JP2001215071A - Bleeding device and absorption refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bleeding device having high suction efficiency and reliability, and an absorption refrigerator in which cooling performance is improved by excellently bleeding the interior of an absorber or the like. SOLUTION: A bleeding device 70 comprises a bleeding tube 60 communicating with the interior of an absorber 20 which is a subject apparatus of bleeding and included in an absorption refrigerator 1. The interior of the absorber 20 is bled through the bleeding tube 60 so that a refrigerant gas RG and a noncondensable gas NC are separated from each other and recovered. A plurality of bleeding holes 60a are arranged in the bleeding tube 60 so as to be located at a downstream side in respect of the flowing direction of an absorbing solution Y in the absorber 20 and located in the flux of the solution Y.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bleeding device for bleeding the inside of a device to be bleeded, such as an absorber of an absorption refrigerator, to separate and recover refrigerant gas and non-condensable gas, and such a bleeding device. The present invention relates to an absorption refrigerator including:

[0002]

2. Description of the Related Art Conventionally, absorption chillers that use water as a refrigerant and a lithium bromide solution or the like as an absorption solution and perform a refrigerating action by a so-called absorption cycle have been widely used as air conditioning chillers, cold / hot water heaters, and the like. I have. This type of absorption refrigerator includes an evaporator, an absorber, a regenerator (a high-pressure regenerator and a low-pressure regenerator), a condenser, and the like. A low-temperature refrigerant liquid condensed in the condenser is vaporized in the evaporator. By doing so, a refrigeration action is performed. The refrigerant gas (vapor) vaporized by the evaporator is absorbed by the absorbing solution by the absorber, and the absorbing solution is supplied to the regenerator by the solution pump. The absorbing solution that has absorbed the refrigerant gas is heated by the regenerator, whereby high-pressure refrigerant gas is generated and the refrigerant gas is supplied to the condenser. The high-pressure refrigerant gas is condensed by the condenser into a low-temperature refrigerant liquid and sent to the evaporator. Also, the concentrated absorbent solution separated from the refrigerant in the regenerator is returned to the absorber.

In this case, it is necessary to maintain the inside of the absorption refrigerator at a high degree of vacuum. However, during operation of the absorption refrigerator, gas such as air may be mixed into the interior of the absorber or the interior of the absorber may be mixed. The generation of hydrogen cannot be avoided. Gases other than the refrigerant gas such as air and hydrogen (hereinafter, referred to as “non-condensable gas”) hinder the absorption of the refrigerant gas by the absorbing solution, and cause a reduction in the refrigeration capacity of the absorption refrigerator. It is. Therefore, in order to improve the refrigerating capacity of the absorption refrigerator, it is necessary to efficiently remove the non-condensable gas present inside the absorber. A bleed device is provided. As one example of the air extraction device, a so-called ejector-type air extraction device such as that disclosed in Japanese Patent Application Laid-Open No. 7-19670 is known.

[0004] This type of ejector-type bleeding device includes an outer cylinder,
And an inner cylinder disposed in the outer cylinder. An ejector unit communicating with the inside of the absorber via a bleed pipe is provided in the middle of the inner cylinder, and an absorbing solution as a driving fluid is supplied to the ejector unit by a solution pump or the like. Thereby, the refrigerant gas and the non-condensable gas inside the absorber are sucked into the ejector unit, and the air bubbles of the sucked refrigerant gas and the non-condensable gas are entrained in the absorbing solution. The gas-liquid two-phase flow that has flowed down the inner cylinder and flowed into the outer cylinder separates into gas and liquid as the flow velocity decreases, and the non-condensable gas flows into the upper layer inside the outer cylinder, and the absorbing solution that has absorbed the refrigerant gas contains the outer cylinder. Each will be stored in the lower layer inside. The non-condensable gas stored in the outer cylinder is appropriately discharged by a vacuum pump or the like.

[0005]

However, the above-described conventional bleeding device (absorption chiller) has the following problems. That is, as shown in FIG. 18, a bleed tube 101 provided in a conventional bleed device is connected to a bleed header 100 and inserted between heat transfer tubes (tube groups) 104 arranged in an absorber 103. However, only one bleed hole 102 for sucking the refrigerant gas and the non-condensable gas is provided at the end of the bleed tube 101. Therefore, when the bleeding device is operated to suck the refrigerant gas and the non-condensable gas from the bleeding tube 101, the absorbing solution flowing (downstream) in the absorber 103 is sucked into the bleeding tube 101, and the bleeding holes 102 May be closed, that is, a so-called liquid sealing phenomenon may occur. When such a liquid-ring phenomenon occurs, it becomes difficult to extract the non-condensable gas from the inside of the absorber 103, and the amount of the non-condensable gas in the absorber 103 increases. For this reason, absorption of the refrigerant gas by the absorption solution is hindered, and the refrigeration capacity of the absorption refrigerator is also reduced.

Therefore, the present invention can satisfactorily bleed the inside of a bleeding device having high suction efficiency and reliability, and a bleeding target device such as an absorber or a condenser, and can exhibit high refrigeration capacity. The purpose is to provide an absorption refrigerator.

[0007]

According to a first aspect of the present invention, there is provided a bleeding apparatus according to the present invention, comprising an bleeding pipe communicating with the inside of a bleeding target device included in an absorption refrigerator, and the bleeding device of the bleeding target device is connected via the bleeding tube. In the bleeding device that bleeds the inside and separates and recovers the refrigerant gas and the non-condensable gas, the bleeding pipe is located on the downstream side in the flowing direction of the absorbing solution in the device to be bled, and between the flux of the absorbing solution. It has a plurality of bleed holes arranged so as to be located.

[0008] The bleed tube included in the bleed device is disposed in a device to be bleed, such as an absorber. A plurality of bleed holes are arranged in the bleed tube so as to be located downstream of the absorption solution in the bleed target device in the flow direction of the absorption solution and to be located between the fluxes of the absorption solution. Thus, the absorption solution is prevented from being sucked into the bleed tube. Further, even if the absorbing solution is sucked into the bleeding tube from one of the bleeding holes, the soaked absorbing solution is discharged to the outside of the bleeding tube through another bleeding hole. The phenomenon is very effectively prevented. Therefore, this air extraction device has extremely high suction efficiency and reliability.

In this case, it is preferable that the bleeding tube is further provided with a suction regulating means for preventing the absorbing solution from being sucked from each bleeding hole.

By employing such a configuration, it is possible to extremely effectively prevent the absorption solution from being sucked into the extraction tube through the extraction hole. As the suction restricting means, it is preferable to adopt a cover member attached to the bleed tube so as to be located on the upstream side in the flow direction of the absorbing solution, a cover member projecting outward from a side portion of the bleed tube, or the like. Further, a projecting portion may be provided around the bleed hole, or a nozzle may be provided in the bleed hole. Further, a guide groove for guiding the absorbing solution away from the bleed hole may be formed on the outer peripheral surface of the bleed tube.

According to a third aspect of the present invention, in the absorption refrigerator, the refrigerant vaporized in the evaporator is absorbed into the absorption solution by the absorber, the absorption solution and the refrigerant are separated by the regenerator, and the separated refrigerant is separated. After being condensed by the condenser, in the absorption refrigerator to be vaporized again by the evaporator, the absorption refrigerator has an extraction tube communicating with the inside of the extraction target device such as an absorber, and bleeds the inside of the extraction target device through the extraction tube. A bleeding device for separating and recovering the refrigerant gas and the non-condensable gas, wherein the bleeding pipe is located on the downstream side in the flow direction of the absorbing solution in the bleeding target device, and positioned between the flux of the absorbing solution. It is characterized by having a plurality of bleed holes arranged.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a bleeding apparatus and an absorption refrigerator according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a system diagram showing an example of an absorption refrigerator according to the present invention. The absorption refrigerator 1 shown in FIG. 1 is widely applicable as an air-conditioning refrigerator, a chiller / heater, or the like. The absorption refrigeration machine 1 uses an absorption cycle in which water is used as a refrigerant R and a lithium bromide solution or the like is used as an absorption solution Y. Perform the action. That is, the absorption refrigerator 1 includes an evaporator 10, an absorber 20, a high-pressure regenerator 30, and a low-pressure regenerator 4 constituting an absorption cycle.
0, and the condenser 50 is included, and the low-temperature refrigerant liquid (water) RL condensed in the condenser 50 is vaporized in the evaporator 10 to perform a refrigeration operation.

The evaporator 10 and the absorber 20 are arranged in the same shell (high vacuum vessel) 2. A heat transfer tube 11 is disposed in the evaporator 10, and the heat transfer tube 11 is supplied with cold water W1 through a cold water inlet line L1. Further, a refrigerant pump P1 is provided for the evaporator 10, and the evaporator 10 is provided by the refrigerant pump P1.
The refrigerant liquid RL is pumped up from the inside, and the pumped-up refrigerant liquid RL is sprayed toward the heat transfer tube 11 via the refrigerant line L3. The sprayed refrigerant liquid RL is supplied to the heat transfer tube 1
1. Deprives the latent heat of vaporization from the cold water W1 circulating in 1 and vaporizes it.
Refrigerant gas (water vapor) RG flows into the absorber 20 side.

The cold water W1 flowing through the heat transfer tube 11 is discharged outside through a cold water outlet line L2. The cold water W1 flows into the heat transfer tube 11 at a temperature of, for example, 12 ° C., is cooled, and then is discharged at a temperature of, for example, 7 ° C. via a cold water outlet line L2. The cold water W1 flowing out of the evaporator 10 is used for cooling of a building or a process of a factory, and the temperature of the cold water W1 used for cooling or the like rises to, for example, 12 ° C., and is introduced into the evaporator 10 again. Is done.

Similarly, a plurality of heat transfer tubes 21 (a group of heat transfer tubes 21A) are also arranged inside the absorber 20. Cooling water W2 is supplied to each heat transfer tube 21 via a cooling water line L4. Furthermore, a first solution pump P2 is provided for the absorber 20, and an absorption solution (lithium bromide solution) Y is pumped from the inside of the absorber 20 by the first solution pump P2. Absorbed solution Y pumped up
Is sprayed toward the heat transfer tube 21 via the solution line L5. The absorption solution Y sprayed on the heat transfer tubes 21 (the heat transfer tube group 21A) absorbs the refrigerant gas RG flowing into the absorber 20, so that the concentration of the absorption solution Y decreases, and the diluted absorption solution having the reduced concentration. Y is collected at the bottom of absorber 20. The heat generated in the absorber 20 is transferred to each heat transfer tube 21.
It is collected by the cooling water W2 flowing inside.

The absorbing solution Y collected at the bottom of the absorber 20
Is pumped by the first solution pump P2 and supplied to the high-pressure regenerator 30 via the valve, the low-temperature heat exchanger 3, the solution line L6, the high-temperature heat exchanger 4, and the solution line L7. The high-pressure regenerator 30 is equipped with a furnace tube, a body housing a heat transfer tube, and a heating burner. The high-pressure regenerator 30 is supplied with a fuel gas G from a fuel gas supply device (not shown), and the fuel gas G is burned in a furnace tube. Thus, the absorption solution Y supplied to the high-pressure regenerator 30 is heated by the heating burner, and a part of the absorbed refrigerant R is vaporized, so that the concentration of the absorption solution Y is increased to a medium level.

The absorption solution Y heated by the high-pressure regenerator 30 and having an increased concentration is supplied to the low-pressure regenerator 40 via the solution line L8 and the high-temperature heat exchanger 4. A heat transfer tube 41 is disposed in the low-pressure regenerator 40.
The refrigerant gas RG vaporized in the high-pressure regenerator 30 is supplied to the refrigerant line L
9. From the solution line L6,
A solution line L10 is branched on the downstream side of the high-temperature heat exchanger 4, and a dilute absorbing solution Y is sprayed toward the heat transfer tube 41 via the solution line L10. Inside the low-pressure regenerator 40, the absorbing solution Y introduced from the high-pressure regenerator 30 and the solution line L10 is heated via the heat transfer tube 41, so that a part of the refrigerant R evaporates and the concentration of the absorbing solution Y increases. Is even higher. The absorption solution Y having a high concentration is collected at the bottom of the low-pressure regenerator 40, and is again pumped to the absorber 20 by the second solution pump P3.

The condenser 50 is disposed in the same shell 5 as the low-pressure regenerator 40, and has therein a plurality of heat transfer tubes (heat transfer tubes) to which cooling water W2 is supplied via a cooling water line L11. (Group) 51 is arranged. Then, the refrigerant gas RG that has flowed through the heat transfer tube 41 of the low-pressure regenerator 40 and has been pressurized
Is supplied into the condenser 50 via the refrigerant line L12. Thereby, the refrigerant gas RG flowing into the condenser 50
Is cooled and condensed through each heat transfer tube 51 to become a low-temperature refrigerant liquid (water) RL. This refrigerant liquid RL is supplied to the condenser 50
Due to a pressure difference and a gravity difference between the inside and the inside of the evaporator 10, the gas flows into the evaporator 10 via the refrigerant line L14. Evaporator 1
The refrigerant liquid RL collected at the bottom of 0 is, as described above,
The refrigerant is sprayed toward the heat transfer tube 11 via the refrigerant line L3 by the refrigerant pump P1.

The inside of the absorption refrigerator 1 (inside of the shells 2 and 5) configured as described above needs to be maintained at a high vacuum, but during operation of the absorption refrigerator 1, the inside of the absorber 20 is kept inside. However, it is not possible to avoid mixing of a gas such as air or generating hydrogen inside the absorber 20. The non-condensable gas NC other than the refrigerant gas RG, such as air and hydrogen, hinders the absorption of the refrigerant gas by the absorption solution Y, and causes a reduction in the refrigerating capacity of the absorption refrigerator 1. Based on this, the absorption refrigerator 1 is provided with a bleed device 70 for bleeding the inside of the absorber 20. Hereinafter, the bleeding device 70 will be described in detail.

FIG. 2 is a longitudinal sectional view of the bleeding device 70.
As shown in the figure, the bleeding device 70 includes a processing tank 71 configured as a cylindrical body (cylindrical body) having an upper end and a lower end closed. A partition plate 72 is fixed inside the processing tank 71, and the partition plate 72 allows the inside of the processing tank 71 to be connected to a bleed chamber 73 (upper quarter area) located on the upper side in the figure. , And a lower separation chamber 74.
A gas inlet 75 is provided in the bleeding chamber 73 of the processing tank 71. As shown in FIG.
2 is connected, and the pipe 62 is connected as shown in FIG.
A plurality (four) of bleeding tubes 60 communicating with the inside of the absorber 20
Is connected to the bleed header 61 to which is connected. Thereby, the bleeding chamber 73 is provided with each bleeding tube 60 and the bleeding header 6.
1 and communicate with the inside of the absorber 20 via a pipe 62.

A solution receiving plate 77 is fixed in the bleed chamber 73 of the processing tank 71. This solution receiving plate 77 is
As shown in the figure, a plurality of notches 77a are provided at a predetermined angular interval (in this case, 45 °
8 at intervals). Further, a solution supply pipe 76 connected to a solution line L15 branched from between the first solution pump P2 and the low-temperature heat exchanger 3 is provided above the processing tank 71.
Is connected. The solution supply pipe 76 reaches the inside of the bleed chamber 73 through the upper lid of the processing tank 71 and the solution receiving plate 77. A plurality of holes 76a are formed in the solution supply pipe 76 so as to be located in the vicinity of the upper side of the solution receiving plate 77, and a nozzle 78 is mounted at the tip thereof.

The nozzle 78 is formed in a cylindrical shape with a bottom as shown in FIG.
6, an aperture opening 78a having a smaller area than the internal cross section is formed. As shown in FIG. 5, the aperture opening 78a has a petal shape in which a plurality of (in this case, four) circular holes are overlapped. Therefore, the edge portion of the aperture opening 78a includes a plurality of (in this case, four) projections 78b that project inward and that are located at portions where the arcs overlap each other. Then, the edge 7 of the aperture opening 78a between the projections 78b.
8c will be formed in the shape of an arc bulging outward.
Such a nozzle 78 can be simply configured, and the inner diameter r _{1 of the} circular hole, the protrusion amount r ₂ of the protrusion 78b, and the like (see FIG. 6) can be set with high accuracy. The inner diameter r _{1 of the} circular hole and the protrusion amount r ₂ of the protrusion 78 b can be arbitrarily determined according to the size of the apparatus, the supply amount of the absorbing solution Y, and the like.

A downcomer pipe 79 extending from the center of the partition plate 72 to the lower part of the separation chamber 74 extends, and a drinking member 80 shown in FIG. . Thereby, the bleeding chamber 73 communicates with the separation chamber 74 via the mouthpiece member 80 and the downcomer 79. Mouthpiece member 8
0 has a mouth portion 81 formed in the shape of a bell mouth that opens with a both opening angle α, and the mouth portion 81 faces a nozzle 78 located above in the figure at a predetermined distance l (see FIG. 2).
reference). The mouthpiece member 80 is arranged such that the mouthpiece 81 projects from the upper surface of the partition plate 72 so that the absorption solution Y in the bleed chamber 73 flows from the surroundings.

As shown in FIG. 2, a gas-liquid separation member 82 is disposed in the separation chamber 74 at a position separated from the lower end of the downcomer 79 by a predetermined distance. An exhaust pipe 83 communicating with the upper part of the separation chamber 74 is connected to the processing tank 71. Further, a solution discharge pipe 84 is provided below the processing tank 71.
The solution discharge pipe 84 is connected to the absorber 20.
Communicates with the interior of the In addition, the nozzle 78 and the mouth part 81
And the inner diameter of the downcomer 79 can be arbitrarily determined according to the size of the apparatus, the supply amount of the absorbing solution Y, and the like. The shape of the mouth part 81, the opening angle α, the inner diameter d, and the like are such that the rising speed of the bubbles in the mouth part 81 is higher than the flow rate of the absorbing solution Y in the mouth part 81 (flow rate of the absorbing solution Y flowing down the downcomer 79). It is determined to be smaller.

Further, an ejector 85 is connected to the processing tank 71 via a pipe 86 communicating with the separation chamber 74.
The nozzle of the ejector 85 has a first solution pump P2
Solution line L1 branched from the space between the heat exchanger 3 and the low-temperature heat exchanger 3
The solution tube 88 connected to the sample No. 5 is connected (see FIG. 1).
The gas inlet 87 of the ejector 85 communicates with the inside of the condenser 50 via a pipe (not shown).

On the other hand, the extraction tube 6 provided in the extraction device 70
8, the bleed tube 60 is bent substantially in an L-shape as shown in FIG. 8 and is connected to the bleed header 61 and has a plurality of distal ends arranged in the absorber 20. It is inserted between the heat tubes 21 (heat transfer tube group 21A). A plurality (two in this case) of bleed holes 60a for sucking the non-condensable gas NC and the refrigerant gas RG is provided in each bleed tube 60 in the longitudinal direction, while the distal end is completely closed. Have been. As shown in FIG. 8, each bleed hole 60 a is located on the downstream side in the flow direction of the absorption solution Y in the absorber 20 as the bleed target device, and has a predetermined interval so as to be located between the fluxes of the absorption solution Y. It is arranged at a distance.

Next, the operation of the above-described bleeding device 70 will be described.

During the operation of the absorption refrigerator 1, a slightly supercooled absorption solution Y pumped from the inside of the absorber 20 by the first refrigerant pump P1 is supplied to the solution supply pipe 76 through the pipe L1.
5. Flow through the solution supply pipe 76. Solution supply pipe 76
A part of the absorption solution Y inside flows out of the hole 76a, flows on the solution receiving plate 77 toward the inner wall of the bleeding chamber 73, and has a notch 77a formed on the outer periphery of the solution receiving plate 77.
Flow down from The absorption solution Y flows down along the inner wall of the bleeding chamber 73, and during that time, the refrigerant gas RG existing in the bleeding chamber 73
Absorb.

When the absorbing solution Y having absorbed the refrigerant gas RG reaches the partition plate 72, it flows into the mouth 81 from the surroundings and overflows around the mouth 81. In order to make the absorption solution Y flow down along the inner wall of the bleeding chamber 73 uniformly, the solution receiving plate 7
It is preferable to appropriately provide a baffle plate between the cup 7 and the spout 81. Further, the liquid level of the absorbing solution Y in the bleeding chamber 73 is adjusted by the overflow pipe 89 communicating the bleeding chamber 73 and the separation chamber 74 so that the absorbing solution Y always overflows from the mouth 81. 2).

On the other hand, the absorbing solution Y that has not flowed out from the hole 76 a of the solution supply pipe 76 is jetted from the nozzle 78 toward the mouth 81 so as to collide with the absorbing solution overflowing from the mouth 81. Thereby, the nozzle 78
As shown in FIG. 9, at the collision portion between the absorbing solution Y ejected from the container and the absorbing solution Y overflowing at the mouth part 81,
An air pocket ap is formed, and bubbles (non-condensable gas NC and refrigerant gas RG) are drawn into the absorbing solution Y in the air pocket ap by a so-called plunging jet effect.
As a result, together with the fact that the refrigerant gas RG is absorbed by the absorbing solution Y in the bleeding chamber 73, the pressure in the bleeding chamber 73 decreases, and the non-condensation inside the absorber 20 through the gas inlet 75. The gas NC and the refrigerant gas RG are efficiently sucked into the bleed chamber 73 via the bleed pipe 60, the bleed header 61 and the like.

As described above, the bleeding device 70 uses the so-called plunging jet effect (the effect of the impinging jet).
Although the inside of the absorber 20 is bleeded, conventionally, it is preferable that the absorption solution of the blanching jet type is jetted from the nozzle to the mouth part as a jet stream without disturbance to some extent quietly. Was thought. On the other hand, the present inventors have conducted intensive studies on the plunging jet type bleeding device, and as a result, the gas-liquid interface between the jet flowing from the nozzle toward the mouth and the surrounding gas (non-condensable gas and refrigerant gas) has been found. It has been found that the bleeding performance of the bleeding device is significantly improved by forming the turbulence.

Based on this, the nozzle 7 of the bleeding device 70
8 is provided with a projection 78b functioning as a turbulent flow forming means at the edge of the throttle opening 78a. That is, when the absorbing solution Y supplied from the solution supply pipe 76 to the nozzle 78 is ejected from the throttle opening 78a, the absorbing solution Y is contracted and comes into contact with each projection 78b. Therefore, the core portion of the jet of the absorbing solution Y ejected from the throttle opening 78a includes:
There is no turbulence, and turbulence occurs only at the gas-liquid interface between the jet flowing from the nozzle 78 toward the mouth 81 and the surrounding gas (non-condensable gas NC and refrigerant gas RG). As a result,
Due to the plunging jet effect, the amount of air bubbles that are caught in the mouth part 81 increases dramatically.

In the nozzle 78 of the bleeding device 70, a throttle opening 78a is provided between the projections 78b.
Is formed in an arc shape bulging outward. Therefore, the absorbing solution Y is supplied to the throttle opening 7 of the nozzle 78.
Absorbing solution Y that comes into contact with each projection 78b when passing through 8a and becomes contracted, but passes in the vicinity of arc-shaped edge 78c
Diffuses outward with an outward velocity vector, and the cross-sectional area of the jet from the nozzle 78 slightly widens as it approaches the mouthpiece.

That is, in the case of the nozzle 78, four projections 78b are provided for the aperture opening 78a, and an edge 78c between the projections 78b is formed in an arc shape. Therefore, the cross-sectional shape of the jet flowing out of the nozzle 78 is substantially cross-shaped, and four depressions (turbulence) are formed when viewed from the cross-section. And
The depression formed in this manner functions as an air pocket for trapping air bubbles when colliding with the overflowing absorbing solution Y at the mouthpiece 81. Thus, if such a nozzle 78 is employed, the area in which the bubbles are trapped is further enlarged, and the amount of trapped bubbles in the mouth portion 81 can be further increased.

In this way, the absorbing solution Y in which the bubbles of the non-condensable gas NC and the refrigerant gas RG are entrained in the mouth 81,
The gas flows down the downcomer pipe 79 and collides with the gas-liquid separation member 82. As a result, the absorbing solution Y that has absorbed the refrigerant gas and the non-condensable gas NC are separated, and the absorbing solution Y is stored in the lower part of the separation chamber 74, and the non-condensable gas NC is stored in the upper part of the separation chamber 74. . The non-condensable gas NC in the separation chamber 74 is discharged by a vacuum pump through an exhaust pipe 83, and the absorption solution Y in the separation chamber 74 is returned into the absorber 20 through a solution discharge pipe 84.

During operation of the absorption refrigerator 1, the ejector 8
5 is supplied with the absorbing solution Y pumped from the inside of the absorber 20 by the first refrigerant pump P1 via the pipe L15 and the solution pipe 88. Therefore, the ejector 85 uses the absorbing solution Y as a driving fluid to connect the condenser 50 through the gas inlet 87.
The internal non-condensable gas NC and the like are sucked. The non-condensable gas NC sucked by the ejector 85 is entrained in the absorbing solution Y flowing down from the nozzle portion, and is separated into gas and liquid in the separation chamber 74 of the processing tank 71. Since the internal pressure of the condenser 50 is relatively high, the non-condensable gas inside the condenser 50 can be satisfactorily extracted by such an ejector 85. Although not shown, it is preferable that the bleeding pipe provided for the condenser 50, which is the bleeding target device, be configured similarly to the bleeding pipe 60 shown in FIG.

As described above, the bleeding device 70 has high bleeding performance and can be configured very simply, so that it can be configured at low cost. Therefore, in the absorption refrigerator 1, the inside of the absorber 20 is efficiently bled,
Since the non-condensable gas NC that hinders the absorption of the refrigerant gas RG can be satisfactorily removed, it is possible to improve the refrigeration capacity while suppressing an increase in overall cost.

Each bleeding pipe 60 provided in the bleeding device 70 is located on the downstream side in the flowing direction of the absorbing solution Y in the absorber 20, which is a device to be bleeding, and has a A plurality of bleed holes 60 to be located
a is provided. Thereby, it is reduced that the absorbing solution Y is sucked into the bleeding tube 60. Further, even if the absorbing solution Y is sucked into the bleeding tube 60 from any one of the bleeding holes 60a, the sucked absorbing solution Y is discharged to the outside of the bleeding tube 60 through another bleeding hole 60a. Therefore, the so-called liquid sealing phenomenon is extremely effectively prevented. Therefore, the extraction device 70 has extremely high suction efficiency and reliability.

Here, the bleeding tube 60 has a structure shown in FIGS.
It is preferable to further provide a suction restricting means for preventing the absorption solution Y from being sucked from each of the bleed holes 60a as shown in FIG. By employing such a configuration, it is possible to extremely effectively prevent the absorption solution Y from being sucked into the bleed tube 60 through the bleed hole 60a.

The embodiment shown in FIG. 10 employs a cover member 65 attached to the bleed pipe 60 so as to be located on the upstream side in the flow direction of the absorbing solution Y as the suction restricting means. The cover member 65 has an arc-shaped cross-sectional shape having a radius larger than the inner radius of the bleed tube 60, and the bleed tube 60 is positioned such that the convex side is located on the upstream side in the flowing direction of the absorbing solution Y.
Fixed to As a result, the absorbing solution Y that has collided with the upper surface of the cover member 65 flows down along the upper surface of the cover member 65 and moves away from the bleed hole 60a, and is absorbed into the bleed tube 60 via the bleed hole 60a. It is possible to extremely effectively prevent the solution Y from being sucked. In this case, as shown in FIG. 11, the same effect can be obtained by fixing a cover member 65A that protrudes outward to the side of the bleed tube 60.

In the embodiment shown in FIGS. 12 and 13, a bulge 66 is provided around each bleed hole 60a as suction restricting means. In this case, the overhang portion 66 is provided with the bleed hole 60a.
The bleed tube 60 extends along the edge of
Attached to. As a result, the absorption solution Y is removed from the bleed tube 6
Even if it collides with the upper part of zero and flows down along the surface of the bleed tube 60, it is possible to extremely effectively prevent the absorption solution Y from being sucked through the bleed hole 60a.

In the embodiments shown in FIGS. 14 to 16, a suction control nozzle is provided in the bleed hole 60a as suction control means. The suction regulating nozzle 67A shown in FIG. 14 is formed in a straight tubular shape (cylindrical shape). The suction regulating nozzle 67B shown in FIG. 15 is configured by joining a bell-mouth-shaped member below a relatively short straight cylinder (cylindrical body). Further, the suction regulating nozzle 67C shown in FIG. 16 is formed in a bell mouth shape, and is directly mounted on the bleed hole 60a. In any of these configurations, the absorption solution Y that collides with the upper part of the bleed tube 60 and flows down along the surface of the bleed tube 60 is extremely effectively prevented from being sucked from the bleed hole 60a. be able to.

In the embodiment shown in FIG. 17, the absorption solution Y is provided on the outer peripheral surface of the bleeding pipe 60 as a suction restricting means.
A guide groove 86 for guiding the member away from the guide groove 86 is formed. In this case, the guide groove 68 is formed so as to move away from the bleed hole 60a as going from the upper portion to the lower portion of the bleed tube 60. Even with such a configuration, it is possible to extremely effectively prevent the absorption solution Y from being sucked through the bleed holes 60a.

[0045]

Since the bleeding device according to the present invention is constructed as described above, the following effects are obtained. That is, in the bleeding pipe communicating with the inside of the bleeding target device included in the absorption refrigerator, a plurality of the bleeding tubes are located downstream of the absorption solution in the bleeding target device in the flow direction of the absorption solution, and positioned between the absorption solution fluxes. By providing the bleed holes, it is possible to realize a bleed device having high suction efficiency and reliability. In addition, if such an extraction device is provided in the absorption refrigerator, it is possible to satisfactorily extract the inside of the extraction target device such as the absorber or the condenser and improve the refrigeration capacity.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an absorption refrigerator according to the present invention.

FIG. 2 is a vertical sectional view of an air extraction device provided in the absorption refrigerator shown in FIG.

FIG. 3 is a perspective view showing an absorption refrigerator according to the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 2;

FIG. 5 is a longitudinal sectional view of a nozzle provided in the bleeding device shown in FIG.

FIG. 6 is a bottom view of the nozzle shown in FIG.

FIG. 7 is a front view of a drinking member provided in the air extraction device shown in FIG. 2;

FIG. 8 is a cross-sectional view showing a bleed pipe provided in the bleed apparatus shown in FIG. 2 and the like.

FIG. 9 is a schematic diagram for explaining a bleeding mechanism in the bleeding device shown in FIG. 2;

FIG. 10 is a perspective view showing a first embodiment of the suction regulating means.

FIG. 11 is a sectional view showing a second embodiment of the suction regulating means.

FIG. 12 is a side view showing a third embodiment of the suction regulating means.

13 is a sectional view taken along line XIII-XIII in FIG.

FIG. 14 is a side view showing a fourth embodiment of the suction regulating means.

FIG. 15 is a side view showing a fifth embodiment of the suction regulating means.

FIG. 16 is a side view showing a sixth embodiment of the suction regulating means.

FIG. 17 is a side view showing a seventh embodiment of the suction regulating means.

FIG. 18 is a sectional view showing a conventional bleed tube.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Absorption refrigerator, 10 ... Evaporator, 20 ... Absorber, 30 ...
High pressure regenerator, 40 ... low pressure regenerator, 50 ... condenser, 60 ...
Bleed tube, 60a Bleed hole, 61 Bleed header, 62 Pipe, 65, 65A Cover member, 66 Overhang, 67
A, 67B, 67C: Nozzle, 68: Guide groove, 70: Bleed device, 71: Processing tank, 72: Partition plate, 73: Bleed chamber,
74: separation chamber, 75: gas inlet, 76: solution supply pipe, 7
7 solution receiving plate, 78 nozzle, 78a throttle opening,
78b: Projection, 78c: Edge, 79: Downcomer, 80:
Mouth member, 81: Mouth portion, 82: Gas-liquid separation member, 83 ...
Exhaust pipe, 84: solution discharge pipe, 85: ejector, 86: pipe, 87: gas inlet, 88: solution pipe, 89: overflow pipe, NC: non-condensable gas, RG: refrigerant gas, Y: absorption solution.

Claims (3)

[Claims] 1. A bleeding pipe communicating with the inside of a bleeding target device included in an absorption refrigerator, and bleeding the inside of the bleeding target device through the bleeding tube to separate refrigerant gas and non-condensable gas. In the bleeding device to be collected, the bleeding pipe is located on the downstream side in the flowing direction of the absorbing solution in the bleeding target device, and has a plurality of bleeding holes arranged so as to be located between the fluxes of the absorbing solution. A bleeding device characterized by having: 2. The bleeding device according to claim 1, wherein the bleeding tube is further provided with a suction regulating means for preventing the absorbing solution from being sucked from each of the bleeding holes. 3. The refrigerant vaporized by the evaporator is absorbed by the absorption solution by the absorber, the absorption solution and the refrigerant are separated by the regenerator, and the separated refrigerant is condensed by the condenser, and then again by the evaporator. In the absorption refrigerator to be vaporized, it has a bleed tube communicating with the inside of the bleed target device such as the absorber, and bleeds the inside of the bleed target device through the bleed tube to form a refrigerant gas and a non-condensable gas. A bleeding device for separating and recovering, wherein the bleeding pipe is located on the downstream side in the flow direction of the absorbing solution in the bleeding target device, and a plurality of bleeding tubes arranged so as to be located between the flux of the absorbing solution. An absorption refrigerator having pores.