JPH064222Y2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an efficient heat exchanger with little pressure loss.

[Conventional technology]

The heat exchanger 10 according to the conventional example is configured by disposing a coiled pipe 14 inside a cylindrical body 13 having inlets and outlets 11 and 12 formed at both ends as shown in FIG. A heat medium or a refrigerant is caused to flow through the pipe 14, and the inlets / outlets 11, 1
The fluid flowing through 2 (hereinafter referred to as the fluid to be treated) was heated or cooled.

Further, Japanese Utility Model Laid-Open No. 61-59111 has proposed a heat exchanger for heating a vehicle in which radial fins are provided inside the inner pipe and radial fins are provided outside the inner pipe.

[Problems to be solved by the invention]

However, in the heat exchanger 10 according to the conventional example, the heat efficiency is improved by increasing the length of the pipe 14 through which the heat medium or the refrigerant passes. There is a problem that the pressure loss increases.

Further, the fluid to be processed flowing through the inside of the cylindrical body 13 has a relatively low flow velocity, and not all the fluid flows in contact with the pipe 14 substantially uniformly. Although the gradient is large, the temperature gradient of the entire fluid to be treated is small, and therefore the thermal efficiency is low. Moreover, since the pipe 14 is spirally wound, there is a problem that the apparatus becomes large as a whole.

Furthermore, in the heat exchanger according to the conventional example, a part of the fluid passing through the inlets and outlets 11 and 12 and passing through the inside of the tubular body 13 may remain in the corner of the tubular body, and the fluid to be treated is temporally different. There has been a problem that it cannot be used in the case of liquids whose components change or deteriorate with the passage of time.

Further, in the vehicle heating heat exchanger described in Japanese Utility Model Laid-Open No. 61-59111, since the fins outside the inner pipe do not completely partition the outer pipe from the inner pipe, the fluid flowing through the outer pipe When the liquid is a liquid and the flow rate is low, there is a problem in that it may flow unevenly in the lower part of the outer pipe and the fins arranged outside the inner pipe may not be cooled.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a heat exchanger in which the apparatus as a whole is compact and highly efficient, and the pressure loss is low and all the fluids to be treated are uniformly heated. And

[Means for solving problems]

The heat exchanger according to the present invention, which meets the above-mentioned object, is provided with connection ports communicating with the inner pipe and the outer pipe at both ends of the double pipe. In the heat exchanger described above, fins that radially divide the fluid passage parallel to the traveling direction are radially provided inside the inner pipe, and outside the inner pipe and the outer pipe. Fins that are arranged over the inside and partition the fluid passage formed by the inner pipe and the outer pipe into small sections parallel to the traveling direction are provided, and further, the double pipe is formed in a U shape, and the inner pipe is formed. And the connection ports connected to the outer pipe are provided in the same direction.

Here, the inner pipe, the outer pipe, and the fins are preferably made of a titanium material when the object to be treated is a corrosive liquid, but if the material has good thermal conductivity (for example, copper, aluminum, etc.) , Anything is applicable. Further, it is preferable that the fins arranged on the inner pipe are joined to the inner pipe by welding or brazing.

[Action]

The heat exchanger according to the present invention is composed of a double tube including an inner tube and an outer tube. The inner tube is radially provided with fins and the external fins are provided to partition fluid passages in parallel with the traveling direction. Has been. Therefore, the contact area with the fluid passing between the inner pipe and the outer pipe is increased, and the contact area with the fluid passing through the inner pipe is also increased. As a result, the fluid flowing through the inner pipe and the outer portion of the inner pipe are increased. The overall heat transfer efficiency of the fluid flowing through it will be improved.

In addition, since the inner pipe and the liquid passing through the outside of the inner pipe are partitioned by the fins, the distance between the fluid and the member that conducts heat becomes small, so that the average temperature gradient is improved and the efficiency is improved. Have.

Further, since the fins attached to the inner pipe are attached in parallel to the traveling direction of the fluid, the resistance to the fluid is small, and the fluid passing through the inside and the outside of the inner pipe does not remain in a part.

Even if the flow rate of the liquid flowing between the inner pipe and the outer pipe is small, the liquid is divided by the fins, so that the liquid hardly flows unevenly in one of the outer pipes. Is said to have good heat exchange efficiency.

Furthermore, since the double pipe is U-shaped and the connection ports are formed in the same direction, the connection is easy, and the double pipe is surrounded by a heat insulating material and stored in a box body. Therefore, the heat exchanger can be formed compactly.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.

Here, FIG. 1 is a partially cutaway plan view of a heat exchanger according to an embodiment of the present invention, and FIG. 2 is an arrow AA in FIG.
A sectional view and FIG. 3 are sectional views of the double pipe used in the above embodiment.

As shown in FIGS. 1 and 2, a heat exchanger 15 according to an embodiment of the present invention includes a double pipe 16 that forms a main body of the heat exchanger.
The heat insulating material 17 is arranged around the double pipe 16 and a box 18 surrounding the heat insulating material 17.

The double pipe 16 is made of a titanium material and is bent and formed in a U-shape. As shown in FIG. 3, the inner pipe 19, the outer pipe 20 and the fins 21 and 22 arranged inside and outside the inner pipe 19 are used. Has become. The fins 21 and 22 are made of a titanium material and are radially arranged. The fins 21 partition the inner tube 19 in the direction of fluid flow, and the central portions thereof are fixed.
Further, the fins 22 are in contact with the inner pipe 19 and the outer pipe 20 at their ends so as to partition the fluid flowing outside the inner pipe 19 in the traveling direction. The fins 22 arranged on the outer side of the inner tube 19 are entirely bent and formed integrally to have a petal shape. The fins 22 inserted to the outside can be extremely easily formed and processed, and the axial center of the inner pipe 19 and the axial center of the outer pipe can be aligned with each other.

Inner and outer connection ports 23, 24 through which the fluid to be treated flows are attached to one end of the double pipe 16, but the other one of the connection ports also has the same structure, so only one will be described. The other part is given the same reference numeral, and detailed description thereof is omitted.

The T-shaped pipe 25 is welded to the end of the outer pipe 20, and the connection port 23 for flowing the heat medium or the refrigerant attached to the end of the outer pipe 20 is removed to the T-shaped 26 of the T-pipe 25. A flare joint 27, which is an example of a universal joint, is screwed and configured.

On the other hand, the inner pipe 19 projects from the outer pipe 20, and a connection port 24 for flowing the fluid to be treated is formed at an end portion thereof. The connection port 24 is formed on the inner pipe 19 made of titanium material.
A short pipe 29 made of titanium material in which a short pipe 28 made of a copper pipe has been diffusion-welded in advance is welded and configured, and other connecting pipes for flowing a fluid to be treated can be easily welded to the short pipe 28 made of a copper pipe. It has a structure that can be brazed.

A heat insulating material 17 made of glass wool, rock wool or the like is arranged around the double tube 16 to prevent heat from escaping from the outer tube 20. This heat insulating material 1
A box body 18 is arranged outside the device 7 for impact from the outside or for convenience of handling. The double pipe 16 is attached to an appropriate position of the box 18 via a supporting member, and the attachment position is held.

When this heat exchanger 15 is used, first, each flare joint 27 is connected with a refrigerant (or heat medium) pipe, and then the inner pipe 19 is connected.
A fluid to be treated (for example, water, seawater, etc.) is connected to each of the connection ports 24 connected to, and the fluid to be treated and the refrigerant are used so as to face each other.

[Effect of device]

According to the present invention, in addition to the inner side of the inner pipe, fins are provided on the outer side of the inner pipe and the inner side of the outer pipe in parallel with the traveling direction of the fluid passage. Even if the flow rate of the fluid is reduced, the flowing fluid separates the passages separated by the fins. Therefore, even when the contact area between the fluid passing through each passage and the fin is secured and the flow rate is small and there is a space above, heat exchange between the fluids can be efficiently performed.

Further, since the fins for partitioning the inner pipe and the outer pipe are provided in parallel with the fluid passage, it is possible to perform highly efficient heat exchange with a small pressure loss.

Also, since the fluid flowing inside does not remain in part,
It is possible to efficiently perform heat exchange of all fluids.

Since the double pipe has a U-shape and the connection ports of the inner pipe and the outer pipe are provided in the same direction, the connection is facilitated, and the double pipe is surrounded by the heat insulating material. Since it is housed in a box, a more compact heat exchanger can be formed.

[Brief description of drawings]

1 is a partially cutaway plan view of a heat exchanger according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA in FIG.
FIG. 3 is a sectional view of the double pipe used in the above embodiment, and FIG. 4 is a partially cutaway side view of the heat exchanger according to the conventional example. [Explanation of symbols] 15 ... Heat exchanger, 16 ... Double pipe, 17 ... Heat insulating material,
18 ... Box, 19 ... Inner tube, 20 ... Outer tube, 21, 2
2 ... Fins

Claims (1)

[Scope of utility model registration request] 1. A heat exchanger in which a connection port communicating with an inner pipe and an outer pipe is provided at both ends of a double pipe, the outer pipe is surrounded by a heat insulating material, and the outside is housed in a box body.
Fins that radially divide the fluid passage parallel to the traveling direction are radially provided inside the inner pipe, and the fins are arranged outside the inner pipe and inside the outer pipe. Fins are provided for partitioning the fluid passage formed by the outer pipe and the outer pipe in parallel to the traveling direction, and further, the double pipe is formed in a U shape and connected to the inner pipe and the outer pipe, respectively. The heat exchanger characterized in that the connection ports of are provided in the same direction.