air conditioner provided by the embodiment of the present disclosure is used to obtain the real-time operating parameters of the air conditioner at intervals of a first preset time. Then, it is determined whether the exhaust sensor has fallen off based on the current operating parameters obtained at the current moment and the historical operating parameters obtained at the historical moments. In this way, compared to directly detecting whether the exhaust sensor has fallen off based on the operating parameters at the current moment, this solution determines whether the exhaust sensor has fallen off based on the current operating parameters at the current moment and the historical operating parameters at the historical moments. It is possible to check whether the exhaust sensor has fallen off based on the changes between the current moment and the current operating parameters and the historical operating parameters at the historical moments, thereby improving the accuracy of detecting whether the exhaust sensor has fallen off.

[0110] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for detecting detachment of an exhaust gas sensor.

[0111] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0112] The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program code, or a transient storage medium.

[0113] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include plural forms. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups of these. In the absence of further restrictions, an element defined by the sentence "comprising a..." does not exclude the presence of other identical elements in the process, method or device that includes the element. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments can be referenced to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can be found in the description of the method part.

[0114] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. The technicians will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0115] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical functional division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, and can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. In addition, the functional units in the embodiments of the present disclosure may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0116] The flowcharts and block diagrams in the accompanying drawings show the possible implementation architectures, functions and operations of the systems, methods and computer program products according to the embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of the code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical functions. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified function or action, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for detecting exhaust gas sensor detachment, characterized in that: Applied to an air conditioner, the method comprises: obtaining real-time operating parameters of the air conditioner at intervals of a first preset time; Determine the current operating parameters and the historical operating parameters based on the real-time operating parameters; wherein the current operating parameters are the real-time operating parameters obtained at the current moment; and the historical operating parameters are the real-time operating parameters obtained at a preset historical moment; Determine whether the exhaust gas sensor is detached based on current operating parameters and historical operating parameters; The air conditioner includes a compressor, an indoor fan, an outdoor fan, a condensing side coil and an electronic expansion valve; the current operating parameters include: a first target temperature, a first ambient temperature, a first operating frequency of the compressor, a first indoor fan speed of the indoor fan, a first outdoor fan speed of the outdoor fan, a first coil temperature of the condensing side coil, a first valve opening of the electronic expansion valve and a first exhaust temperature collected by the exhaust gas sensor; the historical operating parameters include: a second target temperature, a second ambient temperature, a second operating frequency of the compressor, a second indoor fan speed of the indoor fan, a second outdoor fan speed of the outdoor fan, a second coil temperature of the condensing side coil, a second valve opening of the electronic expansion valve and a first exhaust temperature collected by the exhaust gas sensor. a second exhaust temperature collected by a sensor; determining whether the exhaust sensor is detached based on current operating parameters and historical operating parameters, including: obtaining an absolute value of a frequency difference between a first operating frequency and a second operating frequency when the first target temperature is equal to the second target temperature, the first inner fan speed is equal to the second inner fan speed, and the first outer fan speed is equal to the second outer fan speed; and determining whether the exhaust sensor is detached based on the first coil temperature, the first valve opening, the first exhaust temperature, the first ambient temperature, the second coil temperature, the second valve opening, the second exhaust temperature, and the second ambient temperature when the absolute value of the frequency difference is less than a preset set frequency.

2. The method according to claim 1, characterized in that The air conditioner includes a compressor; and obtaining operating parameters of the air conditioner every first preset time period includes: When the air conditioner is in an operating state, obtaining a compressor operating frequency of the compressor; When the operating frequency of the compressor is greater than or equal to a preset target operating frequency, the operating parameters of the air conditioner are obtained every first preset time period.

3. The method according to claim 1, characterized in that Determining whether the exhaust gas sensor is detached based on the first coil temperature, the first valve opening, the first exhaust gas temperature, the first ambient temperature, the second coil temperature, the second valve opening, the second exhaust gas temperature, and the second ambient temperature includes: Obtaining an exhaust temperature correction difference based on the first exhaust temperature, the second exhaust temperature, the first ambient temperature, and the second ambient temperature; Obtaining a coil temperature difference between a first coil temperature and a second coil temperature; obtaining a valve opening difference between a first valve opening and a second valve opening; Determine whether the exhaust gas sensor is detached based on the exhaust gas temperature correction difference, coil temperature difference and valve opening difference.

4. The method according to claim 3, characterized in that Obtaining an exhaust temperature correction difference according to the first exhaust temperature, the second exhaust temperature, the first ambient temperature, and the second ambient temperature, including: obtaining an exhaust gas temperature difference between a first exhaust gas temperature and a second exhaust gas temperature; obtaining an ambient temperature difference between a first ambient temperature and a second ambient temperature; An exhaust temperature correction difference is obtained according to the exhaust temperature difference and the ambient temperature difference.

5. The method according to claim 3, characterized in that Determine whether the exhaust gas sensor is off based on the exhaust gas temperature correction difference, coil temperature difference and valve opening difference, including: In the case where the valve opening difference is greater than a preset first reference value, if the exhaust temperature correction difference is greater than the preset first reference temperature and the coil temperature difference is less than the preset first reference temperature, it is determined that the exhaust gas sensor is detached; and / or, When the valve opening difference is greater than the preset first reference value, if the exhaust temperature correction difference is less than or equal to the preset first reference temperature or the coil temperature difference is greater than or equal to the preset first reference temperature, it is determined that the exhaust gas sensor is not detached.

6. The method according to claim 3, characterized in that Determine whether the exhaust gas sensor is off based on the exhaust gas temperature correction difference, coil temperature difference and valve opening difference, including: In the case where the valve opening difference is less than a preset second reference value, if the exhaust temperature correction difference is less than the preset second reference temperature and the coil temperature difference is greater than the preset second reference temperature, it is determined that the exhaust gas sensor is detached; and / or, When the valve opening difference is less than the preset second reference value, if the exhaust temperature correction difference is greater than or equal to the preset second reference temperature or the coil temperature difference is less than or equal to the preset second reference temperature, it is determined that the exhaust gas sensor is not detached.

7. A device for detecting the detachment of an exhaust gas sensor, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for detecting exhaust gas sensor detachment according to any one of claims 1 to 6 when running the program instructions.

8. An air conditioner, characterized in that: include: Air conditioner body; The device for detecting the detachment of the exhaust gas sensor according to claim 7 is installed on the air conditioner body.

9. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the method for detecting exhaust gas sensor detachment according to any one of claims 1 to 6 is executed.

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