JPH0641824B2 - Abnormal chiller operation abnormality notification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a device for reporting an abnormal operation of an absorption refrigerator, an absorption heat pump, an absorption chiller-heater (hereinafter referred to as an absorption refrigerator).

(B) Conventional technology An absorption refrigerator may cause various abnormal operations due to various causes such as overheating of the generator, freezing of cold water or refrigerant, or crystallization of absorbing liquid.

And as a conventional technique to prevent these abnormalities,
A thermostat is provided in the solution flow path, refrigerant flow path, cold water flow path, etc. of the absorption refrigerator, and when the fluid temperature in these flow paths exceeds the upper limit set value or falls below the lower limit set value, the heating of the generator may be stopped. Or, the absorption chiller that prevents crystals of absorption liquid, cold water, freezing of refrigerant, overheating of the generator, etc. by interrupting the steady operation of the absorption chiller, such as reducing the amount of cooling water supplied to the absorber. Protective device (for example, Japanese Patent Publication Sho 5)
1-20706, JP-B-52-49493, JP-B-58-32111, and JP-A-58-57.
No. 670, Japanese Utility Model Laid-Open No. 58-93754, etc.) are known.

(C) Problems to be solved by the invention In a conventional absorption refrigerating machine protection device, a thermostat works without warning of the possibility of occurrence of an abnormality or notification of the location of the abnormality. The operation of the absorption refrigerator will be automatically interrupted by stopping the heating of the generator. Therefore, the operation manager cannot easily know the location of the abnormality and cannot easily understand the cause of the operation interruption,
There was a problem that it was difficult to take effective measures.

In view of such a problem, the present invention can easily know a location where an abnormality occurs and a location where an abnormality may occur, and informs an operation abnormality for an absorption refrigerating machine that can facilitate effective measures. The purpose is to provide a device.

(D) Means for solving the problem The present invention, as a means for solving the above problems, solution temperature in the generator, vapor pressure, the liquid level and the temperature of the hot and cold water flow path, the physical quantity such as flow rate is detected And the signal from this detector, and when any of the physical quantities reaches the limit set value as an abnormal point, the heating device of the generator, pump for absorbing liquid, pump for cold soot and other drives A command signal for controlling the start / stop of the equipment to stop the normal operation of the absorption refrigerator, and a command signal for issuing a warning when the set value for warning before reaching the limit set value is reached. The time when any of the physical quantities reached the warning set value or the limit set value, the value of the physical quantity at that time, and the operating state of the drive device at that time, such as the on / off state, were stored as data in the storage element. Memorize this A controller that issues a command signal to present data (eg, print out), and a warning indicator (for example, a warning lamp or warning buzzer or printer) or data presentation that receives the command signal from this controller By connecting an indicator (for example, a printer or a display device) and a drive device for an absorption refrigerator (an absorption liquid pump, a cooling soot liquid pump, a burner, a fuel control valve or other control valve) through an interface, This is a configuration of an operation abnormality notification device of the absorption refrigerator.

(E) Action Since the device of the present invention has a structure in which the sensor, the controller, and the display for warning or data presentation are connected through the interface, the place where the abnormality occurs, the time when the abnormality occurs, and its time Operating condition of the driving equipment of
Demonstrate the function (action) that informs the operation manager as data of the value of physical quantity in a location where no abnormality has occurred, the location where an abnormality may occur, and the time when the location is approaching the occurrence of an abnormality. To do. Moreover, since the device of the present invention has a structure in which the sensor, the controller, and the drive device for the absorption refrigerating machine are connected to each other through the interface, if the abnormality occurs in any part of the absorption refrigerating machine, the drive device is driven. It also has the function of controlling the operation of the absorption refrigerator to stop the operation of the absorption refrigerator before a serious failure of the absorption refrigerator occurs.

With the above-described functions of the device of the present invention, the operation manager can easily know at a glance the operating conditions of each part of the absorption refrigerator before and after the occurrence of an abnormality, and based on this, the cause of the abnormality can be absorbed and frozen. It is also possible to analyze before the occurrence of a serious machine failure, and it is possible to take appropriate and effective measures against the occurrence of an abnormality.

(F) Embodiment FIG. 1 is a schematic configuration explanatory view showing an embodiment of an operation abnormality notification device for an absorption refrigerator according to the present invention. In FIG. 1, (A) is an absorption chiller-heater [absorption chiller], which is a high-temperature generator (1), low-temperature generator (2), condenser
(3), an evaporator (4), the absorber (5), the low-temperature solution heat exchanger (6), the high-temperature solution heat exchanger (7), a pump for the coolant (P _R), and a pump for the absorbing solution Pipe lines (8), (9), through which refrigerant flows through (P _A ),
Refrigerant liquid flowing down conduit (10), Refrigerant liquid refluxing conduit (1
1), (12), pipelines (13), (14), (15), (1
6), pipelines (17), (18) through which the intermediate concentration absorption liquid flows, the refrigerant (water) and the absorption liquid (lithium bromide aqueous solution) connected by the pipelines (19), (20) through which the concentrated absorption liquid flows Circulation circuit and water heater (21),
A refrigerant circulation path connecting the high temperature generator (1) with refrigerant vapor flowing pipes (8), (22) and a pipe (23) through which the refrigerant drain flows,
It has the same structure as the conventional absorption chiller-heater.

(24) is a combustion heating chamber of the high temperature generator (1), (25), (25) ... are heating tubes through which combustion gas flows, (26) is a flue, and (27) is a low temperature generator.
(2) heater, (28) condenser (3) cooler, (29) evaporator
(4) water cooler, (30) absorber (5) cooler, (31) water heater
The heat exchanger of (21), (32), (33) is a cold water pipe connecting the cold water load side heat exchange unit (not shown) and the water cooler (29), (34), (35) , (36) is a cooling tower (not shown), a cooler (3
0) and (28) are cooling water pipes connected in series, and (37) and (38) are hot water pipes that connect the heat exchanger (30) and the hot water load side heat exchange unit (not shown). . Further, (B) is a burner for the high temperature generator (1), (F) is a blower for the burner (B), (39), (4
Reference numeral 0) is a fuel supply path connecting the burner (B) and a fuel source (not shown), and an air supply path connecting the burner (B) and the blower (F).

(P _CW ) is a pump for cold water provided in the cold water pipe (32), (P _CW )
_HW ) is a pump for hot water provided in the hot water pipeline (37), (P _C )
Pump for cooling water provided in the cooling water pipe (36), (P _G)
Is a non-condensable gas extraction pump. Furthermore, (V _F) is a fuel control valve provided in the fuel supply passage _{(39), (V R)} , (V A),
(V _HR) each conduit (9), (14), a flow control valve provided in (23), (V _G) is the absorber (5) the gas phase and the extraction pump (P _G)
An on-off valve (V _B ) provided in a bleeding pipe line (41) connecting to the refrigerant line (42) is a refrigerant liquid blowing pipe line (42) connecting the pipe line (12) and the liquid reservoir of the absorber (5). This is an on-off valve.

(S _WT ) and (S _WF ) are temperature and flow rate detecting sensors provided in the cold water pipelines (33) and (32), and (S _CT ) and (S _CF ) are cooling water pipelines (34) and (SCF), respectively. 36) Temperature and flow rate detection sensors, ( _SHWT ), ( _SHWF ) are hot water pipes respectively
(38), temperature for (37), sensor for flow rate detection,
_{(S HGP), (S LGP} ), (S AP) each hot generator
(1), a low temperature generator (2), a pressure detecting sensor provided in the absorber (5), ( _SHGT ) is a temperature detecting sensor provided in the pipeline (9), (S _MRT ) is a pipeline ( The temperature detection sensor provided in (10), (S _LRT ) and (S _LRF ) are the temperature and flow rate detection sensors in (11) and (12) respectively, and (S _LAF ) is the line (1).
4) Sensor for flow rate detection, (S _LAT1 ),
(S _LAT2 ) and (S _LAT3 ) are pipelines (13), (15) and (16) respectively.
Temperature detection sensor provided _{in, (S MAT1), (S} MAT2),
(S _HAT1 ) and (S _HAT2 ) are pipes (17), (18) and (1
9), temperature sensor equipped with (20), (S _MAF ), (S
_HAF ) is a flow rate detection sensor equipped in the pipes (18), (20),
_{(S HGL), (S LGL} ), (S AL) each hot generator
A liquid level detection sensor provided in (1), the low temperature generator (2), and the absorber (5). Also, (Sgt) and (Srt) are the flue (26),
It is a sensor for temperature detection provided in the pipeline (23),
(S _HRL ) and (S _LRL ) are a condenser (3) and an evaporator (4), respectively.
Is a sensor for liquid level detection provided in the.

(D / O / C) is a controller, and this controller, keyboard (KB) and printer (P
R) and a lamp (LED) and the above-mentioned various sensors and pumps (P _R ), (P _A ), (P _CW ), (P _HW ), (P
_C), (P _G) and the valve _{(V A), (V R} ), (V HR),
_{(V F), (V G} ) and the burner (B), the drive device and an interface, such as a blower _{(F) (I / F S} ), (I /
F _KB ), (I / F _{O · C} ), (I / F _{L · PR} ) to connect the absorption chiller / heater [absorption chiller] operation abnormality notification device (hereinafter referred to as this device) Is configured.

FIG. 2 is a block diagram of the present apparatus shown in FIG. In FIG. 2, the controller (D ・ O ・
Input interface C) is receiving the analog signals from the various sensors (I / F _S), CPU [Central Processing Unit], ROM (read only memory], RA
M (random access memory), keyboard (KB)
Input interface (I
/ F _KB ), clock (CLOCK), lamp (LED) as a warning display, and output interface (I / F _{L / PR} ), which sends digital signals to the printer (PR) as a data display. computer components, such as output interface for sending the analog or pipe signal (I / F O _{· C)} to the valve and the pump and the burner are built.

In the RAM built in the controller (DOC), the limit set value as an abnormal point of each physical quantity sensed by various sensors by the operation of the keyboard (KB) and a warning before reaching the limit set value. The preset value for use is stored in advance. In addition, the RAM stores various values of various physical quantities as data in response to signals from various sensors.

When one of the physical quantities sensed by the sensor reaches the warning set value, the signal input from the sensor to the controller (DOC) is sent to the CPU, ROM, R
Access is made between AMs, and the controller (D • O • C) issues a command signal for warning to the lamp (LED). Further, when any of the physical quantities sensed by the sensor reaches the limit set value, the signal input from the sensor to the controller (D / O / C) is sent to the CPU and R.
Access between OM and RAM to access the controller (DO
・ From C), command signals for controlling the operation of pumps and burners are transmitted. Moreover, when any of the physical quantities sensed by the sensor reaches the warning set value or the limit set value, the controller (DO
C) is CPU, ROM, RAM, clock (CLOCK)
While accessing the signals between the two, the time when the warning set value or the limit set value is reached and the operating state such as the on / off state of the pump, burner and other driving equipment at that time are read.
It is stored as data in AM, and this data and R
The printer (PR) sends a command signal to the printer (PR) for making a table with the data of various physical quantities stored in the AM and the data at the above-mentioned time.

Next, an operation example of the operation abnormality notification device for an absorption refrigerator (hereinafter referred to as the present device) configured as described above will be described.

FIG. 3 shows the fuel control valve (V
_F ) and the flow control valve ( _VA ), the control command operation by this device, the command operation by this device for the lamp (LED) as a warning indicator, the absorption liquid pump (P ₆ is a flow chart showing an example of the operation of the present apparatus such as the start / stop instruction operation by the present apparatus for _A ) and the burner (B) and the instruction operation by the present apparatus for the printer (PR). The programs for these command operations are stored in the ROM of the controller (D / O / C).

During operation of the absorption refrigerator (A), the high temperature generator (1)
When the liquid level in the inside begins to drop and the liquid level reaches the set value for warning, if this is left as it is, the liquid level will drop further and the liquid level will be below the limit set value, and eventually the high temperature generator
You will fall into the empty heating of (1). In such a case, the controller (D ・ O ・ C) of this device is
_{By accessing} the signal from _HGL ) between CPU, ROM and RAM, it is judged whether the liquid level of the high temperature generator (1) has reached the lower limit warning set value stored in RAM in advance. First, the operation of the step of performing is performed. In this case, since the liquid level has reached the lower limit warning set value, the determination of the stage is YES. Then, the controller (D
O and C) perform the operation of issuing a command signal for operating the lamp (LED) as a warning display, and the red lamp is turned on. On the other hand, when the liquid level has not dropped to the lower limit warning setting value, the determination of step is NO, and the operation of step is repeated.

Although not shown in the flowchart of FIG. 3,
During operation of the absorption refrigerator (A), the controller (D • O • C) of this device receives signals from the sensor ( _SHGL ) and other sensors, and sends them to the CPU and RO.
By accessing between M, RAM, and clock (CLOCK), the momentary value of the physical quantity detected by the sensor is stored in RAM.
The data is stored in the backup area of [the part where the power supply at the time of power failure is backed up by the battery] as data, and this data is sequentially accumulated. Further, during the suspension of the operation of the absorption refrigerator (A), the power of this device is normally off and the controller (D / O / C) does not operate, so that data is not stored in the RAM. However, while the absorption chiller (A) is not in operation, the power of this device is turned on to activate the controller (D ・ O ・ C), and the already stored data can be printed out by the printer (PR). It is possible.

Simultaneously with the stage of operation is performed lamp (LED) is lit, the step of issuing a control command signal to the controller of the device (D · O · C) is a fuel control valve (V _F) and the flow control valve (V _A) performs the operation, the opening degree of the fuel control valve flow control valve while opening is reduced in (V _F) (V _a) is increased. Further, by accessing the control command signal, the data and while storing and opening of transmission time and the fuel control valve of the control command signal (V _F) and the flow control valve (V _A) as data in the RAM The operation of the step of issuing a command signal to the printer (PR) to print out the data [data of various physical quantities] to the printer is performed. Then, the operation of printing out these data as a table from the printer (PR) is performed.

And the controller (D ・ O ・ C) of this device is
After performing the operations of the steps almost at the same time, the operations of the steps of determining whether or not the liquid level of the high temperature generator (A) becomes larger than the lower limit warning set value are performed. When this determination becomes the determination of YES, that, the fuel control valve opening is reduced the flow rate control valve (V _F) (V _A) for the liquid surface by the opening is increased is the lower limit of the warning When the liquid level rises above the set value, the operation of the step of releasing the operation command of the lamp (LED) is performed, the red lighting of the lamp (LED) is extinguished, and the operation returns to the step determination operation again. on the other hand,
When the judgment of the stage is NO, that is, when the liquid level of the high temperature generator (1) does not rise even after controlling the opening of the valve, the liquid level reaches the lower limit limit value. The operation at the stage of determining whether or not the operation is performed is performed.

When the stage of determination becomes determined NO, the further increase command the opening of the controller (D · O · C) is a fuel control valve (V _F) flow control valve opening at further reducing one of (V _A) The operation of the step of issuing a signal is performed, and the operation returns to the step of judging. When the result of the step operation is YES, the controller (D • O • C) performs the operation of the step of issuing the stop command signal of the burner (B) and at the same time as the transmission time of this stop command signal. that time of the fuel control valve (V _F) and the flow control valve (V _a) opening and the burner (B) sensed physical quantity other absorption refrigerating machine driving device of the on and off states and various sensors other valves such The operation state of the absorption refrigerating machine is stored in the RAM as data, and a command signal for printing out these data in a table is issued to the printer (PR). By performing the operation in stages, the heating of the high temperature generator (1) is stopped, the refrigerating operation of the absorption refrigerator (A) is stopped, and the so-called absorption liquid dilution operation is started. Further, by performing the operation in stages, the operation manager is notified of the stop time of the refrigerating operation, the values of various physical quantities at that time, and the operating state of the absorption refrigerator (A).

And the controller (D ・ O ・ C) of this device is
Phase of operation after a prescribed time (e.g. 20 minutes) performs a counting of [phase of operation], further 20 minutes count after burner (B) other than the absorbing liquid pump of (P _A) and the cold water pump (P _CW) The operation at the stage of issuing a command signal for stopping the driving device for the absorption refrigerating machine, etc. is also performed. By performing the operation in stages, the dilution operation for 20 minutes is completed and the operation of the absorption refrigerator (A) is completely stopped.

As described above, this device automatically stops the operation of the absorption chiller (A) and the function of notifying the operation manager when the liquid level of the high temperature generator (1) drops abnormally. High temperature generator
It exerts the function of preventing (1) dry heating. In addition, this device also has a function of storing the operating state of the absorption refrigerator at the time of abnormal liquid level drop and the values of various physical quantities and displaying them, which is useful for analyzing the cause of abnormal liquid level drop. . It should be noted that this device exerts a function of notifying even when the liquid level of the high temperature generator (1) rises abnormally, and, contrary to when the liquid level drops, the flow control valve ( _VA ). To stop the freezing operation of the absorption chiller (A) by stopping the operation of the absorption liquid pump (P _A ) and then from the high temperature generator (1) to the pipelines (8), (9).
Of course, the function of preventing the absorption liquid from overflowing to the condenser (3) via it is also exerted. In addition, of course, it has a function of recording the operating state at the time of abnormal liquid level rise and various physical quantity values and displaying them, which is useful for analysis of the cause of abnormal liquid level rise.

Note also, the apparatus includes a pressure detecting sensor (S _HGP) is not limited to the liquid level detection sensor (S _HGL), a temperature sensor for detecting (Sgt), (S _MAT1) signals, such as the controller (D · O · C) CPU, ROM, RAM, clock (CL
OCK) to access the high temperature generator (1)
Of course, it also has the function of reporting abnormalities such as excessive pressure rise and pressure drop, temperature rise and temperature drop.

Furthermore, this device is not limited to the function of notifying the abnormality of the high temperature generator (1), but it is possible to access the signals of the temperature detection sensor (S _WT ) and the flow rate detection sensor (S _WF ) so that the chilled water becomes excessive. A function to notify of abnormalities such as temperature drop and temperature rise (for example, fear of freezing of cold water or loss of refrigeration capacity),
Function to notify abnormalities such as overheating or insufficient heat of hot water by accessing the signal of temperature detection sensor ( _SHWT ), Absorption refrigerator (A) by accessing the signal of pressure detection sensor ( _SAP ) Of course, it also has a function of notifying various abnormalities such as a function of notifying an abnormal increase in the non-condensable gas inside.

Then, this device reports these various abnormalities, and at the same time, manages the operating state of the absorption chiller, such as the valve opening at the time of abnormalities, the on / off state of the drive equipment and the physical quantity sensed by various sensors, as data. Has the function of presenting to the person. In addition, this device stops normal operation of the absorption chiller by stopping the pump for cooling water or stopping the operation of the burner when an abnormality occurs such as the possibility of freezing of cold water or the possibility of emptying of the generator. It has the function of stopping the operation, and has the function of stopping the operation of the absorption refrigerator before the serious failure such as the rupture of the cold water pipe or the damage of the generator is prevented.

FIG. 4 is a chart showing an example of data on the location of an abnormality, the time of occurrence of the abnormality, and the operating state of the drive equipment controlled in accordance with the occurrence of the abnormality. In the data example of FIG. 4, 1985
Hot generator October 30 14:00 39 minutes 5 seconds liquid level (1) is reduced to the warning set value, the opening degree of the fuel control valve (V _F) is controlled to be 25%, rare It is displayed that the opening degree of the flow rate control valve (V _A ) for the absorbing liquid is controlled to be 75%.

FIG. 5 is a table showing a data example of the time when the normal operation [refrigeration operation] of the absorption refrigerator is stopped due to the occurrence of an abnormality and the state of the absorption refrigerator at that time. In the data example of Fig. 5, at 14:49:32 on October 30, 1985, the liquid level of the high temperature generator (1) dropped excessively and the liquid level fell to the limit set value. By burner (B)
Is stopped and heating of the high temperature generator is stopped, and the state of the absorption chiller such as the on / off state of the drive equipment, the opening degree of the valve and the values of various physical quantities at this time are displayed.

Then, the operation manager or the service person can find the cause of the liquid level drop of the high temperature generator by analyzing these data.

(G) Effect of the invention As described above, the device of the present invention, the location of the abnormality during the operation of the absorption refrigerator, the time of occurrence of the abnormality, the operating state of the drive equipment at that time, the location of the abnormality and other Since it has the function of notifying the operation manager of the values of physical quantities such as temperature, flow rate, and pressure at the location as data, the abnormal location can be identified at a glance more accurately than the conventional protective device or safety device without this function. The effect of being able to know is brought about, and the effect of being able to know the cause of abnormality more accurately is brought about.

Therefore, it becomes possible to take more appropriate and effective measures against the occurrence of abnormalities, it is possible to accurately prevent a serious failure of the absorption refrigerator, and it is possible to use the absorption refrigerator safely and economically for a long period of time. Become.

[Brief description of drawings]

FIG. 1 is a schematic configuration explanatory view showing an embodiment of the device of the present invention, FIG. 2 is a block diagram showing an example of the device of the present invention, and FIG. 3 is a flow chart showing an operation example of the device of the present invention. 4 and 5 are charts showing examples of data printed out by the apparatus of the present invention. (A) …… Absorption refrigerator, (D ・ O ・ C) …… Controller, (PR) …… Printer, (LED) …… Warning lamp, (1) …… High temperature generator, (2) …… Low temperature generator, (3) ...
… Condenser, (4) …… Evaporator, (5) …… Absorber, (B) …… Burner, (P _R ), (P _A ), (P _C ), (P _G ),
(P _CW ), (P _HW ) …… Pump, (F) …… Blower,
(V _F) ...... fuel control valve, (V _B) ...... off valve,
(V _A ), (V _R ), (V _HR ) ... Flow control valve, (KB)
…… Keyboard, (V _G ) …… _{Open /} close valve, (S _HGL ), (S
_LGL ), (S _AL ), (S _HRL ), (S _LRL ) ... Liquid level detection sensor, (S _HWF ), (S _WF ), (S _CF ),
(S _LAF ), (S _MAF ), (S _HAF ), (S _LAF ) ... Flow rate detection sensor, (S _HGP ), (S _LGP ), (S _AP ) ...
Sensor for pressure detection, (S _HWT ), (S _WT ),
(S _CT ), (S _LAT1 ), (S _LAT2 ), (S _LAT3 ), (S
_{MAT1), (S MAT2),} (S HAT1), (S HAT2), (S
_HRT ), (S _MRT ), (S _LRT ), (Sgt), (Srt) ...
Temperature sensor, (CPU) Central processing unit, (I / F _S ), (I / F _KB ), (I /
_{FL / PR} ), (I / F _{O / C} ) ... Interface.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuo Sakata 180 Sakata, Oizumi-cho, Oura-gun, Gunma Higashi Kyosan Electric Co., Ltd. (72) Takaki Iwatani 180 Sakata, Oizumi-cho, Oura-gun, Gunma Prefecture Tokyo Sanyo Electric Co., Ltd. (72) Inventor Gou Ishikawa 180 Sakata, Oizumi-cho, Gunma-gun Osamu, Higashi Kyoyo Sanyo Electric Co., Ltd. (72) Inventor Kazuo Matsumoto 2-18 Keihanmoto-dori, Moriguchi City, Osaka Sanyo Electric Incorporated (72) Inventor Masayasu Ezaki 2-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Masahiro Maekawa 2-18-2 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. ( 56) Bibliographic references Sho 61-162766 (JP, U) Japanese Patent Sho 45-1034 (JP, B1)

Claims (1)

[Claims] 1. A detector for detecting a physical quantity such as a solution temperature in a generator, a vapor pressure, a liquid level, a temperature of a hot / cold water channel, and a flow rate,
When a signal from this detector is received and one of the physical quantities reaches the limit set value as an abnormal point, the heating device of the generator, pump for absorbing liquid, pump for cold soot, and other driving devices are stopped. To output a command signal for stopping the normal operation of the absorption refrigerator, and when issuing a warning set value before reaching the limit set value, a command signal for issuing a warning, and a physical quantity The time when any of the values reached the warning set value or the limit set value, the value of the physical quantity at that time, and the operating state such as the on / off state of the driving device at that time are stored as data in the storage element, and these data are stored. A controller that issues a command signal to present a message and a warning or data display device that receives a command signal from this controller and a drive device are connected via an interface. Absorption chiller operation abnormality notification apparatus characterized in that it is.