JP2002372348A - Absorption refrigerating unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorption refrigerating unit wherein corrosion or deterioration of airtightness can be detected in an early stage. SOLUTION: In the absorption refrigerating unit, a refrigerant gas evaporated in an evaporator is absorbed and dissolved in a solution in an absorber, a weak solution flowing out of the absorber is heated to turn into a strong solution for regeneration, and then the strong solution is returned to the absorber. The absorption refrigerating unit is provided with: a vacuum pump 71 for extracting a non-condensible gas in the absorber; an extracted gas quantity measuring device 73 for measuring the quantity of the non-condensible gas extracted by the vacuum pump 71; a gas composition measuring device 77 for measuring the composition of the non-condensible gas; and a data processor 80 for deriving change with time of absolute amounts of the composition of the non-condensible gas on the basis of the composition of the non-condensible gas measured by the gas composition measuring device 77 and the quantity of the on-condensible gas.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigerator, and more particularly to an abnormality detection system for the absorption refrigerator.

[0002]

2. Description of the Related Art An absorption refrigerator is a refrigerator using water as a refrigerant, a lithium bromide solution as an absorbent, and gas fuel or oil fuel as an energy source. This absorption refrigerator includes an evaporator, an absorber, a regenerator, and a condenser as main members, and a high vacuum (having an absolute pressure of 6
７7 mmHg).

In this evaporator, refrigerant (water) sent by a refrigerant pump is sprayed toward an evaporator tube through which cold water (for example, 12 ° C.) flows, so that the refrigerant is heated to become refrigerant vapor. . That is, since the evaporator is a high vacuum vessel, water (refrigerant) boils at about 4 to 6 ° C. and evaporates, so that cold water at 12 ° C. can be used as the heat source water.

[0004] Then, the temperature of the cold water is reduced (for example, to 7 ° C) by the amount of latent heat of evaporation given to the refrigerant (water), and then leaves the evaporator. Thus, the temperature decreases (for example, it becomes 7 ° C.)
The cooled water is sent to a cooling device or the like (cooling load) of the building and used for cooling. The cold water used for cooling rises in temperature (for example, to 12 ° C.) and flows into the evaporator tube of the evaporator again.

[0005] On the other hand, in the absorber, the refrigerant vapor generated in the evaporator is absorbed by the lithium bromide solution. The lithium bromide solution (hereinafter referred to as "dilute lithium bromide solution") having absorbed water and having a reduced concentration is collected at the bottom of the absorber. In this absorber, the latent heat of condensation when the refrigerant vapor is absorbed by the lithium bromide solution and changes from gas (water vapor) to liquid (water), and when the concentration of the lithium bromide solution becomes thin due to the absorption of moisture. Since heat of dilution is generated, these heats are removed by cooling water (circulated in a different system from the above “cold water”). Note that the lithium bromide solution is a substance that is rich in hygroscopicity and suitable for absorbing the refrigerant vapor, since the water vapor partial pressure is lower than the saturated vapor of water.

In the regenerator, the lithium bromide dilute solution sent from the absorber is heated. For this reason, the refrigerant in the lithium bromide dilute solution is partially vaporized and evaporated, and the solution is concentrated lithium bromide solution (hereinafter referred to as “lithium bromide concentrated solution”).
). The lithium bromide concentrated solution whose concentration has been raised to the original state is sent to the absorber and absorbs the refrigerant vapor again. On the other hand, the evaporated refrigerant vapor is sent to the condenser.

In the actual machine, a double-effect absorption refrigerator having a regenerator arranged in two stages is employed for the purpose of increasing heat efficiency and reducing heating energy. In this double-effect absorption refrigerator, as a regenerator, a high-pressure regenerator that heats a dilute solution of lithium bromide by burning supplied fuel and a high-temperature refrigerant vapor generated by the high-pressure regenerator are heated. A low-pressure regenerator for heating the dilute lithium bromide solution as a source.

[0008] In the condenser, the refrigerant vapor sent from the regenerator is cooled by cooling water and condensed and liquefied. This condensed water is supplied again to the evaporator as a refrigerant (water).

As described above, in the absorption refrigerator, the refrigerant (water)
Changes (phase change) with water-steam-water,
The lithium bromide solution changes (concentration solution-dilute solution-concentration solution) (change in concentration). In the process of the above-described phase change (refrigerant) and concentration change (lithium bromide solution), the absorption refrigerator produces cold water by the latent heat of evaporation of water, and absorbs water vapor by the absorption capacity of the lithium bromide solution. Is repeatedly performed in a high vacuum closed system.

In such an absorption refrigerator, the amount of fuel supplied to the high-pressure regenerator is increased to increase the amount of heating, and the concentration of the lithium bromide solution is increased, so that the temperature of the cold water flowing out of the evaporator is reduced. Can be lowered. Conversely, by decreasing the amount of fuel supplied to the high pressure regenerator to reduce the amount of heating and decreasing the concentration of the lithium bromide solution, the temperature of the cold water exiting the evaporator can be increased. Thus, by adjusting the concentration of the lithium bromide solution, the temperature of the cold water is controlled, and the temperature of the cold water flowing out of the evaporator is set to a set temperature (for example, 7 ° C.).

Here, the evaporator and the absorber in the absorption refrigerator will be described. FIG. 5 schematically shows the internal structure of the absorption refrigerator.

In a general absorption refrigerator, as shown in FIG. 5, an evaporator 101 and an absorber 102 are provided in the same shell, and a gas-liquid separator 103 is provided between the two. And a low-pressure regenerator 104 is provided above the absorber 102.
Condensers 105 are provided adjacent to the low-pressure regenerators 104, respectively. On one side of the box-shaped case body 107, a plurality of heat transfer tubes 112 are arranged in a grid pattern in the horizontal direction. On the other hand, a plurality of heat transfer tubes 114 are horizontally arranged on the other side of the box-shaped case main body 107.

Therefore, in the evaporator 101, the cold water used for cooling and whose temperature has risen flows to the plurality of heat transfer tubes 112 serving as the evaporator tubes, and when the refrigerant is sprayed toward the heat transfer tubes 112, This refrigerant is heated to become refrigerant vapor, and flows to the absorber 102 through the gas-liquid separator 103. In the absorber 102, the cooling water flows to a plurality of heat transfer tubes 114 serving as absorber tubes. The lithium bromide solution is sprayed toward the heat transfer tubes 114, and the refrigerant vapor generated in the evaporator 101. Is absorbed by the lithium bromide solution. Therefore, the lithium bromide solution that has absorbed the refrigerant vapor comes into contact with the heat transfer tube 114 to remove latent heat of condensation and heat of dilution by the cooling water flowing therein,
The low-concentration lithium bromide solution is collected at the bottom of the case body 107.

[0014]

In such an absorption refrigerator, measures for hermeticity and corrosion resistance are important for improving reliability. When the airtightness decreases, much air as non-condensable gas enters from the outside, and the heat transfer efficiency decreases. Also,
When corrosion occurs, the hydrogen gas is generated by the reaction of _{2Fe + 3H 2 O → Fe 2} O 3 + 3H 2, which also will lead to reduction of heat transfer efficiency. In general, even during normal operation, a small amount of non-condensable gas is generated. Therefore, when a certain amount of non-condensable gas accumulates, it is discharged to the outside using a bleed device.
However, in conventional absorption chillers, even when corrosion has progressed or airtightness has decreased and the amount of non-condensable gas has increased, only during regular (for example, twice a year) maintenance is performed. No corrosion or loss of tightness could be found. Therefore, since the operation is continued for a while after the corrosion or the decrease in the airtightness actually occurs, there is a problem that the corrosion or the decrease in the airtightness is further deteriorated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an absorption refrigerator capable of detecting corrosion or a decrease in airtightness at an early stage.

[0016]

According to a first aspect of the present invention, a refrigerant gas evaporated in an evaporator is absorbed and dissolved in a solution in an absorber, and a dilute solution exiting the absorber is heated to obtain a high temperature. In an absorption refrigerator that regenerates as a high-concentration solution and returns the high-concentration solution to the absorber, an extraction pump for extracting non-condensable gas in the absorber, and an amount of non-condensable gas extracted by the extraction pump Bleed gas amount measuring device to measure, gas composition measuring device to measure the composition of the non-condensable gas, non-condensable gas based on the non-condensable gas composition and the non-condensable gas amount measured by the gas composition measuring device And a data processing device for determining a change with time of the absolute amount of the composition component.

In the present invention, it is evaluated whether or not the data processing unit is in an abnormal state (reduced airtightness, progress of corrosion). At that time, the determination is made based on the composition and amount of the non-condensable gas. Then, the determination is made from the change over time of the absolute amount of the non-condensable gas composition. For example, when the absolute amount of hydrogen contained in the non-condensable gas increases, it is determined that corrosion has progressed, and when the absolute amount of nitrogen increases, it is determined that the hermeticity has decreased.

According to a second aspect of the present invention, in the absorption chiller according to the first aspect, the data processing device is arranged so that the increase amount of hydrogen or air component contained in the non-condensable gas exceeds a predetermined value. In addition, an alarm is issued.

According to the present invention, it is possible to promptly notify the user of the corrosion or the decrease in airtightness.

According to a third aspect of the present invention, in the absorption chiller according to the first or second aspect, the data processing device is provided when the amount of increase in hydrogen contained in the non-condensable gas exceeds a predetermined value. And controlling the injection of a corrosion inhibitor into the absorber.

In the present invention, when the increase amount of hydrogen exceeds a predetermined value, it is determined that the corrosion has progressed, and a corrosion inhibitor for preventing the corrosion is added. Thereby, the progress of corrosion is quickly prevented.

The invention according to claim 4 is the invention according to claims 1 to 3
In any one of the absorption refrigerators described above, a communication device is connected to the data processing device, and further, a monitoring device is provided at a location separated from the absorption refrigerator main body provided with the evaporator and the absorber. The absolute amount of the composition of the condensed gas is sent to the monitoring device via the communication device.

According to the present invention, a decrease in airtightness and corrosion can be monitored at a remote place away from the main body (evaporator and absorber) of the absorption refrigerator.

The invention according to claim 5 is the invention according to claims 1 to 4
In the absorption refrigerator according to any one of the above, the extraction pump, the extraction gas amount measurement device, the gas composition measurement device, and the data processing device are detachable from the absorption refrigerator main body provided with the evaporator and the absorber. It is characterized by the following.

In the present invention, since it is easy to apply to a conventional absorption refrigerator and only needs to connect a monitor device to the absorption refrigerator main body only when necessary, one absorption refrigerator can be used. One monitor device can be shared.

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a control block diagram of an absorption refrigerator according to a first embodiment of the present invention, FIG. 2 is a schematic configuration of the absorption refrigerator of the embodiment, and FIG. 3 is a partially enlarged view of the absorption refrigerator.

In the absorption refrigerator of the present embodiment, as shown in FIG. 2, the evaporator 10 and the absorber 20 are formed in the same shell (high vacuum vessel). An evaporator tube 11 is disposed in the evaporator 10. The evaporator tube 11 is supplied with cold water W through a cold water inlet line L1.
1 and the cold water W1 flowing through the evaporator tube 11
Is discharged outside through the cold water outlet line L2. The refrigerant (water) R pumped up by the refrigerant pump P1 via the refrigerant line L11 is sprayed toward the evaporator tube 11. The sprayed refrigerant R takes the latent heat of vaporization from the cold water W1 flowing in the evaporator tube 11, evaporates and vaporizes, and becomes refrigerant vapor r. This refrigerant vapor r is supplied to the absorber 2
It flows into the zero side.

The cold water W1 enters the evaporator 10 at a temperature of, for example, 12 ° C., is cooled by the evaporator tube 11, and
It is discharged from the evaporator 10 at a temperature of, for example, 7 ° C. The 7 ° C. cold water W1 coming out of the cold water outlet line L2 is used for cooling a building or for a process in a factory. The cooling water W1 used for cooling under a cooling load such as a building cooling condition rises in temperature, reaches a temperature of 12 ° C., and flows into the evaporator 10 again.

On the other hand, the absorber tube 2 is provided in the absorber 20.
1 is arranged. Cooling water W2 is supplied to the absorber tube 21 via a cooling water line L3. Then, the lithium bromide concentrated solution Y1 pumped by the solution pump P2 via the solution line L21 is sprayed toward the absorber tube 21. For this reason, the sprayed lithium bromide concentrated solution Y1 absorbs the refrigerant vapor r flowing into the absorber 20, and its concentration becomes thin. The diluted lithium bromide solution Y3 having a reduced concentration is collected at the bottom of the absorber 20. The heat generated in the absorber 20 is cooled by the cooling water W2 flowing in the absorber tube 21.

The lithium bromide dilute solution Y3 collected at the bottom of the absorber 20 is pumped by a solution pump P3.
It is supplied to the high-pressure regenerator 40 via the valve V5, the low-temperature heat exchanger 30, the solution line L22, the high-temperature heat exchanger 31, and the solution line L23.

The high-pressure regenerator 40 accommodates a furnace tube and a heat transfer tube in a body and is equipped with a burner. This high pressure regenerator 4
0 indicates that the fuel gas G is supplied via the gas line L31, the valve V21, and the fuel control valve V22,
The fuel gas G is burned to heat the lithium bromide dilute solution Y3. Dilute lithium bromide solution Y supplied to high-pressure regenerator 40
3 is heated and a part of the refrigerant is evaporated and vaporized to form a solution Y2 in lithium bromide having a medium concentration. The solution Y2 in lithium bromide is supplied to the low-pressure regenerator 50 through the solution line L24 and the high-temperature heat exchanger 31.

On the other hand, the refrigerant vapor r evaporated in the high-pressure regenerator 40 is supplied to the low-pressure regenerator tube 51 of the low-pressure regenerator 50 via the refrigerant line L12, and is further supplied to the condenser 60 via the refrigerant line L13. Supplied to Note that the low-pressure regenerator 50 and the condenser 60 are configured in the same shell.

In the low-pressure regenerator 50, the solution line L2
4, the solution Y2 in lithium bromide is supplied, and the dilute lithium bromide solution Y3 branched from the solution line L22 via the solution line L25 is sprayed toward the low-pressure regenerator tube 51. In this low-pressure regenerator 50,
The solutions Y2 and Y3 are heated by the low-pressure regenerator tube 51, a part of the refrigerant evaporates, and the concentration of the solution further increases,
A high concentration lithium bromide concentrated solution Y1 is collected at the bottom of the low pressure regenerator 50. The lithium bromide concentrated solution Y1 is supplied to the absorber 20 again by the solution pump P2.

The condenser 60 has a cooling water line L4
A condenser tube 61 to which the cooling water W2 is supplied is disposed. In the condenser 60, the refrigerant is evaporated in the high-pressure regenerator 40 and the refrigerant line L12 and the low-pressure regenerator tube 51
The refrigerant vapor r supplied through the refrigerant line L13 and the refrigerant vapor r evaporated by the low-pressure regenerator 50 and flowing into the condenser 60 are cooled and condensed in the condenser tube 61, (Water) becomes R. The refrigerant R is supplied to the evaporator 10 via the refrigerant line L14 by the gravity and the pressure difference.
Sent to The refrigerant R collected at the bottom of the evaporator 10 is
The refrigerant is again sprayed toward the evaporator tube 11 via the refrigerant line L11 by the refrigerant pump P1.

Reference numeral 70 denotes a corrosion inhibitor tank containing a Mo (molybdenum) inhibitor as a corrosion inhibitor charged into the absorber 20, and the corrosion inhibitor is supplied to the absorber 20 via a valve 70a. It is being supplied.

In the above-described absorption refrigerator, during the cooling operation, the valves V1, V2, V3, and V4 are closed (shown in black in the figure), and the valves V5 and V1 are closed.
1, V12, V13, and V14 are open (shown in white in the figure). Further, the absorption refrigerator can perform a heating operation, but is not related to the present invention, so that the description of the operation during the heating operation is omitted.

In the absorption refrigerator, hydrogen gas is generated during operation, or non-condensable gas flows from the outside. If such non-condensation accumulates inside, the heat transfer efficiency decreases. In order to prevent this, a bleed device 22 is provided. FIG. 3 shows the configuration around the bleeding device 22.
In FIG. 3, reference numeral 23 denotes an ejector mechanism, which comprises an upper ejector chamber 23a and a lower solution storage chamber 23b. Reference numeral 25 denotes a bleed tube, one end of which is open at a predetermined position in the absorber 20 and the other end of which is an ejector chamber 23.
a. Reference numeral 26 denotes a branch pipe that supplies a solution from the absorber 20 to the ejector chamber 23a, and reference numeral 27 denotes a communication pipe that connects the ejector chamber 23a and the solution storage chamber 23b. Reference numeral 28 denotes a return pipe for returning the solution from the solution storage chamber 23b to the absorber 20, one end of which is open to the bottom of the solution storage chamber 23b, and the other end of which is open to the absorber 20. Reference numeral 29 denotes an exhaust pipe for discharging non-condensable gas from the solution storage chamber 23b to the outside.

Reference numeral 71 denotes a vacuum pump (bleeding pump), and reference numeral 72 denotes a pressure sensor. When the pressure of the non-condensable gas exceeds a certain value, the vacuum pump 71 is started and the solenoid valve 78 is opened. Has become. In this extraction device 22, the solution in the absorber 20 is introduced into the ejector chamber 23a through the branch pipe 26. Due to the negative pressure generated based on the flow at this time, the non-condensable gas is sucked from the absorber 20 into the ejector chamber 23a through the bleed pipe 25. The solution and the non-condensable gas introduced into the ejector chamber 23a are
The solution enters the solution storage chamber 23b through the communication pipe 27. When the pressure of the non-condensable gas exceeds a certain level, the vacuum pump 71 is automatically started, and about 1500 ml (at atmospheric pressure) of the non-condensable gas is sucked through the exhaust pipe 29.

FIG. 1 is a control block diagram showing an abnormality detecting section of the absorption refrigerator according to the present embodiment. In the drawing, reference numeral 73 denotes a bleed gas amount measuring device for counting the number of times of operation of the vacuum pump 71 by the pressure sensor 72 described above. 74 is a data evaluation device. The data evaluation device 74 evaluates the number of times of bleeding counted by the bleed gas amount measuring device 73, and detects an abnormal state (when the number of times of bleeding increases compared to the normal state, for example, when it exceeds once per hour). In this case, the gas sampling / introducing device 75 is started. The gas sampling / introducing device 75 is a device that takes in a part of the non-condensable gas sucked by the vacuum pump 71 after passing through an oil mist removal filter 76. The non-condensable gas taken in the gas sampling / introducing device 75 is taken in the gas composition measuring device 77. The gas composition measuring device 77 is a device for measuring the composition of hydrogen, and includes a gas chromatograph method, a catalytic combustion method,
It is possible to use a hydrogen concentration meter such as a gas heat conduction type or a hot wire type semiconductor type. Reference numeral 80 denotes a data processing device, which performs the following control based on the composition of the non-condensable gas measured by the gas composition measuring device 77 and the amount of non-condensable gas based on the number of times of bleeding evaluated by the data evaluating device 74. It is a device that performs. That is, when the increase of hydrogen contained in the non-condensable gas is remarkable, a corrosion inhibitor (Mo inhibitor) described later is used.
When the increase of the air component is remarkable, a leak countermeasure control described later is performed. The composition ratio of the air component is derived by subtracting the composition ratio of hydrogen from the total amount.

Next, a description will be given of the abnormality detecting section of the absorption refrigerator configured as described above. By driving the absorption refrigerator, non-condensable gas accumulates in the absorber 20. This non-condensable gas is extracted by the extraction device 22. When the non-condensable gas in the bleed device 22 exceeds a certain pressure, the vacuum pump 71 is activated by the pressure sensor 72 and the non-condensable gas is sucked. The number of activations of the vacuum pump 71 is counted by the bleed gas amount measuring device 73 and sent to the data evaluation device 80. In the data evaluation device 80, the vacuum pump 7
The number of times of start-up is evaluated, and when an abnormal state occurs, the gas sampling / introducing device 75 is started. Gas sampling and introduction device 7
A part of the non-condensable gas extracted by the vacuum pump 71 is taken into 5 and sent to the gas composition measuring device 77.
The gas composition measuring device 77 measures the composition of the non-condensable gas, and sends the measurement result to the data processing device 80.

The data processor 80 calculates the absolute amounts of hydrogen and air components from the composition of the non-condensable gas and the amount of non-condensable gas based on the number of times the vacuum pump 71 has been started. Then, the change with time of the absolute amount is evaluated, and the following control is performed. When the amount of increase in hydrogen exceeds a predetermined value, Mo inhibitor is injected.
Specifically, the valve V3 in FIG. 2 is opened, and the valve 70a of the corrosion inhibitor tank 70 is opened. Thereby, the Mo inhibitor contained in the corrosion inhibitor tank flows into the absorber 20 and spreads throughout the system, thereby preventing corrosion. If the increase in the air component is remarkable, it is considered that the airtightness has decreased, so that the operation of the absorption refrigerator is stopped and an alarm is issued to notify the user. As the alarm, other than the presence / absence of an abnormality, means for displaying, on a monitor screen, information such as the amount of extracted gas, hydrogen, and the absolute change of the air component over time can be used. As described above, according to the absorption refrigerator of the present example, corrosion or a decrease in airtightness can be found at an early stage.

In the above example, the data processing device 8
A value of 0 does not stop the operation of the absorption refrigerator, and may simply issue an alarm.

Next, an example of a remote monitoring system for monitoring the absorption refrigerator from a remote place will be described with reference to FIG. In the figure, reference numeral 90 denotes an absorption chiller installation facility in which the above absorption chiller is installed, and 91 denotes an absorption chiller management facility (manufacturer's service facility) located at a remote location with respect to the absorption chiller installation facility 90. ). The absorption refrigerator has a microcomputer board 92 on which a data processing device 80 is mounted. The microcomputer board 92 is provided with a communication device 93. The absorption chiller management facility 91 is provided with a communication device 94 for communicating with the communication device 93 and a computer (monitoring device) 95 connected to the communication device 94. The communication devices 93 and 94 are configured to be able to transmit and receive data by communication means such as the Internet, a general telephone line, and a communication satellite even if they are separated from each other.

In this remote monitoring system, the measurement result of the extracted gas by the gas composition measuring device 77 is transmitted to the computer 95 of the absorption chiller management facility 91 via the communication device 93. The computer 95 stores the measurement results and monitors the data. Then, in the same manner as described above, if an abnormality is found in the change over time in the absolute composition of the non-condensable gas, the operator sets the absorption chiller installation facility 9
Go to 0 to repair the absorption chiller or contact the operator of the absorption chiller installation facility 90 to perform the necessary work such as the injection of the Mo inhibitor and the stop of the device. When the worker performs repair, the data processing device 80 itself does not need to directly stop the device, generate an alarm, or inject the Mo inhibitor. However, these may be combined, an alarm may be issued, the operation may be stopped, and then the operator may perform the repair. As described above, in the present remote monitoring system, corrosion or a decrease in airtightness of the absorption refrigerator can be detected at an early stage, and maintenance can be performed quickly. In addition, since a plurality of absorption chillers located at remote locations can be centrally managed by the refrigeration absorber management facility 91, efficiency is improved.

Each of the above absorption refrigerators may be configured as follows. The extracted gas amount measuring device 73, the data evaluation device 74, the gas sampling / introducing device 75, the oil mist removal filter 76, the gas composition measuring device 77, and the data processing device 80 are connected to the absorption refrigerator main body (evaporator 10, absorber 20, etc.). ), A portable monitoring device that is detachable from the main body may be connected to the absorption refrigerator main body for a certain period of time to monitor the soundness of the absorption refrigerator. In such a configuration, a monitor device can be easily applied to a conventional absorption refrigerator, and a monitor device can be connected to the absorption refrigerator only when necessary. Can be shared.

[0046]

As described above, the following effects can be obtained in the absorption refrigerator of the present invention. According to the first aspect of the present invention, the data processing device obtains a change with time of the absolute amount of the non-condensable gas composition based on the non-condensable gas composition and the non-condensable gas amount measured by the gas composition measuring device. By judging an abnormal state based on the above, it is possible to detect corrosion or a decrease in airtightness at an early stage without waiting for regular maintenance.

According to the second aspect of the present invention, when the amount of increase in the amount of hydrogen or air contained in the non-condensable gas exceeds a predetermined value, the data processing device issues an alarm, thereby providing the user with a warning. Corrosion or loss of tightness can be signaled quickly.

According to the third aspect of the present invention, the corrosion inhibitor is dropped when the increase amount of hydrogen exceeds a predetermined value, so that the progress of corrosion is quickly prevented.

According to the fourth aspect of the present invention, a decrease in airtightness and corrosion can be monitored at a location away from the main body of the absorption refrigerator. In addition, since a plurality of absorption chillers located at remote locations can be centrally managed, efficiency is improved.

According to the fifth aspect of the present invention, the bleeding pump, the bleeding gas amount measuring device, the gas composition measuring device and the data processing device are detachable from the main body of the absorption refrigerator provided with the evaporator and the absorber. Therefore, it can be easily applied to a conventional absorption refrigerator. In addition, since the monitor device may be connected to the absorption refrigerator main body only when necessary, one monitor device can be shared by a plurality of absorption refrigerators, and the efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a control block diagram of an absorption refrigerator shown as one embodiment of the present invention.

FIG. 2 is a diagram showing a schematic configuration of the absorption refrigerator.

FIG. 3 is a partially enlarged view of the absorption refrigerator.

FIG. 4 is a schematic diagram showing a remote monitoring system of the absorption refrigerator.

FIG. 5 is a cross-sectional view showing a schematic configuration of an evaporator and an absorber of a conventional absorption refrigerator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Evaporator 20 Absorber 71 Vacuum pump (bleeding pump) 73 Bleed gas amount measuring device 77 Gas composition measuring device 80 Data processing device 93 Communication device 95 Computer (monitoring device)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiro Kawada 2-1-1 Shinhama, Arai-machi, Takasago-shi, Hyogo Prefecture Inside the Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. 3-1-1, Machi F-term in Mitsubishi Heavy Industries, Ltd. Cooling Business Division (Reference) 3L093 CC00 DD00 EE00 GG00 HH00 JJ00 KK05 KK07 LL03 LL11 MM08 5K048 CA08 DC03 EA11 EB02 EB10 FC01 HA01 HA02

Claims (5)

[Claims] 1. A refrigerant gas evaporated in an evaporator is absorbed and dissolved in a solution in an absorber, and a dilute solution exiting the absorber is heated to be regenerated as a high-temperature high-concentration solution. In the absorption refrigerator returning to the absorber, an extraction pump for extracting non-condensable gas in the absorber, an extraction gas amount measuring device for measuring an amount of non-condensable gas extracted by the extraction pump, and the non-condensable gas A gas composition measuring device for measuring the composition of the non-condensable gas measured by the gas composition measuring device and the amount of the non-condensable gas and a data processing for obtaining a change with time of the absolute amount of the composition component of the non-condensable gas An absorption refrigerator comprising: an apparatus; 2. The absorption refrigerator according to claim 1, wherein the data processing device issues an alarm when an increase amount of hydrogen or air component contained in the non-condensable gas exceeds a predetermined value. Characteristic absorption refrigerator. 3. The absorption refrigerator according to claim 1, wherein the data processing device prevents the absorber from corroding when the amount of hydrogen contained in the non-condensable gas exceeds a predetermined value. An absorption chiller characterized by performing control for adding an agent. 4. The absorption refrigerator according to claim 1, wherein a communication device is connected to the data processing device.
A monitoring device is provided at a location separated from the absorption refrigerator body provided with the evaporator and the absorber, and the absolute amount of the composition of the non-condensable gas is sent to the monitoring device via the communication device. Absorption refrigerator. 5. The absorption refrigerator according to claim 1, wherein the bleeding pump, the bleeding gas amount measuring device, the gas composition measuring device and the data processing device are provided with the evaporator and the absorber. An absorption refrigerator which is detachable from a refrigerator body.