JP2883559B2 - Gas fired furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a gas-fired furnace for cooking various foods.

[0002]

2. Description of the Related Art In a conventional gas-fired furnace, the relationship is set such that a gas flame rising from a gas burner directly hits the bottom of a pot. In addition, the wall of the furnace surrounding the bottom surface and the body surface of the pot is formed as a heat-storing heat-insulating layer such as asbestos, so that high heat efficiency is generally expected.

[0003]

However, in the above configuration, incomplete combustion is apt to occur because the gas flame directly hits the bottom of the pot, and the bottom of the pot and the inner surface of the wall of the furnace do not easily come into contact. , Soot is deposited and deposited early.

However, if the gas burner is far away from the bottom surface of the pot, the radiant heat transfer is taken by the heat storage heat insulating layer and stored, so that the heat is efficiently applied to the bottom surface of the pot. Instead, the thermal efficiency becomes worse and the gas consumption increases.

[0005] Further, since the gas flame directly hits the bottom of the pot, the food stored in the pot is easily burned, and the heat storage heat-insulating layer is hard to cool. Automatic mechanical control is also very difficult.

[0006] In particular, in the case of foods of which properties are required, such as grain bean jam, not only burning but also crushing of the grains are not allowed. I have to do it.

In addition, in the case of foods containing sugar as a raw material, the high heating temperature required to chemically change the sugar into reducing sugar, despite the fact that the taste of the food is determined, is determined. Can not keep. This is because they will cover and burn the food before that.

Further, the heat storage heat-insulating layer stops the heat of the gas burner, but does not cool down quickly, so that there is a great risk of burns. In addition, the boiled food burns on the surface of the wall of the furnace and becomes unsightly dirty. It will also be.

[0009]

SUMMARY OF THE INVENTION The present invention aims to improve such a problem, and surrounds the pot in a configuration for that purpose.
Cross-section of substantially inverted U-shape The shaped rigid stove body wall
The inner surface is made of ceramic fiber that is easy to heat and cool
Non-heat storage outer insulation layer
Molded into a conical shape with a bottom that roughly corresponds to the bottom of the pot
The non-heat storage inner heat insulation layer
By fitting and fixing it inside,
The inner space is a combustion chamber, and the inner insulation layer and the outer
If the area between the thermal layer and the thermal layer is classified as an exhaust jacket,
Through a large number of exhaust holes distributed through the inner insulation layer
The exhaust duct communicating with the combustion chamber
While letting it go out from the body surface,
The flame of the combustion gas hits the bottom of the pan directly
The gas burner.
Radiated heat from the pan to the pan
And make it reflect toward the bottom of the pot
In a gas-fired gas furnace,

First, the lower surface of the exhaust jacket is closed.
Sera that is easy to heat and cool to the bottom plate of the wall of the furnace
Non-thermal storage insulation mat made of mic fiber etc.
The backing is integrated, and a large number of
While distributing the open air intake holes, the inside of the exhaust duct
Non-heat storage surface also made of ceramic fiber etc.
Lining with a thermal insulation layer and its exhaust duct
Characterized in that an outside air intake hole is formed in the bottom of the

Second, the inner surface of the exhaust duct may be heated.
Non-storage made of ceramic fiber etc.
The thermal insulation layer is integrated with the backing, and the exhaust
The outside air intake hole is formed in the bottom of the
The bottom of the racket was fully opened as the outside air intake port.
It is a sign.

[0012]

According to the above construction of the present invention, the gas burner is connected to the pot.
The flame of the combustion gas directly hits the bottom of the pot.
Is installed at a certain distance away from the pan.
Burning food in containment or incomplete combustion of gas
There is no danger.

Further, the flame of the combustion gas directly hits the bottom of the pot.
Even if a certain distance is left, the furnace wall
The thermal layer is formed as a double structure of inner and outer heat insulating layers,
Of non-woven fabric such as ceramic fiber
Made of conventional asbestos because it is made of heat storage insulation
Unlike the heat storage heat insulation layer, the gas burner
It does not absorb the radiant heat transfer and absorbs it.
Due to the conical body surface of the non-heat storage inner heat insulation layer almost corresponding to
The bottom of the pot can be directionally reflected without loss.
Very high thermal efficiency and gas waste
It can be prevented.

Furthermore, the above non-heat storage property which is easy to heat and cool.
Between the inner and outer insulation layers with
Is formed separately from the combustion chamber, and the exhaust
On the bottom plate of the furnace body wall that closes the lower surface of the jacket,
Again, non-heat storage insulating mat is integrated with backing
On the other hand, the inner surface of the exhaust duct communicating with the exhaust jacket
Also, a non-heat storage heat insulating layer is integrated with the backing
You.

Then, the bottom plate and its heat insulating mat are exhausted.
Many open air intake holes to the air jacket are distributed
In addition, the bottom of the exhaust duct also absorbs outside air
Since the opening is formed, the inside of the combustion chamber is cut off.
To the exhaust jacket through exhaust holes distributed in the thermal layer
The exhaust gas that has been exhausted is drawn out toward the exhaust duct.
Freshness that is inhaled by the flow force
Extremely efficient cooling with natural outside air
The temperature of the exhaust gas from the chimney
I can do it.

Moreover, the heat insulating layer on the wall of the furnace body is non-thermal.
The inner and outer heat insulating layers form a double structure,
The thermal insulation mat is integrated with the backing,
A non-heat storage heat insulation layer is also integrated on the inner surface of the air duct.
If the gas burner is turned off,
Will quickly cool down, and as a result these
The surface can be cleaned beautifully without danger of burns.
Because

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
In other words, FIGS. 1 to 6 show the gas-fired furnace.
(A) is a rigid furnace main body wall, and a metal plate (preferably
Preferably stainless steel plate) or other refractory material,
The cross section surrounding (10) is shaped almost U-shaped
You.

(11) is the upper surface of the furnace main body wall (A)
It is a pan receiving opening established in the center.
The part is bent and raised as a spillover prevention flange (12)
In this way, the furnace body wall (A) and the pot (10) interact
Food broth does not flow down unsightly through the gap
Swelling.

(B) is also on the furnace body wall (A)
Exhaust ducts run from the upper part of the
In the illustrated embodiment, the furnace wall (A) faces outwardly.
The overhanging base (13) is connected to the base (13).
With an enclosed chimney (14), but its overall
Of course, it may be embodied as one metal tube or the like.

Further , (15) is provided on the wall (A) of the furnace main body.
Inward from the lower part of the body surface
The support ring, which is the furnace wall from below
(A) The same bottom plate (16) of refractory material and a plurality of
The stand (17) is connected via bolts (not shown ).
It is fixed.

However, gas is located at the center of the bottom plate (16).
A burner inlet (18) has been opened. Above
From the bottom of the wall (A) to the gas burner described later
If combustion air can be taken in, install it
The installation of the stand (17) may be omitted.

(19) Heating of the furnace main body wall (A)
Non-thermal storage insulation layer that is easy to cool
Or melt at high temperature with alumina and silica as main components.
Consisting of fiberized ceramic fibers,
In particular, the inner heat-insulating layer (19a) and the outer heat-insulating layer (19b)
Formed in a double structure.

That is, the outer heat insulating layer (19b)
The above-mentioned ceramic fiber is considered to be soft and thick.
From the above, and the above
Stick to the inner surface of the wall (A) in the backing state
Has been

On the other hand, the inner heat insulating layer (19a) is shown in FIGS.
As a relatively hard and thin-walled fired body to be extracted,
Molded by adding a binder to ceramic fiber,
The molded body is fired in a drying furnace after vacuum dehydration.
You.

Then, the inner cut as a molded / fired body is formed.
The heat layer (19a) moves to the inside of the outer heat insulation layer (19b).
By being fitted and fixed, the inner heat insulating layer (19)
The internal space of a) is a combustion chamber (R), and
The space between the thermal layer (19a) and the outer heat insulating layer (19b) is up.
A constant exhaust jacket communicating with the exhaust duct (B)
Each of them is classified as (S).

Further , the inner heat insulating layer (19a) is a pot
Formed into a conical shape with a downward taper that almost corresponds to the bottom surface of (10).
Radiant heat transfer from a gas burner described later
Is placed in a pan by the conical body surface (19a-1) of the lower half.
(10) Directional reflection to the bottom surface without loss , gas thermal efficiency
It is determined to be able to exalt.

(20) is applied to the inner heat insulating layer (19a).
Opening distribution on the cylindrical body surface (19a-2) of the upper half
Numerous exhaust holes with almost the same diameter
However, especially the aperture distribution state is suggested from the developed view of FIG.
As shown in the figure, in the vicinity corresponding to the exhaust duct (B)
Rough pitch (P1) and its exhaust duct (B)
The finer the pitch (P2) gradually, the further away
Differences have been changed.

[0028] Thereby, the effective action on the pot (10) is achieved.
Quick to reach the exhaust duct (B)
Prevents the gas from being drawn out and increases the thermal efficiency of the gas
This is the purpose. In that sense, FIG.
As is apparent from the example, the pitch of the exhaust hole (20) is
H (aperture distribution state) as a whole
A small diameter (D) near the air duct (B)
1) and gradually as the distance from the exhaust duct (B) increases.
Even if the diameter is changed differently as a large diameter (D2)
Alternatively, it may be used in combination with the configuration shown in FIG.

(21) is a circle of the inner heat insulating layer (19a).
Sleeve receiving cut off on cone surface (19a-1)
Missing, (22) the above furnace so that it corresponds to this
Penetratingly formed in the main body wall (A) and the outer heat insulating layer (19b)
A viewing window, the viewing window (22) and the sleeve receiver
Also between the notch (21) and the ceramic
Three for viewing windows made of non-thermal storage insulation such as fiber
(23) is inserted and fixed. Combustion chamber from outside
(R) to visually check the gas combustion status, etc.
It is.

(24) The bottom plate (1) of the furnace body wall (A)
6) Thermal insulation mat integrated with backing from inside (upper side)
It is also non-heat storage such as ceramic fiber
Made of a heat insulating material, the inner and outer heat insulating layers (19a) (19)
airtightly surround the exhaust jacket (S) in conjunction with b)
I have.

(25) is below the exhaust jacket (S).
The bottom plate (16) of the furnace body wall (A),
Multiple outside air intakes distributed in the thermal insulation mat (24)
It is a hole and rises from the combustion chamber (R) due to high temperature.
The exhaust gas follows the arrow in FIG.
(14) Exhaust by the flow force drawn in
To be able to inhale fresh air into the jacket (S)
It has become.

However, the modification shown in FIG. 8 corresponding to FIG.
As suggested, the bottom plate (1)
6) and the installation of the heat insulation mat (24)
The lower surface of the exhaust jacket (S) is connected to the outside air inlet.
It may be fully opened as (25a).

The chimney forming the exhaust duct (B)
Also on the bottom of the base (13) facing the position directly below (14)
As is evident from FIGS. 1 and 8, the outside air intake port (26) is also open.
The mouth is formed, and from here on, new air is introduced into the exhaust duct (B).
Fresh air can be inhaled by itself.

(27) The above-mentioned base (13) and chimney (1)
4) Lined with the inner surface of the exhaust duct (B) communicating with
Non-thermal storage heat insulation layer
It consists of fiber, etc., and its insulation layer (27) and chimney
(14) There is a fixed insulated air layer (2
8) is also secured. (29) is the insulated air layer
This is the top cover of (28). The outside air suction hole (2
6) The non-heat storage property of the exhaust duct (B) as shown in FIGS.
It goes without saying that it penetrates the heat insulation layer (27).
No.

(30) is a gas burner for the bottom plate (16)
-A gas burner facing the inlet (18), says
It will be installed immediately below the pot (10)
But especially the phase of the pot (10) and the gas burner (30)
The flame of the combustion gas does not directly hit the bottom of the pot (10)
Thus, they are separated by a fixed distance (H).

For this fixed distance (H),
It is preferable to dimension to about 2-3 times the height of the flame
No. That is, the temperature at the tip of the flame is typically about 1600 ° C
Yes, conventionally, the distance between the tip and the bottom of the pot (10)
Is about 10 mm, and a gas flame substantially hits the bottom surface.
In the case of the present invention, the interval is set to about 80 mm.
And heat the bottom of the pan (10) to about 700-1000 ° C
The relationship is set so that it can be done. Gas burner
The gas supply line to (30) is not shown.

According to such a configuration, the food to be heated
Burns and incomplete combustion of gas can be prevented.
Even if it is separated by a certain distance (H),
The heat insulation layer (19) of the main body wall (A) is an inner / outer heat insulation layer (19).
a) Double structure from (19b) and easy to heat
Since it has a non-heat storage property that is easy to cool, its heat insulating layer (1
9) from gas burner (30) to pan (10)
It does not absorb and absorb the radiant heat transfer, but rather the inner insulation layer
Pot without loss by the conical body surface (19a-1) of (19a)
Actively reflecting to direct to (10)
A high thermal efficiency can be obtained.

[0038]

As described above, the pot (10) is used in the present invention.
Rigid furnace shaped into an almost inverted U-shaped cross section
A ceramic that is easy to heat and cool down on the inner surface of the main body wall (A)
Non-heat-storing outer heat-insulating layer (19
b) is integrated with the backing, and is substantially paired with the bottom of the pot (10).
Also non-heat storage, formed into a corresponding conically shaped cone
The inner heat-insulating layer (19a) is replaced with the outer heat-insulating layer (19b).
The inner insulation layer is fixed by fitting it inside the
The internal space of (19a) is a combustion chamber (R),
Interaction between the heat insulating layer (19a) and the outer heat insulating layer (19b)
The space is divided as an exhaust jacket (S) and
Numerous exhaust holes (2) distributed in the inner heat insulating layer (19a)
0), an exhaust duct communicating with the combustion chamber (R)
(B) is led out of the furnace wall of the furnace body (A) to the outside
While the gas burner is moved to a position directly below the pot (10).
(30), the flame of the combustion gas is directly in contact with the bottom of the pot (10).
Installed at a fixed distance (H) away from contact,
Radiant heat transfer from gas burner (30) to pan (10 )
According to the conical trunk surface (19a-1) of the inner heat insulating layer (19a).
And make it reflect toward the bottom of the pot (10)
In the gas direct fire type furnace set in

Close the lower surface of the exhaust jacket (S).
Easy to heat and cool on the bottom plate (16) of the furnace wall (A)
Non-heat storage material made of ceramic fiber
The heat insulating mat (24) is integrated with the backing, and the bottom plate (1) is integrated.
6) and a large number of outside air suction holes (2)
5) While the openings are distributed, the inside of the exhaust duct (B) is
Non-heat storage surface also made of ceramic fiber etc.
Backing and integrating a heat insulating layer (27)
Opening of the outside air intake hole (26) at the bottom of the air duct (B)
Has completely solved the problems of the prior art mentioned at the beginning.
There is a certain effect.

That is, according to the above configuration of the present invention, the furnace
The bottom of the pot (10) received on the main body wall (A)
Between the heating gas burner (30) and the combustion gas
Only a certain distance (H) where the flame does not directly hit the bottom of the pot (10)
Burn the food in the pan (10) because it is separated
There is no danger of incomplete combustion of gas.

Then, the flame of the combustion gas is applied to the pot (10).
Even if a certain distance (H) that does not directly hit the bottom
The heat-insulating layer (19) of the furnace wall (A) is an inner / outer heat-insulating layer
(19a) As a double structure from (19b), and heat
It has a non-heat storage property that is easy to cool and cool.
Unlike the thermal storage insulation layer consisting of a vest, the above gas bar
Radiant heat transfer from the knives (30) to the pot (10)
Does not absorb the radiant heat transfer, and
Conical body surface (19a-1) of corresponding inner heat insulation layer (19a)
Positively directs the bottom of the pot (10) without loss
And achieve extremely high thermal efficiency.
In addition, wasteful consumption of gas can be prevented.

In addition, the above non-heat storage property which is easy to heat and cool
Mutual interaction between the inner heat insulating layer (19a) and the outer heat insulating layer (19b)
In between, a constant exhaust jacket (S) and a combustion chamber (R)
Exhaust jacket
The bottom of the furnace body wall (A) that closes the lower surface of (S) (1)
6) also backed by a non-thermal storage insulation mat (24)
It is integrated. Furthermore, its exhaust jacket (S)
Similarly, the inner surface of the exhaust duct (B) that communicates with the
A heat insulating layer (27) is integrated with a backing.

In addition, the bottom plate (16) and its heat insulating
(24) has an outside air intake hole to the exhaust jacket (S)
(25) are distributed in a large number of openings, and the exhaust
The outside air suction hole to the duct (B) also on the bottom of
An opening (26) is formed.

Therefore, the inner heat insulating layer is moved from the combustion chamber (R).
(19a) through the exhaust hole (20), the exhaust jacket
The exhaust gas discharged to (S) is passed through its exhaust duct (B).
The outside air suction hole (25) (2)
Efficient cooling by fresh air sucked in from 6)
The temperature of the exhaust gas from its chimney (14)
Has the effect of reliably lowering
stand.

When the gas burner (30) is turned off
In addition, the furnace body wall (A) has its non-heat storage inner and outer insulation
The layers (19a) and (19b) and the heat insulating mat (24)
The exhaust duct (B) is also a non-thermal storage heat insulation layer
According to (27), it goes without saying that both cool down quickly.
Cleans these surfaces without burns.
That they can be cleaned cleanly and kept as good as new
Become.

Such effects are achieved by the structure of claim 2.
However, almost the same can be achieved.

In particular, if the configuration of claim 3 is adopted,
While ensuring the above-mentioned exhaust gas cooling effect, the pot (10)
The effective combustion gas that acts on the exhaust duct
(B ) can be prevented from being drawn out, and the gas
This has the effect of increasing the thermal efficiency of the device.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a gas direct-fired furnace according to the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is an enlarged cross-sectional view showing a chimney portion of an exhaust duct.

FIG. 4 is a plan view extracting and showing an inner heat insulating layer of a furnace main body wall.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is a side view showing a developed state of the inner heat insulating layer.

FIG. 7 is a side view showing a developed state of a modified example corresponding to FIG.

FIG. 8 shows a modification of the gas direct fired type furnace corresponding to FIG .
FIG.

[Explanation of symbols]

(10), pan (16), bottom plate (19), non-heat storage heat insulation layer (19a), inner heat insulation layer (19b), outer heat insulation layer (20), exhaust hole (24), non-heat storage heat insulation mat (25) ), Outside air suction hole (25a), outside air suction port (26), outside air suction hole (27), non-thermal storage heat insulating layer (30), gas burner (A), furnace wall (B), exhaust duct (H)・ Constant distance (R) ・ Combustion chamber (S) ・ Exhaust jacket

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F23D 14/20 A47J 27/14 F24C 3/08

Claims (3)

(57) [Claims] 1. A substantially U-shaped cross section surrounding a pot (10).
Heat the inner surface of the rigid furnace body wall (A) ,
Non-woven fabric made of ceramic fiber
The heat-insulating outer heat-insulating layer (19b) is integrated with the backing, and the conical cone of the lower side approximately corresponds to the bottom surface of the pot (10).
Also heat-insulating inner heat-insulating layer formed in a mold (19a)
Is fitted and fixed inside the outer heat insulating layer (19b).
By doing so, the internal space of the inner heat insulating layer (19a) is
Combustion chamber (R), and the same inner heat insulating layer (19a)
Exhaust jacket between the outer insulation layer (19b) and
(S), and a large number of exhaust holes distributed in the inner heat insulating layer (19a).
An exhaust duct communicating with the combustion chamber (R) via (20)
(B) is led out of the furnace wall of the furnace body (A) to the outside
On the other hand, a gas burner (30) is placed directly below the pot (10).
The flame of the combustion gas does not directly hit the bottom of the pot (10)
The gas burner is installed at a distance (H)
The radiant heat transfer from (30) to the pot (10) is transferred to the inner heat insulating layer.
(19a) the pan by the conical body surface (19a-1)
(10) It is determined that the light is reflected toward the bottom surface.
In a gas-fired furnace, a furnace body for closing the lower surface of the exhaust jacket (S)
On the bottom plate (16) of the wall (A), sera that is easy to heat and cool
Non-heat storage thermal insulation mat made of mic fiber etc.
The back plate (16) and its bottom plate (16)
A large number of outside air suction holes (25) are opened in the heat insulation mat (24)
The ceramic duct is also distributed on the inner surface of the exhaust duct (B).
Lined with non-heat-storing heat-insulating layer (27) made of var, etc.
At the same time, the outside air is placed on the bottom of the exhaust duct (B).
A gas-fired furnace having an inlet hole (26) formed therein . 2. A substantially inverted U-shaped cross section surrounding a pot (10).
Heat the inner surface of the rigid furnace body wall ( A),
Non-woven fabric made of ceramic fiber
The heat-insulating outer heat-insulating layer (19b) is integrated with the backing, and the conical cone of the lower side approximately corresponds to the bottom surface of the pot (10).
Also heat-insulating inner heat-insulating layer formed in a mold (19a)
Is fitted and fixed inside the outer heat insulating layer (19b).
By doing so, the internal space of the inner heat insulating layer (19a) is
Combustion chamber (R), and the same inner heat insulating layer (19a)
Exhaust jacket between the outer insulation layer (19b) and
(S), and a large number of exhaust holes distributed in the inner heat insulating layer (19a).
An exhaust duct communicating with the combustion chamber (R) via (20)
(B) is led out of the furnace wall of the furnace body (A) to the outside
On the other hand, a gas burner (30) is placed directly below the pot (10).
The flame of the combustion gas does not directly hit the bottom of the pot (10)
The gas burner is installed at a distance (H)
The radiant heat transfer from (30) to the pot (10) is transferred to the inner heat insulating layer.
The pot (1) is formed by the conical body surface (19-1) of (19a).
Gas defined to reflect toward the bottom of 0)
In a direct-fired furnace, the inner surface of the exhaust duct (B) is also easily heated and cooled.
Non-heat storage thermal insulation layer made of ceramic fiber etc.
(27) is integrated with the backing and its exhaust duct
(B) forming an open air suction hole (26) on the bottom surface
On the other hand, the lower surface of the exhaust jacket (S) is
features and be Ruga scan direct fire type stove that was fully open as a). 3. A large number of openings distributed in the inner heat insulating layer (19a).
The diameters of all the exhaust holes (20) are almost the same.
The interval pitch (P1) (P2) corresponds to the exhaust duct (B)
Rough near the exhaust position, and the further away from the exhaust duct (B)
Finely change the difference or make the interval pitches (P1) and (P2) almost uniform.
Then, the diameters (D1) and (D2) of the exhaust holes (20) are exhausted.
It is small near the position corresponding to the air duct (B).
3. The gas-fired furnace according to claim 1, wherein the farther the distance from the furnace (B) is, the greater the difference .