JP2581794Y2 - Heat exchanger - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger suitable for heating or cooling various liquids.

[0002]

2. Description of the Related Art There is a heat exchanger as a means for heating or cooling various liquids contained in a liquid tank. A conventional general heat exchanger includes a metal tube in a liquid tank. The liquid in the liquid tank has been heated or cooled by heat exchange by supplying various heat mediums or refrigerants in a fixed pipe in a shape of a letter or a serpentine pipe, and supplying various heat mediums or refrigerants into the metal pipe.

[0003] However, in the above-mentioned conventional heat exchanger, it is necessary to previously fix and pipe a metal tube for heat exchange inside the liquid tank, so that each operation such as installation and maintenance is very troublesome. In addition, there is a problem that the cost for the equipment is relatively high, and there is a problem that it is difficult to clean the inside of the liquid tank and perform other various maintenances due to the hindered metal pipe.

[0004] The applicant of the present invention has proposed the above-mentioned Japanese Utility Model Application No. 61-80.
No. 041 (Japanese Utility Model Application Laid-Open No. 62-192072), a double-pipe type heat pipe that can easily and efficiently heat or cool a liquid without piping a metal pipe in the liquid tank. A switch was proposed.

FIG. 4 is a side view showing the structure of the heat exchanger according to the above-mentioned application, and FIG. 5 is an enlarged sectional view of this heat exchanger. Is the outer tube,
Reference numeral 11 denotes an inner pipe vertically provided inside the outer pipe 10, and 12 denotes an outer pipe 10
A medium discharge pipe connected to the upper end of the inner pipe 11 using a plug 12a, a medium supply pipe 13 connected to a supply port (not shown) opened at the upper end of the outer pipe 10 using a plug 13a, .. Are baffle plates with small holes 14a which are vertically spaced from the inner tube 11 and which are attached to the outer tube 10 with a gap 14b therebetween. Is suspended in the liquid tank S containing the liquid W by using the holder 15 and the outer pipe 10 is supplied through the supply pipe 13.
The outer tube 10 is used as a heat transfer wall to heat or cool the liquid W while the medium supplied therein is repeatedly pressed and released by baffles 14.

However, the above heat exchanger has a structure in which the outer tube 10 is suspended vertically in the liquid tank S as shown in FIG. In the case of using the heat exchanger, the neck portion (upper side of the outer tube 10) of the heat exchanger exhibiting the highest heat exchange action protrudes toward the upper surface side of the liquid W. In some cases, heating or cooling could not be performed as desired.

Accordingly, the present applicant has filed a Japanese Utility Model Application No. 62-13 / 1987.
By forming both the outer pipe and the inner pipe into a substantially L-shape in No. 1268 (Japanese Utility Model Application Laid-Open No. 64-38467), the above neck portion which exhibits the highest heat exchange action even in a liquid tank having a shallow water depth is formed. An L-tube heat exchanger configured to be submerged in liquid is provided.

[0008]

However, since the depth of the liquid tank S used varies depending on the purpose of use, it is necessary to adjust the depth of the liquid tank S so that the neck of the heat exchanger is always submerged in the liquid. Since various types of L-shaped heat exchangers having different bending positions and dimensions are required, there is a problem in that the manufacturing operation is complicated and the manufacturing cost is increased, and thus the whole is formed in a substantially L-shape. The heat exchanger must be bent into an L-shape inside the outer pipe bent into an L-shape, and an inner pipe with baffle plates attached at intervals on its peripheral surface must be inserted to form a double-pipe structure. Therefore, there is a problem that the manufacturing operation becomes more complicated and the manufacturing cost rises. In addition, a gap provided on the outer periphery of the baffle plate (FIG. 5)
(Corresponding to No. 14b) is difficult to hold, which hinders the distribution of the medium and has a problem that the heat exchange effect cannot be sufficiently exerted, and it has been desired to solve the problem.

Therefore, a technical problem of the present invention is that the heat exchanger can be in a straight state or a substantially L-shaped bent state, and the L-shaped bending degree can be freely changed. Accordingly, it is an object of the present invention to provide a heat exchanger that can cope with a liquid tank at any depth and exhibit an excellent heat exchange action.

[0010]

Means taken by the present invention to solve the above technical problems are as follows. Inside the outer tube provided with a supply port for supplying a medium for heat exchange at the upper end side, insert the inner tube provided with a receiving port for the medium at the lower end, and supplied from the supply port into the outer tube. In a heat exchanger configured to lead the medium after the heat exchange through the inside of the inner pipe from the receiving port to the outside of the outer pipe,

(1) Both the outer tube and the inner tube are made of a flexible metal pipe having a bellows-shaped cross section.

(2) The receiving port opened at the lower end of the inner pipe is
Cut diagonally.

[0013]

The above means operates as follows. According to the above-mentioned means (1), since both the outer pipe and the inner pipe are formed using flexible metal pipes, the pipes can be straightened according to the water depth of the liquid tank to be used, or can be arbitrarily selected. Can be used in the state of being bent into an L-shape at the position of, so that the neck part can always be set in the state of being immersed in the liquid, and excellent heat exchange action can be exhibited, and it has a bellows-shaped cross section. Since the irregularities of the inner and outer tubes repeatedly compress and release the medium supplied into the outer tube, it is possible to exhibit an excellent heat exchange action without providing a baffle plate.

According to the above-mentioned means (2), even if the heat exchanger is bent at any angle, the receiving inlet of the inner pipe is cut obliquely, so that the inner pipe is bent depending on the degree of bending between the outer pipe and the inner pipe. The receiving port of the pipe is not blocked by contacting the inner wall surface of the outer pipe, and the used medium can always be sent out from the receiving port to the outside through the inner pipe.
The heat exchanger can be freely bent so that it can be used without trouble in various liquid tanks having different water depths. As described above, the technical problems described above can be solved by the above means, and the problems of the conventional technology can be solved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the heat exchanger according to the present invention will be described in detail with reference to the accompanying drawings. FIG.
FIG. 3 is a front perspective view illustrating a use state of the present invention, and FIG. 2 is an enlarged sectional view showing a part of the present invention in a partially omitted manner.
2 is an enlarged cross-sectional view taken along the line AA in FIG. 2. In these drawings, reference numeral 1 generally indicates a flexible metal pipe (flexible metal pipe).・ Metallic conduit) and upper end 1b and lower end 1c
And 1a denotes a straight pipe portion connected to the upper end side of the outer tube 1, 2 denotes a medium supply port protruding from an upper side surface of the straight pipe portion 1a, and 3 denotes a medium supply port. A flexible pipe for medium supply is shown in which a plug 3a at the tip is screwed and connected to the supply port 2.

Next, what is indicated generally by the reference numeral 4 is an inner pipe vertically provided inside the outer pipe 1, and the inner pipe 4 is entirely made of the same flexible metal pipe as the outer pipe 1. The outlet is formed to have a considerably smaller diameter than the outer tube 1, and has a straight pipe portion connected to the upper end side protruding above the upper end surface 1 b closed by the outer tube 1 to form a screw on the peripheral surface. 4a, and a lower end portion located inside the closed lower end portion 1c of the outer tube 1 is provided with an obliquely cut medium receiving port 4b.

Reference numeral 5 denotes a flexible pipe for discharging the medium, which is connected by screwing a plug 5a attached to the tip end to the discharge port 4a of the inner pipe 4, and 5b is a steam trap connected to the plug 5a. , 6 denote clip-shaped holders for suspending the entire heat exchanger according to the present invention in a liquid tank S containing liquid W, and 1X... And 4 in FIGS.
X is a corrugated uneven surface formed on the wall surface of the outer tube 1 and the inner tube 4 respectively; R is a medium passage formed between the outer tube 1 and the inner tube 4; 3 shows a discharge passage.

Since the heat exchanger according to the present invention has the structure as described above, it is suspended in the liquid tank S using the holder 6 as shown in FIG. 1, and the main supply pipe (not shown) and the supply pipe 3 are provided. When the medium is supplied from the supply port 2 to the inside of the outer tube 1 through the supply port 2 at a predetermined pressure, the supplied medium is sequentially directed to the front end in the passage R between the outer tube 1 and the inner tube 4 as shown by an arrow in FIG. .., 4X... Of the outer tube 1 and the inner tube 4 are compressed and released repeatedly, and heat is transferred to the liquid W by using the outer tube 1 as a heat transfer wall. Or warm it up,
Alternatively, on the contrary, cooling is performed by removing the heat of the liquid W. Next, the medium that has been heated or cooled in this way flows into the inner pipe 4 from the obliquely cut receiving port 4b, and flows into the discharge passage 4c.
And is sequentially discharged through the pipe 5 from the discharge port 4a.

Further, in the present invention, since each of the outer tube 1 and the inner tube 4 constituting the heat exchanger is configured to be bendable by using a flexible metal pipe, the outer tube 1 and the inner tube 4 are adapted to the water depth of the liquid tank S to be used. This can be used in the straight pipe state shown by the solid line in FIG.
Alternatively, as shown by a virtual line in FIG.
Since it can be used by bending in the shape of a letter, the neck portion of the outer tube 1 exhibiting the highest heat exchange effect is always used in a state of being immersed in the liquid W to exhibit an excellent heat exchange effect. Enable.

[0020]

The heat exchanger according to the present invention is as described above. Since both the outer tube and the inner tube are formed using flexible metal pipes having a bellows-shaped cross section, they are used. When the water depth of the liquid tank is deep, it is used as it is in a straight pipe state, and when it is shallow, it can be used by bending it into an approximately L shape from an appropriate part, so by making one type of heat exchanger, It has versatility and functionality that can be used in liquid baths of various depths to exhibit excellent heat exchange action, and since both the inner and outer tubes are flexible, the inner tube can be easily placed inside the outer tube. Can be made into a double structure. In addition, the bellows of the inner and outer pipes (irregular surfaces) repeatedly compress and release the medium flowing, so that the outer pipe can be used as a heat transfer wall without baffles. It has the advantage of exhibiting an excellent heat transfer function and effectively heating or cooling the liquid. In addition to the fact that the structure is simple and can be manufactured at a relatively low cost, and that the receiving opening of the inner pipe can be cut obliquely to prevent the receiving opening from being blocked by bending, heating of various liquids can be achieved. It is a revolutionary use for cooling.

[Brief description of the drawings]

FIG. 1 is a front perspective view illustrating a use state of a heat exchanger according to the present invention.

FIG. 2 is an enlarged cross-sectional view of the heat exchanger according to the present invention, with a part thereof omitted;

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 4 is a side view illustrating a use state of a conventional example.

FIG. 5 is an enlarged sectional view of a conventional example.

[Explanation of symbols]

 Reference Signs List 1 outer pipe made of flexible metal pipe 1X uneven surface 2 supply port 4 inner pipe made of flexible metal pipe 4b receiving port

Claims (2)

(57) [Scope of request for utility model registration] 1. An inner tube provided with an inlet for the medium at a lower end thereof is inserted into an outer tube provided with a supply port for supplying a medium for heat exchange at an upper end side. In a heat exchanger configured to lead the medium supplied to the tube and having completed the heat exchange to the outside of the outer tube through the inside of the inner tube from the receiving port, both the outer tube and the inner tube are connected. A heat exchanger comprising a flexible metal pipe having a bellows-shaped cross section. 2. The heat exchanger according to claim 1, wherein a receiving opening opened at a lower end of the inner pipe is cut obliquely.