JPH03170755A - Laminated type heat exchanger - Google Patents

Abstract

PURPOSE:To improve heat exchanger effectiveness by providing one of an end plate with a communicating means through which one end of a refrigerant path communicates in series with one end of a central tank group communicating with each other in series. CONSTITUTION:The refrigerant paths of two passes in which a refrigerant is moved in U-shaped paths 36 and central tank groups 103, 203, 303 are constituted among tank groups 101, 201, 301 and tank groups 102, 202, 302 in first to third heat-exchanging element groups 100, 200, 300. The tank groups 102, 202 and the tank groups 201, 301 communicates in tank sections, with which the refrigerant paths of two paths are brought into contact, in the refrigerant paths of two paths formed to the first or third heat-exchanging element groups 100, 200, 300 respectively, thus organizing the refrigerant paths of six paths in total. The refrigerant paths of six paths communicates with one ends of the central tank groups 103, 203, 303 in series through openings 40, 42 shaped to one end plate 12A in the tank group 101 on one end side of the refrigerant paths of six paths and a cover 44 for communication. Accordingly, heat exchanger effectiveness is improved.

Description

Detailed Description of the Invention (Industrial Application Field) This invention relates to a stacked heat exchanger used in a vehicle air conditioner, and in particular, a stacked heat exchanger that has a pair of tanks on one side and communicates heat through a U-shaped passage. The present invention relates to a stacked heat exchanger formed by stacking a plurality of exchange elements and corrugated fins.

(Prior Art) In recent years, as vehicles have become larger, this type of laminated heat exchanger has also tended to become larger. When increasing the size of a heat exchanger, the conventional so-called two-bus refrigerant passage configuration exhibits significant refrigerant drift and has a poor heat exchange efficiency, making it impractical. Therefore, refrigerant passages with a large number of refrigerant passages, such as 4-bus, 6-pass, 8-bus, etc., have been constructed (see, for example, Japanese Utility Model Application Publication No. 78 of 1979/1983).

(Problems to be Solved by the Invention) However, when constructing a refrigerant passage with four or more passes, the refrigerant inlet pipe and outlet pipe must be provided on opposite sides. Therefore, the inlet/outlet pipe and the expansion valve connected thereto are placed within the ventilation path, which creates ventilation resistance and reduces the cooling capacity. SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a stacked heat exchanger in which four or more buses of refrigerant passages are arranged and inlet/outlet vibes are arranged side by side on one side.

(Means for Solving the Problems) In order to achieve the above object, a stacked heat exchanger according to the present invention includes a pair of tanks, a U-shaped passage communicating them, and a U-shaped passage provided between the pair of tanks. A heat exchanger in which heat exchange elements with independent central tanks and corrugated fins are alternately stacked, end plates are arranged at both ends in the stacking direction, and the tanks of adjacent heat exchange elements are communicated as appropriate. A plurality of element groups are provided, and a refrigerant passage having an outbound path and a return path is constructed between one tank group and the other tank group of each heat exchange element group, and a central tank group.
One of a pair of adjacent tank groups of each heat exchange element group is communicated to form each refrigerant passage in series, and one end of the serial refrigerant passage is communicated with one end of the central tank group communicated in series. A communication means is provided on one of the end plates.

Further, another stacked heat exchanger according to the present invention includes a heat exchange element having a pair of tanks, a U-shaped passage communicating them, and a pipe communication section provided between the pair of tanks, and a corrugated heat exchange element. A plurality of heat exchange element groups are provided in which fins are alternately stacked and end plates are arranged at both ends in the stacking direction, and the tanks of adjacent heat exchange elements are appropriately connected, and one side of each heat exchange element group is provided. A refrigerant passage having an outgoing path and an incoming path is formed between one tank group and the other tank group, and a vibe passage is configured in the center, and one of the adjacent pair of tank groups of each heat exchange element group is communicated with each refrigerant The passages are arranged in series, an inlet/outlet pipe is disposed in the central vibe passage, and a communication means for communicating one end of the serial refrigerant passage with one end of the inlet/outlet pipe is provided on one of the end plates. There is a certain thing.

(Function) Therefore, in the invention according to claim 1, by alternately stacking heat exchange elements and fins and dividing the stacked heat exchange elements into heat exchange element groups of multiple stages, , 2 passes for each heat exchange element group (
The refrigerant passages for the outbound and return trips are arranged, and by connecting them in series, 4-bus, 6-bath, 8-bus, and other multi-pass refrigerant passages corresponding to twice the number of heat exchange element groups can be constructed. The inlet and outlet pipes can be arranged in parallel on one side by communicating this one end with the series center tank group via a communication means temporarily provided at one end.

In addition, in the invention according to claim 2, the central tank group described above is replaced with an inlet/outlet pipe, and one end of the serial refrigerant passage and one end of the inlet/outlet pipe are temporarily provided at one end. By communicating through the communication means, it has the same effect as the above.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 shows a 6-bath stacked heat exchanger (hereinafter referred to as "heat exchanger").
Say. ) is shown, and the heat exchanger includes a heat exchanger body 2, an inlet pipe (or outlet vibe) 4 that supplies refrigerant from the side of the heat exchanger body 2, and a refrigerant after heat exchange. Outlet pipe (or inlet pipe) for discharging 6
These are integrally brazed and assembled in the furnace.

The heat exchanger main body 2 is constructed by alternately stacking heat exchange elements 8 and corrugated fins 1O, and arranging end plates 12A and 12B at both ends in the stacking direction.

As shown in detail in FIGS. 2 and 3, each heat exchange element 8 is constructed by joining two blades 20 and 20 facing each other. This command play} 20 is bulged at the bottom as shown in the figure and has a groove 2.
2, 23, and 24 are formed, and a protrusion 25 extends upward from near the central groove 23, and a groove 26 that communicates with the grooves 22, 24 on both sides is formed at the periphery of the protrusion 25. The heat exchange element 8 is constructed by joining two of these, and inside the heat exchange element 8 there are grooves 22.2 facing each other.
Tanks 30 and 32 are formed from each groove 23, a central tank 34 is formed from each groove 23, and a U-shaped passage 36 is formed from each groove 26. Here, the tank 30.32 is the U-shaped passage 36.
while the central tank 34 is independent. In addition, these tanks 30, 32, the central tank 34
Openings 30A, 32A, and 34A are formed in the center of each of the tanks, so that the tanks that are in contact with each other between adjacent heat exchange elements communicate with each other.

In this heat exchanger main body 2, the above-mentioned heat exchange elements 8 are arranged as shown in FIG. The heat exchange element groups 100, 200, and 300 are configured. This first
, second and third heat exchange element groups 100, 200.3
00 is the tank group 101, 201, 301 (guarded by each tank 32) and the tank group 102, 202.
302 (consisting of each tank 30. 34). The first, second, and third heat exchange element groups 10
The two-pass refrigerant passages each of 0,200,300 have are:
In the tank portions where they come into contact, the tank groups 102 and 202 and the tank groups 201 and 301 are communicated with each other to form a total of six refrigerant paths. The refrigerant passages of these six buses connect the tank group 101 at one end to the center tank group 103, 203, 303 connected in series through an opening 40.42 provided in one end plate 12A and a lid 44 for communication. is connected to one end of the The lid 44 used here is formed into a bottomed box as shown in FIG. 4, and its opening side is in contact with the end plate 12A. On the other hand, the tank group 302 at the other end of the 6-pass refrigerant path is communicated with the refrigerant outlet pipe 6. In addition, the central tank group 10 in series
The other end of 3,203,303 is communicated with the refrigerant inlet vibe 4. Note that the tank groups 101 and 201 and the tank groups 202 and 302 are constructed so that they do not communicate with each other by using, for example, a restraint-shaped brake 20A that does not have an opening in the groove 24. Furthermore, the aforementioned inlet pipe 4 and outlet vibrator 6 are both fitted into the refrigerant artificial hole 46 and the refrigerant outlet hole 48 of the other end plate 12B, and are arranged side by side, and the end plate 12B is arranged side by side with the other end plate 12B. The right opening 32A of the abutting tank 32 is closed. On the other hand, the aforementioned end plate 12A has the left opening 30. of the tank 30 in contact therewith. It's blocking A.

As shown in FIG.
The refrigerant flowing into the tanks 10 of the first heat exchange element group 100 via the lid 44
1, moves to the tank group 102 via the U-shaped passage 36, moves horizontally from there to the tank group 202 of the second heat exchange element group 200, and moves from the tank group 202 to the tank group 102 via the U-shaped passage 36. group 201, then horizontally to the tank group 301 of the third heat exchange element group 300, moves to the tank group 302 via the U-shaped passage 36, and is discharged from the outlet pipe 6 (or take the opposite route)
It has six refrigerant passages. Therefore, as described above, the first, second, and third heat exchange element groups 1 each have two refrigerant passages (outbound and return).
By connecting 00, 200, and 300 in series, a desired 6-pass refrigerant passage can be configured, and
By communicating one end side with the series central tank group 103, 203, 303 via the lid 44 provided on the end plate 12A, the inlet pipe 4 and the outlet pipe 6 can be arranged side by side on the same side. It is now possible to do so.

FIG. 6 shows a second embodiment comprising a six-bath heat exchanger, and will be described below. However, the same components as those described in the first embodiment described above are given the same numbers and the explanation thereof will be omitted, and only the different points will be explained below.

The difference between the heat exchanger shown in FIG. 6 and the first embodiment described above is that one end plate 12A used in the heat exchanger main body 2 is replaced with the end plate 12A shown in detail in FIG. It is located in place of plate 12c. In this end plate 12C, a groove 53 having an opening 50.51 and a groove 55 having no opening are bulged downward in the figure, and the opening surface of the groove 530 is closed by a lid 57 having a larger shape. It is designed to be able to be removed. The end plate 12C is arranged at the left end of the heat exchanger main body 2 as shown in FIG. It has a structure in which the tank group 101 of the heat exchange element group 100 and the series central tank group 103, 203, 303 are communicated with each other. Further, the groove portion 55 is configured to close the left opening 30A of the tank 30 in contact with the groove portion 55. Such a heat exchanger connects a central tank group 103, 203, 303 in series via an inlet pipe 4, as shown in FIG.
The refrigerant flowing into the groove 53 of the end plate 12C and the lid 57
It moves to the tank group 101 of the first heat exchange element group 100 via the communication path 60 formed between the U-shaped path 36
and from there horizontally to the tank group 202 of the second heat exchange element group 200;
From the tank group 202 to the tank group 20 via the U-shaped passage 36
1, then horizontally moves to the tank group 301 of the third heat exchange element group 300, moves to the tank group 302 via the U-shaped FIII 36, and is discharged from the outlet vibe 6 (or vice versa). The refrigerant path consists of 6 buses (following the route of 1). Therefore, similarly to the heat exchanger described in the first embodiment, each has two passes (outbound and return).
By connecting in series the first, second, and third heat exchange element groups 100, 200, and 300, each having a refrigerant passage, a desired 6-bus refrigerant passage is configured, and one end side of the refrigerant passage is configured. The central tank group 103 is connected in series through a communication path 60 between the groove 53 of the end plate 12c and the lid 57,
203 and 303, the inlet pipe 4 and the outlet pipe 6 can be arranged side by side on the same side. Next, an embodiment according to the invention set forth in claim 2 will be described.

FIG. 9 shows an example of a six-bath heat exchanger, which includes a heat exchanger main body 2, an inlet/outlet vibe 49 that supplies refrigerant from the side of the heat exchanger main body 2, It is equipped with an outlet pipe 4 for discharging the refrigerant after heat exchange, and these are integrally brazed and assembled in the furnace.

The heat exchanger main body 2 is constructed by alternately stacking heat exchange elements 50 and corrugated fins 10, and arranging end plates 12A and 12B at both ends in the stacking direction.

The molded plate 60 surrounding the heat exchange element 50 is
The structure is somewhat different from the shaped plate 20 used in the embodiment according to the invention described in claim 1 above. The difference is that the central groove 23 is shown in detail in FIG.
A substantially U-shaped notch 62 is formed in place of the groove 23 at a position corresponding to the groove 23, and other points are the same. The heat exchange element 50 is constructed by joining two such shaped plates 60, and inside the heat exchange element 50, the tanks 30.32 are connected to the opposing grooves 22.24, and the vibe passages 64 are connected to each other from the notches 62. 26 respectively constitute a U-shaped passage 36. Openings 30A and 32A are formed in the center of the tanks 30 and 32, so that the tanks that are in contact with each other between adjacent heat exchange elements communicate with each other.

The heat exchanger main body 2 configured with the above-mentioned heat exchange elements 50 has the heat exchange elements 50 arranged as shown in FIG. 9, and divided into three equal parts. , 3rd
The heat exchange element groups 100, 200, and 300 are configured. These first, second, and third heat exchange element groups 1
00, 200, 300 are the tank groups 101, 201
．． ．． 301 (consisting of each tank 32) and tank groups 102, 202, 302 (consisting of each tank 30), there are two paths (outward path and return path) in which the refrigerant moves within the U-shaped passage 36. A refrigerant passage and a pipe passage part 64 in the center
A certain vibrator passage 71, 72, 73 is constructed by laminating them in a groove shape. The first, second, and third heat exchange element groups 100, 200, and 300 each have two
In the refrigerant passages of the paths, the tank groups 102 and 202 and the tank groups 201 and 301 are connected to each other at the tank portions where they are in contact, forming a total of six refrigerant passages. On the other hand, the pipe passage? 1.72.73 and end plates 12A, 12B
The lead-in/out pipe 49 is fitted into the openings 42 and 46 and fixed therein. One end of this lead-in/out vibe 49 is communicated with the tank group 101 at one end of the above-mentioned 6-pass refrigerant passage via an opening 40.42 provided in one end plate 12A and a communication lid 44. There is.

The lid body 44 used here is the same as that used in the first embodiment according to the invention described in claim 1,
Its opening surface is in contact with the end plate 12A. On the other hand, the tank group 302 at the other end of the 6-pass refrigerant passage is communicated with the refrigerant outlet pipe 6. In addition, tank group 101 and 20l
One tank group 202 and 302 is structured so that there is no communication between them, for example by using a large plate 60A that does not form an opening in the groove 24. Further, the aforementioned outlet pipe 6 is fitted into the refrigerant outlet hole 48 formed in the other end plate 12B, and is arranged in parallel with the outlet/inlet pipe 49.
is blocking the right opening 32A of the tank 32 in contact with it. On the other hand, the aforementioned end plate 12A closes the left opening 30A of the tank 30 in contact therewith.

In the heat exchanger assembled as described above, as shown in FIG. tank group 10 via the U-shaped passage 36.
2 and from there a second group of heat exchange elements 200
horizontally move to the tank group 202 of
It moves to the tank group 201 via the U-shaped passage 36, then horizontally moves to the tank group 301 of the third heat exchange element group 300, moves to the tank group 302 via the U-shaped passage 36, and then connects the outlet pipe 6. A six-path refrigerant path is configured to discharge the refrigerant from (or follow the reverse route).

Therefore, by connecting in series the first, second, and third heat exchange element groups 100, 200, and 300 each having two buses (outbound and return) of refrigerant passages as described above,
A desired six-bus refrigerant passage can be configured, and one end of the refrigerant passage can be communicated with the outlet/inlet pipe 49 via the lid 44 provided on the end plate 12A.
and the lead-in/out pipe 49 can be arranged side by side on the same side.

(Effect of the invention) As described above, in the invention according to claim 1,
By stacking heat exchange elements and fins alternately to configure an appropriate number of stages of heat exchange element groups, and connecting the refrigerant passages of each of the two buses (outbound and return trips) in series, two of the heat exchange element groups can be stacked. It is possible to construct heat exchangers with double the number of refrigerant passages, and one end of the refrigerant passages is connected to the central tank group via a temporarily provided communication means.
The refrigerant inlet and outlet pipes can be arranged side by side on the same side. Therefore, depending on the desired size of the heat exchanger, 4-pass, 6-bath, or other multi-pass refrigerant passages can be constructed to improve the heat exchange efficiency, and the inlet and outlet pipes can be arranged in parallel. The installation space can be reduced.

Furthermore, according to the invention set forth in claim 2, the structure similar to that of the invention set forth in claim 1 is achieved by replacing the central tank group described above with a configuration in which the lead-in/output pipes are fitted into the main body and fixed. You can get the effect.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a laminated heat exchanger according to a first embodiment of the invention described in claim 1, as seen from the inlet/outlet pipe side, and FIG. 2 is a sectional view of the same laminated heat exchanger, and Figure 3 is a perspective view of a molded plate used in the above laminated heat exchanger, Figure 4 is a perspective view of the same laminated heat exchanger seen from the opposite side of the inlet/outlet pipe, and Figure 5 is the same laminated heat exchanger as above. A schematic diagram showing the flow of refrigerant in the exchanger, FIG. 6 is a cross-sectional view of the laminated heat exchanger in the second embodiment, and FIG. 7 is a perspective view of the end plates etc. used in the laminated heat exchanger described above. , FIG. 8 is a schematic diagram showing the flow of refrigerant in the laminated heat exchanger described above, and FIG.
10 is a perspective view of a plate used in the above laminated heat exchanger, and FIG. 11 is a sectional view of the laminated heat exchanger according to the embodiment of the invention described in 1. FIG. 3 is a schematic diagram showing the flow of refrigerant in the container. 2... Heat exchanger body, 4... Inlet pipe, 6...
Outlet vibe, 8,50...heat exchange element, IO.
．． ．． Finn, 12A. 12B, 12C... end plate, 44
．． 57... Lid body, 49... Input/output vibe, 71, 72, 73... Pipe passage, 100. 200, 300... First, second, third heat exchange element groups, 103, 203, 303 Central tank group. Patent applicant Diesel Equipment Co., Ltd.

Claims (1)

[Claims] 1. A heat exchange element having a pair of tanks, a U-shaped passage communicating them, and an independent central tank provided between the pair of tanks, and corrugated fins are alternately laminated. A plurality of heat exchange element groups are provided in which end plates are arranged at both ends in the stacking direction, and the tanks of adjacent heat exchange elements are appropriately connected, so that one tank group of each heat exchange element group is connected to the other tank group. A central tank group is constructed with a refrigerant passage having an outgoing path and a return path between the tank group, and one of the adjacent pair of tank groups of each heat exchange element group is communicated with each other so that each refrigerant passage is connected in series. A stacked heat exchanger, characterized in that one of the end plates is provided with communication means for communicating between one end of the serial refrigerant passage and one end of the central tank group connected in series. 2. A heat exchange element having a pair of tanks, a U-shaped passage communicating them, and a pipe communication section provided between the pair of tanks, and corrugated fins are alternately stacked at both ends in the stacking direction. A plurality of heat exchange element groups are provided in which the tanks of adjacent heat exchange elements are appropriately connected, and an outgoing route is provided between one tank group and the other tank group of each heat exchange element group. A refrigerant passage having a return passage and a return passage, and a pipe passage in the center are configured, and one of a pair of adjacent tank groups of each heat exchange element group is communicated to form each refrigerant passage in series, and the refrigerant passage is led out to the central pipe passage. A laminated heat exchanger characterized in that an inlet pipe is disposed therein, and communication means for communicating one end of the serial refrigerant passage and one end of the outlet/outlet pipe is provided on one of the end plates.