JPS6249109A - Fluid heating heater device - Google Patents

Abstract

PURPOSE:To improve an efficiency of a heater and accomplish an effective utilization of a thermal energy by a method wherein a helical flow passage for circulating the fluid heated by the helical fins arranged in contact with an inner member and an outer member is provided. CONSTITUTION:A helical flow passage 16 having its circumference closed by helical fins 14 is arranged between an outer member 1 and an inner member 3. Oil is routed from a pipe connected to an inlet 21 of fluid into the helical passage 16, this oil passes through a passage 16A and reached a return-back part 17,thereafter passed through the return passage 16B and then flows out of the end part 18 of the return passage 16B and flows out to the communication hole 4. The oil accumulated in the communication hole 4 enters a filter part 6B of a nozzle 6 and is injected from the injection hole at the extremity end of the nozzle 6. The oil is heated by the heating heater 10 through the inner member 3 while passing the helical passage 16, injected from the nozzle 6, ignited by the igniter and then combusted. The passage 16 through which the coil passes is in a helical form, long, and formed as a reciprocating type composed of a going passage 16A and a return passage 16B, resulting in that a superior efficiency of heating operation is assured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a fluid heating heater 1 for heating oil, for example.
This invention relates mainly to a heater device suitable as a nozzle heater for an oil burner.

[Background technology and its problems]

Ignite oil, especially heavy oil with high viscosity, using an oil burner.
In order to burn the oil, it is necessary to efficiently heat the oil near the spray nozzle to raise the oil temperature. Conventional methods of heating oil in oil burners include a line heater method in which a heating device is installed in the oil piping, a nozzle heater method in which a heating device is installed in the attachment part of the spray nozzle, and a combination of these methods. etc.

One example of a line heater method is one in which all of the oil is not jetted out from the nozzle, but some of the oil is circulated through a return line, and heated by a heating device while being circulated. According to the line heater method, the heating device is provided in the piping, which increases the size of the heating device and increases the equipment cost.

Furthermore, since the distance from the heating device to the spray nozzle is long, there is also the problem that the temperature of the heated oil drops before it reaches the nozzle.

On the other hand, the nozzle heater method has the advantages that the heating device is small and that the oil is ejected and burned immediately after being heated. One example of a nozzle heater method is one in which a rod-shaped heater is directly inserted into the oil flow passage to heat the oil, and the other in which the oil is heated by inserting a rod-shaped heater directly into the oil flow passage, and another in which the oil is heated by inserting the enclosed Otoko oil flow pipe of the Otoko heater between cloths, as in the case of Utility Model R5-43245. There are things that add indirectly. According to Konera, the partial heater efficiency is not necessarily 1't.
I couldn't.

Here, heater efficiency is defined as: When an electric heater is used as a heater, heater efficiency - In other words, when heating a constant amount of oil, heater efficiency is proportional to the amount of oil per supplied unit heat calorie and the temperature difference, and the amount of oil is If is constant, the higher the temperature rise of the oil due to heating, the better the heater efficiency will be.

If the heater efficiency is improved, thermal energy can be used effectively, and the temperature of the oil heated by the nozzle can be increased accordingly, resulting in good combustibility.

As a new type of nozzle heater method, JP-A-54
-149941, as shown in JP-A-55-158404, a PTC element (heat-sensitive resistance element) and bronze balls are used as heating elements, and the bronze balls are filled in the oil passage to energize the PTC elements. There is a known method that generates heat by heating the oil. This also causes a problem in that satisfactory heater efficiency cannot be obtained, and pressure loss occurs because the oil flows through the oil flow passage filled with bronze balls, making it impossible to obtain a sufficient amount of oil.

[Purpose of the invention]

The purpose of the present invention is to improve heater efficiency and effectively utilize thermal energy, and also to ignite and burn even heavy oil well when used as a nozzle heater of an oil burner. An object of the present invention is to provide a heater device for heating a fluid.

[Means and effects for solving the problem] For this reason, the fluid heating heater device according to the present invention houses an internal member inside an external member, and arranges a heating heater inside this internal member. A spiral fin is provided between the inner member and the outer member in contact with the inner member and the outer member, and the spiral fin forms a spiral passage through which the fluid heated by the heating heater flows. be.

Fluid such as oil flows along the spiral passage, and during this time it is heated by a heater via an internal member.

The passage through which the fluid passes 71 is formed in a spiral shape on the side of the inner member, so that efficient addition can be performed.

The fluid can flow into the spiral passage by, for example, providing a fluid inlet on the outside or by providing a pipe for the fluid inside the internal member. It may be a one-way type where the part is the fluid inflow part and the external force part is the fluid outflow part, or it may be a reciprocating type consisting of an outgoing path and a return path.The heating heater is made of a ceramic base material, for example. Formed by wrapping the element.

[Example J Figures 1 and 3 show cross-sectional views of fluid heating heater devices according to the first and second embodiments, and these heater devices are nozzle heaters of oil burners.

In FIG. 1, a large diameter hole 2 is formed inside a cylindrical outer member 1, and a cylindrical inner member 3 is accommodated in this large diameter hole 2. As shown in FIG. A small diameter hole 5 connected to the large diameter hole 2 via a communication hole 4 is provided inside the tip side of the external member 1, and a threaded portion 6A of a nozzle 6 is inserted and screwed into this small diameter hole 5, which is a threaded hole. As a result, the nozzle 6 is attached to the tip of the external member 1.

A camp member 7 is attached to the rear end of the outer member 1, so that the tip of the inner member 3 comes into contact with the step 8 between the large diameter hole 2 and the communication hole 4, and the rear end contacts the cap member 7. By abutting, the inner member 3 is positioned and fixed inside the outer member 1.

A hole 9 is also provided inside the internal member 3, and a heating heater 10 is inserted into this hole 9. Heating heater 10
is constructed by embedding a heating element 12 made of a heating wire, a film heater, etc. inside a ceramic base material 11, and a guide hole 13 for leading out the lead wire of the heating element 12 is formed in the camping member 7. ing.

A fin 14 is integrally formed on the outer peripheral surface of the internal member 3, and the fin 14 extends from the flange portion 1 from the tip to the rear end of the internal member 3.
It has a spiral shape that is continuously formed up to the vicinity of 5.

The outer diameter dimension of the inner moon 3 including the height of the helical fin 14 matches the hole dimension of the large diameter hole 2 of the outer member 1, and therefore the outer diameter of the outer member 1
When the internal member 3 is housed inside, the spiral fin 14 is interposed between these members 1.3, and the spiral fin 14 is in contact with both members 1.3.

Therefore, a spiral passage 16 whose periphery is sealed by the spiral fins 14 is provided between the outer member 1 and the inner member 3.

FIG. 2 shows the shape of the internal member 3 including the spiral fins 14, which are formed by a pair of parallel spiral protrusions 14A.
, 14B. Spiral protrusion 14A
, 14B are apart from the flange portion 15, the spiral passage 16 consists of an outgoing path 16A and a backward path 16B connected at the rear end side of the inner member 3, and the spiral path 16 is a reciprocating path having a folded portion 17. It's shaped.

The end of the outgoing path 16A on the tip side of the internal material 3 is blocked by a built-up part made of brazing, etc., so when oil is supplied to the outgoing path 16A, the oil does not flow to the tip side of the internal material 3. It flows toward the rear end.

The end 18 of the return path 16B on the tip side of the internal member 3 is opened,
Therefore, the oil that has reached this end 18 flows out to the tip side of the internal member 3.

As shown in FIG. 1, a tube member 19 that reaches the large diameter hole 2 is attached to the external member 1, and the attachment position of this tube member 19 is the same as the outward path of the spiral passage 16. Corresponding to the position of the starting end 20 in 6A,
Thereby, a fluid inlet 21 for supplying oil to the spiral passage 1816 is provided in the outer member 1.

Oil flows into the spiral passage 16 from the piping connected to the fluid inlet 21.
This oil flows through the outward path 16A and reaches the turning section 1.
7, after which it passes through the return route 16B and this return route 16B.
It flows out from the end 18 into the communicating hole 4 shown in FIG. The oil accumulated in the communication hole 4 is removed through a nozzle 6 protruding into the small diameter hole 5.
The liquid enters the filter part 6B and is ejected from the ejection hole at the tip of the nozzle 6.

While the oil is flowing through the spiral passage 16, it is heated by the heating heater 10 via the internal member 3, and the preheated oil is ejected from the nozzle 6 and ignited by an ignition device (not shown), causing combustion. do.

The passage 16 through which oil flows has a spiral shape and is long, so that efficient heating can be achieved. Particularly in this embodiment, since the spiral passage 16 is a reciprocating type consisting of an outward path 16Δ and a backward path P 1.6 B, the heating efficiency is further improved. ' Also, since the inner member 3 is housed inside the outer member I and the heating heater 10 is arranged inside this inner member 3, the overall structure can be made compact. Therefore, external material 1
and the cylindrical case provided on the outside of the external member l, the opening area of the m-cavity can be made sufficiently large;
The amount of oil combustion air supplied through this wind tunnel can be increased.

Furthermore, since the nozzle 6 and the heating heater 10 are arranged close to each other, the heated oil is not immediately jetted out from the nozzle 6 and cooled.

Furthermore, the heater element 12 of the b+l heater 10
is not placed directly inside the internal material 3, but is placed surrounded by the ceramic base material 11, so that uniform heating of the oil can be achieved by heating the entire base material 11 without creating a temperature gradient. .

The embodiment shown in FIG. 3 differs from the embodiment shown in FIG. 1 in the method of supplying oil to the spiral passage. The same members and parts as described above are given the same reference numerals.

A hole 23 for inserting a fluid supply vibrator 22 for supplying oil is formed through the heating heater 10 in the axial direction, so that a fluid supply pipe 22 is inserted inside the internal member 3.
is provided. The tip of this vibrator 22 faces a chamber 24 formed inside the internal member 3, and the chamber 24 is connected to the starting end 20 of the outward path 16A of the spiral passage 16 via a hole 25.

Therefore, the internal passage of the fluid supply pipe 22 is connected to the spiral passage 16 via the chamber 24 and the hole 25.

The rear end of the fluid supply pipe 22 is inserted into the through hole 26 of the cap member 7, and the fluid flows into the vibrator 22 from the piping connected to the through hole 26.

According to this embodiment, the ura is supplied from the cap member 7 on the rear end side of the outer 10-hole, and there is no need to provide piping protruding toward the outer 1-hole on the outer 4'1, so that the outer 4'1 is even more compact as a whole. -, and the open area of the wind tunnel can be made larger. Furthermore, compared to the embodiment shown in FIG. 1, the area where oil flows and is electrically heated increases by the amount of the fluid supplying vibrator 22, etc., so that the heater efficiency is further improved.

Next, the experimental results will be explained based on the table.

This experiment was conducted on heavy oil with a specific gravity of 0.85, specific po, and 4s. Experimental data 1 to 9 are for the nozzle heater according to the embodiment shown in FIG. 3, and experimental data 10 to 12 are for the nozzle heater according to the embodiment shown in FIG. Comparison data 1 and 2 are for the nozzle heater in which an oil flow pipe is wound around the heater as described in the prior art.
The outside of the LKRM tube was coated with aluminum material. Comparison data 3 to G are the same (bronze ball and P described in the conventional technology)
This is about a nozzle heater using a TC element. In the table, preheat time is the heating time until the oil is first jetted from the nozzle. )]! ', Ii spouting oil temperature is the temperature when oil spouts from the nozzle after the preheating time has elapsed! 111 QA.

The fourth graph is a graph of the heater efficiency shown in the table in relation to the oil amount. A is experimental data 1 to 9, B is experimental data 10 to 12, C is comparative data 1 and 2, and D is comparative data 3 to G. As is clear from this graph, Figure 1,
The nozzle heater according to the embodiment shown in FIG. 3 has improved heater';,'y;6 compared to the conventional product. In other words, the above-mentioned heater efficiency shows that if the oil temperature is kept constant, then the temperature rise can be made larger than that of conventional products.

Next, experimental data 3 and comparison data 1 with almost the same amount of oil.
First time about i! Considering the Il eruption temperature, the electric energy of experimental data 3 is 240 watts and the electric energy of comparative data 1 is 150 watts, but even though the breathing time of experimental data 3 is 30 seconds. The first jetted oil temperature was 45.4°C, and on the other hand, even though the breathing time in Comparison Data 1 was 180 seconds, the initial jetted oil temperature was only 43°C. This shows that the initial ejected oil temperature of the nozzle heater according to the example can be made much higher than that of the conventional product if the breathing time is kept the same.

A higher initial ejected oil temperature means that the viscosity of the oil is lower and that the cone-shaped diffusion of the oil when ejected from the nozzle is better, thus improving the ignitability. The nozzle heater according to the embodiment can reduce the initial 1υ1 ejected oil temperature to yM high temperature, so even though it is viscous, the heavy Tr
Even if it's oil, you can reliably burn it, burn it, or burn it, and the environment temperature is low - Cold 11+! - Achieve effective 6σ ignition and combustion of heavy oil. As mentioned above, ignition and combustion are possible due to the heating in the spiral passage, so heating should be done at the piping section (line heater).
is not necessary.

Furthermore, the nozzle heater according to the embodiment has an oil flow similar to that of a brochure and a ball, and does not have an oil flow through it. Unlike the conventional product installed in the h/m path, there is no sagging or loss of force, so the amount of oil can be larger than the conventional product under the same nozzle diameter and the same oil pressure condition 1.

The present invention can also be made into a multiple nozzle heater by housing a plurality of internal members inside an external member. In addition, although the above-mentioned preferred embodiment was a case of a nozzle heater of an oil burner, the upper heater device for fluid IJo heat according to the present invention is not limited to the nozzle heater of an oil burner, but also any other device that heats a fluid, such as It can also be applied to a heater device for heating oil to pass through a strainer before the strainer in oil piping.

〔Effect of the invention〕

According to the present invention, the efficiency of the heater increases and effective use of thermal energy can be achieved, and when used as a nozzle heater for an oil burner, it is possible to ignite and burn even heavy oil with high viscosity. become.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the interior of the heater device according to the first embodiment (14 structure), Fig. 2 is a diagram showing the shape of the internal material, and Fig. 3 is the internal structure of the heater device according to the second embodiment. The cross-sectional view shown in FIG. 4 is a graph without showing the experimental result 7T. 1... External material, 3... Internal material, 6... Nozzle, 1
0... jMI 2J ~ heater, 11... base material,
12... Heater element, 14... Spiral fin, 16... Iridescent path, 21... Fluid inlet, 22...
・Fluid supply pipe.

Claims (6)

[Claims] (1) The internal material is housed inside the external material, a heating heater is arranged inside the internal material, and a spiral fin is placed between the internal material and the external material in contact with the internal material and the external material. A heater device for heating a fluid, characterized in that the spiral fins form a spiral passage through which the fluid heated by the heating heater flows. (2) The heater device for heating a fluid according to claim 1, wherein the external member is provided with a fluid inlet for allowing fluid to flow into the spiral passage. (3) In claim 1, a fluid supply pipe is provided inside the internal member, and the internal passage of the fluid supply pipe is connected to the spiral passage through a hole formed in the internal member. A heater device for heating a fluid, characterized in that the heater device is connected to a heater device. (4) The heater device for heating a fluid according to any one of claims 1 to 3, wherein the spiral fin is a multi-fin structure, and the spiral passage includes an outgoing path and an incoming path. . (5) The fluid heating heater device according to any one of claims 1 to 4, wherein the heating heater is formed by wrapping a heater element in a ceramic base material. (6) In any one of claims 1 to 5, the fluid is oil, and a nozzle for spouting ignited oil is attached to the tip of the external member, and the nozzle heater of the oil burner A heater device for heating a fluid, characterized by: