JPH1183240A - Heat exchanger for absorption type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a corner of a container perpendicularly by forming bodies of a heat exchanger and an absorber integrated by connecting ends of the exchanger and absorber aligned in parallel via a gap between the exchanger and the absorber via a communicating part of an extruding material of aluminum alloy. SOLUTION: A twin heat exchanger is formed by integrating an evaporator with an absorber. And, the exchanger has a first body 41, a first bottom cover 42, a second body 43, a second bottom cover 44 and a communicating part 17. The body 41 fully contains an element corresponding to a heat absorbing coil to its corner. The body 43 fully contains an element corresponding to a cooling coil to its corner. And, the part 17 contains a refrigerant scattering tube and an absorbent liquid scattering tube. In this case, aluminum alloy is extruded, and a lengthy rectangular tube is manufactured. The tube is cut in a predetermined length by a cutter. And, the body 41 or body 43 is formed. Meanwhile, four corners of the aluminum alloy plate are cut out, and welded to manufacture a cover-like communicating part 17 of a lunch box.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a heat exchanger for an absorption type air conditioner.

[0002]

2. Description of the Related Art A main part of an air conditioner called an air conditioner mainly employs a vapor compression type refrigerator and an absorption type refrigerator, and a vapor compression type refrigerator for compressing a refrigerant by a compressor is widely used. Although it is widespread, if the sound of the compressor is a concern, an absorption refrigerator that chemically performs the compression process is employed. For example, FIG. 1 of JP-A-6-101984 “heat exchanger tubes for heat exchanger” shows a principle diagram of an absorption refrigerator. According to this figure, an absorber 2, a regenerator 3, a condenser 4,
The refrigerant (liquid or vapor) and the absorbent (concentrated or dilute) are circulated through the expansion valve 5, the evaporator 6 and the internal heat exchanger 8, so that the heat is absorbed by the evaporator 6 and It dissipates heat.

[0003] As is apparent from the figure, the absorber 2, the regenerator 3, the condenser 4, and the evaporator 6 are devices that perform heat absorption, heat radiation, heating or cooling, and thus fall into the category of heat exchangers. Therefore, the absorber 2, the regenerator 3, the condenser 4, the evaporator 6, and the internal heat exchanger 8 can be called a heat exchanger of the absorption type air conditioner. FIG. 13 of the publication discloses heat transfer tubes 3.
A regenerator 40 is shown in which containers such as 0...

FIG. 10 is an exploded view showing an example of a heat exchanger container of a conventional absorption type air conditioner.
0 to manufacture the first cup 101 and the first lid 1
02, the second lid 103, and the second cup 104 are prepared. Then, they are integrated by welding or brazing as shown by arrows. FIG. 11 is a cross-sectional view of a heat exchanger vessel of a conventional absorption type air conditioner. The heat exchanger is formed by interposing elements 106 and 107 inside the first cup 101 and the second cup 104. .

[0005]

The above-mentioned first cup 101
Can be manufactured by welding the upper, lower, front, rear, and left five plates. The same applies to the second cup 104.
However, the manufacturing cost increases. Therefore, the cups 101 and 104 are generally obtained by a drawing method. This is because productivity is high and manufacturing cost can be reduced. However, aluminum alloy has poor formability, and when drawing, the above-mentioned FIG.
As shown in FIG. 1, the corners 108... Must be provided with relatively large radiuses, and due to the presence of these radiuses, the elements cannot be arranged to the corners, and the heat exchange is reduced due to poor storage efficiency. The container 100 becomes large. Therefore, an object of the present invention is to provide a technique capable of making a corner of a container a right angle.

[0006]

According to a first aspect of the present invention, an evaporator and an absorber of an absorption-type air conditioner are arranged in parallel with a gap therebetween, and one end thereof is connected by a communication portion. The extruded material of the aluminum alloy is used for the body of the heat exchanger and the body of the absorber. The element is stored in the body, and the open end is closed with the bottom lid. A right angle can be formed between the body and the bottom lid, and the element can be arranged to the corner.

A second aspect of the present invention is characterized in that the extruded material has a cross section in which the evaporator space, the gap and the absorber space are arranged. A communication part is attached to one end of the body having a cross section in the shape of a cross, and the other end is closed with a bottom lid. Since the body can be manufactured without pressing or welding, the manufacturing cost can be reduced.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a principle diagram of an absorption type air conditioner according to the present invention. In the following description, it is preferable to use pure water or ammonia water as the refrigerant and LiBr (lithium bromide) as the absorbing liquid. The absorption type air conditioner 1
Low-pressure refrigerant liquid 1 from refrigerant distribution pipe 11 of twin heat exchanger 10
2 to the evaporator space 14 of the evaporator 13 and the refrigerant liquid 12
Cools the heat absorbing coil 15. That is, the refrigerant liquid 12 becomes the refrigerant vapor 16 by absorbing the heat. From this, the evaporator 1
At 3, the heat of Qi was absorbed from outside via the heat absorbing coil 15. The refrigerant vapor 16 reaches the adjacent absorber 20 through the upper communication portion 17.

In the absorber 20, an absorbing liquid (concentrated liquid) 22 is sprayed from an absorbing liquid spray pipe 21 to an absorber space 23 and brought into contact with the refrigerant vapor 16. As a result, the concentration of the absorbing solution decreases and changes to the absorbing solution (dilute solution) 24. At this time, the cooling coil 2
By cooling at 5, the absorption capacity is increased.

[0010] The absorbing liquid (dilute liquid) 24 is sent to a regenerator 27 by a pump 26, and the regenerator 27 is heated by a heating coil 28. The heating causes the refrigerant contained in the absorbing liquid (dilute liquid) 24 to evaporate. Due to the evaporation of the refrigerant, the absorbing liquid becomes thick and returns to the absorbing liquid (concentrated liquid) 22. Thus, the absorbing liquid circulates between the absorber 20 and the regenerator 27.

The refrigerant vapor separated in the regenerator 27 is supplied to the condenser 2
9, the condenser 29 gives heat to the heat radiation coil 31 and liquefies itself to become a high-pressure refrigerant liquid. Therefore, it means that the heat of Qo was released outside by the condenser 29. The high-pressure refrigerant liquid is changed to a low-pressure refrigerant liquid by being expanded by the expansion valve 32,
It faces the refrigerant distribution tube 11. For example, the indoor heat Qi is
By absorbing the heat Qo to the outside in the condenser 29, a so-called cooler device is obtained. Although detailed description is omitted, outdoor heat Qi is absorbed by the evaporator 13 and the condenser 29
By releasing the heat Qo into the room, a so-called heater device can be obtained, which is the operating principle of the absorption type air conditioner. The refrigerant is TFE (tri-fluoro-
Ethanol) and the absorbing solution may be DMI (dimethyl imidazolidone).

As is apparent from the figure, the evaporator 13, the absorber 20, the regenerator 27 and the condenser 29 are all heat exchangers. Among them, the twin heat exchanger 10 integrates the evaporator 13 and the absorber 20. The evaporator 1
3 has a relatively low temperature and the absorber 20 has a high temperature, so that a gap 33 for heat insulation is provided between the two.

FIG. 2 shows a twin heat exchanger (first embodiment) according to the present invention.
FIG. 3 is a cross-sectional view of Example), in which the twin heat exchanger 10 is one in which the evaporator 13 and the absorber 20 are integrated as described above, and the first body 41, the first bottom lid 42, and the second Trunk 43,
The first body 41 is composed of the second bottom cover 44 and the communication portion 17.
The element 45 corresponding to the heat absorbing coil is fully accommodated in the corner, the element 46 equivalent to the cooling coil is fully accommodated in the second body 43 to the corner, and the refrigerant distribution pipe 11 and the absorption liquid distribution pipe are disposed in the communication part 17. 21 is stored.

A method for manufacturing the twin heat exchanger 10 of the first embodiment described above will be described with reference to FIGS. FIG.
(D) is a manufacturing procedure diagram of the twin heat exchanger (first embodiment) according to the present invention. (A): An A3000 series aluminum alloy (preferably A3003) material 54 is loaded into a container 53 equipped with a hollow dice 52 with a mandrel 51, and is warmed to the extrusion temperature. And a long rectangular tube 57 is manufactured. The mandrel 51 is supported by the three or four legs 58 on the die 52 side.
4 is a distraction, but the material 54 is
And merges past the leg 58. Therefore, the hollow material can be extruded.

(B): The square tube 57 is cut into a predetermined length by the cutter 59 to form the first body 41 or the second body 43. (C): On the other hand, an aluminum alloy plate 61 is prepared and four corners are cut out. (D): Then, the lid-shaped communication portion 17 of the lunch box is manufactured. 62 is a welding bead.

FIG. 4 shows a twin heat exchanger (first embodiment) according to the present invention.
FIG. 2 is an exploded perspective view of the first embodiment 4 of the present invention.
1, the second trunk portion 43 and the communication portion 17, and in addition, the first bottom cover 4
2. A second bottom cover 44, a button-type spacer 63, and a channel-type spacer 64 are prepared, combined with each other, and integrated by welding or brazing necessary parts. The elements 45 and 46 and the scatter tube 1 shown in FIG.
1, 21 are incorporated as appropriate. Thus, the twin heat exchanger 10 of FIG. 2 can be obtained.

As is apparent from FIG. 2, since the body portions 41, 43 are square tubes and the right angles are formed between the bottom portions 42, 44,
The elements 45 and 46 can be arranged to the corners of the container, and the body portions 41 and 43 can be made compact.
As is clear from FIGS. 3A and 3B, the trunks 41 and 4
Reference numeral 3 denotes an extruded material, which can be obtained by cutting a long material, so that mass production is possible and manufacturing cost can be reduced.

A description will now be given of another embodiment of the first embodiment, wherein B is used for the unique member of the second embodiment, C is used for the unique member of the third embodiment, and D is used for the unique member of the fourth embodiment. To distinguish them. For the other members, the reference numerals of the first embodiment are diverted as they are, and the detailed description is omitted. FIG. 5 is an exploded perspective view of a twin heat exchanger (second embodiment) according to the present invention. In the extrusion process, it is possible to make the cross section of the twin heat exchanger 10B quite free.
A flange 47 protruding by about 10 mm is integrally formed.
Then, the flange 47 is partially cut to form the air passage 4.
8, 48 are provided. Similarly, the flange 4 is attached to the second body 43B.
9 is integrally formed.

FIG. 6 shows a twin heat exchanger according to the present invention (second heat exchanger).
FIG. 9 is a cross-sectional view of the first embodiment, in which a gap for heat insulation can be secured by a flange 49, and the channel-type spacer 64 of the first embodiment is replaced with a simple blind plate 65, and the button-type spacer of the first embodiment. 63 can be abolished. The flanges 47 (see FIG. 5) and 49 are the first and second body portions 41B,
Although one sheet is provided for each of 43B, two sheets may be provided for one and the other without flange.

FIG. 7 shows a twin heat exchanger (third heat exchanger) according to the present invention.
It is an exploded perspective view of Example). By providing two mandrels in a hollow dice, it is possible to produce an extruded long material having a cross section of an “eye”. That is, the evaporator space 1
4, a cross-sectional material in which the gap 33 and the absorber space 23 are arranged. Therefore, in the twin heat exchanger 10C, slits 68 for venting are opened in the body 67 having a cross-shaped cross section,
The body 67 has the first and second bottom lids 42 and 44 and the communication portion 1.
7 is attached. Since the joining of the first and second body portions 41, 43 (or 41B, 43B) performed in the first and second embodiments becomes unnecessary, the number of assembling steps is reduced.

FIG. 8 shows a twin heat exchanger according to the present invention (fourth heat exchanger).
It is an exploded perspective view of Example). The first body 41D and the second body 43D are obtained by cutting the square tube 57 (see FIG. 3). The twin heat exchanger 10D is formed by cutting the square tube 57 (see FIG. 3) as long as the communicating portion 17 in the longitudinal direction and providing communicating holes 66, 66. The frame spacer 69 has a hole 69 a having the same size as the communication hole 66.
42a is a first upper lid, and 44a is a second upper lid.

FIG. 9 shows a twin heat exchanger (fourth embodiment) according to the present invention.
FIG. 14 is a cross-sectional view of Example), and a gap for heat insulation is secured by a frame type spacer 69, and communication holes 66, 66 can be connected. Further, since the first trunk portion 41D and the second trunk portion 43D are elongated in the longitudinal direction and the communication holes 66, 66 are provided in the extension portions, the components of the communication portion 17 can be omitted.

By utilizing the present invention, the evaporator, the absorber, the regenerator or the condenser of the absorption type air conditioner are each made to be a single heat exchanger, and these body parts are respectively made of extruded material. It may be. This is because the elements can be densely arranged up to the corner of the container. Although the present invention employs an extruded material in consideration of productivity, a commercially available square pipe may be purchased and cut into a predetermined length and applied to the body of the heat exchanger.

[0024]

According to the present invention, the following effects are exhibited by the above configuration. The evaporator and the absorber of the absorption type air conditioner are arranged in parallel with a gap therebetween, and the body of the heat exchanger and the body of the absorber integrated by connecting one end to each other by a communication part are made of aluminum. It is characterized by using an extruded material of an alloy. A right angle can be formed between the body and the bottom lid, and the element can be arranged to the corner. Since it is an extruded material, mass production is easy, and production costs can be easily reduced. Since the aluminum alloy is used, the weight of the heat exchanger can be reduced.

A second aspect of the present invention is characterized in that the extruded material has a cross section in which the evaporator space, the gap and the absorber space are arranged. All of the evaporator space, the gap and the absorber space can be formed by the extruded material body having the cross-section in the cross section, and the body can be manufactured without pressing or welding, so that the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a principle diagram of an absorption type air conditioner according to the present invention.

FIG. 2 is a sectional view of a twin heat exchanger (first embodiment) according to the present invention.

FIG. 3 is a manufacturing procedure diagram of a twin heat exchanger (first embodiment) according to the present invention.

FIG. 4 is an exploded perspective view of a twin heat exchanger (first embodiment) according to the present invention.

FIG. 5 is an exploded perspective view of a twin heat exchanger (second embodiment) according to the present invention.

FIG. 6 is a sectional view of a twin heat exchanger (second embodiment) according to the present invention.

FIG. 7 is an exploded perspective view of a twin heat exchanger (third embodiment) according to the present invention.

FIG. 8 is an exploded perspective view of a twin heat exchanger (fourth embodiment) according to the present invention.

FIG. 9 is a sectional view of a twin heat exchanger (fourth embodiment) according to the present invention.

FIG. 10 is an exploded view showing an example of a heat exchanger container of a conventional absorption type air conditioner.

FIG. 11 is a sectional view of a heat exchanger container of a conventional absorption type air conditioner.

[Explanation of symbols]

1. Absorption type air conditioner, 10, 10B, 10C, 10
D: heat exchanger (twin heat exchanger), 13: evaporator, 14
... Evaporator space, 17 ... Communication part, 20 ... Absorber, 23 ... Absorber space, 33 ... Gap, 41, 41B, 41D ... Body (first body), 43, 43B, 43D ... Body (No. 2 trunks), 67 ... trunks (extruded cross-section eyes).

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hidetaka Kainuma 1-4-1 Chuo, Wako-shi, Saitama Prefecture Inside Honda R & D Co., Ltd. (72) Inventor Tohru Fukuda 1-4-1 Chuo, Wako-shi, Saitama No. In Honda R & D Co., Ltd.

Claims (2)

[Claims] 1. A heat exchanger in which an evaporator and an absorber of an absorption-type air conditioner are arranged in parallel with a gap therebetween and one end thereof is connected by a communication portion to form a unit. A heat exchanger for an absorption type air conditioner, wherein the body of the absorber is made of extruded aluminum alloy. 2. The heat exchanger for an absorption type air conditioner according to claim 1, wherein the extruded material is a cross-sectional material in which an evaporator space, the gap and the absorber space are arranged.