JPH0663663B2 - Heat exchanger - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heat exchange device used for a water heater, etc., and is particularly suitable as a heat storage type heat exchange device.

[Conventional technology]

Actual exploitation No. 48-74553, actual exploitation No. 50-63641 or actual exploitation No. 48-3
The conventional apparatus described in No. 0543 is, as shown in FIG. 20, a container 1, a flange 2, and a heat storage material 4 contained therein.
(Latent heat storage material such as water, oil and sodium thiosulfate, particles such as alumina and magnesium), a heat transfer pipe 5, and a heating element 6.

Further, in JP-A-54-86533, a heater is built in the center of a cylindrical body, the front surface side is separated by an escape groove, and a screw groove is formed in which the number of threads is sequentially reduced from N at the tip end. There is disclosed a heating device in which a cover is removably fitted so as to be in close contact with the outer periphery and airtight between the screw grooves, and a paint flow passage is formed by the screw grooves and the cover.

[Problems to be Solved by the Invention]

In the above prior art, (1) heat transfer pipe 5 and heating element 6
Since the and are separated, the number of joints between the flange 2 and the heat transfer pipe 5 and the heating element 6 increases, and it is difficult to design the pressure resistant and heat resistant of the flange 2. (2) When the heat is removed from the heat storage material 4, if the amount of heat released from the heat storage material 4 is insufficient, it is possible to energize the heating element 6 to directly heat the heat medium in the heat transfer pipe 5 to reheat it. However, there is a problem that the heating efficiency is poor, (3) a heating element dedicated for individual heating is required for this, and (4) it is extremely difficult to clean the scale when it adheres to the heat transfer pipe. ing.

Further, the one disclosed in JP-A-54-86533 has the problem of (4) above, in which the thread groove is not divided into an inflow groove and an exhaust groove, and the fluid does not flow in a counter flow. is doing.

It is an object of the present invention to obtain a heat exchange device that improves the above-mentioned prior art points.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, a heat exchange device of the present invention includes a heat transfer body containing a heating element, and a tube body having the heat transfer body inserted therein and having one end sealed. An inflow groove and an exhaust groove for passing a fluid are provided between the heat body and the pipe body, and a fluid folding portion is provided on the sealing side in the pipe body, and a fluid inlet portion and an outlet portion are provided on the other end side. Is provided, and the heat transfer body is configured to be detachable from the tube body.

Furthermore, if this heat exchanger device is provided in the heat storage material in the heat storage tank, a heat storage type heat exchange device that achieves the above object can be obtained.

[Action]

Since the heat transfer body having the groove through which the heat medium passes is provided between the tube body and the heat generating body, the heat transfer pipe as shown in FIG. 20 is unnecessary. As a result, the number of welding points on the flange is reduced, and the pressure and heat resistant design is facilitated. In addition, since the grooved heat transfer body through which the heating element and the heat medium pass, and the grooved heat transfer element and the tube body are in close contact, the heat storage material can be heated by the heating element,
The heating medium can also be heated directly. The grooved heat transfer member is removable, and the scale and the like adhering to the groove can be easily removed by cleaning.

〔Example〕

1 and 2 show an embodiment of the heat exchange device of the present invention, and FIGS. 3 and 4 are views taken along arrows AA ′ and BB ′ of FIG. 1, respectively. is there. Inside the tube body 3 attached to the flange 2 is provided a heat transfer body 7 (metal such as copper or stainless steel, plastic etc.) as shown in the figure.
A heating element (heater) 6 is inserted therein. Heat transfer body 7
The cross-sectional shape of is not necessarily circular, but may be rectangular, oval or the like. FIG. 2 is an enlarged view of the heat transfer body 7 portion of FIG. 1. On the outer surface of the heat transfer body 7, an inflow groove 8 through which the heat medium (water, steam, air, oil, freon, etc.) as shown in the drawing passes. And a discharge groove 9 is provided. The cross-sectional shape of these grooves does not necessarily have to be rectangular, and various shapes such as triangle and ellipse may be used. In this embodiment, the inflow groove 8 and the exhaust groove 9 are constituted by a spiral groove (double-threaded screw shape). First
In the figure, the inflow groove 8 is indicated by a mark, and the discharge groove 9 is indicated by a cross mark. The inflow groove 8 is connected to the inlet portion 10 provided in the lower portion, and the discharge groove 9 is connected to the outlet portion 11 provided in the lower portion. Further, a protrusion 15 is provided at the lower end of the flange 2,
The inlet pipe 12 and the outlet pipe 13 attached to the projecting portion 15 communicate with the inlet portion 10 and the outlet portion 11, respectively. One use of the heat exchange device configured in this way is as a heat storage material 4 (water, oil,
It is used by inserting it into a latent heat storage material such as sodium thiosulfate, a particle of alumina or magnesium, a chemical heat storage material such as quicklime, as shown in the figure. Then, the flange 2 and the flange 2'at the end of the container 1 are connected by bolts or the like to prevent the heat storage material 4 from leaking to the outside. When the heat is stored in the heat storage material 4, the heating element 6 is energized, and the heat generated at this time is transmitted to the heat transfer body 7, the mountain portion 7 ′ of the heat transfer body, the pipe 3, the heat storage material 4 in this order, and the heat storage material 4 Heat is stored in. When the heat stored in the heat storage material 4 is taken out and used for heating or the like, a heat medium is introduced into the inlet pipe 12. This heat medium passes through the inlet portion 10 and the inflow groove 8, and the flow is reversed at the turnback portion 20, and in the process of passing through the exhaust groove 9 and the outlet portion 11, the heat of the heat storage material 4 is received and the temperature is raised, and the outlet pipe 13 portion is provided. It is installed in a radiator, a bath, etc. installed outside. If a fin is provided outside the pipe 3 and arranged so as to extend into the storage material 4, the pipe 3
The heat resistance from the heat storage material 4 to the heat storage material 4 and the heat resistance from the heat storage material 4 to the pipe 3 are reduced, and the heat storage time can be shortened and the heat dissipation characteristics can be improved. When the heat retention of the heat storage material 4 is insufficient, sometimes the heating element 6
This makes it possible to effectively heat and heat the heat medium passing through the inflow groove 8 and the exhaust groove 9 via the heat transfer body 7. That is, the heating can be performed only by the heating element 6 without providing a separate heating element.

Such a heat exchange device can be widely used in a sensible heat storage device using liquid or solid, a heat storage device using latent heat, a chemical heat storage device using chemical reaction heat of zeolite, lime, or the like.

FIG. 5 shows another embodiment, which is shown in FIG. 6, FIG. 7, FIG.
FIG. 9 is a sectional view taken along the line CC ′ of FIG. 5, and DD ′ is shown in FIG.
It is a sectional view, EE 'sectional view, and FF' sectional view. First
In the illustrated embodiment, the inflow groove 8 and the discharge groove 9 are spiral grooves (double-threaded screw shape), but in this embodiment, they are linear grooves. There are two pairs of grooves, and the heat medium flowing in from one inlet pipe 12 passes through the inlet portion 10, the inlet groove 8, the turn-back groove 17 provided at the end portion 16, the discharge groove 9, and the outlet portion 11, It is discharged from the outlet pipe 13 to the outside. Similarly,
The heat medium flowing in from the other inlet pipe 12 'passes through the inlet portion 10', the inlet groove 8 ', the return groove 18 provided in the end portion 16, the discharge groove 9', and the outlet portion 11 ', and then the outlet. It is discharged from the pipe 13 'to the outside. A method may be adopted in which the heat medium flowing in the two pairs of grooves is the same, the heat medium discharged from the outlet pipe 13 is introduced into the inlet pipe 12 ', and the temperature is further raised. Further, the type of the heat medium flowing into the inlet pipe 12 and the inlet pipe 12 'is changed, or even if the heat medium is the same, the flow rate of the heat medium flowing into each of the inlet pipes 12 and 12' is changed to change the outlet pipe 13 and the outlet pipe. The temperature of the heat medium discharged from the pipe 13 'may be changed. Although two pairs of grooves are used in this embodiment, three or more pairs may be used.

In the above-mentioned embodiment, when there is a gap between the heat transfer body 7 and the tube body 3, as shown by the arrow in FIG. 6, through the gap, from the inflow groove 8 to the exhaust groove 9 ', and the inflow groove 8'. There is a case where a part of the heat medium leaks from the ′ to the discharge groove 9 on the way, and the heat medium having a sufficiently high temperature cannot be obtained from the respective outlet pipes 13 and 13 ′. 10 to 12 show an embodiment for solving the leak.

In FIG. 10, a sealing material 19 '(heat resistant rubber, heat resistant felt, etc.) is interposed between the heat transfer body 7 and the tube body 3. FIG. 11 shows a method in which the outer surface of the heat transfer body 7 is longitudinally provided with a seal groove 19 as shown in the drawing, and a seal material 19 ′ is put in the seal groove 19 to prevent the leakage. is there. FIG. 12 shows a sealing method in the heat exchange device of the present invention having a double threaded configuration. In this embodiment, a female screw is cut on the tube body 3, and the ridge portion 7'of the heat transfer body 7 is fitted into this female screw portion to help the leakage of the heat medium. Further, a sealing groove 19 is cut in the mountain portion 7 ', and a sealing material 19' is inserted in the sealing groove 19.

FIG. 13 shows another embodiment, which is a sectional view taken along line HH 'in FIG.
FIG. 14 is a sectional view taken along the line GG ′ in FIG. This is a structure in which the inflow groove 8 and the exhaust groove 9 are divided into a plurality of small spaces by thin ridges 7 '. The fin height of the mountain portion 7'between the inflow groove 8 and the exhaust groove 4 is made slightly higher, and the tip end 7a thereof is fitted in the female groove of the pipe body 3. This is to prevent the heat medium from leaking from the inflow groove 8 side to the exhaust groove 9 side. In this embodiment, if a large number of thin ridges 7'are used, the amount of heat exchange per unit time increases due to the increase in the heat transfer area.

FIG. 15 shows another embodiment, which is a sectional view taken along line JJ ′ of FIG.
FIG. 16 is a sectional view taken along the line II ′ of FIG. This is one in which both the heating element 6 and the hole for the inflow groove 8 are provided in the heat transfer element 7. The space between the ridges 7 ′ attached to the outer surface of the heat transfer body 7 is constituted only by the drain groove 9. The heat medium that has entered the inflow groove 8 in the heat transfer body 7 flows into the drain groove 9 after passing through the folded portion 20. In addition, in this embodiment, a hole for the heating element 6, the inflow groove 8 and a hole for the discharge groove 9 are provided in the heat transfer body 7, and the discharge groove 9 portion on the outer surface of the heat transfer body 7 is made solid. Good.

FIG. 17 shows another embodiment. This is for the case where the tube body 3 is bent, and as the heating element 6, a bundle of flexible sheathed heaters is used. The heat transfer body 7 is also made of soft metal (lead,
Aluminum) or the like is used.

FIG. 18 shows another embodiment. This is a combination of a heat exchange device 30 having a linear groove and a heat exchange device 40 having a spiral (double thread screw) groove. In this, the heat exchange device 30 changes the heat medium from liquid to vapor, and this vapor is introduced into the heat exchange device 40 having a large heat transfer area to further raise the temperature and superheat. According to experiments, the heat exchange device 30 having a linear groove is effective for heating a single-phase flow of a liquid and converting the liquid into a vapor, and the heat exchange device having a spiral groove (double-thread screw shape). 40 is effective for heating the vapor single-phase flow and the liquid single-phase flow. Therefore, in the embodiment of FIG. 18, it is effective to provide a separate heat exchanger with spiral groove for heating liquid (single-phase flow) in front of the heat exchanger 30 with linear groove and use it for preheating. Various systems can be formed. Further, a plurality of linear grooved heat exchangers and spiral grooved heat exchangers can be used by connecting them in parallel or in series. In this embodiment, in order to remove the water content in the steam after exiting the outlet pipe 13 of the heat exchanger 30, the steam is passed through the gas-liquid separator 21 and then introduced into the inlet pipe 12 of the heat exchanger 40. Good to do. It is preferable that the water separated by the gas-liquid separator 21 is returned to the inlet pipe 12 of the heat exchange device 30 at the preceding stage to be refluxed.

FIG. 19 shows another embodiment. In this structure, the inlet pipe 12 and the outlet pipe 13 are provided on the flange 14 and the protrusion 15 is omitted.

In the above embodiment, when a scale or the like adheres to the inflow groove 8 and the discharge groove 9, if the flange 14 is removed from the protrusion 15, the scale in the groove can be easily cleaned and removed.

〔The invention's effect〕

As described above, according to the present invention, (1) the structure of the flange is simplified, and the pressure-resistant and heat-resistant design is facilitated. (2) The heating element for heat storage has one heating element for reheating. (3) It is easy to remove the scale generated in the groove of the heat transfer body, and (4) the fluids flowing in the groove are counter flows, so the heat transfer is good and the heat transfer body is uniform. It is possible to obtain effects such as easy averaging to various temperatures.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of the heat exchange device of the present invention, FIG. 2 is a partially enlarged view of the heat transfer section of FIG. 1, FIG.
FIG. 4 is a view taken along the line AA ′ in FIG. 1, a view taken along the line BB ′, and FIG. 5 is a longitudinal sectional view showing another embodiment of the present invention, FIG. 6, FIG. 8 and 9 are C of FIG. 5, respectively.
-C 'sectional view, DD' sectional view, EE 'sectional view, F-
FIG. 10 and FIG. 13 are views showing another embodiment of the present invention. FIG. 10 and FIG. 11 are plan sectional views, and FIG. 12 and FIG. 13 are vertical sectional views ( Figure 13 is the first
4 is a sectional view taken along line HH 'of FIG. 4), and FIG.
G'cross section, FIG. 15 is a vertical cross section showing another embodiment (cross section JJ 'in FIG. 16), and FIG. 16 is I-- in FIG.
FIG. 17 is a vertical sectional view showing another embodiment of the present invention, and FIG. 20 is a vertical sectional view showing a conventional device. 1 ... Container, 2 ... Flange, 3 ... Tube, 4 ... Heat storage material, 5 ... Heat transfer pipe, 6 ... Heating element, 7 ... Heat transfer element,
7 '... mountain portion, 8, 8' ... inflow groove, 9, 9 '... discharge groove, 10 ... inlet portion, 11 ... outlet portion, 12 ... inlet pipe, 13 ... outlet pipe, 14 ...... Flange, 15 ...
… Protrusions, 16 …… Ends, 17,18 …… Folding grooves, 1
9 ... Seal groove, 19 '... Seal material, 20 ... Folding portion, 21 ... Gas-liquid separator, 30 ... Heat exchanger using linear groove, 40 ... Heat using spiral groove Exchange device.

Front page continued (72) Inventor Yoshimi Ezaki Yoshimi Esaki, Nagoya City, Midori-ku, Aichi Prefecture, Kitakanyama, Otaka-cho, 20-1, Chubu Electric Power Co., Inc. Power Technology Research Laboratory (72) Inventor Toshio Inoue Midori-ku, Nagoya City, Aichi Prefecture 20-1 Kitakousan, Otakacho Chubu Electric Power Co., Inc. Power Technology Research Laboratory, Technology Development Division (72) Inventor Masanobu Kashiya 2271-334 Shimoshidanamianaga-cave, Moriyama-ku, Nagoya Aichi Kenji Matsuda Aichi 94-3 Ueda Ipponmatsu, Tenpaku-cho, Tenpaku-ku, Nagoya (56) Reference JP-A-54-86533 (JP, A) JP-A-60-62546 (JP, A) Actual development-Sho 54-109943 (JP, U) Actual Kai 60-18444 (JP, U) Actual public 41-1651 (JP, Y1)

Claims (5)

[Claims] 1. A heat transfer body containing a heating element, and a tube body in which the heat transfer body is inserted and whose one end is sealed. A fluid is provided between the heat transfer body or between the heat transfer body and the tube body. An inflow groove and an exhaust groove to be passed are provided, and a fluid folding portion is provided on the sealing side in the pipe body, and a fluid inlet portion and an outlet portion are provided on the other end side.
A heat exchange device, wherein the heat transfer member is configured to be detachable from the pipe body. 2. The heat exchange device according to claim 1, wherein the inflow groove and the exhaust groove are provided spirally on the outer surface side of the heat transfer body. 3. The heat exchange device according to claim 1, further comprising sealing means provided between the inflow groove and the exhaust groove. 4. A heat exchange device comprising a plurality of the heat exchange devices according to claim 1 connected in series or in parallel. 5. A heat exchange device configured by providing the heat exchange device according to claim 1 in a heat storage material in a heat storage tank.