JPH0250045A - Heat exchanger - Google Patents

Abstract

PURPOSE:To facilitate an pressure-proof and heat-proof design, cause a thermal accumulating heater to be an additional heating member, enable one heater member to be used also for heating operation and facilitate a removal of scale within a thermal conducting pipe by a method wherein the heating member is enclosed by a pipe member and a groove in which thermal medium flows is formed between the pipe member and the heating member. CONSTITUTION:A thermal conducting member 7 is arranged within a pipe 3 arranged at a flange part 2. A heating member 6 is inserted into this thermal conducting member 7. An outer surface of the thermal conducting member 7 is provided with a flowing groove 8 and a discharging groove 9 for thermal medium. The thermal conducting member is inserted into a thermal accumulation material 4 within a container 1 during its use. It is connected by a bolt and the like between flanges 2 and 2' so as to prevent the thermal accumulation material 4 from leaking out of the device. When beat is to be accumulated in the thermal accumulation material 4, the heating member 6 is energized, and the heat generated at that time is transmitted in sequence to the thermal conducting member 7, a mountain part 7' of the thermal conducting member, a pipe 3 and the thermal accumulation material 4 and then the heat is accumulated in the thermal accumulation material 4. The thermal medium passing through the flowing groove 8 and the discharging groove 9 can be effectively heated by the heating member 6 through the thermal conducting member 7 and its temperature is increased. That is, an additional heating can be performed only with the heating member 6 without arranging a discrete heating member.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a heat exchange device used in water heaters and the like, and is particularly suitable as a heat storage type heat exchange device.

[Conventional technology]

The conventional apparatus described in Japanese Utility Model Application Publication No. 48-74553, Japanese Utility Model Application Publication No. 50-63641, or Japanese Utility Model Application Publication No. 48-30543, as shown in FIG. It is composed of a flange 2, a heat storage material 4 (water, oil, latent heat storage material such as sodium thiosulfate, particles such as alumina or magnesia) placed therein, a heat transfer pipe 59, and a heating element 6.

[Problem to be solved by the invention]

In the above conventional technology, (1) since the heat transfer pipe 5 and the heating element 6 are separated, the flange 2 and the heat transfer pipe 5
This increases the number of joints with the heat generating element 6, making it difficult to design the flange 2 to withstand pressure and heat. If the amount of heat is insufficient, it may be possible to energize the heating element 6 to directly heat the heat medium in the heat transfer pipe 5 to reheat the heat, but the reheating efficiency is poor. There are problems such as the need for a dedicated heating element for firing, and (4) when scale adheres to the inside of the heat transfer pipe, it is extremely difficult to clean it.

SUMMARY OF THE INVENTION An object of the present invention is to obtain a heat exchange device that improves the drawbacks of the prior art described above.

[Means to solve the problem]

The above object is achieved by a heat exchange device in which a heating element is surrounded by a tube and a groove is formed between the tube and the heating element 6 through which a heat medium flows. Furthermore, if this heat exchange device is provided in the heat storage material in the heat storage tank.

A regenerative heat exchange device that achieves the above object is obtained.

(Function) By providing a heat transfer body with a groove for the heat medium to pass between the tube and the heating element, a heat transfer pipe as shown in Part 20 is no longer necessary. The number of welding points is reduced, making pressure and heat resistant design easier.Also, since the heating element and the grooved heat transfer element through which the heat medium passes, and the grooved heat transfer element and the tube body are in close contact, the heat storage material is absorbed by the heating element. In addition to being able to heat
The heat medium can also be directly heated. The grooved heat transfer body is removable, and scales and the like attached to the grooves can be easily cleaned and removed.

〔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 the line A-A' in FIG. 1, respectively.
It is a BB' arrow view. Pipe 3 attached to flange 2
A heat transfer body 7 (made of copper, metal such as stainless steel, plastic, etc.) as shown in the figure is provided inside, and a heating element (heater) 6 is inserted into this heat transfer body 7. The cross-sectional shape of the heat transfer body 7 does not necessarily have to be circular, and may be elliptical or oval. FIG. 2 is an enlarged view of the heat transfer body 7 in FIG. The outer surface of the heating body 7 is provided with an inlet groove 8 and an outlet groove 9 through which a heat medium (water, steam, air, oil, fluorocarbon, etc.) passes as shown. The cross-sectional shape of these grooves does not necessarily have to be a hairstyle, but may be triangular,
Various shapes such as an ellipse may be used. In this embodiment, the inlet groove 8 and the outlet groove 9 are constituted by a spiral groove (double thread shape). In FIG. 1, the inflow groove 8 is marked with
Emissions @9 are marked with an x. The inflow groove 8 is provided at the lower part of the inlet part 10, and the discharge groove 9 is provided at the lower part of the outlet part 1.
Connected to 1. In addition, a protrusion 1 is provided at the lower end of the flange 2.
5 is provided, and an entrance vibrator 12.5 is attached to this protrusion 15. The exit vibes 13 are respectively connected to the entrance section 10.
．． It communicates with the outlet section 11. One way to use the heat exchange device configured in this way is to use the heat storage material 4 (water, oil, latent heat storage material such as sodium thiosulfate, etc.) in the container 1.
(Chemical heat storage materials such as alumina, magnesha particles, quicklime, etc.)
Insert and use as shown in the figure. 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 outside.

When storing heat in the heat storage material 4, electricity is applied to the first heating element 6, and the heat generated at this time is transferred to the heat transfer element 7. Mountain portion 7' of heat transfer body, tube 3. The heat is transmitted to the heat storage material 4 in this order, and the heat is stored in the heat storage material 4. When extracting the heat stored in the heat storage material 4 and using it for heating or other purposes, a heat medium is introduced into the inlet vibe 12. This heat medium passes through the inlet section 10, the inflow groove 8, and then the folded section 20.
The flow is reversed in the discharge groove 9. In the process of passing through the outlet section 11, the temperature of the heat storage material 4 is raised by the heat of the heat storage material 4, and the heat is introduced into an external radiator, bath, etc. through the outlet vibe 13 section. tube 3
If fins are provided on the outside of the tube and placed so as to extend into the storage material 4, the thermal resistance from the tube 3 to the heat storage material 4, and the heat storage material 4
Thermal resistance from the pipe 3 to the pipe 3 is reduced, and heat storage time can be shortened and heat dissipation characteristics can be improved. When the heat retained in the M heat material 4 is insufficient, the heating element 6 can effectively heat and raise the temperature of the heat medium passing through the inlet groove 8 and the outlet groove 9 via the heat transfer element 7. In other words, additional heating can be performed using only the heating element 6 without providing a separate heating element.

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

FIG. 5 shows other embodiments, 6vi, 71iii1
8 and 9 are a sectional view taken along the line CC', DD', EE', and F-F' in FIG. 5, respectively. In the embodiment shown in FIG. 1, the inlet groove 8 and the outlet groove 9 are spiral grooves (double-threaded), but in this embodiment they are straight grooves.

There are two pairs of grooves, and the heat medium flowing from one inlet vibe 12 flows into the inlet section 10. Inflow groove 8. Folded back F#17. provided at end 16. Discharge groove 9. After passing through the exit part 11, the air is taken out from the exit vibrator 13 to the outside. Similarly, the heat medium flowing from the other inlet vibe 12' is transferred to the inlet section 10'.
, an inlet groove 8', and a turn-back provided at the end 16? 1l1
8. After passing through the #li outlet groove 9' and the outlet part 11', it is discharged to the outside from the outlet vibrator 13'. It is also possible to use a method in which the heat medium flowing in the two pairs of grooves is the same, and the heat medium discharged from the outlet vibe 13 is introduced into the inlet vibe 12' to further raise the temperature. 12', or even if the heat medium is the same, the flow rate of the heat medium flowing into each inlet vibrator 12 and 12' can be changed to reduce the amount of heat discharged from the outlet vibrator 13 and the outlet vibrator 13'. The temperature of the medium may also be varied.

In this embodiment, there are two pairs of grooves, but there may be three or more pairs.

In the above embodiment, if there is a gap between the heat transfer body 7 and the tube body 3, as shown by the arrow in FIG.

Through the gap, a part of the heat medium leaks out from the inflow groove 8 to the exhaust groove 9' and from the inflow FI#B' to the exhaust groove 9, and the heat whose temperature has risen sufficiently from the respective outlet vibes 13 and 13' Media may not be available. FIG. 10 to FIG. 12 are examples for solving this problem.

FIG. 10 shows a sealing material 19' (
heat-resistant rubber, heat-resistant felt, etc.). In FIG. 11, a sealing groove 19 is provided in the longitudinal direction of the outer surface of the heat transfer body 7 as shown, and a sealing material 19' is inserted into the sealing groove 19 to prevent the above-mentioned leakage. be. FIG. 12 shows a sealing method for the heat exchange device of the present invention having a double-threaded configuration. In this embodiment, a female thread is cut in the tube body 3, and a peak 7' of the heat transfer body 7 is fitted into this female thread to help prevent leakage of the heat medium. Furthermore, a sealing groove 19 is cut in the crest 7'.
A sealing material 19' is contained within this sealing groove 19.

FIG. 13 shows another embodiment, which is a sectional view taken along the line H-H' in FIG. 14;
FIG. 14 is a sectional view taken along line GG' in FIG. 13. This is the inflow groove 8. The discharge groove 9 is divided into a plurality of small spaces by thin peaks 7'.

The fin height of the crest 7' between the inlet groove 8 and the outlet groove 4 is made slightly higher, and its tip 7a is fitted into the ridge of the tube body 3. This is to prevent the heat medium from leaking from the inlet groove 8 side to the outlet groove 9 side. In this embodiment, if a large number of thin peaks 7' are used, the heat transfer area increases and the amount of heat exchanged per unit time increases.

FIG. 15 shows another embodiment, which is a sectional view taken along J-J' in FIG.
FIG. 16 is a sectional view taken along line II' in FIG. 15. This has holes for both the heating element 6 and the inlet groove 8 in the heat transfer element 7. The space between the peaks 7' attached to the outer surface of the heat transfer body 7 is formed only by a drainage groove 9. The heat medium that has entered the inflow groove 8 in the heat transfer body 7 passes through the folded portion 20 and then flows into the drainage groove 9. In this embodiment, holes for the heating element 6 and the inflow groove 8, and holes 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 too.

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

FIG. 18 shows another embodiment. This is a combination of a heat exchange device 30 provided with a linear groove and a heat exchange device 40 provided with a spiral (double threaded) groove. The heat exchanger 30 changes the heat medium from liquid to vapor, and this vapor is introduced into the heat exchanger 40, which has a large heat transfer area, for further heating and superheating. Experiments have shown that the straight grooved heat exchanger 130 is effective in heating a single-phase flow of liquid and converting the liquid into vapor, whereas the helical grooved heat exchanger 130 is effective in heating a single-phase flow of liquid and converting the liquid into vapor. 40 is effective for heating single-phase streams of vapor and single-phase streams of liquids. Therefore, in the embodiment shown in Fig. 18, it is effective to install a heat exchanger with a spiral groove for heating a separate liquid (single-phase flow) in front of the heat exchanger 3o with a linear groove and use it for preheating. system can be formed.

Further, a plurality of heat exchange devices with linear grooves and heat exchange devices with spiral grooves can be used by connecting them in parallel or in series. In this embodiment, in order to remove moisture in the steam after leaving the outlet vibrator 13 of the heat exchanger 30, the steam passes through a gas-liquid separator 21 and is then introduced into the inlet vibrator 12 of the heat exchanger 40. It's good to do that.

The water separated by the gas-liquid separator 21 is preferably returned to the inlet vibrator 12 of the heat exchanger 30 at the previous stage to be circulated.

FIG. 19 shows another embodiment. This has an inlet vibe 12 on the flange 14. A protruding vibrator 13 is provided, and the protrusion 15 is omitted.

In the above embodiment, the inlet groove 8. When scale or the like adheres to the discharge groove 9, by removing the flange 14 from the protrusion 15, the scale within the groove can be easily cleaned and removed.

〔Effect of the invention〕

As explained above, according to the present invention, (1) the structure of the flange is simplified, and the pressure-resistant and heat-resistant design is facilitated;
) Effects such as the ability to use one heating element for heat storage and the heating element for reheating, and (3) easy removal of scale generated in the heat transfer pipes can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal 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 body portion of FIG. 1, and FIGS. A-A' arrow view, B-B' arrow view, FIG. 5 is a longitudinal sectional view showing another embodiment of the present invention, and FIG.
Figures 7, 8 and 9 are C- of Figure 5, respectively.
C' sectional view. DD' cross-sectional view, E-E' cross-sectional view, F-F' cross-sectional view, and FIGS. 10 to 13 respectively show other embodiments of the present invention, and FIGS. 12 and 13 are longitudinal sectional views (Fig. 13 is taken along H-H' in Fig. 14).
14 is a GG' sectional view of FIG. 13,
FIG. 5 is a longitudinal sectional view showing another embodiment (J-J' in FIG. 16).
cross-sectional view). Figure 16 is a sectional view taken along line II' in Figure 15, and Figures 17 to 1.
9 is a longitudinal sectional view showing another embodiment of the present invention, and FIG. 20 is a longitudinal sectional view showing a conventional device. 1... Container, 2... Flange, 3... Pipe body, 4...
...Heat storage material. 5... Heat transfer pipe, 6... Heating element, 7... Heat transfer element, 7'... Mountain part, 8, 8'... Inflow groove, 9, 9'...
...Discharge groove, 10...Inlet part, 11...Outlet part, 1
2... Entrance vibe. 13... Outlet vibe, 14... Flange, 15...
・Protrusion, 16... End, 17, 18... Turning groove, 19... Seal groove, 19'... Sealing material, 20.
...Folding section. 21... Gas-liquid separator, 30... Heat exchange device using linear grooves, 40... Heat exchange device 6 using spiral grooves
Agent: Patent attorney Katsuo Ogawa, ＜,T′〕. * Tomoe 3rd ward Nein Daimuzuan

Claims (1)

[Claims] 1. A heat transfer body containing a heating element, a groove provided on the outer surface of the heat transfer body, and a tube into which the heat transfer body is inserted,
A heat exchange device characterized in that the pipe body and the groove form a flow path through which a heat medium passes. 2. The heat exchange device according to claim 1, wherein the groove is formed in a spiral shape on the outer surface of the heat transfer body. 3. The heat exchange device according to claim 1 or 2, wherein the heat transfer body is configured to be detachable from the tube body. 4. The heat exchange device according to any one of claims 1 to 3, wherein the groove formed on the outer surface of the heat transfer body consists of an inlet groove and an outlet groove, and a sealing means is provided between these grooves. 5. A heat exchange device characterized in that a plurality of heat exchange devices according to claim 1 are connected in series or in parallel. 6. A regenerative heat exchange device configured by providing the heat exchange device according to any one of claims 1 to 5 in a heat storage material in a heat storage tank. 7. A heat storage type in which a heat exchange device in which a heating element is surrounded by a tube and a groove through which a heat medium flows is formed between the tube and the heating element is provided in a heat storage material in a heat storage tank. heat exchange equipment.