JPH0769100B2 - Bleeding device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an extraction device, and particularly to an extraction device suitable for improving extraction performance and reliability of non-condensable gas in an absorption refrigerator and other industrial machines. It is about.

[Prior Art] As described in, for example, Japanese Utility Model Laid-Open No. 61-71874, a conventional device is provided with a solution outflow portion of an absorber liquid level holding plate provided below a heat transfer tube group of an absorber, A technique is disclosed in which a guide plate and a tubular body are provided so that the solution forms a vortex and flows out, and the non-condensable gas is continuously self-extracted together with the liquid.

Further, for example, the one described in JP-A-54-147550 is based on the self-bleeding device described above, and by fixing the liquid level holding plate to the tube plate and the shell, The height of the liquid surface is kept constant so that the non-condensable gas can be stably extracted.

[Problems to be Solved by the Invention] In the device described in Japanese Utility Model Laid-Open No. 61-71874, the non-condensable gas can be extracted together with the liquid from the liquid outlet in the absorber that was flowing the liquid (solution). Although it is configured with consideration, in order for this bleeding device to exert its bleeding ability,
The fact that the amount of liquid accumulated in the extraction device itself is an appropriate value, that the amount of liquid that flows into the extraction device is the same as the amount of liquid that flows out, and that the amount of liquid is within a certain range is all that matters. Must be in place. However, it has been difficult to maintain all of these conditions stably with the conventional device.

Therefore, the liquid level holding device described in JP-A-54-147550 was developed so that these conditions can be stably maintained even if only a little.

This device keeps the liquid level at which the non-condensed gas is sucked out constant, so that the shelf is filled with the liquid once and the excess liquid overflows from the edge to maintain the constant liquid level. By extracting the liquid from the shelf, the extraction is performed with the non-condensed gas mixed with the liquid. It is possible to bleed with this, but there was a lot of waste because extra liquid had to be poured to keep the liquid surface constant.
Further, the overflowed liquid must be recirculated by joining with the liquid mixed with the non-condensable gas in order to continue the entire cycle. As a confluence method, in the conventional device, a gap is opened in the middle of the pipe in which the liquid containing the non-condensed gas is flowing, and the liquid overflowing directly from the gap is merged with the liquid flowing in the pipe. Was there.

With this mechanism, it is possible to combine the liquids, but the non-condensable gas from the liquid flowing mixed with the non-condensable gas
The non-condensable gas returns to the original place by returning to the overflowed liquid from the gap opened in the middle of the pipe, and the bleeding capacity decreases.

Furthermore, although the diameter of the part that sucks out the liquid has a great influence on the extraction performance, it cannot be extracted because it was not an appropriate diameter, or even though the non-condensable gas was sucked out, the flow path in the middle became wide and the flow rate was high. Therefore, there is a problem that the non-condensed gas is separated from the liquid and flows backward due to the non-condensed gas, or the non-condensed gas is accumulated in the middle of the flow path and the extraction ability is deteriorated.

The present invention has been made in order to solve the above-mentioned problems in the prior art, and in extracting the air using the suction force of the vortex of the liquid, the depth of the liquid at the liquid outlet is kept constant to achieve the optimum absorption. It is a first object of the present invention to provide an extraction device that can generate vortices and maintain high extraction efficiency.

A second object of the present invention is to provide a bleeding device in which the sucked non-condensable gas does not flow back and return to its original state.

[Means for Solving the Problems] In order to achieve the above first object, the configuration of the first invention relating to the extraction device of the present invention is such that the non-condensable gas and the liquid to be extracted are present inside A container provided with a liquid outlet, a liquid circulation piping system that communicates with the liquid outlet of the container and causes the liquid to flow into the container again, and a pump means for sucking the liquid and the non-condensable gas into the liquid circulation piping system. In a bleeding device for sucking the non-condensable gas together with the liquid flowing out by generating a vortex from the liquid outlet to the liquid circulation piping system, the pipe of the circulation piping system is The non-condensable gas sucked together with the liquid from the outflow port to the pipe is set in the flow passage cross section where the flow velocity is such that the fine bubbles are kept flowing.

In addition, in order to achieve the above-mentioned second object, the configuration of the second invention relating to the extraction device of the present invention is a container in which a non-condensable gas and a liquid to be extracted are contained, and a liquid outlet is provided in the lower portion. When,
A liquid circulation piping system that communicates with the liquid outlet of the container and causes the liquid to flow into the container again, and this liquid circulation piping system includes pump means for sucking the liquid and gas-liquid separation means for separating the non-condensed gas, In a bleeding device adapted to suck out a non-condensable gas together with a liquid flowing out by generating a vortex from the liquid outlet to the liquid circulation piping system, a liquid storage container connected to the container at a communication port of a gas phase portion, and A backflow preventing means is provided for connecting the liquid storage container and a pipe line below the liquid outlet in the liquid circulation piping system.

Here, as the backflow preventing means, a U-shaped communication pipe is provided as the most basic configuration.

The technical means for achieving the above object will be described below in more detail with reference to the second invention in accordance with the concept of developing the present invention.

That is, when the liquid is sucked, the principle that the vortex formed at the fluid outlet of the container draws in and sucks the surrounding gas is applied, and the noncondensable gas is sucked together with the liquid from the outlet so that the liquid can be extracted.

At that time, a vortex that efficiently sucks the surrounding gas does not occur unless the fluid of the fluid and the depth of the liquid at the outlet are in a certain condition. Especially, since the depth of the liquid at the liquid outlet most affects the generation of the vortex, it is important to keep this depth at an appropriate level.

Therefore, if another liquid reservoir is installed at a position below the bottom where the liquid outlet is located, and if the amount of liquid fluctuates, the liquid outlet can be adjusted by adjusting the fluctuation by moving the liquid into and out of the deep reservoir. The liquid depth at was not changed. The liquid can be taken in and out of the liquid storage container by connecting a flow path in which the liquid, which is drawn out from the liquid outlet and mixed with the non-condensable gas, flows.

When the liquid volume decreases and the flow rate from the liquid outlet becomes insufficient, the liquid is naturally replenished from the liquid reservoir to the flow path. The liquid volume increases,
When the flow rate from the liquid outlet increases, the excess liquid naturally flows from the flow channel to the liquid reservoir and is temporarily stored. When there is no change in the liquid volume, the liquid does not enter or leave the liquid storage container, and the liquid amount in the liquid storage container does not change. However, if the flow path of the liquid containing the non-condensable gas and the liquid storage container are simply connected by a pipe, etc., the non-condensed gas sucked out will flow back toward the liquid storage container through the pipe of this connection. , Finally, it returns from the liquid container to the place where the original air was extracted. Therefore, it is decided to provide a U-shaped flow path in a part of the connecting portion so that the flow once flows downward and then flows back upward.

With this, the non-condensable gas becomes bubbles, and even if an attempt is made to go to the liquid storage container, there is a downward flow path on the way, so the non-condensable gas cannot flow downward to the liquid storage container under gravity. The non-condensable gas can be prevented from flowing in, and the non-condensable gas sucked out from the liquid outlet can be all extracted.

[Operation] The operation of the above technical means is
The invention of will be described.

A vortex is generated at the liquid outlet of the container, and the surrounding gas also acts so as to be drawn together with the liquid by the suction force of the vortex. This allows any low pressure non-condensable gas to be extracted.

In order to generate this vortex, the depth of the liquid at the liquid outlet must be maintained at a certain value, but if a liquid reservoir is provided separately, excess liquid will be added to the reservoir when the liquid increases. To prevent the depth of the liquid at the liquid outlet from increasing, and when the liquid becomes insufficient, it releases the liquid in the liquid reservoir and operates so that the depth of the liquid at the liquid outlet does not decrease. .

Since a U-shaped flow path is provided to allow liquid to flow into and out of this liquid storage container once to flow downward and then upward, use the fact that non-condensed gas that has been sucked in once has a low specific gravity. It works so that it does not flow backwards toward the liquid storage container, and therefore the extraction efficiency does not drop.

Further, as described above, in order to generate a deep vortex that efficiently sucks the surrounding air at the liquid outlet, the diameter of the liquid outlet must be adapted to the amount of the liquid to be sucked.

Furthermore, even if the non-condensable gas is sucked out together with the liquid, the non-condensable gas may collect in the flow path and flow back. To prevent this, the cross-sectional area of the flow
Since it is set to 0.3 m / sec or more, the non-condensable gas remains as a fine bubble without gathering, and even if there is a downward flow path, the non-condensable gas does not flow backwards and stays with the liquid. As it flows, the extraction capacity gas is not lowered.

[Embodiment] Each embodiment of the present invention will be described below with reference to FIGS. 1 to 5. The embodiment of FIGS. 1 to 3 mainly corresponds to the embodiment of the second invention.

FIG. 1 is a vertical sectional view of an extraction device according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a can body related to a container containing a non-condensable gas 8 and a liquid 9 to be extracted. The can body 1 is a portion corresponding to an absorber in, for example, an absorption refrigerator. Two
Is a liquid tank related to a liquid reservoir connected to the can body 1 via the communication port 7 of the vapor phase portion. Reference numeral 3 denotes a liquid outlet 4 provided in the lower portion of the can body 1, a U-shaped communication pipe relating to a backflow preventing means for communicating the liquid tank 2 with a pipe passage at the lower portion of the liquid outlet 5,
Is a liquid suction pipe constituting a liquid circulation piping system, and the liquid suction pipe 5 is connected to a lower portion of the liquid outlet 3 of the can body 1. Reference numeral 11 is a pump connected to the liquid suction pipe 5 provided in the liquid circulation piping system, 12 is a gas-liquid separator relating to a gas-liquid separating means for separating non-condensed gas, and this gas-liquid separator 12 is an extraction gas extraction gas. Also serves as a device. Reference numeral 16 is a liquid supply pipe forming a liquid circulation piping system.

A more detailed structure and operation of the bleeder shown in FIG. 1 will be described.

A constant amount of liquid 9 is constantly supplied to the can body 1 from a liquid supply pipe 16. At the bottom of the can body 1, a liquid outlet 3 having a diameter such that the Froude number becomes 0.3 to 0.7 with respect to the flow rate of the liquid 9 supplied.
Is provided, and the supplied liquid 9 is supplied to the liquid outlet 3
Is sucked into the liquid suction pipe 5 by driving the pump 11. Since the diameter of the hole of the liquid outlet 3 and the flow rate are matched, a deep vortex 6 is generated at the liquid outlet 3. Here, the non-condensed gas 8 is sucked into the liquid suction pipe 5 by the vortex 6 together with the liquid 9. Since the liquid suction pipe 5 has a cross section such that the mixed fluid 13 of the liquid 9 and the non-condensable gas 8 flows at 0.3 m / s or more, the liquid suction pipe 5 flows into the pump 11 in the state of small bubbles shown by 8b. The mixed fluid 13 enters the gas-liquid separator 12 through the pump 11. Here, the mixed fluid 13 separates the non-condensable gas, compresses it to atmospheric pressure, and exhausts it as the extraction gas 8a.

On the other hand, the liquid from which the non-condensable gas has been separated is again supplied to the can body 1 in the state of liquid 9 through the liquid supply pipe 16.

Although the bleeding operation can be performed for the time being, the liquid amount generally fluctuates greatly and the bleeding operation is confused. Therefore, the liquid tank 2 is attached below the can body 1, and the bottom of the liquid tank 2 and the liquid suction pipe 5 are connected by a U-shaped communication pipe 4.

Normally, when there is no fluctuation in the liquid volume, there is no liquid flowing in or out of the liquid tank 2, that is, the liquid in the U-shaped communication pipe 4 is the arrow 17a,
It is stationary without flowing in any direction of 17b. Therefore, even if the mixed fluid 13 containing the non-condensable gas sucked from the liquid outlet 3 is flowing in the liquid suction pipe 5, there is the downward flow path 4a of the U-shaped communication pipe 4, so that the non-condensing Backflow of the gas bubbles 8b into the liquid tank 2 is completely impossible due to the specific gravity. Therefore, all the non-condensable gas sucked from the liquid outlet 3 is discharged from the gas-liquid separator 12 to the atmosphere via the pump 11. At this time, since the liquid does not enter and leave the liquid tank 2, the amount of the liquid 10 in the liquid tank 2 does not change.

When the total flow rate increases, excess liquid flows from the liquid suction pipe 5 through the communication pipe 4 in the direction of arrow 17a and the liquid tank 2
Flow into. During this time, since a large amount of the liquid is sucked into the liquid outlet 3, the optimum vortex 6 cannot be formed, so the bleeding capacity is reduced, but all the excess liquid will enter the liquid tank 2.
Again, as described above, the liquid does not enter and leave the liquid tank 2, and the optimum extraction operation is performed.

On the contrary, when the total liquid amount decreases, the liquid 10 flows from the liquid tank 2 to the liquid suction pipe 5 to compensate for the shortage of the liquid amount. Then, as described above, the liquid does not come in and out of the liquid tank 2 again, and the optimum extraction operation is performed.

When the total amount of liquid increases, when the liquid flows into the liquid tank 2 from the liquid suction pipe 5, some bubbles of the non-condensable gas may flow into the liquid tank 2. However, this is only temporary and the amount of liquid does not change much, so the liquid tank 2
There is not much inflow or outflow of liquid to or from. Moreover, when the liquid flows into the liquid tank 2, it has to flow downward once at the portion 4a, so the condensed gas having a specific gravity lighter than that of the liquid floats up and cannot rise downward, resulting in the non-condensed gas. Does not flow into the liquid tank 2.

According to this embodiment, there are the following effects.

1) Since it is possible to extract air using the suction force of the vortex, it is possible to extract air up to the saturation pressure of the liquid, and if the liquid with low saturation pressure can be selected, it is possible to extract air at any low pressure.

2) The diameter of the liquid outlet 3 of the can 1 is set so that the Froude number becomes 0.3 to 0.7 with respect to the outflow amount of the liquid, so that a vortex for efficiently sucking the non-condensable gas is generated, and bleeding is performed. The efficiency can be improved.

3) Since the flow passage cross section is set so that the flow rate of the liquid containing the non-condensable gas flowing through the suction pipe 5 is 0.3 m / sec or more, the back flow of the non-condensable gas can be prevented and the extraction efficiency is kept high. it can.

4) Since the U-shaped communication pipe 4 is provided between the liquid tank 2 and the suction pipe 5, the sucked non-condensable gas does not flow back and return to the original state, so that the extraction efficiency is not lowered.

Further, since the liquid tank 2 is provided, the depth of the liquid at the liquid outlet 3 can be made constant even if the liquid amount changes, so that an optimum suction vortex can always be generated and the extraction efficiency can be kept high. .

Next, FIG. 2 is a vertical sectional view of an extraction apparatus according to another embodiment of the present invention. In the figure, those having the same reference numerals as those in FIG. 1 are the same parts as those in the previous embodiment, and therefore their explanations are omitted.

In the embodiment shown in FIG. 2, the portion of the U-shaped communication pipe 4 shown in FIG. 1 is replaced with a backflow prevention mechanism 14 having a double pipe structure. That is, the pipe line 2a connected to the bottom of the liquid tank 2
And the flow path 14a connected to the liquid suction pipe 5 have a double pipe structure, and the pipe line 2a is inserted into the flow path 14a.

According to the embodiment of FIG. 2, the same effect as that of the embodiment of FIG. 1 can be expected.

It is needless to say that this reverse prevention mechanism may be formed in a similar shape by forming a case with a curved plate or the like instead of the pipe.

Next, FIG. 3 is a vertical cross-sectional view of an extraction device according to still another embodiment of the present invention. In the figure, those having the same reference numerals as those in FIG. 1 are the same parts as those in the previous embodiment, and therefore their explanations are omitted.

In the embodiment shown in FIG. 3, the liquid tank 2A is integrally formed in the lower part of the can body 1, and the portion of the U-shaped communication pipe 4 shown in FIG.
The backflow prevention mechanism 15 having a heavy structure is integrated and miniaturized.

In FIG. 3, 7A is a communication pipe that connects the gas phase portion of the can body 1 and the liquid tank 2A. Further, in the triple pipe portion, a pipe body flow path 15a communicating with the liquid suction pipe 5 is provided around the liquid suction pipe 5, and a pipe body flow path 15b is connected to the liquid tank 2A so as to cover the pipe body flow path 15a. Are concentrically arranged with respect to the central axis of the liquid suction pipe 5.

The embodiment shown in FIG. 3 is expected to have the same effect as the embodiment shown in FIG. 1 above, and has an effect peculiar to this embodiment that the apparatus can be made compact and compact.

Each of the embodiments shown in FIGS. 1 to 3 is mainly the embodiment of the second invention of the extraction apparatus of the present invention, but an example of the extraction apparatus of the suction type refrigerator as the embodiment of the first invention. Will be described with reference to FIG.

FIG. 4 is a vertical cross-sectional view of an extraction device for a suction type refrigerator according to an application example of the present invention.

In FIG. 4, 21 is the non-condensable gas 8 and the solution to be extracted.
An absorber which is a can body containing 18 therein, 23 is a solution outlet provided in the lower part of the absorber 21, 25 is a solution suction pipe constituting a solution circulation piping system, and this solution suction pipe 25 is an absorber.
It is connected to the bottom of the solution outlet 23 of 21. 26 is a solution supply pipe constituting a solution circulation piping system, 27 is a non-condensable gas extraction pipe, 28 is a concentrated solution supply pipe, and 29a and 29b are aspirators 2
The heat transfer tube for absorption installed in 1 and 30 are refrigerant vapor ducts.

Reference numeral 31 is a pump provided in the solution circulation piping system and connected to the solution suction pipe 25, and 32 is a gas-liquid separator relating to a gas-liquid separating means for separating non-condensed gas.

A more detailed structure and operation of the extraction device of the absorption refrigerator shown in FIG. 4 will be described.

Refrigerant vapor enters absorber 21 through refrigerant vapor duct 30 connected from an evaporator (not shown). The concentrated solution (absorption liquid) supplied from the regenerator (not shown) by the concentrated solution supply pipe 28 absorbs the refrigerant vapor dispersed in the absorption heat transfer tube 29a.

After the absorbing action is completed, the solution accumulated on the bottom of the absorber 21 is sucked into the solution suction pipe 25 from the solution outlet 23. At this time, the mixed fluid 13 is pumped through the solution suction pipe 25 while forming a deep vortex 6 and entraining the surrounding non-condensed gas.
Flow into. The solution discharged from the pump 31 is a gas-liquid separator.
Enter 32. The mixed fluid 13 separates the non-condensable gas and exhausts it as the extraction gas 8a through the non-condensable gas exhaust pipe 27. Alternatively, non-condensable gas can be sent to the regenerator (not shown) side to enable bleed air.

On the other hand, the solution from which the non-condensed gas is separated is the solution supply pipe 26.
By this, the refrigerant vapor supplied to the absorber 21 again and scattered on the absorption heat transfer tube 29b is absorbed.

In this device, the non-condensable gas is drawn in at the solution outlet 23 through which the solution is sucked from the absorber 21, but by setting the hole diameter so that the Froude number of the solution at the solution outlet 23 is set to 0.3 to 0.7. , Deep vortex when sucking solution 6
Therefore, the non-condensed gas 8 is drawn into the vortex 6 so that the gas can be efficiently extracted.

The solution in which the non-condensable gas is entrained by the vortex, that is, the mixed fluid 13, is set so that the flow passage cross-section is such that the solution suction pipe 25 flows at a flow rate of 0.2 m / sec, so that the non-condensable gas does not separate and flow backward. It can be sent to the pump 31 and the gas-liquid separator 32, and the extraction of air is surely performed.

Next, as an appropriate example of the second invention, an example of the extraction device of the absorption refrigerator will be described with reference to FIG.

FIG. 5 is a cross-sectional view of an extraction device for an absorption refrigerator according to another application example of the present invention. In the figure, the same parts as those in FIG. 4 are the same parts, and therefore their explanations are omitted. The apparatus shown in FIG. 5 corresponds to the apparatus of FIG. 1 applied to an absorption refrigerator.

In FIG. 5, 22 is a solution tank related to a liquid storage container connected to the absorber 21 via the communication port 17 of the gas phase portion, and 24 is a U-shape connecting the solution tank 22 and the solution suction pipe 25. Is a communication pipe.

Further, the gas-liquid separator 32A is the gas-liquid separator 32 shown in FIG.
A double cylinder configuration with better separation performance is adopted.

The solution tank 22 has a concentration of the solution (absorption liquid) changed by a load change of the absorption refrigerator or a temperature change of the cooling water, and when the volume of the entire solution changes, for example, when the volume of the solution decreases, The solution 20 previously stored in the solution tank 22 is sent to the solution suction pipe 25 through the communication pipe 24 to compensate for the circulating amount of the solution, and the liquid surface height at the solution outlet 23 of the absorber 21 is made constant, always. I am trying to make efficient extraction. On the contrary, when the concentration of the solution becomes thin and the volume of the whole solution increases, the solution favored by the solution suction pipe 25 enters the solution tank 22 through the communication pipe 24. As a result, the liquid level at the solution outlet 23 can be made constant, and the Froude number can be kept optimal, so that efficient extraction can be performed.

Since the communication pipe 24 is U-shaped, the non-condensable gas does not flow backward from the solution suction pipe 25 to the solution tank 22 at the portion 24a, so that the extraction from the low pressure side is performed more efficiently.

In addition to the above embodiments, although not shown and described here, for example, by providing a flow rate adjusting valve in the solution supply pipe of the solution circulation piping system of the absorption refrigerator, the solution outlet of the absorber It is also possible to secure the flow rate at, and particularly in an apparatus not provided with a solution tank, the adjustment by the flow rate adjusting valve is effective.

[Effects of the Invention] As described in detail above, according to the present invention, in extracting air using the suction force of the vortex of liquid, the depth of the liquid at the liquid outlet is kept constant and the optimum suction vortex is obtained. It is possible to provide the bleeding device that can generate the bleeding and maintain the bleeding efficiency high.

Further, it is possible to provide the bleeding device in which the sucked non-condensable gas does not flow back and return to the original state.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical cross-sectional view of an extraction device according to an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of an extraction device according to another embodiment of the present invention. FIG. 4 is a vertical sectional view of an extraction apparatus according to still another embodiment of the present invention, FIG. 4 is a vertical sectional view of an extraction apparatus for an absorption refrigerator according to an application example of the present invention, and FIG. It is sectional drawing of the extraction apparatus of the absorption refrigerator which concerns on the other liquid example of this invention. 1 ... Can body, 2, 2A ... Liquid tank, 3 ... Liquid outlet, 4
...... Communication pipe, 5 ... Liquid suction pipe, 6 ... Vortex, 7 ... Communication port, 8 ... Non-condensed gas, 11 ... Pump, 12 ... Gas-liquid separator, 14,15 ... Backflow prevention Mechanism, 16 ... Liquid supply pipe, 2
1 ... Absorber, 22 ... Solution tank, 23 ... Solution outlet, 2
4 …… Communication pipe, 25 …… Solution suction pipe, 26 …… Solution supply pipe, 31 …… Pump, 32,32A …… Gas-liquid separator.

Claims (6)

[Claims] 1. A non-condensable gas and a liquid to be extracted are inherently contained,
A container having a liquid outlet in the lower part, a liquid circulation piping system that communicates with the liquid outlet of the container and causes the liquid to flow into the container again, pump means for sucking the liquid into the liquid circulation pipe system, and a non-condensable gas A gas-liquid separation means for separating the liquid, and a bleeding device configured to suck out the non-condensable gas together with the liquid flowing out by generating a vortex from the liquid outlet to the liquid circulation piping system, wherein the pipeline of the circulation piping system is The bleeding device is characterized in that the non-condensable gas sucked together with the liquid from the liquid outlet to the pipe is set to a flow passage cross section that has a flow velocity that maintains a fine bubble. 2. A non-condensable gas and a liquid to be extracted are contained internally,
A container having a liquid outlet in the lower part, a liquid circulation piping system that communicates with the liquid outlet of the container and causes the liquid to flow into the container again, pump means for sucking the liquid into the liquid circulation pipe system, and a non-condensable gas And a gas-liquid separation means for separating the gas-liquid separation means, and a non-condensable gas is sucked out together with the liquid flowing out by generating a vortex from the liquid outlet to the liquid circulation piping system. A bleeding device comprising: a liquid storage container connected by a mouth; and a backflow preventing means for connecting the liquid storage container and a pipe line below the liquid outlet of the liquid circulation piping system. 3. A non-condensable gas and a liquid to be extracted are contained internally,
A container having a liquid outlet in the lower part, a liquid circulation piping system that communicates with the liquid outlet of the container and causes the liquid to flow into the container again, pump means for sucking the liquid into the liquid circulation pipe system, and a non-condensable gas And a gas-liquid separation means for separating, in a bleeding device configured to suck out non-condensable gas while causing a vortex to flow out from the liquid outlet to the liquid circulation piping system, and a pipeline of the circulation piping system, A non-condensable gas sucked together with the liquid from the liquid outlet to the conduit is set in a flow passage cross section that has a flow velocity that maintains fine bubbles, and a liquid storage container that is connected to the container at a communication port of a gas phase section. And a backflow preventing means for communicating the liquid storage container and a pipe line at a lower part of the liquid outlet in the liquid circulation piping system. 4. The bleed air according to claim 2, wherein a U-shaped connecting pipe is provided as a backflow preventing means for connecting the liquid storage container and the pipe line below the liquid outlet. apparatus. 5. As a backflow preventing means for connecting the liquid storage container and the pipe line at the lower portion of the liquid outlet, a pipe line connected to the liquid reservoir container and a flow passage connected to the pipe line at the lower portion of the liquid outlet port are multiplexed. The extraction device according to claim 2, wherein the extraction device has a flow path configuration. 6. An absorption refrigerating machine comprising an evaporator, a condenser, an absorber, a regenerator, and a piping system for functionally connecting these parts, wherein a part of the absorber has a solution outlet, A solution circulation piping system that communicates with the solution outlet and causes the solution to flow into the absorber again, and this solution circulation piping system includes pump means for sucking the solution and gas-liquid separation means for separating the non-condensed gas. A bleeding device adapted to suck out non-condensable gas together with a liquid flowing out by generating a vortex from the outlet to the solution circulation piping system, comprising a liquid storage container connected to the absorber at a communication port of a gas phase portion, and An extraction apparatus for an absorption refrigerating machine, comprising a U-shaped pipe that connects a liquid storage container and a pipe line below a solution outlet in the solution circulation pipe system.