JPH02208405A - Combustion type room-heating device - Google Patents

Abstract

PURPOSE:To raise the efficiency of vaporization of a liquid fuel in a title device such as a hot storage vehicle by forming in one body on the contact face of the absorption body of a fuel absorption body holder, a heat receiving section which consists of a projection section that projects into a combustion chamber through an absorption body and a recess section formed in the projection. CONSTITUTION:At a contact face 7d of the fuel absorption body 6 of a holding member 7 which forms a fuel route 7c a heat receiving section 70 which holds the holding member 7 at a high temperature by receiving the heat of the flame generated in a combustion chamber 3 is formed as one body. This heat receiving section 70 is constituted of an annular projection section 71 which projects into the combustion chamber 3 through a hole 6a pierced substantially in the center of the fuel absorption body 6, and a central projection section 73 which forms an annular recess section 72 on the inside of the projection section 71. In this constitution, since the combustion of the flame in the combustion chamber 3 is received by the projection section 71 and recess section 72 which have a large surface, the heat absorption effect is improved and the vaporization of the fuel is promoted.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is a combustion type heating device installed in a vehicle such as a heated vehicle, and in particular, it vaporizes liquid fuel supplied to a fuel absorber. The present invention relates to a combustion type heating device that ignites and burns a mixture of the vaporized liquid fuel and combustion air in a combustion chamber.

(Prior Art) The combustor of such a conventional combustion type heating device has, for example, a fuel absorber provided in a combustion chamber in a combustion cylinder, and a fuel absorber is provided on an end surface of the absorber on the side opposite to the combustion chamber. A part of the holding member that holds the absorber in contact with the fuel absorber is exposed into the combustion chamber through a hole drilled in the fuel absorber, and a part of the holding member has a conductor with good heat conductivity that protrudes into the combustion chamber. A heating member is attached, and the holding member is heated by the heat transfer member receiving the combustion heat of the flame generated in the combustion chamber, thereby promoting vaporization of the liquid fuel supplied to the fuel absorber. Yes (Japanese Unexamined Patent Publication No. 164108/1983).

(Problem to be Solved by the Invention) However, in the conventional example described above, since the heat transfer member, which is a separate member from the holding member, is attached to the holding member, the number of parts increases and the number of processing and assembly steps increases. In addition, since the heat transfer member is attached to the holding member, it is not possible to increase the surface area by increasing the thickness of the heat transfer member, which reduces the heat absorption effect of the heat transfer member. Therefore, there is a problem that the temperature of the holding member cannot be sufficiently increased and the vaporization of the liquid fuel cannot be sufficiently promoted.

The present invention was made in view of these conventional problems, and an object of the present invention is to provide a combustion heating device that can sufficiently promote the vaporization of liquid fuel and is inexpensive to manufacture.

(Means for Solving the Problems) In order to achieve the above object, the combustion type heating device according to the present invention includes a fuel absorber provided in a combustion chamber in a combustion cylinder;
It has a fuel passage that guides the liquid fuel to the absorber, and a holding member that holds the absorber by contacting the end surface of the absorber on the side opposite to the combustion chamber, so that the liquid fuel supplied to the absorber glows. In a combustion type heating device in which a mixture of the vaporized liquid fuel and combustion air is vaporized by a plug and ignited and combusted by a glow plug in a combustion chamber, the holding member is in contact with the absorber. A heat receiving portion having a convex portion penetrating the absorber and protruding into the combustion chamber and a recess formed inside the convex portion is integrally formed on the contact surface.

Further, in order to achieve the above object, in the combustion type heating device according to the present invention, on the contact surface of the holding member with the absorber,
A convex portion that penetrates the absorber and projects into the combustion chamber is integrally formed, and a heat-resistant black paint is applied to the surface of the convex portion to form a heat receiving portion.

(Function) In the above-mentioned combustion type heating device according to the present invention, the heat receiving section receives the combustion heat of the flame on the entire surface of the convex portion having a large surface area and the four parts, so that the heat absorption effect in the heat receiving section is large.
The temperature of the holding member is sufficiently increased.

Further, in the above-mentioned combustion type heating device according to the present invention, since the heat receiving part absorbs the combustion heat of the flame with the black paint, the heat absorption effect in the heat receiving part is large, and the temperature of the holding member can be raised more sufficiently.

(Example) Hereinafter, each example of the present invention will be described based on the drawings. In addition, in the description of each embodiment, similar parts are given the same reference numerals and redundant description will be omitted.

FIG. 1 is a longitudinal cross-sectional view showing a combustion type heating device according to a first embodiment of the present invention. It is made up of a combustor 1 and a heat exchanger 2.

The combustor 1 includes a combustion tube 4 whose interior becomes a combustion chamber 3, a heat insulation tube 5 fitted to the outer periphery of the combustion tube 4, a disk-shaped fuel absorber 6 formed of ceramic fiber, and a holding member. 7 and case 8.

One end of the combustion tube 4 is closed with a fuel absorber 6 fitted to the inner periphery of one end of the heat insulation tube 5, and the other end of the combustion tube 4 is closed with a combustion chamber 3.
An opening 4a is formed through which the flame generated therein and its combustion gas pass. A large number of air inflow holes 4b are bored in the peripheral wall of the combustion cylinder 4, and the air inflow holes 4 are also provided in the peripheral wall of the heat insulation wJ5.
An air inflow hole is bored at a position corresponding to b, and combustion air supplied into the air passage 9 from a combustion air supply blower (not shown) flows through the air inflow hole 4b of the heat insulation cylinder 5 and the combustion cylinder 4.
The fuel is introduced into the combustion chamber 3 through the combustion chamber 3.

A flange 5a formed on the other end side of the heat insulating tube 5 is fixed to mounting portions 8a formed at a plurality of locations on the case 8 with bolts 10.

One end 7a of the holding member 7 is connected to the end of the case 8 so that the holding member 7 comes into contact with m end faces (end faces on the opposite side of the combustion chamber) of the fuel absorber 6 and holds the absorber 6 between one end of the combustion tube 4. It is fixed with bolts 11 to mounting portions 8b formed at a plurality of locations in the heat retaining cylinder 5, and the outer circumferential surface 7b on the other end side fits into the inner circumference on the one end side of the heat retaining cylinder 5. A fuel passage 7c for guiding liquid fuel to the fuel absorber 6 is formed in the holding member 7, and a fuel supply pipe (not shown) is connected to an end of the passage 7c. Fuel absorber 6 of holding member 7
As shown in FIGS. 1 and 2, the contact surface 7d with the
The holding member 7 receives the combustion heat of the flame generated in the combustion chamber 3.
A heat receiving part 70 for maintaining the holding member 7 at a high temperature is integrally molded with the holding member 7. The heat receiving portion 70 penetrates through a hole 6a formed approximately in the center of the fuel absorber 6 and enters the combustion chamber 3.
An annular convex portion 71 that protrudes inward, and a convex portion 7 that protrudes from the center! A central convex portion 73 forming an annular concave portion 72 inside the
It consists of.

A glow plug 12 and an ignition sensor 13 are each removably attached to the peripheral wall 8c of the case 8. The ignition part 12a of the glow plug 12 and the flame detection part 13a of the ignition sensor 13 each protrude into the combustion chamber 3, as shown in FIG.

The heat exchanger 2 includes a combustion pipe 14 into which the flame generated in the combustion chamber 3 of the combustor 1 and its high temperature combustion gas are introduced.
have. The combustion tube 14 is a cylinder with both ends open.
The flange 14a at one end thereof is fixed to the mounting portion 8a of the case 8 together with the flange 5a of the heat insulating cylinder 5 with bolts 1O.

On the outside of the combustion tube 14, the cylindrical portion 8d of the case 8 extends to the outside from the other end 14b of the combustion tube 14, and there is a gap between the outer peripheral surface of the combustion tube 14 and the inner peripheral surface of the cylindrical portion 8d. , combustion tube 1
Combustion gas passage A through which combustion gas exits from the other end 14b of 4.
is formed. The case 8 is formed with an exhaust port 8e for discharging the combustion gas that has passed through the combustion gas passage A to the outside.

The outside of the cylindrical portion 8d of the case 8 has an air population 15a through which heating air (cold air) from inside the hot storage is introduced, and a heating air passage B is formed between the outer peripheral surface of the cylindrical portion 8d. A forming case 15 is arranged. One end 15b of this case 15
is fixed to the mounting portion 8f of the case 8 with bolts 16. A duct I7 is provided on the outer peripheral surface of the other end 15c of the case 15.
The end portion 17a of is fixed with a bolt 18. The duct 17 includes a passage C communicating with the heating air passage B, and an outlet 17 for blowing out warmed heating air (warm air).
b, and a wind guide surface 17c that directs the combustion gas exiting from the other end 14b of the combustion f14 to the combustion gas passage A.

Furthermore, a plurality of fins 19 are protruded from the inner circumferential surface of the cylindrical portion 8d at equal intervals in the circumferential direction, so that the combustion gas passing to the combustion gas passage and the cylindrical portion 8d are efficiently It is designed to exchange heat. Furthermore, a plurality of fins 20 are protruded from the outer circumferential surface of the cylindrical portion 8d at equal intervals in the circumferential direction, and while the heating air taken in from the air inlet 15a passes through the heating air passage B, Heat is exchanged efficiently with the cylindrical portion 8d.

Hereinafter, the operation of the combustion type heating device having the above configuration will be explained.

When an operation unit (not shown) is turned on to start heating the refrigerator, combustion air is passed through the air inlet holes 4b of the air passage 9, heat retaining cylinder 5, and combustion cylinder 4 by a blower (not shown), and is combusted. While being introduced into the chamber 3, liquid fuel is supplied to the fuel absorber 6 through a fuel supply pipe (not shown) and a fuel passage 7C of the holding member 7, and is temporarily impregnated into the fuel absorber 6. When a voltage is applied to the glow plug 12 and its ignition part 12a becomes high temperature, the liquid fuel impregnated in the fuel absorber 6 vaporizes and a mixture of the vaporized liquid fuel and combustion air flows into the combustion chamber 3. ignites and produces a flame.

This flame and its high-temperature combustion gas are introduced into the combustion tube 14 from the combustion chamber 3. This combustion gas is transmitted through combustion pipe J4,
The combustion gas passes through the combustion gas passage A and is discharged to the outside from the exhaust port 8e. While the combustion gas passes through the combustion gas passage A, the cylindrical portion 8
d becomes hot due to heat exchange with the combustion gas.

On the other hand, the heating air from inside the hot storage enters into the heating air passage B from the air inlet 15a of the case 15, and while passing through the passage B, heat is exchanged with the hot cylindrical part 8d and warmed. The warmed heating air passes through the passage C in the duct 17, blows out from the outlet 17b, and is introduced into the hot storage via a duct (not shown), thereby warming the inside of the hot storage.

In addition, the heat receiving portion 70 of the holding member 7 receives the combustion heat of the flame generated within the combustion chamber 3 on the entire surface of the convex portions 71 and the concave portions 72, which have large surface areas, so that the heat absorbing effect in the heat receiving portion 70 is large. Therefore, the temperature of the holding member 7 is sufficiently increased, and the heat of the holding member 7 is applied to the fuel absorber 6 that is in contact with it.
As a result, the temperature of the absorber 6 becomes sufficiently high, thereby promoting vaporization of the liquid fuel impregnated in the fuel absorber 6. As a result, combustion efficiency within the combustion chamber 3 is improved, and less carbon adheres to the inner peripheral surface of the combustion tube 14 and the surface of the fins 19. Furthermore, since the combustion efficiency is improved, the temperature of the combustion gas generated within the combustion chamber 3 becomes higher, and therefore the heat exchanger 2 can be made smaller by that much.

Further, according to the above embodiment, the heat receiving portion 70 is provided integrally with the contact surface 7d of the holding member 7, so that the number of parts increases and processing and processing are required to provide the heat receiving portion 70. There is no increase in assembly man-hours. Therefore, the manufacturing cost is the same as when the heat receiving section 70 is not provided.

Further, according to the above embodiment, since the annular convex portion 71 of the heat receiving section 70 penetrates approximately through the center of the fuel absorber 6, the liquid fuel supplied to the fuel absorber 6 from the fuel passage 7c is It does not fall straight inside the fuel absorber 6, but falls inside the fuel absorber 6 so as to go around the outer periphery of the annular convex portion 71 as shown by the arrow in FIG. As a result, the liquid fuel is diffused over the entire surface of the fuel absorber 6, and the distance that the liquid fuel falls within the fuel absorber 6 becomes longer, so that this action also promotes vaporization of the liquid fuel.

Next, a second embodiment of the present invention will be described based on FIGS. 3 and 4.

In this second embodiment, a large number of ribs 71a are formed on the inner peripheral surface of the annular convex portion 71 of the heat receiving portion 70 to increase the surface area of the heat receiving portion 70, thereby increasing the heat absorption effect in the heat receiving portion 70 as described above. This is even higher than the first embodiment.

Therefore, according to the second embodiment, the vaporization of the liquid fuel impregnated in the fuel absorber 6 is further promoted than in the first embodiment because the surface area of the heat receiving portion 70 is increased. Note that the other configurations and functions of this second embodiment are the same as those of the first embodiment.

Next, a third embodiment of the present invention will be described based on FIGS. 5 and 6.

In this third embodiment, an annular protrusion 74 is formed inside the annular protrusion 71 of the heat receiving section 70 in the first embodiment, and a four-part 72' is also formed inside the protrusion 74. As a result, the surface area of the heat receiving section 70 is increased, thereby further enhancing the heat absorption effect in the heat receiving section 70 compared to the first embodiment. Therefore, according to the third embodiment, the surface area of the heat receiving section 70 is increased. The vaporization of the liquid fuel impregnated into the fuel absorber 6 is further promoted as compared to the first embodiment.

Next, a fourth embodiment of the present invention will be described based on FIG.

In this fourth embodiment, a circular convex portion 75 that penetrates the fuel absorber 6 and projects into the combustion chamber 3 is formed on the contact surface 7d of the holding member 7 with the fuel absorber 6. The heat receiving portion 70 is formed by applying a heat-resistant black paint 76 to the surface of the convex portion 75.

According to this fourth embodiment, the heat receiving section 70 has a black paint 76.
Since the combustion heat of the flame is absorbed by the heat receiving part 70, the heat absorption effect in the heat receiving part 70 is large. Therefore, the temperature of the holding member 7 is sufficiently increased, and the heat of the holding member 7 is transmitted to the fuel absorber 6 in contact with the holding member 7, so that the temperature of the absorber 6 becomes sufficiently high. This promotes vaporization of the liquid fuel impregnated in the fuel absorber 6.

In addition, if the black paint 76 is applied to the surface of each of the heat receiving parts 70 of the first to third embodiments, the heat absorption effect in each of the heat receiving parts 70 will be further increased, and the vaporization of the liquid fuel will be further promoted. Ru.

(Effects of the Invention) As detailed above, the combustion type heating device according to the present invention includes a fuel absorber provided in the combustion chamber in the combustion cylinder and a fuel passage for guiding liquid fuel to the absorber. and a holding member that holds the absorber by contacting the end surface of the absorber on the side opposite to the combustion chamber, and the liquid fuel supplied to the absorber is vaporized by the glow plug, and the vaporized liquid fuel and In a combustion type heating device in which an air-fuel mixture with combustion air is ignited and combusted by a glow plug in a combustion chamber, the holding member described in 01j has a contact surface with the absorber that penetrates the absorber. Due to the structure in which a heat receiving part having a convex part protruding into the combustion chamber and a concave part formed inside the convex part is integrally formed, the heat receiving part can cover the entire surface of the convex part and the concave part having a large surface area. Since the heat receiving part receives the combustion heat of the flame, the heat absorption effect at the heat receiving part is large. Therefore, the temperature of the holding member is sufficiently raised, and the heat of the holding member is transmitted to the absorber in contact with it, and the temperature of the absorber becomes sufficiently high, thereby causing the absorber to The vaporization of the liquid fuel impregnated in the fuel can be sufficiently promoted, and as a result, the combustion efficiency can be improved. Also,
Since the heat receiving portion is integrally formed on the contact surface of the holding member, the number of parts may increase in order to provide the heat receiving portion.
Since the number of processing and assembly steps does not increase, the manufacturing cost for providing the heat receiving section can be reduced.

Further, according to the combustion type heating device according to the present invention, a convex portion that penetrates the absorber and projects into the combustion chamber is integrally formed on the contact surface of the holding member with the absorber, and With the structure in which the heat-receiving part is formed by applying heat-resistant black paint to the surface of the convex part, the heat-receiving part absorbs the combustion heat of the flame with the black paint, so the heat absorption effect in the heat-receiving part is large. Therefore, the temperature of the holding member is sufficiently increased, and the heat of the holding member is transmitted to the absorbent body in contact with the holding member, and the temperature of the absorbent body becomes sufficiently high, whereby the absorbent body is impregnated. It is possible to sufficiently promote the vaporization of the liquid fuel contained in the fuel, and as a result, the combustion efficiency can be improved.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention,
Figure 1 is a longitudinal sectional view showing the combustion type heating device, Figure 2 is M1
3 and 4 show the second embodiment of the present invention, FIG. 3 is a sectional view showing the main part, and FIG. 4 is a view in the direction of the 5 and 6 show a third embodiment of the present invention, FIG. 5 is a cross-sectional view showing the main part, FIG. 6 is a view from the direction of arrow V in FIG. FIG. 4 is a cross-sectional view showing the main parts of the fourth embodiment. 3... Combustion chamber, 4... Combustion cylinder, 6... Fuel absorber, 7... Holding member, 7c... Fuel passage, 7d... Contact surface, 12... Glow plug, 70...Heat receiving part, 7
1.74...Convex part, 72.72'...Concave part, 75...
・Protrusion, 76...black paint. Applicant: Diesel Equipment Co., Ltd.

Claims (1)

[Claims] 1. A fuel absorber provided in a combustion chamber in a combustion cylinder, and a fuel passage for guiding liquid fuel to the absorber, the fuel passage being in contact with an end surface of the absorber on the side opposite to the combustion chamber. and a holding member that holds the absorber, liquid fuel supplied to the absorber is vaporized by a glow plug, and a mixture of the vaporized liquid fuel and combustion air is ignited by the glow plug in the combustion chamber. In the combustion type heating device, the holding member has a convex portion that penetrates the absorber and projects into the combustion chamber on the contact surface with the absorber, and an inner side of the convex portion. A combustion type heating device characterized in that a heat receiving part having a recess formed therein is integrally formed. 2. It has a fuel absorber provided in the combustion chamber in the combustion cylinder and a fuel passage that guides liquid fuel to the absorber, and holds the absorber by coming into contact with the end surface of the absorber on the side opposite to the combustion chamber. and a holding member, so that the liquid fuel supplied to the absorber is vaporized by the glow plug, and a mixture of the vaporized liquid fuel and combustion air is ignited and combusted by the glow plug in the combustion chamber. In the combustion heating device, a convex portion that penetrates the absorber and projects into the combustion chamber is integrally formed on a surface of the holding member that comes into contact with the absorber, and a surface of the convex portion is provided with a heat-resistant material. A combustion type heating device characterized in that a heat receiving part is formed by applying black paint.