JPH0745996B2 - Oil replacement time notification device for extraction pump for absorption refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a device for informing an operation manager of an oil replacement timing of an absorption refrigeration air extraction pump.

(B) Conventional technology In absorption chillers, absorption heat pumps, absorption chiller / heaters, etc. (hereinafter referred to as absorption chillers), the non-condensable gas is removed from the machine by operating the extraction pump of the non-condensable gas that accumulates It is generally practiced to exhaust air to maintain good performance of the absorption refrigerator. It is generally known that the extraction pump also extracts the refrigerant vapor [for example, steam] together with the non-condensable gas in the absorption refrigerator, so that the oil used for the extraction pump gradually deteriorates depending on the operating time of the extraction pump.

For this reason, the maintenance and inspection of the extraction pump has been conventionally performed by regularly changing the oil (eg, every month) [(Incorporated Association) issued by the Japan Refrigeration and Air Conditioning Industry Association (Revised February 1982, 1st edition).
Edition) "Correct operation method of gas absorption chiller / heater / absorption chiller" (see pages 53 to 58).

(C) Problems to be solved by the invention In the above-mentioned conventional maintenance inspections, uniform regular inspections are performed regardless of whether the extraction pump is used frequently or not, so it is not always necessary to change oil. There was a problem that it was not done at a certain time. That is, in the former case, the oil replacement time is too late, while in the latter case, the oil replacement time is too early and the oil that can be used is replaced at the end.

For this reason, there is a method of manually selecting the appropriate oil change timing by manually recording the usage frequency and usage time of the bleeding pump, but this method has a problem that it takes too much time for the operation manager. In addition, in an absorption refrigeration machine equipped with an automatic bleeding device that automatically operates the bleeding pump by sensing the pressure inside the machine with a sensor, it is true that the number of times the bleeding pump starts and stops and the operating time are accurately recorded manually. It has a problem that the above is almost impossible.

In view of such a problem, the present invention integrates the operation time of the extraction pump instead of manually, and when the integrated operation time reaches the operation time that requires oil exchange of the extraction pump, the operation manager indicates that fact. The purpose is to provide a device that can inform the user.

(D) Means for Solving Problems As a means for solving the above problems, the present invention provides an operation command unit for instructing start / stop of the extraction pump, and a bleed pump pump receiving a signal from the operation command unit. While accumulating the operating time
With a built-in comparison unit of a computer that compares the set operating time stored in a storage element such as RAM (random access memory) or magnetic tape and the storage element in advance and the accumulated operating time with each other, When it is determined by the comparison unit that the integrated operating time has become larger than the set operating time, a signal issued from the comparing unit is received and a notification unit notifying that the oil of the extraction pump needs to be replaced is provided via an interface. Is connected to form an oil exchange timing notification device for the absorption chiller extraction pump.

(E) Action The device of the present invention exerts the function (action) of instructing the start / stop of the extraction pump in place of the human being by the operation command unit and the function of recognizing the start / stop, and the comparison is performed based on this function. The function of accumulating the operation time of the extraction pump by the computer of the section and exerting the function of determining whether or not this integrated operation time has reached the set operation time, that is, the operation time that requires oil exchange of the extraction pump, and also the integration operation When the time reaches the set operation time, the alarm unit notifies the operation manager of the message that the oil of the extraction pump needs to be changed.

With the above-described functions of the device of the present invention, the operation manager or service person can perform oil exchange of the absorption refrigeration pump for the extraction refrigerator without waste, and maintenance of the extraction pump can be performed easily and rationally. .

(F) Embodiment FIG. 1 is a schematic configuration explanatory view showing an embodiment of an oil replacement timing notification device for an absorption refrigeration air extraction pump according to the present invention. In FIG. 1, (A) is an absorption refrigerator, which is a high temperature generator (1), a low temperature generator (2), a condenser (3), an evaporator (4), an absorber (5). ), The low temperature solution heat exchanger (6), the high temperature solution heat exchanger (7), the refrigerant liquid pump (P _R ) and the absorption liquid pump (P _A ) through which the refrigerant flows (8), ( 9), the pipeline (10) through which the refrigerant liquid flows,
Pipe lines (11) and (12) through which the refrigerant liquid recirculates, pipe lines (13), (14), (15) and (16) through which the absorption liquid is sent and pipe lines (17) and (18) through which the absorption liquid flows. ), (19), and (20) form a circulation path for the refrigerant [water] and the absorption liquid [lithium bromide aqueous solution] similar to those of the conventional absorption refrigerator.
(21) is the combustion heating chamber of the high temperature generator (1), (22), (2
2) ... is a heating pipe through which combustion gas flows, (23) is a flue for flue gas, (24) is a heater of a low temperature generator (2), (2)
5) and (26) are coolers of the condenser (3) and the absorber (5), respectively, and (27) is a heat exchanger built in the evaporator (4). (28) is the combustion heating chamber (2) of the high temperature generator (1)
1) to the fuel supply passage for guiding the fuel, this fuel supply passage are provided with flow control valve (V _F) it is. (29), (30), (31)
Is a pipe for cooling water in which coolers (26) and (25) are connected in series, and (32) and (33) are a heat exchanger (27) and a load side heat exchange unit (not shown). It is a pipe for cold water or hot water that is tied. When a plurality of load side heat exchange units are installed, the pipe lines (32) and (33) are mother pipes. Also, (3
Reference numeral 4) is a pipe line connecting the body of the evaporator (4) and the absorber (5) and the pipe line (8), and this pipe line is provided with a cold / hot switching valve (V ₁ ). And again, (35) is a pump (P _A ).
Of the discharge side of the pipe (14) and the liquid reservoir of the evaporator (4) are connected, and (36) is a pipe connecting the pipe (17) and the lower part of the absorber (5), These pipes (35) and (36) are also equipped with cold / hot switching valves (V ₂ ) and (V ₃ ), respectively. When the cold water supply to the load side heat exchange unit is switched to the hot water supply, these cold temperature change valves (V ₁ ), (V ₂ ), (V ₃ )
By switching from closed to open, the refrigerant vapor from the high temperature generator (1) flows to the evaporator (4) and its heat exchanger (27)
The heat of water in the heat exchanger (27) is raised by the latent heat of condensation of the refrigerant vapor at, and the boiling temperature is lowered by diluting the absorbing liquid with the refrigerant liquid to increase the thermal efficiency of the high temperature generator (1). ing. In addition, (P _G ) is a non-condensable gas extraction pump,
(37) is a refrigerant blow pipe line with a valve (V _B ). In addition, (B) is a burner, (P _W ) is a pump for cold and hot water,
(P _C ) is a cooling water pump.

(S _GT ) is a solution temperature detection sensor provided on the outer wall of the high temperature generator (1), (S _GP ) is a vapor pressure detection sensor provided in the gas phase part of the high temperature generator (1), (S _GL ) Is a sensor for liquid level detection provided on the upper side of the high temperature generator (1), (S _WT ).
Is a sensor for detecting cold water (warm water) temperature provided on the wall of the pipe (33), (S _WF ) is a sensor for detecting flow rate of cold water [hot water] provided in the pipe (33), and (S _RT ) is an evaporator (4 ) Is a sensor for detecting the temperature of the refrigerant liquid provided on the side wall of the bottom part of FIG. Also (S _AP )
Is a pressure detection sensor provided in the absorber (5).

(D / O / C) is a control unit as an operation control panel of the absorption refrigerator (A). In this control unit, a central processing unit (CPU), an input interface (I / F _S ), (I / F _S )
(F _KB ), output interface (I / F _L.PR ), (I / (F
_OC ) and other computer parts are built in.

(LCD) is an alarm, (PR) is a printer, and (KB) is a keyboard.

And the above sensors (S _GT ), (S _GP ), (S _GL ), (S
_WT ), (S _WF ), (S _RT ), (S _AP ), the control unit (D / O / C) of the absorption chiller (A), and the alarm (LCD),
A printer (PR) and a keyboard (KB) are electrically connected (or connected together with an optical communication cable) to provide an oil change timing reporting device for an extraction refrigerator extraction pump.

Although not shown in FIG. 1, the control unit (D / O /
C) also receives signals from sensors other than the above sensors, and these signals are accessed between the sensor, the central processing unit (CPU), the printer (PR), and other computer parts. The changes in the physical quantities sensed by the printer are printed out as operating data on a printer (PR).

Furthermore, the control unit (D / O / C) of the absorption refrigerator (A)
Is the same as the conventional one, the fuel control valve (V _F ) opening adjustment, pump (P _R ), (P _A ), (P _W ), (P _C ), and (P _G ) discharge amount adjustment Also, the start / stop, the start / stop of the burner (B), the opening / closing of the cold / hot switching valves (V ₁ ), (V ₂ ), (V ₃ ) and the like are performed.

FIG. 2 is a block diagram of the oil change timing reporting device for the extraction pump shown in FIG. In Fig. 2, the control unit (D / O / C) of the absorption chiller (A) receives the input interface (I / F _S ) that receives the analog signal from the sensor and the digital signal from the keyboard (KB). Input interface (I / F _KB ), output interface (I / F _L.PR ) that outputs digital signals to the alarm (LCD) and printer (PR), output that outputs digital or analog control signals to valves, pumps, etc. Interface (I / F _OC ), read only memory (ROM), random access memory (RAM), clock (CLOCK) are built-in. A keyboard (KB), a printer (PR), and a notification device (LCD) may be built in the control unit (D / O / C).

Then, by operating the keyboard (KB) and accessing signals between the input interface (I / F _KB ), the central processing unit (CPU), and the read-only memory (ROM), the pump (P _R ) , (P _A ), (P _W ),
(P _C ) and extraction pump (P _G ) and burner (B)
Random access memory (RAM) stores the start / stop conditions of each driving device in advance, and the data enters from the sensor to the central processing unit (CPU) via the input interface (I / F _S ). When any of the signals meets the above-mentioned start / stop conditions, the signal is issued between the central processing unit (CPU), read-only memory (ROM) and random access memory (RAM) The access signal at the time when the stop condition is met is stored in the random access memory (RAM) as operation command information [set], and this signal is output. The start / stop condition is met via the interface (I / F _OC ). The control unit (D
・ O ・ C) is equipped. In other words, the control unit (D / O / C) has a function of recognizing which of the driving devices starts and stops.

Moreover, the control unit (D / O / C) sets a signal matching the start / stop condition in the random access memory (RAM) as described above, and further, the central processing unit (CPU) and the clock ( CLOCK) to access signals while counting the time from the operation start to the operation stop of the driving equipment that matches the starting and stopping conditions and calculate the operating time for each starting and stopping of this driving equipment and The number of starts and stops is added up and stored in random access memory (RAM) as data. Then, the control unit (D / O / C) inputs a signal from a stop switch (not shown) for the absorption refrigerator (A) provided therein or an operation signal of a keyboard (KB) as an input interface (I / F). When this signal is received via _KB ), this signal is accessed between the central processing unit (CPU), read only memory (ROM), random access memory (RAM), and random access memory (RAM). The data stored in the table is made into a table or graph, and a signal for printing out by the printer (PR) is _sent to the printer (PR) via the output interface (I / F _L.PR ).

In addition, the random access memory (RAM) can be operated by the keyboard (KB) to operate the pump (P _R ), (P _A ),
(P _W ), (P _C ), (P _G ) set operation time that requires disassembly and inspection, extraction pump (P _G ) oil replacement set operation time, burner (B) and other equipment maintenance inspection The required set operating time and the like are stored in advance. Then, the control unit (D / O / C) performs random access /
Memory (RAM) pump is stored as data in the _{(P R), (P A} ), (P W), (P C), (P G) and the burner (B) respectively integrated operating time of the drive devices such as And the set operation time previously stored in the random access memory (RAM), the central processing unit (CP
U), Read Only Memory (ROM), Random
By accessing the signal between the access memory (RAM), the drive that reaches the size of the alarm (LCD) when any of the integrated operating time exceeds the set operating time while comparing A signal for indicating the necessity of overhauling the equipment, oil change, or maintenance inspection is _sent to the alarm (LCD) via the output interface (I / F _L.PR ).

Next, referring to the flow chart of the program shown in FIGS. 3 to 5 for an operation example of the oil change timing notification device (hereinafter referred to as the present device) of the extraction refrigerator extraction pump configured as described above, explain. These programs are stored in the read only memory (ROM) of the control unit (D / O / C).

In the following description, the input interface (I / F _S ) that receives the analog signal from the sensor, the input interface (I / F KB) that receives the digital signal from the keyboard ( _KB ), and the alarm (LCD) Output interface (I / F _L.PR ) that transmits digital signals to the printer (PR),
Output interface (I / F _OC ) that transmits digital or analog control signals to valves, pumps, burners, etc., central processing unit (CPU), read only memory (ROM), random access memory (RAM),
Set the clock (CLOCK) and alarm (LCD) to (I /
F _S ), (I / F _KB ), (I / F _L.PR ), (I / F _OC ), (CP
Described as (U), (ROM), (RAM), (CLOCK) and (LCD).

Further, the absorption refrigerating machine (A) control unit (D.
In (RAM) of O / C), set values of various physical quantities that are the start / stop conditions of each drive device [for example, the lower limit of the cold water temperature in the pipe (33) that is the stop condition of the burner (B)] Value, the conduit (3
3) the cold water temperature setpoint, the high temperature generator is the stop condition of the absorbent pump (P _A) (1) the upper liquid level, the high-temperature generator is the stop condition of the burner (B) (1) The lower limit liquid level, the re-start condition of the absorbing pump (P _A ) and the burner (B), which are the set liquid level in the high temperature generator (1), and the start condition of the extraction pump (P _G ). absorber (5) in the upper limit pressure, and to store the timer setting time, etc.] is re-stop condition of the bleed pump (P _G). In addition, for the above (D ・ O ・ C), the set operating time (eg 10,000 hours) that requires disassembly and inspection of the pump for absorbing liquid (P _A ), the pump for refrigerant liquid (P _R ) and other pumps pump (P _G) of oil change setting operation time required [for example, 20 hours], thereby stores a burner (B) of the maintenance setting operation time required [for example, 5,000 hours].

FIG. 3 is a flow chart showing an example of a start / stop command (operation command) operation by this device for the extraction pump which is one of the drive units for the absorption refrigerating machine, and FIG. 4 is a start / stop number [operation number] of the extraction pump. FIG. 5 is a flow chart showing an example of the operation of integrating the operating time and the operation time of the present apparatus, and FIG. 5 is a flow chart showing an example of the operation of notifying the oil exchange timing of the extraction pump by the present apparatus. It is a chart showing a display example of a message to the effect that the oil of the bleeding pump needs to be changed by the alarm device and the printer of this device.

In the command operation in the flow chart of FIG. 3,
Regardless of whether or not the absorption refrigerator (A) is in operation, the control unit (D / O / C) of this device first receives the signal from the pressure detection sensor ( _SAP ) and then the absorber. The pressure in (5) is the upper limit set value stored in (RAM) in advance (for example, 12 mmH
g) Perform the operation of the step of determining whether or not the above. When the absorber (5) pressure is at least the upper limit set value, the determination of step is YES, the excisional command information extraction pump (P _G) ON to (RAM) [stores] Phase of operation is carried out, further, conveys the bleed pump (P _G) via outputs a command signal of the bleed pump (P _G) ON Interferon chair (I / F _OC) A phased operation is performed and the pump begins to operate. Next, the control unit (D / O / C) is (CPU), (ROM),
Counts one hour while accessing signals between (RAM) and (COLCK) After performing the operations of steps, it performs the operation of the step of extraction pump which has been stored in the (RAM) (P _G) reset [de] command information to ON, further extraction pump (P _G) command signal OFF To this pump Perform the step operation. That is, the bleed pump (P _G) is 1
After being driven for hours, it was stopped. In the stage determination operation, when the pressure in the absorber (5) is less than the upper limit set value, the stage determination is NO, and the stage and And the stage of operation is performed bleed pump (P _G) will remain suspended. And After the performed phase of operation [Operation for transmitting a command signal extraction pump (P _G) OFF], again, the absorber (5) out of the operation pressure is equal to or greater than or equal to the upper limit set value in Return to. By such an operation is repeated, start-stop of the extraction pump (P _G) is Kukaee, noncondensable gas in the absorption refrigerating machine (A) is being discharged to the outside.

In the integrated operation of the start-stop count [operating frequency] and operating time of the extraction pump (P _G) in the fourth diagram of the flow chart,
For example by operating the keyboard (KB) at the time of installation of the absorption refrigerating machine (A), the by excisional the operating frequency [start-stop times] N and the operating time T of the bleed pump (P _G) to the respective zero (RAM) The operations of <1> and <2> to be stored are first performed. This memory is set in a portion of the (RAM) area that is backed up by the battery (hereinafter referred to as a back up area). Then, another portion in the bleed pump (P _G) ON area of (RAM)
Command information is stored in [Fig. 3 The operation of step <3> is performed. If the determination in step 3> is NO, the operation in this step is repeated. Conversely, if YES,
Move to the <4> stage operation. In the operation of <4> stage,
(CPU) adds 1 to the number of operations N [N = 0]
= N + 1] as new information is stored in the backup area of (RAM). That is, the information that the operation number 1 bleed pump (RAM) is (P _G) is stored as data. Then, the (CPU) performs the operation of <5> stage for counting the time for one second, and then performs the operation of <6> stage. <6> In the operation of the step, (CPU) which by adding 1 to the operating time T of the bleed pump (P _G) [T = 0] is [T
= T + 1 = 0 + 1] as new information in the backup area of (RAM). That is, the information that the operation time for one second of the absorbent pump in (RAM) (P _A) is stored as data. After the operation of <6> stage,
Operation determines whether command information extraction pump (P _G) ON is stored in the (RAM) [<7> phase of operation] is performed. If the determination at the <7> stage is YES, the operation moves to the <5> stage again, the operations at the <5> to <7> stages are repeated, and the storage of the backup area in (RAM) is T =
Can be sequentially rewritten as 1, 2, 3, .... That is,
If the operation of the extraction pump (P _G) is continued, it being stored as data on the operation time (RAM).
On the other hand, <7> If the determination at step is NO [command information extraction pump (P _G) ON is commanded pump (P _G) OFF with erased from the storage outgoing <third view of (RAM), If is step operation reference> is the operation of the extraction pump (P _G) is stopped], back to <3> stage of determination operation.

Then, the command information extraction pump (P _G) ON again (RAM)
When stored in, in other words, when the pump (P _G) is a command ON outgoing pump (P _G) is re-actuated, <3> stage of the determination is YES, the re <4> phase of operation Move. In the operation of the <4> stage at this time, since the information of N = 1 is already stored in the backup area of (RAM), the (CPU) adds 1 to this N [N = 1] and [N = N + 1 = 1 + 1 = 2] as new information (RA
It will be stored in the backup area of M). That is, the information that the number of operations a second bleed pump (RAM) is (P _G) is stored as data. afterwards,
The operations in the <5>, <6>, and <7> stages are performed in the same manner as the previous time, and the operating time at the second operation of the extraction pump (P _G ) is added to that at the first operation, and the back-up of (RAM) is performed. It is stored as new information in the up area and the total operating time is stored as data in (RAM). The <3> to <7> phase of operation per start-stop of the extraction pump (P _G) is repeated, 1 N in the operation of the <4> stage,
2,3 is recorded as the number of operations of the data extraction pump-back up-area are rewritten sequentially into _{...... (RAM) (P G)} .

In this way, the operating frequency for each start-stop is recorded in the total operated time of integrating the apparatus of the extracted pump (P _G) while being recorded in the apparatus of the extracted pump (P _G) Of. In this device, the number of operating times and operating time of the refrigerant liquid pump (P _R ) and other pumps are similarly set as follows.
Record. [For example, in the case of a pump for refrigerant liquid, the extraction pump in the flow chart in FIG. 4 may be rewritten as a pump for refrigerant liquid. ].

Then, the number of times the pump has been operated and the operating time recorded in this device are appropriately converted into data by a signal from an operation stop switch (not shown) of the absorption refrigerator (A) or an interrupt signal from the keyboard (KB). Printer (PR)
Printed out from. FIG. 8 is a chart showing an example of the printed data. In the data example shown in Fig. 8, the absorption refrigerator (A) was operated for 9 hours from 8:00 to 17:00 on September 20, 1985, during which the absorption liquid pump (P _A ) and the refrigerant liquid were used. Pump (P _R ), burner (B),
Each number operation of extraction pump (P _G) [start-stop times]
Driving time 15 times, 8 hours 21 minutes, 8 times, 7 hours 26 minutes, 10
It shows that it was 8 times 5 minutes, 1 time, 1 hour 12 minutes. In addition, in the control unit (D / O / C) of this device,
A calendar timer circuit is built-in [not shown], and the date and time are also recorded as data in the backup area of (RAM).

In broadcast operation of the oil replacement timing of the extraction pump (P _G) in the flow chart of FIG. 5, like the Furoyato shown in FIG. 4, the integrated operating time t of the keyboard (KB) extraction pump by (P _G) Is set to zero and stored in another backup area of (RAM).
First, as in the repeated operation of the steps <5> to <7> of the flow chart shown in FIG.
The accumulated operation time t of the extraction pump (P _G ) is incremented by 1 second while repeating the operation in five stages, and is sequentially stored in (RAM) as new information. Then, the total integrated operating time t is set to the set operating time (2
When it reaches 0 hour), the 5-step judgment operation becomes YES, and the operation moves to the 6-step operation. In the 6-step operation, the control unit (D / O / C) outputs the output interface (I / F _L.PR ).
Emits a signal to the alarm (LCD) via a Metsuseji the effect of oil replacement necessity of the bleed pump (P _G) is transmitted to the driver administrator by the annunciator. FIG. 6 is a chart showing a display example of this message. In this display example, a message is transmitted by using a red liquid crystal display, for example, as an annunciator (LCD) and blinking it. Alternatively, a blinking lamp may be used as the alarm, and the message may be printed out by the printer (PR) (see FIG. 7). Thus, after made the behavior of six stages convey Metsuseji, and stores again the keyboard to reset the integrated operating time t of the bleed pump (P _G) Examples by the operation of (KB) (RAM) 7 A two-step operation is performed and a two-step operation is returned. Incidentally, when the above Metsuseji is transmitted, it is of course the oil change extraction pump (P _G) is the continue to be operated administrator performed by a service engineer.

In addition, this device also informs the operation manager via the annunciator (LCD) when the refrigerant liquid pump (P _R ) and other pumps are disassembled and inspected, and the burner (B) is inspected and inspected. [For example, when notifying the timing of disassembling and inspecting the refrigerant liquid pump, the extraction pump in the flow chart of FIG. 5 may be replaced with the refrigerant liquid pump, and the oil exchange requirement may be replaced with the disassembly inspection requirement. ].

As described above, this device commands the start / stop of the extraction pump (P _G ) by the control unit (D / O / C) and sends this command information to (RAM) in the control unit (D / O / C). And confirm the memory by the control unit (D / O / C) [(RA
The memory of M) is called by the (CPU)] The start / stop of the extraction pump (P _G ) is recognized, and the number of times and the operation time of the extraction pump (P _G ) are controlled by the control unit (D. (O / C) (CPU) counts and integrates and accumulates it in the back-up area of (RAM) and also stores the preset operating time [the preset time for oil change] and the accumulated operating time. The control unit (D / O / C) compares the magnitudes of the above and the values with the control signal (D / O / C), and when the result of this comparison indicates that the integrated operating time has reached a value greater than or equal to the set operating time, control is performed Since it has a function to notify the operation manager of the message that the oil of the bleeding pump (P _G ) needs to be changed by the alarm (LCD) that receives the signal transmitted from the section (D ・ O ・ C). Inform the operation manager of the appropriate time to change the oil of the extraction pump It is convenient to obtain.

(G) Effect of the Invention As described above, the device of the present invention is convenient in that the number of times of operation and the operating time of the extraction refrigeration pump for an absorption refrigerating machine, which is often controlled to start and stop, are automatically integrated and recorded instead of being manually performed. And the convenience of notifying the operation manager of the appropriate time to change the oil of the extraction pump, and the good maintenance of the extraction pump and the prevention of failures, and the effect of being able to maintain the absorption chiller economically and easily over a long period of time. Exert.

[Brief description of drawings]

FIG. 1 is a schematic configuration explanatory view showing an embodiment of an oil replacement timing notification device for an absorption refrigeration air extraction pump according to the present invention,
FIG. 2 is a block diagram of the apparatus [invention apparatus] shown in FIG. 1, FIG. 3 is a flow chart showing an example of operation [start / stop] command operation by the apparatus of the present invention for the extraction pump, and FIG. A flow chart showing an example of an operation of integrating the number of times of pump operation (number of times of starting and stopping) and an operating time by the device of the present invention, and FIG. 5 shows an example of an operation of notifying the oil exchange time of the extraction pump by the device of the present invention. Flow chart, FIG. 6 is a table showing a display example of a message indicating that oil must be changed in the extraction pump sprayed by the device of the present invention, and FIG. 7 is a display example of a message printed out by the device of the present invention. FIG. 8 is a chart showing an example of data of the operating time and the number of times of driving of the absorption refrigerator driving device printed out by the device of the present invention. (A) ... Absorption refrigerator, (1) ... High temperature generator, (2)
...... Low temperature generator, (3) ...... Condenser, (4) …… Evaporator, (5) …… Absorber, (P _G ) …… Bleak pump,
(S _AP ) …… Sensor, (D ・ O ・ C) …… Control unit, (C
PU) ... Central processing unit, (ROM) ... Read
Only memory, (RAM) …… Random access memory, (CLOCK) …… Clock, (I / F _S ), (I / F _S )
F _KB ), (I / F _L.PR ), (I / F _OC ) ... interface, (KB) ...... keyboard, (LCD) …… alarm, (P
R) …… Printer.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisao Honda, 180 Sakata, Oizumi-cho, Gunma-gun Oizumi-cho, East Kyosanyo Electric Co., Ltd. (72) Inventor, Yasuo Sakata 180, Sakata, Oizumi-cho, Gunma-gun Sanyo Electric Co., Ltd. (72) Inventor Takaki Iwatani 180, Sakata, Oizumi-cho, Gunma Prefecture Tokyo Sanyo Electric Co., Ltd. (72) Inventor Kazuo Matsumoto 2-18, Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. In-house (72) Inventor Masayasu Ezaki 2-18 Keihan Hon-dori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (72) Inventor Masahiro Maekawa 2-18-18 Keihan Hon-dori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (56 ) References JP-A-62-106270 (JP, A)

Claims (1)

[Claims] 1. An operation command means for instructing start / stop of an extraction pump for an absorption refrigerating machine, and a signal from the operation command means for accumulating the operation time of the extraction pump and storing the integrated operation time in a storage element. At the same time, the comparison means having a built-in computer for comparing the magnitude of the set operating time and the integrated operating time stored in advance in the storage element, and the comparing means having determined that the integrated operating time becomes larger than the set operating time. The oil of the extraction pump for the absorption refrigerating machine, which is characterized in that it is connected through an interface with a notification means for receiving a signal from the comparison means at the time of judgment and notifying that the oil extraction pump needs to be changed. Replacement time notification device.