JP3113195B2 - Bleeding device for absorption refrigeration system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a technique for extracting non-condensable gas in an absorption refrigeration system using an aqueous solution of lithium bromide as an absorbing solution.

[0002]

2. Description of the Related Art An absorption refrigeration cycle uses a highly corrosive absorption liquid as a working fluid. Therefore, the absorption refrigeration cycle generates insoluble non-condensable gas such as hydrogen gas by corrosion. The non-condensable gas generated in the absorption refrigeration cycle is gradually accumulated in the absorber having the lowest internal pressure in the absorption refrigeration cycle. Therefore, the internal pressure of the absorber and the evaporator increases due to the presence of the non-condensable gas.
As a result, there arises a problem that the boiling point of the refrigerant in the evaporator rises, the evaporation ability decreases, and the refrigeration capacity of the absorption refrigeration cycle decreases.

[0003] Therefore, conventionally, there has been proposed an air extraction device for extracting non-condensable gas generated in the absorption refrigeration cycle from the absorption refrigeration cycle. This bleeding device separates the non-condensable gas (including the vaporized refrigerant) extracted from the absorption refrigeration cycle and the absorbent into an auxiliary absorber, and separates the non-condensable gas discharged from the auxiliary absorber from the absorbent. And a non-condensing tank for storing the non-condensable gas separated by the gas-liquid separator.

[0005] As shown in FIG. 5, the auxiliary absorber 100 includes:
A gas introduction passage 101 for introducing non-condensable gas in the absorption refrigeration cycle together with the vaporized refrigerant; and an absorption liquid introduction passage 10 for introducing the absorption liquid in the absorption refrigeration cycle.
2 is provided. In addition, the auxiliary absorber 100 is provided with a gas-liquid discharge passage 1 for allowing the gas and the absorbing liquid introduced therein to flow alternately.
03. Further, the auxiliary absorber 100 itself had a container shape such as a cylindrical shape or a box shape.

[0005]

The vaporized refrigerant sucked into the auxiliary absorber 100 together with the non-condensable gas is absorbed by the absorbing liquid supplied into the auxiliary absorber 100 and discharged from the gas-liquid discharge passage 103. Only non-condensable gas is used. Then, when the vaporized refrigerant is absorbed by the absorption liquid in the auxiliary absorber 100, absorption heat is generated.

Here, in the conventional auxiliary absorber 100, a cooling water pipe 104 is joined to the auxiliary absorber 100 to stably remove the heat of absorption generated in the auxiliary absorber 100, and to vaporize the absorbing liquid as a refrigerant. It was provided so as to prevent a decrease in absorption capacity.

Further, the conventional auxiliary absorber 100 includes a gas introduction passage 101 and an absorption liquid introduction passage 10 in the auxiliary absorber 100.
2 and the gas-liquid discharge passage 103 are joined by welding,
Further, it is necessary to join the cooling water pipe 104 to the auxiliary absorber 100 by brazing. For this reason, the auxiliary absorber 10
0 is difficult to manufacture, resulting in high manufacturing costs.

Further, since the conventional auxiliary absorber 100 is installed outside the absorption refrigeration cycle, when airtight leakage occurs in each welded portion, air enters into the absorption refrigeration cycle, and the absorption refrigeration cycle is stopped. Ability will be reduced. Then, the auxiliary absorber 100 was arrange | positioned in an absorption-type refrigeration cycle, the joining part by welding was joined by brazing, and the means to make joining work easy was devised.

However, when the auxiliary absorber 100 is arranged in the absorption refrigeration cycle, it is necessary to route the cooling water pipe 104 for removing heat from the auxiliary absorber 100 in the absorption refrigeration cycle. Also, a cooling water pipe 1 for removing heat from the auxiliary absorber 100
04 needs to be joined to another cooling water pipe such as an absorption heat exchanger in the absorption refrigeration cycle.

As a result, assembling becomes difficult as a result, causing a problem that productivity is extremely deteriorated. Further, if the auxiliary absorber is excessively cooled, a problem that the absorption liquid (such as lithium bromide) crystallizes due to supercooling and blocks the flow path is likely to occur, and the supercooling lowers the efficiency of the refrigeration cycle.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bleeding device for an absorption refrigeration system in which an auxiliary absorber can be easily assembled in an absorption refrigeration cycle. Another object of the present invention is to provide a bleeding apparatus that can prevent overcooling of the auxiliary absorber and improve thermal efficiency under all operating conditions.

[0012]

SUMMARY OF THE INVENTION The present invention provides a regenerator for heating a low-concentration absorbent by a heating means to vaporize a refrigerant to produce a high-concentration absorbent and a refrigerant. A condenser that cools and liquefies, a liquefied refrigerant dispersing tool and an evaporating heat exchanger in which cold and hot water flows as a heat medium inside the evaporation absorption container are arranged, and the liquefied refrigerant liquefied by the condenser is reduced in pressure. An evaporator for dispersing and evaporating the evaporator under the evaporator, an evaporator for evaporating the evaporator, a high-concentration absorbent sprayer, and an absorptive heat exchanger in which cooling water for exhaust heat flows. Absorbing the vaporized refrigerant evaporated by the evaporator into the high-concentration absorbent while dispersing the high-concentration absorbent in the absorption heat exchanger; and absorbing the vaporized refrigerant in the absorber. An absorbent pump for pumping the reduced-concentration absorbent to the regenerator is provided. An absorption refrigeration cycle, a gas introduction passage for introducing non-condensable gas in the absorption refrigeration cycle together with a vaporized refrigerant, and an absorption liquid introduction passage for introducing an absorption liquid in the absorption refrigeration cycle. Auxiliary absorber having a gas-liquid discharge passage for allowing the separated gas to flow out together with the absorbent, a non-condensable gas tank for storing non-condensable gas, and a gas separated from the gas flowing out of the gas-liquid discharge passage and the absorbent, and separated. And a bleeding device including a gas-liquid separator that returns the separated absorbent to the absorption refrigeration cycle, wherein the liquefied refrigerant is taken in from the liquefied refrigerant spraying tool. A liquefied refrigerant distribution channel that was sprayed to the evaporating heat exchanger after being brought into contact with the auxiliary absorber was provided.

According to the second aspect of the present invention, the liquefied refrigerant branch is provided for taking the liquefied refrigerant from the refrigerant cooler and bringing the liquefied refrigerant into contact with the auxiliary absorber and then spraying the liquefied refrigerant to the heat exchanger for evaporation. In the configuration according to claim 3, the evaporating heat exchanger and the absorbing heat exchanger are separated by a partition wall having a vent, and the auxiliary absorber is brought into contact with the absorber side wall of the partition wall. attachment,
The liquefied refrigerant distribution channel was brought into contact with the evaporator side wall of the partition wall. In the configuration according to the fourth aspect, flow rate adjusting means such as a spring pin and an orifice is provided in the liquefied refrigerant branch channel.

[0014]

In the bleeding device of the present invention, an appropriate amount of the liquefied refrigerant is taken into the liquefied refrigerant distribution channel, and cools the auxiliary absorber. The cooled liquefied refrigerant is sprayed from the lower end of the liquefied refrigerant distribution channel to the evaporative heat exchanger and used for cooling the hot and cold water. Since the temperature of the liquefied refrigerant is as low as about 5 ° C., the auxiliary absorber can be efficiently cooled with a small amount of the liquefied refrigerant. Further, since the liquefied refrigerant is reused for cooling the hot and cold water, a decrease in the efficiency of the refrigeration cycle is minimized.

Further, there is no need to join a cooling water pipe for removing absorbed heat to the auxiliary absorber. As a result, there is no need to arrange a cooling water pipe for cooling the auxiliary absorber inside the evaporator or the absorber, and it is not necessary to join the cooling water pipe to other cooling water pipes. The performance is improved.

According to the third aspect of the present invention, the auxiliary absorber is disposed in contact with the absorber side wall of the partition wall, and is cooled by the liquefied refrigerant flowing down in the liquefied refrigerant distribution channel provided in contact with the evaporator side of the partition wall. Is done. For this reason, the piping of the liquefied refrigerant distribution channel can be simplified. In the configuration of the fourth aspect, the intake amount of the liquefied refrigerant is adjusted by the flow rate adjusting means, and an appropriate amount of the liquefied refrigerant can be divided by a simple structure.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An absorption type air conditioner including a bleed device according to the present invention will be described with reference to an embodiment shown in FIGS. FIG. 2 is a schematic configuration diagram of an absorption air conditioner using a double effect absorption refrigeration system for performing indoor air conditioning.

(Schematic description of absorption type air conditioner 1) The absorption type air conditioner 1 to which the present embodiment is applied is a relatively small type used for home use or the like. A heating means 2 for heating a lithium bromide aqueous solution) and a double effect absorption refrigeration cycle 3 are provided. The absorption refrigeration cycle 3 includes indoor air conditioning means 4 for air-conditioning the room with cooled or heated cold / hot water (a heat medium for cooling and heating the room, water in this embodiment), and vaporization in the absorption refrigeration cycle 3. A cooling water cooling means 5 for cooling the cooling water used for cooling and liquefying the refrigerant (steam in this embodiment) is provided. Each electric functional component mounted on these is controlled by the control device 6.

(Explanation of Heating Means 2) The heating means 2 of the present embodiment is a gas combustion device which burns a gas as a fuel to generate heat and heats the absorbing liquid by the generated heat. The heating means 2 includes a gas burner 11 for burning gas, a gas supply means 12 for supplying gas to the gas burner 11, and a combustion fan 13 for supplying air for combustion to the gas burner 11.
And so on. Then, the heat obtained by the gas combustion of the gas burner 11 heats the boiler 14 of the absorption refrigeration cycle 3 to heat the low-concentration absorption liquid (hereinafter, low liquid) supplied into the boiler 14. Is provided.

(Description of Absorption Refrigeration Cycle 3) The absorption refrigeration cycle 3 includes a heating means 2, a boiler 14 heated by the heating means 2, a high temperature regenerator 15 and a low temperature regenerator 16, a high temperature regenerator 15 and A condenser 17 for cooling and liquefying the vaporized refrigerant (steam) from the low-temperature regenerator 16; an evaporator 18 for evaporating the liquefied refrigerant (water) liquefied by the condenser 17 under a pressure close to vacuum; And an absorber 19 for absorbing the vaporized refrigerant evaporated by the device 18 into the high-concentration absorbing liquid (hereinafter referred to as high liquid) obtained by the low-temperature regenerator 16.

A high-temperature regenerator that evaporates (evaporates) a refrigerant (water) contained in the low liquid by heating the low liquid supplied into the boiler 14 to produce a medium-concentration absorbing liquid (hereinafter, medium liquid). 15 is provided. Above the high-temperature regenerator, a low-temperature regenerator 1
6 are provided. The low temperature regenerator 16 is a high temperature regenerator 1
Utilizing the heat of condensation of the vaporized refrigerant in 5, the medium liquid supplied from the high-temperature regenerator 15 using the pressure difference is heated, and the refrigerant contained in the medium liquid is vaporized to make the medium liquid a high liquid. I do.

(Explanation of the high-temperature regenerator 15)
Is a boiler 1 for heating the low liquid by the heating means 2.
4, and a boiling cylinder 21 extending upward from the boiler 14
Is provided. The vaporized refrigerant that has been boiled in the boiler 14 and the boiling cylinder 21 and vaporized from the low liquid is blown out from the boiling cylinder 21 into the cylindrical high-temperature regeneration container 22. The high-temperature vaporized refrigerant blown into the high-temperature regeneration container 22 is
Through the second wall, heat is taken away as heat of vaporization when the middle liquid in the low-temperature regenerator 16 evaporates and is cooled to become a liquefied refrigerant (water).

In the high-temperature regenerating vessel 22, the medium liquid in the boiling cylinder 21 after the refrigerant in the low liquid has been vaporized by being heated by the boiler 14 and the liquefied refrigerant (water) stored in the surroundings are insulated. For this purpose, a heat insulating partition tube 24 is provided around the boiling tube 21. The heat insulating partition tube 24 has an upper end joined to the upper end of the boiling tube 21, a lower end provided with a gap from the boiling tube 21, and provided such that air enters between the boiling tube 21 and the heat insulating partition tube 24. Have been. The liquefied refrigerant (water) liquefied in the high-temperature regeneration container 22 and separated outside the heat insulating partition tube 24 is guided to the condenser 17 through a liquid refrigerant pipe 25 connected to a lower portion.

(Explanation of the low-temperature regenerator 16)
Includes a cylindrical low-temperature regeneration container 31 covering the high-temperature regeneration container 22. On the other hand, the middle liquid in the boiling cylinder 21 is supplied to the low-temperature regenerator 16 through a middle liquid pipe 26 connected to a lower part of the boiling cylinder 21. The middle liquid pipe 26 is provided with a throttle means 27 such as an orifice. This aperture means 27
When the cooling / heating switching valve 53 described later is closed, the medium flows while maintaining the pressure difference between the high-temperature regenerator 15 and the low-temperature regenerator 16. Do not shed.

In the low-temperature regenerator 16, the intermediate liquid supplied through the intermediate liquid pipe 26 is injected toward the ceiling of the high-temperature regeneration container 22. Since the temperature in the low-temperature regeneration container 31 is lower than the temperature of the high-temperature regeneration container 22, the pressure in the low-temperature regeneration container 31 is lower than the pressure in the high-temperature regeneration container 22. Therefore, the middle liquid supplied from the middle liquid pipe 26 into the low-temperature regeneration container 31 is easily evaporated. Then, when the middle liquid is injected into the ceiling of the high temperature regeneration container 22, the middle liquid is heated by the wall of the high temperature regeneration container 22, and a part of the refrigerant contained in the middle liquid evaporates to become a vaporized refrigerant, Becomes high liquid.

Here, the upper part of the low-temperature regeneration container 31 communicates with the upper part of the condensing container 32 in the shape of an annular container through a communication part 33. Therefore, the vaporized refrigerant evaporated in the low-temperature regeneration container 31 is supplied into the condensation container 32 through the communication portion 33. On the other hand, the high liquid falls to the lower part of the low temperature regeneration container 31 and is supplied to the absorber 19 through the high liquid pipe 34 connected to the lower part of the low temperature regeneration container 31. In addition, the low temperature regeneration container 3
1, a ceiling plate 35 is provided.
A gap 36 through which the vaporized refrigerant passes is provided between the outer peripheral end of 5 and the low temperature regeneration container 31.

(Explanation of the Condenser 17) The condenser 17 is covered by an annular container-shaped condensing container 32. Inside the condensing container 32, a condensing heat exchanger 37 for cooling and liquefying the vaporized refrigerant in the condensing container 32 is arranged. The condensing heat exchanger 37 is an annular coil through which cooling water flows. The vaporized refrigerant supplied from the low-temperature regenerator 16 into the condensing container 32 is supplied to the condensing heat exchanger 3.
The mixture is cooled and liquefied by 7 and dropped below the condensing heat exchanger 37.

On the other hand, a refrigerant is supplied to the lower side of the condensing container 32 from the high-temperature regenerator 15 through the liquid refrigerant pipe 25. When the supplied refrigerant is supplied into the condensing container 32, it reboils due to a difference in pressure (in the condensing container 32, at a temperature of slightly over 40 ° C and a low pressure of about 70 mmHg), and the vaporized refrigerant and the liquefied refrigerant are re-boiled. Are supplied in a mixed state. Further, a liquid refrigerant supply pipe 38 for guiding the liquefied refrigerant to the evaporator 18 is connected to the condensation container 32. The liquid refrigerant supply pipe 38 is provided with a refrigerant valve 39 for adjusting the supply amount of the liquefied refrigerant supplied from the condensation container 32 to the evaporator 18.

(Explanation of the evaporator 18) The evaporator 18 is provided at the lower part of the condensing container 32 together with the absorber 19, and is constituted by an annular-shaped evaporating absorption container 41 provided around the low-temperature regeneration container 31. Covered. An evaporation heat exchanger 42 for evaporating the liquefied refrigerant supplied from the condenser 17 is disposed outside the inside of the evaporation absorption container 41. This evaporating heat exchanger 42 is an annular coil,
Cold and hot water (heat medium) supplied to the indoor air-conditioning means 4 inside
Flows. Then, the liquefied refrigerant supplied from the condenser 17 via the liquid refrigerant supply pipe 38 flows from the annular liquefied refrigerant spraying tool 43 disposed above the evaporating heat exchanger 42 onto the evaporating heat exchanger 42. Sprayed.

Since the inside of the evaporative absorption container 41 is kept substantially in a vacuum (for example, 6.5 mmHg at a temperature of about 5 ° C.), the boiling point is low, and the liquefied refrigerant sprayed to the evaporating heat exchanger 42 is greatly evaporated. It's easy to do. The liquefied refrigerant sprayed on the evaporating heat exchanger 42 evaporates by removing heat of vaporization from the heat medium flowing in the evaporating heat exchanger 42. As a result, the heat medium flowing in the evaporating heat exchanger 42 is cooled. And
The cooled heat medium is guided to the indoor air conditioner 4 to cool the room.

(Explanation of the Absorber 19) The absorber 19 is covered with the evaporation absorption container 41 as described above. The absorber 19 is provided inside the evaporative absorption container 41 with the high liquid pipe 3.
An absorption heat exchanger 44 for cooling the high liquid supplied from 4 is arranged. The heat exchanger 44 for absorption is an annular coil, and the inside thereof is supplied with cooling water for cooling the high liquid sprayed on the coil. After passing through the heat exchanger 44 for absorption, the cooling water passes through the heat exchanger 37 for condensation of the condenser 17 and is guided to the cooling water cooling means 5 to be cooled. Then, the cooling water cooled by the cooling water cooling means 5 is guided again to the absorption heat exchanger 44.

On the other hand, on the upper part of the absorption heat exchanger 44, there is arranged an annular absorbent dispersion device 45 for dispersing the high liquid supplied from the high liquid pipe 34 to the absorption heat exchanger 44. The high liquid sprayed on the absorption heat exchanger 44, while traveling down the coil surface of the absorption heat exchanger 44 and falling from above to below, removes the vaporized refrigerant generated by evaporation in the evaporation heat exchanger 42. Absorb. As a result, the absorption liquid that has fallen to the bottom of the evaporative absorption container 41 becomes a low-concentration liquid.

Inside the evaporation absorption container 41, a cylindrical partition wall 4 is provided between the evaporation heat exchanger 42 and the absorption heat exchanger 44.
6 are arranged. The cylindrical partition wall 46 communicates with the inside of the evaporation absorption container 41 only at the upper side, and the vaporized refrigerant generated by the evaporator 18 is guided into the absorber 19 through the upper part of the cylindrical partition wall 46. .

A low liquid pipe 47 for supplying the low liquid at the bottom of the evaporative absorption container 41 to the boiler 14 is connected to the bottom of the evaporative absorption container 41. The low liquid pipe 47 is provided with a solution pump 48 for flowing the low liquid from the inside of the evaporation absorption container 41 in a substantially vacuum state toward the boiler 14.

(Explanation of Other Components in Absorption Refrigeration Cycle 3) Reference numeral 51 shown in FIG.
A high-temperature heat exchanger 51 for exchanging heat between the medium liquid flowing from inside to the low-temperature regenerator 16 and the low liquid flowing from the absorber 19 to the boiler 14.
a, and a low-temperature heat exchanger 51b for exchanging heat between the high liquid flowing from the low-temperature regenerator 16 to the absorber 19 and the low liquid flowing from the absorber 19 to the boiler 14.

It should be noted that the high-temperature heat exchanger 51a is
This cools the middle liquid flowing from the absorber to the low-temperature regenerator 16 and conversely heats the low liquid flowing from the absorber 19 to the boiler 14. The low-temperature heat exchanger 51b cools the high liquid flowing from the low-temperature regenerator 16 to the absorber 19 and heats the low liquid flowing from the absorber 19 to the boiler 14.

The absorption refrigeration cycle 3 of this embodiment is provided with heating operation means for performing a heating operation in addition to the cooling operation by the above-described operation. The heating operation means includes a heating pipe 52 for guiding the high-temperature absorbing liquid from the lower part of the boiling cylinder 21 to a lower part of the evaporator 18, and a cooling / heating switching valve 53 for opening and closing the heating pipe 52. The cooling / heating switching valve 53 opens during the heating operation to guide the high-temperature absorbing liquid into the evaporating / absorbing container 41 and heat the cold / hot water flowing in the evaporating heat exchanger 42 of the evaporator 18.

(Explanation of the indoor air-conditioning means 4)
Is forcibly exchanging heat between the cold and hot water passing through the indoor heat exchanger 54 installed in the room and the evaporator 18 flowing through the indoor heat exchanger 54 and the room air, and blowing the air after the heat exchange into the room. And an indoor fan 55 for causing the indoor fan 55 to operate.

A cold / hot water circuit 56 for circulating cold / hot water is connected to the indoor heat exchanger 54. The cold / hot water circuit 56 is provided with a cold / hot water pump 57 for circulating cold / hot water. The cold / hot water pump 57 is driven by a motor that also drives the solution pump 48.

The cold / hot water circuit 56 is a water pipe that guides the cold / hot water that has passed through the evaporator 18 to the indoor heat exchanger 54 and guides the cold / hot water that has exchanged heat with the room air to the evaporator 18 again. Inside, the indoor heat exchanger 54 and the cold / hot water pump 57
In addition, a cis-turn 58 for storing cold / hot water and having a function as an expansion tank at the time of heating and for refilling cold / hot water in the cold / hot water circuit 56 is provided.

A water supply pipe 59 for supplying cold / hot water (tap water) to the inside is connected to the cistern 58. In this water supply pipe 59, supply of cold and hot water into the cistern 58,
A water supply valve 60 for stopping is provided. The cistern 58 includes a water level sensor (not shown).
To open and refill the cistern 58 with cold and hot water. Further, the cistern 58 is provided with overflow water supply means 59a for guiding the overflowed cold / hot water into a cooling water tank 65 described later.

(Description of Cooling Water Cooling Means 5) The cooling water cooling means 5 includes an evaporative cooling tower 61, a cooling water circuit 62 for circulating cooling water, and a cooling water for circulating cooling water in the cooling water circuit 62. A pump 63 is provided. The cooling tower 61 allows the cooling water that has passed through the absorber 19 and the condenser 17 to flow downward from above, exchange heat with the outside air while flowing, and release heat, and partially evaporate while flowing. The cooling water flowing at the time of evaporation is deprived of heat of vaporization, and the flowing cooling water is cooled.

In this embodiment, the cooling tower 61 includes a spraying section 61a for spraying the cooling water upward, an evaporating section 61b having a large surface area through which the cooling water flows, and a collecting section for collecting the cooling water passing through the evaporating section 61b. 61c. The cooling tower 61 includes a cooling water fan 64 that generates an airflow in the evaporating section 61b and promotes evaporation and cooling of the cooling water in the evaporating section 61b.

The cooling water circuit 62 passes the cooling water having passed through the absorber 19 and the condenser 17 and having the increased temperature to the cooling tower 6.
1 and sends the cooling water cooled by the cooling tower 61 to the absorber 19 and the condenser 17 again. In the cooling water circuit 62, in addition to the cooling tower 61 and the cooling water pump 63,
A cooling water tank 65 for storing cooling water is provided.

The cooling water tank 65 is installed below the cooling tower 61 and below the cistern 58,
The cooling water passing through 1 is supplied, and the water overflowing in the cistern 58 is supplied. The cooling water tank 65 is provided with a water level sensor (not shown). When the level of the cooling water in the cooling water tank 65 decreases, the water supply valve 60 is opened to overflow the water from the cistern 58, and the overflowed water is supplied to the overflow water supply means. 59
The cooling water is supplied to the inside of the cooling water tank 65 from a.

(Explanation of the control device 6) The control device 6 includes the above-described refrigerant valve 39, solution pump 48 (cold / hot water pump 57),
Electric functional parts such as the indoor fan 55, the cooling / heating switching valve 53, the water supply valve 60, the cooling water pump 63, the cooling water fan 64, and the electric functional parts of the heating means 2 (combustion fan 1
3. Gas control valve 66, gas on-off valve 67, ignition device 68
) Is controlled in accordance with an operation instruction of a controller (not shown) manually set by a user or an input signal of each of a plurality of sensors.

(Explanation of the bleeding device 70) Absorption type air conditioner 1
As shown in FIG. 1, a gas extraction device 70 is provided for extracting and storing non-condensable gas such as hydrogen generated by the action of corrosion in the absorption refrigeration cycle 3 from the absorption refrigeration cycle 3. The bleeding device 70 includes an auxiliary absorber 7 that allows the non-condensable gas extracted from the absorption refrigeration cycle 3 and the absorbing liquid to flow down.
1, a gas-liquid separator 72 for separating the non-condensable gas flowing out of the auxiliary absorber 71 from the absorbing liquid, and a gas-liquid separator 7
Non-condensable gas tank 7 for storing the non-condensable gas separated in 2
And 3.

The auxiliary absorber 71 is disposed inside the absorber 19 (in this embodiment, inside the evaporative absorption container 41 and inside the cylindrical partition wall 46). A gas introduction passage 74 for introducing condensed gas (in the present embodiment, non-condensable gas accumulated in the lower portion of the absorber 19) together with the vaporized refrigerant is provided, and an absorption liquid (in this embodiment, absorption in the absorption refrigeration cycle 3) is used. An absorbent introduction passage 75 for introducing a part of the high liquid dropped from the absorbent sprayer 45 above the vessel 19, and a gas-liquid discharge passage 76 for letting out the introduced gas and the absorbent are provided. .

The auxiliary absorber 71 is also shown in FIGS. 3 and 4 and has a flat shape provided by combining two press-formed plates 71a. Pumping pipe 7 constituting liquid discharge passage 76
6a is brazed together with the two press-formed plates 71a while being sandwiched between the two press-formed plates 71a.

On the other hand, the high liquid (absorbing liquid) supplied to the auxiliary absorber 71 is supplied from the absorbing liquid introduction passage 75 to the auxiliary absorber 71.
In this embodiment, the liquid is introduced into the absorbing liquid introduction passage 7.
As shown in FIG. 4, the liquid tube 75 a that forms the upper end of the liquid pipe 75 a is connected to the absorbent sprayer 45, and a funnel-shaped connection port 75 b provided at the upper end of the auxiliary absorber 71 (FIGS. 3 and 4). ), And the high liquid is supplied to the auxiliary absorber 71.
It is provided so as to be dropped inside. An orifice 75c for adjusting the flow rate of the high liquid supplied to the auxiliary absorber 71 is joined to the downstream end of the absorbing liquid introduction passage 75 by brazing.

As shown in FIGS. 3 and 4, the two press-formed plates 71a are combined to form an auxiliary absorber 71 into which a non-condensable gas containing a vaporized refrigerant and a high liquid (absorbent) are introduced. Is formed, and a gas passage 7 that guides the gas supplied from the lower bleed pipe 74 a to above the auxiliary absorber 71.
4b (part of the gas introduction passage 74) and a connection port 74c (FIG. 4).
), And a funnel-shaped connection port 75b that receives a drop of high liquid from the absorption liquid introduction passage 75 is formed.

Further, the two press-formed plates 71a are combined to provide a siphon-type gas-liquid suction portion 76b (part of the gas-liquid discharge passage 76) and a connection port 76d. The gas-liquid suction unit 76b is inclined upward from the gas-liquid suction port 76c, and then hangs down. The gas-liquid suction unit 76b is connected to a hanging pumping tube 76a, and is connected to a gas-liquid separator 72 disposed below the auxiliary absorber 71. Is done.

For this reason, the liquid level of the absorbing liquid in the auxiliary absorber 71 rises and reaches the uppermost liquid level of the gas-liquid suction part 76b, and the absorbing liquid is united by the siphon action to form the gas-liquid discharging passage 76. When the gas passes through and falls into the gas-liquid separator 72, the gas in the auxiliary absorber 71 is sucked into the gas-liquid discharge passage 76 together with the high liquid (absorbing liquid). When the gas in the auxiliary absorber 71 is sucked into the gas-liquid discharge passage 76, the non-condensable gas accumulated in the lower part of the absorber 19 is removed by the gas introduction passage 74.
Through the auxiliary absorber 71.

On the other hand, the auxiliary absorber 71 is formed by using fasteners such as metal fittings or screws, or by joining such as brazing or welding to the absorber side wall surface 46a inside the cylindrical partition wall 46.
Is fixed in contact with The liquefied refrigerant spraying tool 43 is provided with a liquefied refrigerant distribution channel 8 for cooling the auxiliary absorber 71. The liquefied refrigerant distribution channel 8 extends through the bottom of a horizontally installed annular liquefied refrigerant spraying tool 43 and forms a liquefied refrigerant intake port. Refrigerant flow pipe 82 connected to
Having.

The liquefied refrigerant flow pipe 82 is fixed to the evaporator side wall surface 46b outside the cylindrical partition wall 46 by screwing, welding or the like, and the evaporator side wall surface 46b itself is used as one surface of a box. It extends downward through a rectangular box-shaped heat transfer box 84 in which a through hole 83 is formed in the up-down direction, and the lower end is arranged to be directed above the middle coil of the evaporating heat exchanger 42. In this embodiment, the heat transfer box 84 is provided with the auxiliary absorber 71 that is in contact with the absorber side wall surface 46a of the cylindrical partition wall 46.
Is disposed on the evaporator side wall surface 46b corresponding to the above.

Since the cylindrical partition wall 46 itself conducts heat, it is not always necessary to arrange the heat transfer box 84 and the auxiliary absorber 71 in a corresponding manner, but the corresponding arrangement allows efficient heat conduction. The flow rate of the liquefied refrigerant is adjusted by the spring pins 81 and flows into the liquefied refrigerant flow pipe 82, and cools the evaporator side wall surface 46 b in the heat transfer box 84. It should be noted that the flow rate may be adjusted using other restricting means such as an orifice instead of the spring pin 81.

Thus, the auxiliary absorber 71 is cooled through the cylindrical partition wall 46. The liquefied refrigerant is applied to the evaporator side wall surface 4.
After cooling the cooling water 6b, it is sprayed on the middle coil of the evaporating heat exchanger 42, and takes the heat of vaporization from the cold and hot water flowing inside to vaporize and cool the cold and hot water. The auxiliary absorber 71 absorbs heat generated inside (heat generated when the vaporized refrigerant is absorbed by the high liquid), and absorbs the heat by the low-temperature liquefied refrigerant flowing down in the liquefied refrigerant flow pipe 82 for cooling. Thus, the temperature rise of the auxiliary absorber 71 is prevented.

(Description of Non-Condensable Gas Tank 73) The non-condensable gas tank 73 is a container disposed outside the absorption refrigeration cycle 3 as shown in FIG. ing. The non-condensing gas tank 7
3 is provided with a maintenance valve (not shown), through which non-condensable gas is extracted at a predetermined time.

(Description of gas-liquid separator 72) Gas-liquid separator 72
As shown in FIG. 1, is disposed below the auxiliary absorber 71 and the non-condensable gas tank 73, separates the gas flowing out of the gas-liquid discharge passage 76 from the absorbing liquid, and separates the separated gas into a gas discharge passage 78a. Through the non-condensable gas tank 73,
The separated absorbent is returned into the absorber 19 of the absorption refrigeration cycle 3 through the absorbent return passage 78b.

The gas-liquid separator 72 of this embodiment includes a small-diameter pipe 79 extending from the gas-liquid discharge passage 76 and a small-diameter pipe 7.
9 is composed of only a large-diameter pipe 78 (a pipe constituting the absorbent return passage 78b). The small-diameter pipe 79 and the large-diameter pipe 78 are formed in a U-shape.

The large-diameter pipe 78 has the same liquid level as that of the low liquid in the absorber 19, and the upper side of the liquid level is the gas discharge passage 7.
8a, the lower side is an absorbent return passage 78b. The upper end of the small-diameter pipe 79 is set below the liquid level, and the non-condensable gas discharged from the small-diameter pipe 79 rises in the absorbing liquid, is separated, and is guided into the non-condensable gas tank 73 through the gas discharge passage 78a. . Note that the upper end of the small diameter pipe 79 may be set above the liquid level.

[Operation of Embodiment] Next, the absorption type air conditioner 1
The operation of the cooling operation and the operation of the air extraction device 70 at the time of performing the cooling operation will be described. (Explanation of the operation of the cooling operation) When the absorption air conditioner 1 is started, the heating means 2 and the absorption refrigeration cycle 3 are operated by the operation of the electric functional components. Absorption refrigeration cycle 3
In other words, when the heating means 2 heats the boiler 14, the high-temperature regenerator 15 takes out the vaporized refrigerant from the low liquid, and the low-temperature regenerator 16 takes out the high liquid from the middle liquid.

The vaporized refrigerant taken out by the high-temperature regenerator 15 and the low-temperature regenerator 16 is condensed and liquefied by the condenser 17 and then dispersed to the evaporator heat exchanger 42 of the evaporator 18 to be evaporated. The heat of vaporization is taken from the cold and hot water in 42 to evaporate. Therefore, the cooled hot and cold water that has passed through the evaporating heat exchanger 42 and is cooled is supplied to the indoor heat exchanger 54 of the indoor air conditioner 4 to cool the room.

The vaporized refrigerant evaporated in the evaporator 18 passes above the cylindrical partition wall 46 and flows into the absorber 19.
On the other hand, in the absorber 19, the high liquid taken out by the low-temperature regenerator 16 is sprayed to the absorption heat exchanger 44 via the absorbing liquid spraying tool 45, and the vaporized refrigerant flowing from the evaporator 18 into the high liquid. Is absorbed.

The absorption heat generated when the vaporized refrigerant is absorbed by the high liquid is absorbed by the absorption heat exchanger 44, so that the absorption capacity is prevented from lowering. The high liquid that has absorbed the vaporized refrigerant in the absorber 19 becomes a low liquid, is sucked by the solution pump 48, is returned into the boiler 14, and repeats the above cycle.

(Explanation of the operation of the air extraction device 70) During the above cooling operation by the absorption refrigeration cycle 3, the vaporized refrigerant evaporated in the evaporator 18 passes above the cylindrical partition wall 46 and flows into the absorber 19. The non-condensable gas in the absorption refrigeration cycle 3 introduced into the evaporative absorption container 41 while being mixed with the high liquid and the refrigerant by the air flow (see the arrow A in FIG.
Accumulates at the bottom of

On the other hand, when the above-described cooling operation by the absorption refrigeration cycle 3 is being performed, a part of the high liquid supplied to the absorbent sprayer 45 of the absorber 19 is joined to the absorbent sprayer 45. The liquid is supplied into the auxiliary absorber 71 from the liquid pipe 75a constituting the absorbing liquid introduction passage 75 through the orifice 75c.

The high liquid supplied into the auxiliary absorber 71 is collectively sucked into the gas-liquid discharge passage 76 by the siphon action of the gas-liquid suction portion 76b, and the gas-liquid discharge passage 7
6 falls to the gas-liquid separator 72 below. When the high liquid falls together below the gas-liquid discharge passage 76, the gas in the auxiliary absorber 71 falls into the gas-liquid separator 72 together with the absorbing liquid.

When the gas in the auxiliary absorber 71 is sucked into the gas-liquid discharge passage 76, the non-condensable gas accumulated in the lower part of the absorber 19 together with the vaporized refrigerant passes through the auxiliary absorber 71 via the gas introduction passage 74. It is sucked in. The vaporized refrigerant guided into the auxiliary absorber 71 is absorbed by the high liquid and generates absorption heat. The absorption heat is transferred to the liquefied refrigerant distribution channel 8 for cooling the auxiliary absorber 71 through the cylindrical partition wall 46. Heat is absorbed by the liquefied refrigerant flowing through the inside, and the temperature rise of the auxiliary absorber 71 is prevented.

Thus, the absorption capacity in the auxiliary absorber 71 is maintained, and the bleeding capacity is maintained. As described above, the vaporized refrigerant among the gases guided into the auxiliary absorber 71 is absorbed by the high liquid. And the remaining non-condensable gas is
When the high liquid passes through the gas-liquid suction part 76b and falls as a unit, a siphon action is performed, the high liquid is sucked into the gas-liquid discharge passage 76 via the gas-liquid suction part 76b, and falls into the gas-liquid separator 72 together with the high liquid. I do.

The non-condensable gas and high liquid that have fallen into the gas-liquid separator 72 are separated by the gas-liquid separator 72, and the separated non-condensable gas is stored in the non-condensable gas tank 73, and the separated high liquid is absorbed. It is returned to the lower part of the vessel 19.

[Effect of Embodiment] The auxiliary absorber 71 in the bleeding device 70 is disposed inside the absorber 19, and the heat of absorption generated in the auxiliary absorber 71 is released to the liquefied refrigerant in the liquefied refrigerant branch channel 8. You. Since the liquefied refrigerant flowing in the liquefied refrigerant distribution channel 8 has a low temperature of about 5 ° C., it has a high cooling capacity. For this reason, a compact and sufficient cooling capacity can be obtained as compared with those using cooling water. Further, the liquefied refrigerant flowing down the liquefied refrigerant branch channel 8 after cooling the auxiliary absorber 71 is dropped into the evaporating heat exchanger 42 and is effectively used for cooling the hot and cold water. Will be maintained.

Further, since it is not necessary to join a cooling water pipe for removing the absorbed heat to the auxiliary absorber 71, the cooling water pipe for cooling the auxiliary absorber 71 is connected to the cooling water pipe (absorption heat exchanger). 44), it is not necessary to handle the inside of the evaporative absorption container 41, the assembling becomes easy, and the productivity is improved. That is, the production cost can be reduced by improving the productivity.

The cooling water pipe is generally formed using a copper material, and the auxiliary absorber 71 is formed using a stainless material having excellent corrosion resistance. For this reason, when the cooling water pipe using the copper material is joined to the auxiliary absorber 71 using the stainless steel, corrosion between different metals occurs. However, in the present invention, since the cooling water pipe is not joined to the auxiliary absorber 71, corrosion between different metals does not occur in the auxiliary absorber 71, and the reliability of the absorption air conditioner 1 can be improved.

On the other hand, the auxiliary absorber 7 in the bleed device 70
Since 1 is disposed inside the absorber 19, welding is not required as a joining means of the gas introduction passage 74 and the gas-liquid discharge passage 76 of the auxiliary absorber 71, and brazing or caulking can be performed. Further, the liquid pipe 7 forming the absorption liquid introduction passage 75
5a is not joined, and the liquid pipe 75a of the absorption liquid introduction passage 75
There is no need to perform welding as a joining means between the and the orifice 75c, and brazing is sufficient. Therefore, the auxiliary absorber 71
This facilitates the production when joining the respective joints, and can reduce the production cost.

Even if airtight leakage occurs at each joint of the auxiliary absorber 71, the portion where the airtight leakage occurs is the absorber 19
, It is possible to prevent air from entering the absorption refrigeration cycle 3. That is, the auxiliary absorber 71
There is no problem that air enters from above, and the reliability of the absorption air conditioner 1 can be improved.

The auxiliary absorber 71 is connected to two press-formed plates 71
Since it is provided flat along with a, it is possible to avoid an increase in the volume of the absorber 19 accommodating the auxiliary absorber 71. Further, an auxiliary absorber 71 formed by combining two press-formed plates 71a and a bleed tube 74a forming a gas introduction passage 74
And the pumping tube 76a forming the gas-liquid discharge passage 76 are joined by integral brazing, so that only one joining is required, and as a result, the manufacturing cost is reduced.

The auxiliary absorber 71 is provided by the siphon action of the gas-liquid suction portion 76b provided in the gas-liquid discharge passage 76.
The non-condensable gas inside is sucked into the gas-liquid discharge passage 76, and the gas in the absorber 19 can be guided into the auxiliary absorber 71 through the gas introduction passage 74 by the action. Therefore, a device (for example, a pump device) for guiding the non-condensable gas in the absorption refrigeration cycle 3 to the auxiliary absorber 71 and the gas-liquid separator 72 becomes unnecessary, and the non-condensable gas is supplied to the non-condensable gas tank 73.
The cost for extracting the oil can be kept low.

In the above embodiment, the non-condensable gas is
Although the example in which the gas inlet passage 74 is provided so as to accumulate at the lower portion of the gas inlet 9 and the gas suction passage 74 is provided at the lower portion of the absorber 19 is shown, non-condensable gas is supplied to other portions (for example, the upper portion of the absorber). It may be provided so as to store the gas, and an opening for sucking the gas in the gas introduction passage 74 may be provided in a portion where the non-condensable gas is stored.

In the above-described embodiment, the double effect absorption refrigeration cycle 3 has been described as an example of the absorption refrigeration cycle. However, a single effect absorption refrigeration cycle may be used.
A triple effect or more multi-effect absorption refrigeration cycle may be used.
When injecting the middle liquid into the low-temperature regenerator, the low-temperature regenerator 1
Although the example of injecting from above is shown above, it is also possible to inject from below.

As a heating source of the heating means 2, a gas burner 11
However, an oil burner or an electric heater may be used, or exhaust heat of another device (for example, an internal combustion engine) may be used. Although the example in which the heat exchanger for condensation 37, the heat exchanger for evaporation 42, and the heat exchanger for absorption 44 are provided in a coil shape has been described, other types of heat exchangers such as a tube and fin or a stacked heat exchanger are used. May be used.

Although an aqueous solution of lithium bromide is shown as an example of the absorbing solution, other absorbing solutions such as an aqueous ammonia solution using ammonia as a refrigerant and water as an absorbent may be used. As an example of the heating medium, tap water is used and the cooling water of the cooling water circuit 62 is shared with the cooling water circuit 62, but another heating medium such as antifreeze or oil different from the cooling water of the cooling water circuit 62 may be used. .

In addition to the above embodiment, as shown in FIG. 2, a refrigerant liquid receiver 91 is provided below the condensing heat exchanger 37 in the condensing container 32 of the condenser 17 and the evaporator in the evaporating absorption container 41 is provided. A refrigerant cooler 92 may be provided above the refrigerant spraying tool 43 of the eighteenth embodiment, and the liquefied refrigerant branch channel 8 may be connected to the refrigerant cooler 92. Note that the refrigerant liquid receiver 91 and the refrigerant cooler 92 are connected by a liquid refrigerant flow passage 93, and the bottom of the condensing container 32 and the refrigerant cooler 92 are connected by the liquid refrigerant supply pipe 38. .

A liquid refrigerant of about 40 ° C. to 45 ° C. flows into the refrigerant cooler 92 from the liquid refrigerant passage 93 or the liquid refrigerant supply pipe 38, and a part of the liquid refrigerant evaporates due to the low pressure in the evaporation absorption container 41. Due to this evaporation, the remainder of the liquid refrigerant is deprived of heat of vaporization and is cooled. By so-called self-cooling, the temperature of the liquid refrigerant drops to about 5 ° C. The liquid refrigerant cooled to about 5 ° C. flows down from the liquid refrigerant outlet to the liquefied refrigerant spraying tool 43. In this embodiment, the liquid refrigerant outlet is also connected to the liquefied refrigerant branch 8. In this configuration, the same effect as above can be obtained.

In the above embodiment, the evaporator side wall surface 46b of the cylindrical partition wall 46 is used as a constituent wall of the liquefied refrigerant distribution channel 8, and the liquefied refrigerant is brought into direct contact with the evaporator side wall surface 46b for cooling. However, the liquefied refrigerant distribution channel 8 may be provided separately and brought into contact with the evaporator side wall surface 46b. Further, the liquefied refrigerant distribution channel 8 may be brought into direct contact with the auxiliary absorber 71 without passing through the cylindrical partition wall 46.

FIG. 6 shows another embodiment. In this embodiment, the high temperature regenerator 15 is connected to the evaporator 1 from the top of the evaporator 14.
Reference numeral 41 extends upward, and the boiling cylinder 21 is provided on the outer periphery of the pumping tube 141. The bleed apparatus of the present invention can be applied to this type of absorption refrigeration apparatus.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a bleeding device.

FIG. 2 is a schematic configuration diagram of an absorption type air conditioner.

FIG. 3 is a side view of an auxiliary absorber.

FIG. 4 is a perspective view of a main part of the bleeding device.

FIG. 5 is a side view of an auxiliary absorber (prior art).

FIG. 6 is a schematic configuration diagram of an absorption type air conditioner of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Absorption air conditioner 2 Heating means 3 Absorption refrigeration cycle 8 Liquefied refrigerant distribution channel 15 High temperature regenerator 16 Low temperature regenerator 17 Condenser 18 Evaporator 19 Absorber 41 Evaporation absorber 42 Evaporator heat exchanger 43 Liquid refrigerant disperser 44 Absorption heat exchanger 48 Solution pump 70 Bleed device 71 Auxiliary absorber 72 Gas-liquid separator 73 Non-condensing gas tank 74 Gas introduction passage 75 Absorption liquid introduction passage 76 Gas-liquid discharge passage 91 Refrigerant liquid receiver 92 Refrigerant cooler

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toru Fukuchi 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi Inside Osaka Gas Co., Ltd. (72) Inventor Shinsuke Takahashi 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi No. Osaka Gas Co., Ltd. (56) References Japanese Utility Model Sho 63-63666 (JP, U) Japanese Utility Model Sho 47-7180 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 43/04

Claims (4)

(57) [Claims] 1. A regenerator for heating a low-concentration absorbent by a heating means to vaporize a refrigerant to produce a high-concentration absorbent and a refrigerant, a condenser for cooling and liquefying the vaporized refrigerant generated by the regenerator, A liquefied refrigerant spraying tool and an evaporating heat exchanger through which cold and hot water flows as a heat medium are arranged in the evaporation absorption container,
An evaporator for spraying the liquefied refrigerant liquefied in the condenser to the evaporating heat exchanger under a low pressure to evaporate the liquid; An absorber for dispersing the vaporized refrigerant evaporated in the evaporator in the high-concentration absorbent while dispersing the high-concentration absorbent in the absorption heat exchanger; and An absorption refrigeration cycle equipped with an absorption pump for absorbing the vaporized refrigerant in the absorber to reduce the concentration of the absorbed liquid to the regenerator, and introducing the non-condensable gas in the absorption refrigeration cycle together with the vaporized refrigerant. An auxiliary absorber provided with a gas introduction passage for introducing the absorption liquid in the absorption refrigeration cycle, and a gas-liquid discharge passage for allowing the introduced gas to flow out together with the absorption liquid. Stores condensed gas A gas-liquid separator that separates a gas and an absorbing liquid flowing out of the gas-liquid discharge passage, guides the separated gas to the non-condensing gas tank, and returns the separated absorbing liquid to the absorption refrigeration cycle. In the absorption refrigeration apparatus having a bleeding device comprising: a liquefied refrigerant diverting channel that takes in the liquefied refrigerant from the liquefied refrigerant spraying tool, and contacts the auxiliary absorber, and then sprays the liquefied refrigerant to the evaporation heat exchanger. An absorption refrigeration apparatus characterized by the above-mentioned. 2. The evaporator according to claim 1, further comprising a refrigerant cooler that self-cools the liquefied refrigerant supplied from the condenser and supplies the liquefied refrigerant to the refrigerant liquid sprayer, An absorption refrigeration system, which takes in a liquefied refrigerant from a refrigerant cooler. 3. The partitioning device according to claim 1, wherein the evaporating heat exchanger and the absorbing heat exchanger are separated by a partition wall having a vent. An absorption refrigerating apparatus, wherein a liquefied refrigerant distribution channel is attached in contact with the side wall of the absorber and the evaporator side wall of the partition wall. 4. The evaporating heat exchanger according to claim 2, wherein the evaporating heat exchanger is an evaporating coil wound in a vertical cylindrical shape and through which cold and hot water flows. A cooling coil that is concentrically arranged on the inner periphery, is wound in a vertical cylindrical shape, and through which cooling water flows, wherein the partition wall is a vertical cylindrical body that is arranged between the evaporating coil and the cooling coil. The liquefied refrigerant spraying device sprays the liquefied refrigerant on the upper end of the evaporating coil, the liquefied refrigerant branch channel is provided with a flow rate adjusting means, and drops the liquefied refrigerant at an intermediate position of the evaporating coil. Characteristic absorption refrigeration equipment.