JP3285099B2 - Absorption refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigerator which performs a required heat exchange operation using an absorption liquid obtained by mixing a heat absorber with a vaporizable refrigerant.

[0002]

2. Description of the Related Art As this type of apparatus, for example, an absorption refrigerator using an absorption liquid such as an aqueous solution of lithium bromide in which an absorbent is mixed with lithium bromide and water is known.
There is one configured as the absorption refrigerator 100 of FIG.

[0003] In FIG. 6, a thick solid line part is a liquid line of the refrigerant liquid or the absorbing liquid, and a double line part is a vapor line of the refrigerant vapor. First, the circulating system of the absorbing liquid is provided at the bottom of the absorber 1. The description will be made with the accumulated low concentration absorbing solution, that is, the diluted solution 2a as a starting point.

[0004] The dilute solution 2a enters the high temperature regenerator 5 via the pipe 4 by the pump 3. Since the high-temperature regenerator 5 is heated by the heater 6 from below, the refrigerant contained in the dilute liquid 2a evaporates and becomes a high-temperature medium-density absorbent, that is, the intermediate liquid 2b. And the refrigerant vapor 7a. Exhaust gas from the heater 6 is exhausted by an exhaust gas pipe 6A.

[0005] The high-temperature intermediate liquid 2 b enters a heat exchanger 9 via a pipe 8. In the heat exchanger 9, the high-temperature intermediate liquid 2 b gives heat to the diluted liquid 2 a passing through the pipe 4 to radiate heat, and after the temperature becomes low, enters the low-temperature regenerator 11 through the pipe 10.

In the low-temperature regenerator 11, since the refrigerant vapor 7a is sent to the radiator 11A via the pipe 21 for heating, the refrigerant contained in the intermediate liquid 2b evaporates and becomes high in temperature. The concentrated liquid 2c is separated into the concentrated liquid 2c and the refrigerant vapor 7b.

[0007] The hot concentrated liquid 2c enters the heat exchanger 13 via the line 12. In the heat exchanger 13, the high temperature concentrated liquid 2c is
The diluted liquid 2a passing through the pipe 4 is radiated by giving heat to a medium temperature, and then, after reaching a medium temperature, enters the sprayer 1A in the absorber 1 via the pipe 14 and is sprayed from a number of holes of the sprayer 1A.

The sprayed concentrated liquid 2c is cooled by cooling water 32a passing through a cooling pipe 1B. During this cooling, the concentrated liquid 2c is removed from the refrigerant vapor 7 coming from the adjacent evaporator 26.
c is absorbed and diluted, returns to the low-temperature diluted liquid 2a, and repeats a cycle of completing one cycle of the absorbing liquid.

Next, the refrigerant circulation system will be described with the refrigerant vapor 7C entering the absorber 1 as a starting point. The refrigerant vapor 7c is
As described in the above-described absorbent circulation system, the concentrated liquid 2c dispersed from the sprayer 1A in the absorber 1 absorbs the diluted liquid 2a.
Into the refrigerant vapor 7a in the high-temperature regenerator 5.

[0010] The refrigerant vapor 7a enters the radiator 11A via the pipe 21, gives heat to the intermediate liquid 2b to radiate heat, condenses into a refrigerant liquid 24a, and then passes through the pipe 22 to the condenser. 2
Enter the bottom of 5.

The condenser 23 is provided with a refrigerant vapor 7b which enters through a number of passages 11B between the adjacent low-temperature regenerators 11b.
Is cooled by cooling water 32a passing through the cooling pipe 23A, and the refrigerant vapor 7b is condensed into a low-temperature refrigerant liquid 24a. The refrigerant liquid 24a enters the evaporator 26 via the pipe 25, and becomes the refrigerant liquid 24b.

The pump 27 is connected to a refrigerant line 24b through a line 28.
A, via the pipe 28, to the sprayer 26A,
Repeat spraying from multiple holes in A. The sprayed coolant liquid 24b cools the cold water 35a passing through the cooling pipe 26B. At the time of this cooling, the refrigerant liquid 24b absorbs heat from the cold water 36a and evaporates to become refrigerant vapor 7c, and then passes through the many passages 26C between the adjacent absorber 1 and the absorber 1
And the circulation of the circulation of the refrigerant is completed.

The cooling pipes 1B, 23A and 26B and the radiator 1
1A is formed by, for example, a meandering tube to obtain required cooling and heat radiation.

Further, the high-temperature intermediate liquid 2b to be put into the heat exchanger 9 for operation switching is bypassed to the absorber 1 by the pipe 41 and the on-off valve 41A for opening and closing this bypass. The absorption liquid bypass system and the refrigerant vapor 7a to be put into the low-temperature regenerator 11 are passed through a pipe 42 and an on-off valve 4 for opening and closing this bypass.
2A, a refrigerant vapor bypass system that is bypassed to the absorber 1 and returned, and a refrigerant liquid 24b to be sprayed from the sprayer 26A, and a pipeline 43 that bypasses the pipeline 28 and the pipeline 4. Further, a refrigerant liquid bypass system is provided for bypassing the refrigerant liquid 24b and mixing with the absorbing liquid 2a by an open / close valve 43A for opening and closing the bypass.

The operation of each system is performed by opening and closing valves 41A, 42A, 4
By operating each of the above-mentioned circulation systems in a state where 3A is closed and the bypasses 41, 42 and 43 are closed, the cold water 36a supplied from the pipe 35 is cooled by the cooling pipe 26B and the pipe 37
And a heating operation described later.

During the heating operation, the on-off valves 41A and 4A
By opening 2A and 43A and opening each of the bypasses 41, 42 and 43, the functions of the low-temperature regenerator 11 and the condenser 23 are stopped, and the flow of the cooling water supplied from the pipe 31 is stopped. Further, by replacing the cold water 36a from the pipe 35 with the water to be heated, high-temperature heated water is supplied from the pipe 37 instead of the cooling water 36a for cooling.

As a specific configuration of the absorption chiller 100, a configuration as shown in FIG. 7 (hereinafter referred to as a first prior art) was disclosed in July 1990 by the applicant of the present invention, Sanyo Electric Co., Ltd. Water Machine / Absorption Refrigerator C Series Catalog '
90-7 ", published by Ohmsha in February 1989," Practical Knowledge of Air Conditioning Equipment ".

In FIG. 7, portions indicated by the same reference numerals as those in FIG. 6 are portions having the same functions as those described in FIG. In the present invention, the absorber 1, the high-temperature regenerator 5, and the heat exchanger 9 in FIGS.
A part for performing a required heat exchange operation such as a low-temperature regenerator 11, a heat exchanger 13, a condenser 23, an evaporator 26, etc. is provided with a heat exchange device or a dilute solution 2a, an intermediate liquid 2b, a concentrated liquid 2c, etc. The absorbing liquid and the fluid on the side that performs the thermal operation, such as the refrigerant, such as the refrigerant vapor 7a and the refrigerant liquid 24, are converted into the heat operation fluid and the cooling water 32a.
The fluid on the side to be subjected to the thermal operation, such as the cooling water 32b, the cold water 36a, and the cold water 36b for cooling, is referred to as a heated operation fluid.

The following prior arts are available in the absorption refrigerator as the first prior art. That is, a detection portion that detects the temperature inside the required heat exchanger equipment and the temperature of the fluid in the required pipe line to detect a stable state, and when each heat exchange equipment is in a transient state. A configuration in which a diagnosis blocking portion for stopping diagnosis and a detection value obtained by the above detection are compared with one predetermined reference value provided for each of a plurality of determination elements, and a diagnosis result of each section is displayed. (Hereinafter referred to as a second prior art) is disclosed in Japanese Patent Application Laid-Open No. 64-2845.
No. 4, for example. In addition, cold water 36b
(Hereinafter, referred to as a third conventional technique) that determines whether or not the flow rates of the cooling waters 32a and 32b are appropriate based on the temperature of the cooling water 32a and the temperature of the cooling water 32b, and displays the appropriateness of the flow rates. It is disclosed in, for example, JP-A-64-28456. Further, based on the inlet and outlet temperatures of the diluted liquid 2a flowing through the heat exchanger 9 on the high temperature side and the inlet and outlet temperatures of the intermediate liquid 2b, the diluted liquid 2a
Japanese Patent Laid-Open No. 63-118 discloses a configuration in which the operation of the pump 3 is controlled by judging whether the flow rate of the pump 3 is appropriate.
No. 571, for example. And cold water 3
A configuration in which the ratio of the temperature difference between the refrigerant vapor 7b and the cooling water 32b to the temperature difference between the temperature of the cold water 36b and the temperature of the cold water 36b is displayed as a dirt index of the pipe 23A of the condenser 23 (hereinafter referred to as a fifth conventional technique). Japanese Patent Laid-Open No. 2-13036).
No. 3 discloses this.

Further, a diagnostic blocking portion similar to that of the second prior art is provided, and the temperature difference between the refrigerant vapor 7b and the cooling water 32b in the fifth prior art is replaced with a temperature difference. Japanese Patent Laid-Open No. 2-3 discloses a configuration for diagnosing and displaying dirt on a pipe 26B of an evaporator 26 by using the temperature of the refrigerant vapor 7c (hereinafter referred to as a sixth prior art).
3577 and the like. Further, the temperature of the intermediate liquid 2b, the pressure of the refrigerant vapor 7a, the liquid surface position of the rare liquid 2a and the temperatures of the cold water 32a and 32b in the high-temperature regenerator 5,
The normal operation of the absorption chiller is stopped when any of the physical quantities such as the flow rate reaches the abnormal limit value, and an alarm is issued when the warning set value before reaching the abnormal limit value is reached. Japanese Patent Application Laid-Open No. Sho 62-116871 discloses a configuration for storing and displaying a time when a set value for warning / abnormal limit value is reached, a physical quantity at that time, and an on / off state of each driving portion (hereinafter referred to as a seventh conventional technique). And the like. Then, when a detected value of the temperature and pressure of the internal space of the required heat exchange equipment reaches a predetermined value, the operation of the apparatus is stopped and an alarm is issued (hereinafter, referred to as an eighth conventional technique). It is disclosed in JP-A-1-142374 and the like.

[0021]

The second prior art described above
In the configuration of the sixth prior art, when the operation of the heat exchange equipment is in a transitional state, the diagnosis is blocked, so that even if an abnormal value occurs in the transitional operation state, an abnormality is found. There is a disadvantage that it cannot be done.

In the configuration of the third prior art, the cooling water 3
In the configuration of the fourth prior art, only the suitability of the flow rate of the diluent 2a is determined. In the configuration of the fifth prior art, only the dirt on the conduit 23A of the condenser 23 is determined. In the configuration described above, only the contamination of the pipe 26B of the evaporator 26 is detected. In the eighth prior art, the operation is stopped if there is an abnormality. In addition, it is not completely clear whether or not the apparatus has been operated, and there is a disadvantage that the apparatus must be operated again in order to perform repair and maintenance work.

Further, the location to be detected is the required internal temperature of the heat exchanger equipment in the second prior art, the fifth prior art, and the sixth prior art, and the required temperature in the seventh prior art. It is necessary to detect not only the temperature, liquid surface position, and pressure inside the heat exchanger equipment but also the flow rate in a required pipe line, which is disadvantageous in that the configuration becomes extremely complicated.

Therefore, there is a problem that provision of a simple device free of such inconvenience is desired.

[0025]

According to the present invention, there is provided a circulating system for circulating a heat operation fluid such as an absorbing liquid and a refrigerant liquid via a plurality of heat exchange devices as described above; In addition to providing a circulation path for circulating the heated fluid to be cooled or heated via a required one of the above, an absorption refrigerator provided with a function of monitoring the operation state of the above heat exchange equipment. Temperature detecting means for detecting only the temperature of a required pipe line among the respective passage points of the heat operated fluid and the heat operated fluid to obtain only the detected temperature values; and The respective temperature difference values between the inlet side and the outlet side of each pipe for each of the above heat exchange equipments with respect to all the above heat exchange equipments obtained based only on each detected temperature value, Is converted to a ratio value to a preset reference value for each An abnormal stage determining means for determining which of the plurality of abnormal stages the ratio value belongs to, and each abnormal stage for which the above determination has been obtained for each of the above heat exchange devices. A first configuration in which display means for displaying each of the heat exchange devices is provided;
Instead of the abnormal stage determination means in the configuration of the above, the inlet side and the outlet side of each pipe line for each of the heat exchange devices with respect to all the heat exchange devices obtained based on only the above detected temperature values And a second configuration that includes an abnormal stage determining unit that compares the temperature difference value with a plurality of reference values set in advance for each of the pipelines to determine which of the plurality of abnormal stages belongs to. Thus, the above-mentioned problems can be solved.

[0026]

In the state where the apparatus is performing the cooling operation or the heating operation, only the detected temperature values obtained by detecting only the respective temperatures at the required pipe locations between the heat operation fluid and the heat operation fluid are detected. Based on this, the temperature difference of each pipe line for each heat exchange device with respect to all the heat exchange devices is calculated as a ratio to each reference value when each heat exchange device is set in a normal operation state. Thus, the value corresponding to the progress of the abnormality,
That is, each abnormality degree ratio is calculated.

By comparing values corresponding to a plurality of abnormal stages set in advance with the above-mentioned abnormal degree ratios, it is determined which of the abnormalities belongs, and the abnormal stages obtained by the determination are corresponded. Since the display for each heat exchange device for all heat exchange devices to be performed is displayed, this display can be used to monitor the degree of progress of the abnormality of each heat exchange device type for all heat exchange devices. Act to be able to In addition, without performing the above-described ratio calculation, the abnormal stages obtained by comparing each of the reference values corresponding to the plurality of abnormal stages set in advance and the detected temperature values to determine each abnormal stage are determined by all the heat exchange devices. In the same way as described above, it operates to display each heat exchange equipment for each type of heat exchange equipment, and monitors the degree of progress of the abnormality of each heat exchange equipment type for all heat exchange equipment. Act to gain.

[0028]

An embodiment will be described below with reference to FIGS.
In these figures, portions indicated by the same reference numerals as those in FIGS. 6 and 7 are portions having the same functions as those described with reference to FIGS. 6 and 7.

First Embodiment First, as a first embodiment, the first embodiment will be described with reference to FIGS.
An example of the configuration will be described. The configuration of FIGS. 1 to 3 includes a plurality of heat exchange devices, that is, a heat exchanger 13, a heat exchanger 9, a high-temperature regenerator 5, a low-temperature regenerator 11, and a condenser, as in the first related art. A circulating system for circulating a heat operation fluid such as an absorbing liquid and a refrigerant liquid via the evaporator 23, the evaporator 26, the absorber 1, etc., and cooling or heating via a required one of the heat exchange devices. In the absorption refrigerator provided with a function of monitoring the operation state of the heat exchange devices, as described in the second related art, a circulation path for circulating the fluid to be heated is provided. Only the temperature at the point of the required pipe line among the respective passage points with the heated operation fluid,
For example, the temperature detectors that detect the temperature detectors D1 to Dn to obtain the respective detected temperature values TD1 to TDn, and all the heat exchange devices obtained based only on the above detected temperature values TD1 to TDn, for example, , Heat exchanger 13 and heat exchanger 9
・ High temperature regenerator 5 ・ Low temperature regenerator 11 ・ Condenser 23 ・ Evaporator 26 ・ Temperature difference of temperature difference value TT1 to TTn between inlet side and outlet side of each pipe for each heat exchange device with respect to absorber 1 A value, for example, a logarithmic average temperature difference is stored in a reference data memory of a processing unit (hereinafter, referred to as a CPU in the present invention) 50 by a microcomputer to each of the reference values S1 to Sn preset for each of the pipes. The value is converted by the CPU 50 to a value, for example, a% value.
This ratio value is set in advance for each of a plurality of abnormal stages, for example,
An abnormal step discriminating means for discriminating which of the plural steps, such as less than 150%, 150-200%, and more than 200%, the CPU 50 discriminates, and each abnormal step obtained as a result of the above discrimination is displayed on the display 60 as abnormal. The display unit is provided with display means for displaying each heat exchange device for all the heat exchange devices by the indicator lamps in which the stages are color-coded.

Specifically, as shown in FIG. 1, with respect to the heat exchanger 13 on the low temperature side, the diluted liquid 2a in the pipe 4 is arranged at each inlet side and each outlet side passing through the heat exchanger 13. Temperature detection values TD1 and TD2 detected by the detected temperature detectors D1 and D2,
With respect to the concentrated liquid 2d in the pipelines 12 and 14, the temperature detection values TD6 and TD7 detected by the temperature detectors D6 and D7 arranged on the inlet side and the outlet side of the heat exchanger 13 are obtained.

For the heat exchanger 9 on the high temperature side, the temperature of the dilute solution 2a in the pipe 4 detected by the temperature detectors D2 and D3 disposed on each inlet side and each outlet side passing through the heat exchanger 9 The detection values TD2 and TD3 and the temperature detection values TD4 and TD5 detected by the temperature detectors D4 and D5 disposed on the inlet side and the outlet side of the heat exchanger 9 are obtained for the intermediate liquid 2b in the pipelines 8 and 10.

For the high-temperature regenerator 5, in addition to the temperature detection values TD3 and TD4 obtained by the temperature detectors D3 and D4, the temperature detection value TDn detected by the temperature detector Dn disposed in the exhaust gas pipe 6A is used. obtain.

For the low-temperature regenerator 11, in addition to the temperature detection values TD5 and TD6 obtained by the temperature detectors D5 and D6, a temperature detector D8 disposed in the pipe 22 for the refrigerant liquid 24a in the pipe 22 is used. The detected temperature detection value TD8 is obtained.

For the condenser 23, the cooling water 32 a in the pipe 33 is connected to a temperature detector D 1 disposed in the pipe 33.
2, the temperature detection value TD9 detected by the temperature detector D9 disposed in the pipe 25 for the refrigerant liquid 24a in the pipe 25, and the cooling water 32 in the pipe 34.
For b, a temperature detection value TD13 detected by the temperature detector D13 arranged in the pipeline 34 is obtained.

For the evaporator 26, the cold water 3
6a, the temperature detection value TD14 detected by the temperature detector D14 disposed in the pipe 35, and the temperature detector D1 disposed in the pipe 37 for the cold water 36b for cooling the pipe 37.
5, the temperature detector D arranged in the pipe 28A for the temperature detection value TD15 and the refrigerant liquid 24b in the pipe 28A.
A temperature detection value TD10 detected at step 10 is obtained.

For the absorber 1, the above-mentioned temperature detector D
Temperature detection values TD1, TD7 based on 1.D7, D12,
The temperature detection value TD of the cooling water 32a in the pipe 31 detected by the temperature detectors D11 and D12 arranged in the pipe 31.
11 · TD12.

Each signal detected by each of the temperature detectors D1 to Dn is led to the input / output port 51 of the CPU 50 as shown in FIG.
The data is temporarily stored in the work data memory 52 of the PU 50.
The CPU 50 performs processing according to a flow as shown in FIG. 3 based on arithmetic processing by a program stored in the processing memory 54.

{Circle around (1)} In step [SP1], the above-mentioned detected temperature values TD1 to TDn are temporarily stored in the work data memory 52.

{Circle around (2)} In step [SP2], as the data to be processed this time, the work data memory 52 corresponds to each of the predetermined heat exchange devices among the temperature detection values TD1 to TDn, for example, the heat exchanger 13. One set of data on the inlet side and outlet side of each pipeline, for example, TD1, TD2 and TD6, TD
7 is read out, the logarithmic average temperature difference is calculated, and the temperature difference value TT is calculated.
Get 1. In addition, about the data processed at this time,
It is specified by a subsequent step [SP7]. For the high-temperature regenerator 5, TDn, TD3, and TD4 are read to calculate the logarithmic average temperature difference, and for example, for the absorber 1, TD11 and TD12 are read (TD1
The logarithmic average temperature difference may be calculated from 1-TD12).

In step [SP3], a corresponding reference value, for example, S1, is read out from each of the reference values S1 to Sn stored in the reference data memory 53, and the ratio of the temperature difference value TT1 to the reference value S1 is calculated as% Calculate by value.

{Circle around (4)} In steps [SP4 to SP6], the% value calculated in the previous step is replaced with a plurality of step values C1 to Cn stored in the reference data memory, for example, less than 150%,
The values are sequentially compared and discriminated from 50 to 200% and values exceeding 200%.
A warning signal A2 when the value is 0% to 200%, an alarm signal A3 when the value is more than 200%, and a sign signal indicating the heat exchange equipment and the pipeline at the location where the calculation and determination are performed, for example, the heat exchange equipment. The corresponding signals among the signals obtained by adding the code signals A to D of the temperature detection points to the class identification signals R1 to Rn are added as flag signals, and given to the display 60 via the input / output port 51. The calculation and discrimination based on TD1 and TD2 are performed, and if it exceeds 200%, the signal of R1-AA3 is output.

In step [SP7], data to be processed in the next order is specified.

The CPU 50 repeats the process for each pipe in each heat exchanger sequentially at a predetermined cycle, for example, every 10 seconds.

The display 60 selects and displays the names or symbols of the heat exchange equipment and the pipeline corresponding to the flag signal from the CPU 50, and displays green when the steady signal A1 is displayed and green when the caution signal A2 is displayed. In the case of the yellow and alarm signal A3, the red indicator light is turned on, and in the case of the alarm signal A3, the horn 62 is sounded to alert the observer.

The setting input circuit 70 stores the required reference values S1 to Sn relating to the temperature value and the required step values C1 to Cn relating to the ratio in the reference data memory, or changes and stores the stored values. Operating circuit for the CPU
50 keyboards can be substituted.

[Second Embodiment] Next, as a second embodiment, referring to FIGS.
An example of the configuration will be described. 4 and 5, the temperature detecting means is configured in exactly the same manner as the first embodiment except that the temperature detection values TD1 to TDn are output as analog values, In addition, the configuration is such that the part of the display means for each abnormal stage is changed to the following means.

Only the detected temperature values TD1 to TDn are applied, for example, in analog voltage to the differential voltage circuits DV1 to DVn of the detection display sections P1 to Pn provided for each heat exchange device for all heat exchange devices. Given, each detected temperature value TD1
To TDn, the voltages VT1 to VTn corresponding to the temperature difference between the inlet side and the outlet side of each pipe with respect to all the heat exchangers obtained from each of the heat exchangers, and a plurality of reference values preset for each pipe. , For example, 1
An abnormal stage determining means for determining which of a plurality of abnormal stages, such as less than 50%, 150 to 200%, and more than 200%, is provided.

More specifically, as shown in FIG. 4, the above-mentioned detected temperature values TD1 to TDn are supplied to the detection display sections P1 to Pn provided for the respective heat exchange devices as analog values of the detected voltage. The detection display units P1 to Pn have the same configuration. For example, when the detection display unit P1 is described as an example, as shown in FIG.
It is composed of a comparison detection circuit, a logic circuit, a display circuit and the like.

In the detection display circuit P1 of FIG. 5, a difference voltage circuit DV1 is a circuit for obtaining a difference voltage by a differential type operational amplifier, and is provided with detection temperature values TD1 and TD2 to obtain a difference voltage VT1. Pipe line 4 corresponding to heat exchanger 13
A voltage VT1 corresponding to the temperature difference between TD1 and TD2 on the inlet side and the outlet side.

Each of the voltage setting circuits SE1 and SE2 is a voltage dividing circuit using a variable resistor. As a plurality of reference values, corresponding portions in a state where the apparatus is operating, in this case,
The voltage S corresponding to 150% and 200% of the voltage SV1 corresponding to the regular temperature difference between the inlet side and the outlet side of the heat exchanger 13
V1A and voltage SV1B are set by operating the variable resistor.

Each of the comparison detection circuits CP1 and CP2 is a circuit for obtaining a voltage comparison output by a differential type operational amplifier, and converts a voltage VT1 corresponding to a temperature difference value into a voltage SV1A of each reference value.
・ SV1B · SV1A · S
When it exceeds V1B, the comparison output is obtained, and the comparison output CP1A when it exceeds 150%, which is the reference value of the abnormal stage, and the comparison output C when it exceeds 200%,
P2A is obtained and given to the logic circuit LG1.

The logic circuit LG1 is a circuit for obtaining a decoded output by a combination of an AND circuit and an OR circuit.
When neither of the comparison outputs CP1A and CP2A is present,
When the logical output LG1A, which is less than 150%, is a stationary signal, and there is only the comparison output CP1A,
When both the comparison outputs CP1A and CP2A have the logical output LG1B of 0% as a caution signal, and the logical output LG1C of 200% is exceeded as a warning signal, the display circuit P
Give to 1.

The display circuit DP1 is a combination circuit of an indicator lamp circuit based on color coding of LED elements and a buzzer alarm circuit, and turns on a green LED by a steady signal of a logical output LG1A to indicate that the LED is in a steady state. The yellow LED is turned on by the caution signal of the logical output LG1B to indicate that the caution state is set. Also, the logical output LG1
The red LED is turned on by the alarm signal of C to indicate that the vehicle is in a failure warning state, and the alarm circuit is sounded to alert the observer.

Although not shown in FIG. 5, the heat exchanger 13
Is the temperature detection value TD6 from the temperature detectors D6 and D7 arranged in the pipelines 12 and 14.
・ There is another set of TD7, and this temperature detection value TD6 ・ TD
It is needless to say that a circuit for processing the temperature detection values TD1 and TD2 in the same manner as described above is also provided for No. 7.

The other detection display units P2 to Pn have the same configuration and the operation is the same as that of the above-mentioned detection display unit P1, so that the description is omitted.

[Modification] The present invention can be modified as follows. (1) The processing in the detection display units P1 to Pn in the second embodiment is configured by processing by the CPU.

(2) The display circuit 60 in the first embodiment is configured as a raster display screen using a cathode ray tube or a liquid crystal, and the display for all the detection targets is displayed as a list.

(3) The number of abnormal steps is further increased.

(4) Each detection display section P in the second embodiment
The display circuits DP1 to DP1 are separately provided, and all the display circuits are collected and installed in one place, or are stored in one box and collected and displayed on the display panel surface.
It is configured so that the entire part can be monitored.

(5) In a configuration in which the operation can be switched between the cooling operation and the heating operation, a heating / cooling operation switching signal obtained based on a switch operation for switching or a command signal as shown in FIG. The CPU 50 is configured to switch each reference value for each temperature difference value between a reference value during the heating operation and a reference value during the cooling operation.

(6) CP controlling the operation of the apparatus
U and the CPU 50 are configured as one CPU.

[0062]

According to the present invention, as described above, even when the apparatus is performing the cooling operation or the heating operation, the location of the required pipeline between the heat operation fluid and the heat operation fluid is required. Based on each detected temperature value that detected only each temperature in, the abnormal state of each heat exchange device for all the heat exchange devices belongs to any of a plurality of pre-set abnormal stages. Since it is determined and displayed, it is possible to monitor the degree of the progress of the abnormality of each heat exchange device class with respect to all the heat exchange devices by this display, so that the occurrence of failure can be prevented beforehand. In addition to being able to perform maintenance operations, in the event of a repair in the event of a failure, the cause of the failure can be easily determined, and the repair can be performed efficiently.
In addition, since the monitoring configuration for monitoring all the heat exchange devices is configured to detect only each temperature at a required pipe location, there is a feature that the apparatus can be provided simply and inexpensively. is there.

[Brief description of the drawings]

FIG. 1 is a block diagram of a first embodiment of the present invention;

FIG. 2 is a block diagram of a main circuit according to the first embodiment;

FIG. 3 is a flowchart of a CPU according to the first embodiment;

FIG. 4 is a block diagram showing a second embodiment of the present invention;

FIG. 5 is a block diagram of a main circuit according to a second embodiment;

FIG. 6 is a block diagram of a conventional technique.

FIG. 7 is a specific block diagram of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Absorber 1A Sprayer 1B Cooling pipe 2a Dilute liquid 2b Intermediate liquid 2d Concentration 3 Pump 4 Pipe line 5 High temperature regenerator 6 Heater 7a Refrigerant vapor 7b Refrigerant vapor 7c Refrigerant vapor 7e Refrigerant vapor 8 Line 9 Heat exchanger 10 Tube Path 11 Low temperature regenerator 11A Radiator 11B Path 12 Pipe 13 Heat exchanger 14 Pipe 21 Pipe 22 Pipe 23 Condenser 23A Condenser 24a Refrigerant liquid 24b Refrigerant liquid 24c Refrigerant liquid 25 Pipe 26 Evaporator 26A Disperser 26B Evaporator 27 Pump 28 Pipe 28A Pipe 31 Pipe 32a Cooling water 32b Cooling water 33 Pipe 34 Pipe 34A Pipe 34B Pipe 35 Pipe 36a Cold water 36b Cold water for cooling 37 Pipe 41 Pipe 41A Opening / closing Valve 42 Pipe 42A On-off valve 43 Pipe 43A On-off valve 50 CPU 51 I / O port 52 Work data memory 3 Reference data memory 54 Processing memory 60 Display 70 Setting input circuit 100 Absorption refrigerator D1 to Dn Temperature detector TD1 to TDn Temperature detection value P1 to P7 Detection display section DV1 Difference voltage circuit SE1 Voltage setting circuit SE2 Voltage setting circuit CP1 Comparison detection circuit CP2 Comparison detection circuit LG1 Logic circuit DP1 Display circuit

──────────────────────────────────────────────────続 き Continuing on the front page (72) Hidekazu Nakajima 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Prefecture Inside Osaka Gas Co., Ltd. (72) Ryuichiro Kawakami 4-chome, Hirano-cho, Chuo-ku, Osaka-shi, Osaka No. 1-2 Inside Osaka Gas Co., Ltd. (72) Masahiro Furukawa 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Eiichi Enomoto 2-chome Keihanhondori, Moriguchi-shi, Osaka 18 Sanyo Electric Co., Ltd. (72) Yasushi Kamada 2--18 Keihanhondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Yoshio Ozawa 2-18 Keihanhondori, Moriguchi City, Osaka Prefecture (56) References JP-A-64-28456 (JP, A) JP-A-63-118571 (JP, A) JP-A-2-130363 (JP, A) JP-A-62-116871 ( P, A) JP flat 2-33577 (JP, A) (58 ) investigated the field (Int.Cl. ^7, DB name) F25B 15/00 306 F25B 49/02 570 F25B 49/04

Claims (2)

(57) [Claims] 1. A circulating system for circulating a heat operation fluid such as an absorbing liquid and a refrigerant liquid via a plurality of heat exchange devices, and cooling or heating via a required one of the heat exchange devices. An absorption refrigerator having a function of monitoring an operation state of the heat exchange devices, provided with a circulation path for circulating the heat-operated fluid that performs heating, wherein the heat-operated fluid and the heat-operated fluid are provided. Temperature detecting means for detecting only the temperature of a required pipe line in each of the transit points to obtain only the detected temperature values, and all the heat exchange devices obtained based on only the detected temperature values While converting each temperature difference value between the inlet side and the outlet side of each pipeline for each of the heat exchange equipment into a ratio value to a reference value set in advance for each pipeline, each of the ratio values is Belongs to any of a plurality of preset abnormal stages Abnormal stage determining means for determining whether or not each of the abnormal stages for which the determination has been obtained is displayed for each of the heat exchange devices for all of the heat exchange devices. Absorption refrigerator. 2. A circulating system for circulating a heat operation fluid such as an absorbing liquid and a refrigerant liquid via a plurality of heat exchange devices, and cooling or heating via a required one of the heat exchange devices. An absorption refrigerator having a function of monitoring an operation state of the heat exchange devices, provided with a circulation path for circulating the heat-operated fluid that performs heating, wherein the heat-operated fluid and the heat-operated fluid are provided. Temperature detecting means for detecting only the temperature of a required pipe line in each of the transit points to obtain only the detected temperature values, and all the heat exchange devices obtained based on only the detected temperature values The temperature difference between the inlet side and the outlet side of each pipe for each of the heat exchange equipment is compared with a plurality of reference values set in advance for each of the pipes in any of a plurality of abnormal stages. Abnormal stage determining means for determining whether or not the Display means for displaying each of said abnormal stages for each of said heat exchange devices for all said heat exchange devices.