CN114151924B

CN114151924B - Fault determination method and device for air conditioner temperature sensing bulb, air conditioner and storage medium

Info

Publication number: CN114151924B
Application number: CN202111488410.1A
Authority: CN
Inventors: 缪玉珍; 郭玉华
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-12-02
Anticipated expiration: 2041-12-07
Also published as: CN114151924A

Abstract

The invention discloses a fault determination method and device for an air conditioner temperature sensing bulb, an air conditioner and a storage medium, wherein the method comprises the following steps: determining the current refrigerant type of the air conditioner; determining the lowest effective temperature of a temperature sensing bulb of a current refrigerant pipeline; acquiring the current temperature of a current refrigerant pipeline temperature sensing bulb; under the condition that a pressure sensor is arranged on the air suction side of a compressor of the air conditioner, the current refrigerant type and the pressure sensor are combined, and whether the current refrigerant pipeline temperature sensing bulb breaks down or not is determined according to the current temperature and the lowest effective temperature. According to the scheme, when the actual temperature of the environment where the temperature sensing bulb of the air conditioner is located exceeds the temperature detection range of the temperature sensing bulb, the fault detection function of the temperature sensing bulb of the air conditioner is shielded, and the temperature sensing bulb of the air conditioner is prevented from being mistakenly reported to be faulty due to the fact that the actual temperature of the environment exceeds the temperature detection range of the temperature sensing bulb.

Description

Fault determination method and device for air conditioner temperature sensing bulb, air conditioner and storage medium

Technical Field

The invention belongs to the technical field of air conditioners, and particularly relates to a fault determination method and device for a temperature sensing bulb of an air conditioner, the air conditioner and a storage medium, in particular to a fault determination method and device for the temperature sensing bulb, the air conditioner and the storage medium.

Background

The temperature sensing bulb is made of thermistor as raw material through the processes of adding lead wire sleeve and pressing terminal. The thermistor is characterized by being sensitive to temperature and showing different resistance values at different temperatures. The application of the temperature sensing bulb in the air conditioning field is quite wide, but is limited by material cost, and the temperature sensing bulb used on the air conditioner in the related scheme is as follows: the applicable rated temperature ranges of the 15K temperature sensing bulb and the 20K temperature sensing bulb are-20 ℃ to 127 ℃, and the applicable rated temperature range of the 10K temperature sensing bulb is-20 ℃ to 150 ℃.

The thermal bulb material of selecting for use in the relevant scheme can satisfy most service environment, therefore few producers can select the higher temperature bulb of cost that the more excellent material will satisfy non-mainstream and the order demand that the volume is few. However, if the temperature sensing bulb is suitable for lower or higher temperature conditions, the temperature sensing bulb made of a material with lower temperature resistance or higher temperature resistance needs to be selected, and the cost of the air conditioner production raw material is increased.

A machine room air conditioner used in a data center belongs to a special precision air conditioner and needs to continuously operate for 24 hours all the year round. When the outdoor environment temperature of the data center is extremely low and the indoor temperature is high (such as the indoor temperature exceeds the temperature range required by the data center), the air conditioning unit in the machine room needs to be started for refrigeration to balance the indoor heat load, when the compressor is just started, the refrigerant in the fluorine system is not completely circulated, and is influenced by factors such as the throttling of the electronic expansion valve (the throttling of the electronic expansion valve aims to prevent the compressor from running with liquid), the pipe temperature is lower due to the fact that the pipe inlet side of the compressor is in a state similar to vacuumizing, meanwhile, the refrigerant with the extremely low outdoor temperature is pumped in by the pipe inlet side of the compressor, the phenomenon that the actual value of the current pipe temperature exceeds the temperature detection range of the temperature sensing bulb is easily caused, and the temperature sensing bulb is mistakenly reported to fail to further cause the normal starting of the air conditioning unit. However, it should be noted that, as long as the compressor of the machine room air conditioner is normally started to operate for a period of time, the temperature of the refrigerant working medium in the fluorine system is sufficiently and effectively circulated, the temperature of the inlet pipe side of the compressor is raised to a certain extent, and the temperature of the inlet pipe side of the compressor is not beyond the temperature detection range of the thermal bulb under normal conditions.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention aims to provide a fault determining method and device for a temperature sensing bulb of an air conditioner, the air conditioner and a storage medium, which are used for solving the problem that when the temperature of outdoor environment is extremely low and a compressor of the air conditioner is just started, the temperature sensing bulb of the air conditioner can falsely report the fault of the temperature sensing bulb due to the fact that the temperature sensing bulb exceeds the temperature detection range of the temperature sensing bulb, and the effect that when the actual temperature of the environment where the temperature sensing bulb of the air conditioner is located is determined to exceed the temperature detection range of the temperature sensing bulb, the fault detecting function of the temperature sensing bulb of the air conditioner is shielded, and the fault of the temperature sensing bulb of the air conditioner can be falsely reported due to the fact that the temperature sensing bulb exceeds the temperature detection range of the temperature sensing bulb is avoided.

The invention provides a fault determination method of an air-conditioning temperature sensing bulb, which comprises the following steps: the temperature sensing bulb is arranged at a refrigerant pipeline of the air conditioner and is marked as a refrigerant pipeline temperature sensing bulb; the number of the refrigerant pipelines is more than one, and the number of the refrigerant pipeline temperature sensing packages is at least as large as that of the refrigerant pipelines; recording one refrigerant pipeline temperature sensing package to be detected in more than one refrigerant pipeline temperature sensing package as a current refrigerant pipeline temperature sensing package; the method for determining the fault of the air conditioner temperature sensing bulb comprises the following steps: performing fault determination on the current refrigerant pipeline temperature sensing bulb within a first set time after the compressor of the air conditioner is started or under the condition that the whole machine of the air conditioner is in a standby state and the compressor of the air conditioner is not started; wherein, to current refrigerant pipeline temperature sensing package carries out the fault and confirms, include: determining the type of a refrigerant used by the air conditioner, and recording the type as the current refrigerant type; determining the minimum effective value of the temperature detection value of the current refrigerant pipeline temperature sensing bulb, and recording the minimum effective value as the minimum effective temperature; acquiring a current temperature detection value of the current refrigerant pipeline temperature sensing bulb, and recording the current temperature detection value as a current temperature; and under the condition that a pressure sensor is arranged on the air suction side of a compressor of the air conditioner, determining whether the current refrigerant pipeline temperature sensing bulb is in fault or not according to the current temperature and the lowest effective temperature by combining the current refrigerant type and the pressure sensor.

In some embodiments, determining whether the current refrigerant line bulb is faulty according to the current temperature and the lowest effective temperature includes: determining whether the current temperature is less than the minimum effective temperature; if the current temperature is lower than the minimum effective temperature, determining that the current refrigerant pipeline temperature sensing bulb has a fault; and if the current temperature is greater than or equal to the minimum effective temperature, determining that the current refrigerant pipeline temperature sensing bulb is not in fault, namely determining that the current refrigerant pipeline temperature sensing bulb is normal.

In some embodiments, in a case that a pressure sensor is disposed on a suction side of a compressor of the air conditioner, determining whether the current refrigerant pipeline temperature sensing bulb has a fault according to the current temperature and the lowest effective temperature by combining the current refrigerant type and the pressure sensor, includes: acquiring a current pressure detection value of the pressure sensor, and recording the current pressure detection value as current pressure; determining a theoretical temperature corresponding to the current pressure according to the current refrigerant type; and under the condition that the theoretical temperature corresponding to the current pressure is determined, determining whether the current refrigerant pipeline temperature sensing bulb has a fault according to the current temperature and the lowest effective temperature.

In some embodiments, determining whether the current refrigerant line bulb is faulty based on the current temperature and the lowest effective temperature, in the case that the theoretical temperature corresponding to the current pressure is determined, includes: determining whether the current temperature is less than the lowest effective temperature if a theoretical temperature corresponding to the current pressure has been determined; if the current temperature is lower than the minimum effective temperature, determining whether the current refrigerant pipeline temperature sensing bulb is in fault or not according to the theoretical temperature and the minimum effective temperature; and if the current temperature is greater than or equal to the minimum effective temperature, determining that the current refrigerant pipeline temperature sensing bulb is not in fault, namely determining that the current refrigerant pipeline temperature sensing bulb is normal.

In some embodiments, determining whether the current refrigerant line bulb is faulty according to the theoretical temperature and the minimum effective temperature includes: determining whether the theoretical temperature is less than the minimum effective temperature; if the theoretical temperature is lower than the minimum effective temperature, determining that the current temperature of the current refrigerant pipeline temperature sensing bulb exceeds the temperature detection range of the current refrigerant pipeline temperature sensing bulb, and shielding the fault detection function of the current refrigerant pipeline temperature sensing bulb; and if the theoretical temperature is greater than or equal to the minimum effective temperature, determining that the current refrigerant pipeline temperature sensing bulb has a fault.

In accordance with the above method, in another aspect of the present invention, there is provided a fault determination apparatus for an air-conditioning bulb, including: the temperature sensing bulb is arranged at a refrigerant pipeline of the air conditioner and is marked as a refrigerant pipeline temperature sensing bulb; the number of the refrigerant pipelines is more than one, and the number of the refrigerant pipeline temperature sensing packages is at least as large as that of the refrigerant pipelines; recording one refrigerant pipeline temperature sensing package to be detected in more than one refrigerant pipeline temperature sensing package as a current refrigerant pipeline temperature sensing package; the fault determination device of the air conditioner temperature sensing bulb comprises: the control unit is configured to perform fault determination on the current refrigerant pipeline temperature sensing bulb within a first set time after the compressor of the air conditioner is started or under the condition that the whole machine of the air conditioner is in a standby state and the compressor of the air conditioner is not started; wherein, the control unit carries out the trouble to current refrigerant pipeline temperature sensing bulb and confirms, includes: the control module is configured to determine the type of a refrigerant used by the air conditioner and record the type as the current refrigerant type; the control module is also configured to determine the lowest effective value of the temperature detection value of the current refrigerant pipeline temperature sensing bulb and record the lowest effective value as the lowest effective temperature; the acquisition module is configured to acquire a current temperature detection value of the current refrigerant pipeline temperature sensing bulb and record the current temperature detection value as a current temperature; the control module is further configured to determine whether the current refrigerant pipeline temperature sensing bulb is in fault or not according to the current temperature and the lowest effective temperature by combining the current refrigerant type and the pressure sensor under the condition that the pressure sensor is arranged on the air suction side of the compressor of the air conditioner.

In some embodiments, the determining, by the control module, whether the current refrigerant pipeline temperature sensing bulb is faulty according to the current temperature and the lowest effective temperature includes: determining whether the current temperature is less than the minimum effective temperature; if the current temperature is lower than the lowest effective temperature, determining that the current refrigerant pipeline temperature sensing bulb has a fault; and if the current temperature is greater than or equal to the minimum effective temperature, determining that the current refrigerant pipeline temperature sensing bulb is not in fault, namely determining that the current refrigerant pipeline temperature sensing bulb is normal.

In some embodiments, the determining, by the control module, whether the current refrigerant pipeline temperature sensing bulb has a fault according to the current temperature and the lowest effective temperature by combining the current refrigerant type and the pressure sensor when a pressure sensor is disposed on a suction side of a compressor of the air conditioner includes: acquiring a current pressure detection value of the pressure sensor, and recording the current pressure detection value as current pressure; determining a theoretical temperature corresponding to the current pressure according to the current refrigerant type; and under the condition that the theoretical temperature corresponding to the current pressure is determined, determining whether the current refrigerant pipeline temperature sensing bulb has a fault according to the current temperature and the lowest effective temperature.

In some embodiments, the determining, by the control module, whether the current refrigerant line bulb is faulty according to the current temperature and the lowest effective temperature when the theoretical temperature corresponding to the current pressure is determined includes: determining whether the current temperature is less than the lowest effective temperature, in a case where a theoretical temperature corresponding to the current pressure has been determined; if the current temperature is lower than the minimum effective temperature, determining whether the current refrigerant pipeline temperature sensing bulb is in fault or not according to the theoretical temperature and the minimum effective temperature; and if the current temperature is greater than or equal to the minimum effective temperature, determining that the current refrigerant pipeline temperature sensing bulb is not in fault, namely determining that the current refrigerant pipeline temperature sensing bulb is normal.

In some embodiments, the determining, by the control module, whether the current refrigerant pipeline temperature sensing bulb is faulty according to the theoretical temperature and the minimum effective temperature includes: determining whether the theoretical temperature is less than the minimum effective temperature; if the theoretical temperature is lower than the minimum effective temperature, determining that the current temperature of the current refrigerant pipeline temperature sensing bulb exceeds the temperature detection range of the current refrigerant pipeline temperature sensing bulb, and shielding the fault detection function of the current refrigerant pipeline temperature sensing bulb; and if the theoretical temperature is greater than or equal to the minimum effective temperature, determining that the current refrigerant pipeline temperature sensing bulb has a fault.

In accordance with another aspect of the present invention, there is provided an air conditioner including: the fault determination device of the air conditioner temperature sensing bulb is described above.

In line with the method, the present invention provides a storage medium, where the storage medium includes a stored program, and when the program runs, a device where the storage medium is located is controlled to execute the method for determining a fault of an air conditioner temperature sensing bulb.

Therefore, according to the scheme of the invention, the lowest effective temperature (such as the lowest effective value Tmin of the temperature detection of the pipeline temperature sensing bulb) of the refrigerant pipeline temperature sensing bulb of the air conditioner is determined, the current temperature of the refrigerant pipeline temperature sensing bulb is collected, and whether the temperature sensing bulb is in fault or not is determined according to the current temperature and the lowest effective temperature of the refrigerant pipeline temperature sensing bulb; the method comprises the steps that under the condition that a pressure sensor is arranged on the air suction side of a compressor of the air conditioner and the pressure sensor is not in fault, the current pressure of the pressure sensor is collected, a theoretical temperature value corresponding to the current pressure is determined according to the thermal property of a refrigerant in a saturated state of the refrigerant used by the air conditioner, and when the current temperature of a refrigerant pipeline temperature sensing bulb of the air conditioner is determined to be beyond the temperature detection range of the refrigerant pipeline temperature sensing bulb per se according to the current temperature and the lowest effective temperature of the refrigerant pipeline temperature sensing bulb and the theoretical temperature value corresponding to the current pressure of the pressure sensor, the fault detection function of the temperature sensing bulb of the air conditioner is shielded when the current temperature of the refrigerant pipeline temperature sensing bulb of the air conditioner is beyond the temperature detection range of the refrigerant pipeline temperature sensing bulb per se; therefore, when the actual temperature of the environment where the temperature sensing bulb of the air conditioner is located exceeds the temperature detection range of the temperature sensing bulb, the fault detection function of the temperature sensing bulb of the air conditioner is shielded, and the temperature sensing bulb of the air conditioner is prevented from misrepresenting the fault of the temperature sensing bulb due to the fact that the temperature sensing bulb of the air conditioner exceeds the temperature detection range of the temperature sensing bulb.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic flow chart illustrating an embodiment of a method for determining a fault of a thermal bulb of an air conditioner according to the present invention;

fig. 2 is a schematic flow chart illustrating an embodiment of determining whether the current refrigerant pipeline thermal bulb fails according to the current temperature and the minimum effective temperature in the method of the present invention;

fig. 3 is a schematic flow chart illustrating an embodiment of determining whether the current refrigerant pipeline thermal bulb has a fault according to the current temperature and the lowest effective temperature by combining the current refrigerant type and the pressure sensor in the method of the present invention;

fig. 4 is a schematic flowchart illustrating an embodiment of determining whether the current refrigerant pipeline bulb fails according to the current temperature and the lowest effective temperature when the theoretical temperature corresponding to the current pressure is determined in the method of the present invention;

fig. 5 is a schematic flow chart illustrating an embodiment of determining whether the current refrigerant pipeline thermal bulb fails according to the theoretical temperature and the minimum effective temperature in the method of the present invention;

FIG. 6 is a schematic structural diagram of an embodiment of a fault determination device for a thermal bulb of an air conditioner according to the present invention;

FIG. 7 is a schematic diagram of the overall structure of an embodiment of an air conditioner;

fig. 8 is a flowchart illustrating an embodiment of a bulb fault determination method of an air conditioner.

The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:

1-an electric heater; 2-electrode humidifier; 3-EC fan; 4-an electronic expansion valve; 5-capillary (i.e., parallel capillary); 6-high voltage switch; 71-a low pressure sensor; 72-high pressure sensor; 81-exhaust temperature sensing bulb; 82-evaporator outlet pipe temperature sensing bulb; 83-evaporator inlet pipe temperature sensing bulb; 102-an obtaining module; 104-control module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

According to the scheme, when a certain temperature sensing bulb breaks down, whether other temperature sensing bulbs of the same type break down or not is detected, if a plurality of temperature sensing bulbs break down simultaneously, the false alarm fault caused by the fact that the temperature sensing bulb detection temperature exceeds the range is judged, and the temperature sensing bulb fault is shielded. One of the disadvantages of the scheme is that the fault of the temperature sensing bulb is required to be judged when the unit is not started, and whether the fault of the temperature sensing bulb is a false alarm or not cannot be judged after the unit is started; the second disadvantage of the solution is that a plurality of temperature sensing bulbs of the same type are required to exist and perform fault judgment at the same time, and a plurality of temperature sensing bulbs of the same type are not necessarily required under actual use conditions.

And the other scheme provides a temperature sensing bulb fault detection method, a spare temperature sensing bulb is required to be adopted, when a temperature sensing bulb fault signal is generated, the temperature sensing bulb is switched to be the spare temperature sensing bulb, if the spare temperature sensing bulb does not generate the fault signal, the current temperature sensing bulb fault is judged, and the situation that the fault is not caused by the damage of a controller detection circuit is further explained. One of the disadvantages of the scheme is that a temperature sensing bulb interface needs to be backed up on the controller, and a temperature sensing bulb needs to be backed up on the air conditioning unit at the same time, so that the design cost is increased; the second disadvantage of this design is that the false alarm failure of the thermal bulb in the ultra-low temperature environment cannot be avoided, and when the current ambient temperature exceeds the detection range of the thermal bulb, the replacement of the spare thermal bulb is not good for.

In other schemes, a fault detection method for the exhaust temperature sensing bulb is provided, and whether the temperature sensing bulb has a fault or not is judged according to the empirical effect of system control theoretically through automatic matching action of all loads in a unit self-detection mode. One disadvantage of this solution is that it is complex to operate and involves a certain risk of uncontrollable. The second disadvantage of this solution is that it requires other environmental temperature sensing bulb for detection and is not suitable for use in ultra-low temperature environment.

According to an embodiment of the present invention, a method for determining a fault of a thermal bulb of an air conditioner is provided, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method of the present invention. The air conditioner temperature sensing bulb comprises: and the temperature sensing bulb is arranged at the refrigerant pipeline of the air conditioner and is marked as a refrigerant pipeline temperature sensing bulb. The number of the refrigerant pipelines is more than one, the number of the refrigerant pipeline temperature sensing bags is at least as large as that of the refrigerant pipelines, and actually, the number of the refrigerant pipeline temperature sensing bags can be larger than or equal to that of the refrigerant pipelines. And recording one refrigerant pipeline temperature sensing package to be detected in more than one refrigerant pipeline temperature sensing package as the current refrigerant pipeline temperature sensing package. The method for determining the fault of the air conditioner temperature sensing bulb comprises the following steps: and in a first set time after the compressor of the air conditioner is started, or under the condition that the whole machine of the air conditioner is in a standby state and the compressor of the air conditioner is not started, fault determination is carried out on the current refrigerant pipeline temperature sensing bulb. Wherein, to current refrigerant pipeline temperature sensing package carries out the fault and confirms, include: step S110 to step S150.

In step S110, the type of the refrigerant used by the air conditioner is determined and recorded as the current refrigerant type.

In step S120, the minimum effective value of the temperature detection value of the current refrigerant pipeline thermal bulb is determined and recorded as the minimum effective temperature.

In step S130, a current temperature detection value of the current refrigerant pipeline thermal bulb is obtained and recorded as a current temperature.

In some embodiments, with reference to a schematic flow chart of an embodiment of determining whether the current refrigerant pipeline temperature sensing bulb is faulty according to the current temperature and the lowest effective temperature in the method of the present invention shown in fig. 2, a specific process of determining whether the current refrigerant pipeline temperature sensing bulb is faulty according to the current temperature and the lowest effective temperature in step S140 is further described, which includes: step S210 to step S230.

Step S210, determining whether the current temperature is less than the lowest effective temperature.

Step S220, if the current temperature is lower than the minimum effective temperature, determining that the current refrigerant pipeline bulb fails.

Step S230, if the current temperature is greater than or equal to the lowest effective temperature, determining that the current refrigerant pipeline bulb is not in fault, that is, determining that the current refrigerant pipeline bulb is normal.

Fig. 8 is a flowchart illustrating an embodiment of a method for determining a failure of a bulb of an air conditioner. As shown in fig. 8, the method for determining a failure of a bulb of an air conditioner includes:

step 1, the whole air conditioner unit is electrified, initialization reset is completed, and the air conditioner unit is in a standby state, and refrigerant working media (such as R410A, R and the like) used by a fluorine system of the whole air conditioner unit are arranged on a display panel of the air conditioner unit.

And 2, setting a minimum effective value Tmin for detecting the temperature of the pipeline thermal bulb on a display panel of the air conditioning unit. Wherein, when the lowest effective value Tmin of the temperature detection of the pipeline temperature sensing bulb is set. The temperature sensing bulb parameters of different materials are different according to the temperature sensing bulb technical parameter setting. In an embodiment of the present invention, only one of the plurality of pipeline thermal bulbs of the air conditioning unit is exemplarily described, and if the plurality of pipeline thermal bulbs are separately set, the respective minimum effective values for temperature detection need to be set.

Wherein, the pipe temperature can not be below minus 30 ℃ generally when the unit is in normal refrigeration operation, and can be below minus 30 ℃ only when the unit is in low-temperature refrigeration. The measuring range of the temperature sensing bulb is about-30 ℃, so that the pressure value 275Pa corresponding to Tmin = -30 and Tmin = -30 is determined, and when the pressure value is larger than 275Pa, the temperature sensing bulb is indicated to be in the normal measuring range, and the fault of the temperature sensing bulb can be judged; when the pressure value is less than 275Pa, the temperature sensing bulb range is exceeded, and fault detection of the temperature sensing bulb is shielded at the moment, so that fault of the temperature sensing bulb is prevented from being reported by mistake. For example: when the working medium is R410A, the theoretical value of the absolute pressure 275KPa corresponding to the environmental temperature is-30 ℃.

And 3, collecting the temperature Tc of the pipeline temperature sensing bulb.

And 4, judging whether the temperature sensing bulb is in fault according to a method for judging whether the temperature sensing bulb is in fault when the ambient temperature is normal, judging that the temperature sensing bulb is in fault when the temperature acquisition value Tc of the pipeline temperature sensing bulb is smaller than the minimum effective value Tmin of the temperature detection of the pipeline temperature sensing bulb, and otherwise, judging that the temperature sensing bulb is normal.

According to the scheme provided by the invention, when the current environment temperature does not exceed the detection range of the temperature sensing bulb, whether the temperature sensing bulb fails or not is judged according to the normal detection flow of the temperature sensing bulb, whether the temperature sensing bulb fails or not can be determined in time, and the situation that the temperature sensing bulb fails to continue to be controlled according to the detection value of the temperature sensing bulb is avoided.

When the measured temperature is lower, the resistance value of the temperature sensing bulb is higher, the voltage collected by the corresponding temperature sensing bulb detection circuit is smaller, and the AD value obtained by the singlechip is smaller; when the measured temperature is higher, the resistance value of the temperature sensing bulb is smaller, the voltage collected by the corresponding temperature sensing bulb detection circuit is larger, and the AD value obtained by the single chip microcomputer is larger. And looking up a table by the AD value to obtain the measured temperature. And when the AD value exceeds the range of the temperature sensing bulb range, judging that the temperature sensing bulb is in fault, for example, judging that the temperature sensing bulb is in fault (the temperature sensing bulb wire is loosened and damaged) if the AD value is less than 30 under the normal condition. The resistance value of the temperature sensing bulb at low temperature is as large as 362k omega at-30 ℃, the AD value of 10 bits =53 and the AD value at-40 ℃ is about 30, and the acquired AD value of the temperature sensing bulb is set to be less than 30 by a program, so that the temperature sensing bulb is in fault. When the device is started at a low temperature, the vacuumizing tube Wen Hui is reduced to below-40 ℃, and the acquired AD value is less than 30, so that the fault condition of the thermal bulb can be met. Therefore, when the pressure value is very low (in this example, the pressure value at 30 ℃ is =275Pa, and when the pressure value is smaller than 275 Pa), the condition of the AD value <30 is not judged, and the compressor is stopped without reporting the failure of the thermal bulb.

In step S140, in a case that a pressure sensor is disposed on a suction side of a compressor of the air conditioner, it is determined whether the current refrigerant pipeline temperature sensing bulb has a fault according to the current temperature and the lowest effective temperature by combining the current refrigerant type and the pressure sensor. In the scheme of the invention, when the pressure sensor is used, the pressure sensor can be used for judging that the tube Wen Jidi exceeds the range of the temperature sensing bulb due to vacuumizing when the compressor is started at low temperature, and the temperature sensing bulb is judged to be in fault by mistake.

Fig. 7 is a schematic structural diagram of an air conditioner according to an embodiment. The air conditioner shown in fig. 7, such as a machine room air conditioner, includes: the device comprises an evaporator, an electric heater 1, an electrode humidifier 2, an EC fan 3, a compressor, a high-voltage switch 6, an electronic expansion valve 4, a capillary tube (namely a parallel capillary tube) 5, an exhaust temperature sensing bulb 81, a low-voltage sensor 71, an evaporator outlet tube temperature sensing bulb 82, an evaporator inlet tube temperature sensing bulb 83 and a high-voltage sensor 72.

In the air conditioner shown in fig. 7, the first end of the evaporator is connected to the air inlet of the compressor through a first pipe. An evaporator outlet tube bulb 82 and a low pressure sensor 71 are provided on the first pipe. The exhaust port of the compressor is communicated to an exhaust pipe through a second pipeline, and an exhaust temperature sensing bulb 81 and a high-voltage switch 6 are arranged on the exhaust pipe of the compressor. And the second end of the evaporator is communicated with the second pipeline. And a throttling device is arranged on the second pipeline. A flow restriction device, comprising: an electronic expansion valve 4 and a capillary tube 5 connected in parallel. A high-pressure sensor 72 is provided on the second pipe on the input side of the throttle device. An evaporator inlet temperature sensing bulb 83 is provided on the second pipe, on the output side of the throttle device.

As shown in fig. 7, in an extremely low temperature environment, when a compressor of an air conditioning unit is just started, the temperature of a pipe at the inlet pipe side of the compressor is rapidly lowered, which easily causes the temperature sensing bulb at the inlet pipe side of the compressor to exceed the detection range, thus causing a false alarm fault of the temperature sensing bulb, and causing the unit to be unable to start and operate normally. In addition, under an extremely low temperature environment, when the air conditioning unit is in a standby state, the actual environment temperature exceeds the detection range of the temperature sensing bulb, so that the temperature sensing bulb is in a false alarm fault, and the complaint of a user is easily caused.

In consideration of this, the common working media for air conditioners are refrigerant R410A, refrigerant R22, and the like. The scheme of the invention provides a method for judging the fault of the temperature sensing bulb according to the thermal property (such as the thermal property of a refrigerant in a saturated state) of a working medium in the saturated state, in particular to a more reliable and low-cost method for avoiding the false alarm fault of the temperature sensing bulb facing to extremely low temperature.

In some embodiments, in the step S150, in the case that a pressure sensor is disposed on a suction side of a compressor of the air conditioner, a specific process of determining whether the current refrigerant pipeline thermal bulb fails or not is performed according to the current temperature and the lowest effective temperature by combining the current refrigerant type and the pressure sensor, as described in the following exemplary description.

With reference to the flow diagram of an embodiment of the method shown in fig. 3, which combines the current refrigerant type and the pressure sensor, and determines whether the current refrigerant pipeline temperature sensing bulb is faulty according to the current temperature and the minimum effective temperature, a specific process of determining whether the current refrigerant pipeline temperature sensing bulb is faulty according to the current temperature and the minimum effective temperature by combining the current refrigerant type and the pressure sensor in step S150 is further described, which includes: step S310 to step S330.

And step S310, acquiring a current pressure detection value of the pressure sensor, and recording the current pressure detection value as the current pressure.

Step S320, determining a theoretical temperature corresponding to the current pressure according to the current refrigerant type, such as a theoretical temperature value Tp.

And step S330, determining whether the current refrigerant pipeline temperature sensing bulb has a fault according to the current temperature and the lowest effective temperature under the condition that the theoretical temperature corresponding to the current pressure is determined.

As shown in fig. 8, the method for determining a failure of a bulb of an air conditioner further includes:

and 5, acquiring a pressure value P and executing step 6 when the pressure sensor configured on the whole air conditioning unit is normal, and executing step 4 if the pressure sensor is not configured on the whole air conditioning unit or the pressure sensor fails.

Step 6: and (3) converting a theoretical temperature value Tp corresponding to the current pressure P according to the saturated state thermal matter property (such as the refrigerant saturated state thermal matter property) of the working medium. For example: when the working medium is R410A, the theoretical value of the absolute pressure 275KPa corresponding to the environmental temperature is-30 ℃. An embodiment of the present invention is described only for an example of one of the pressure sensors, and if a plurality of pressure sensors are separately detected and used for temperature conversion at their installation positions.

According to the scheme, the corresponding temperature under the theoretical condition is obtained by collecting the suction pressure at the inlet pipe side of the compressor and converting the saturated state thermal physical property (such as the saturated state thermal physical property of the refrigerant) of the working medium, so that the defect of temperature detection over-range of the temperature sensing bulb is overcome, the problem of false alarm fault caused by temperature detection over-range of the temperature sensing bulb under the extremely low temperature environment is avoided, the normal starting of the air conditioning unit is ensured, and the air conditioning unit is safer and more reliable. Therefore, when the environmental temperature exceeds the effective detection range of the temperature sensing bulb in the extreme low temperature environment, the current corresponding temperature theoretical value is derived through pressure by utilizing the saturated state thermal property (such as the refrigerant saturated state thermal property) of the working medium, namely the temperature theoretical value corresponding to the current pressure value is converted according to the saturated state thermal property (such as the refrigerant saturated state thermal property) of the working medium, so that the defect of the detection over-range of the temperature sensing bulb is overcome, the false alarm fault of the temperature sensing bulb at the inlet pipe side of the compressor caused by the standby state of the air conditioning unit or the just starting state of the compressor in the extreme low temperature environment can be avoided, and the normal starting operation of the unit in the extreme low temperature condition of the unit is ensured. Compared with a related scheme, the temperature sensing device does not need a standby temperature sensing bulb, does not need a plurality of temperature sensing bulbs to be matched for detection, does not need self-checking, does not need to select a temperature sensing bulb with a better material texture, and has the advantages of strong universality, high safety and lower cost.

In some embodiments, with reference to the flowchart of an embodiment of determining whether the current refrigerant pipeline thermal bulb is faulty according to the current temperature and the minimum effective temperature in the method shown in fig. 4 when the theoretical temperature corresponding to the current pressure is determined, further describing a specific process of determining whether the current refrigerant pipeline thermal bulb is faulty according to the current temperature and the minimum effective temperature in step S330 when the theoretical temperature corresponding to the current pressure is determined, the specific process includes: step S410 to step S430.

Step S410, in case a theoretical temperature corresponding to the current pressure has been determined, determining whether the current temperature is less than the lowest effective temperature.

Step S420, if the current temperature is lower than the minimum effective temperature, determining whether the current refrigerant pipeline temperature sensing bulb is faulty according to the theoretical temperature and the minimum effective temperature.

In the step of step S430, the step of, if the current temperature is greater than or equal to the minimum effective temperature, and determining that the current refrigerant pipeline temperature sensing bulb is not in fault, namely determining that the current refrigerant pipeline temperature sensing bulb is normal.

As shown in fig. 8, the method for determining a failure of a bulb of an air conditioner further includes: and 7, judging whether the temperature collection value Tc of the pipeline temperature sensing bulb is smaller than the minimum effective value Tmin of the temperature detection of the pipeline temperature sensing bulb, and if not, judging that the pipeline temperature sensing bulb is in a normal state. If yes, go to step 8.

In some embodiments, with reference to a schematic flow chart of an embodiment of determining whether the current refrigerant pipeline temperature sensing bulb is faulty according to the theoretical temperature and the minimum effective temperature in the method of the present invention shown in fig. 5, a specific process of determining whether the current refrigerant pipeline temperature sensing bulb is faulty according to the theoretical temperature and the minimum effective temperature in step S420 is further described, which includes: step S510 to step S530.

Step S510, determining whether the theoretical temperature is less than the minimum effective temperature.

Step S520, if the theoretical temperature is lower than the minimum effective temperature, determining that the current temperature of the current refrigerant pipeline temperature sensing bulb exceeds the temperature detection range of the current refrigerant pipeline temperature sensing bulb, and shielding the fault detection function of the current refrigerant pipeline temperature sensing bulb.

Step S530, if the theoretical temperature is greater than or equal to the minimum effective temperature, determining that the current refrigerant pipeline temperature sensing bulb has a fault.

As shown in fig. 8, the method for determining a failure of a bulb of an air conditioner further includes: and 8, judging whether the theoretical temperature value Tp corresponding to the current pressure is smaller than the lowest effective value Tmin of the temperature detection of the pipeline temperature sensing bulb. If yes, the ambient temperature is beyond the effective temperature detection range of the temperature sensing bulb, and at the moment, fault processing of the temperature sensing bulb is shielded, and false alarm of the fault of the temperature sensing bulb is avoided. If not, judging that the pipeline temperature sensing bulb is in a fault state.

The resistance value of the thermal bulb at low temperature is as large as 362k omega at-30 ℃, the AD value of 10 bits is =53, the AD value at-40 ℃ is about 30, and the fault of the thermal bulb is determined when the AD value of the thermal bulb collected by the program is less than 30. When the device is started at a low temperature, the vacuumizing tube Wen Hui is reduced to below-40 ℃, and the acquired AD value is less than 30, so that the fault condition of the thermal bulb can be met. Therefore, when the pressure value is very low (in this embodiment, the-30 ℃ pressure value =275Pa, and when the pressure value is less than 275 Pa), the AD value <30 judgment condition is not performed, and the compressor is prevented from being stopped by reporting the failure of the thermal bulb.

In the scheme of the invention, the temperature is derived by mainly utilizing the saturated state thermal property (such as the saturated state thermal property of the refrigerant) of the working medium by using the pressure, and the temperature can also be used reversely, and the pressure is derived by using the temperature, so that the function that the pressure sensor and the temperature sensing bulb are mutually standby under special conditions is realized. For example: if the temperature sensing bulb fails, pressure simulation control can be used. If the pressure sensor is broken, the pressure can be simulated by the temperature sensing bulb for control, so that the shutdown is avoided, and the like.

According to the scheme of the invention, when the current ambient temperature exceeds the detection range of the temperature sensing bulb, the theoretical value of the corresponding temperature is calculated according to the saturated state thermal property (such as the saturated state thermal property of the refrigerant) of the working medium (for example, when the working medium is R410A, the theoretical value of the ambient temperature corresponding to the absolute pressure 275KPa is-30 ℃), so that the data of the part exceeding the detection range of the temperature sensing bulb is compensated, and the false alarm fault of the temperature sensing bulb under the extremely low temperature environment is prevented.

It should be noted that the scheme of the present invention is relatively applicable to the stage when the compressor is just started (for example, within 3 minutes from the start of the compressor) or the stage when the compressor is not started in the standby state, and the compressor is not recommended to be used after the compressor is started to operate for a certain period of time (for example, after the compressor is started to operate for 3 minutes), because the fluorine system has effectively circulated after the compressor operates for a certain period of time, the whole fluorine system is in a relatively normal state.

By adopting the technical scheme of the embodiment, the lowest effective temperature (such as the lowest effective value Tmin for detecting the temperature of the pipeline temperature sensing bulb) of the refrigerant pipeline temperature sensing bulb of the air conditioner is determined, the current temperature of the refrigerant pipeline temperature sensing bulb is collected, and whether the temperature sensing bulb is in fault or not is determined according to the current temperature and the lowest effective temperature of the refrigerant pipeline temperature sensing bulb. The method comprises the steps that a pressure sensor is arranged on the air suction side of a compressor of the air conditioner, and under the condition that the pressure sensor is not in fault, the current pressure of the pressure sensor is collected, a theoretical temperature value corresponding to the current pressure is determined according to the thermal-physical property of a refrigerant in a saturated state of the refrigerant used by the air conditioner, and when whether the current temperature of a refrigerant pipeline temperature sensing bulb of the air conditioner exceeds the temperature detection range of the refrigerant pipeline temperature sensing bulb per se is determined according to the current temperature and the lowest effective temperature of the refrigerant pipeline temperature sensing bulb and the theoretical temperature value corresponding to the current pressure of the pressure sensor, the fault detection function of the temperature sensing bulb of the air conditioner is shielded when whether the current temperature of the refrigerant pipeline temperature sensing bulb of the air conditioner exceeds the temperature detection range of the refrigerant pipeline temperature sensing bulb per se. Therefore, when the actual temperature of the environment where the temperature sensing bulb of the air conditioner is located is determined to exceed the temperature detection range of the temperature sensing bulb, the fault detection function of the temperature sensing bulb of the air conditioner is shielded, and the temperature sensing bulb of the air conditioner is prevented from misrepresenting the fault of the temperature sensing bulb due to the fact that the temperature sensing bulb of the air conditioner exceeds the temperature detection range of the temperature sensing bulb.

According to the embodiment of the invention, the fault determining device of the air-conditioning bulb is also provided, which corresponds to the fault determining method of the air-conditioning bulb. Referring to fig. 6, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The air conditioner temperature sensing bulb comprises: and the temperature sensing bulb is arranged at the refrigerant pipeline of the air conditioner and is marked as a refrigerant pipeline temperature sensing bulb. The number of the refrigerant pipelines is more than one, the number of the refrigerant pipeline temperature sensing bags is at least as large as that of the refrigerant pipelines, and actually, the number of the refrigerant pipeline temperature sensing bags can be larger than or equal to that of the refrigerant pipelines. And recording one refrigerant pipeline temperature sensing package to be detected in more than one refrigerant pipeline temperature sensing package as the current refrigerant pipeline temperature sensing package. The fault determination device of the air conditioner temperature sensing bulb comprises: the control unit is configured to perform fault determination on the current refrigerant pipeline temperature sensing bulb within a first set time after the compressor of the air conditioner is started or under the condition that the whole machine of the air conditioner is in a standby state and the compressor of the air conditioner is not started. Wherein, the control unit carries out the trouble to current refrigerant pipeline temperature sensing bulb and confirms, includes: an acquisition module 102 and a control module 104.

The control module 104 is configured to determine a type of a refrigerant used by the air conditioner, and record the type as a current refrigerant type. The specific functions and processes of the control module 104 are shown in step S110.

The control module 104 is further configured to determine a lowest effective value of a temperature detection value of the current refrigerant pipeline temperature sensing bulb, and record the lowest effective value as a lowest effective temperature. The detailed function and processing of the control module 104 are also referred to in step S120.

The obtaining module 102 is configured to obtain a current temperature detection value of the current refrigerant pipeline thermal bulb, and record the current temperature detection value as a current temperature. The specific functions and processes of the acquiring module 102 are shown in step S130.

In some embodiments, the determining, by the control module 104, whether the current refrigerant pipeline temperature sensing bulb is faulty according to the current temperature and the lowest effective temperature includes:

the control module (104) is adapted to control the operation of the motor, and in particular is further configured to determine whether the current temperature is less than the least significant temperature. The specific functions and processes of the control module 104 are also shown in step S210.

The control module 104 is further specifically configured to determine that the current refrigerant pipeline bulb is faulty if the current temperature is less than the minimum effective temperature. The specific functions and processes of the control module 104 are also shown in step S220.

The control module 104 is further specifically configured to determine that the current refrigerant pipeline temperature sensing bulb is not in fault if the current temperature is greater than or equal to the lowest effective temperature, that is, determine that the current refrigerant pipeline temperature sensing bulb is normal. The specific functions and processes of the control module 104 are also shown in step S230.

Fig. 8 is a flowchart illustrating an embodiment of a thermal bulb failure determination apparatus of an air conditioner. As shown in fig. 8, the apparatus for determining a failure in a bulb of an air conditioner includes:

And 2, setting a minimum effective value Tmin for detecting the temperature of the pipeline thermal bulb on a display panel of the air conditioning unit. Wherein, when the lowest effective value Tmin of the temperature detection of the pipeline temperature sensing bulb is set. The temperature sensing bulb parameters of different materials are different according to the temperature sensing bulb technical parameter setting. In an embodiment of the present invention, only one of the plurality of pipeline thermal bulbs of the air conditioning unit is exemplarily described, and if the plurality of pipeline thermal bulbs are separately arranged, the respective minimum effective values of temperature detection need to be set.

And 3, collecting the temperature Tc of the pipeline temperature sensing bulb.

And 4, judging whether the temperature sensing bulb is in fault according to a judging device for judging whether the temperature sensing bulb is in fault when the ambient temperature is normal, judging that the temperature sensing bulb is in fault when the temperature acquisition value Tc of the pipeline temperature sensing bulb is smaller than the minimum effective value Tmin of the temperature detection of the pipeline temperature sensing bulb, and otherwise, judging that the temperature sensing bulb is normal.

The control module 104 is further configured to determine whether the current refrigerant pipeline temperature sensing bulb fails according to the current temperature and the lowest effective temperature by combining the current refrigerant type and the pressure sensor under the condition that a pressure sensor is arranged on a suction side of a compressor of the air conditioner. The specific functions and processes of the control module 104 are also shown in step S140.

Fig. 7 is a schematic view of the overall structure of an embodiment of the air conditioner. The air conditioner shown in fig. 7, such as a room air conditioner, includes: the system comprises an evaporator, an electric heater 1, an electrode humidifier 2, an EC fan 3, a compressor, a high-voltage switch 6, an electronic expansion valve 4, a capillary tube (namely a parallel capillary tube) 5, an exhaust temperature sensing bulb 81, a low-voltage sensor 71, an evaporator outlet tube temperature sensing bulb 82, an evaporator inlet tube temperature sensing bulb 83 and a high-voltage sensor 72.

In the air conditioner shown in fig. 7, the first end of the evaporator is connected to the air inlet of the compressor through a first pipe. An evaporator outlet tube bulb 82 and a low pressure sensor 71 are provided on the first pipe. The exhaust port of the compressor is communicated to an exhaust pipe through a second pipeline, and an exhaust temperature sensing bulb 81 and a high-voltage switch 6 are arranged on the exhaust pipe of the compressor. And the second end of the evaporator is communicated with the second pipeline. And a throttling device is arranged on the second pipeline. A flow restriction device, comprising: an electronic expansion valve 4 and a capillary tube 5 connected in parallel. A high-pressure sensor 72 is provided in the second line on the input side of the throttle device. An evaporator inlet temperature sensing bulb 83 is provided on the second pipe, on the output side of the throttle device.

In consideration of this, the common working media for air conditioners are refrigerant R410A, refrigerant R22, and the like. The scheme of the invention provides a temperature sensing bulb fault judging device according to the saturated state thermal property (such as the refrigerant saturated state thermal property) of a working medium, in particular to a more reliable and low-cost device which is oriented to extreme low temperature and avoids false alarm of a temperature sensing bulb fault.

In some embodiments, the determining, by the control module 104, whether the current refrigerant pipeline temperature sensing bulb has a fault according to the current temperature and the lowest effective temperature by combining the current refrigerant type and the pressure sensor when a pressure sensor is disposed on a suction side of a compressor of the air conditioner includes:

the obtaining module 102 is specifically configured to obtain a current pressure detection value of the pressure sensor, which is recorded as the current pressure. The specific functions and processes of the acquiring module 102 are also referred to in step S310.

The control module 104 is further specifically configured to determine a theoretical temperature, such as a theoretical temperature value Tp, corresponding to the current pressure according to the current refrigerant type. The specific functions and processes of the control module 104 are also shown in step S320.

The control module 104 is further specifically configured to determine whether the current refrigerant pipeline temperature sensing bulb is faulty according to the current temperature and the lowest effective temperature when the theoretical temperature corresponding to the current pressure is determined. The specific functions and processes of the control module 104 are also shown in step S330.

As shown in fig. 8, the apparatus for determining a failure in a bulb of an air conditioner further includes:

And 6: and (3) converting a theoretical temperature value Tp corresponding to the current pressure P according to the saturated state thermal matter property (such as the refrigerant saturated state thermal matter property) of the working medium. An embodiment of the present invention is described only for an example of one of the pressure sensors, and if a plurality of pressure sensors are separately detected and used for temperature conversion at their installation positions.

In some embodiments, the determining, by the control module 104 and based on the current temperature and the lowest effective temperature, whether the current refrigerant line bulb is faulty when the theoretical temperature corresponding to the current pressure is determined includes:

the control module 104 is further specifically configured to determine whether the current temperature is less than the lowest effective temperature if a theoretical temperature corresponding to the current pressure has been determined. The detailed function and processing of the control module 104 are also shown in step S410.

The control module 104 is further specifically configured to determine whether the current refrigerant pipeline temperature sensing bulb is faulty according to the theoretical temperature and the minimum effective temperature if the current temperature is less than the minimum effective temperature. The specific functions and processes of the control module 104 are also shown in step S420.

The control module 104 is further specifically configured to determine that the current refrigerant pipeline temperature sensing bulb is not in fault if the current temperature is greater than or equal to the lowest effective temperature, that is, determine that the current refrigerant pipeline temperature sensing bulb is normal. The specific functions and processes of the control module 104 are also shown in step S430.

As shown in fig. 8, the apparatus for determining a bulb fault of an air conditioner further includes:

and 7, judging whether the temperature collection value Tc of the pipeline temperature sensing bulb is smaller than the minimum effective value Tmin of the temperature detection of the pipeline temperature sensing bulb, and if not, judging that the pipeline temperature sensing bulb is in a normal state. If yes, go to step 8.

In some embodiments, the determining, by the control module 104, whether the current refrigerant pipeline bulb has a fault according to the theoretical temperature and the minimum effective temperature includes:

the control module 104 is further specifically configured to determine whether the theoretical temperature is less than the minimum effective temperature. The specific functions and processes of the control module 104 are also shown in step S510.

The control module 104 is specifically configured to determine that the current temperature of the current refrigerant pipeline temperature sensing bulb exceeds the temperature detection range of the current refrigerant pipeline temperature sensing bulb if the theoretical temperature is lower than the minimum effective temperature, and shield the fault detection function of the current refrigerant pipeline temperature sensing bulb. The specific functions and processes of the control module 104 are also shown in step S520.

The control module 104 is further specifically configured to determine that the current refrigerant pipeline bulb is faulty if the theoretical temperature is greater than or equal to the minimum effective temperature. The specific functions and processes of the control module 104 are also referred to in step S530.

and 8, judging whether the theoretical temperature value Tp corresponding to the current pressure is smaller than the lowest effective value Tmin of the temperature detection of the pipeline temperature sensing bulb. If yes, the ambient temperature is beyond the effective temperature detection range of the temperature sensing bulb, and at the moment, fault processing of the temperature sensing bulb is shielded, and false alarm of the fault of the temperature sensing bulb is avoided. If not, judging that the pipeline temperature sensing bulb is in a fault state.

According to the scheme of the invention, when the current ambient temperature exceeds the detection range of the temperature sensing bulb, the theoretical value of the corresponding temperature is converted according to the saturated state thermal property (such as the saturated state thermal property of a refrigerant) of the working medium (for example, when the working medium is R410A, the absolute pressure 275KPa corresponds to the theoretical value of the ambient temperature and is-30 ℃), so that the data of the part exceeding the detection range of the temperature sensing bulb is compensated, and the false alarm fault of the temperature sensing bulb in the extremely low temperature environment is prevented.

Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the method, reference may be made to the related descriptions in the embodiments without being detailed in the description of this embodiment, which is not described herein again.

By adopting the technical scheme of the invention, the current pressure of the pressure sensor is collected under the condition that the pressure sensor is arranged at the air suction side of the compressor of the air conditioner and the pressure sensor is not in fault, the theoretical temperature value corresponding to the current pressure is determined according to the refrigerant saturation state thermal physical property of the refrigerant used by the air conditioner, and whether the current temperature of the refrigerant pipeline temperature sensing bulb of the air conditioner exceeds the temperature detection range of the refrigerant pipeline temperature sensing bulb per se is determined according to the current temperature and the lowest effective temperature of the refrigerant pipeline temperature sensing bulb and the theoretical temperature value corresponding to the current pressure of the pressure sensor, so that the temperature sensing bulb fault detection function of the air conditioner is shielded and the temperature sensing bulb fault is prevented from being reported by mistake when the current temperature of the refrigerant pipeline temperature sensing bulb of the air conditioner exceeds the temperature detection range of the refrigerant pipeline temperature sensing bulb per se.

According to the embodiment of the invention, the air conditioner corresponding to the fault determination device of the air conditioner temperature sensing bulb is further provided. The air conditioner may include: the fault determination device of the air conditioner temperature sensing bulb is described above.

Since the processing and functions of the air conditioner of this embodiment are basically corresponding to the embodiments, principles and examples of the foregoing devices, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of this embodiment.

By adopting the technical scheme of the invention, the current pressure of the pressure sensor is collected under the condition that the pressure sensor is arranged at the air suction side of the compressor of the air conditioner and the pressure sensor is not in fault, the theoretical temperature value corresponding to the current pressure is determined according to the refrigerant saturation state thermal physical property of the refrigerant used by the air conditioner, and when the current temperature of the refrigerant pipeline temperature sensing bulb of the air conditioner is determined to be beyond the temperature detection range of the refrigerant pipeline temperature sensing bulb according to the current temperature and the minimum effective temperature of the refrigerant pipeline temperature sensing bulb and the theoretical temperature value corresponding to the current pressure of the pressure sensor, the temperature sensing bulb fault detection function of the air conditioner is shielded when the current temperature of the refrigerant pipeline temperature sensing bulb of the air conditioner is beyond the temperature detection range of the refrigerant pipeline temperature sensing bulb, the compressor is prevented from being stopped due to fault of the temperature sensing bulb under the low-temperature condition, and the user complaint caused by the fault of the temperature sensing bulb under the low-temperature standby condition is also prevented.

According to an embodiment of the present invention, there is also provided a storage medium corresponding to a fault determination method for an air conditioner temperature sensing bulb, where the storage medium includes a stored program, and the apparatus where the storage medium is located is controlled to execute the above fault determination method for an air conditioner temperature sensing bulb when the program runs.

Since the processing and functions implemented by the storage medium of this embodiment substantially correspond to the embodiments, principles, and examples of the foregoing method, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of this embodiment.

By adopting the technical scheme of the invention, the current pressure of the pressure sensor is collected under the condition that the pressure sensor is arranged at the air suction side of the compressor of the air conditioner and the pressure sensor is not in fault, the theoretical temperature value corresponding to the current pressure is determined according to the refrigerant saturation state thermal physical property of the refrigerant used by the air conditioner, and whether the current temperature of the refrigerant pipeline temperature sensing bulb of the air conditioner exceeds the temperature detection range of the refrigerant pipeline temperature sensing bulb is determined according to the current temperature and the minimum effective temperature of the refrigerant pipeline temperature sensing bulb and the theoretical temperature value corresponding to the current pressure of the pressure sensor, so that the temperature sensing bulb fault detection function of the air conditioner is shielded when the current temperature of the refrigerant pipeline temperature sensing bulb of the air conditioner exceeds the temperature detection range of the refrigerant pipeline temperature sensing bulb, the false alarm fault of the compressor inlet pipe side caused by the standby state of the air conditioner unit or the just started state of the compressor under the extreme low temperature environment is avoided, and the normal starting operation of the unit under the extreme low temperature condition is ensured.

In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A fault determination method for an air conditioner temperature sensing bulb is characterized by comprising the following steps: the temperature sensing bulb is arranged at a refrigerant pipeline of the air conditioner and is marked as a refrigerant pipeline temperature sensing bulb; the number of the refrigerant pipelines is more than one, and the number of the refrigerant pipeline temperature sensing packages is at least as large as that of the refrigerant pipelines; recording one refrigerant pipeline temperature sensing package to be detected in more than one refrigerant pipeline temperature sensing package as a current refrigerant pipeline temperature sensing package; the method for determining the fault of the air conditioner temperature sensing bulb comprises the following steps: performing fault determination on the current refrigerant pipeline temperature sensing bulb within a first set time after the compressor of the air conditioner is started or under the condition that the whole machine of the air conditioner is in a standby state and the compressor of the air conditioner is not started; wherein, confirm to current refrigerant pipeline temperature sensing package trouble includes:

determining the type of a refrigerant used by the air conditioner, and recording the type as the current refrigerant type;

determining the minimum effective value of the temperature detection value of the current refrigerant pipeline temperature sensing bulb, and recording the minimum effective value as the minimum effective temperature;

acquiring a current temperature detection value of the current refrigerant pipeline temperature sensing bulb, and recording the current temperature detection value as a current temperature;

under the condition that a pressure sensor is arranged on the air suction side of a compressor of the air conditioner, determining whether the current refrigerant pipeline temperature sensing bulb is in fault or not according to the current temperature and the lowest effective temperature by combining the current refrigerant type and the pressure sensor;

when the actual temperature of the environment where the temperature sensing bulb of the air conditioner is located is determined to exceed the temperature detection range of the temperature sensing bulb, the fault detection function of the temperature sensing bulb of the air conditioner is shielded, and the temperature sensing bulb of the air conditioner is prevented from misreporting the fault of the temperature sensing bulb due to the fact that the temperature sensing bulb of the air conditioner exceeds the temperature detection range of the temperature sensing bulb.

2. The method for determining the fault of the temperature sensing bulb of the air conditioner as claimed in claim 1, wherein the step of determining whether the temperature sensing bulb of the current refrigerant pipeline has the fault according to the current temperature and the lowest effective temperature comprises the following steps:

determining whether the current temperature is less than the minimum effective temperature;

if the current temperature is lower than the minimum effective temperature, determining that the current refrigerant pipeline temperature sensing bulb has a fault;

and if the current temperature is greater than or equal to the minimum effective temperature, determining that the current refrigerant pipeline temperature sensing bulb is not in fault, namely determining that the current refrigerant pipeline temperature sensing bulb is normal.

3. The method for determining the fault of the air-conditioner bulb according to claim 1, wherein under the condition that a pressure sensor is arranged on a compressor suction side of the air conditioner, determining whether the current refrigerant pipeline bulb has the fault according to the current temperature and the lowest effective temperature by combining the current refrigerant type and the pressure sensor comprises the following steps:

acquiring a current pressure detection value of the pressure sensor, and recording the current pressure detection value as current pressure;

determining a theoretical temperature corresponding to the current pressure according to the current refrigerant type;

and under the condition that the theoretical temperature corresponding to the current pressure is determined, determining whether the current refrigerant pipeline temperature sensing bulb has a fault according to the current temperature and the lowest effective temperature.

4. The method for determining the fault of the air conditioner bulb according to claim 3, wherein in the case that the theoretical temperature corresponding to the current pressure is determined, determining whether the current refrigerant pipeline bulb is faulty according to the current temperature and the lowest effective temperature comprises:

determining whether the current temperature is less than the lowest effective temperature, in a case where a theoretical temperature corresponding to the current pressure has been determined;

if the current temperature is lower than the minimum effective temperature, determining whether the current refrigerant pipeline temperature sensing bulb is in fault or not according to the theoretical temperature and the minimum effective temperature;

5. The method for determining the fault of the air-conditioning bulb according to claim 4, wherein determining whether the current refrigerant pipeline bulb is faulty according to the theoretical temperature and the minimum effective temperature comprises:

determining whether the theoretical temperature is less than the minimum effective temperature;

if the theoretical temperature is lower than the minimum effective temperature, determining that the current temperature of the current refrigerant pipeline temperature sensing bulb exceeds the temperature detection range of the current refrigerant pipeline temperature sensing bulb, and shielding the fault detection function of the current refrigerant pipeline temperature sensing bulb;

and if the theoretical temperature is greater than or equal to the minimum effective temperature, determining that the current refrigerant pipeline temperature sensing bulb has a fault.

6. A fault determination device of an air conditioner temperature sensing bulb is characterized in that the air conditioner temperature sensing bulb comprises: the temperature sensing bulb is arranged at a refrigerant pipeline of the air conditioner and is marked as a refrigerant pipeline temperature sensing bulb; the number of the refrigerant pipelines is more than one, and the number of the refrigerant pipeline temperature sensing packages is at least as large as that of the refrigerant pipelines; recording one refrigerant pipeline temperature sensing package to be detected in more than one refrigerant pipeline temperature sensing package as a current refrigerant pipeline temperature sensing package; the fault determination device of the air conditioner temperature sensing bulb comprises: the control unit is configured to perform fault determination on the current refrigerant pipeline temperature sensing bulb within a first set time after the compressor of the air conditioner is started or under the condition that the whole machine of the air conditioner is in a standby state and the compressor of the air conditioner is not started; wherein, the control unit carries out the trouble to current refrigerant pipeline temperature sensing bulb and confirms, includes:

the control module is configured to determine the type of a refrigerant used by the air conditioner and record the type as the current refrigerant type;

the control module is also configured to determine the lowest effective value of the temperature detection value of the current refrigerant pipeline temperature sensing bulb and record the lowest effective value as the lowest effective temperature;

the acquisition module is configured to acquire a current temperature detection value of the current refrigerant pipeline temperature sensing bulb and record the current temperature detection value as a current temperature;

the control module is further configured to determine whether the current refrigerant pipeline temperature sensing bulb is in fault or not according to the current temperature and the lowest effective temperature by combining the current refrigerant type and the pressure sensor under the condition that the pressure sensor is arranged on the air suction side of the compressor of the air conditioner;

7. The apparatus as claimed in claim 6, wherein the control module determines whether the current refrigerant pipeline bulb is faulty according to the current temperature and the lowest effective temperature, and comprises:

if the current temperature is lower than the lowest effective temperature, determining that the current refrigerant pipeline temperature sensing bulb has a fault;

8. The apparatus as claimed in claim 6, wherein the control module, in a case that a pressure sensor is disposed at a suction side of a compressor of the air conditioner, determines whether the current refrigerant pipeline thermal bulb is faulty according to the current temperature and the lowest effective temperature by combining the current refrigerant type and the pressure sensor, and includes:

9. The apparatus of claim 8, wherein the control module, when determining the theoretical temperature corresponding to the current pressure, determines whether the current refrigerant line bulb is faulty according to the current temperature and the lowest effective temperature, comprises:

determining whether the current temperature is less than the lowest effective temperature if a theoretical temperature corresponding to the current pressure has been determined;

if the current temperature is greater than or equal to the minimum effective temperature, and determining that the current refrigerant pipeline temperature sensing bulb is not in fault, namely determining that the current refrigerant pipeline temperature sensing bulb is normal.

10. The apparatus as claimed in claim 9, wherein the control module determines whether the current refrigerant pipeline thermal bulb is faulty according to the theoretical temperature and the minimum effective temperature, and includes:

11. An air conditioner, comprising: the failure determining apparatus of the air conditioner bulb as claimed in any one of claims 6 to 10.

12. A storage medium, characterized in that the storage medium comprises a stored program, wherein when the program runs, the equipment where the storage medium is located is controlled to execute the fault determination method of the air conditioner temperature sensing package according to any one of claims 1 to 5.