JPH09269161A - Absorbing type freezer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbing type freezer in which its size can be reduced, a burner, a high temperature regenerator and a low temperature regenerator are arranged vertically to attain a compact structure, a metallic fatigue caused by thermal stress is reduced and its durability is increased. SOLUTION: A bottom plate 6 of a case 20 of low temperature regenerator at a main body A of a freezer is supported by a stand at a predetermined height and then below the bottom plate 6 is arranged a tandem type pump TP in which a heating tank 11 connected to a lower end of an intermediate concentration absorbing liquid separating cylinder 12, a burner B, a forced air supplying blower 18, an absorbing liquid pump and a cold or hot water pump are integrally assembled. In addition, the bottom plate 6 has a through- pass hole 64 through which the intermediate concentration absorbing liquid separating cylinder 12 is inserted and passed, a hanging and supporting cylinder 7 is vertically installed at the bottom plate, the intermediate concentration absorbing liquid separating cylinder 12 is hung and then the heating tank 11 is connected to the lower end of the separating cylinder and the burner B is fixed to the lower part of the heating tank 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption type refrigerating apparatus which uses an aqueous solution such as lithium bromide as an absorption liquid.

[0002]

2. Description of the Related Art An absorption refrigerating apparatus includes a heating source, a heating tank for heating and boiling a low-concentration absorbing solution with the heating source, an absorption liquid separating cylinder extending upward from the top of the heating tank, and the absorption liquid. A regenerator consisting of a refrigerant recovery tank disposed on the outer periphery of the separation cylinder for recovering the refrigerant vapor, a refrigerant condenser, and an evaporator and an absorber having an evaporation / absorption case disposed on the outer periphery of the regenerator are integrated. It has a frozen refrigerator body.

The refrigerator body has a cooling tower (cooling tower) for circulating cooling water in the condenser and the absorber.
Are arranged in parallel to form an absorption type refrigeration system. The absorption refrigeration system is housed in a casing, for example, and constitutes an outdoor unit of the absorption air conditioner. Cold / hot water as a heat medium is supplied to the inside of the evaporator and is connected to an indoor unit of the absorption air conditioner.

[0004]

Although a large model is practically used for this absorption refrigeration system, it is desired to reduce the size of the absorption refrigeration system and apply it to a home air-conditioning system from the viewpoint of diversification of energy sources. There is. An object of the present invention is to provide an absorption refrigerating apparatus in which metal fatigue due to thermal stress of a regenerator that is heated to cause a difference in thermal expansion is reduced and durability is increased.

[0005]

According to a first aspect of the present invention, in the absorption refrigerating apparatus, the bottom plate of the refrigerator main body is supported by a stand at a predetermined height, and is projected and hung below the bottom plate. A heating tank and a burner are arranged at the lower end of the absorption liquid separation cylinder. With this configuration, the body can be made compact, and the convection of the absorbing liquid, which is the working fluid, can be smoothly performed, so that the thermal efficiency can be improved.

Further, even if there is a difference in thermal expansion between the burner, the heating tank, and the absorption liquid separation cylinder, which are the high temperature parts of the refrigerator main body, the other parts of the refrigerator main body such as the absorber and the evaporator are free because the lower part is free. It is possible to prevent the difference in thermal expansion from acting on.
Therefore, the horizontal state of each part of the refrigerator main body can be maintained,
Freezing capacity is stable. Further, since the high temperature portion can be freely displaced downward, it is possible to prevent metal fatigue due to repeated thermal stress acting on the high temperature portion due to the difference in thermal expansion as in the case where the high temperature portion cannot be displaced downward. As a result, durability can be improved.

According to a second aspect of the present invention, the bottom plate of the refrigerator body is integrally formed with the refrigerant recovery tank of the regenerator and the bottom plates of the evaporator and the absorber, and the stand is the bottom plate of the evaporator and the absorber. Support the part of. This allows
The stability can be increased. In the invention described in claim 3, the burner has a blower for forced air supply, and the blower is arranged below the bottom plate.

In the invention as set forth in claim 4, the refrigerator main body is connected to an absorption liquid pump which absorbs the refrigerant vapor and returns the low concentration absorption liquid to the regenerator, and a cold / hot water pump for circulating cold / hot water. In addition, the absorption liquid pump and the cold / hot water pump were arranged below the bottom plate. As a result, the space below the bottom plate formed by the stand can be effectively used, and compactness and convenience of maintenance can be obtained.

In a fifth aspect of the present invention, the refrigerator main body has an insertion hole through which a medium-concentration absorbent separation column is inserted, and a bottom plate that closes at least the bottom of the refrigerant recovery tank. A suspension supporting cylinder that supports the refrigerator main body at a predetermined height with a stand that supports the seat and a leg that holds the seat at a predetermined height, and joins the lower end to the bottom plate to surround the insertion hole. A medium-concentration absorbent separation separated from the bottom plate by vertically arranging the suspension supporting cylinder and the upper part of the middle-concentration absorbent separating cylinder inserted through the inside of the supporting cylinder. A heating tank is connected to a lower end of the cylinder, and a burner is attached to a lower portion of the heating tank. With this configuration, the physique can be made compact, and the same action and effect as the configuration of the first aspect can be obtained.

In the structure of claim 6, the bottom plate is
The refrigerant recovery tank and the bottom plate of the evaporation / absorption case are integrally molded, and the seat portion of the stand is a frame that supports the lower surface outer peripheral portion of the bottom plate of the evaporation / absorption case. Thereby, the support surface of the refrigerator main body by the stand can be enlarged, and the refrigerator main body is stabilized. In the configuration according to claim 7, a plurality of bolts are capacity discharge stud welded to the lower surface of the bottom plate, a fastening hole into which the bolt is inserted is formed in the seat portion of the stand, and the bolt is inserted into the fastening hole. A nut is screwed onto the bolt for fastening. As a result, corrosion of the bolt welds on the inner surface of the bottom plate due to the absorbing liquid can be prevented, and the durability of the refrigerator main body can be improved.

[0011]

1 shows a cross section of a refrigerator main body A and a stand for supporting the refrigerator main body A, and FIG. 2 shows a schematic structure of an absorption type air conditioner. The absorption air conditioner is shown in Figure 2.
As shown in FIG. 3, the absorption type refrigerating apparatus (outdoor unit) 100 and the indoor unit 200 are included. As shown in FIG. 4, the outdoor unit 100
Is a refrigerator main body A and a cooling tower (cooling tower) C
Ts are arranged side by side in a flat box-shaped casing K (see FIG. 3).

In the refrigerator main body A, a low temperature regenerator 2 is connected above the high temperature regenerator 1 to generate a high concentration absorbent and a refrigerant. Below the high temperature regenerator 1, a burner B as a heat source is arranged. An absorber 3 is provided around the low temperature regenerator 2.
An evaporator 4 is provided, and a condenser 5 is installed above the evaporator 4.

The high temperature regenerator 1 is heated by a burner B to boil the low-concentration absorbing liquid inside the heating tank 11.
And extends upward from the top 1A of the heating tank 11,
It has a medium-concentration absorbent separation column 12 for separating the refrigerant vapor and the medium-concentration absorbent that has been concentrated by evaporation of the refrigerant vapor. The medium-concentration absorption 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 the refrigerant vapor is eccentrically provided on the left side on the outer periphery thereof. .

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

The inside of the low temperature regenerator case 20 is supplied with the medium concentration absorption liquid from the bottom 121 through the medium concentration absorption liquid flow path L1 provided with the heat exchanger H due to the pressure difference. The supplied medium-concentration absorption liquid reboils using the outer wall of the refrigerant recovery tank 10 as a heat source, and is separated into a refrigerant vapor and a high-concentration absorption liquid.
The upper part of the low temperature regenerator case 20 has an umbrella-shaped separation plate 2 on the ceiling.
3 is attached to form a gas-liquid separation section 24, which communicates with the inside of the condenser 5 through 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. A partition plate 50 is provided above the evaporation / absorption case 30.
A vertically cylindrical, airtight condenser case 50 having the same outer diameter is installed via A. The lower ends of the refrigerant recovery tank 10, the low temperature regenerator case 20, and the evaporation / absorption case 30 are integrally welded to the bottom plate 6 to form an airtight container.

The bottom plate 6 is formed by pressing a thick stainless plate, and is provided with a high central bottom portion 62 and a low outer peripheral bottom portion 63 with the intermediate tubular 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 tubular portion 61. The central bottom portion 62 is formed with an insertion hole 64 at the center through which the medium-concentrated absorbent separation cylinder 12 is inserted.
An inner stepped portion 65 having a concentricity is formed on the outer side of the inner side of the inner side of the inner side of the inner side, and an outer stepped portion 66 eccentric to the left side is provided outside the inner side stepped portion 65.

A lower end 71 is fitted to the inner stepped portion 65 and welded to the inner stepped portion 65, and a hanging support cylinder 7 having an upper end 72 drawn to a small diameter is erected. The medium-concentration absorbent separating cylinder 12 is coaxially arranged in the support cylinder 7, the upper end 13 is internally fitted to the upper end 72 of the support cylinder 7 and the fitting surface is welded, and the lower end 14 has the insertion hole 64. Insert the bottom plate 6
It is set lower and suspended. A heating tank 11 and a burner B are attached below the medium-concentration absorbent separation column 12, and the bottom of the burner B at the lowermost end floats above the ground to form a free end.

A plurality of claws 67 are provided on the inner peripheral edge of the insertion hole 64, and contact the outer peripheral wall of the medium-concentrated absorbent separation cylinder 12 to hold the shaft center. The lower end of the refrigerant recovery tank 10 is fitted and welded to the upper end of the outer step portion 66. The lower end of the evaporation / absorption case 30 is welded to the outer edge of the upper surface of the outer peripheral bottom portion 63.

The heating tank 11 has a recess opening downward, and the recess serves as the combustion chamber C of the burner B. The boiling port 1B provided at the top of the heating tank 11 has a short tubular portion, and is fitted to the lower end 14 of the medium-concentrated absorbent separation column 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.

On the outer periphery of the heating tank 11, the bottom is a combustion cylinder D.
An exhaust duct 15 of the burner B is provided, which is welded to the outer periphery of the burner B and whose inner peripheral edge of the annular plate-shaped ceiling is engaged and welded to the outer peripheral edge of the top portion 1A of the heating tank 11. The outer circumference of the exhaust duct 15 and the outer circumference of the combustion cylinder D are surrounded by an air supply duct 16 of the burner B which is composed of a bottomed quadrangular cylindrical lower part and a cylindrical upper part and forms a flow path of combustion air. .

The upper end of the cylindrical upper portion of the air supply duct 16 is welded to the outer peripheral wall of the upper end portion of the exhaust duct 15, and
A combustion air inlet 17 is formed on the side portion. 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 a suction port and a blowout port 19, and a fan arranged in the scroll casing.

The refrigerator main body A is installed on a stand 8 and stands vertically. The stand 8 is formed by bending a pipe into an annular shape with a rear portion missing, and has a seat portion 81 that comes into contact with the outer edge portion of the lower surface of the outer peripheral bottom portion 63, and four legs 82 that extend downward from the seat portion 81. Have and. Each leg 82 is made of a pipe, and the front left and right legs and the front right and rear legs are connected by welding sled-shaped connecting plates 83, 83 having a U-shaped cross section. The upper portions of the four legs 82 are bent toward the center side, respectively, to secure a space for equipment to be installed below the bottom plate 6.

In this embodiment, the absorption liquid pump P1 and the cold / hot water pump P2 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 air supply duct 16 and is fastened to the bottom plate of the casing K in the stand 8. With this configuration, it becomes easy to secure a place for installing the tandem pump TP, which is advantageous for downsizing the absorption refrigeration system 100. Further, the tandem pump TP can be easily attached and detached, which is convenient for maintenance.

In the absorber 3, a cooling coil 31 wound in a vertical cylindrical shape as an absorption heat exchanger is arranged in an inner portion of the evaporation / absorption case 30, and a high-concentration absorption is performed above the cooling coil 31. High-concentration absorbent sprayer 32 for spraying liquid
Wear it. The absorber 3 is used during cooling operation,
Cooling water for exhaust heat cooled in the cooling tower CT circulates in the cooling coil 31.

The bottom of the low-temperature regenerator 2 is a high-concentration absorbent receiving part 25, which is connected to the high-concentration absorbent sprayer 32 by a high-concentration absorbent flow path L2 via a heat exchanger H. . In the high-concentration absorbent sprayer 32, the high-concentration absorbent flows in due to the pressure difference, and the inflowing high-concentration absorbent is cooled by the cooling coil 3.
1 is sprayed on the upper end of the cooling coil 31, adheres to the surface of the cooling coil 31 to form a film, and flows downward by the action of gravity. The bottom portion 33 of the absorber 3 and the bottom portion 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 is provided with a vertical cylindrical partition wall 40 having a communication port on the outer periphery of the cooling coil 31 in the evaporation / absorption case 30, and the interior of the partition wall 40 is cooled and heated for cooling and heating. It has a configuration in which a vertical cylindrical evaporation coil 41 is arranged as an evaporation heat exchanger through which water flows. A refrigerant cooler 42 is installed above the evaporation coil 41, and the refrigerant cooler 42
A refrigerant liquid spraying tool 43 is attached below the. The bottom portion 4A of the evaporator 4 is provided at the bottom portion 1 of the medium-concentration absorption liquid separation cylinder 12 by the heating absorption liquid passage L4 having the heating electromagnetic valve V2.
It communicates with 21.

Both ends of the evaporation coil 41 are provided with a cold / hot water flow path 46.
Is connected to the indoor unit 200, and cold / hot water for cooling / heating is circulated in the indoor unit 200 by the cold / hot water pump P2. In this embodiment, the lower end of the partition wall 40 abuts on the upper surface of the outer peripheral bottom portion 63 of the bottom plate 6, and the upper part of the upper end of the partition wall 40 has the evaporated refrigerant.
It is a flow port 4B that flows from the absorber to the absorber 3.

The condenser 5 is provided inside the condenser case 50.
A cooling coil 51 in which exhaust heat cooling water cooled by a cooling tower CT circulates is arranged, and a cooling liquid receiver 52 for receiving condensed cooling liquid is attached to the cooling coil 51 downward. Become. The condenser case 50 communicates with the bottom portion 10A of the refrigerant recovery tank 10 through the refrigerant flow path L5, and also communicates with the low temperature regenerator 2 through the refrigerant vapor outlet 21 and the opening 5A. Supplied. The supplied refrigerant is cooled by the cooling coil 51 and liquefied.

The refrigerant liquid receiver 52 and the refrigerant cooler 42 are
Constant refrigerant flow path L in which the refrigerant liquid always flows down during steady operation
Connected by 6. In addition, the bottom 5B of the condenser 5
And the refrigerant cooler 42 are connected by a temporary refrigerant flow path L7 for temporarily flowing down the refrigerant liquid at the time of starting operation. A refrigerant solenoid valve V4 is provided in the temporary refrigerant passage L7 and is opened / closed by the output of the control device 300. The cooling coil 31 is connected to the cooling coil 51, and further connected to the cooling tower CT by a cooling water circulation path 34 equipped with a cooling water pump P3.

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

Therefore, in the refrigerant cooler 42, a part of the refrigerant liquid flowing down is boiled, and the heat of vaporization cools the remaining refrigerant liquid to maintain the liquid phase. The vaporized refrigerant is discharged into the evaporator 4, and the refrigerant liquid that is cooled and maintains the liquid phase flows down to the refrigerant liquid spraying tool 43 and is sprayed downward.

The refrigerant liquid sprinkler 43 drips the refrigerant liquid onto the evaporation coil 41 during the cooling operation. The dripped refrigerant wets the surface of the evaporation coil 41 due to surface tension, becomes a film, and drops downward due to the action of gravity, while depriving the evaporation coil 41 of heat of vaporization in the evaporation / absorption case 30 at a low pressure. To evaporate and cool the hot and cold water for cooling and heating flowing in the evaporation coil 41. The vaporized refrigerant mainly flows through the gap between the upper end of the partition wall 40 and the lower surface of the refrigerant liquid spraying tool 43 to the absorber 3.

During the cooling operation, the cooling water pump P3 circulates the waste heat cooling water in the order of cooling tower CT → cooling coil 31 → cooling coil 51 → cooling tower CT. The absorption liquid is
The high temperature regenerator 1 → low temperature regenerator 2 → absorber 3 → absorption liquid pump P1 → high temperature regenerator 1 circulates in this order.

The evaporation coil 41 and the cooling coil 31 are
Although the refrigerant liquid and the high-concentration absorbent are sprayed from above, respectively, the refrigerant liquid sprayer 43 and the high-concentration absorbent sprayer 32 are leveled in order to ensure uniform spraying and proper refrigerating capacity. Must be set to.

In the present invention, the burner B, which has a high temperature, the heating tank 11, and the medium-concentration absorbent separating column 12 are suspended from the bottom plate 6, and the bottom plate 6 is supported by the stand 8. Therefore, the influence of the dimensional change due to the thermal expansion of the high temperature portion can be prevented from being distorted in the evaporator 4 and the absorber 3, and the refrigerant liquid spraying tool 43 and the high-concentration absorbent spraying tool 32 can be horizontally moved. Maintained. In addition, the high temperature portion,
Since it can be freely displaced downward, it is possible to prevent metal fatigue due to repeated thermal stress acting on a high temperature portion due to the difference in thermal expansion as in the case where displacement cannot be performed downward.
As a result, durability can be improved.

Further, since the space below the bottom plate 6 is used as a space for disposing the tandem pump TP, the burner B, the heating tank 11 and the like, the refrigerating apparatus can be made compact and the center of gravity can be reduced to stabilize it. It is possible to improve the sex. Further, by disposing the medium-concentration absorbent separation column 12 above the burner B and the heating tank 11, the convection of the working fluid is made smooth. As a result, the thermal efficiency can be improved.

FIG. 6A shows a fixing mechanism for the bottom plate 6 and the seat portion 81 of the stand 8. As shown in FIG. 5, three bolts 84 are welded to the lower surface of the bottom plate 6 at substantially equal intervals by capacitive discharge stud welding. Three fastening holes 85 are formed in the seat 81 in the vertical direction corresponding to the positions of the bolts 84. The bolt 84 is made of stainless steel having a screw formed only in the lower portion, and the upper end surface is brought into contact with a predetermined position of the lower surface 6A of the stainless steel bottom plate 6 to perform capacity discharge stud welding.

By carrying out the capacity discharge type stud welding of the bolt 84, the heat change of the metal structure of the bottom plate 6 due to the high heat which occurs when a joining method such as ordinary welding or brazing is used. Corrosion resistance is lowered, and it is possible to prevent corrosion due to the absorbing liquid. Further, it is possible to prevent the metal structure of the bottom plate 6 from being damaged such as fine cracks.
This causes corrosion and metal fatigue due to long-term operation,
This effectively eliminates the problem of hydraulic fluid leaking from the welded portion, improving the durability of the absorption refrigeration system.

To install the refrigerator main body A on the stand 8, as shown in FIG. 5, the refrigerator main body A is hoisted by the chain block E, placed above the stand 8 and lowered.
The three bolts 84 are inserted into the individual fastening holes 85. Next, the nut 86 is screwed. The number of bolts 84 may be two or four or more, but it is preferable that the number of bolts is three from the viewpoint of easy assembly work of the fixing mechanism and stable fixing of the refrigerator main body A. The bottom plate 6 is attached to the stand 8 by screwing it with the bolts 84 and the nuts 86, and then the refrigerant recovery tank 10 and the low temperature regenerator case 2 are attached.
0, the evaporation / absorption case 30, and the condenser case 50 may be stacked and assembled.

FIG. 6B shows another embodiment of the bolt 84. In this embodiment, the head 87 has a collar shape of 1.2 to
The diameter is increased by 2.0 times and the welding surface with the lower surface 6A of the bottom plate 6 is increased. Thereby, the welding strength by the capacity discharge stud welding can be increased, and the fixing between the refrigerator main body A and the stand 8 is strengthened.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a refrigerator main body.

FIG. 2 is a conceptual diagram of an air conditioner using an absorption refrigeration system.

FIG. 3 is a perspective view of the refrigerating machine main body from obliquely rearward.

FIG. 4 is a perspective view of the absorption type refrigeration apparatus from diagonally front.

FIG. 5 is an assembled perspective view of the absorption refrigeration system.

FIG. 6 is an enlarged view of a fixed portion between a bottom plate and a stand.

[Explanation of symbols]

 1 High-temperature regenerator 2 Low-temperature regenerator 3 Absorber 4 Evaporator 5 Condenser 6 Bottom plate 7 Suspending support cylinder 8 Stand 10 Refrigerant recovery tank 11 Heating tank 12 Medium concentration absorption liquid separation cylinder 18 Blower 20 Low-temperature regenerator case 30 Evaporation / Absorption case 31 Cooling coil 40 Partition wall 41 Evaporation coil 64 Insertion hole 81 Seat part 82 Leg 84 Bolt 85 Fastening hole 100 Absorption type refrigerator (outdoor unit) 200 Indoor unit 300 Controller A Refrigerator body B Burner H Heat exchanger K Casing P1 Absorbent pump P2 Cold / hot water pump TP Tandem pump

Claims (7)

[Claims] 1. A heat source, a heating tank heated by the heating source, an absorption liquid separation cylinder arranged above the heating tank and a refrigerant recovery tank surrounding the absorption liquid separation cylinder, and evaporating a refrigerant. A regenerator that obtains a refrigerant and a high-concentration absorption liquid, a condenser that liquefies the refrigerant separated by the regenerator, and a cooler water that is arranged on the outer periphery of the regenerator and that evaporates the refrigerant liquid supplied from the condenser. In an absorption refrigerating apparatus having a refrigerator main body having an evaporator for cooling the refrigerant and an absorber for absorbing the refrigerant vapor in the high-concentration absorption liquid, a bottom plate of the refrigerator main body is supported at a predetermined height by a stand. Then
An absorption type refrigerating apparatus, wherein the heating tank and a burner are arranged at a lower end of the absorption liquid separating cylinder which is projected and suspended below the bottom plate. 2. The bottom plate of the refrigerator main body according to claim 1, wherein the refrigerant recovery tank of the regenerator, the bottom plate of the evaporator, and the bottom plate of the absorber are integrally molded, and the stand is the evaporator and the bottom plate. An absorption type refrigeration system characterized by supporting a bottom plate portion of an absorber. 3. The absorption type refrigerating apparatus according to claim 1, wherein the burner has a blower for forced air supply, and the blower is arranged below the bottom plate. 4. The refrigerator body according to claim 1,
While being connected to an absorption liquid pump that absorbs a refrigerant vapor and reduces the concentration of the absorption liquid to the regenerator, and a cold / hot water pump that circulates cold / hot water, the absorption liquid pump and the cold / hot water pump are connected to the bottom plate. An absorption type refrigerating device, which is arranged below. 5. A burner, a heating tank heated by the burner, a medium-concentration absorbent separation column extending upward from the heating tank, and a refrigerant recovery tank surrounding the middle-concentration absorbent separation column. A high-temperature regenerator that heats the low-concentration absorption liquid in the heating tank to separate it into a refrigerant vapor and a medium-concentration absorption liquid, and a low-temperature regenerator case arranged on the outer periphery of the refrigerant recovery tank, and has evaporated A low-temperature regenerator that obtains a refrigerant and a high-concentration absorbent by evaporating the refrigerant by reheating the medium-concentration absorbent using the heat of condensation of the refrigerant, and the refrigerant separated by the high-temperature regenerator and the low-temperature regenerator. It has a condenser for liquefying and an evaporation / absorption case arranged on the outer periphery of the low temperature regenerator case, and the refrigerant liquid supplied from the condenser is applied to an evaporation heat exchanger through which cold / hot water as a heat medium flows. Spray and evaporate to cool the hot and cold water And an absorber that sprays the high-concentration absorbent onto the absorption heat exchanger through which the cooling water for exhaust heat flows, and absorbs the refrigerant vapor generated in the evaporator into the high-concentration absorbent. In the absorption type refrigerating apparatus, which comprises a refrigerating machine main body, and an absorbing liquid pump that absorbs refrigerant vapor and reduces the concentration of the absorbing liquid to return to the regenerator, the refrigerating machine main body has the middle-concentration absorbing liquid in the central portion. The stand has a bottom plate that has an insertion hole through which the separation cylinder is inserted and that closes at least the lower part of the refrigerant recovery tank, and a stand that includes a seat portion that supports the bottom plate and legs that hold the seat portion at a predetermined height. The main body of the machine is supported at a predetermined height, a lower end is joined to the bottom plate, and a suspending support cylinder surrounding the insertion hole is erected, and the suspension support cylinder is inserted through the upper part and the inside of the support cylinder. Join the upper part of the medium-concentration absorbent separation column Suspension, the bottom plate than to connect the heating tank to the lower end of the concentration absorption liquid separating cylinder in which is located below, the absorption refrigerating apparatus, characterized in that fitted with the burner in the lower portion of the heating tank. 6. The bottom plate of claim 5, wherein the bottom plate of the refrigerant recovery tank and the bottom plate of the evaporation / absorption case are integrally formed on the bottom plate, and the seat portion of the stand supports a lower peripheral portion of the bottom plate of the evaporation / absorption case. An absorption type refrigerating apparatus, which is a frame body. 7. The method according to claim 1, wherein a plurality of bolts are capacity discharge stud welded to a lower surface of the bottom plate, and a fastening hole into which the bolts are inserted is formed in a seat portion of the stand. An absorption type refrigerating apparatus, wherein the bottom plate and the seat portion are fastened by inserting the bolt into the fastening hole and screwing a nut onto the bolt.