JP2887199B2 - Regenerator for absorption refrigeration system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerator for an absorption refrigeration system using an aqueous solution such as lithium bromide as an absorbing solution.

[0002]

2. Description of the Related Art A refrigerator main body of an absorption refrigeration apparatus is composed of a heating tank heated by a heating source such as a burner, and a medium-concentration absorbing liquid provided so as to communicate above a boiling port opened at the top thereof. A high temperature regenerator having a vertical cylindrical refrigerant vapor recovery cylinder disposed on the outer periphery of the partition cylinder is provided. In the heating tank, the low-concentration absorbing liquid is heated and boiled to a temperature of about 170 ° C., and the medium-concentration absorbing liquid that has been concentrated by evaporation of the refrigerant is stored in the medium-concentration absorbing liquid partition cylinder, and the liquefied refrigerant is collected in the refrigerant vapor recovery cylinder. A liquid forms.

[0003]

When the low-concentration absorbing liquid boils in the heating tank, it may be bumped and generate abnormal noise. Since bumping is at a lower pressure in the high-temperature regenerator than during normal operation, bumping is likely to occur at the start of operation in which bubbles of refrigerant vapor generated by boiling grow greatly. When using an absorption refrigeration system for air conditioning in a general house,
Productivity is a problem due to noise. An object of the present invention is to effectively prevent bumping of a low concentration absorbent in a heating tank,
It is an object of the present invention to provide a regenerator for an absorption refrigeration system that can always operate with low noise.

[0004]

According to the present invention, there is provided a heating source, a heating tank heated by the heating source, and a medium-concentration absorbing medium disposed in communication with a boiling port opened at the top of the heating tank. An absorption refrigerating apparatus comprising a liquid partition, a high-temperature regenerator having a refrigerant vapor recovery cylinder disposed on the outer periphery of the medium-concentration absorbing liquid partition, and a low-temperature regenerator provided on the outer periphery of the refrigerant vapor recovery tube. Wherein the porous body is attached so as to cover the boiling port.

According to a second aspect of the present invention, the porous body is a cylindrical body wound with a punching metal. In the configuration according to claim 3, the porous body includes:
It is characterized in that a wire mesh is laminated in a cylindrical case made of punched metal.

According to a fourth aspect of the present invention, a heating source, a heating tank heated by the heating source, and a medium-concentration absorbing liquid communicated above a boiling port opened at the top of the heating tank. A partition tube, and a high-temperature regenerator having a refrigerant vapor recovery cylinder disposed on the outer periphery of the intermediate-concentration absorbent partition, and a low-temperature regenerator provided on the outer periphery of the refrigerant vapor recovery tube. In the regenerator, a porous body is attached to an inner wall surface of the heating tank on the heating source side.

[0007]

The regenerator of this absorption refrigeration system is:
A porous body is attached so as to cover the boiling port, or a porous body is attached to the inner wall surface of the heating tank on the heating source side to break up bubbles to prevent bumping. For this reason, the development of bubbles in the regenerator is prevented, and the generation of abnormal noise can be prevented. As a result, the absorption refrigeration system is highly applicable to air conditioners that require low noise, such as home air conditioners.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 3, an absorption refrigeration apparatus 200 comprises a refrigerator main body 100 and a cooling tower (cooling tower) CT, and a cooling unit (indoor unit) C.
U constitutes an air conditioner attached. Refrigerator body 1
Reference numeral 00 is vertically supported by a stand (not shown).

The refrigerator main body 100 is provided with a high-temperature regenerator 1 for heating and boiling the low-concentration absorbent and separating it into medium-concentration absorbent and refrigerant vapor. As shown in FIG. 1, the high-temperature regenerator 1 extends upward from a heating tank 11 in which a gas burner B as a heating source is disposed, and a boiling port 12 opened at the top of the heating tank 11, and has an open upper end. A medium-concentration absorbent partition 13 composed of a hollow cylinder is provided, and a refrigerant vapor recovery cylinder 10 composed of a vertical cylindrical airtight container is eccentrically disposed around the intermediate-concentration absorbent partition 13. .

As shown in FIG. 2, the heating tank 11 is formed by covering a cylindrical outer cylinder 1B having a boiling opening 12 over a cylindrical shell inner cylinder 1A and welding the joint surface. . As shown in FIG. 1, the heating tank 11 includes a cylindrical skirt portion 14 having an open lower portion, and a ceiling portion 15. The inside of the skirt 14 is a combustion chamber for the gas burner B,
A porous body 2 for preventing bumping is fitted in the boiling port 12.

As shown in FIG. 2, the porous body 2 includes a plurality of highly corrosion-resistant stainless steel wire mesh filters 22 in a bottomed cylindrical case 21 formed of a highly corrosion-resistant stainless steel punching metal. It has a structure in which it is stacked, housed, covered with a cover made of punching metal, and welded to the joint surface. The hole diameter of the punching metal, the mesh of the wire mesh filter 22 and the number of layers are 3 mm in this embodiment.
The mesh is set to # 20.

The porous body 2 may be made of any material having appropriate ventilation resistance and excellent corrosion resistance.
2 may be other than a columnar shape as long as it can be effectively closed. The fixing of the porous body 2 is performed by mounting a bolt 74, which is TIG-welded to the top of the inner cylinder 1A, at the center of the porous body 2 in a mounting hole 2a.
, And the nut 75 is screwed.

FIG. 4 shows a second embodiment of the porous body 2. In this embodiment, the porous body 2 is made of a porous column 24 in which stainless steel punching metal having high corrosion resistance is spirally wound in a cylindrical shape.
And an annular flange 25 welded to its upper end surface. A cylindrical edge 26 projects upward from the inner periphery of the annular flange 25, and fits into the inner periphery of the boiling port 12. When covering the outer cylinder 1B on the inner cylinder 1A, the porous body 2
It is assembled by installing it in the center of A.

As shown in FIG.
In the lower part 131, a medium concentration absorbing liquid in which the refrigerant has evaporated to a medium concentration stays, and the refrigerant vapor separated from the low concentration absorbing liquid boiling from the upper end opening 132 is discharged from the refrigerant vapor recovery cylinder 10
Is blowing inside. A low-temperature regenerator 16 having an effect of improving thermal efficiency is provided on the outer periphery of the refrigerant vapor recovery cylinder 10.

The low-temperature regenerator 16 has a vertical cylindrical shape, a refrigerant vapor outlet 17 is opened in the ceiling, and the low-temperature regenerator case 2 is disposed concentrically with the medium-concentration absorbent partition 13.
0 is provided. In the low-temperature regenerator case 20, the middle-concentration absorbing liquid is supplied from the lower part 131 of the high-concentration middle-concentration absorbing liquid partition 13 via the heat exchanger H through the medium-concentration absorbing liquid flow path L1. The medium concentration absorbent is re-evaporated using the outer peripheral surface of the refrigerant vapor recovery cylinder 10 as a heat source, and is separated into the high concentration absorbent and the refrigerant vapor.

On the outer periphery of the low-temperature regenerator 16, an evaporating / absorbing case 30 formed of a vertical cylindrical airtight container is installed concentrically with the low-temperature regenerator 16. Evaporation / absorption case 30
Inside, an absorber 3 is provided on the inner peripheral side, and an evaporator 4 is provided on the outer peripheral side. On the outer periphery of the low-temperature regenerator 16 and above the evaporating / absorbing case 30, a condenser case 50 made of a vertical cylindrical airtight container is installed concentrically, and a cooling coil 51 is arranged inside. A condenser 5 is configured.

The absorber 3 is provided with a cooling coil 31 wound in a vertical cylindrical shape inside an evaporating / absorbing case 30 and for spraying a high-concentration absorbing liquid to the cooling coil 31 above the cooling coil 31. A high-concentration absorbent sprayer 32 is attached. The evaporator 4 has an evaporator coil 41 wound in a vertical cylindrical shape disposed on an outer portion inside the evaporator / absorber case 30, and a refrigerant liquid disperser 42 disposed above the evaporator coil 41.

The high-temperature regenerator 1, the low-temperature regenerator 16, the absorber 3, the evaporator 4, and the condenser 5 are arranged concentrically and, as shown in FIG. The main body 100 has a cylindrical shape.

In the heating tank 11, the low-concentration absorbing liquid boils due to heating by the gas burner B, and the temperature is about 170 ° C. At the start of operation when the inside of the high-temperature regenerator 1 is at a relatively low pressure, a large amount of boiling instantaneously occurs and bubbles grow together and grow. Abnormal noise having a short wavelength is generated on the absorption liquid surface in the liquid partition tube 13. In the present invention, since the porous body 2 covers the boiling port 12, bumping is reduced by subdividing all the bubbles, and generation of abnormal noise is prevented.

The bottom of the refrigerant vapor recovery cylinder 10 between the refrigerant vapor recovery cylinder 10 and the medium-concentration absorption liquid partitioning cylinder 13 serves as a refrigerant liquid receiving portion 10a in which liquefied refrigerant liquid is stored, and the refrigerant flow path L3
And communicates with the low-pressure condenser 5. This liquid refrigerant is re-evaporated in the condenser 5 and cooled by the cooling coil 51 to be re-liquefied.

Between the bottom of the absorber 3 and the bottom of the heating tank 11, a low-concentration absorbing liquid flow for returning the low-concentration absorbing liquid discharged from the absorber 3 to the heating tank 11 of the high-temperature regenerator 1. It is connected by road L2. Low concentration absorbent flow path L2
Is provided with a heat exchanger H and an absorbent pump P1.

The upper part of the low-temperature regenerator 16 is a gas-liquid separator 27, which communicates with the upper part of the condenser 5 via a gap 5A. The high-concentration absorbent receiving section 28 of the low-temperature regenerator 16 is connected to the high-concentration absorbent dispersion device 32 through the heat exchanger H by the high-concentration absorbent flow path L4.

The lower part of the condenser 5 and the evaporator coil 4 of the evaporator 4
The refrigerant liquid dispersing device 42 installed above the first liquid container 1 communicates with the refrigerant liquid supply passage L5. The refrigerant is dropped on the surface of the evaporating coil 41 from the refrigerant liquid dispersing tool 42, takes the heat of vaporization from the evaporating coil 41, evaporates, and cools the hot and cold water as a heat medium flowing inside. The evaporated vapor refrigerant is supplied to the cooling coil 3
On the surface of 1, it is absorbed by the high concentration absorbing liquid dropped from the high concentration absorbing liquid spraying tool 32. The low-absorbent liquid absorbed by the refrigerant is supplied to the heating tank 1 by the low-concentration liquid flow path L2.
Returned to 1.

The cooling coil 31 is connected to a cooling coil 51, and further connected to a cooling tower CT via a cooling water circulation path 34. The cooling water is supplied by a cooling water pump P2 to the cooling tower CT → the cooling coil 31 → the cooling coil 51 → It circulates in the order of the cooling tower CT. The evaporating coil 41 is connected to the indoor unit CU through a cold / hot water circulation path 43 having a cold / hot water pump P3.

The low-temperature low-concentration absorbent discharged from the absorber 3 is supplied to the heat exchanger H by the absorbent pump P1 and is heated after exchanging heat with the high-concentration absorbent and the medium-concentration absorbent. Is returned to the heating tank 11 and again heated and boiled. The medium-concentration absorbent in the medium-concentration absorbent partition 13 has a high temperature, is exchanged with the low-concentration absorbent in the heat exchanger H, is cooled, and is supplied to the low-temperature regenerator 16 by a pressure difference. . The high-concentration absorbent generated in the low-temperature regenerator 16 is heat-exchanged with the low-concentration absorbent in the heat exchanger H to have a low temperature, and is supplied to the high-concentration absorbent sprayer 32 with a pressure difference.

FIGS. 5 and 6 show a third embodiment. In this embodiment, a bumping suppression cover 7 which is a cylindrical shell-shaped porous body is attached along the inner wall surface of the inner cylinder 1A of the heating tank 11. A 1 mm gap is provided between the inner wall surface of the tank and the bumping suppression cover 7. The bumping suppression cover 7 is
The refrigerant vapor generated on the wall surface of the inner cylinder 1A by the heating of the gas burner B is dispersed into fine bubbles to prevent bumping.
The tank inner wall surface and the bumping suppression cover 7 may be in contact with each other.

In this embodiment, the bumping suppression cover 7 is formed by press-forming a highly corrosion-resistant stainless steel punching metal having a large number of small holes having a diameter of 2 mm.
Edge 72 provided with a plurality of notches 71 dispersed at the lower end
Is provided around. The bumping suppression cover 7 is fixed by inserting a bolt 74 that is TIG-welded to the top of the inner cylinder 1 </ b> A into the top hole 73 and screwing a nut 75. The bumping suppression cover 7 may be formed by molding a wire net or a metal bundle, or a plurality of bumping suppression covers 7 may be used in an overlapping manner.

In FIG. 5, reference numeral 29 denotes the end of the flow pipe of the low-concentration absorbent flow path L2 for returning the low-concentration absorbent to the heating tank 11, and one of the cutouts 71 of the edge 72 is inserted therethrough. It communicates with a gap (about 15 mm) between the bottom wall of the inner cylinder 1A formed below the edge 72. This is because the low-concentration absorbing liquid flows into the lower side of the edge 72, flows in the circumferential direction, and then uniformly distributes and supplies the low-concentration absorbing liquid above the heating tank 11 from another notch 71. .

FIG. 7 shows a fourth embodiment. In this embodiment, the high-temperature regenerator 1 has a pumping pipe 18 extending upward from the boiling port 12, and the medium-concentration absorbent partition 13 is connected to the pumping pipe 18.
Is provided on the outer periphery. The porous body 2 has a heating tank 1
1 is fitted so as to close the boiling port 12, the upper end of the pumping pipe 18 is closed, and a window 19 is opened on the side.
In this configuration, the bumping suppression cover 7 may be provided as in the third embodiment.

In the above embodiment, the porous body 2 is brought into contact with the wall surface of the inner cylinder 1A for the convenience of installation. It may be installed in the liquid pipe 18 away from the heating tank 11.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a heating tank portion of a regenerator of an absorption refrigeration system.

FIG. 2 is an assembly diagram of a heating tank.

FIG. 3 is a configuration diagram of an absorption refrigeration apparatus.

FIG. 4 is an assembly diagram of a heating tank according to a second embodiment.

FIG. 5 is a sectional view of a heating tank portion of a regenerator according to a third embodiment.

FIG. 6 is an assembly diagram of a heating tank according to a third embodiment.

FIG. 7 is a sectional view of a refrigerator main body according to a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High temperature regenerator 1A Inner cylinder 1B Outer cylinder 2 Porous body 3 Absorber 4 Evaporator 5 Condenser 6 Bottom plate 7 Bump suppression cover 10 Refrigerant vapor recovery cylinder 11 Heating tank 12 Boiling port 13 Medium concentration absorption liquid partitioning cylinder 16 Low temperature regeneration Container 18 Pumping tube 22 Wire mesh filter 100 Refrigerator body 200 Absorption refrigeration system B Gas burner (heating source)

Continued on the front page (72) Katsuya Oshima 2-26, Fukuzumicho, Nakagawa-ku, Nagoya-shi Inside Rinnai Corporation (72) Inventor Yasunari Furukawa 4-1-2, Hiranocho, Chuo-ku, Osaka-shi Osaka Gas Co., Ltd. (72) Inventor Toru Fukuchi 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi Inside Osaka Gas Co., Ltd. (56) References JP-A-7-190554 (JP, A) JP-A-7-190551 (JP) , A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F25B 33/00

Claims (4)

(57) [Claims] 1. A heating source, a heating tank heated by the heating source, a medium-concentration absorbent partitioning pipe arranged in communication with a boiling port opened at the top of the heating tank, and the medium concentration In a regenerator of an absorption refrigeration apparatus including a high-temperature regenerator having a refrigerant vapor recovery cylinder disposed on an outer periphery of an absorbing liquid partition cylinder and a low-temperature regenerator provided on an outer periphery of the refrigerant vapor recovery cylinder, the boiling port A regenerator for an absorption refrigeration apparatus, wherein a porous body is attached so as to cover the refrigeration system. 2. The regenerator of an absorption refrigeration system according to claim 1, wherein the porous body is a cylindrical body wound with punched metal. 3. The regenerator according to claim 1, wherein the porous body is formed by laminating a wire mesh in a cylindrical case made of punched metal. 4. A heating source, a heating tank to be heated by the heating source, a medium-concentration absorbent partitioning pipe arranged in communication with a boiling port opened at the top of the heating tank, and the medium-concentration liquid. A regenerator for an absorption refrigeration apparatus including a high-temperature regenerator having a refrigerant vapor recovery cylinder disposed on the outer periphery of the absorbent partition and a low-temperature regenerator disposed on the outer periphery of the refrigerant vapor recovery cylinder; A regenerator for an absorption refrigeration apparatus, wherein a porous body is attached to the inner wall surface on the side of the heating source.