JP2001327412A - Liquid vessel heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid vessel heating apparatus which prevents increase in the room temperature and avoids oil scorching by cooling its exhaust pipe effectively to suppress temperature increase in the exhaust pipe. SOLUTION: The apparatus body consists of a liquid vessel T having an open end at the upper side which vessel is held in a casing K. The liquid vessel heating apparatus has a burner B for burning in a burning room 1 to heat the liquid vessel, and exhaust pipes 4, 5, 7, and 8 which guide and exhaust the burned exhaust gas from the burning room 1. Around the outside of the exhaust pipes 4, 5, 7, and 8, a cooling path C goes through. In the cooling path C, a fan F is fixed to blow a cooling wind. The burned exhaust gas through the exhaust pipes 4, 5, 7 and 8, and the cooling wind are to be exhausted to the emitting place 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus main body having a liquid tank having an upper part opened inside a casing, which is provided in the casing and burns in a combustion chamber for heating the liquid tank. A burner and a portion where the combustion exhaust gas from the combustion chamber for heating the liquid tank is extended upward to a rear part of the liquid tank or a lateral part of the liquid tank in the casing to discharge the exhaust gas outside the casing. And an exhaust pipe that guides and exhausts air to the liquid tank.

[0002]

2. Description of the Related Art In such a liquid tank heating apparatus, for example,
In the case of business use, for example, as shown in FIG. 7, a gas burner B burning in a combustion chamber 1 for heating a liquid tank is disposed in a casing K holding a liquid tank T. The combustion exhaust gas is configured to flow through the heating immersion pipe 3 penetrating the liquid tank T, and to heat the liquid in the liquid tank T while flowing through the heating immersion pipe 3. The gas is exhausted through an exhaust pipe 26 extending upward from the casing K to the outside. And the exhaust pipe 26
Is heated by the high-temperature combustion exhaust gas flowing through the inside thereof. Therefore, conventionally, a flow-through cylinder 27 that covers the entire circumference of the exhaust pipe 26 is provided on the outer peripheral portion of the exhaust pipe 26, The structure is such that air is sucked from below by natural draft to flow upward in the flow-through cylinder 27, and the exhaust cylinder 26 is cooled by the air flowing upward.

[0003]

However, the heating immersion tube 3
Since the combustion exhaust gas discharged from the exhaust pipe to the exhaust pipe 26 may reach 200 ° C. or higher in some cases, the cooling effect of the conventional natural draft described above is insufficient for the cooling effect on the exhaust pipe 26 and covers the exhaust pipe 26. The flow-through cylinder 27 also has a considerably high temperature, which not only causes an increase in the indoor temperature of a kitchen or the like, but also has a problem that the heating device cannot be arranged close to the wall surface. There is a disadvantage that the rising oil adheres to the surface of the flow-through cylinder 27 and burns in black, soils the flow-through cylinder 27, and is not hygienic.

[0004] The present invention focuses on such conventional problems. It is an object of the present invention to effectively cool an exhaust stack, suppress a rise in the temperature of the exhaust stack, and prevent a rise in indoor temperature. Another object of the present invention is to provide a liquid tank heating device capable of avoiding oil seizure.

[0005]

According to the first aspect of the present invention, an apparatus main body is configured by holding a liquid tank having an upper part opened inside a casing, and is provided in the casing. A burner burning in a combustion chamber for heating the tank,
The combustion exhaust gas from the combustion chamber for heating the liquid tank is extended upward to a rear part of the liquid tank or a side part of the liquid tank in the casing, and flows to a discharge point outside the casing. An exhaust pipe that guides and exhausts the liquid tank, wherein a cooling passage is provided on an outer peripheral portion of the exhaust pipe, and a fan that ventilates cooling air is provided in the cooling passage, The combustion exhaust gas and the cooling air flowing through the exhaust stack are exhausted to the discharge point.

In other words, a cooling passage is provided on the outer peripheral portion of the exhaust pipe that guides the flow of the combustion exhaust gas, and the cooling air is passed through the cooling passage by a fan. The part is forcibly cooled, and the combustion exhaust gas and the cooling air are exhausted to the discharge point. Therefore, compared to the conventional cooling by natural draft, the exhaust stack can be more effectively cooled and the temperature rise of the exhaust stack can be reliably suppressed, the indoor temperature can be prevented from rising, and the seizure of oil can be avoided. It becomes possible.

According to the second aspect of the present invention, the combustion exhaust gas and the cooling air are mixed and exhausted at a location where the combustion exhaust gas is discharged or at an intermediate location of the cooling passage. The exhaust temperature is reduced by mixing the cooling air, and low-temperature exhaust can be performed in addition to the above-described exhaust tube cooling effect.

According to the characteristic configuration of the third aspect, the inside of the casing is ventilated by the fan to cool the surface of the apparatus main body from the inside thereof. In addition, it is possible to more reliably prevent the rise of the device body, and to improve the safety for the worker by cooling the surface of the device body that is likely to be in contact with the operator, such as the surface of the top plate of the device body. be able to.

According to a fourth aspect of the present invention, the cooling passage is provided in a part of the outer peripheral portion of the exhaust pipe in a circumferential direction, and the cooling passage is provided in another part of the outer peripheral part of the exhaust pipe in the circumferential direction. An ascending airflow channel that raises the air outside the casing by natural draft is provided, so in addition to forced cooling by a fan, cooling by the air outside the casing, which has a relatively low temperature, is also possible, and the entire exhaust stack is made more efficient. Can be cooled well. Since the fan is disposed in the internal space of the casing and sucks air in the internal space and ventilates the cooling passage, external air flows into the internal space of the casing by suction by the fan, and the comparison is performed. External air having a low target temperature flows through the internal space of the casing, and the casing can be favorably cooled from the inside using a fan for cooling the exhaust stack.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a liquid tank heating device according to the present invention will be described with reference to the drawings. This liquid tank heating device is for heating a fryer, a tempura pan, a noodle pot, etc. used for business, for example, as shown in FIGS.
As shown in the figure, a liquid tank T having an open upper part is held inside a stainless steel casing K to constitute an apparatus main body.
Cooking oil is stored in the liquid tank T for a fryer or a tempura pan, and boiling water is stored in the liquid tank T for a noodle pot.
Gas in the gas burner B disposed in the casing K
It is configured to be heated by. Gas burner B
A stainless steel combustion chamber casing 2 that forms a combustion chamber 1 for heating the liquid tank is disposed above and fixed to the front side of the liquid tank T. A plurality of heating immersion pipes 3 each having a heat retaining plate are arranged so as to penetrate in the front-rear direction, and the front side of each of the heating immersion pipes 3 is configured to communicate with the combustion chamber 1 for heating the liquid tank. I have.

As shown in detail in FIGS. 3 and 4, a first exhaust pipe 4 made of stainless steel is located at the rear portion of the liquid tank T and is fixed to the rear surface of the liquid tank T. Cylinder 4
The rear side of the heating immersion pipe 3 communicates with the
The first exhaust pipe 4 has a second exhaust pipe 5 also made of stainless steel.
The combustion exhaust gas from the gas burner B flows from the combustion chamber 1 for heating the liquid tank to the first and second exhaust pipes 4 and 5 via the heating immersion pipe 3, and the heating immersion pipe 3 It is configured to heat the liquid in the liquid tank T while flowing through. The casing K is opened at a lower portion of the front surface thereof and communicates with the inner space. A cooling box 6 made of stainless steel is arranged and fixed to the casing K in the inner space. And the second exhaust stack 4,
The outer peripheral portion of the exhaust pipe 5 is covered in a closed state, and a cooling passage C is formed all around the outer peripheral section of the exhaust cylinders 4 and 5. A sirocco fan F is arranged in the inner space of the casing K, and its discharge port is connected to the cooling box 6 to suck air in the inner space from both left and right side surfaces in FIG. The cooling air from the discharge port is passed through the cooling passage C.

On the rear surface of the casing K, an external exhaust pipe made of stainless steel extending upward is attached.
The external exhaust cylinder is constituted by a third exhaust cylinder 7 extending rearward in a substantially horizontal direction from the rear surface of the casing K, and a fourth exhaust cylinder 8 which is communicated with the third exhaust cylinder 7 and extends in a substantially vertical direction. I have. The third exhaust cylinder 7 is formed in a flat shape such that the cross-sectional shape becomes an elongated rectangle.
A stainless steel cooling cylinder 9 having a rectangular cross section is externally fitted to the outer periphery of the third exhaust cylinder 7. The cooling cylinder 9 is connected to the outer periphery of the third exhaust cylinder 7 by the plurality of connectors 10. A cooling passage C is formed. By attaching the cooling cylinder 9 to the rear surface of the casing K,
The cooling passage C formed by the cooling cylinder 9 communicates with the cooling passage C formed by the cooling box 6 via an opening 11 formed on the rear surface of the casing K, and the third exhaust cylinder 7 is , Are fitted to the second exhaust pipe 5 so as to communicate with each other.

The fourth exhaust cylinder 8 also has a rectangular flat shape with a rectangular cross section. The lower part is closed, and the extension plate 12 extends from the short side of the rectangle. 4 In the circumferential direction of the outer peripheral portion of the exhaust pipe 8, a cooling plate 13 having a U-shaped cross section is provided on the outer periphery of the front surface and the left and right lateral side surfaces, and a ventilation plate 14 is provided on the outer surface of the rear surface. The cooling plate 13 is arranged and integrated with each other, and the cooling plate 13 forms a cooling passage C whose lower part is closed on the front surface and the left and right side surfaces of the fourth exhaust tube 8, and the rear surface of the fourth exhaust tube 8 is formed by the ventilation plate 14. An upward airflow channel A having a downward opening at the side is formed. By attaching the cooling plate 13 to the cooling cylinder 9, the cooling passage C formed by the cooling plate 13 is connected to the cooling cylinder 9 through an opening 15 formed below the front surface of the cooling plate 13. And the third exhaust pipe 7 is configured to fit into an opening 16 formed below the front surface of the fourth exhaust pipe 8 to communicate with each other. I have.

The cooling plate 13 and the ventilation plate 14 have an upper portion extending above the fourth exhaust pipe 8, and a space surrounded by the extending portion of the cooling plate 13 and the ventilation plate 14. , For the combustion exhaust gas discharged from the fourth exhaust stack 8,
The cooling air from the cooling passage C and the ascending air from the ascending air flow path A are mixed to function as a mixing space 18 to be exhausted to a discharge point 17 outside the casing K. The upper portion of the ventilation plate 14 extends further upward than the cooling plate 13 and is bent toward the front side. Is configured to function as a guide plate 20 that guides the deflection to the hood 19 side.

Next, an operation state of the liquid tank heating device will be described. Fuel gas such as city gas or propane gas is supplied to the gas burner B, and high-temperature combustion exhaust gas generated by combustion of the fuel gas is supplied to a combustion chamber for heating a liquid tank as shown by a broken line in the figure. 1 flows into the heating immersion pipe 3, and heats the liquid in the liquid tank T while flowing through the heating immersion pipe 3, and flows through the first to fourth exhaust pipes 4, 5, 7, 8. It is guided and exhausted to the discharge point 17 outside the casing K. The exhaust pipes 4, 5, 7, and 8 are heated by the flow of the combustion exhaust gas to a high temperature.
Of the first and second exhaust pipes 4,5,7,8
5, especially the first exhaust pipe 4 has the highest temperature. The cooling air discharged from the sirocco fan F is directly blown to the first exhaust pipe 4 through the cooling passage C formed by the cooling box 6 as shown by a solid line in the figure, The exhaust stack 4 is effectively cooled, and
The exhaust pipe 5 is also cooled.

At this time, since the sirocco fan F sucks the air in the space inside the casing K, the inside space of the casing K is drawn into the space inside the casing K from the opening on the lower surface with the suction of the air. Because air flows in and ventilates,
The casing K is also efficiently cooled from the inside. Then, in the third exhaust pipe 7 through which the combustion exhaust gas flows, the cooling air flowing through the cooling passage C formed by the cooling pipe 9 is efficiently cooled from the entire outer peripheral portion thereof, and the third exhaust pipe 7 is cooled. The temperature rise of the cylinder 7 is also suppressed.

In the fourth exhaust pipe 8 thereafter, the front surface and the left and right lateral sides are cooled by cooling air flowing through a cooling passage C formed by the cooling plate 13. Is cooled by the air flowing through the upward air flow path A, as indicated by a dashed line in the figure. That is, by the time the gas flows through the outer peripheral portion of the fourth exhaust pipe 8,
Although the temperature of the cooling air has also risen, the rear surface of the fourth exhaust pipe 8 is cooled by relatively cool external air that rises and flows through the ascending air flow path A by natural draft. The overall temperature rise is effectively suppressed,
Thereafter, in the mixing space 18, the cooling air from the cooling passage C and the air from the rising air flow path A are mixed with the combustion exhaust gas from the fourth exhaust pipe 8, and the temperature of the entire exhaust gas is reduced. The gas is exhausted to the discharge point 17.

In order to confirm the effect of the liquid tank heating apparatus having the above-described configuration, a fryer was subjected to a comparison test with the conventional apparatus shown in FIG. 7, and an example of the result will be described below. In the conventional device, the temperature of the top plate on the upper surface of the casing K was 75 ° C., but in the present device, the temperature dropped to 45 ° C.
Conventionally, the temperature of the exhaust cylinder surface extending upward from the casing K was 110 ° C.
The temperature of the exhaust gas is controlled to 5 ° C., and the exhaust gas finally discharged is 235 ° C. in the conventional apparatus, but 1 in the present apparatus.
The temperature dropped to 50 ° C.

Therefore, in the liquid tank heating device according to the present invention, the ambient temperature above the liquid tank T is considerably reduced,
Therefore, a shelf or the like can be arranged above the liquid tank T, and the cooling cylinder 9 on the outer peripheral part of the third exhaust cylinder 7 and the fourth cylinder 4
The surfaces of the cooling plate 13 and the ventilation plate 14 on the outer periphery of the exhaust pipe 8 are covered with a decorative cover, and the cooling plate 13 and the ventilation plate 1
The fourth exhaust pipe 8 including the fourth exhaust pipe 8 can be embedded in the wall.

[Other Embodiment] Next, another embodiment will be described in a simplified manner. However, in order to avoid redundant description, the same components and components having the same functions as those described in the previous embodiment will be described. The description is omitted by attaching the same reference numerals, and a configuration different from that of the previous embodiment will be mainly described.

(1) In the above embodiment, the first exhaust pipe 4 and the second exhaust pipe 5 are arranged inside the casing K, and
In the fourth exhaust pipe 8 constituting the external exhaust pipe extending from the casing K, a part of the outer peripheral portion in the circumferential direction, that is,
An example is shown in which a cooling passage C is formed on the front side and the left and right lateral side surfaces, and an ascending air flow path A is formed on the other rear surface side. However, as shown in FIG. Only the external exhaust pipe 21 extending from the casing K is provided at a side location,
The combustion exhaust gas from the heating immersion pipe 3 may be directly introduced into the external exhaust pipe 21 and guided to the discharge point 17. And this FIG.
As shown in the figure, the entire circumference of the outer peripheral portion of the external exhaust cylinder 21 in the circumferential direction may be covered with the cooling cylinder 22 so that only the cooling passage C is formed on the entire outer peripheral of the external exhaust cylinder 21. In this case, in the mixing space 18, only the cooling air from the cooling passage C is mixed with the combustion exhaust gas discharged from the external exhaust pipe 21 in the mixing space 18 and exhausted to the discharge point 17 outside the casing K. . Further, the sirocco fan F that allows the cooling air to flow through the cooling passage C is not disposed in the inner space of the casing K as in the previous embodiment, but is disposed outside the casing K as shown in FIG. They can also be placed.

(2) In the above embodiment, the sirocco fan F is arranged in the space inside the casing K, and a ventilation flow is generated inside the casing K by using the suction of the sirocco fan F, thereby forming the casing K. Although an example in which cooling was performed from the inside was shown, as shown in FIG.
May be arranged outside the casing K, a part of the cooling air discharged from the sirocco fan F is supplied to the cooling box 6, and the casing K is cooled from the inside by the remaining cooling air. In that case,
6, a ventilation passage 24 is provided below the top plate 23 of the casing K, and the ventilation passage 24 and the cooling box 6 are connected by a duct 25. By allowing the cooling air to flow through the ventilation passage 24, the portion to be cooled can be locally and efficiently cooled from the inside, and the ventilation passage 24 can be communicated with the cooling passage C, thereby providing ventilation. The third and fourth exhaust pipes 7, 8 can also be cooled by effectively utilizing the cooling air from the path 24. In the embodiment shown in FIG. 6, since the top plate 23 is located on the upper surface of the apparatus main body, the top plate 23
1 and FIG. 5, the edge 23 of the liquid tank T is provided on the upper surface of the apparatus main body, as shown in FIGS.
When A is located, the edge 23A of the liquid tank T is locally cooled from the inside, and when the edge 23A of the liquid tank T and the top plate 23 are located on the upper surface of the apparatus main body. Cools both from the inside. Further, if necessary, the front of the device body can be cooled from the inside,
In the present invention, these are collectively referred to as the surface of the apparatus main body. Further, in the case of cooling the exhaust pipes 4, 5, 7, 8 and the surfaces 23, 23A of the apparatus main body in this way, in the embodiments described above, a configuration in which cooling is performed by the same fan F has been described. The cylinders 4, 5, 7, 8 and the surfaces 23, 23A of the apparatus main body may be configured to be cooled by separate fans.

(3) In the embodiments described above, the first and second exhaust pipes 4, 5 arranged in the casing K are covered with the cooling box 6, or the external exhaust pipes 7, 8, extending from the casing K, Although an example is shown in which the cooling cylinder 21 is covered with the cooling cylinder 9, the cooling plate 13, and the cooling cylinder 22 to form a double structure, for example, the exhaust cylinders 4, 5, 7, 8, and
The cooling passage C may be provided twice in the outer peripheral portion of the cooling member 21, or may be further provided with three or more cooling passages.
In the embodiments described above, the mixing space 18 is provided in the vicinity of the emission point 17 of the combustion exhaust gas, and in the mixing space 18, the cooling air or the rising air is mixed with the combustion exhaust gas to exhaust the exhaust gas. , In addition to the mixing space 18,
A through hole for mixing is provided in the exhaust pipe 8 and the external exhaust pipe 21 at a partway point, and a part of the combustion exhaust gas is added to the cooling air flowing through the cooling passage C or the rising air flowing through the rising air flow path A, or ,
It is also possible to mix all of them and exhaust them to the discharge point 17. Further, an example is shown in which the external exhaust cylinders 7, 8, 21 extending from the casing K are extended to the rear side of the liquid tank T. A sirocco fan is shown as an example of the fan F that passes the cooling air through the cooling passage C. However, various types such as a turbo fan and an axial flow fan can be used. You can use a fan.

(4) In the embodiments described above, a liquid tank heating device for heating a fryer, a noodle pot, and the like used for business purposes has been described as an example. In this case, the gas burner B is directly disposed below the liquid tank T, and the gas burner B is provided between the gas burner B and the bottom of the liquid tank T from the combustion chamber 1 for heating the liquid tank. The exhaust gas is exhausted to the discharge point 17 while being guided by the exhaust gas through the exhaust pipe.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a liquid tank heating device.

FIG. 2 is a partially cutaway front view of the liquid tank heating device.

FIG. 3 is an exploded perspective view of an exhaust pipe.

FIG. 4 is a partially cutaway perspective view of an exhaust pipe.

FIG. 5 is a longitudinal sectional side view of a liquid tank heating device according to another embodiment.

FIG. 6 is a longitudinal sectional side view of a liquid tank heating device according to another embodiment.

FIG. 7 is a vertical sectional side view of a conventional liquid tank heating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combustion chamber for heating of liquid tank 4, 5, 7, 8, 21 Exhaust pipe 17 Release point 23, 23A Surface of apparatus main body A Ascending air flow path B Burner C Cooling path F Fan K Casing T Liquid tank

Claims (4)

[Claims] A burner that is provided in the casing and burns in a combustion chamber for heating the liquid tank; and a burner that is provided in the casing and burns in a combustion chamber for heating the liquid tank. Extending upward to the rear part of the liquid tank or a lateral part of the liquid tank, the exhaust gas from the combustion chamber for heating the liquid tank is guided to flow to the discharge point outside the casing. A liquid tank heating device provided with an exhaust pipe for exhausting, wherein a cooling passage is provided on an outer peripheral portion of the exhaust pipe, and a fan for passing cooling air is provided in the cooling passage, and the exhaust pipe is provided. A liquid tank heating device configured to exhaust combustion exhaust gas flowing through the cooling air and the cooling air to the discharge point. 2. The system according to claim 1, wherein the combustion exhaust gas and the cooling air are mixed and exhausted at a location where the combustion exhaust gas is discharged or at a location along the cooling passage.
6. The liquid tank heating device according to 1. 3. The liquid tank heating device according to claim 1, wherein the fan is configured to ventilate an inner portion of the casing to cool a surface of the device main body from an inner side thereof. 4. A part of an outer peripheral portion of the exhaust cylinder in a circumferential direction,
The cooling passage is provided, and an ascending airflow path for ascending and flowing air outside the casing by natural draft is provided at another circumferential portion of an outer peripheral portion of the exhaust pipe, and the fan is provided inside the casing. The heating device for a liquid tank according to any one of claims 1 to 3, wherein the heating device is arranged in a space, and is configured to suck air in the internal space and ventilate the cooling passage.