JP3133554B2 - Air conditioner remote monitoring system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring system, such as an absorption refrigerator or a gas engine heat pump, which utilizes combustion heat of a gas or the like as a high-temperature heat source or a driving force source. It uses a telephone line.

[0002]

2. Description of the Related Art Conventionally, as a remote monitoring system of this type, a system shown in FIG. 4 is well known. This monitoring system is a combination of the automatic gas metering system and the remote monitoring of the air conditioner 1 because the gas metering is being automated mainly with the spread of the microcomputer gas meter 4.

[0003] Therefore, an air conditioner 1 using gas as a fuel is
A monitoring device 2 having a communication modem (not shown) is connected via a signal communication line 11, and a telephone 5 installed in an air-conditioning control room or the like on the customer side is connected to the monitoring device 2 via a telephone line 23. The telephone line communication device 3 for connecting to the public telephone line 21 is connected via the telephone line 24, and the signal line 1 is connected to the telephone line communication device 3.
2, a microcomputer gas meter 4 for measuring the amount of gas used to be supplied to the air conditioner 1 is connected.

Therefore, the customer picks up the telephone 5 installed in the air-conditioning control room or the like and dials the telephone line 23, the monitoring device 2, and the telephone line 2 as before.
4. It is possible to communicate with the outside via the telephone line communication device 3 and the public telephone line 21. The gas company enters the telephone line communication device 3 via the public telephone line 21 and the microcomputer gas meter 4 The operating condition of the air conditioner 1 monitored by the monitoring device 2 can be appropriately grasped as well as the measured gas usage amount.

[0005]

However, in the conventional remote monitoring system having the above configuration, it was necessary to equip three telephone lines, so that not only the equipment cost was high but also the monthly communication cost was high. There has been such a problem, and a solution to this problem has been an issue.

[0006]

SUMMARY OF THE INVENTION The present invention, as a specific means for solving the above-mentioned problems of the prior art, relates to a remote monitoring system for an air conditioner using combustion heat of gas or the like as a high-temperature heat source or a driving force source. A fuel gauge for measuring the fuel supply amount, and a monitoring device that inputs operation information of the air conditioner via a signal communication line, detects an abnormal state and the like from this information, and stores a protocol, A remote monitoring system for an air conditioner, comprising: a communication device for a telephone line for connecting to a public telephone line, wherein the fuel gauge is connected via a dedicated signal communication line,

A monitoring device for inputting the temperature of the regenerator and the temperature of the cooling water flowing into the absorber via the signal communication line as operation information, and a communication device connected to the monitoring device via the signal communication line. In the remote monitoring system of the absorption refrigerator having the above, the reference temperature for predicting the temperature abnormality of the regenerator is higher as the cooling water temperature is higher in a temperature range lower than the abnormality determination temperature for determining the temperature abnormality of the regenerator. And a remote monitoring system for an air conditioner, characterized in that the above-mentioned problem of the prior art is solved.

[0008]

A gas company that installs an air conditioner and supplies fuel enters a communication device for a telephone line using a public telephone line and connects to a communication device for a microcomputer gas meter or the like. Fuel consumption measured by
The operating condition of the air conditioner by the monitoring device can be properly grasped, and the customer can communicate with the outside via a telephone line communication device.

Claim 2: When the temperature of the cooling water rises, the limit temperature for predicting the temperature abnormality of the regenerator is determined by appropriately raising the limit temperature, so that highly accurate abnormality prediction can be performed.

[0010]

(Embodiment 1) A first embodiment of the present invention will be described in detail with reference to FIG. Note that, in this figure, portions denoted by the same reference numerals as those shown in FIG. 4 are portions having the same functions as the portions described with reference to FIG. 4, and description thereof will be omitted to the extent that the understanding of the present invention is not hindered. .

In FIG. 1, reference numeral 1 denotes an air conditioner comprising an absorption refrigerator using gas as a fuel or a heat pump driven by a gas engine. And the remote monitoring system in this case is
The monitoring device 2 and the telephone line communication device 3 are connected to the signal communication line 13.
And a telephone line 22 connected to the telephone 5 on the customer side is connected to the communication device 3 for telephone line.

The customer can dial the telephone 5 to communicate with the outside through the telephone line 22, the telephone line communication device 3, and the public telephone line 21,

The gas flow rate measured by the microcomputer gas meter 4 is sent to the gas company via the telephone line communication device 3 and the public telephone line 21 and is set in advance with the operation information of the air conditioner 1 input to the monitoring device 2. The set values are compared and calculated, and when an abnormality occurs, the monitoring device 2 appropriately contacts a gas company or a service station of the equipment via the signal communication line 13, the telephone line communication device 3, and the public telephone line 21. So that you can make inquiries from gas companies and equipment service stations.

For this reason, the monitoring device 2 has functions such as an input / output unit, a memory unit, and a comparison operation processing unit which the control device normally has, and a telephone so that the obtained information can be output via a telephone line. A communication protocol suitable for the line communication device 3 is provided.

(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described mainly with reference to FIGS.

FIG. 2 shows an absorption chiller / heater in which the air conditioner 1 shown in FIG. 1 is provided so as to evaporate and separate a refrigerant by heating a solution with a high-temperature regenerator by, for example, heat of combustion of gas. Whether this air conditioner 1 is functioning normally
The temperature T of the solution being heated inside the high-temperature regenerator is determined whether an abnormality has occurred or whether there is any sign of abnormality.
1 shows one reference example for discriminating based on the relationship between 1 and the inlet side temperature T2 of cooling water taken in for cooling the absorber.

In FIG. 1, a solution temperature T1 is a predetermined temperature,
For example, if the temperature becomes 165 ° C. or higher, it is determined that an abnormality has occurred regardless of the cooling water temperature T2, and it is determined that the temperature is lower than 165 ° C. and an abnormality is about to occur. It is provided so as to be changed according to the cooling water temperature T2.

That is, when the cooling water temperature T2 is lower than a predetermined temperature, for example, below 28 ° C., if the solution temperature T1 is higher than 158 ° C., it is determined that some abnormality occurs, and the cooling water temperature T2 becomes higher than 28 ° C. The solution temperature T
Therefore, the lower limit of the solution temperature T1 for predicting an abnormality is 160 ° C. or more, since the range of normality is increased to a certain extent.

An example of control for monitoring normal, abnormal and abnormal predictions separately as shown in FIG. 2 will be specifically described with reference to the flowchart of FIG.

In step S1, the temperature T1 of the solution in the high-temperature regenerator is input, and in step S2, the temperature T2 of the cooling water flowing into the absorber is input.

Then, in step S3, it is determined whether or not the solution temperature T1 is equal to or higher than a predetermined 165 ° C., and if the determination is affirmative, a signal indicating that an abnormality has occurred is output.
When the determination is no, the process proceeds to step S4.

In step S4, it is determined whether or not the cooling water temperature T2 has reached a predetermined temperature of 28 ° C. If NO, the process proceeds to step S5, and if YES, the process proceeds to step S6.

In step S5, the solution temperature T1 is set to a predetermined 1
It is determined whether the temperature is equal to or higher than 58 ° C., and when it is determined as no, a signal indicating that it is normal is output, and when it is determined as yes, predictive information that there is a sign of abnormality is output.

In step S6, it is determined whether or not the solution temperature T1 is equal to or higher than a predetermined value of 160 ° C., and if it is no, a signal indicating that it is normal is output. Is output.

Since the present invention is not limited to the above-described embodiment, various modifications can be made without departing from the spirit of the appended claims.

For example, the range of abnormality prediction based on the solution temperature T1 and the cooling water temperature T2 shown in FIG. 2 can be changed not only for the lower limit value but also for the upper limit value, and can be increased in proportion to the cooling water temperature T2. Can also be provided.

The monitoring device 2 and the telephone line communication device 3
It is also possible to adopt an externally integrated configuration.

[0028]

As described above, according to the present invention, in a remote monitoring system for an air conditioner using combustion heat of a gas or the like as a high-temperature heat source or a driving force source, a fuel meter for measuring a fuel supply amount, The operation information of the harmony device is input via a signal communication line, an abnormal state is detected from the information, and a monitoring device storing a protocol, and the monitoring device and the fuel gauge are each connected via a dedicated signal communication line. Connected,
A telephone line communication device for connecting to a public telephone line;
Since it is a remote monitoring system for air conditioners characterized by having

It is possible to construct a simple remote monitoring system using a communication device for a microcomputer gas meter which is becoming popular, and it is possible to reduce the number of telephone lines. Communication costs can also be reduced.

The gas flow rate measured by a fuel gauge such as a microcomputer gas meter is sent to a gas company via a telephone line communication device and a public telephone line, and the operating information of the air conditioner input to the monitoring device is set in advance. Comparing and calculating with the set values, and in the event of an abnormality, the monitoring equipment should contact the gas company or service station of the equipment via the signal communication line, telephone line communication device, or public telephone line as appropriate. It is also possible to make a reverse inquiry from a gas company or equipment service station.

Further, since a fuel gauge such as a microcomputer gas meter is connected to a communication device for a telephone line via a signal communication line different from the monitoring device, even if the monitoring device breaks down, the fuel consumption etc. Will not affect your submission.

Further, a monitoring device for inputting, as operation information, the temperature of the regenerator and the inlet side temperature of the cooling water flowing into the absorber via a signal communication line, and a communication device in which the monitoring device is connected via a signal communication line. In the remote monitoring system of the absorption refrigerator having a device, the higher the cooling water temperature in the temperature range lower than the abnormality determination temperature to determine the temperature abnormality of the regenerator the reference temperature for predicting the temperature abnormality of the regenerator, the higher the temperature. In a remote monitoring system that changes

The abnormality can be finely predicted by the level of the inlet temperature of the cooling water taken into the absorber, and the abnormality prediction accuracy is greatly improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of a remote monitoring system.

FIG. 2 is a reference example for determining the operation status of the air conditioner.

FIG. 3 is a flowchart for determining an operation state of the air conditioner.

FIG. 4 is a block diagram of a conventional remote monitoring system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 air conditioner 2 monitoring device 3 telephone line communication device 4 microcomputer gas meter 5 telephone 11.12.13 signal communication line 21 public telephone line 22.23.24 telephone line

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-186171 (JP, A) JP-A-63-297970 (JP, A) JP-A-63-65258 (JP, A) 67966 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F25B 49/04

Claims (2)

(57) [Claims] 1. A remote monitoring system for an air conditioner using combustion heat of a gas or the like as a high-temperature heat source or a driving force source, comprising: a fuel gauge for measuring a fuel supply amount; A public telephone line, which is input via a communication line, detects an abnormal state or the like from the information, and stores a protocol, and the monitoring device and the fuel gauge are connected via dedicated signal communication lines, respectively. And a telephone line communication device for connection to the air conditioner. 2. A monitoring device for inputting, as operation information, a regenerator temperature and a cooling water inlet side temperature flowing into an absorber via a signal communication line, and a communication device in which the monitoring device is connected via a signal communication line. A system for remotely monitoring an absorption refrigerator having a device, wherein the reference temperature for predicting the temperature abnormality of the regenerator is higher when the cooling water temperature is higher in a temperature range lower than the abnormality determination temperature for determining the temperature abnormality of the regenerator. A remote monitoring system for an air conditioner, wherein the temperature is changed to a high temperature.