JPH11325755A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify piping structure, to reduce the number of processes for fitting pipes, and to effectively utilize space by jointing, by brazing, a block body comprising an inlet and an outlet for a heating medium to one of a pair of header pipes where a heat exchanger is erected as one body. SOLUTION: A heat exchanger 1 comprises a pair of header pipes 2a, a plurality of heat exchangers 3 erected parallel between them and a heat exchanger fin 4 is joined by brazing while inserted between the heat exchangers 3. Here, a block body 10 comprising an inlet 11 and an outlet 12 for a heating medium is jointed by brazing, to one header pipe 2a as one body. At the block body 10, a recessed and arc joint surface 16 contacting the outside surface of the header pipe 2a is formed. On the side opposite to the joint surface 16 of the block body 10, a connector to which each end of supply pipe and discharge pipe of the heating medium is connected is fitted with a fixing bolt. Thus, the entire of constituting parts is brazed for jointing collectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger, and more specifically, a heat exchanger tube is erected between a pair of header pipes to simplify a piping structure between a header pipe and an inlet and an outlet of a heat medium. The present invention relates to a heat exchanger.

[0002]

2. Description of the Related Art In general, as a heat exchanger used for an air conditioner such as a car or a house, a parallel flow type having a plurality of heat exchange tubes installed in parallel between a pair of header pipes is known. ing. An example of this parallel flow type heat exchanger will be described with reference to FIG.

The heat exchanger a has a plurality of heat exchange tubes c laid parallel to each other between a pair of header pipes b. Heat exchange fins such as corrugated fins are provided between the heat exchange tubes c. d is interposed and brazed integrally with the heat exchange tube c. The header pipe b is formed into a substantially cylindrical shape by, for example, roll-forming an extruded shape member or plate made of aluminum, and cap members f are fixed to upper and lower end portions of both header pipes b. The heat exchange tube c is formed in a hollow flat shape by, for example, an extruded member made of aluminum. Inside the heat exchange tube c, a flow path (not shown) of a heat medium penetrating in the longitudinal direction is formed. I have. Both ends in the longitudinal direction of the heat exchange tube c formed in this manner are brazed while being inserted into a plurality of slits (not shown) provided on opposite side surfaces of both header pipes b.

In this case, generally, the upper side of one header pipe b (the left side in FIG. 5) has an inlet g for the heat medium.
A heat medium outlet h is provided on the lower side surface of the other header pipe b (right side in FIG. 5). In addition, as shown by the imaginary line in FIG. 5, the arrangement positions of the inlet g and the outlet h are, for example, the inlet g is provided on the upper end surface of one header pipe b, and the outlet h is provided on the other header pipe. A structure provided on the lower end surface of b is also known.

In the heat exchanger a configured as described above, the supply pipe for the heat medium is connected to the inlet port g, and the discharge pipe for the heat medium is connected to the outlet port h. By supplying a heat medium into the heat exchanger and flowing the heat medium through the heat exchanger a, the heat medium is used as a heat exchanger.

[0006]

However, in the case of the conventional heat exchanger a, since the inflow port g and the outflow port h are provided at separate positions, the piping space becomes large, and the heat exchanger a is mounted. At this time, a space much larger than the size of the heat exchanger a is required. Therefore, when the heat exchanger is installed in a place where the mounting space is limited, such as an air conditioner of an automobile, it is necessary to make the heat exchanger small accordingly, and there is a problem that the heat exchange rate is reduced. In addition, since the piping structure becomes complicated, the number of parts and the number of mounting steps increase,
There is also a problem that installation becomes troublesome and manufacturing cost increases.

Further, it is difficult to flexibly change the positions of the inflow port g and the outflow port h, and accordingly, there is a problem that the mounting position and the directionality of the heat exchanger a are also limited. Furthermore, since the pipe forming the inflow port g and the outflow port h is joined to the header pipe b by brazing, there is a problem that the mounting strength of the inflow port g and the outflow port h is uneasy.

The present invention has been made in view of the above circumstances, and aims at simplifying the piping structure and reducing the number of piping installation steps.
It is another object of the present invention to provide a heat exchanger capable of effectively utilizing a space.

[0009]

In order to achieve the above object, the present invention is configured as follows. The invention according to claim 1 is a heat exchanger including a pair of header pipes and a heat exchange pipe provided between the header pipes, wherein one of the header pipes has an inlet and an outlet for a heat medium. The blocks are brazed together,
It is characterized by the following.

In this case, it is preferable that at least one of the inflow port and the outflow port of the block is connected to the header pipe. More preferably, one of the inflow port and the outflow port of the block body is connected to the header pipe, and the other is connected to the header pipe via a pipe (claim 3). Further, it is preferable that the header pipe is formed in a substantially cylindrical shape, and that the block body is formed with a concave joining surface that comes into contact with the outer surface of the header pipe.

According to the first aspect of the invention, the block having the heat medium inlet and outlet is brazed to one of the header pipes to braze and join the entire components together. be able to. Further, the heat medium can be connected to the pipes on the inflow side and the outflow side at the same time via the block body, the pipes can be simplified, and the space for the pipes can be reduced.

In this case, at least one of the inflow port and the outflow port of the block body is communicated with the header pipe, so that at least one of the pipes connecting the inflow port or the outflow port and the header pipe becomes unnecessary, and the connection is not required. It becomes easy (claim 2). In addition, by connecting one of the inflow port and the outflow port of the block body to the header pipe and connecting the other to the header pipe via a pipe, the shape of the block body is reduced in addition to the case of claim 2. (Claim 3). Furthermore, by forming the header pipe in a substantially cylindrical shape and forming a concave joining surface in contact with the outer surface of the header pipe on the block body, the degree of freedom of the mounting position of the block body is improved, and the joining area is reduced. Since it can be widely used, it is possible to improve the joining strength by brazing the inlet and the outlet (claim 4).

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the heat exchanger according to the present invention will be described below in detail with reference to the accompanying drawings. Here, a case where the present invention is applied to a parallel flow type heat exchanger will be described. FIG. 1 is a schematic front view showing an example of a heat exchanger according to the present invention, and FIG. 2 is a schematic cross-sectional perspective view showing part A of FIG. 1 in an enlarged manner.

The heat exchanger 1 comprises a pair of header pipes 2
a, 2b, a plurality of heat exchange tubes 3 installed in parallel between the header pipes 2a, 2b, and heat exchange fins such as corrugates interposed between the heat exchange tubes 3 and joined by brazing. A fin 4 is provided, and a block body 10 having a heat medium inlet 11 and a heat outlet 12 is integrally brazed to one header pipe 2a.

The header pipes 2a and 2b are formed in a substantially cylindrical shape by, for example, an extruded member made of aluminum.
Cap members 5 are attached and fixed to upper and lower ends of both header pipes 2a and 2b. The header pipe 2a
The outlet 1 of the block body 10
A communication hole (not shown) for communicating with the second member 2 is formed.

The heat exchange tube 3 is formed of, for example, an aluminum extruded shape and is formed in a hollow flat shape, for example, and has therein a plurality of flow paths (parts) of a heat medium penetrating in the longitudinal direction. (Not shown). Both ends in the longitudinal direction of the heat exchange tube 3 formed in this way are provided with slits (not shown) provided in parallel and in multiple stages at appropriate intervals on opposing side surfaces of the header pipes 2a and 2b. Inserted and secured by brazing.

The heat exchange fins, ie, corrugated fins 4, are formed in a continuous wave shape by bending an aluminum plate, for example, and are interposed between the heat exchange tubes 3 and brazed. The uppermost heat exchange tube 3
The corrugated fins 4 are also brazed on the upper side of the lower side and the lower side of the lowermost heat exchange tube. In this case, a side plate 6 made of, for example, an aluminum plate is brazed to protect the upper and lower corrugated fins 4 from above and below the lowermost corrugated fin 4. ing.

The block body 10 is formed of, for example, an extruded shape member made of aluminum, and is integrally brazed to the lower side surface of one of the header pipes 2a. Also,
Inflow port 11 or outflow port 12 provided in block body 10
One (outlet 12 in the drawing) is connected to the header pipe 2a, and the other
Is connected to the upper side surface of the header pipe 2a via a pipe 15 connected to a connection port 14 opened at the upper end of the block body 10 through an inflow passage 11a provided in the block body 10.

The inflow port 11 may be connected to the header pipe 2a, and the outflow port 12 may be connected to the header pipe 2a via a pipe 15. In this case, the block body 10 is brazed to the upper side surface of the header pipe 2a, and the other end of the pipe 15 connected to the outlet 12 is connected to the header pipe 2a.
Is preferably connected to the lower side surface.

The block body 10 is formed with a joint surface 16 having a concave shape and a substantially circular cross section which is in contact with the outer surface of the header pipe 2a.
And a hole (not shown) connected to the hole. The joint surface 16 and the header pipe 2 are set so that the hole (not shown) and the communication hole formed in the header pipe 2a coincide with each other.
a is brazed together. By forming in this manner, the mounting position of the block body 10 can be freely changed as shown in FIG. 4 only by changing the position where the communication hole is formed. The joining surface 16 is the header pipe 2
Since the contact is made along the outer surface of a, the contact area increases,
The joining strength by brazing can be improved.

The inlet 11 of the block body 10
The supply pipe 2 for the heat medium is provided on the surface on which the outlet 12 is provided.
1 is connected to the inlet 11 and a connector 20 for connecting the discharge pipe 22 for the heat medium to the outlet 12 is fixed by fixing means, for example, fixing bolts 23 (see FIG. 3).
In this case, the fixing bolt 23 passes through the through hole 24 formed in the connector 20 and is screwed to the screw hole 13 formed in the block body 10. In addition, the block body 1
It is preferable to interpose a sealing material such as an O-ring 30 for maintaining airtightness or liquid tightness between the connector 0 and the connector 20.

Next, the heat exchanger 1 constructed as described above is used.
Will be described below. First, the header pipes 2a, 2b, the heat exchange pipe 3, and the corrugated fin 4
And fix it with a jig. Next, the joining surface 16 of the block body 10 is aligned so that the communication hole provided in the header pipe 2a and the hole provided in the joining surface 16 coincide with each other, and welded so as not to shift. Temporarily attach. Also, a pipe 15 is connected to the connection port 14 on the inflow side of the block body 10.
And the other end of the pipe 15 is connected to the header pipe 2a.
To the top end of the In this state, the heat exchanger 1 is formed by heating to about 600 ° C. in a heating means, for example, a furnace, and brazing and joining the assembled components together.

In the above brazing, it is preferable to apply a mixture of a brazing material and a flux powder. The flux powder includes a fluoride-based flux and a chloride-based flux, and any of them may be used. However, it is preferable to use a non-corrosive fluoride-based flux. As the fluoride-based flux, it is possible to use, for example, aluminum fluoride, a fluoride of an alkali metal or an alkaline earth metal, a composite fluoride thereof, or a flux containing these as a main component.

The connector 20 connected to one end of the heat medium supply pipe 21 and one end of the heat medium supply pipe 22 is brought into contact with the block body 10 of the heat exchanger 1 formed as described above via a sealing material 30 to fix the fixing bolt. 23 is screwed and fixed to the screw hole 13 of the block body 10 through the through hole 24 of the connector 20.

In the above embodiment, the block 10
Although one of the inflow ports 11 and the outflow ports 12 provided in the apparatus has been described, for example, the outflow port 12 is directly connected to the header pipe 2a, and the other, for example, the inflow port 11 is connected to the header pipe 2a via the pipe 15 has been described. However, the present invention is not necessarily limited to such a structure. For example, the block body 10 may be formed to be elongated along the height of the header pipe 2a or 2b, and the inflow port 11 and the outflow port 12 may be directly connected to the header pipe 2a or 2b, respectively.

In the above embodiment, the case where the heat exchanger according to the present invention is applied to a parallel flow type heat exchanger in which header pipes are arranged vertically is described. It is needless to say that the present invention can be applied to the parallel flow type heat exchanger provided in the above.

[0027]

As described above, according to the heat exchanger of the present invention, the following excellent effects can be obtained.

(1) According to the first aspect of the invention, the block having the heat medium inlet and outlet is brazed to one of the header pipes. Can be joined. Further, the heat medium can be connected to the pipes on the inflow side and the outflow side at the same time via the block body, the pipes can be simplified, and the space for the pipes can be reduced.

Therefore, the piping structure can be simplified and the number of man-hours for mounting the pipe can be reduced, so that the manufacturing cost can be reduced, and the mounting position and the mounting accuracy of the pipe can be improved. . Furthermore, even if the installation location is a small space or the installation position of the piping is limited, the heat exchanger can be easily installed,
Effective use of space can be achieved.

(2) According to the second aspect of the present invention, at least one of the inflow port and the outflow port of the block body communicates with the header pipe, so that at least one of the pipes connecting the inflow port or the outflow port and the header pipe is connected. One can be unnecessary and the connection can be facilitated.

(3) According to the third aspect of the present invention, either the inflow port or the outflow port of the block body is connected to the header pipe, and the other is connected to the header pipe via a pipe. In addition to (2), the shape of the block body can be reduced, and the entire heat exchanger can be further reduced in size.

(4) According to the fourth aspect of the present invention, since the header pipe is formed in a substantially cylindrical shape, and the block body is formed with a concave joining surface in contact with the outer surface of the header pipe, the mounting of the block body is performed. The degree of freedom of position can be improved. Also, because the bonding area can be widened,
It is possible to improve the bonding strength by brazing.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an example of a heat exchanger according to the present invention.

FIG. 2 is a schematic sectional perspective view showing a portion A of FIG. 1 in an enlarged manner.

FIG. 3 is a schematic side view showing, on an enlarged scale, a state in which a supply pipe and a discharge pipe for a heat medium are connected to a block body according to the present invention via a connector.

FIG. 4 is an enlarged sectional view of a main part showing that a mounting position of a block body can be changed.

FIG. 5 is a schematic front view showing an example of a conventional heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchanger 2a, 2b Header pipe 3 Heat exchange tube 10 Block body 11 Inlet 12 Outlet 12a Communication path 15 Pipe 16 Joint surface

Claims (4)

[Claims] 1. A heat exchanger comprising a pair of header pipes and a heat exchange pipe provided between the header pipes, wherein one of the header pipes has a block having an inlet and an outlet for a heat medium. A heat exchanger characterized by being integrally brazed and joined. 2. The heat exchanger according to claim 1, wherein at least one of the inflow port and the outflow port of the block body communicates with the header pipe. 3. The heat exchanger according to claim 1, wherein one of an inlet and an outlet of the block body communicates with the header pipe, and the other is connected to the header pipe via a pipe. A heat exchanger characterized by the following. 4. The heat exchanger according to claim 1, wherein the header pipe is formed in a substantially cylindrical shape, and the block body is formed with a concave joining surface that contacts an outer surface of the header pipe. A heat exchanger.