JP3048817B2 - Non-condensable gas discharge device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-condensable gas discharge device provided in an absorption refrigerator.

[0002]

2. Description of the Related Art For example, Japanese Unexamined Utility Model Publication No. 60-111854 discloses a gas bleeding device for bleeding non-condensable gas in an evaporator or an absorber using an absorbing liquid in an absorption refrigerator, and a gas bleeding device. Absorption refrigeration equipped with a gas storage chamber for storing the extracted non-condensable gas, and a hydrogen discharge tube made of palladium metal or palladium alloy connected to the gas storage chamber and transmitting hydrogen in the non-condensable gas to the outside. Machine is disclosed.

[0003]

In the prior art as described above, during operation of an absorption refrigerator, refrigerant vapor of an evaporator or an absorber is extracted together with non-condensable gas such as hydrogen into a gas extraction device, and the refrigerant vapor is removed. When the gas flows into the gas storage chamber, the refrigerant vapor adheres to the surface of the hydrogen discharge tube, which causes a problem that the hydrogen permeation amount of the hydrogen discharge tube is reduced and the hydrogen discharge capability is reduced. If the state in which the hydrogen discharge capacity has been reduced continues for a long time, the pressure in the gas storage chamber increases, the bleeding capacity of the gas bleeding apparatus also decreases, the concentration of non-condensable gas in the equipment increases, and the There is also a problem that a high temperature or a high pressure is generated, and an abnormal stop device of the absorption refrigerator operates to abnormally stop.

The present invention secures the ability to release hydrogen from a gas storage chamber and stabilizes the operation of an absorption refrigerator.

[0005]

According to the first aspect of the present invention, an absorber 2, a high-temperature generator 4, a condenser 7, and an evaporator 1 are connected by piping. Gas extraction device 3 for extracting non-condensable gas inside the absorption chiller using the absorption liquid inside the absorption chiller in which a circulation path for the absorption liquid and the refrigerant is formed.
7, an uncondensable gas tank 50 that communicates with the gas extraction device 37 to store the extracted non-condensable gas, and a palladium cell 51 that communicates with the non-condensable gas tank 50 to extract and permeate and release the hydrogen gas in the non-condensable gas. A refrigerant pipe 52 from the condenser 7 to the evaporator 1 and into which the refrigerant liquid of the condenser 7 flows. The non-condensable gas tank 50 is cooled in the middle of the refrigerant pipe 52. The palladium cell 51 is provided with a heat exchanger 54 for preventing water vapor from adhering thereto, and an orifice 53 is provided upstream of the heat exchanger.
Is provided, and a non-condensable gas discharge device is provided.

According to the second aspect of the present invention, a refrigerant having a refrigerant liquid circulation pump 21 in the middle of a pipe connecting a refrigerant liquid reservoir at a lower part of the evaporator 1 and a refrigerant liquid spraying device at an upper part of the evaporator. A liquid circulation pipe 20 and a refrigerant pipe 61 provided with a heat exchanger 62 for branching from the refrigerant liquid circulation pipe on the outlet side of the refrigerant liquid circulation pump to the condenser 7 and cooling the non-condensable gas tank 50 on the way. And a non-condensable gas discharging device.

Further, according to the third aspect of the present invention, the refrigerant liquid in the lower part of the evaporator and the refrigerant liquid dispersing device in the upper part of the evaporator are connected by piping, and the refrigerant liquid has a refrigerant liquid circulation pump 21 in the middle. A circulation pipe 20 is provided, and a refrigerant liquid circulation pump outlet side pipe of the refrigerant liquid circulation pipe provides an uncondensable gas discharge device penetrating the noncondensable gas tank 50. Also,
According to the invention described in claim 4, the heat exchanger 54 cools the non-condensable gas tank 50 after the refrigerant liquid flowing out of the condenser 7 evaporates or the refrigerant liquid flowing out of the evaporator flows.
A gas supply pipe 56 connected to the non-condensable gas tank 50 by piping and having an on-off valve 58 on the way, and a condensed water discharge pipe 55 connected to the bottom of the non-condensable gas tank by piping and having an on-off valve 57 on the way. A non-condensable gas discharge device is provided.

According to the fifth aspect of the invention, the heat exchanger cools the non-condensable gas tank 50 after the refrigerant liquid flowing out of the condenser 7 evaporates or the refrigerant liquid flowing out of the evaporator 1 flows. And a condensed water discharge pipe 55 having an on-off valve 57 on the way from the bottom of the non-condensable gas tank 50 to the gas extraction device 37.

[0009]

According to the first aspect of the present invention, the steam that has flowed in with the non-condensable gas is cooled and condensed by the heat exchanger 54 provided in the non-condensable gas tank 50 and through which the low-temperature refrigerant vapor flows. Adhesion of water vapor to the hydrogen permeable surface can be suppressed, and the hydrogen discharge capability of the palladium cell 51 can be maintained. As a result, the operation of the absorption refrigerator can be prevented by avoiding an increase in the concentration of non-condensable gas, particularly hydrogen gas, in the equipment. It becomes possible to be stable.

According to the second aspect of the present invention, the steam which has flowed in with the non-condensable gas is cooled and condensed by the heat exchanger 62 provided in the non-condensable gas tank 50 and through which the low-temperature refrigerant liquid flows. That is, it becomes possible to suppress the adhesion of water vapor to the hydrogen permeable surface and maintain the hydrogen discharge capability of the palladium cell 51, and the refrigerant liquid whose temperature has risen in the heat exchanger 62 is returned to the condenser 7, and the refrigerant liquid pool 7
7 flows to the evaporator 1 together with the refrigerant liquid stored in
The refrigerant liquid discharged from the refrigerant pump 21 does not mix with the refrigerant liquid whose temperature has increased through the heat exchanger 62, and the refrigerant liquid discharged from the refrigerant pump 21 has almost no temperature increase in the evaporator 1 as it is. It is sprayed and the cooling efficiency can be maintained in the evaporator 1.

According to the third aspect of the present invention, the water vapor that has flowed in along with the non-condensable gas is cooled and condensed by the heat exchanger 63 through which the low-temperature refrigerant flows through the non-condensable gas tank 50, and the surface of the palladium cell 51 is condensed. That is, the adhesion of water vapor to the hydrogen permeable surface can be suppressed, and the hydrogen discharge capability of the palladium cell 51 can be maintained. As a result, the operation of the absorption chiller / heater can be performed while avoiding an increase in the concentration of non-condensable gas, particularly hydrogen gas, in the equipment. And the entire amount of the refrigerant liquid flowing through the refrigerant circulation pipe 20 flows through the heat exchanger 63, so that the amount of steam condensed in the heat exchanger 63 increases and the non-condensable gas tank 5
The amount of water vapor in 0 can be suppressed very slightly, and as a result, the hydrogen discharge capacity of the palladium cell 51 can be further improved.

According to the fourth aspect of the present invention, the condensed water accumulated in the non-condensable gas tank 50 can be discharged from the bottom of the non-condensable gas tank to the outside by switching the open / close valves 58 and 59. A large amount of condensed water can be prevented from accumulating in the gas tank 50 and reaching the heat exchanger 54, and the condensation of water vapor by the heat exchanger 54 can be continued,
It becomes possible to slightly suppress the amount of water vapor in the non-condensable gas tank for a long time.

Further, according to the fifth aspect of the present invention, there is no need to provide the gas supply pipe 56 and the on-off valve 58, so that the structure can be simplified, and there is no need to provide a pipe or the like that communicates with the outside. The confidentiality of the chiller / heater can be more reliably maintained, and invasion of non-condensable gas from the outside can be avoided.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram of an absorption chiller / heater which is an absorption refrigerator using, for example, water as a refrigerant and a lithium bromide (LiBr) solution as an absorption liquid (solution), wherein 1 is an evaporator, and 2 is an absorber. Reference numeral 3 denotes an evaporator absorber body (hereinafter, referred to as a lower body) containing the evaporator 1 and the absorber 2, 4 denotes a high-temperature regenerator equipped with, for example, a gas burner 5 and is heated by a high-temperature heat source, 6 denotes a low-temperature regenerator, 7 Is a condenser,
Reference numeral 8 denotes a low-temperature regenerator condenser body (hereinafter, referred to as an upper body) housing the low-temperature regenerator 6 and the condenser 7, 9 denotes a low-temperature heat exchanger, 10
Is a high-temperature heat exchanger; 11 to 15 are absorbent pipes; 16 is an absorbent pump provided in the middle of the absorbent pipe 11;
19 to 19 are refrigerant pipes, 20 is a refrigerant circulation pipe, 21 is a refrigerant pump, 22 is a gas pipe connected to the gas burner 5,
23 is a heating amount control valve, and 24 is an evaporator heat exchanger 25 on the way.
Are provided, and are connected to each other as shown in FIG.

Reference numeral 26 denotes a cooling water pipe, and an absorber heat exchanger 27 and a condenser heat exchanger 28 are provided in the cooling water pipe 26. 29 is a refrigerant bypass pipe connecting the refrigerant reservoir 30 of the evaporator 1 to the absorbent reservoir 31 of the absorber 2, 32 is an on-off valve, and 33 is an absorbent bypass pipe connecting the absorbent pipe 12 and the absorber 2. , 34 is an on-off valve,
35 is a refrigerant vapor bypass pipe connecting the refrigerant pipe 17 and the absorber 2, and 36 is an on-off valve.
36 is closed when cold water is supplied and opened when hot water is supplied.

Reference numeral 37 denotes a conventionally known non-condensable gas extraction device for separating and storing the non-condensable gas extracted from the absorption chiller / heater. Reference numeral 38 denotes a container of the non-condensable gas extraction device 37. The container 38 has an extraction chamber 39 in the upper part and a storage chamber 40 in the middle part.
Is provided with a separation chamber 41 at the bottom. And bleed chamber 3
An ejector 42 is provided at 9, and a down pipe 39 </ b> A for the non-condensable gas and the absorbing liquid extends downward from the bleed chamber 39. The discharge end of an absorption liquid supply pipe 42 branched from the discharge side pipe of the absorption liquid pump 16 in the absorption liquid pipe 11 is open to the bleed chamber 39. 43 is provided in the middle of the absorbent supply pipe 42,
An absorber cooler in which part of the cooling water sent to the absorber heat exchanger 27 flows to cool the absorber.

Reference numeral 44 denotes a first bleed pipe having one end open to the gas phase of the absorber 2 and the other end open to the bleed chamber 39, and 45 denotes one end open to the gas phase of the condenser 7 and the other end to bleed. This is a second bleed tube opened to the chamber 39. 46 is a non-condensable gas discharge pipe,
This non-condensable gas discharge pipe 46 has an on-off valve 47 in the middle,
It is connected to a vacuum pump (not shown). Reference numeral 48 denotes a communication pipe. An on-off valve 49 is provided in the middle of the communication pipe 48, one end of which is connected to the bleed chamber 39, and the other end of which is connected to the non-condensable gas tank 50. A plurality of palladium cells 51 made of, for example, palladium are connected to the non-condensing gas tank 50. 52 is a refrigerant pool 77 of the condenser 7
A refrigerant pipe extending from the refrigerant evaporator 30 to the evaporator 30. A refrigerant evaporator 53, for example, an orifice is provided in the middle of the refrigerant pipe 52, and a refrigerant pipe 52 downstream of the refrigerant evaporator 53 is provided.
Is passed through the non-condensable gas tank 50 and the heat exchanger 54
Act as

Further, a condensed water discharge pipe 55 and a gas supply pipe 56 are connected to the non-condensable gas tank 50 as shown in FIG. 57 and 58 are provided. And, during normal operation of the absorption chiller / heater, the on-off valve 49 is open,
The on-off valves 47, 57 and 58 are closed. Reference numeral 60 denotes an absorption liquid return pipe extending from the separation chamber 41 to the gas phase of the absorber 2.

During the operation of supplying cold water of the absorption refrigerator, the refrigerant evaporated in the high-temperature regenerator 4 flows to the condenser 7 through the low-temperature regenerator 6 as in the case of the conventional absorption refrigerator, and the heat exchanger is connected to the condenser. After being condensed and liquefied by exchanging heat with the cooling water flowing through 28, it flows to the evaporator 1 via the refrigerant pipe 19. Then, the refrigerant exchanges heat with the water flowing through the evaporator heat exchanger 24 to evaporate, and the water flowing through the evaporator heat exchanger 25 is cooled by the heat of vaporization.
Then, cold water circulates through the load. Further, the refrigerant evaporated in the evaporator 1 is absorbed by the absorbing liquid in the absorber 2. The absorption liquid whose concentration has been reduced by absorbing the refrigerant is sent to the high-temperature regenerator 4 via the low-temperature heat exchanger 9 and the high-temperature heat exchanger 10 by the operation of the absorption liquid pump 16. The absorbing liquid sent to the high-temperature regenerator 4 is heated by the burner 5 to evaporate the refrigerant, and the medium-density absorbing liquid flows through the high-temperature heat exchanger 10 to the low-temperature regenerator 6. In the low-temperature regenerator 6, the absorbing liquid is heated by the refrigerant vapor flowing from the high-temperature regenerator 10 through the refrigerant pipe 17, and the refrigerant vapor is further separated to increase the concentration. The high-concentration absorbent is cooled down through the low-temperature heat exchanger 9 and sent to the absorber 2 where it is dispersed.

The operation of discharging the non-condensable gas when the absorption refrigerator is operated as described above will be described. A part of the absorbing liquid discharged from the absorbing liquid pump 16 flows into the absorbing liquid pipe 42, and the temperature thereof is lowered in the absorbing liquid cooler 43, sent to the bleed chamber 39, and discharged to the ejector 42. In the bleeding chamber 39, the ejected absorbent causes an ejector action to pass through the first bleeding pipe 44 and the second bleeding pipe 45, thereby causing the non-condensable gas such as hydrogen gas and other oxygen in the absorber 2 and the condenser 7 or water vapor. Is bled. The extracted non-condensable gas and the like flow down the downflow pipe 39A together with the absorbing liquid, and the non-condensing gas separated from the absorbing liquid in the separation chamber 41 accumulates in the storage chamber 40.

The non-condensable gas or water vapor stored in the storage chamber 40 flows to the non-condensable gas tank 50 through the connecting pipe 48,
Among the non-condensable gas, hydrogen gas is released from the palladium cell 51 to the outside. The liquid refrigerant flowing from the condenser 7 into the refrigerant pipe 52 evaporates in the refrigerant evaporating mechanism 53 and is cooled by the heat exchanger 54.
Flows to Therefore, the steam flowing into the non-condensing gas tank 50 is cooled by the heat exchanger 54 and condensed.

As described above, the water vapor flowing into the non-condensable gas tank 50 is condensed, and the amount of condensed water in the non-condensable gas tank 50 gradually increases with the operation of the absorption chiller / heater and the operation of the non-condensable gas extraction device 37. I do. For this reason, the operator of the absorption chiller / heater closes the opening / closing valve 49, opens the opening / closing valve 58, and supplies nitrogen gas, for example, from the gas supply pipe 56 to the non-condensable gas tank 50 after a lapse of a predetermined period or during periodic inspection of the absorption chiller / heater. send. Thereafter, the on-off valve 58 is closed and the on-off valve 57 is opened, so that the condensed water stored in the non-condensable gas tank 50 is discharged to the outside through the condensed water discharge pipe 55.

After discharging the condensed water, the downstream vacuum pump is operated for a predetermined time while the on-off valve 57 is closed and the on-off valve 47 is closed. Thereafter, by opening the on-off valve 47 and the on-off valve 49, the nitrogen gas and other gases in the non-condensable gas tank 50 and the communication pipe 48 are discharged through the communication pipe 48, the storage chamber 40, and the non-condensable gas discharge pipe 46. Then, by closing the on-off valve 47, the non-condensable gas flows into the non-condensable gas tank 50 again from the storage chamber 40, the hydrogen gas is discharged in the same manner as described above, and the steam is condensed and accumulated in the non-condensable gas tank 50. The operation of the vacuum pump is continued for a predetermined time after the on-off valve 47 is closed.

According to the above-described embodiment, the water vapor flowing in with the non-condensable gas is cooled and condensed by the heat exchanger 54 provided in the non-condensable gas tank 50, and the palladium cell 5
1 can suppress the adhesion of water vapor to the surface, that is, the hydrogen permeable surface, and can maintain the hydrogen discharge capability of the palladium cell 51. As a result, it is possible to avoid an increase in the concentration of non-condensable gas, particularly hydrogen gas, in the equipment and absorb the cold and hot water. The operation of the machine can be stabilized.

In the above embodiment, the condensed water accumulated in the non-condensable gas tank 50 can be discharged from the bottom of the non-condensable gas tank to the outside by switching the open / close valves 49, 58 and 59. A large amount of condensed water can be prevented from accumulating in the heat exchanger 50 and reaching the heat exchanger 54. As a result, the steam condensing action of the heat exchanger 54 can be continued, and the amount of water vapor in the non-condensable gas tank can be slightly suppressed for a long time. Can be.

For example, the condensed water discharge pipe 55 is connected to the storage chamber 40 of the non-condensable gas bleeding device 37 as shown by a dashed line. Then, the on-off valve 57 may be opened at predetermined intervals or at the time of periodic inspection, and the accumulated condensed water may be returned to the non-condensable gas extraction device 37. In this case,
There is no need to provide the open / close valve 49, the gas supply pipe 56, and the open / close valve 58, so that the configuration can be simplified, and there is no need to provide a pipe or the like that communicates with the outside, and the confidentiality of the absorption chiller / heater is more reliably secured. Can also keep the heat exchanger 54
May be piped along the outer wall of the non-condensable gas tank 50 to cool the wall surface of the non-condensable gas tank 50 by heat conduction from the heat exchanger 54 and condense water vapor on the inner wall.

Hereinafter, a second embodiment of the present invention will be described with reference to FIG. It should be noted that a configuration that is not particularly described is the same as that of the first embodiment, and a detailed description is omitted. Reference numeral 61 denotes a refrigerant pipe that branches from the middle of the discharge-side pipe of the refrigerant pump 21 of the refrigerant circulation pipe 20 and reaches the gas phase portion of the condenser 7. The refrigerant pipe 61 is disposed in the non-condensable gas tank 50 halfway. A heat exchanger 62 is provided.

During operation of the absorption chiller / heater, non-condensable gas flows into the non-condensable gas tank 50 as in the first embodiment, and hydrogen gas is discharged to the outside through the palladium cell 51. In addition, a part of the refrigerant liquid discharged from the refrigerant pump 21 flows into the refrigerant pipe 61, and a refrigerant liquid of, for example, 7 to 8 ° C. flows into the heat exchanger 62. The water vapor flowing into the non-condensable gas tank 50 together with the non-condensable gas is cooled by exchanging heat in the heat exchanger 62 through which the refrigerant liquid flows, condensed, and gradually accumulates at the bottom of the non-condensable gas tank 50. The refrigerant liquid that has passed through the heat exchanger 62 flows into the condenser 7 and flows to the evaporator 1 together with the refrigerant liquid in the refrigerant pool 77.

As described above, the steam flowing into the non-condensable gas tank 50 is condensed, and the amount of condensed water in the non-condensable gas tank 50 gradually increases with the operation of the absorption chiller / heater and the operation of the non-condensable gas bleeder 37. I do. For this reason, the operator of the absorption chiller / heater opens the opening / closing valve 57 when the predetermined period elapses or during the periodic inspection of the absorption chiller / heater, and the non-condensable gas tank 5 is opened.
The condensed water accumulated at 0 flows through the condensed water discharge pipe 55 to the storage chamber 40 of the non-condensable gas extraction device 37. After discharging the condensed water, the on-off valve 57 is closed so that the non-condensable gas flows again from the storage chamber 40 through the connecting pipe 48 to the non-condensable gas tank 5.
0, the hydrogen gas is discharged in the same manner as described above, and the water vapor condenses and accumulates in the non-condensable gas tank 50. Here, a gas supply pipe 56 having an on-off valve 58 is connected to the non-condensable gas tank 50, an on-off valve 49 is provided on the connecting pipe 48, and a condensed water discharge pipe 55 is provided in the same manner as in the first embodiment.
May be opened to the outside to discharge the condensed water to the outside.

The heat exchanger 62 is connected to the non-condensable gas tank 5.
0 may be provided along the outer wall to cool the wall surface of the non-condensable gas tank 50 by heat conduction from the heat exchanger 62 and condense water vapor on the inner wall. According to the above-described embodiment, the water vapor flowing in with the non-condensable gas is cooled and condensed by the heat exchanger 62 provided in the non-condensable gas tank 50 through which the low-temperature refrigerant liquid flows, and the water vapor flows to the surface of the palladium cell 51, that is, the hydrogen permeable surface. Palladium cell 51
As a result, it is possible to avoid an increase in the concentration of non-condensable gas, particularly hydrogen gas, in the equipment and to stabilize the operation of the absorption chiller / heater.

The refrigerant liquid whose temperature has risen in the heat exchanger 62 is returned to the condenser 7 and flows to the evaporator 1 together with the refrigerant liquid stored in the refrigerant liquid reservoir 77. Does not mix with the refrigerant liquid whose temperature has increased after passing through the heat exchanger 62. As a result, the refrigerant liquid discharged from the refrigerant pump 21 is sprayed by the evaporator 1 as it is with almost no temperature rise, and the cooling efficiency can be maintained in the evaporator 1.

Hereinafter, a third embodiment of the present invention will be described with reference to FIG. It is to be noted that a configuration that is not particularly described is the same as that of the first and second embodiments, and a detailed description is omitted. As shown by the broken line in FIG.
A heat exchanger 63 is formed so as to penetrate substantially the center of 0 in the vertical direction.

At the time of operation of the absorption chiller / heater, as in the first and second embodiments, the non-condensable gas flows into the non-condensable gas tank 50, and the hydrogen gas is discharged to the outside through the palladium cell 51. . Further, the refrigerant liquid of, for example, 7 to 8 ° C. discharged from the refrigerant pump 21 flows to the heat exchanger 63. Then, the water vapor flowing into the non-condensable gas tank 50 together with the non-condensable gas is cooled by exchanging heat in the heat exchanger 63 in which the refrigerant liquid flows, condensed on the outer wall of the heat exchanger 63 and flows downward to be condensed. Gradually accumulates at the bottom of The refrigerant liquid that has passed through the heat exchanger 63 is sprayed by the evaporator 1.

As described above, the water vapor flowing into the non-condensable gas tank 50 is condensed in the heat exchanger 63, and gradually condenses in the non-condensable gas tank 50 with the operation of the absorption type chiller / heater and the operation of the non-condensable gas extraction device 37. The amount of water increases. For this reason, the condensed water accumulated in the non-condensable gas tank 50 is opened via the condensed water discharge pipe 55 when the operation manager of the absorption chiller / heater opens the opening / closing valve 57 when the predetermined period elapses or at the time of the periodic inspection of the absorption chiller / heater. It flows to the storage chamber 40 of the condensed gas extraction device 37. After discharging the condensed water, the on-off valve 57 is closed, whereby the non-condensable gas flows into the non-condensable gas tank 50 again from the storage chamber 40 through the connecting pipe 48, and the hydrogen gas is discharged and the water vapor condenses as described above. And accumulates in the non-condensable gas tank 50. Here, a gas supply pipe 56 having an on-off valve 58 is connected to the non-condensable gas tank 50, and an on-off valve 49 is provided on the communication pipe 48, as in the first and second embodiments.
The condensed water discharge pipe 55 may be opened to the outside to discharge the condensed water to the outside.

According to the above embodiment, the water vapor flowing in along with the non-condensable gas is cooled and condensed by the heat exchanger 63 through which the low-temperature refrigerant liquid flows through the non-condensable gas tank 50, and the surface of the palladium cell 51, that is, the hydrogen permeable surface. It is possible to suppress the adhesion of water vapor to the palladium cell 51 and to maintain the hydrogen discharge capability of the palladium cell 51. As a result, it is possible to avoid an increase in the concentration of non-condensable gas, particularly hydrogen gas, in the equipment and to stabilize the operation of the absorption chiller / heater. Can be.

The heat exchanger 63 has a refrigerant circulation pipe 20.
, The amount of water vapor condensed in the heat exchanger 63 increases, and the amount of water vapor in the non-condensable gas tank 50 can be suppressed very slightly. As a result, the hydrogen discharge capacity of the palladium cell 51 can be reduced. Can be further improved.

[0037]

According to the present invention, there is provided a non-condensable gas discharging device constructed as in the above embodiment.
Since a heat exchanger that cools the non-condensable gas tank is provided in the middle of the refrigerant pipe where the refrigerant liquid of the condenser flows from the condenser to the evaporator, and a refrigerant evaporating mechanism is provided upstream of this heat exchanger, The water vapor that has flowed into the non-condensable gas tank together with the non-condensable gas is cooled and condensed by the heat exchanger provided in the non-condensable gas tank and through which low-temperature refrigerant vapor flows. The discharge capacity can be maintained, and as a result, the operation of the absorption refrigerator can be stabilized by avoiding an increase in the concentration of non-condensable gas, particularly hydrogen gas, in the equipment.

According to the second aspect of the present invention, a refrigerant liquid circulation pump in the middle of a refrigerant liquid circulation pipe in which a refrigerant liquid reservoir at a lower part of an evaporator and a refrigerant liquid spraying device at an upper part of an evaporator are connected. Since a heat exchanger that cools the non-condensable gas tank is provided in the middle of the refrigerant pipe that branches from the refrigerant liquid circulation pipe on the outlet side to the condenser, the steam that flows in with the non-condensable gas is provided in the non-condensable gas tank. The cooled low-temperature refrigerant liquid is cooled and condensed by the flowing heat exchanger, and the adhesion of water vapor to the surface of the hydrogen discharger, that is, the hydrogen permeable surface can be suppressed to maintain the hydrogen discharge capability of the hydrogen discharger. The operation of the absorption chiller / heater can be stabilized by avoiding an increase in the concentration of non-condensable gas, especially hydrogen gas, therein.

Further, the refrigerant liquid whose temperature has risen in the heat exchanger is returned to the condenser and flows to the evaporator together with the refrigerant liquid accumulated in the condenser, so that the temperature rise of the refrigerant liquid sprayed in the evaporator can be avoided. As a result, the cooling efficiency can be maintained in the evaporator. Furthermore, according to the invention described in claim 3, the refrigerant in the refrigerant liquid circulation pipe has a refrigerant liquid circulation pump which is connected to the refrigerant liquid reservoir in the lower part of the evaporator and the refrigerant liquid dispersion device in the upper part of the evaporator by piping. Since the liquid circulation pump outlet pipe penetrates the non-condensable gas tank, the water vapor flowing into the non-condensable gas tank together with the non-condensable gas is cooled and condensed by the refrigerant liquid circulation pipe through which the low-temperature refrigerant liquid flows. Therefore, it is possible to suppress the adhesion of water vapor to the surface of the hydrogen discharger, that is, the hydrogen permeable surface, and to maintain the hydrogen discharge capability of the hydrogen discharger. The operation of the absorption chiller / heater can be stabilized.

Further, since the entire amount of the circulating refrigerant liquid flows through the refrigerant circulation pipe 20 penetrating the non-condensable gas tank, the amount of water vapor condensed in the non-condensable gas tank increases, and the amount of water vapor in the non-condensable gas tank is reduced to a very small amount. As a result, the hydrogen discharge capability of the hydrogen discharger can be further improved. Further, according to the invention described in claim 4, after the refrigerant liquid flowing out of the condenser evaporates or the refrigerant liquid flowing out of the evaporator flows and cools the non-condensable gas tank, Since there is a gas injection pipe connected to the pipe and having an on-off valve in the middle and a condensed water discharge pipe connected to the bottom of the non-condensable gas tank and having an on-off valve in the middle, the condensed water accumulated in the non-condensable gas tank The open / close valve can be switched to open and close to discharge from the bottom of the non-condensable gas tank to the outside, preventing a large amount of condensed water from accumulating in the non-condensable gas tank and reaching the heat exchanger. And the amount of water vapor in the non-condensable gas tank can be slightly suppressed over a long period of time.

According to the fifth aspect of the present invention, there is provided a heat exchanger for cooling the non-condensable gas tank after the refrigerant liquid flowing out of the condenser evaporates or the refrigerant liquid flowing out of the evaporator flows. Since there is provided a condensed water discharge pipe having an on-off valve on the way from the bottom of the condensed gas tank to the gas extraction device, there is no need to connect a plurality of pipes having an on-off valve, and the configuration can be simplified. Since there is no need to provide a pipe or the like that communicates with the outside, the confidentiality of the absorption refrigerator can be more reliably maintained, and a decrease in operating efficiency due to non-condensable gas can be suppressed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an absorption chiller / heater showing an embodiment according to claims 1, 4 and 5 of the present invention.

FIG. 2 is a schematic configuration diagram of an absorption chiller / heater showing an embodiment according to claims 2 and 5 of the present invention.

FIG. 3 is a schematic configuration diagram of an absorption chiller / heater showing an embodiment according to claims 3 and 5 of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Evaporator 2 Absorber 4 High temperature regenerator 6 Low temperature regenerator 9 Low temperature heat exchanger 10 High temperature heat exchanger 20 Refrigerant circulation pipe 21 Refrigerant pump 37 Non-condensable gas bleeding device 48 Communication pipe 49 On-off valve 50 Non-condensable gas tank 51 Palladium cell 52 Refrigerant pipe 55 Condensed water discharge pipe 56 Gas supply pipe 57 On-off valve 58 On-off valve 61 Refrigerant pipe 62 Heat exchanger 63 Heat exchanger

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-221671 (JP, A) JP-A-3-267665 (JP, A) JP-A-60-205161 (JP, A) 122357 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F25B 43/04

Claims (5)

(57) [Claims] A non-condensable gas in an absorption chiller in which an absorber, a generator, a condenser, and an evaporator are connected by piping to form a circulation path of the absorption liquid and the refrigerant is used to extract non-condensable gas in the equipment. A gas bleeding device, a non-condensable gas tank that communicates with the gas bleed device and stores extracted non-condensable gas, and a palladium metal or a palladium metal that communicates with the non-condensable gas tank and bleeds to allow hydrogen gas in the non-condensable gas to permeate and release. In a non-condensable gas discharge device comprising a hydrogen discharger made of an alloy, a refrigerant pipe from which a refrigerant liquid of the condenser flows from the condenser to the evaporator is provided, and the non-condensable gas tank is cooled in the middle of the refrigerant pipe.
For the hydrogen emitter made of the palladium metal or its alloy
A non-condensable gas discharge device comprising: a heat exchanger for preventing steam from adhering; and a refrigerant evaporation mechanism provided upstream of the heat exchanger. 2. The non-condensable gas in the absorption chiller in which the absorber, the generator, the condenser, and the evaporator are connected by piping to form a circulation path for the absorption liquid and the refrigerant is used to extract non-condensable gas in the equipment. A gas bleeding device, a non-condensable gas tank that communicates with the gas bleed device and stores extracted non-condensable gas, and a palladium metal or a palladium metal that communicates with the non-condensable gas tank and bleeds to allow hydrogen gas in the non-condensable gas to permeate and release. In a non-condensable gas discharge device having a hydrogen discharger made of an alloy, a refrigerant liquid circulation having a refrigerant liquid circulation pump is provided by connecting a refrigerant liquid reservoir below the evaporator and a refrigerant liquid spraying device above the evaporator by piping. A refrigerant pipe provided with a heat exchanger for branching off from the refrigerant liquid circulation pipe on the outlet side of the refrigerant liquid circulation pump to the condenser and cooling the non-condensable gas tank on the way. Condensed gas discharge Location. 3. The non-condensable gas in the absorption chiller, in which the absorber, the generator, the condenser, and the evaporator are connected by piping to form a circulation path for the absorption liquid and the refrigerant, is used to extract non-condensable gas in the equipment. A gas bleeding device, a non-condensable gas tank that communicates with the gas bleed device and stores extracted non-condensable gas, and a palladium metal or a palladium metal that communicates with the non-condensable gas tank and bleeds to allow hydrogen gas in the non-condensable gas to permeate and release. In a non-condensable gas discharge device having a hydrogen discharger made of an alloy, a refrigerant liquid circulation pump having a refrigerant liquid circulation pump in the middle of connecting a refrigerant liquid reservoir below an evaporator and a refrigerant liquid spraying device above an evaporator is provided. A non-condensable gas discharge device comprising a pipe, and a refrigerant liquid circulation pump outlet side pipe of the refrigerant liquid circulation pipe penetrates the non-condensable gas tank. 4. An uncondensed gas in the absorption chiller, in which an absorber, a generator, a condenser, and an evaporator are connected by piping to form a circulation path for the absorption liquid and the refrigerant, is used to extract non-condensable gas in the equipment. A gas bleeding device, a non-condensable gas tank that communicates with the gas bleed device and stores extracted non-condensable gas, and a palladium metal or a palladium metal that communicates with the non-condensable gas tank and bleeds to allow hydrogen gas in the non-condensable gas to permeate and release. A non-condensable gas discharge device comprising a hydrogen discharger made of an alloy, a heat exchanger for cooling the non-condensable gas tank after the refrigerant liquid flowing out of the condenser evaporates or the refrigerant liquid flowing out of the evaporator flows therethrough; Non-condensable gas comprising a gas extraction pipe connected to a chamber and having an on-off valve on the way, and a condensed water discharge pipe connected to the bottom of the non-condensable gas tank and having an on-off valve on the way. Discharge Location. 5. An uncondensed gas in the absorption chiller in which an absorber, a generator, a condenser, and an evaporator are connected to each other by piping to form a circulation path for the absorption liquid and the refrigerant. A gas bleeding device, a non-condensable gas tank that communicates with the gas bleed device and stores extracted non-condensable gas, and a palladium metal or a palladium metal that communicates with the non-condensable gas tank and bleeds to allow hydrogen gas in the non-condensable gas to permeate and release. In a non-condensable gas discharge device including a hydrogen discharger made of an alloy, a heat exchanger for cooling the non-condensable gas tank after the refrigerant liquid flowing out of the condenser evaporates or the refrigerant liquid flowing out of the evaporator flows, A condensed water discharge pipe connected to a bottom of the condensed gas tank and having an on-off valve in the middle thereof.