JPH1123113A - Refrigerating machine remote performance diagnosing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remotely detect degradation of the capacity of a refrigerating machine in an early stage, by converting each detected signal from a temperature detecting means, a flow rate detecting means, and an opening detecting means into the operation data and transmitting the operation data, and calculating the result factor to indicate the refrigerating capacity to the energy consumption of the refrigerating machine based on the operation data. SOLUTION: The input signals from temperature detection sensors 8, 9, for detecting respectively the cooling water inlet temperature, and the cooling water outlet temperature of a refrigerating machine a flow rate sensor 10, and an opening detector 11 of a fuel control valve are converted into the digital data by a microcomputer control substrate 7. The digital data is accumulated in a second communication device as each operation data of the refrigerating machine, and transmitted to a first communication device 5 through a communication network 12. Each operation data is inputted in a data processing device 1 from the first communication device 5, the resultant factor to indicate the refrigerating capacity relative to the energy consumption of the refrigerating machine is calculated, and the calculated value is recorded in an auxiliary recording device 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator remote performance diagnosis apparatus for monitoring and diagnosing the performance of a refrigerator from, for example, a remote service center.

[0002]

2. Description of the Related Art Conventionally, the performance diagnosis of an absorption refrigerator is carried out by a service technician who goes to the site, reads various process values of the refrigerator from sensors, calculates and calculates a coefficient of performance (hereinafter referred to as COP). , Performance degradation was judged.

[0003]

Therefore, in order to detect a decrease in the capacity of the refrigerator at an early stage, a service person must be dispatched regularly and frequently to the refrigerator site remote from the service center. In addition, there is a problem that planned maintenance of the refrigerator becomes difficult. SUMMARY OF THE INVENTION It is an object of the present invention to provide a refrigerator remote performance diagnostic device capable of detecting a decrease in the capacity of a refrigerator early from a remote place and performing planned maintenance of the refrigerator.

[0004]

Means for Solving the Problems To solve the above problems and achieve the object, a refrigerator remote performance diagnosis apparatus of the present invention is configured as follows. (1) A refrigerator remote performance diagnostic device of the present invention comprises: a temperature detecting means for detecting a chilled water inlet temperature and a chilled water outlet temperature of a refrigerator;
Flow rate detection means for detecting the flow rate of the chilled water of the refrigerator, opening degree detection means for detecting the opening degree of the fuel control valve of the refrigerator, each of the temperature detection means, the flow rate detection means and the opening degree detection means A communication means for converting a detection signal into operation data and communicating the same, and a calculation means for calculating a coefficient of performance representing energy consumption versus refrigerating capacity of the refrigerator from the operation data communicated by the communication means. . (2) The refrigerator remote performance diagnostic apparatus of the present invention is the apparatus described in (1) above, and the calculating means calculates a refrigerator load based on a difference between the cold water inlet temperature, the cold water outlet temperature, and the cold water flow rate. And the heat input amount is calculated from the fuel control valve opening, and the coefficient of performance of the refrigerator is calculated from the refrigerator load and the heat input amount.

[0005]

FIG. 1 is a diagram showing a configuration of a refrigerator remote performance diagnosis apparatus according to an embodiment of the present invention. In order to calculate the COP of the refrigerator remote from the service center, a chilled water outlet temperature sensor 8,
A chilled water inlet temperature sensor 9, a chilled water flow sensor 10, and a fuel control valve opening detector 11 are attached. The input signals of the sensors 8 to 11 are taken in by the microcomputer control board 7 and converted into digital signal values. The converted digital signal value is taken in the second communication processing device 6 as refrigerator operation data, accumulated for a certain period of time, and then transmitted to the communication network 12 according to a dedicated communication protocol.

[0006] A communication network 12 is connected to the service center, and a first communication processing device 5 for performing communication in accordance with a dedicated communication protocol is installed on the service center as well as the refrigerator. The first communication processing device 5 receives refrigerator operation data from the communication network 12. The first communication processing device 5 includes the COP of the refrigerator.
Is connected to a data processing device 1 for calculating the capacity reduction and determining a decrease in performance.
The CRT 3 and the input device 4 are connected.

FIG. 2 is a diagram showing processing functions in the data processing device 1 of the refrigerator remote performance diagnostic device. The data processing device 1 includes, among the refrigerator operation data acquired by the first communication processing device 5, the chilled water inlet temperature, the chilled water outlet temperature,
A process 1a for calculating the refrigerator load from the cold water flow rate is performed, and a process 1b for calculating the fuel flow rate and the heat input amount (the inflow heat amount) from the fuel control valve opening is performed.

Next, a process 1c of calculating the refrigerator COP from the refrigerator load calculated in the process 1a and the heat input amount calculated in the process 1b and recording it in the auxiliary recording device 2 is performed. continue,
The COP threshold value input in advance by the input device 4 is compared with the COP calculated in the process 1c, and when the COP decreases, a process 1d of outputting an alarm message indicating the COP decrease to the CRT 3 is performed. Then, the past COP value is read from the auxiliary recording device 2, and CP is read from the trend graph.
Processing 1e for outputting to RT3 is performed.

The present invention is not limited to the above-described embodiment, but can be implemented with appropriate modifications without departing from the scope of the invention. (Summary of Embodiment) The configuration, operation and effect shown in the embodiment are summarized as follows.

The refrigerator remote performance diagnostic apparatus shown in the embodiment comprises a temperature sensor 8 for detecting a chilled water inlet temperature of the refrigerator and a temperature sensor 9 for detecting an outlet temperature of the refrigerator.
A flow rate sensor 10 for detecting a flow rate of cold water, an opening degree detector 11 for detecting an opening degree of a fuel control valve, a microcomputer control board 7 for converting an input signal from each sensor into digital data, and a microcomputer control board. 7 to store various operation data of the refrigerator, and communicate the various operation data of the refrigerator with a service center remote from the installation site of the refrigerator through a communication network 12 according to a dedicated communication protocol. Communication processing devices 5 and 6, and a data processing device 1 for calculating a coefficient of performance COP representing energy consumption versus refrigeration capacity of the refrigerator from the transmitted operation data and detecting a decrease in the performance of the refrigerator, The system comprises an auxiliary recording device 2 for recording the COP and a CRT 3 for displaying a warning message of a decrease in the capacity of the refrigerator.

Therefore, according to the refrigerator remote performance diagnostic apparatus, the signals of various sensors attached around the refrigerator are installed in the service center via the communication processing devices 5 and 6 as the operation data of the refrigerator. The data is sent to the data processing device 1. In the data processing device 1,
Each time the operation data is communicated, the COP is calculated and recorded in the auxiliary recording device 2, and when the COP falls below the threshold, C
A warning message indicating a decrease in the refrigeration function is displayed on RT3.

[0012] Therefore, the decrease in the capacity of the refrigerator can be detected from a remote place at an early stage, and the maintenance of the refrigerator can be planned. Further, since the data processing device 1 can automatically calculate various process values and the coefficient of performance without manual operation by a service person or the like, the calculation can be performed quickly and accurately, and the determination of the performance deterioration of the refrigerator can be made accurately. Can be performed.

[0013]

According to the refrigerator remote performance diagnostic apparatus of the present invention, each detection signal from the temperature detecting means, the flow rate detecting means and the opening degree detecting means is converted into operation data and communicated, and the refrigeration is performed based on the operation data. Since the coefficient of performance indicating the energy consumption of the refrigerator and the refrigeration capacity is calculated, a decrease in the performance of the refrigerator can be detected early from a remote place, and the maintenance of the refrigerator can be planned.

According to the refrigerator remote performance diagnostic apparatus of the present invention, the refrigerator load is calculated from the difference between the chilled water inlet temperature and the chilled water outlet temperature and the chilled water flow rate, and the heat input is calculated from the fuel control valve opening. Since the coefficient of performance of the refrigerator is calculated from the load of the refrigerator and the amount of heat input, various process values and the coefficient of performance can be automatically calculated without manual operation by a service person or the like, so that the calculation can be performed quickly and accurately. In addition, it is possible to accurately determine the performance deterioration of the refrigerator.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a refrigerator remote performance diagnosis apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a processing function in a data processing device of the refrigerator remote performance diagnosis device according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 data processing device 2 auxiliary recording device 3 CRT 4 input device 5 first communication processing device 6 second communication processing device 7 microcomputer control board 8 cold water outlet temperature sensor 9 cold water inlet temperature sensor 10 ... Chilled water flow rate sensor 11 ... Fuel control valve opening detector 12 ... Communication network

Claims (2)

[Claims] A temperature detecting means for detecting a chilled water inlet temperature and a chilled water outlet temperature of the refrigerator; a flow rate detecting means for detecting a flow rate of the chilled water of the refrigerator; and an opening for detecting a fuel control valve opening of the refrigerator. Degree detecting means, a communication means for converting each detection signal from the temperature detecting means, the flow rate detecting means and the opening degree detecting means into operation data and communicating the operation data, and the refrigeration from the operation data communicated by the communication means. Calculating means for calculating a coefficient of performance representing energy consumption versus refrigerating capacity of the refrigerator; and a remote performance diagnostic device for the refrigerator. 2. The refrigerator according to claim 1, wherein the calculating means calculates a refrigerator load from the difference between the chilled water inlet temperature and the chilled water outlet temperature and the chilled water flow rate, and calculates a heat input amount from the fuel control valve opening. The refrigerator remote performance diagnostic apparatus according to claim 1, wherein a coefficient of performance of the refrigerator is calculated from a load and the heat input.