JP2754959B2 - Air conditioner sensor identification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor discriminating apparatus for discriminating whether a plurality of sensors installed in an air conditioner are mounted at a predetermined mounting position.

[0002]

2. Description of the Related Art FIG.
No. 1 is an indoor unit, 1a is an operation switch, 1b is a microcomputer, 1c and 1d are sensor input circuits, 1e and 1f are sensor input terminals, and 2 is The outdoor unit 3 is an outdoor heat exchanger, 4 is a pipe temperature detection sensor, and 5 is an outside air temperature detection sensor.

Next, the operation will be described. When the air conditioner is operated by the operation switch 1a, the temperature measurement data detected by the pipe temperature detection sensor 4 is transmitted to the sensor input terminal 1
e and the sensor input circuit 1c input to the microcomputer 1b, and the temperature measurement data detected by the outside air temperature detection sensor 5 is input to the microcomputer 1b through the sensor input terminal 1f and the sensor input circuit 1d. For a certain period of time after the start of operation, the microcomputer 1b measures the change temperature of the temperature data of the pipe temperature detection sensor 4 and the outside air temperature detection sensor 5, and after a certain period of time, considers the sensor with the larger change temperature as the pipe temperature detection sensor. Identify.

[0004]

Since the conventional air conditioner sensor identification device is constructed as described above, if a plurality of pipe temperature detection sensors are installed in the refrigeration cycle system, Depending on the operating condition of the air conditioner, if the change temperature of multiple pipe temperature detection sensors is the same, or if they temporarily reverse due to detection accuracy, the sensors can be identified accurately. In addition to the problem of no recognition, there is a problem that it takes a long time for identification.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a sensor identification device capable of accurately and quickly identifying a sensor even when a plurality of pipe temperature detection sensors are installed. It is an object.

[0006]

SUMMARY OF THE INVENTION An air conditioner sensor identification device according to the present invention is an air conditioner having a temperature detection sensor for detecting a temperature of a predetermined portion of a refrigeration cycle of an air conditioner, and an outside air temperature detection sensor. In the sensor identification device of the harmony machine, a storage means for storing in advance the order of changes in the temperature detected by the temperature detection sensor and the outside air temperature detection sensor immediately after the start of operation, and the temperature detection sensor and the outside air temperature immediately after the actual start of operation. Detecting means for detecting the order in which the temperature detected by the detection sensor changes by a predetermined value or more; and comparing means for comparing the order in which the temperature of the sensor stored in the storage means changes with the order detected by the detecting means. Prepare.

[0007]

In the air conditioner sensor identification device according to the present invention, the temperature of the air conditioner sequentially changes along the route in which the refrigerant circulates immediately after the operation of the air conditioner is started. The order in which the temperatures detected by the temperature detection sensor and the outside air temperature detection sensor change by a predetermined value or more immediately after the start of the actual operation is detected, and the order in which the stored sensor temperature changes and the detected order are compared. To determine if the sensor mounting position is set correctly.

[0008]

【Example】

Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is an indoor unit having an indoor heat exchanger 11, 2 is an outdoor unit having a microcomputer 1b and a sensor input circuit 1c, 3 is an outdoor heat exchanger provided in the outdoor unit 2,
Reference numeral 5 denotes an outside air temperature detection sensor provided in the outdoor unit 2 for detecting an outside air temperature, 6 denotes a condensation temperature detection sensor provided in the outdoor heat exchanger 3 and detects a condensation temperature of a refrigerant, and 7 denotes a decompression device 1.
A supercooling temperature detection sensor for detecting the temperature of the refrigerant pipe 12 just before 0; a compressor 8 for compressing the refrigerant to discharge a high-temperature, high-pressure gas; 9 a four-way valve for switching the flow of the refrigerant;
Is an external display device for displaying whether a sensor such as an LED is mounted at a predetermined mounting position.

Next, the operation will be described. When the air conditioner is operated, the refrigerant compressed by the compressor 8 during the cooling operation becomes a high-temperature and high-pressure gas through the refrigerant pipe 12, the four-way valve 9, the outdoor heat exchanger 3, the pressure reducing device 10, and the indoor heat exchanger. 1
1 is sequentially circulated to form a refrigeration cycle. Further, the condensation temperature detection sensor 6 detects the condensation temperature of the outdoor heat exchanger 3,
The supercooling temperature detection sensor 7 detects the pipe temperature before the pressure reducing device 10, calculates the degree of supercooling by the microcomputer 1 b from the temperature difference from the temperature detected by the condensation temperature detecting sensor 6, and determines the opening of the pressure reducing device 10. I do. FIG. 2 shows a change over time of the detected temperature detected by each sensor after the operation of the air conditioner. While the operation of the air conditioner is stopped, the refrigerant pipe of the refrigeration cycle system has substantially the same temperature, but immediately after the start, the temperature of the refrigerant pipe changes in a time period of msec unit due to a pipe path in which the refrigerant circulates. I do. Now, the detected temperature of the condensation temperature detecting sensor 6 is TH1, and the detected temperature of the supercooling temperature detecting sensor 7 is TH.
2. Assuming that the detection temperature of the outside air temperature detection sensor 5 is TH3, the detection temperature TH1 of the condensation temperature detection sensor 6 located closest to the compressor 8 first rises as shown in FIG. The detection temperature TH2 of the supercooling temperature detection sensor 7
Begins to rise. Further, the detected temperature TH3 of the outside air temperature detecting sensor 5 does not change even when the compressor 8 starts operating.
Therefore, the microcomputer 1b stores in advance the order in which the temperature change occurs when each sensor is normally mounted. Next, when the air conditioner is actually operated, the temperature of each sensor becomes constant temperature Δt.
By detecting the order of change (for example, 2 deg) or more and comparing it with the order stored in the microcomputer 1b, the sensor mounting position can be identified and determined.

Next, the operation sequence will be described with reference to FIGS. FIG. 3 is a software flowchart of the sensor identification device of the air conditioner according to one embodiment of the present invention, and FIG. 4 is a detailed view of a part of FIG. Assuming that the order in which the sensors detect a change equal to or higher than the predetermined temperature Δt is S, when the sensors are normally mounted, the value of S in the condensation temperature detection sensor 6 is S = 1, and the supercooling temperature detection sensor 7 Is stored in the microcomputer 1b in advance as S = 2 and S = 3 of the outside air temperature detecting sensor 5 as S = 3. Operation ON (Step 20)
Then, each sensor starts detection, and the initial detection temperature of each sensor (or the average value after several measurements) may be used as the detection temperature T1 of the condensation temperature detection sensor 6, the detection temperature T2 of the supercooling temperature detection sensor 7, and the outside air temperature, respectively. Detection temperature T3 of detection precision sensor 5
And this is stored in the microcomputer 1b. Here, as an abbreviation for describing the flowchart of FIG. 3, the condensation temperature detection sensor 6 is × 1, the supercooling temperature detection sensor 7 is × 2, and the outside air temperature detection sensor 5 is × 3. Further, if the temperature TH1 of the condensing temperature detecting sensor 6 is TH1 ≧ T1 + 2 (step 23) based on the detected temperatures of the respective sensors after the compressor is turned on (step 22), the condensing temperature detecting sensor 6 (× 1) S
Is set to S = 1 (step 24). Where TH1 <
In the case of T1 + 2, the temperature TH of the subcooling temperature detection sensor
If TH2 ≧ T2 + 2 (step 25), the value of S of the supercooling temperature detection sensor 7 (× 2) is set to S = 1 (step 32). Further, at this time, if TH2 <T2 + 2, the temperature TH3 of the outside air temperature detection sensor 5 becomes TH3 ≧ T
If it is 3 + 2, the value of S of the outside air temperature detection sensor 5 (× 3) is set to S = 1 (step 40). At this time, TH3 <T
In the case of 3 + 2, the process returns to the determination part (step 23) of the temperature detection result of TH1 and repeats the above process. When the value of S of a certain sensor is determined, the next 2
The temperature changes of the two sensors are detected and the values of S = 2 and S = 3 are determined. For example, if the value of S of the condensation temperature detection sensor 6 is determined to be S = 1, then a temperature change of TH2 is detected (step 26). The value of S is set to S = 2 (step 2
7) The value of S of the outside air temperature detection sensor 5 (× 3) is S = 3
Is determined (step 28). As described above, the temperature change detection patterns of each sensor are classified into six types as shown in FIG. Since the value of S in the normal state is previously determined, the mounting position of the sensor can be identified based on the value of S registered in each sensor. For example, it can be understood that the pattern 1 is normal, and the pattern 2 is reverse mounting of the subcooling temperature detection sensor 7 and the outside air temperature detection sensor 5. Thus, by displaying the data subjected to the program processing on the external display device (for example, LED) 13, it is possible to easily determine whether the sensor is mounted at a predetermined mounting position.

[0011]

As described above, according to the present invention, a sensor identification device for an air conditioner including a temperature detection sensor for detecting the temperature of a predetermined portion of a refrigeration cycle of an air conditioner and an outside air temperature detection sensor. Storage means for storing in advance the order of changes in the temperatures detected by the temperature detection sensor and the outside air temperature detection sensor immediately after the start of operation, and the temperatures detected by the temperature detection sensor and the outside air temperature detection sensor immediately after the start of the actual operation. Detecting means for detecting the order in which the value changes by a predetermined value or more,
A configuration is provided that includes a comparison unit that compares the order in which the temperature of the sensor stored in the storage unit changes and the order that the detection unit detects, so that the mounting position of the temperature detection sensor and the outside air temperature detection sensor can be identified. Can be performed accurately in a short time.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a sensor identification device of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a diagram showing a time change of a temperature detected by each sensor after the air conditioner operation of the air conditioner sensor identification device according to the embodiment of the present invention is started.

FIG. 3 is a flowchart showing an operation of the sensor identification device of the air conditioner according to one embodiment of the present invention.

FIG. 4 is a partially detailed flowchart showing the operation of the sensor identification device of the air conditioner according to one embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional sensor identification device of an air conditioner.

[Explanation of symbols]

 1b microcomputer 4 pipe temperature detection sensor 5 outside air temperature detection sensor 6 condensation temperature detection sensor 7 supercooling temperature detection sensor

Claims (1)

(57) [Claims] 1. An air conditioner sensor identification device comprising: a temperature detection sensor for detecting a temperature of a predetermined portion of a refrigeration cycle of an air conditioner; and an outside air temperature detection sensor. Storage means for storing the order of change of the temperature detected by the sensor immediately after the start of operation,
Detecting means for detecting the order in which the temperatures detected by the temperature detection sensor and the outside air temperature detection sensor change by a predetermined value or more immediately after the start of actual operation; and the order in which the temperatures of the sensors stored in the storage means change and the detection And a comparison means for comparing the order detected by the means with the sensor identification device of the air conditioner.