JPH09303902A - Absorption freezer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a heating rate per smoke cylinder for guiding combustion heat of a burner within a cylindrical wall of a generating device and make a small-sized and lightweight generating device. SOLUTION: Each of many smoke cylinders 20 for guiding combustion heat generated at a gas burner into a cylindrical wall 14 of a generating device 2 is provided with many irregular surfaces 21 at each of substantial upper half sections, thereby a surface area of it is increased without causing a diameter of each of the smoke cylinders 20 to be increased and at the same time a disturbed flow is generated in a flow of combustion heat flowing in the smoke cylinder 20 and then a heating rate per one smoke cylinder 20 is increased. As a result, the number of smoke cylinders 20 is decreased to cause a size of the generating device 2 to be decreased or a heating calorie improving means arranged around the cylindrical wall 14 is simplified (the corrugated fins in many stages in the prior art are simplified into a plurality of buffle plates 24) to enable the generating device 2 to be light in weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigeration system using an aqueous solution of ammonia, lithium bromide or the like as a working fluid.

[0002]

2. Description of the Related Art An absorption refrigerating apparatus using an aqueous solution (working fluid) of ammonia, lithium bromide or the like heats the aqueous solution with a generator to generate a vapor of a refrigerant such as ammonia, and the vapor of the refrigerant is condensed into a condenser. It is liquefied by and is poured into a low-pressure evaporator through an expansion valve to perform a refrigerating action. In the absorber, the refrigerant evaporated again by the evaporator supplies the working fluid diluted by the evaporation of the refrigerant as an absorbing liquid from the generator and absorbs the refrigerant in the absorber. The working fluid having a high concentration due to the absorption of the refrigerant (ammonia gas) is circulated to the generator again by the pump.

It is desired to reduce the size and weight of this absorption refrigeration system and apply it to a home air conditioner / water heater.
Use a burner as a heating source for the generator. Here, the structure of the conventional generator is shown in FIG. 9 and FIG. The conventional generator 100 includes a cylindrical wall 101 having a cylindrical container shape, and heating for heating the internal working fluid with combustion gas generated at a lower burner B provided at one end of the cylindrical wall 101. A plate 102 is provided.

The generator 100 guides the combustion gas generated by the burner from the heating plate 102 into the cylindrical wall 101,
A plurality of smoke tubes 104 for heating the working fluid inside are provided. Since the plurality of smoke tubes 104 are exposed to the combustion gas generated by the burner and the high-pressure hydraulic fluid, they are formed of a straight pipe made of a hard material such as stainless steel having a predetermined thickness or more excellent in pressure resistance and corrosion resistance, and For the purpose of downsizing and high efficiency of the generator 100, the smoke cylinder 104 is also provided with a small diameter.

[0005]

In order to increase the heating area of the working fluid by the smoke tubes 104, the number of smoke tubes 104 arranged in the cylindrical wall 101 is increased, or the combustion gas passing through the smoke tubes 104 is transferred to the cylindrical wall. While guiding around 101,
A large number of copper corrugated fins 105 are provided on the outer periphery of the cylindrical wall 101 to improve the heating efficiency of the hydraulic fluid. However, when the number of smoke tubes 104 is increased, the weight of the generator 100 is increased and the cylindrical wall 101 is increased. However, there is a problem that the generator 100 becomes large due to the large diameter, or the weight of the generator 100 becomes heavy when a large number of corrugated fins 105 are provided.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide an absorption type refrigerating apparatus in which the heating rate of the working fluid per smoke cylinder is increased and the generator is made smaller and lighter.

[0007]

The absorption refrigeration system of the present invention employs the following technical means in order to achieve the above object. [Means of Claim 1] An absorption refrigeration system includes a generator for heating a working fluid, which is a mixture of a refrigerant and an absorbing fluid, with a burner to generate a mixed working fluid vapor of the refrigerant and the absorbing fluid; and the mixed working fluid vapor. A rectifier for rectifying and condensing the refrigerant component, and a condenser for condensing the gas refrigerant component of the concentrated mixed working liquid vapor,
An evaporator for evaporating the liquid refrigerant condensed by the condenser, and an absorber for absorbing the refrigerant vapor evaporated by the evaporator into the diluted working liquid are provided.

The generator is provided with a cylindrical wall having a substantially cylindrical container shape, and one end of the cylindrical wall is
A heating plate heated by the combustion gas generated by the burner is provided. Furthermore, a plurality of smoke tubes that guide the combustion gas generated by the burner into the tubular wall from the heating plate are provided in the cylindrical wall, and a large number of irregularities are provided around the plurality of smoke tubes. To be

[Means for Claim 2] The absorption refrigeration system includes a generator that heats a working fluid, which is a mixture of a refrigerant and an absorbing liquid, with a burner to generate a mixed working fluid vapor of the refrigerant and the absorbing liquid; A rectifier for rectifying the working fluid vapor to concentrate the refrigerant component,
A condenser for condensing the gas refrigerant component of the concentrated mixed working liquid vapor, an evaporator for evaporating the liquid refrigerant condensed by the condenser, and a refrigerant working liquid vapor evaporated by the evaporator is absorbed in a dilute working liquid. And an absorber.

The generator is provided with a cylindrical wall having a substantially cylindrical container shape, and one end of the cylindrical wall is
A heating plate heated by the combustion gas generated by the burner is provided. Further, the tubular wall is provided with a plurality of smoke tubes that guide the combustion gas generated by the burner from the heating plate into the tubular wall. Is provided, and the lower half part thereof is a straight pipe-shaped unprocessed portion.

[Means for Claim 3] In the absorption type refrigerating apparatus according to claim 1 or 2, the smoke tube has a jig ball arranged around a straight pipe, and the jig ball presses the straight pipe. However, the large number of irregularities are formed by rotating the straight pipe or the jig ball around the straight pipe.

[Means of Claim 4] In the absorption refrigerating device of Claim 3, the straight tube of the smoke tube is inserted into the straight tube with a central jig smaller than the inner diameter of the straight tube being inserted. By arranging the jig balls around, and rotating the straight pipe or the jig balls around the straight pipe while the jig balls press the straight pipe, the large number of irregularities are formed. It is characterized by being formed.

[0013]

The function of the absorption refrigeration system is as follows:
By providing many irregularities around the smoke pipe that guides the combustion gas into the cylindrical wall, the surface area of the smoke pipe increases and turbulence occurs in the flow of the combustion gas flowing in the smoke pipe, which causes the working fluid of the smoke pipe to flow. The heating efficiency is improved. As a result, the number of smoke tubes arranged in the tubular wall is reduced compared to the conventional one,
The weight of the generator can be reduced, and the diameter of the cylindrical wall can be reduced to reduce the size of the generator. Alternatively, the refrigerating capacity of the absorption refrigerating apparatus is improved by increasing the heating rate of the working fluid by the smoke cylinder. Further, it becomes possible to simplify or abolish the heating amount improving means (copper corrugated fins or the like) conventionally provided around the cylindrical wall, and it is possible to reduce the weight of the generator.

Further, the substantially upper half of the smoke tube is used as a bellows processing section,
By making the lower half part an unprocessed part, heat exchange between the combustion gas in the smoke tube and the working liquid around the smoke tube can be made uniform in the entire smoke tube. That is, if the lower half part is also the bellows processing part, the high temperature combustion gas just generated in the burner causes the heating area of the bellows processing part to increase and the turbulent flow to overheat the working fluid to cause bumping. As a result, the durability of the smoke stack deteriorates, such as damage to the smoke stack, but this problem can be avoided by making the lower half part an unprocessed part.

[0015]

1 to 8 show an embodiment to which the present invention is applied. In FIGS. 7 and 8, an aqueous ammonia solution is used as a working fluid (ammonia is a refrigerant and water is an absorbing fluid). 1 shows a cooling / heating water heater using the absorption refrigeration system 1.
Note that FIG. 7 shows a cooling operation operation, and FIG. 8 shows a heating operation operation.

The absorption refrigerating apparatus 1 of the present invention includes a generator 2 for generating ammonia gas, a heat source side heat exchanger 3 which functions as a condenser during cooling operation and an evaporator during heating operation, and an evaporator during cooling operation. Use side heat exchanger 4, which functions as a condenser and a condenser during heating operation,
And an absorber 5. Further, an inter-refrigerant heat exchanger 6 for exchanging heat between the liquid refrigerant and the gas refrigerant is arranged between the heat source side heat exchanger 3 and the use side heat exchanger 4. further,
Above the generator 2, a rectifier 7 and a condenser 8 for condensing are sequentially stacked.

These devices are connected by a working liquid flow passage, and a flow is made in a working liquid flow passage connecting the demultiplexer 8, the heat source side heat exchanger 3, the inter-refrigerant heat exchanger 6, and the utilization side heat exchanger 4. A first four-way switching valve 11 and a second four-way switching valve 12 for switching the road are provided. The heat exchanger 6 between refrigerants includes an inner pipe 6A and an outer pipe 6
B is a double-pipe heat exchanger including an inner pipe 6A and a liquid refrigerant flow passage, and an outer pipe 6B is a gas refrigerant flow passage.

The first four-way switching valve 11 is used for cooling operation (see FIG. 7).
The gas refrigerant from the generator 2 is supplied to the heat source side heat exchanger 3
And the gas refrigerant from the outer pipe 6B of the inter-refrigerant heat exchanger 6 is caused to flow into the absorber 5. During the heating operation (see FIG. 8), the gas refrigerant from the generator 2 is switched into the utilization side heat exchanger 4 and the gas refrigerant from the heat source side heat exchanger 3 is switched to the absorber 5 side during the heating operation. Inflow.

The second four-way switching valve 12 is used for cooling operation (see FIG. 7).
Gas flow from the utilization side heat exchanger 4 to the outer pipe 6B side of the inter-refrigerant heat exchanger 6, and the gas refrigerant flows into the absorber 5 from the outer pipe 6B of the inter-refrigerant heat exchanger 6 Let During heating operation (see FIG. 8), the generator 2 is switched.
From the outer pipe 6B of the inter-refrigerant heat exchanger 6 into the absorber 5.

The generator 2 is shown in FIGS. 1 to 3, and a gas burner 13 (see FIGS. 7 and 8) is provided in the lower part thereof. The gas burner 13 is a forced air blowing premixed combustion plate type gas burner, and supplies the working gas of the generator 2 with the combustion gas generated by the combustion of the gas.

The generator 2 is a dilute solution of an aqueous ammonia solution (ammonia dilute solution) at 10 to 20 atm.
It is heated to about 0 ° C. and boiled to generate a mixed vapor of ammonia and water. The generator 2 includes a cylindrical wall 14 having a vertical cylindrical shape, a heating plate 15 welded to a lower portion of the cylindrical wall 14 and directly heated by combustion gas generated by a gas burner 13, and a cylindrical wall. And a lid 16 for closing the upper part of 14.

At the center of the generator 2, a dilute solution outflow pipe 17 for letting out a dilute ammonia solution and supplying it to the absorber 5 is provided.
Is inserted from above to near the bottom (see FIGS. 7 and 8). In addition, the generator 2 guides the combustion gas generated by the gas burner 13 into the tubular wall 14 and then the tubular wall 14
It is equipped with 32 smoke tubes 20 that discharge to the surroundings.

Each smoke cylinder 20 has a predetermined thickness (for example, 0.4 to 2 mm) excellent in corrosion resistance and a small diameter (for example, 0.5).
(About 2 cm) is provided by bending a stainless pipe at a right angle through a corner portion 20R having a predetermined bending corner radius (for example, 1 to 3 cm). As shown in FIGS. The vertical pipes 20Y are parallel to each other and extend in the vertical direction, and the horizontal pipes 20Z extend in the horizontal direction via the corner portions 20R. A substantially upper half portion of the upper and lower pipes 20Y is a bellows processed portion 20A around which a large number of corrugated irregularities 21 are provided, and a lower half portion therebelow is an unprocessed portion 20B having a straight pipe shape. .

A large number of wavy irregularities 2 provided on the smoke pipe 20.
The processing method of No. 1 (= bellows processing portion 20A) will be described with reference to FIGS. 5 and 6. First, as shown in FIG. 5, with a predetermined thickness (for example, around 1 mm), a small diameter (for example, an outer diameter dimension is 1
A thin central jig 22A (for example, a rod-shaped jig that is thinner by about 2 mm than the inner diameter of the straight pipe 20α) for determining the inner diameter of the unevenness 21 is inserted into the straight pipe 20α (about cm). A jig ball 22B for forming a recess is arranged around the pipe 20α. This jig ball 22B is rotatably supported around the straight pipe 20α while pressing the straight pipe 20α, and the shape of the jig ball 22B determines the shape of the recess and each jig ball 22B. Is the pitch of the unevenness 21.

While pressing each jig ball 22B against the straight pipe 20α, the straight pipe 20α or the jig ball 22B is pushed into the straight pipe 2.
Rotate around 0α. Then, as shown in FIG.
A large number of irregularities 21 are formed around the straight pipe 20α by the pressing force of each jig ball 22B.

The smoke tubes 20 of this embodiment are arranged on four concentric circles with respect to the tubular wall 14, and eight smoke tubes 20 are provided at equal intervals on each circle. , The lower end of each smoke stack 20 is attached to the heating plate 15
It is inserted into each of the 32 holes provided on the heavy concentric circles, and joined by a welding technique without leakage. Further, the upper end of each smoke tube 20 is inserted into a hole provided in the tubular wall 14 with a predetermined pitch offset from each other, and is joined by a welding technique without leakage.

On the other hand, the generator 2 is arranged around the cylindrical wall 14,
A heating amount improving means for heating the tubular wall 14 from the surroundings by the combustion gas guided from the smoke tube 20 to the periphery of the tubular wall 14 is provided. The heating amount improving means is composed of an outer frame 23 that covers the periphery of the tubular wall 14, and a plurality of baffle plates 24 that are arranged in an annular space between the tubular wall 14 and the outer frame 23.

The outer frame 23 has a cylindrical shape coaxially arranged with the cylindrical wall 14, and is arranged so as to extend horizontally in an annular space between the cylindrical wall 14 and the outer frame 23. In addition, the combustion gas is meandered and guided downward by a plurality of baffle plates 24 that are vertically displaced and arranged in a plurality of stages. The outer frame 23 is provided with an exhaust pipe 25 for discharging the combustion gas led to the lower end of the annular space between the tubular wall 14 and the outer frame 23.

In this generator 2, the combustion gas produced by the primary combustion of the gas burner 13 heats the working fluid therein via the heating plate 15, and also passes through 32 smoke tubes 20 from the inside of the cylindrical wall 14. The hydraulic fluid is heated, and the cylindrical wall 14
The combustion gas guided to the surroundings of the cylinder heats the hydraulic fluid from the outside of the cylindrical wall 14 while meandering by the plurality of baffle plates 24, and is discharged to the outside via the exhaust pipe 25.

In particular, when the combustion gas passes through the smoke stack 20,
When the high-temperature combustion gas just generated in the gas burner 13 passes through the unprocessed portion 20B of the smoke stack, it heats the working fluid around the unprocessed portion 20B, where heat is taken away and the combustion gas whose temperature drops slightly When passing through the bellows processing part 20A of the smoke cylinder, the heating area of the hydraulic fluid is increased due to the large number of irregularities 21, and a turbulent flow is generated in the flow of the combustion gas flowing in the bellows processing part 20A to improve the heat transfer coefficient. Therefore, the heating rate of the working fluid by one smoke tube 20 becomes large.

As described above, the generator 2 has a small size, an extremely large heat transfer area, a long flow path of the combustion gas, and a long heating time of the working liquid by the combustion gas, so that the thermal efficiency is 80% at maximum. Can be increased to the extent. Therefore, a small generator 2 can be operated under high load, and a high refrigerating capacity as a refrigerating device can be obtained.

[Operation of Embodiment] Next, the operation of the cooling and heating water heater will be described. When the gas burner 13 starts combustion of the gas and the generated combustion gas heats the working fluid of the generator 2, a mixed vapor of ammonia as a refrigerant and water as an absorbing fluid is generated from the working fluid. Rises through the rectifier 7. In this rectifier 7, five-stage liquid storage shelves 7A-
7E is formed, and the working liquid (ammonia concentrated solution) supplied from the absorber 5 to the generator 2 sequentially flows down from the upper storage shelf 7A to the lower storage shelf 7E.

In the rectifier 7, each time the mixed vapor of ammonia and water rising from below passes through each of the liquid storage shelves 7A to 7E, the temperature of the mixed vapor and the contact of the concentrated ammonia solution from above cause contact in the mixed vapor. Ammonia concentration rises. The mixed vapor concentrated in the rectifier 7 is further endothermic by the partial condenser 8 in the upper stage, and water is condensed and separated to become about 99.8% ammonia gas.

[Cooling Operation] During the cooling operation, as shown in FIG. 7, this gas refrigerant is supplied to the heat source side heat exchanger 3 acting as a condenser through the first four-way switching valve 11 as shown by an arrow L. To be done. In the heat-source-side heat exchanger 3, the fan F cools the air to release the condensation heat and liquefy it, and the ammonia liquid (liquid refrigerant).
Becomes This liquid refrigerant passes through the inner pipe 6A of the inter-refrigerant heat exchanger 6 and is decompressed by the capillary tube 31 that functions as a decompression mechanism, and then the use side heat exchanger having a double-tube structure (acts as an evaporator). ) 4 flows in.

The liquid refrigerant exchanges heat with the use side heat medium (in this embodiment, water) supplied from the indoor unit in the use side heat exchanger 4 by driving the pump P1 through the use side heat medium flow path 32. Then, it evaporates (water is cooled and becomes a cooling heat source for cooling), and again becomes a gas refrigerant. This gas refrigerant is used in the second four-way switching valve 1
2 is sent to the outer pipe 6B of the inter-refrigerant heat exchanger 6, where the liquid refrigerant from the heat source side heat exchanger 3 (passes inside the inner pipe 6A)
Is cooled, and after performing heat exchange by heating itself, it is fed to the absorber 5 via the first four-way switching valve 11 and the second four-way switching valve 12.

This gas refrigerant is again absorbed in the working fluid supplied from the generator 2 to the absorber 5 in the absorber 5. That is, the sprayer 5B of the working fluid is provided at the uppermost stage in the absorber container 5A of the absorber 5, and the sprayer 5B is provided.
On the other hand, as shown by the arrow L1, the working liquid (3% ammonia dilute solution) is supplied from the generator 2 through the capillary tube 33 acting as a pressure reducing mechanism.

This diluted ammonia solution is sprayed from the sprayer 5B in the absorber container 5A, absorbs the gas refrigerant supplied from the heat exchanger 4 on the utilization side into the absorber container 5A, and reaches the bottom of the absorber container 5A. It drops into a certain liquid pool 5C. The working liquid (concentrated ammonia solution) in the liquid pool 5C is pumped by the pump P2 as indicated by arrows L2 and L3 in FIG. During this period, heat is exchange-heated by the heat exchanger 8A of the partial condenser 8 and the heat exchanger 5D of the absorber 5 for absorption heat recovery, and then the uppermost storage shelf 7A in the rectifier 7 is heated. Is supplied to.

[Heating Operation] During the heating operation, as shown in FIG. 8, the first four-way switching valve 11 and the second four-way switching valve 12 are switched, and the flow of the gas refrigerant (ammonia gas) flowing through the refrigeration circuit. The direction can be switched. The gas refrigerant (concentration 99.8%) generated in the partial condenser 8 passes through the first four-way switching valve 11 and the second four-way switching valve 12 as shown by an arrow L4, and is used side heat acting as a condenser. The heat flows into the exchanger 4, passes through the use-side heat medium flow path 32, and exchanges heat with the use-side heat medium (water in this embodiment) supplied from the indoor unit to be condensed. The water is thereby heated and becomes a heat source for heating in the indoor unit.

The refrigerant liquefied in the utilization side heat exchanger 4 is decompressed by the capillary tube 31 and then supplied to the heat source side heat exchanger 3 acting as an evaporator through the inner pipe 6A of the inter-refrigerant heat exchanger 6. And evaporates, and further the first four-way switching valve 1
1, outer pipe 6B of heat exchanger 6 between refrigerants, second four-way switching valve 12
And is supplied to the absorber 5. The generation, rectification, and partial condensation of the water-ammonia mixed vapor in the generator 2 and the absorption of the ammonia gas refrigerant in the absorber are the same as in the cooling operation shown in FIG. The flow of (concentrated ammonia solution and diluted ammonia solution) is the same as in FIG. 7.

In this embodiment, a heat exchanger 5D for recovering absorbed heat, a heat exchanger 5E for heat sources such as hot water supply, and a heat exchanger 5F for both cooling and heating are provided in the absorber 5. The heat exchanger 5E for a heat source such as hot water supply is connected to the hot water supply tank 34, the bath tub 35, the bathroom dryer 36, etc. via a pump P3 to form a hot water supply cycle using hot water as a heat medium.

On the inlet side and the outlet side of the heat exchanger 5F for both heating and cooling, there are provided a branch outward path 41 branched from the use side heat medium flow path 32 at the outlet of the use side heat exchanger 4 via the three-way switching valve V1. , Branch return path 4 that joins the downstream side of the three-way switching valve V1
The two sides are connected to each other. The outlet side of the pump P4 in the cooling water flow passage 44 connecting the heat radiation heat exchanger 43 and the pump P4 is connected to the branch outward passage 41 via the three-way switching valve V2, while the heat radiation in the cooling water flow passage 44 is released. The inlet side of the heat exchanger 43 is connected to the branch return path 42 via a three-way switching valve V3.

In the cooling operation, the three-way switching valves V2 and V3 are opened on the cooling water passage 44 side and closed on the branch outward passage 41 and branch return passage 42 sides as shown in FIG. As shown in FIG.
The side is closed and the branch outward path 41 and the branch return path 42 are controlled to be open. Therefore, during the cooling operation, the heat exchanger 5F for both heating and cooling is not supplied with the use-side heat medium, but the cooling water from the heat exchanger 43 for heat radiation is supplied, and during the heating operation, the heat exchanger for both heating and cooling is provided. The use-side heat medium is supplied to 5F, and the cooling water is not supplied from the heat dissipation heat exchanger 43.

[Effect of Embodiment] The generator 2 of this embodiment is
A large number of irregularities 21 increase the heating area of the working fluid by the smoke tube 20, and a turbulent flow occurs in the flow of the combustion gas flowing in the bellows processing portion 20A (the large number of irregularities 21) to improve the heat transfer coefficient. As a result of the heat promotion effect, the heating rate of the working fluid by one smoke tube 20 increases.

As described above, since the heating rate of each smoke stack 20 is greatly improved, the refrigerating capacity of the cooling and heating water heater is improved. Moreover, the heating rate of the working fluid by the heating amount improving means provided around the cylindrical wall 14 in the related art can be reduced. Specifically, the heavy copper corrugated fins that have been conventionally used as the heating amount improving means can be eliminated, and the baffle plate 24 can be made lightweight, and the weight of the generator 2 can be reduced.

Particularly, in this embodiment, the upper and lower pipes 20Y
Of the above, substantially the upper half part is the bellows processed part 20A and the lower half part is the unprocessed part 20B, so that the heat exchange between the combustion gas in the smoke tube 20 and the working liquid around the smoke tube 20 is performed. Can be made uniform throughout. That is, when the bellows processing portion 20A is also formed in the substantially lower half, the high temperature combustion gas just generated in the burner excessively heats the hydraulic fluid due to the increase in the heating area by the bellows processing portion 20A and the occurrence of turbulence. As a result, the durability of the smoke stack 20 deteriorates, such as the occurrence of bumping and damage to the smoke stack 20, but this problem can be avoided by forming the substantially lower half portion as the unprocessed portion 20B.

The corner portion 20R and the horizontal pipe 20Z downstream thereof may also be the bellows processing portion 20A. In this embodiment, the workability of the bellows processing portion 20A is taken into consideration, and the corner portion 20R and the horizontal pipe 20Z are taken into consideration. In consideration of the fact that the temperature of the combustion gas flowing therethrough does not significantly contribute to the heating of the hydraulic fluid, the bellows processing portion 20A is provided only in the substantially upper half of the upper and lower pipes 20Y.

[Modification] In the above embodiment, an example in which the bellows processing portion 20A is provided in a part of the smoke tube 20 is shown, but the heating plate 15 and the tubular wall 14 are uneven in all parts except the insertion part. 21 may be provided to form the bellows processing portion 20A. Also,
In the above embodiment, an example in which a large number of irregularities 21 are provided by using the central jig 22A is shown, but the inner diameter of the irregularities 21 is determined by the pressing stroke of the jig ball 22B without using the central jig 22A. You may.

[Brief description of drawings]

FIG. 1 is a side sectional view of a generator (example).

FIG. 2 is a sectional view taken along line AA of FIG. 1 (Example).

FIG. 3 is a sectional view taken along line BB in FIG. 1 (Example).

FIG. 4 is a side view of the smoke tube (example).

FIG. 5 is an explanatory view showing a manufacturing method for forming irregularities around the smoke tube (Example).

FIG. 6 is an explanatory view showing a manufacturing method for forming irregularities around the smoke tube (Example).

FIG. 7 is a schematic configuration diagram of a cooling and heating hot water supply apparatus using an absorption refrigeration apparatus (Example).

FIG. 8 is a schematic configuration diagram of a cooling and heating hot water supply device using an absorption refrigeration system (Example).

FIG. 9 is a side sectional view of a generator (prior art).

FIG. 10 is a top view of FIG. 9 (prior art).

[Explanation of symbols]

1 Absorption type refrigeration system 2 Generator 3 Heat source side heat exchanger (acts as a condenser during cooling operation, acts as an evaporator during heating operation) 4 Utilization side heat exchanger (acts as evaporator during cooling operation and a condenser during heating operation) 5 absorber 7 rectifier 8 dephlegmator 13 gas burner 14 tubular wall 15 heating plate 20 smoke pipe 20A bellows processed part 20B unprocessed part 20α straight pipe 21 unevenness 22A center jig 22B jig ball 23 outer frame 24 baffle plate

Claims (4)

[Claims] 1. A generator for heating a working fluid, which is a mixture of a refrigerant and an absorbing liquid, with a burner to generate a mixed working fluid vapor of the refrigerant and the absorbing liquid; and a rectifying of the mixed working fluid vapor to produce a refrigerant component. A rectifying device for concentrating, a condenser for condensing the gas refrigerant component of the concentrated mixed working liquid vapor, an evaporator for evaporating the liquid refrigerant condensed by the condenser, and a refrigerant vapor evaporated by the evaporator. In an absorption type refrigerating apparatus having an absorber that absorbs into a dilute hydraulic fluid, the generator includes a tubular wall having a substantially cylindrical container shape, and one end of the tubular wall is provided with the burner. A heating plate heated by the generated combustion gas is provided, and the combustion gas generated by the burner is provided in the tubular wall.
An absorption refrigerating apparatus comprising: a plurality of smoke tubes that are guided from the heating plate into the tubular wall, and a plurality of irregularities are provided around the plurality of smoke tubes. 2. A generator for heating a working fluid, which is a mixture of a refrigerant and an absorbing liquid, by a burner to generate a mixed working fluid vapor of the refrigerant and the absorbing liquid; and a rectification of the mixed working fluid vapor to produce a refrigerant component. A rectifying device for concentrating, a condenser for condensing the gas refrigerant component of the concentrated mixed working liquid vapor, an evaporator for evaporating the liquid refrigerant condensed by the condenser, and a refrigerant vapor evaporated by the evaporator. In an absorption type refrigerating apparatus having an absorber that absorbs into a dilute hydraulic fluid, the generator includes a tubular wall having a substantially cylindrical container shape, and one end of the tubular wall is provided with the burner. A heating plate heated by the generated combustion gas is provided, and the combustion gas generated by the burner is provided in the tubular wall.
A plurality of smoke tubes are introduced from the heating plate into the tubular wall, and the plurality of smoke tubes have a substantially upper half portion which is a bellows-processed portion provided with a large number of irregularities, and a lower half portion of which has a straight pipe shape. An absorption type refrigerating device, which is a non-processed part. 3. The absorption type refrigerating apparatus according to claim 1 or 2, wherein the smoke cylinder has a jig ball arranged around a straight pipe, and the jig ball presses the straight pipe while An absorption type refrigerating apparatus characterized in that a large number of irregularities are formed by rotating a pipe or the jig ball around the straight pipe. 4. The absorption refrigerating apparatus according to claim 3, wherein the smoke tube has a central jig smaller than an inner diameter of the straight pipe inserted in the straight pipe, and the heat pipe is surrounded by the straight pipe. By arranging a tool ball and rotating the straight tube or the jig ball around the straight tube while the jig ball presses the straight tube, it is possible to form the large number of irregularities. A characteristic absorption refrigeration system.