CN112797568A - Error detection method and device for inner machine temperature sensing bulb, air conditioner and storage medium - Google Patents
Error detection method and device for inner machine temperature sensing bulb, air conditioner and storage medium Download PDFInfo
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- CN112797568A CN112797568A CN202011612735.1A CN202011612735A CN112797568A CN 112797568 A CN112797568 A CN 112797568A CN 202011612735 A CN202011612735 A CN 202011612735A CN 112797568 A CN112797568 A CN 112797568A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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Abstract
The invention provides an error detection method and device for a temperature sensing bulb of an internal machine, an air conditioner and a storage medium, and relates to the technical field of air conditioners. The error detection method for the inner machine temperature sensing bulb comprises the following steps: receiving a first temperature value detected and sent by a first temperature sensing bulb, a second temperature value detected and sent by a second temperature sensing bulb and a third temperature value detected and sent by a third temperature sensing bulb; and sending out a bulb error signal according to the magnitude relation of two of the first temperature value, the second temperature value and the third temperature value and the change condition of the opening degree of the expansion valve in a period of continuous preset times. The invention also provides an error detection device for the inner machine temperature sensing bulb, an air conditioner and a storage medium, which can execute the error detection method for the inner machine temperature sensing bulb. The error detection method and device for the temperature sensing bulb of the internal machine, the air conditioner and the storage medium can solve the technical problem that the error detection of the temperature sensing bulb in the prior art is difficult.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an error detection method and device for a temperature bulb of an internal unit, an air conditioner and a storage medium.
Background
With the continuous development of air conditioners, production efficiency improvement is an important way for lowering costs in the air conditioner industry, and more air conditioners can be produced within a certain time through production efficiency improvement. But also easily causes misoperation to affect the quality of products. The error which is most prone to occur in the air conditioner production and is difficult to remove when the air conditioner is delivered from a factory is the insertion process of the temperature sensing bulb.
An indoor unit heat exchanger assembly of an air conditioner generally comprises three temperature sensing bags, including an air pipe temperature sensing bag, a liquid pipe temperature sensing bag and a middle pipe temperature sensing bag. The same temperature sensor is used in three locations. At present, three temperature sensing bags are marked by different colors in production, but the wrong insertion of workers is difficult to avoid. If the three temperature sensing bulbs are inserted wrongly, the system control is disordered, and in the after-sale inspection process, the problem that whether the temperature sensing bulbs are inserted wrongly is difficult to find through specific phenomena.
Disclosure of Invention
The invention solves the technical problem of difficulty in checking the mounting error of the temperature sensing bulb in the prior art.
In order to solve the above problem, the present invention provides an error detection method for an internal machine thermal bulb, which is used to detect whether the installation positions of a first thermal bulb, a second thermal bulb and a third thermal bulb installed in an internal machine are wrong, where the first thermal bulb is used to be installed in an air pipe of the internal machine, the second thermal bulb is used to be installed in a liquid pipe of the internal machine, the third thermal bulb is used to be installed in an evaporator, the internal machine further includes an expansion valve, the expansion valve is arranged on the liquid pipe and is located on one side of the second thermal bulb away from the evaporator, and the error detection method for the internal machine thermal bulb includes:
receiving a first temperature value detected and sent by the first temperature sensing bulb, a second temperature value detected and sent by the second temperature sensing bulb and a third temperature value detected and sent by the third temperature sensing bulb;
and sending out a thermal bulb error signal according to the magnitude relation of two of the first temperature value, the second temperature value and the third temperature value and the change condition of the opening degree of the expansion valve in a period of continuous preset times.
Compared with the prior art, the error detection method for the inner machine temperature sensing bulb provided by the embodiment of the invention has the beneficial effects that:
the error detection method for the inner machine temperature sensing bulb can preliminarily judge whether the error installation condition exists through the size relationship of two of a first temperature value detected by the first temperature sensing bulb, a second temperature value detected by the second temperature sensing bulb and a third temperature value detected by the third temperature sensing bulb. Because the opening degree adjustment of the expansion valve is related to the first temperature value, the second temperature value and the third temperature value, whether the first temperature sensing bulb, the second temperature sensing bulb and the third temperature sensing bulb are installed wrongly or not can be accurately judged according to the opening degree change condition of the expansion valve. The technical problem that the mounting error of the temperature-sensing bulb is difficult to check in the prior art can be solved, and meanwhile, the accuracy of detecting whether the first temperature-sensing bulb, the second temperature-sensing bulb and the third temperature-sensing bulb are mounted with errors or not can be improved.
Optionally, the step of sending a bulb error signal according to a magnitude relationship between two of the first temperature value, the second temperature value, and the third temperature value and a change condition of the opening degree of the expansion valve in a period of continuing the preset number of times includes:
under the condition that the internal machine operates in the refrigeration mode, calculating a difference value between the second temperature value and the third temperature value to obtain a first difference value;
judging whether the absolute value of the first difference is smaller than a first preset value or not;
and if not, sending out the error signal of the temperature sensing bulb according to the condition that the opening degree of the expansion valve is reduced in the period of continuously presetting the times.
Optionally, the method further comprises:
if the result of judging whether the absolute value of the first difference is smaller than the first preset value is yes, comparing a first temperature value with a second temperature value;
and if the first temperature value is less than or equal to the second temperature value, sending out a thermal bulb error signal according to the condition that the opening degree of the expansion valve is reduced in the period of continuous preset times.
Optionally, the method further comprises:
if the first temperature value is greater than the second temperature value, calculating a difference value of the first temperature value minus the second temperature value to obtain a second difference value;
comparing the second difference value with a second preset value;
and if the second difference is smaller than or equal to the second preset value, sending out the temperature sensing bulb error signal according to the condition that the opening degree of the expansion valve is reduced in the period of continuous preset times.
Optionally, the method further comprises:
if the second difference value is larger than the second preset value, comparing the first temperature value with the third temperature value;
and if the first temperature value is less than or equal to the third temperature value, sending out a thermal bulb error signal according to the condition that the opening degree of the expansion valve is reduced in the period of continuous preset times.
Optionally, the method further comprises:
if the first temperature value is greater than the third temperature value, calculating a difference value of the first temperature value minus the third temperature value to obtain a third difference value;
comparing the third difference value with a third preset value;
and if the third difference is smaller than or equal to the third preset value, sending out the temperature sensing bulb error signal according to the condition that the opening degree of the expansion valve is reduced in the period of continuous preset times.
Optionally, the method further comprises:
and if the second difference is smaller than or equal to the second preset value and the opening degree of the expansion valve does not meet the requirement of decreasing in the period of continuing the preset times, executing the step of comparing the first temperature value and the third temperature value.
Optionally, the step of sending a bulb error signal according to a magnitude relationship between two of the first temperature value, the second temperature value, and the third temperature value and a change condition of the opening degree of the expansion valve in a period of continuing the preset number of times includes:
if the operation mode of the internal machine is a heating mode, judging whether the third temperature value is greater than the second temperature value;
and if not, sending out the error signal of the temperature sensing bulb according to the change condition that the opening degree of the expansion valve is reduced in the period of continuously presetting the times.
Optionally, the method further comprises:
if the result of judging whether the third temperature value is greater than the second temperature value is yes, calculating a difference value of the third temperature value minus the second temperature value to obtain a fourth difference value;
judging whether the fourth difference value is larger than a fourth preset value and smaller than a fifth preset value, wherein the fourth preset value is smaller than the fifth preset value;
and if not, sending out the error signal of the temperature sensing bulb according to the change condition that the opening degree of the expansion valve is reduced in the period of continuously presetting the times.
Optionally, the method further comprises:
if the result of judging whether the fourth difference value is larger than a fourth preset value and smaller than a fifth preset value is yes, calculating a difference value of subtracting the third temperature value from the first temperature value to obtain a fifth difference value;
judging whether the fifth difference value is larger than a sixth preset value or not;
if not, calculating a difference value obtained by subtracting the second temperature value from the first temperature value to obtain a sixth difference value;
judging whether the sixth difference value is larger than the sixth preset value;
and if the result of judging whether the sixth difference value is larger than the sixth preset value is negative, sending a temperature sensing bulb error signal.
Optionally, the method further comprises:
and if the result of judging whether the fourth difference value is larger than a fourth preset value and smaller than a fifth preset value is negative and the opening degree of the expansion valve does not meet the requirement of reduction in the period of continuous preset times, executing the step of calculating the difference value of subtracting the third temperature value from the first temperature value to obtain a fifth difference value.
An internal machine thermal bulb error detection device, comprising:
the receiving module is used for receiving a first temperature value detected and sent by the first temperature sensing bulb, a second temperature value detected and sent by the second temperature sensing bulb and a third temperature value detected and sent by the third temperature sensing bulb; the first temperature sensing bulb is used for being installed on an air pipe of the indoor unit, the second temperature sensing bulb is used for being installed on a liquid pipe of the indoor unit, the third temperature sensing bulb is used for being installed on an evaporator, and the expansion valve is arranged on the liquid pipe and located on one side, far away from the evaporator, of the second temperature sensing bulb;
and the control module is used for sending out a thermal bulb error signal according to the size relationship of two of the first temperature value, the second temperature value and the third temperature value and the change condition of the opening degree of the expansion valve in a period of continuous preset times.
An air conditioner comprises an inner machine and a controller, wherein a first temperature sensing bulb, a second temperature sensing bulb, a third temperature sensing bulb, an evaporator and an expansion valve are arranged in the inner machine; the first temperature sensing bulb is installed on an air pipe of the inner machine, the second temperature sensing bulb is installed on a liquid pipe of the inner machine, the third temperature sensing bulb is installed on the evaporator, and the expansion valve is arranged on the liquid pipe and located on one side, far away from the evaporator, of the second temperature sensing bulb; the first temperature sensing bulb, the second temperature sensing bulb, the third temperature sensing bulb and the expansion valve are all electrically connected with the controller, and the controller is used for executing an inner machine temperature sensing bulb error detection method. The error detection method of the inner machine temperature sensing bulb comprises the following steps:
receiving a first temperature value detected and sent by the first temperature sensing bulb, a second temperature value detected and sent by the second temperature sensing bulb and a third temperature value detected and sent by the third temperature sensing bulb;
and sending out a thermal bulb error signal according to the magnitude relation of two of the first temperature value, the second temperature value and the third temperature value and the change condition of the opening degree of the expansion valve in a period of continuous preset times.
A computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements an internal machine thermal bulb error detection method. The error detection method of the inner machine temperature sensing bulb comprises the following steps:
receiving a first temperature value detected and sent by the first temperature sensing bulb, a second temperature value detected and sent by the second temperature sensing bulb and a third temperature value detected and sent by the third temperature sensing bulb;
and sending out a thermal bulb error signal according to the magnitude relation of two of the first temperature value, the second temperature value and the third temperature value and the change condition of the opening degree of the expansion valve in a period of continuous preset times.
The beneficial effects of the error detection device for the indoor unit temperature sensing bulb, the air conditioner and the storage medium provided in the embodiment of the invention relative to the prior art are the same as the beneficial effects of the error detection method for the indoor unit temperature sensing bulb relative to the prior art provided above, and are not described herein again.
Drawings
Fig. 1 is a partial structural schematic view of an air conditioner provided in an embodiment of the present application;
fig. 2 is a system block diagram of an air conditioner provided in an embodiment of the present application;
fig. 3 is a flowchart of an error detection method for an internal machine thermal bulb provided in an embodiment of the present application;
fig. 4 is a partial flowchart of step S2 in the error detection method for the thermal bulb of the internal machine provided in the embodiment of the present application;
FIG. 5 is a graph showing the relationship between pressure and enthalpy for the case where the air conditioner operates in the cooling mode according to the embodiment of the present invention;
fig. 6 is a partial flowchart of step S2 in the error detection method for the thermal bulb of the internal machine provided in the embodiment of the present application;
FIG. 7 is a graph showing the relationship between pressure and enthalpy values in the case where the air conditioner operates in the heating mode according to the embodiment of the present invention;
fig. 8 is a functional block diagram of an error detection device of an internal machine thermal bulb provided in the embodiment of the present application.
Description of reference numerals:
1-an evaporator; 2-a first bulb; 3-a second thermal bulb; 4-a third thermal bulb; 5-an expansion valve; 6-a controller; 10-a receiving module; and 20, controlling the module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The embodiment of the application provides an air conditioner which can be used for air conditioning of a designated area. The air conditioner at least comprises an inner machine, wherein the inner machine is provided with an evaporator 1, the evaporator 1 can be used for releasing cold or heat, and the air conditioner can be used for carrying out air conditioning on a specified area under the condition that the inner machine guides air flow to pass through the evaporator 1 and enter the specified area. In addition, referring to fig. 1, the inner unit is further provided with a first thermal bulb 2, a second thermal bulb 3, a third thermal bulb 4 and an expansion valve 5; the first thermal bulb 2 is arranged in an air pipe of an internal machine, and the air pipe can be regarded as an air pipe of the evaporator 1; the second bulb 3 is arranged on a liquid pipe of the inner machine, which can be regarded as a liquid pipe of the evaporator 1; the third thermal bulb 4 is arranged on the evaporator 1, wherein the third thermal bulb 4 is arranged on a coil of the evaporator 1; an expansion valve 5 is mounted on the liquid pipe, and the expansion valve 5 is located on the side of the second bulb 3 remote from the evaporator 1.
The air pipe of the internal machine indicates a duct communicating with the evaporator 1 and guiding the refrigerant in a gaseous state into or out of the evaporator 1; the liquid line of the internal machine represents a conduit which communicates with the evaporator 1 and which is used to guide the liquid refrigerant into and out of the evaporator 1.
In the prior art, errors may occur in the installation positions of the first bulb 2, the second bulb 3 and the third bulb 4, and it is difficult to check and correct the errors in the prior art.
In order to solve the above technical problem, the air conditioner provided in the embodiment of the present application may further include a controller 6, where the controller 6 is electrically connected to the first thermal bulb 2, the second thermal bulb 3, the third thermal bulb 4, and the expansion valve 5, and the controller 6 may receive a first temperature value detected and sent by the first thermal bulb 2, receive a second temperature value detected and sent by the second thermal bulb 3, receive a third temperature value detected and sent by the second thermal bulb 3, and detect a change condition of the opening degree of the expansion valve 5. Therefore, whether the first thermal bulb 2, the second thermal bulb 3 and the third thermal bulb 4 are installed wrongly or not is judged according to the information.
It will be appreciated that the configuration shown in fig. 2 is merely illustrative and that the air conditioner may include more or fewer components than shown in fig. 2 or may have a different configuration than shown in fig. 2. The components shown in fig. 2 may be implemented in hardware, software, or a combination thereof.
The controller 6 may be an integrated circuit chip having signal processing capability. The controller 6 may be a general-purpose processor, and may include a Central Processing Unit (CPU), a single chip Microcomputer (MCU), a Micro Controller Unit (MCU), a Complex Programmable Logic Device (CPLD), a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an embedded ARM, and other chips, where the controller 6 may implement or execute the methods, steps, and Logic blocks disclosed in the embodiments of the present invention.
In a possible implementation manner, the air conditioner may further include a memory for storing program instructions executable by the controller 6, for example, the air conditioner control device provided in the embodiment of the present application, where the air conditioner control device provided in the embodiment of the present application includes at least one of the program instructions stored in the memory in the form of software or firmware. The Memory may be a stand-alone external Memory including, but not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Read-Only Memory (EPROM), electrically Erasable Read-Only Memory (EEPROM). The memory may also be integrated with the controller 6, for example the memory may be integrated with the controller 6 in the same chip.
In order to improve the above technical problem, referring to fig. 3, an embodiment of the present application further provides an error detection method for an internal machine thermal bulb based on the air conditioner shown in fig. 1 and fig. 2. The error detection method for the inner machine temperature sensing bulb comprises the following steps:
step S1, receiving a first temperature value detected and sent by the first thermal bulb 2, a second temperature value detected and sent by the second thermal bulb 3, and a third temperature value detected and sent by the third thermal bulb 4.
The first temperature value is obtained by detecting the temperature value of the air pipe by the first temperature sensing bulb 2, and is sent to the controller 6 by the first temperature sensing bulb 2; the second temperature value is obtained by detecting the temperature value of the liquid pipe by the second temperature sensing bulb 3, and is sent to the controller 6 by the second temperature sensing bulb 3; the third temperature value is detected by the third thermal bulb 4 and is sent to the controller 6 by the third thermal bulb 4, wherein the temperature value is obtained by the coil of the evaporator 1.
And step S2, sending out a bulb error signal according to the magnitude relation of two of the first temperature value, the second temperature value and the third temperature value and the change condition of the opening degree of the expansion valve 5 in a period of continuous preset times.
It should be noted that, the accuracy of determining whether the first thermal bulb 2, the second thermal bulb 3, and the third thermal bulb 4 have installation errors is relatively low only by the first temperature value, the second temperature value, and the third temperature value, and because the fluctuation of the temperature may cause that the determination may have errors only by using the first temperature value, the second temperature value, and the third temperature value, the controller 6 may determine whether the first thermal bulb 2, the second thermal bulb 3, and the third thermal bulb 4 have installation errors simultaneously according to the opening degree variation condition of the expansion valve 5, which may improve the accuracy of detecting errors of the thermal bulbs, thereby improving the technical problem in the prior art that it is difficult to find out the installation errors of the thermal bulbs.
Alternatively, referring to fig. 4, step S2 may include:
and S211, under the condition that the internal machine runs in the refrigeration mode, calculating a difference value between the second temperature value and the third temperature value to obtain a first difference value.
It should be noted that, in the case where the operation mode of the internal machine is the cooling mode, and the installation positions of the first bulb 2, the second bulb 3, and the third bulb 4 are accurate, the temperature detected by the first bulb 2, the temperature detected by the second bulb 3, and the temperature detected by the third bulb 4 should satisfy a linear relationship as shown in fig. 5. In fig. 5, the ordinate represents the pressure value, the abscissa represents the enthalpy value, and the curve represents the enthalpy value-pressure correspondence curve; because the air pipe, the liquid pipe and the coil pipe of the evaporator 1 are communicated with each other, the pressure of the corresponding positions of the first thermal bulb 2, the second thermal bulb 3 and the third thermal bulb 4 is the same; the first thermal bulb 2, the second thermal bulb 3 and the third thermal bulb 4 are different in position, so that the corresponding enthalpy values of the three are different. In the figure, a point a represents a coordinate point of a corresponding relationship between pressure and enthalpy at a position corresponding to the first bulb 2, a point B represents a coordinate point of a corresponding relationship between pressure and enthalpy at a position corresponding to the second bulb 3, and a point C represents a coordinate point of a corresponding relationship between pressure and enthalpy at a position corresponding to the third bulb 4. In fig. 5, the area on the concave side of the curve indicates a gas-liquid two-phase area of the refrigerant, and in this area, when two points are at the same pressure, the temperatures of the two points corresponding to the two points are equal; it can be seen that the temperature detected by the second thermal bulb 3 and the temperature detected by the third thermal bulb 4 should be equal, that is, the second temperature value should be equal to the third temperature value, and the temperature detected by the first thermal bulb 2 should be greater than the temperature detected by the second thermal bulb 3 and greater than the temperature detected by the third thermal bulb 4, that is, the first temperature value should be greater than the second temperature value and the third temperature value.
In the case of the detection by the first, second and third bulbs 2, 3 and 4, the temperatures of the air tube, the liquid tube and the coil of the evaporator 1 fluctuate, in other words, in the actual case, the temperatures detected by the first, second and third bulbs 2, 3 and 4 fluctuate, and there may be a small difference between the second and third temperature values due to the detection errors of the first, second and third bulbs 2, 3 and 4.
In order to improve the error of the error detection method caused by the difference, step S212 determines whether the absolute value of the first difference is smaller than a first predetermined value.
It should be noted that the value range of the first preset value may be 0 to 2 ℃, and optionally, in the embodiment of the present application, the value of the first preset value may be 1 ℃; it should be understood that, in other embodiments, the value of the first preset value may also be 0.5 ℃, 1.5 ℃ or 2 ℃, etc.
By judging the magnitude relation between the first difference and the first preset value, the error of the error detection method caused by the error caused by temperature fluctuation can be improved.
Step S213, if not, a bulb error signal is sent out according to the condition that the opening degree of the expansion valve 5 is decreased in the cycle of the consecutive preset times.
If the result of determining whether the absolute value of the first difference is smaller than the first preset value is negative, it indicates that the difference between the second temperature value and the third temperature value is too large, and at this time, there may be a case where the second temperature value and the third temperature value are not equal. Of course, since the temperature is affected by the fluctuation of the entire system of the air conditioner, there may be a case where the judgment is erroneous. Therefore, the opening degree change condition of the expansion valve 5 is used for auxiliary judgment, and the judgment accuracy of the error detection method is improved.
In the case of the internal-combustion-engine-operation cooling mode, the opening degree of the expansion valve 5 is adjusted by the degree of superheat of the evaporator 1, which can be regarded as the difference between the gas pipe temperature and the liquid pipe temperature, that is, can be expressed as the difference between the first temperature value and the second temperature value. In the case where the degree of superheat of the evaporator 1 is lower than the preset temperature value, the opening degree of the expansion valve 5 will be decreased; in the case where the degree of superheat of the evaporator 1 is higher than the preset temperature value, the opening degree of the expansion valve 5 will increase. Therefore, under the condition that the opening degree of the expansion valve 5 is reduced in the period of continuous preset times, the superheat degree is smaller than the preset temperature value, so that the difference between the first temperature value and the second temperature value is smaller, the first temperature value and the second temperature value are not greatly different, the difference between the second temperature value and the third temperature value is larger, and the difference is contrary to the conclusion obtained in the graph 5, the error occurs in at least one installation position of the first temperature sensing bulb 2, the second temperature sensing bulb 3 and the third temperature sensing bulb 4, and at the moment, the controller 6 sends out a temperature sensing bulb error signal to prompt a user to maintain.
The manner of determining whether the expansion valve 5 decreases in the period of the consecutive preset times may be as follows: in a plurality of consecutive cycles, the case where the opening degree value of the expansion valve 5 gradually decreases may indicate that the expansion valve 5 decreases in the cycles of consecutive preset times. The change condition of the opening degree of the expansion valve 5 is judged by adopting a plurality of continuous periods, so that the judgment accuracy can be improved.
It should be understood that, in the case that the opening degree of the expansion valve 5 does not satisfy the decrease in the cycles of the consecutive preset times, the first temperature value, the second temperature value, and the third temperature value may be considered to be in the normal range, and the controller 6 may control the air conditioner to normally operate.
It should be noted that, in some embodiments of the present application, a value range of the preset temperature value may be 2 ℃ to 5 ℃, and optionally, a value of the preset temperature value may be 3 ℃; of course, in other embodiments, the preset temperature value may be 2 ℃, 4 ℃, or 5 ℃. In addition, the value range of the preset times can be 3-10 times, and optionally, the value of the preset times is 5 times; it should be understood that in other embodiments, the preset number may also be 4, 6, 7, 8, or 9, etc.
Optionally, the internal thermal bulb error detection method may further include:
step S214, if the result of determining whether the absolute value of the first difference is smaller than the first preset value is yes, comparing the first temperature value with the second temperature value.
When the absolute value of the first difference is smaller than the first preset value, it indicates that the difference between the second temperature value and the third temperature value is small, and the second temperature value and the third temperature value may be considered to meet the conclusion drawn in fig. 5. And then comparing the first temperature value with the second temperature value to improve the accuracy of the error detection method.
Step S215, if the first temperature value is less than or equal to the second temperature value, a bulb error signal is sent according to a condition that the opening degree of the expansion valve 5 is decreased in a period of consecutive preset times.
In the case where the first temperature value is less than or equal to the second temperature value, the result does not match the conclusion drawn in fig. 5, and similarly, in order to avoid an error caused by temperature shifting due to system fluctuation, the controller 6 performs an auxiliary judgment through the change condition of the opening degree of the expansion valve 5.
Optionally, the error detection method for the inner temperature sensing bulb may further include:
step S216, if the first temperature value is greater than the second temperature value, calculating a difference value obtained by subtracting the second temperature value from the first temperature value to obtain a second difference value.
In the case that the first temperature value is greater than the second temperature value, it indicates that the magnitude relationship between the first temperature value and the second temperature value conforms to the conclusion drawn in fig. 5. In order to avoid errors caused by temperature fluctuation, the detection precision can be improved by judging whether the difference value between the first temperature value and the second temperature value is within the error allowable range.
And step S217, comparing the second difference value with a second preset value.
Step S218, if the second difference is smaller than or equal to the second preset value, a bulb error signal is sent according to the condition that the opening degree of the expansion valve 5 is decreased in the period of the consecutive preset times.
When the second difference is smaller than or equal to the second preset value, it indicates that the difference between the first temperature value and the second temperature value is too small to reach the conclusion drawn in fig. 5, and therefore, the controller 6 may improve the determination accuracy through the opening degree change condition of the expansion valve 5.
It should be noted that the value range of the second preset value may be 2 ℃ to 5 ℃, and optionally, the value of the second preset value is 3 ℃; it should be understood that in other embodiments, the value of the second preset value may be 2 ℃, 4 ℃, or 5 ℃ or the like.
Optionally, the internal thermal bulb error detection method may further include:
step S219, if the second difference is greater than the second preset value, comparing the first temperature value with the third temperature value.
If the second difference is greater than the second preset value, it indicates that the difference between the first temperature value and the third temperature value meets the conclusion drawn in fig. 5. Therefore, a further comparison can be made to improve the accuracy of the error detection method.
Step S220, if the first temperature value is less than or equal to the third temperature value, a bulb error signal is sent according to the condition that the opening degree of the expansion valve 5 is decreased in the period of the consecutive preset times.
When the first temperature value is less than or equal to the third temperature value, it is indicated that the difference between the first temperature value and the second temperature value is too small to reach the conclusion obtained in fig. 5, and therefore, the controller 6 can improve the judgment accuracy through the opening degree change condition of the expansion valve 5.
Optionally, the internal thermal bulb error detection method may further include:
step S221, if the first temperature value is greater than the third temperature value, calculating a difference between the first temperature value and the third temperature value to obtain a third difference.
In the case that the first temperature value is greater than the third temperature value, it indicates that the magnitude relationship between the first temperature value and the third temperature value meets the conclusion drawn in fig. 5. In order to avoid errors caused by temperature fluctuation, the detection precision can be improved by judging whether the difference value between the first temperature value and the third temperature value is within the error allowable range.
And step S222, comparing the third difference value with a third preset value.
Step S223, if the third difference is smaller than or equal to the third preset value, a bulb error signal is sent according to the condition that the opening degree of the expansion valve 5 is decreased in the period of the consecutive preset times.
When the third difference is smaller than or equal to the third preset value, it indicates that the difference between the first temperature value and the third temperature value is too small to reach the conclusion drawn in fig. 5, and therefore, the controller 6 may improve the determination accuracy through the opening degree change condition of the expansion valve 5.
In order to improve the accuracy of the inner-machine bulb error detection method, after step S217, the inner-machine bulb error detection method may further include:
if the second difference is less than or equal to the second preset value and the opening degree of the expansion valve 5 does not meet the requirement of decreasing in the consecutive preset number of cycles, the step of comparing the first temperature value and the third temperature value is performed, which may be regarded as step S219.
As described above, the position detection and determination of the first bulb 2, the second bulb 3, and the third bulb 4 can be performed in the cooling mode of the internal machine operation. It can be accurately judged whether there is an installation error of the first bulb 2, the second bulb 3 and the third bulb 4. The technical problem that the mounting error of the temperature sensing bulb is difficult to check in the prior art is solved.
Optionally, referring to fig. 6, step S2 may further include:
and S231, if the operation mode of the internal machine is the heating mode, judging whether the third temperature value is greater than the second temperature value.
It should be noted that, in the case where the operation mode of the internal machine is the heating mode, and where the mounting positions of the first bulb 2, the second bulb 3, and the third bulb 4 are accurate, the temperature detected by the first bulb 2, the temperature detected by the second bulb 3, and the temperature detected by the third bulb 4 should satisfy a linear relationship as shown in fig. 7. In fig. 7, the ordinate represents the pressure value, the abscissa represents the enthalpy value, and the curve represents the enthalpy value and pressure corresponding curve; because the air pipe, the liquid pipe and the coil pipe of the evaporator 1 are communicated with each other, the pressure of the corresponding positions of the first thermal bulb 2, the second thermal bulb 3 and the third thermal bulb 4 is the same; the first thermal bulb 2, the second thermal bulb 3 and the third thermal bulb 4 are different in position, so that the corresponding enthalpy values of the three are different. In the figure, a point a represents a coordinate point of a corresponding relationship between pressure and enthalpy at a position corresponding to the first bulb 2, a point B represents a coordinate point of a corresponding relationship between pressure and enthalpy at a position corresponding to the second bulb 3, and a point C represents a coordinate point of a corresponding relationship between pressure and enthalpy at a position corresponding to the third bulb 4. In fig. 5, the area on the concave side of the curve indicates a gas-liquid two-phase area of the refrigerant, and in this area, when two points are at the same pressure, the temperatures of the two points corresponding to the two points are equal; it can be seen that the temperature detected by the first bulb 2 should be greater than the temperature detected by the third bulb 4, and the temperature detected by the third bulb 4 should be greater than the temperature detected by the second bulb 3; in other words, the first temperature value should be greater than the third temperature value, which should be greater than the second temperature value. And, in general, the first temperature value should be 15 ℃ greater than the third temperature value; the third temperature value should be 3 c greater than the second temperature value.
And step S232, if not, sending out a bulb error signal according to the change condition that the opening degree of the expansion valve 5 is reduced in the period of continuous preset times.
In other words, in the case where the result of determining whether the third temperature value is greater than the second temperature value is negative, which indicates that there may be an error in the installation between the third bulb 4 and the second bulb 3, in order to prevent a detection error due to temperature fluctuation caused by system fluctuation, the controller 6 may perform an auxiliary determination by the opening degree change condition of the expansion valve 5, thereby improving the determination accuracy.
It should be noted that, in the case of the internal combustion engine operation heating mode, the opening degree of the expansion valve 5 is adjusted by the supercooling degree of the evaporator 1, and the supercooling degree may be regarded as a difference between the temperature value detected by the third thermal bulb 4 and the temperature value detected by the second thermal bulb 3, that is, a difference between the third temperature value and the second temperature value. Under the condition that the supercooling degree of the evaporator 1 is lower than a preset temperature value, the opening degree of the expansion valve 5 is reduced; and when the supercooling degree is higher than the preset temperature value, the opening degree of the expansion valve 5 is increased. Therefore, under the condition that the opening degree of the expansion valve 5 is reduced in the period of continuous preset times, the supercooling degree is smaller than the preset temperature value, so that the difference between the third temperature value and the second temperature value is smaller, the difference between the third temperature value and the second temperature value can be obtained, and the difference is contrary to the conclusion obtained in fig. 7, the error is shown in at least one installation position of the first temperature sensing bulb 2, the second temperature sensing bulb 3 and the third temperature sensing bulb 4, and at the moment, the controller 6 sends out a temperature sensing bulb error signal to prompt a user to maintain.
In step S233, if the result of determining whether the third temperature value is greater than the second temperature value is yes, a difference between the third temperature value and the second temperature value is calculated to obtain a fourth difference.
In other words, in the case that the result of determining whether the third temperature value is greater than the second temperature value is yes, the third temperature value is greater than the second temperature value, which is in accordance with the conclusion drawn in fig. 7. Further detection determination may be made by calculating a difference between the third temperature value and the second temperature value to improve detection accuracy.
Step S234, determine whether the fourth difference is greater than the fourth preset value and less than the fifth preset value.
It should be noted that the fourth preset value may be 3 ℃, and in order to avoid the influence of the error caused by the temperature fluctuation on the detection, the value range of the fourth preset value may be 2 ℃ to 5 ℃, in other words, the value of the fourth preset value may also be 2 ℃, 4 ℃, or 5 ℃, and the like. The value of the fifth preset value can be 15 ℃, and in order to avoid the influence of errors caused by temperature fluctuation on detection, the value range of the fifth preset value can be 10-20 ℃; in other words, the value of the fifth preset value can also be 12 ℃, 14 ℃, 16 ℃, 18 ℃ or 20 ℃ and the like.
And step S235, if not, sending out a bulb error signal according to the change condition that the opening degree of the expansion valve 5 is reduced in the period of continuous preset times.
And under the condition that the result of judging whether the fourth difference value is greater than the fourth preset value and smaller than the fifth preset value is negative, the difference value between the third temperature value and the second temperature value does not reach 3 ℃, and the conclusion that the magnitude relation between the third temperature value and the second temperature value does not reach the figure 7 is shown, so that an error condition may exist. Therefore, the controller 6 can accurately judge the opening degree change condition of the expansion valve 5, and the accuracy of the error detection method of the inner machine temperature bulb is improved.
Optionally, the internal thermal bulb error detection method may further include:
step S236, if the result of determining whether the fourth difference is greater than the fourth preset value and less than the fifth preset value is yes, calculating a difference between the first temperature value and the third temperature value to obtain a fifth difference.
And under the condition that the fourth difference value is greater than the fourth preset value and less than the fifth preset value, the magnitude relation between the third temperature value and the second temperature value is shown to be in accordance with the conclusion drawn in fig. 7. Therefore, the error detection method of the inner machine temperature bulb is carried out continuously by comparing the magnitude relation of the first temperature value and the third temperature value, and the detection accuracy is improved.
And step S237, judging whether the fifth difference value is larger than a sixth preset value.
It should be noted that the value of the sixth preset value may be 15 ℃, and certainly, in order to avoid detection errors caused by temperature fluctuation, the value range of the sixth preset value may be 10 ℃ to 20 ℃; in other words, the value of the sixth preset value can also be 12 ℃, 14 ℃, 16 ℃, 18 ℃ or 20 ℃ and the like.
Optionally, in some embodiments, the sixth preset value may be equal to the fifth preset value.
If the result of determining whether the fifth difference is greater than the sixth preset value is yes, it indicates that the difference between the first temperature value and the third temperature value meets the conclusion obtained in fig. 7, and indicates that the installation positions of the first thermal bulb 2, the second thermal bulb 3, and the third thermal bulb 4 are normal, and the controller 6 may control the air conditioner to operate normally.
Step S238, if not, calculating a difference between the first temperature value and the second temperature value to obtain a sixth difference.
That is, if the result of determining whether the fifth difference is greater than the sixth preset value is negative, an error may exist between the first temperature value and the second temperature value. In order to avoid detection errors caused by temperature fluctuation, further judgment can be carried out through the difference value of the first temperature value and the second temperature value, and therefore accuracy is improved.
And step 239, judging whether the sixth difference is larger than a sixth preset value.
Step S240, if the result of determining whether the sixth difference is greater than the sixth preset value is negative, sending a thermal bulb error signal.
And under the condition that the result of judging whether the sixth difference value is greater than the sixth preset value is negative, the sixth difference value is smaller than or equal to the sixth preset value, and meanwhile, under the condition that the fifth difference value is smaller than or equal to the sixth preset value, the first temperature value is wrong, namely the mounting position of the first temperature-sensing bulb 2 is wrong. Thus, the controller 6 issues a bulb error signal to prompt the user for maintenance.
In addition, in case that the result of judging whether the sixth difference is greater than the sixth preset value is yes, the controller 6 controls the air conditioner to normally operate.
Before step S235, the internal thermal bulb error detection method may further include:
if the result of judging whether the fourth difference value is larger than the fourth preset value and smaller than the fifth preset value is negative and the opening degree of the expansion valve 5 does not meet the requirement of reduction in the period of continuous preset times, executing the step of calculating the difference value of the first temperature value minus the third temperature value to obtain a fifth difference value; it is of course also possible to consider performing step S236.
As described above, the position detection and determination of the first bulb 2, the second bulb 3, and the third bulb 4 can be performed in the internal combustion engine heating mode. It can be accurately judged whether there is an installation error of the first bulb 2, the second bulb 3 and the third bulb 4. The technical problem that the mounting error of the temperature sensing bulb is difficult to check in the prior art is solved.
To sum up, the error detection method for the inner machine temperature sensing bulb provided in the embodiment of the present application can be implemented as follows: no matter a user firstly operates the refrigerating mode or the heating mode, whether the installation positions of the first thermal bulb 2, the second thermal bulb 3 and the third thermal bulb 4 have errors or not can be detected through the internal machine thermal bulb error detection method, meanwhile, the accuracy of the internal machine thermal bulb error detection method can be ensured, and the technical problem that the installation errors of the thermal bulbs are difficult to check in the prior art is solved.
In order to execute possible steps of the error detection method for the internal thermal bulb provided in the foregoing embodiments, please refer to fig. 8, and fig. 8 illustrates a functional module schematic diagram of an error detection apparatus for an internal thermal bulb according to an embodiment of the present application. The inner machine temperature sensing bulb error detection device is applied to an air conditioner, and the inner machine temperature sensing bulb error detection device provided by the embodiment of the application is used for executing the inner machine temperature sensing bulb error detection method. It should be noted that the basic principle and the generated technical effect of the error detection device for the thermal bulb of the internal machine provided by the embodiment are substantially the same as those of the above embodiment, and for the sake of brief description, no part of the present embodiment is mentioned, and reference may be made to the corresponding contents in the above embodiment.
The internal thermal bulb error detection apparatus may include a receiving module 10 and a control module 20.
The receiving module 10 is used for receiving a first temperature value detected and sent by the first thermal bulb 2, a second temperature value detected and sent by the second thermal bulb 3, and a third temperature value detected and sent by the third thermal bulb 4.
The first temperature sensing bulb 2 is used for being installed on an air pipe of the indoor unit, the second temperature sensing bulb 3 is used for being installed on a liquid pipe of the indoor unit, the third temperature sensing bulb 4 is used for being installed on the evaporator 1, the indoor unit further comprises an expansion valve 5, and the expansion valve 5 is arranged on the liquid pipe and located on one side, far away from the evaporator 1, of the second temperature sensing bulb 3.
Optionally, the receiving module 10 may be configured to execute step S1 in each of the above-mentioned figures to achieve a corresponding technical effect.
The control module 20 is configured to send a bulb error signal according to a magnitude relationship between two of the first temperature value, the second temperature value, and the third temperature value and a change condition of the opening degree of the expansion valve 5 in a period of consecutive preset times.
Alternatively, the control module 20 may be configured to execute step S2 in the above-mentioned respective figures to achieve the corresponding technical effect.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In other words, the present application also provides a computer-readable storage medium on which a computer program is stored, which, when executed by a processor, implements the internal thermal bulb error detection method described above. For example, the computer-readable storage medium may be a usb disk storing a computer program, and in the case where the air conditioner needs to perform the error detection of the installation positions of the first thermal bulb 2, the second thermal bulb 3, and the third thermal bulb 4, the usb disk is electrically connected to a processor in the air conditioner, so that the processor can read the computer program in the usb disk, and in the case where the processor reads the computer program in the usb disk, the aforementioned internal thermal bulb error detection method can be performed.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. The utility model provides an interior machine temperature sensing package error detection method for whether the mounted position of first temperature sensing package, second temperature sensing package and third temperature sensing package of detection installation in the interior machine is wrong, first temperature sensing package is used for installing the trachea of interior machine, second temperature sensing package is used for installing the liquid pipe of interior machine, third temperature sensing package is used for installing at the evaporimeter, the interior machine still includes the expansion valve, the expansion valve sets up and is located on the liquid pipe second temperature sensing package is kept away from one side of evaporimeter, its characterized in that, interior machine temperature sensing package error detection method includes:
receiving a first temperature value detected and sent by the first temperature sensing bulb, a second temperature value detected and sent by the second temperature sensing bulb and a third temperature value detected and sent by the third temperature sensing bulb;
and sending out a thermal bulb error signal according to the magnitude relation of two of the first temperature value, the second temperature value and the third temperature value and the change condition of the opening degree of the expansion valve in a period of continuous preset times.
2. The error detection method for the internal machine thermal bulb according to claim 1, wherein the step of sending out the thermal bulb error signal according to the magnitude relationship between two of the first temperature value, the second temperature value and the third temperature value and the change condition of the opening degree of the expansion valve in the period of continuing the preset times comprises:
under the condition that the internal machine operates in the refrigeration mode, calculating a difference value between the second temperature value and the third temperature value to obtain a first difference value;
judging whether the absolute value of the first difference is smaller than a first preset value or not;
and if not, sending out the error signal of the temperature sensing bulb according to the condition that the opening degree of the expansion valve is reduced in the period of continuously presetting the times.
3. The internal machine thermal bulb error detection method according to claim 2, further comprising:
if the result of judging whether the absolute value of the first difference is smaller than the first preset value is yes, comparing a first temperature value with a second temperature value;
and if the first temperature value is less than or equal to the second temperature value, sending out a thermal bulb error signal according to the condition that the opening degree of the expansion valve is reduced in the period of continuous preset times.
4. The internal machine thermal bulb error detection method according to claim 3, further comprising:
if the first temperature value is greater than the second temperature value, calculating a difference value of the first temperature value minus the second temperature value to obtain a second difference value;
comparing the second difference value with a second preset value;
and if the second difference is smaller than or equal to the second preset value, sending out the temperature sensing bulb error signal according to the condition that the opening degree of the expansion valve is reduced in the period of continuous preset times.
5. The internal machine thermal bulb error detection method according to claim 4, further comprising:
if the second difference value is larger than the second preset value, comparing the first temperature value with the third temperature value;
and if the first temperature value is less than or equal to the third temperature value, sending out a thermal bulb error signal according to the condition that the opening degree of the expansion valve is reduced in the period of continuous preset times.
6. The internal machine thermal bulb error detection method according to claim 5, further comprising:
if the first temperature value is greater than the third temperature value, calculating a difference value of the first temperature value minus the third temperature value to obtain a third difference value;
comparing the third difference value with a third preset value;
and if the third difference is smaller than or equal to the third preset value, sending out the temperature sensing bulb error signal according to the condition that the opening degree of the expansion valve is reduced in the period of continuous preset times.
7. The internal machine thermal bulb error detection method according to claim 5, further comprising:
and if the second difference is smaller than or equal to the second preset value and the opening degree of the expansion valve does not meet the requirement of decreasing in the period of continuing the preset times, executing the step of comparing the first temperature value and the third temperature value.
8. The error detection method for the internal machine thermal bulb according to claim 1, wherein the step of sending out the thermal bulb error signal according to the magnitude relationship between two of the first temperature value, the second temperature value and the third temperature value and the change condition of the opening degree of the expansion valve in the period of continuing the preset times comprises:
if the operation mode of the internal machine is a heating mode, judging whether the third temperature value is greater than the second temperature value;
and if not, sending out the error signal of the temperature sensing bulb according to the change condition that the opening degree of the expansion valve is reduced in the period of continuously presetting the times.
9. The internal machine bulb error detection method according to claim 8, further comprising:
if the result of judging whether the third temperature value is greater than the second temperature value is yes, calculating a difference value of the third temperature value minus the second temperature value to obtain a fourth difference value;
judging whether the fourth difference value is larger than a fourth preset value and smaller than a fifth preset value, wherein the fourth preset value is smaller than the fifth preset value;
and if not, sending out the error signal of the temperature sensing bulb according to the change condition that the opening degree of the expansion valve is reduced in the period of continuously presetting the times.
10. The internal machine bulb error detection method according to claim 9, further comprising:
if the result of judging whether the fourth difference value is larger than a fourth preset value and smaller than a fifth preset value is yes, calculating a difference value of subtracting the third temperature value from the first temperature value to obtain a fifth difference value;
judging whether the fifth difference value is larger than a sixth preset value or not;
if not, calculating a difference value obtained by subtracting the second temperature value from the first temperature value to obtain a sixth difference value;
judging whether the sixth difference value is larger than the sixth preset value;
and if the result of judging whether the sixth difference value is larger than the sixth preset value is negative, sending a temperature sensing bulb error signal.
11. The internal machine bulb error detection method according to claim 10, further comprising:
and if the result of judging whether the fourth difference value is larger than a fourth preset value and smaller than a fifth preset value is negative and the opening degree of the expansion valve does not meet the requirement of reduction in the period of continuous preset times, executing the step of calculating the difference value of subtracting the third temperature value from the first temperature value to obtain a fifth difference value.
12. An internal machine thermal bulb error detection device, comprising:
the receiving module is used for receiving a first temperature value detected and sent by the first temperature sensing bulb, a second temperature value detected and sent by the second temperature sensing bulb and a third temperature value detected and sent by the third temperature sensing bulb; the first temperature sensing bulb is used for being installed on an air pipe of the indoor unit, the second temperature sensing bulb is used for being installed on a liquid pipe of the indoor unit, the third temperature sensing bulb is used for being installed on an evaporator, and the expansion valve is arranged on the liquid pipe and located on one side, far away from the evaporator, of the second temperature sensing bulb;
and the control module is used for sending out a thermal bulb error signal according to the size relationship of two of the first temperature value, the second temperature value and the third temperature value and the change condition of the opening degree of the expansion valve in a period of continuous preset times.
13. The air conditioner is characterized by comprising an inner machine and a controller, wherein a first temperature sensing bulb, a second temperature sensing bulb, a third temperature sensing bulb, an evaporator and an expansion valve are arranged in the inner machine; the first temperature sensing bulb is installed on an air pipe of the inner machine, the second temperature sensing bulb is installed on a liquid pipe of the inner machine, the third temperature sensing bulb is installed on the evaporator, and the expansion valve is arranged on the liquid pipe and located on one side, far away from the evaporator, of the second temperature sensing bulb; the first thermal bulb, the second thermal bulb, the third thermal bulb and the expansion valve are all electrically connected with the controller, and the controller is used for executing the error detection method of the internal machine thermal bulb according to any one of claims 1 to 11.
14. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the internal machine thermal bulb error detection method according to any one of claims 1 to 11.
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| CN113654221A (en) * | 2021-08-06 | 2021-11-16 | 美的集团武汉制冷设备有限公司 | Control method of air conditioner, air conditioner and computer readable storage medium |
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