JPH04281166A - Refrigerant distributor - Google Patents

Abstract

PURPOSE:To contrive the simplification of a structure, the miniaturization of an installation space and the uniform distribution of refrigerant by developing a roll-bond type refrigerant distributor. CONSTITUTION:In a refrigerant distributor for distributing refrigerant to a plurality of refrigerant passages 2, 2 of a heat exchanger 1, a roll-bond body 3 is constituted by bonding a pair of sheet members 4, 4 to each other. Distributing pipe units 5, 5, connected to the inlet ports 2a, 2a of respective refrigerant passages 2, 2, and a distributing unit 6 for distributing the refrigerant into said distributing pipes 5, 5 are formed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant distributor for distributing refrigerant to a plurality of refrigerant paths in a heat exchanger.

0002

BACKGROUND ART Methods for distributing refrigerant to multiple refrigerant paths in a heat exchanger include a method using a flow divider as disclosed in Japanese Utility Model Application No. 57-21987, or a method using a flow divider as disclosed in Japanese Utility Model Application No. 55-181163. A method using a header, as disclosed in the above publication, is well known.

In the former method of the above methods, a flow divider and a flow divider pipe for supplying the refrigerant divided by the flow divider to the plurality of refrigerant paths of the heat exchanger are required, and in addition, the refrigerant flow resistance in the flow divider is required. In order to adopt a structure to prevent the refrigerant drift caused by such factors, there are problems in that not only the structure becomes complicated but also the installation space becomes large. Furthermore, the flow divider itself is relatively expensive, which is an obstacle to reducing costs. On the other hand, in the latter case, although it is advantageous in terms of cost and does not require a large installation space, it has the disadvantage that refrigerant drift tends to occur and it is difficult to distribute the refrigerant evenly.

0004

[Problems to be Solved by the Invention] The object of the present invention is to solve the above problems, and by developing a roll bond type refrigerant distributor, the structure can be simplified and the installation space can be reduced. The purpose of this is to achieve uniform distribution of refrigerant.

[0005]

[Means for Solving the Problem] In the invention of claim 1, as a means for solving the above problem, as shown in the drawings, a refrigerant is supplied to a plurality of refrigerant paths 2, 2, etc. of a heat exchanger 1. In the refrigerant distributor for distributing, a pair of plate members 4
, 4 are joined to each other to form a roll bond body 3, and each of the refrigerant paths 2, 2
The branch pipe section 5 connected to the inlet section 2a, 2a,...
5... and a branching section 6 which is to distribute refrigerant to the branching pipe sections 5, 5....

In the invention of claim 2, as a means for solving the above problem, as shown in the drawing, in the refrigerant distributor according to claim 1, each of the refrigerants is disposed between the plate members 4, 4. U-shaped connecting pipe portions 14, 14, . . . are formed in the middle of the paths 2, 2, .

In the invention of claim 3, as a means for solving the above problem, as shown in the drawings, in the refrigerant distributor according to claim 1 or 2, an additional sheet is provided for the roll bond body 3. At the same time, a header portion 15 is formed between the roll bond body 3 and the plate-like member 4 to be connected to the outlet portions 2b, 2b, etc. of the refrigerant paths 2, 2, etc. are doing.

According to a fourth aspect of the invention, as a means for solving the above problem, as shown in the drawings, in the refrigerant distributor according to the first or second aspect, both longitudinal ends 3a, 3a and cover the bottom to form a bottomed cylindrical body 16, and the bottomed cylindrical body 1
6 is used as a header section 15.

[0009]

[Function] According to the invention of claim 1, the following effects can be obtained by the above-mentioned means.

That is, since the flow dividing section 6 and the flow dividing pipe sections 5, 5, etc. for distributing the refrigerant are integrally formed within the roll bond body 3, the structure is simplified and greatly reduced in size. can.

[0011] In the invention of claim 2, the following effects can be obtained by the above means.

That is, since the branching section 6, the branching pipe sections 5, 5, . . . and the U-shaped connecting pipe sections 14, 14, etc. for distributing the refrigerant are integrally formed within the roll bond body 3,
The structure is simple and can be significantly downsized.

[0013] According to the third aspect of the invention, the following effects can be obtained by the above means.

That is, the branching section 6 for distributing the refrigerant, the branching pipe sections 5, 5, . . ., the U-shaped connecting pipe sections 14, 14, . This simplifies the structure and allows it to be significantly more compact.

[0015] In the invention of claim 4, the following effects can be obtained by the above-mentioned means.

That is, both longitudinal ends 3a of the roll bond body 3
, 3a and by covering the bottom portions, a bottomed cylindrical body 16 whose interior serves as a header portion 15 is constructed, which simplifies the structure and makes it significantly more compact.

[0017]

According to the invention of claim 1, in the refrigerant distributor for distributing refrigerant to the plurality of refrigerant paths 2, 2, etc. of the heat exchanger 1, the pair of plate-like members 4, 4 are provided. They are joined together to form a roll bond body 3, and between the plate members 4, 4, there is an inlet portion 2 for each of the refrigerant paths 2, 2...
The structure is simple because the branch pipe sections 5, 5, etc., which are connected to the branch pipe sections 5, 5, and so on, and the branch section 6, which is to distribute refrigerant to the branch pipe sections 5, 5, and so on, are formed. As well as,
It can be made much more compact, which has the excellent effect of saving space and reducing costs. In addition, by appropriately processing the plate members 4, 4 constituting the roll bond body 3, it is possible to easily manufacture the flow dividing section 6 with a complicated structure, and to design the flow path diameter of the flow dividing pipe sections 5, 5... Since this can be done extremely easily, it also has the effect of making it possible to evenly distribute the refrigerant.

According to the second aspect of the invention, in the refrigerant distributor according to the first aspect, the refrigerant path is provided between the plate members 4, 4 constituting the roll bond body 3, in the middle of each refrigerant path 2, 2, etc. Since the U-shaped connecting pipe portions 14, 14, etc. are formed, further compactness can be achieved, and there is an excellent effect that space saving and cost can be reduced.

According to the third aspect of the invention, in the refrigerant distributor according to the first or second aspect, another plate member 4 is bonded to the roll bond body 3, and the roll bond body 3 and the plate are bonded together. Between the shaped member 4, each refrigerant path 2, 2.
The header part 15 connected to the outlet parts 2b, 2b...
Since it is formed, it is possible to achieve even further compactness, which has the excellent effect of making it possible to save space and reduce costs.

According to the invention of claim 4, in the refrigerant distributor according to claim 1 or 2, the longitudinal ends 3a, 3a of the roll bond body 3 are joined and the bottom is covered to form the bottomed cylindrical body 16. In addition, since the inside of the bottomed cylindrical body 16 is formed as the header part 15, the structure is simple and can be made significantly compact, which is an excellent feature that saves space and reduces costs. effective.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1 FIGS. 1 and 2 show a refrigerant distributor according to Embodiment 1 of the present invention. This embodiment corresponds to the invention of claim 1.

The refrigerant distributor A of this embodiment is for evenly distributing refrigerant to a plurality of refrigerant paths 2, 2 of a cross-fin coil type heat exchanger 1, and includes a pair of plate-shaped members 4,
The roll bonded body 3 is obtained by joining 4 to each other. Between the plate members 4, 4 in the roll bond body 3, an inlet portion 2 of each refrigerant path 2, 2 is provided.
The branch pipe parts 5, 5 connected to a, 2a, and the branch pipe part 5
, 5, and an inlet pipe section 7 for introducing the refrigerant into the dividing section 6 are formed. A refrigerant pipe 8 connected to an expansion valve (not shown) is connected to the inlet pipe portion 7. Further, each of the refrigerant paths 2,
The two outlet portions 2b, 2b are connected to the header 9.

[0024] The flow path diameter of the branch pipe parts 5, 5 is larger than that of the branch part 6.
It is designed to equalize the pressure loss from the to the inlet parts 2a, 2a. That is, the passage diameter of the branch pipe section 5 having a longer length from the branch part 6 to the inlet part 2a is larger than the passage diameter of the branch pipe part 5 having a shorter length from the branch part 6 to the inlet part 2a. It is designed to be. Such a design is
This is easy because the flow branch pipe parts 5, 5 can be formed at the same time as the roll bond body 3 is formed.

The inlet portion 2a and outlet portion 2b of the refrigerant path 2 are constituted by an inlet connecting pipe 11 and an outlet connecting pipe 12 connected to the ends of the heat transfer tubes 10 of the heat exchanger 1 (see FIG. (see 2). Moreover, a U-shaped connecting pipe 13 for connecting the heat exchanger tubes 10, 10 is provided in the middle of the refrigerant path 2.

With the above-described structure, the flow branch pipe parts 5, 5, the flow branch part 6 and the inlet pipe part 7 are connected to the roll bond body 3.
Since it can be constructed in one piece, the structure is simple and can be significantly more compact, saving space and
Low cost becomes possible. In addition, the refrigerant introduced into the dividing section 6 via the refrigerant pipe 8 is distributed to the dividing pipe sections 5, 5 in the dividing section 6, and is supplied to each refrigerant path 2, 2. Since the pressure loss in the parts 5, 5 is made equal, it is possible to equalize the refrigerant distribution.

The refrigerant distributor of this embodiment is suitable for a cross-fin coil type heat exchanger having one or more rows of heat transfer tubes.

Embodiment 2 FIGS. 3 and 4 show a refrigerant distributor according to Embodiment 2 of the present invention. This embodiment corresponds to claims 1, 2, and 3 of the invention.

In the case of this embodiment, between the plate members 4, 4 constituting the roll bond body 3, the flow branch pipe portions 5, 5,
Outside the flow dividing section 6 and the inlet pipe section 7, U-shaped connecting pipe sections 14, 14, . . . are formed in the middle of the refrigerant paths 2, 2.

Furthermore, another plate member 4 is bonded to the roll bond body 3.
A header portion 15 is formed between the refrigerant paths 2 and the plate member 4, and is connected to the outlet portions 2b, 2b of the respective refrigerant paths 2, 2. Reference numeral 17 is an outlet pipe of the header section 15.

[0031] With the above configuration, the flow branch pipe sections 5, 5, the flow branch section 6, the inlet pipe section 7, the U-shaped connecting pipe sections 14, 1
4 and the header portion 15 can be integrally constructed by the roll bond body 3, the structure becomes simple and can be significantly downsized, making it possible to save space and reduce costs. The other configurations and effects are the same as those of the first embodiment, so their explanations will be omitted.

The refrigerant distributor of this embodiment is suitable for a cross-fin coil type heat exchanger having one row of heat transfer tubes.

Embodiment 3 FIGS. 5 and 6 show a refrigerant distributor according to Embodiment 3 of the present invention. This embodiment is based on claims 1 and 4.
This corresponds to the invention of

In the case of this embodiment, a bottomed cylindrical body 16 is constructed by joining the longitudinal ends 3a, 3a of a roll-bonded body 3 having the same structure as in the first embodiment and covering the bottom. The inside of the cylindrical body 16 serves as a header portion 15. code 1
7 is a header outlet pipe. The other configurations and effects are the same as those of the first embodiment, so their explanations will be omitted.

The refrigerant distributor of this embodiment is suitable for a cross-fin coil type heat exchanger having one or more rows of heat transfer tubes.

Embodiment 4 FIG. 7 shows a refrigerant distributor according to Embodiment 4 of the present invention. This embodiment corresponds to claims 1, 2, and 4 of the invention.

In the case of this embodiment, U-shaped connecting pipe portions 14, 14, . The other configurations and effects are the same as those of the third embodiment, so their explanations will be omitted.

The refrigerant distributor of this embodiment is suitable for a cross-fin coil type heat exchanger having one or more rows of heat transfer tubes.

Although each of the above embodiments has been described with reference to two refrigerant paths, it goes without saying that the present invention can also be applied to systems with three or more refrigerant paths.

Furthermore, the present invention is not limited to the configurations of the embodiments described above, and it goes without saying that the design can be changed as appropriate without departing from the gist of the invention.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a refrigerant distributor according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II in FIG. 1;

FIG. 3 is a perspective view showing a refrigerant distributor according to a second embodiment of the present invention.

FIG. 4 is an enlarged sectional view taken along IV-IV in FIG. 3;

FIG. 5 is a perspective view showing a refrigerant distributor according to a third embodiment of the present invention.

FIG. 6 is a sectional view taken along VI-VI in FIG. 5;

FIG. 7 is a perspective view showing a refrigerant distributor according to a fourth embodiment of the present invention.

[Explanation of symbols]

1 is a heat exchanger, 2 is a refrigerant path, 2a is a refrigerant path inlet,
2b is a refrigerant path outlet, 3 is a roll bond body, 3a is a longitudinal end, 4 is a plate-like member, 5 is a branch pipe part, 6 is a branch part, 1
4 is a U-shaped connecting pipe part, 15 is a header part, and 16 is a bottomed cylindrical body.

Claims (4)

[Claims] [Claim 1] Multiple refrigerant paths (2) of heat exchanger (1)
, (2)... is a refrigerant distributor for distributing refrigerant to..., which comprises a pair of plate members (4), (4) mutually bonded to form a roll bond body (3). , between the plate-like members (4), each of the refrigerant paths (2),
(2)... are connected to the inlet portions (2a), (2a)... of the branch pipe sections (5), (5)..., and the branch pipe sections (5),
(5) A refrigerant distributor characterized in that a refrigerant distributor (6) is formed to distribute refrigerant to... 2. Between the plate members (4), (4),
The refrigerant distributor according to claim 1, further comprising U-shaped connecting pipe portions (14), (14), etc. provided in the middle of each of the refrigerant paths (2), (2), etc. 3. Another plate member (4) is bonded to the roll bond body (3), and between the roll bond body (3) and the plate member (4), the The outlet part (2b), (2b) of each refrigerant path (2), (2)...
3. The refrigerant distributor according to claim 1, further comprising a header portion (15) connected to the refrigerant distributor. 4. A bottomed cylindrical body (16) is constructed by joining the longitudinal ends (3a), (3a) of the roll bond body (3) and covering the bottom, and forming a bottomed cylindrical body (16). Body (1
6) The refrigerant distributor according to claim 1 or 2, characterized in that the inside thereof is a header portion (15).