JPH0622769U - Heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] To enable the heat exchanger to be used straight or bent into an L shape. [Structure] A medium is supplied from the supply port 2 to the inside of the outer pipe 1 and finished with heat exchange, and is guided to the outside of the outer pipe 1 through the inside of the inner pipe 4 from the receiving port 4b. Both 1 and the inner pipe 4 are configured by using a flexible metal pipe having a bellows-shaped cross section.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat exchanger suitable for heating or cooling various liquids.

[0002]

[Prior art]

 Although there is a heat exchanger as a means for heating or cooling various liquids contained in the liquid tank, a conventional general heat exchanger has a metal tube in the liquid tank having a substantially U shape, or The fixed pipe is formed in a serpentine shape, and various heat media or refrigerants are supplied into the metal pipe to heat or cool the liquid in the liquid tank by heat exchange.

However, in the above-described conventional heat exchanger, it is necessary to previously fix a metal pipe for heat exchange inside the liquid tank, so that each work such as installation and maintenance is very troublesome. However, there was a problem that the cost of the equipment was expensive, and that the metal pipes that were piped interfered with the cleaning of the liquid tank and various other maintenance tasks.

Therefore, the applicant of the present application filed an application of Japanese Utility Model Application No. 61-80041 (Japanese Utility Model Application Laid-Open No. 62-192072) so that the liquid can be easily and easily dispensed with a metal pipe in the liquid tank. , Proposed a double tube type heat exchanger that can efficiently heat or cool.

FIG. 4 is a side view showing the configuration of the heat exchanger according to the above application, and FIG. 5 is an enlarged cross-sectional view of this heat exchanger. Is an outer pipe, 11 is an inner pipe vertically provided in the outer pipe 10, 12 is a medium discharge pipe connected to the upper end of the inner pipe 11 protruding from the outer pipe 10 by using a plug 12a, and 13 is an upper end of the outer pipe 10. The medium supply pipes 14 connected to the supply port (not shown) opened at the section using a plug 13a are vertically spaced from the inner pipe 11, and a gap 14b is formed between the medium supply pipe and the outer pipe 10. The baffle plate with the small holes 14a that is opened and attached, and the heat exchanger configured in this way is hung by the holder 15 in the liquid tank S containing the liquid W, and the supply pipe 13 is passed through. The medium supplied into the outer tube 10 is applied to the baffle plates 14 ... to repeat compression and release. On the other hand, the outer tube 10 is used as a heat transfer wall to heat or cool the liquid W.

However, since the above heat exchanger has a structure in which the outer pipe 10 is suspended vertically in the liquid tank S as shown in FIG. 4, the liquid tank S has a shallower water depth than that shown in the figure. When it is used for liquid, the neck portion (upper side of the outer tube 10) of the heat exchanger that exhibits the highest heat exchange effect projects to the upper surface side of the liquid body W, so that the heat exchange loss becomes large and the liquid is lost. In some cases, W could not be heated or cooled as desired.

Therefore, the applicant of the present application, in Japanese Utility Model Application No. 62-131268 (Japanese Utility Model Application Laid-Open No. 64-38467), bends both the outer pipe and the inner pipe in a substantially L-shape so that the water depth can be increased. Provided is an L-tube heat exchanger having a structure capable of submerging the neck portion, which exhibits the highest heat exchange action even in a shallow liquid tank, into the liquid.

[0008]

[Problems to be solved by the device]

 However, since the depth of the liquid tank S used varies depending on the purpose of use, in order to always immerse the neck part of the heat exchanger in the liquid, there are many types with different bending positions and dimensions according to the depth of the liquid tank S. Since this requires an L-shaped heat exchanger, there is a problem that the manufacturing work becomes complicated and the manufacturing cost rises. In addition, the heat exchanger that is formed into a substantially L-shaped structure as described above becomes an L-shaped heat exchanger. Since the inner tube, which is also bent into an L-shape inside the bent outer tube and has baffle plates mounted at intervals on the peripheral surface, must be inserted to form a double-tube structure, it is a further manufacturing task. However, it is difficult to maintain a gap (corresponding to 14b in FIG. 5) provided on the outer circumference of the baffle plate, which hinders the flow of the medium, and causes a sufficient heat exchange. It has a problem that it cannot exert its effect, and its solution is desired. Which was.

Therefore, the technical problem of the present invention is that the heat exchanger can be straightened or bent into a substantially L-shape, and the bending condition of the L-shape can be freely changed. Thus, it is an object of the present invention to provide a heat exchanger capable of responding to a liquid tank of any depth and exhibiting an excellent heat exchange action.

[0010]

[Means for Solving the Problems]

 Means taken in the present invention to solve the above technical problems are as follows. The inner pipe having the inlet for the medium at the lower end is inserted into the outer pipe having the supply port for supplying the medium for heat exchange at the upper end, and is supplied into the outer pipe from the above-mentioned supply port. In the heat exchanger configured so that the medium, which has completed the heat exchange through the above-mentioned inlet, passes through the inside of the inner pipe to the outside of the outer pipe,

(1) Both the outer pipe and the inner pipe are configured by using flexible metal pipes having a bellows-shaped cross section.

(2) The inlet opening at the lower end of the inner pipe is cut diagonally.

[0013]

[Action]

 The above means operate as follows. According to the above-mentioned means (1), since both the outer pipe and the inner pipe are formed by using the flexible metal pipes, the outer pipe and the inner pipe are in a straight state according to the water depth of the liquid tank to be used, or an arbitrary state. Since it can be used by bending it in an L-shape at the position of, it can be set in a state where the neck part is always submerged in the liquid to achieve an excellent heat exchange effect, and it has a bellows-shaped cross section. Since the unevenness of the inner and outer tubes repeats compression and release of 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), no matter what angle the heat exchanger is bent, the inlet of the inner pipe is cut obliquely. Since the inlet of the pipe is not blocked by contacting the inner wall surface of the outer pipe, the used medium can always be sent out from the inlet through the inner pipe to the outside. It is possible to freely bend and use it in various liquid tanks with different water depths without any problems. 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]

【Example】

 Hereinafter, preferred embodiments of the heat exchanger according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a front perspective view illustrating a usage state of the present invention, FIG. 2 is an enlarged sectional view showing a part of the present invention omitted, and FIG. 3 is a sectional view taken along line AA of FIG. An enlarged cross-sectional view is shown. In these drawings, reference numeral 1 generally indicates that the entire upper end 1b is made of a flexible metal pipe (flexible metallic conduit). And an outer pipe made by closing the lower end portion 1c, 1a indicates a straight pipe portion connected to the upper end side of the outer pipe 1, and 2 indicates a medium supply projecting on the upper side surface of the straight pipe portion 1a. A port, 3 is a flexible pipe for medium supply, in which a plug 3a at the tip is screwed into and connected to the supply port 2.

Next, reference numeral 4 generally indicates an inner pipe vertically provided inside the outer pipe 1, and the entire inner pipe 4 uses the same flexible metal pipe as the outer pipe 1. The diameter of the outer pipe 1 is considerably smaller than that of the outer pipe 1, and the straight pipe portion connected to the upper end side is projected above the closed upper end face 1b of the outer pipe 1 to form a screw on the peripheral surface. An outlet 4a is formed, and a diagonally cut medium receiving port 4b is opened at the lower end located inside the closed lower end 1c of the outer tube 1.

Further, 5 is a flexible pipe for ejecting a medium in which a plug 5a attached to the tip end is screwed and connected to the ejection port 4a of the inner pipe 4, and 5b is a steam trap connected to the portion of the plug 5a. , 6 shows a clip-shaped holder for suspending the entire heat exchanger according to the present invention in a liquid tank S containing a liquid W. Further, in FIGS. 2 and 3, 1X ... And 4X ... are outer tubes 1. And a concave-convex surface having a bellows-shaped cross section formed on the wall surface of the inner pipe 4, R denotes a medium passage formed between the outer pipe 1 and the inner pipe 4, and 4c denotes a discharge passage in the inner pipe 4.

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 are provided. When the medium is supplied to the inside of the outer tube 1 from the supply port 2 through the supply port 3 at a predetermined pressure, the supplied medium sequentially reaches the tip in the passage R between the outer tube 1 and the inner tube 4 as shown by the arrow in FIG. It flows toward the outer tube 1 and the inner tube 4 is repeatedly compressed and released by hitting the irregularities 1X ... and 4X ... Then, the liquid W is heated, or conversely, the heat of the liquid W is removed to cool it. Next, the medium which has been heated or cooled in this way flows into the inner pipe 4 through the obliquely cut receiving port 4b, rises in the discharge passage 4c, and passes through the pipe 5 from the discharging port 4a. It is discharged sequentially.

Further, in the present invention, since the outer pipe 1 and the inner pipe 4 constituting the heat exchanger are each configured to be bendable by using a flexible metal pipe, the water depth of the liquid tank S to be used can be adjusted. In addition, it can be used in a straight pipe state as shown by the solid line in FIG. 1, or can be used by bending it from an arbitrary part in the middle as shown by the phantom line in the figure into a substantially L-shape. Therefore, it is possible to use the neck portion of the outer tube 1 that exhibits the highest heat exchange effect while always being immersed in the liquid W, and exhibit the excellent heat exchange effect.

[0020]

[Effect of device]

 The heat exchanger according to the present invention is as described above, and since both the outer pipe and the inner pipe are constructed by using flexible metal pipes having a bellows-shaped cross section, the water depth of the liquid tank to be used is When it is deep, it can be used as it is in a straight pipe state, and when it is shallow, it can be used by bending it from an appropriate part into a substantially L shape, so by creating one type of heat exchanger, It has versatility and functionality that can be used in a liquid tank to exhibit excellent heat exchange action, and since both inner and outer tubes are flexible, it is easy to insert the inner tube into the outer tube. Can be made into a double structure, and since the bellows surfaces (concavo-convex surfaces) of both the inner and outer tubes repeat compression and release of the circulating medium, the outer tube is excellent as a heat transfer wall without providing a baffle plate. It has the advantage of exerting heat transfer effect to effectively heat or cool the liquid. It is used for heating and cooling various liquids, because it is simple and can be manufactured at a relatively low cost, and the inlet of the inner pipe can be cut diagonally to prevent clogging of the inlet due to bending. It is an epoch-making thing.

[Brief description of drawings]

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

FIG. 2 is an enlarged sectional view showing a heat exchanger according to the present invention with a part thereof omitted.

FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG.

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

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

[Explanation of symbols]

 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)

[Scope of utility model registration request] 1. An outer tube having a supply port for supplying a medium for heat exchange at the upper end side, and an inner tube having a receiving port for the medium at the lower end is inserted into the outer tube so as to be outside the supply port. In a heat exchanger configured so that the medium, which has been supplied into the pipe and has finished heat exchange, is led out of the outer pipe through the inside of the inner pipe from the receiving port, both the outer pipe and the inner pipe are A heat exchanger characterized by comprising a flexible metal pipe having a bellows-shaped cross section. 2. The heat exchanger according to claim 1, wherein the inlet opening at the lower end of the inner pipe is cut obliquely.