JP2001066025A - Method and apparatus for specifying detection point of sensors provided in refrigerating/air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the work for specifying the detecting point of sensors in a refrigerating/air conditioning system efficiently while saving labor. SOLUTION: Under operating state of a refrigerating system (S102), detection values of a plurality of sensors provided at respective parts of the refrigerating system are read out. The maximum value in pressure data is set as a high pressure (S106), the minimum value is set as a low pressure (S107) and the intermediate value is set as a hydraulic pressure (S108). The maximum value in temperature data is set as the delivery gas temperature of a compressor (S109) and the minimum value is set as the suction gas temperature of the compressor (S110). A value in the residual temperature data having a minimum variation is set as the outdoor air temperature (S111). A value falling in a range of condensation temperature tk to tk-10 deg.C is set as the refrigerant liquid temperature (S113). The maximum value of temperature data in two remaining terms is set as the crank room temperature and the minimum value is set as the motor frame temperature (S114). According to the method, conventional visual work for specifying the detecting point can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for specifying the detection points of various sensors installed to detect the operating state of a refrigeration / air-conditioning apparatus.

[0002]

2. Description of the Related Art In a refrigeration system or an air conditioner, when operating data such as temperature and pressure are measured or accumulated for a long period of time, a temperature sensor and a pressure sensor are installed at each part to be measured, and these are fixed. 2. Description of the Related Art A method of continuously measuring and accumulating operation data by connecting to a type of measurement device or monitoring device has been widely performed. Further, a method of receiving measured operation data from a remote monitoring center or the like via a communication line to remotely monitor the operation state of the refrigeration / air-conditioning apparatus has been attempted. In such measurement, for the purpose of facilitating the reading and analysis of the driving data manually or automatically, for example, if the pressure is “high pressure”
"Low pressure" or "Crankcase temperature" if temperature
A name corresponding to each detection point and the type of detection data is assigned to each sensor, such as “refrigerant liquid temperature” and “outside air temperature”. In this name, European characters and numerals, and various codes may be used.

By the way, when a refrigeration / air-conditioning device is newly installed or a measuring device / monitoring device is added to an existing refrigeration / air-conditioning device, as an initial setting operation, a sensor installed at each detection point is used. It is necessary to specify each detection point and assign a name corresponding to the specified detection point to each sensor.

This work is conventionally performed manually. For each of a large number of sensors, wiring of the same color is traced from a detection point where each sensor is installed, and a connector having a different shape according to the type of detection data. Using, for example, the detection point of each sensor is specified on the measurement / monitoring device side of the sensor wiring, and the specified wiring of each sensor is connected to a predetermined input port of the measurement device / monitoring device. The operator assigns a name to each sensor by inputting the name of the sensor corresponding to the condition to the measuring device or the monitoring device using an appropriate input device such as a keyboard.

[0005]

However, such an operation of manually assigning sensor names is complicated. Particularly, when a large number of detection points are involved, the detection points of the respective sensors are detected on the wiring measuring device / monitoring device side. A large amount of labor and work time are required for the operation of identifying the information, and a means for improving the efficiency and labor is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide means for efficiently and labor-saving the operation of specifying a detection point of a sensor.

[0007]

According to a first aspect of the present invention, there is provided a method for identifying a detection point of a sensor, comprising: a first step of operating a refrigeration / air-conditioning apparatus provided with a plurality of sensors; A second step of individually reading detection values of the plurality of sensors, and a third step of specifying a detection point at which the sensor is installed from characteristics of the read detection values. I do.

In the first invention, while operating the refrigeration / air-conditioning apparatus, the detection values of a plurality of sensors installed in the refrigeration / air-conditioning apparatus are individually read, and based on the characteristics of the read detection values,
Identify the detection point where the sensor is installed. Therefore, it is possible to omit complicated work such as tracing the same color wiring from the detection point for each sensor, and to detect the detection points of each sensor on the sensor wiring measurement device / monitoring device side even when there are many installation sites. The specific work can be performed extremely efficiently and labor-saving.

The characteristics used for specifying the detected value are as follows:
The order of the detection values may be the same as in the second invention, or may be a predetermined range of the detection values as in the third invention.

According to a fourth aspect of the present invention, there is provided a device for specifying a detection point of a sensor installed in a refrigeration / air-conditioning apparatus, wherein a storage means for storing a known characteristic corresponding to a characteristic of a detection value of the sensor; A detection point specifying device, comprising: comparison means for comparing a detection value of a sensor with the known characteristic; and specification means for specifying a detection point of the sensor based on a comparison result.

In the fourth aspect, when the detected values of the plurality of sensors are read during the operation of the refrigeration / air-conditioning apparatus, the comparing means compares the detected values with the known characteristics stored in the storage means. . On the basis of the comparison result, the specifying means specifies the detection point of the sensor. Therefore, by using the fourth invention during the operation of the refrigeration / air-conditioning apparatus, the same effect as in the first invention can be obtained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. In FIG. 1, a refrigeration apparatus 20 for implementing the present invention includes a compressor 1, a condenser 2,
The expansion valve 3 and the evaporator 4 are connected in a ring shape by a refrigerant pipe 15, and the refrigerant pipe 15 has a known configuration in which a refrigerant is sealed.

A sensor 5 for detecting high pressure and a sensor 6 for detecting low pressure are provided on the refrigerant pipe 15 on the discharge side of the compressor 1 and on the suction side, respectively. In the compressor 1, a sensor 7 for detecting the pressure of the driving oil pressure is provided in a hydraulic circuit (not shown).

The compressor 1 is further provided with a sensor 8 for detecting a discharge gas temperature and a sensor 9 for detecting a suction gas temperature in the refrigerant pipe 15. A sensor 10 for detecting a temperature of the crankcase is provided in a crankcase (not shown) of the compressor 1, and a sensor 11 for detecting a temperature of the motor frame is provided in a motor frame (not shown) of the compressor 1. ing. On the other hand, a sensor 12 for detecting a refrigerant liquid temperature is provided in the refrigerant pipe 15 on the discharge side of the condenser 2. Also, at an appropriate place outside the circulation path of the refrigerant pipe 15,
A sensor 13 for detecting an outside air temperature is provided.

FIG. 2 shows a measuring device 30 for specifying the detection points of the sensors 5 to 13 and assigning names. In the figure, the measuring device 30 of the sensor 5 or 13 is shown.
Each connector on the side is electrically connected to receptacles 32 and 34 provided in the measuring device 30. In the present embodiment, the connectors of the sensors 5 to 7 for detecting pressure are connected to the receptacle 32, and the connectors of the sensors 8 to 13 for detecting temperature are connected to the receptacle 34. Further, sensors 5 to 7 for pressure detection
The wirings of different colors are used for the sensors 8 to 13 for temperature detection.

The control unit 22 includes a CPU, a ROM for storing operation programs, various set values, and the like;
2 and 34, and an input / output interface (not shown).

The display unit 24 includes an LCD or the like, and detects the detected values of the sensors 5 to 13 and the refrigerating apparatus 20 based on these or other detected values.
Various information such as the operating state of the vehicle is displayed according to the control from the control unit 22 or in response to an operation input by an operator.

The memory 26 stores operation data and a CPU.
And a RAM used for various operations according to the present invention. The refrigeration apparatus 20 of this embodiment is configured so that the detection values of the sensors 5 to 13 are stored in the RAM as described later.

The operation unit 28 includes buttons and slide switches (not shown). In addition to basic operation inputs such as power on / off, a memory 26 for various detected values is provided.
It is configured such that the operator can instruct and input desired operation contents, such as calling / displaying and correcting from the user, or according to various menus displayed on the display unit 24.

The control unit 22 is electrically connected to the compressor 1 described above, and in accordance with various set values stored in the ROM, in accordance with the detection values of the sensors 5 to 13 and the operation input of the operator. Thus, the compressor 1 is configured to operate / stop.

Next, the operation of the embodiment of the present invention will be described. FIG. 3 is a flowchart illustrating an initial setting process in the refrigeration apparatus 20 according to the embodiment of the present invention. In this process, first, as the initial values of the temperature data and the pressure data, the temperature data T _A1 to T _An and the pressure data P when the operation of the refrigerating / air-conditioning equipment is stopped are obtained from the sensors 5 to 13 as initial values.
_A1 to P _An are read (S101). At this stage, it is only known whether the sensors 5 to 13 are temperature data or pressure data, and it is unknown from the control unit 22 which detection point each is.

Next, the control section 22 outputs a predetermined start-up output to the compressor 1 to start the operation of the refrigeration apparatus 20 (S
102). As a result, temperature fluctuations and pressure fluctuations occur in the refrigerant in the refrigerant pipe 15 as is well known, and the high-temperature and high-pressure gaseous refrigerant compressed in the compressor 1 is cooled at the outside temperature in the condenser 2 and condensed. Then, the liquid becomes low-temperature and low-pressure by the expansion valve 3, and further evaporates in the evaporator 4 to be in a low-temperature and low-pressure gas state, and is returned to the compressor 1.

Next, the detected values of the sensors 5 to 13 are read, and these detected values are stored as undefined temperature data and pressure data, respectively. When the accumulated data reaches 5, calculating the moving average AVE _n for each temperature data and pressure data (S103). The moving average is calculated based on the latest five data. Then, for all the pressure data, until the difference between the latest moving average value and the previous moving average value satisfies | AVE _n -AVE _n-1 | ≦ 0.5 [kg / cm ² ] (1) This calculation is continued (S104). This is because the change in pressure per time becomes small and the refrigeration system 2
This is because when 0 approaches the steady operation state, the sensor detection point is specified and the sensor name is assigned.

Next, the above (1) is applied to all pressure data.
On condition that the formula is established, the sensor detection point identification / name assignment process is started. First, the value of the moving average AVE _n at this time, the temperature data T _B1 through T _B6, and the pressure data P _B1 ~P _B3 (S105).

Next, paying attention to the pressure data, P _B1 -P _B
The maximum value of _B3 is determined to be the high pressure, and the name of "high pressure" is given (S106), and the minimum value is determined to be the low pressure, and the name of "low pressure" is given (S107). Also, P
An intermediate value _B1 to P _B3 is determined that the hydraulic pressure imparting name "hydraulic pressure" (S108). This is because it is empirically known that, during normal operation, the discharge side of the compressor 1 is at a high pressure, the suction side of the compressor 1 is at a low pressure, and the hydraulic pressure is intermediate. is there.

Next, paying attention to the temperature data, the maximum value of T _{B1 to} T _B6 is determined as the compressor discharge gas temperature, and a name of “compressor discharge gas temperature” is given (S109), and the minimum value is compressed. The temperature is determined as the machine suction gas temperature, and a name of “compressor suction gas temperature” is given (S110). this is,
This is because it is empirically known that the temperature on the discharge side of the compressor 1 becomes high and the temperature on the suction side becomes low during normal operation. Next, | T _Bn −T _An | is calculated for all of the temperature data for which the name has not yet been determined among T _{B1 to} T _B6, the one with the minimum value is determined as the outside air temperature, and the “outside air temperature” is determined. (S111). This is because it is empirically known that the temperature change (temperature rise) during normal operation is the least at the outside air temperature.

At this stage, the compressor discharge gas temperature, compressor suction gas temperature, and outside air temperature have been determined.
The remaining three items (crankcase temperature, motor frame temperature, and refrigerant liquid temperature) are determined by the following procedure.

Firstly, based on the detection value of the sensor of the previously assigned name in step S106, "high pressure", the predetermined temperature - calculates the condensing temperature t _k in accordance pressure conversion table (S112). Of the temperature data is not determined names at this stage, those within the scope of t _k ~t _k -10 [℃] determines that the refrigerant liquid temperature to impart the name of "refrigerant liquid temperature". Narrow range which the sensor 12 for detecting the refrigerant liquid temperature is installed on the discharge side of the condenser 2, since the temperature of the refrigerant liquid immediately after the condensation is detected, the detected value is below the condensation temperature t _k This is because it is empirically known that it fits in the space. Incidentally, t _k ~t _k -10 when the temperature data to fall within the scope of [℃] there is a plurality, the temperature data having a value close to the most t _k and refrigerant fluid temperature (S113).

Next, of the temperature data of the remaining two items, the maximum value is determined as the crankcase temperature, a name of “crankcase temperature” is given, and the minimum value is determined as the motor frame temperature. "(S11)
4), end this routine. The remaining 2
The reason for determining the item is that it is empirically known that the crankcase temperature and the motor frame temperature take a higher value in the former.

The sensor name determined in this way is stored in a predetermined area of the memory 26, and the subsequent detection values of the sensors 5 to 13 are stored in the memory 26 in a form associated with the sensor name. Be recorded. Further, the recorded detection values are appropriately read out and used for monitoring and measuring pressure data and temperature data.

As described above, in the present embodiment, the detection values of the sensors 5 to 13 attached to each part of the refrigeration system 20 are stored as undefined temperature data and pressure data, respectively, and are stored in a known manner. By comparing with the characteristic, the detection point where each sensor is installed is specified. Therefore, it is possible to omit complicated work such as tracing the same color wiring from the detection point for each sensor, and to detect the detection points of each sensor on the sensor wiring measurement device / monitoring device side even when there are many installation sites. The specific work can be executed very efficiently and labor-saving, and the workload of the initial setting work can be reduced and the working time can be shortened.

As a known characteristic to be compared with the detected value, a predetermined range of the detected value is used instead of the configuration using the order of the detected value as in steps S106 to S108, and , The detection point may be specified when the detection point belongs to. However, in this embodiment,
Since the detection point is specified by using the order of the detection values as the known characteristics, when the refrigeration apparatus 20 is in a transient state until it enters a steady operation state and the detection value itself is different from that in the steady operation state Also, there is an advantage that the sensor detection point can be specified correctly.

Further, in this embodiment, the detection values of the sensors 5 to 13 are read separately with the detection value of the temperature sensor and the detection value of the pressure sensor. A configuration may be used in which sensors having different output voltage values are used for the sensors and the detection values of the temperature sensor and the pressure sensor are read without distinction. In such a configuration, since the temperature sensor and the pressure sensor can be distinguished on the measuring device 30 side from the difference in the output voltage value of each sensor, the worker connects the wiring of the sensor 5 or 13 to the measuring device 30. When connecting, it is not necessary to make the receptacles 32 and 34 different between the temperature sensor and the pressure sensor,
The burden on the worker can be further reduced, and such a configuration also belongs to the category of the present invention.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a mechanical configuration of a refrigeration apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an electrical configuration of the refrigeration apparatus according to the embodiment of the present invention.

FIG. 3 is a flowchart showing processing according to the embodiment of the present invention.

[Description of Signs] 1 compressor, 2 condenser, 3 expansion valve, 4 evaporator,
5,6,7,8,9,10,11,12,13 Sensors.

Claims (4)

[Claims] 1. A method for identifying a detection point of a sensor installed in a refrigeration / air-conditioning apparatus, comprising: a first step of operating a refrigeration / air-conditioning apparatus in which a plurality of sensors are installed; and detecting the plurality of sensors. A detection point specifying method, comprising: a second step of reading values individually; and a third step of specifying a detection point where a sensor is installed from characteristics of the read detection values. 2. The detection point specifying method according to claim 1, wherein the characteristic is a rank of a detection value. 3. The detection point specifying method according to claim 1, wherein the characteristic is a predetermined range of a detection value. 4. A detection point specifying device for a sensor installed in a refrigeration / air-conditioning device, comprising: storage means for storing known characteristics that can match characteristics of a detection value of the sensor; A comparison means for comparing the detected characteristic with the known characteristic; and a specification means for specifying a detection point of the sensor based on a comparison result.