JP3340301B2 - Absorption refrigeration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigerating apparatus using an aqueous solution of lithium bromide or the like as an absorbing liquid.

[0002]

2. Description of the Related Art An absorption refrigerating apparatus includes a burner, a heating tank for heating and boiling a low-concentration absorbing liquid by the burner, a medium-concentration absorbing liquid separating cylinder extending upward from the top of the heating tank, and A high-temperature regenerator comprising a refrigerant recovery tank disposed on the outer periphery of the absorption liquid separation cylinder and collecting refrigerant vapor, a low-temperature regenerator having a low-temperature regenerator case disposed on the outer periphery of the refrigerant recovery tank, and a refrigerant condenser. And a refrigerator main body in which an evaporator and an absorber having an evaporative absorption case arranged on the outer periphery of the low temperature regenerator case are integrated.

A cooling tower (cooling tower) for circulating cooling water in a condenser and an absorber is provided in the refrigerator body.
Are arranged side by side to form an absorption refrigeration system. This absorption refrigeration apparatus is housed in a box-shaped casing to constitute an outdoor unit of the absorption air conditioner. A heat exchanger is mounted in the evaporator of the refrigerator main body, and cold and hot water as a heat medium circulates between the indoor unit and an absorption air conditioner.

[0004] The refrigerator body includes a blower for forcibly supplying combustion air to the burner, and an absorbent pump for absorbing the refrigerant in the absorber and returning the reduced concentration absorbent to the heating tank from the bottom of the absorber. In addition, a cold / hot water pump for circulating cold / hot water between the evaporator and the indoor unit is provided.

[0005]

The absorption refrigeration system uses a corrosive absorption liquid as a working fluid, and is required to have robustness to withstand long-term use. As a result, ease of assembly and maintenance becomes important in practical use. An object of the present invention is to provide an absorption refrigeration apparatus that can be easily maintained and assembled.

[0006]

According to a first aspect of the present invention, there is provided a refrigerator having a high temperature regenerator, a low temperature regenerator, a refrigerant condenser, an evaporator, and an absorber mounted on a substrate provided on a casing. In the absorption refrigeration apparatus installed and disposed in the casing, the bottom of the refrigerator main body is supported at a predetermined height by a stand, and a slide plate is attached to lower ends of legs of the stand, and a substrate of the casing is provided. It is characterized by being slidable on the top. Thereby, the casing can be removed and the refrigerator main body can be slid to the front, and maintenance can be facilitated. The substrate usually also serves as the bottom plate of the casing, but the substrate may be formed separately from the bottom plate of the casing.

According to a second aspect of the present invention, the stand comprises a frame-shaped seat having a notch, on which the refrigerator main body is mounted, and a plurality of legs having upper ends connected to the frame-shaped seat. ing. This makes it easy to attach and detach the refrigerator itself,
A robust stand can be formed with a simple structure.

According to the third aspect, the lower ends of the columns are connected by a sliding plate, so that the strength of the legs of the stand can be increased, and the area of the sliding plate can be increased to facilitate sliding. Claim 4
In each of the sliding plates, one end is engaged with an engaging portion provided on the substrate of the casing, and the other end is detachably fastened to the bottom plate by a fastener. This facilitates fixing and opening between the substrate of the casing and the stand.

[0009]

FIG. 1 shows an absorption refrigeration system (outdoor unit) 100 of the present invention. As shown in FIG.
0 to form an absorption air conditioner. In the absorption refrigeration apparatus 100, a refrigerator main body 300 and a cooling tower (cooling tower) 400 are juxtaposed in a flat box-shaped casing 500. The refrigerator main body 300 is shown in FIG.
As shown in FIG. 3, a low-temperature regenerator 2 is connected above the high-temperature regenerator 1, and a gas burner B as a heat source is arranged below the high-temperature regenerator 1. An absorber 3 and an evaporator 4 are provided on the outer periphery of the low-temperature regenerator 2, and a condenser 5 is provided above the evaporator 4.

A high-temperature regenerator 1 is heated by a gas burner B, and a heating tank 1 for boiling the low-concentration absorbing liquid therein.
1 and a medium-concentration absorption liquid separating cylinder 12 extending upward from the top of the heating tank 11 for separating refrigerant vapor and medium-concentration absorption liquid concentrated by evaporation of the refrigerant vapor. The medium-concentration absorbing liquid separation cylinder 12 has a cylindrical shape, and an airtight refrigerant recovery tank 10 having a vertical cylindrical shape with a spherical shell ceiling for recovering refrigerant vapor is eccentrically provided on the left side.

The low-temperature regenerator 2 is installed on the outer periphery of the refrigerant recovery tank 10 concentrically with the medium-concentration absorption liquid separating cylinder 12 and has a vertical cylindrical low-temperature regenerator case 20 having a disk ceiling. Having. In the low-temperature regenerator case 20, a refrigerant vapor outlet 21 is provided at the outer peripheral portion of the ceiling, and an outlet 22 of a medium-concentration absorbent flow path L1 connected to the bottom 121 of the medium-concentration absorbent separation tube 12 is provided at the center of the ceiling. Have been.

In the low-temperature regenerator case 20, the medium-concentration absorbing liquid is supplied from the bottom 121 through a medium-concentration absorbing liquid flow path L1 provided with the heat exchanger H by a pressure difference. The supplied medium concentration absorbing liquid re-boils using the outer wall of the refrigerant recovery tank 10 as a heat source, and is separated into refrigerant vapor and the high concentration absorbing liquid.
The upper part of the low-temperature regenerator case 20 has an umbrella-shaped separation plate 2
3 is attached to form a gas-liquid separation unit 24, which communicates with the inside of the condenser 5 via the refrigerant vapor outlet 21 and the opening 5A.

On the outer periphery of the low-temperature regenerator case 20, a vertical cylindrical airtight evaporation absorption case 30 is concentrically arranged. Above the evaporative absorption case 30, a vertical cylindrical airtight condenser case 5 having the same outer diameter is provided via a partition plate 50A.
0 is set. The lower ends of the refrigerant recovery tank 10, the low temperature regenerator case 20, and the evaporative absorption case 30 are integrally welded to the bottom plate 6 to form airtight containers.

In this embodiment, the bottom plate 6 is formed by pressing a stainless steel plate, and is provided with a high center bottom 62 and a low outer bottom 63 with an intermediate cylindrical portion 61 interposed therebetween.
The lower end of the low-temperature regenerator case 20 is fitted and welded to the upper end of the intermediate cylindrical portion 61. In the center bottom portion 62, an insertion hole 64 through which the middle-concentration absorbent separation tube 12 is inserted is formed at the center, an inner step 65 having concentricity is formed outside the insertion hole 64, and an outer step 65 is formed outside the inner step 65. An eccentric outer step 66 is provided on the left side.

The lower end of the inner step 65 is
The support cylinder 67 is fitted and welded, and the upper end of the support cylinder 67 is drawn to a small diameter. Medium concentration absorbent separation tube 12
Are arranged coaxially in the support cylinder 67 and
3 is fitted inside the upper end of the support cylinder 67 and the fitting surface is welded, and the lower end 14 is set below the bottom plate 6 through the insertion hole 64.

A plurality of claws 68 are provided on the inner peripheral edge of the insertion hole 64, and abut on the outer peripheral wall of the intermediate-concentration-absorbent-liquid separating cylinder 12 to maintain the axis. The lower end of the refrigerant recovery tank 10 is fitted and welded to the upper end of the outer step 66. The lower end of the evaporative absorption case 30 is welded to the outer edge of the upper surface of the outer peripheral bottom 63.

The heating tank 11 has a recess opening downward, and the recess forms a combustion chamber C of a burner B. The boiling port 1B provided at the top of the heating tank 11 has a short cylindrical portion, and is fitted to the lower end 14 of the medium-concentration absorbent separating cylinder 12, and the fitting surface is welded. The upper part of the combustion cylinder D of the burner B is inserted into the combustion chamber C.

The bottom of the heating tank 11 has a combustion cylinder D
An exhaust duct 15 of the burner B is provided, which is welded to the outer periphery of the heating tank 11 and the inner peripheral edge of the ring-shaped ceiling is engaged and welded to the outer peripheral edge of the top of the heating tank 11. Exhaust duct 1
The outer periphery of 5 and the outer periphery of the combustion cylinder D are surrounded by an air supply duct 16 of a burner B composed of a bottomed quadrangular cylinder-shaped lower part and a cylindrical upper part and forming a flow path for combustion air.

The cylindrical upper part of the burner air supply duct 16
The upper end is welded to the outer peripheral wall of the upper end of the exhaust duct 15, and a combustion air inlet 17 is formed on the side.
An outlet 19 of a blower 18 is connected to the combustion air inlet 17. The blower 18 includes a blower motor, a scroll casing having an inlet and the outlet 19, and a fan arranged in the scroll casing.

The refrigerator main body 300 is installed on the stand 7 and stands upright. The stand 7 will be
A seat 71 which is formed by bending a pipe into an annular shape having a zero, and which comes into contact with the outer edge of the lower surface of the outer peripheral bottom 63;
And a leg 72 consisting of four columns extending downward from the bottom. Each of the legs 72 is made of a pipe, and the left and right legs and the right and left legs are respectively sled-shaped sliding plates 73, 73 having a U-shaped cross section.
Are connected by welding or the like.

The width of the cutout portion 70 is set to be larger than the outer diameter of the high-concentration regenerator medium-concentration absorbent separation tube 12 projecting below the bottom plate 6 of the refrigerator main body 300. Thereby, as shown in FIG. 4, the handle 3 is attached to the ceiling 301 of the refrigerator main body 300.
02, 302 is fastened, the chain CH is hooked on the handles 302, 302, lifted by a chain block or the like, and attached to or detached from the stand 7 by simply lifting the refrigerator main body 300 slightly. As a result, in the mounting operation of the refrigerator main body 300 at the time of assembling and the attaching / detaching operation at the time of maintenance, the operation can be easily performed as compared with a case where the refrigerator main body 300 is largely lifted.

The four struts constituting the legs 72 are each bent at the top toward the center so as to secure a space for equipment to be installed below the bottom plate 6. Fastening holes 74 are formed at three places in the seat portion 71, screws 69 welded to the lower surface of the bottom plate 6 are inserted, and fastened with nuts 75.

In the absorber 3, a cooling coil 31 wound in a vertical cylindrical shape as an absorption heat exchanger is disposed in an inner portion inside the evaporative absorption case 30, and above the cooling coil 31, a high-concentration absorbing liquid is supplied to the cooling coil 31. And a high-concentration absorbing liquid spraying device 32 for spraying water. The absorber 3 is used during the cooling operation, and the cooling water for exhaust heat cooled by the cooling tower 400 is circulated in the cooling coil 31.

The bottom of the low-temperature regenerator 2 is a high-concentration absorbent receiving section 25, which is connected to a high-concentration absorbent sprayer 32 via a heat exchanger H by a high-concentration absorbent flow path L2. . The high-concentration absorbent is sprayed by the high-concentration absorbent by the cooling coil 3.
1 and adheres to the surface of the cooling coil 31 to form a film, which flows down by the action of gravity. The bottom 33 of the absorber 3 and the bottom of the heating tank 11 are connected by a heat exchanger H and a low-concentration absorbent flow path L3 equipped with an absorbent pump P1.

The evaporator 4 has a vertical cylindrical partition wall 4 with a communication port on the outer periphery of the cooling coil 31 in the evaporative absorption case 30.
0, and a vertical cylindrical evaporating coil 41 as an evaporative heat exchanger through which cold and hot water for cooling and heating flows is provided on the outer periphery of the partition wall 40. Above the evaporating coil 41, a refrigerant cooler 42 is installed, and below the refrigerant cooler 42, a refrigerant liquid spraying tool 43 is attached. The bottom part 4A of the evaporator 4 is connected to the bottom part 12 of the medium-concentration absorbent separating cylinder 12 by a heating absorbent flow path L4 having a heating solenoid valve V2.
Communicates with 1.

Both ends of the evaporating coil 41 are connected to a cold / hot water flow path 46.
And circulates cooling / heating water for cooling / heating to the indoor unit 200 by the cooling / heating water pump P3. In this embodiment, the lower end of the partition wall 40 is in contact with the upper surface of the outer peripheral bottom 63 of the bottom plate 6, and the upper part of the upper end is the evaporator 4.
It is a flow port that flows from the to the absorber 3.

The condenser 5 is provided inside a condenser case 50.
A cooling coil 51 in which cooling water for exhaust heat cooled by a cooling tower 400 is circulated is provided, and a coolant receiver 52 for receiving a coolant liquid condensed downward is attached to the cooling coil 51. Become. The condenser case 50 communicates with the bottom 10A of the refrigerant recovery tank 10 through the refrigerant flow path L5, and communicates with the low-temperature regenerator 2 through the refrigerant vapor outlet 21 and the gap 5A. Steam is supplied. The supplied refrigerant vapor is cooled and liquefied by the cooling coil 51 in a low pressure state.

The refrigerant liquid receiver 52 and the refrigerant cooler 42
It is connected by a constant refrigerant liquid flow path L6 in which the refrigerant liquid always flows during a steady operation. Also, the bottom 53 of the condenser 5
And the refrigerant cooler 42 are connected by a temporary refrigerant liquid flow path L7 for allowing the refrigerant liquid to flow down temporarily at the start of operation or the like. The cooling coil 31 is connected to a cooling coil 51, and further connected to a cooling tower 400 via a cooling water circulation path 34 equipped with a cooling water pump P2.

The refrigerant condensed and liquefied in the condenser 5 accumulates in a refrigerant liquid receiver 52 installed below the cooling coil 51,
The overflowed portion accumulates in the bottom 53 of the condenser 5.
The refrigerant liquid in the refrigerant liquid receiver 52 always flows from the refrigerant liquid flow path L6 to the refrigerant cooler 42 in the evaporator 4. The air pressure in the evaporator 4 is lower than that in the condenser 5 because the refrigerant vapor is absorbed in the absorber 3 communicating with the evaporator 4 above the partition wall 40.

For this reason, a part of the refrigerant liquid flowing down in the refrigerant cooler 42 boils, and the remaining refrigerant liquid is cooled by the heat of vaporization to maintain a liquid phase. The vaporized refrigerant is discharged into the evaporator 4, and the refrigerant liquid that has been cooled and maintains a liquid phase flows down to the refrigerant liquid spraying tool 43 and is sprayed downward.

The coolant sprayer 43 drops coolant on the evaporation coil 41 during the cooling operation. The dropped refrigerant wets the surface of the evaporating coil 41 with surface tension, becomes a film, and descends downward by the action of gravity, while taking the vaporization heat from the evaporating coil 41 in the evaporating absorption case 30 at a low pressure. The evaporating and cooling water for cooling and heating flowing in the evaporating coil 41 is cooled. The vaporized refrigerant flows into the absorber 3 mainly through the gap 4B between the upper end of the partition wall 40 and the lower surface of the refrigerant liquid dispersing tool 43.

During the cooling operation, cooling water for exhaust heat is circulated by the cooling water pump P2 in the order of cooling tower 400 → cooling coil 31 → cooling coil 51 → cooling tower 400. The absorbent circulates in the order of high-temperature regenerator 1 → low-temperature regenerator 2 → absorber 3 → absorbent pump P 1 → high-temperature regenerator 1.

As shown in FIG. 1, the casing 500 includes a substrate 8 also serving as a bottom plate, a right / left back plate 81, a left / left back plate 82, a front plate 83, and a top plate 84. The substrate 8 is made of a thick iron plate, and has clogs 85, 8 on the lower surface.
5 are provided. The lower end of the right side plate 81 and the left side plate 82 and the left side plate 82 is fastened to the substrate 8 with a number of screws. The front plate 83 and the top plate 84 are fastened to the base plate 8, the right / back plate 81, and the left / left back plate 82 with a small number of screws. The substrate 8 may be separate from the bottom plate of the casing 500.

On the right side of the upper surface of the substrate 8, engaging portions 86, 86 with which the rear ends of the sliding plates 73, 73 are engaged are provided at a rear portion, and fastening screw holes 87, 87 are provided at a front portion. It is open. The sliding plates 73, 73 are set on the upper surface of the substrate 8 and slid rearward so that the rear ends thereof are engaged with the engaging portions 86, 8.
6 and is fixed to the substrate 8 by fastening the fastening screws 88, 88. Note that a structure in which the rear ends of the sliding plates 73, 73 are also fastened with screws may be employed.

Thus, the fastening screws 88, 88 are removed,
The refrigerator main body 300 can be slid forward with the stand 7. This is because the absorption type refrigerating apparatus 100, which is an outdoor unit, is often installed behind a wall, so that it is extremely effective when performing maintenance of the refrigerating apparatus main body, and facilitates repairs and the like. In addition, it can be easily assembled at the time of manufacture.

In this embodiment, since a pair of left and right sliding plates 73, 73 are provided to slide forward and backward, other parts such as a pump are installed below the stand 7. Even if it does, the other parts do not hinder the back and forth sliding, and can be moved by sliding.

In this embodiment, the structure of the sliding plate 73 is such that an angle member having a U-shaped cross section is cut into a predetermined length and used to reduce the cost.
An angle member having an L-shaped cross section may be used. The seat 71 and the legs 72 of the stand 7 are both formed by bending a pipe material to reduce the weight and increase the structural strength, but this also uses an angle material or a sheet material formed by sheet metal. May be.

In this embodiment, the absorbing liquid pump P1 and the cold / hot water pump P3 are tandem pumps TP in which both pumps are driven by one double shaft motor M. The tandem pump TP is installed below the bottom plate 6 and beside the burner air supply duct 16 and is fastened to the substrate 8 of the casing 500 in the stand 7. With this configuration, it is easy to secure a place for installing the tandem pump TP, which is advantageous for making the absorption refrigeration apparatus compact. Also, the tandem pump TP can be easily attached and detached, which is convenient for maintenance.

In the above embodiment, the legs 72 are composed of four columns, and two legs are connected by the sliding plates 73, 73.
May be constituted by six columns, and three columns may be connected by a pair of sliding plates.

[Brief description of the drawings]

FIG. 1 is a perspective view of an absorption refrigeration apparatus.

FIG. 2 is a conceptual diagram of a cooling and heating device using an absorption refrigeration device.

FIG. 3 is a sectional view of a refrigerator main body.

FIG. 4 is an assembled perspective view of the absorption refrigeration apparatus.

FIG. 5 is a perspective view of the absorption refrigeration apparatus as viewed obliquely from the front.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High temperature regenerator 2 Low temperature regenerator 3 Absorber 4 Evaporator 5 Condenser 6 Bottom plate 69 Screw (fastener) 7 Stand 71 Seat part 72 Leg 73 Sliding plate 75 Nut (fastener) 8 Substrate 100 Absorption refrigeration system ( Outdoor unit) 200 Indoor unit 300 Refrigerator body 400 Cooling tower 500 Casing B Burner

Claims (4)

(57) [Claims] 1. High temperature regenerator, low temperature regenerator, condensation of refrigerant
A refrigerator main body provided with a vessel, an evaporator, and an absorber, is disposed on a substrate provided in a casing, and is disposed in the casing. The refrigerator main body is placed on a stand, An absorption refrigerating apparatus, wherein a slide plate is attached to a lower end of a leg of a stand so that the refrigerator body can slide on the substrate together with the stand. 2. High temperature regenerator, low temperature regenerator, condensation of refrigerant
A refrigerator main body provided with a vessel, an evaporator and an absorber is mounted on a substrate provided in a casing and disposed in the casing while the refrigerator main body is placed on a stand. The stand has a cutout portion, and is formed by a frame-shaped seat portion on which the refrigerator main body is mounted, and a plurality of legs having an upper end connected to the frame-shaped seat portion. Type refrigeration equipment. 3. The method according to claim 1, wherein the leg is
An absorption refrigerating apparatus comprising four or more columns and a sliding plate connecting lower ends of half columns. 4. The sliding plate according to claim 1, wherein one end of the sliding plate is engaged with an engaging portion provided on a substrate of the casing, and the other end is detachably fastened to the substrate by a fastener. An absorption refrigeration apparatus characterized by the above-mentioned.