Heating system

Abstract

The present invention provides a heating device that can suppress the temperature rise and whitening of the glass outer cylinder containing the red-hot element, thereby maintaining the aesthetic appearance of the outer cylinder. [Solution] The heating device 1 has a lower end opening of a glass outer cylinder 40 housed in a radiant chamber 30 that is connected to a combustion section 10. The combustion section 10 comprises a cylindrical body 11 and a pot 12 housed inside the cylindrical body 11. A ventilation space 17 is formed between the inner circumferential surface of the cylindrical body 11 and the outer circumferential surface of the pot 12, and the ventilation space 17 is divided into a first branched passage A1 and a second branched passage A2 by a partition member 70. A portion of the air supplied into the cylindrical body 11 flows into the pot 12 from the first branched passage A1, and a portion of the air supplied into the cylindrical body 11 flows towards the inner circumferential surface of the outer cylinder 40 through the second branched passage A2.

Description

Technical Field

[0001] The present invention relates to a heating device. Background Art

[0002] In a radiation-type heating device (so-called oil heater) that burns fuel (kerosene) in a combustion section to heat a red-hot body and radiates infrared rays from the red-hot body into a room, the red-hot body is housed in a glass outer cylinder disposed inside a radiation chamber (see, for example, Patent Document 1). Prior Art Documents Patent Documents

[0003] Patent Document 1 Japanese Unexamined Patent Application Publication No. 2022-145103 Summary of the Invention Problems to be Solved by the Invention

[0004] In conventional heating devices, the outer cylinder is heated by combustion gas from the combustion section, and when the outer cylinder reaches a high temperature, impurities contained in the combustion gas burn onto the inner peripheral surface of the outer cylinder, causing whitening that makes the glass outer cylinder cloudy, which impairs the aesthetic appearance of the outer cylinder.

[0005] An object of the present invention is to solve the above-described problems and provide a heating device that can suppress temperature rise and whitening of the glass outer cylinder housing a red-hot body, and can maintain the aesthetic appearance of the outer cylinder. Means for Solving the Problems

[0006] To solve the aforementioned problems, the present invention provides a heating device comprising a box-shaped exterior member and a combustion unit housed in the lower part of the exterior member, wherein the exterior member has a radiant chamber opening on its front surface, and the upper end of the combustion unit protrudes from the bottom surface of the radiant chamber. Inside the radiant chamber are a cylindrical outer cylinder made of glass and a red-hot body housed inside the outer cylinder, and the lower end opening of the outer cylinder is connected to the upper end of the combustion unit. The combustion unit comprises a cylindrical body, a bottomed cylindrical pot housed inside the cylindrical body, and an air supply unit for supplying air into the cylindrical body, with ventilation holes formed in the peripheral wall of the pot. A ventilation space is formed between the inner surface of the cylindrical body and the outer surface of the pot, and the ventilation space is divided into a first branched passage and a second branched passage by a partition member. The air flows upward within the ventilation space, with a portion of the air flowing into the pot through the first branch channel and the ventilation hole, and a portion of the air flowing toward the inner surface of the outer cylinder through the second branch channel.

[0007] In the heating device of the present invention, the air flowing into the pot from the first branched passage is used as combustion air to generate combustion at the upper end of the pot. In addition, the air flowing from the second branched passage toward the inner surface of the outer cylinder is used as cooling air to cool the inner surface of the outer cylinder. In this configuration, cooling air flows over the inner surface of the outer cylinder, forming an air layer. This suppresses the temperature rise of the outer cylinder caused by combustion gases and prevents impurities in the combustion gases from adhering to the inner surface of the outer cylinder. As a result, whitening of the glass outer cylinder can be suppressed, and the aesthetic appearance of the outer cylinder can be maintained.

[0008] Furthermore, if whitening occurs in the glass outer cylinder, a difference in thermal expansion coefficients between the cloudy and transparent areas may occur, potentially causing the outer cylinder to deform. However, in this invention, whitening of the glass outer cylinder can be suppressed, thereby suppressing deformation of the outer cylinder and improving its airtightness.

[0009] In the heating device described above, the partition member comprises an annular mounting portion fitted to the outer surface of the pot and a partition plate extending from the mounting portion into the ventilation space, and the partition plate separates the first branch channel and the second branch channel within the ventilation space, thereby easily forming the first branch channel and the second branch channel within the ventilation space.

[0010] In the heating device described above, an upper plate is provided to close the upper opening of the ventilation space, an outlet hole is formed in the upper plate, the lower opening of the outlet hole is connected to the second branched flow path, and the upper opening of the outlet hole is opened toward the inner circumferential surface of the outer cylinder. In this configuration, cooling air can be reliably blown from the outlets onto the inner surface of the outer cylinder. Furthermore, by adjusting the ratio of combustion air to cooling air through the number and opening area of ​​the outlets, combustion and cooling of the outer cylinder can be precisely controlled.

[0011] In the aforementioned heating device, if the upper opening of the outlet is inclined in the circumferential direction of the outer cylinder with respect to the radial direction of the outer cylinder, the cooling air ejected from the outlet flows spirally over the inner circumferential surface of the outer cylinder, allowing the cooling air to flow smoothly upward. [Effects of the Invention]

[0012] In the combustion section of the heating device of the present invention, cooling air is circulated separately from the combustion air over the inner surface of the outer cylinder, thereby suppressing the temperature rise and whitening of the glass outer cylinder, and thus maintaining the aesthetic appearance of the outer cylinder. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view of a heating device according to an embodiment of the present invention, viewed from the front. [Figure 2] This is a cross-sectional view taken along line II-II in Figure 1, showing a heating device according to an embodiment of the present invention. [Figure 3] This is an enlarged cross-sectional view showing a combustion section according to an embodiment of the present invention. [Figure 4]It is an exploded perspective view showing a combustion unit according to an embodiment of the present invention. [Figure 5] It is an enlarged perspective view showing blowout holes of an upper plate according to an embodiment of the present invention. [Figure 6] It is a plan view showing a modified example of the blowout holes according to an embodiment of the present invention. MODE FOR CARRYING OUT THE INVENTION

[0014] Embodiments of the present invention will be described in detail with appropriate reference to the drawings. As shown in Fig. 1, the heating device 1 of the present embodiment is a radiation type stove that radiates infrared rays into a room by using heat generated by burning fuel (e.g., kerosene).

[0015] The heating device 1 includes a box-shaped exterior member 2 made of metal. A radiation chamber 30 is formed in the central portion of the exterior member 2. The upper, lower, left, right, and rear surfaces of the radiation chamber 30 are formed of metal plates. The front surface of the radiation chamber 30 is open to the front surface (front face) of the exterior member 2. As shown in Fig. 2, the heating device 1 further includes a combustion unit 10 housed in the lower part of the exterior member 2, and an exhaust unit 20 provided at an appropriate position inside the exterior member 2.

[0016] The combustion unit 10 is a pot-type heat source, and includes a cylindrical body 11, a bottomed cylindrical pot 12 housed in the cylindrical body 11, a flame regulating cylinder 16 housed in the pot 12, a partition member 70 and an upper plate 80 attached to the upper end of the cylindrical body 11. The combustion unit 10 further includes an oil supply nozzle 13 that supplies fuel to the bottom surface of the pot 12, and an ignition heater 14 disposed at the lower part inside the pot 12. Furthermore, the combustion unit 10 includes an air supply unit 15 that supplies air to the lower part inside the cylindrical body 11.

[0017] As shown in Fig. 4, the cylindrical body 11 is a metal cylindrical member. As shown in Fig. 1, the upper end of the cylindrical body 11 protrudes from the central portion of the bottom surface of the radiation chamber 30. As shown in FIG. 4, the pot 12 is a bottomed cylindrical member made of metal. A plurality of vent holes 12a are formed in the upper part and the lower part of the peripheral wall of the pot 12. As shown in FIG. 3, the pot 12 is accommodated in the central portion inside the cylinder 11. An annular ventilation space 17 is formed between the inner peripheral surface of the cylinder 11 and the outer peripheral surface of the pot 12.

[0018] In the combustion section 10, as shown in FIG. 2, fuel supplied from the oil supply nozzle 13 to the bottom surface of the pot 12 is vaporized by the heat of the ignition heater 14. The air supplied to the lower part of the ventilation space 17 inside the cylinder 11 by the air supply section 15 flows upward in the ventilation space 17, and flows into the pot 12 through the respective vent holes 12a as combustion air. Then, inside the pot 12, the combustion air and the vaporized fuel are mixed, and the mixture is ignited by the heat of the ignition heater 14, thereby causing combustion at the upper end of the pot 12. The flame regulating cylinder 16 is a metal cylinder accommodated in the pot 12, and promotes mixing of the combustion air and the vaporized fuel.

[0019] As shown in FIG. 4, the partition member 70 is formed with an annular mounting portion 71 and an annular partition plate 72 extending outward from the lower end opening edge of the mounting portion 71. An inclined portion 72a extending obliquely downward from the lower end opening edge of the mounting portion 71 is formed on the upper part of the partition plate 72, and a vertical portion 72b extending downward along the peripheral wall of the cylinder 11 is formed on the lower part of the partition plate 72 (see FIG. 3).

[0020] As shown in FIG. 3, the upper part inside the ventilation space 17 is partitioned in the radial direction by the annular partition plate 72. Thereby, the upper part inside the ventilation space 17 is divided into a first branch flow path A1 and a second branch flow path A2. The first branch flow path A1 is an annular space formed on the outer peripheral surface side of the pot 12 with respect to the partition plate 72. The second branch flow path A2 is an annular space formed on the inner peripheral surface side of the cylinder 11 with respect to the partition plate 72. The second branch flow path A2 is formed so as to surround the first branch flow path A1.

[0021] The top plate 80 is an annular cover member that closes the upper opening of the ventilation space 17 (see Figure 4). The inner circumference of the top plate 80 is fitted to the outer surface of the mounting portion 71 of the partition member 70. The outer circumference of the top plate 80 is fitted to the inner surface of the cylindrical body 11. As shown in Figure 4, multiple protrusions 81 are formed on the radially inner portion of the upper surface of the upper plate 80. The protrusions 81 are formed by extruding the upper plate 80 from the lower side (see Figure 5). The multiple protrusions 81 are arranged in a line in the circumferential direction of the upper plate 80.

[0022] As shown in Figure 3, the protrusion 81 has an outlet hole 82 that penetrates from the bottom to the top of the upper plate 80. In other words, multiple outlet holes 82 are arranged in a line in the circumferential direction on the upper plate 80 (see Figure 4). The lower opening of the discharge hole 82 is connected to the second branch channel A2. Furthermore, as shown in Figure 5, the discharge hole 82 is inclined diagonally upward toward the radially outward side of the upper plate 80 as it moves from the lower opening to the upper opening within the protrusion 81.

[0023] As shown in Figure 1, the radiation chamber 30 contains a cylindrical outer tube 40, a red-hot body 50 housed inside the outer tube 40, and a reflector 60 positioned behind the outer tube 40. The reflector 60 is a metal plate that forms the left and right sides and the rear of the radiation chamber 30.

[0024] The red-hot body 50 is a cylindrical metal component. The peripheral wall of the red-hot body 50 is formed in a mesh pattern. As shown in Figure 2, the red-hot body 50 is suspended from the top surface of the radiation chamber 30 and is positioned directly above the upper end of the combustion section 10. The red-hot body 50 is heated by the combustion section 10 and becomes red-hot.

[0025] The exhaust section 20 includes a heat dissipation channel 21 and an exhaust pipe 22 provided within the outer casing member 2. The heat dissipation channel 21 is formed inside the upper part of the outer casing member 2. At the top surface of the radiant chamber 30, the intake port 21a of the heat dissipation channel 21 protrudes from the portion above the red-hot body 50. The intake port 21a is a cylindrical vent. One end of the exhaust pipe 22 is in communication with the heat dissipation channel 21. The exhaust pipe 22 extends outside the exterior member 2 through an opening formed in the rear wall of the exterior member 2.

[0026] As shown in Figure 1, the outer cylinder 40 is a cylindrical member made of heat-resistant glass. As shown in Figure 2, the upper end of the outer cylinder 40 is connected to the lower end of the intake port 21a. This allows the upper opening of the outer cylinder 40 to communicate with the heat dissipation passage 21 of the exhaust section 20.

[0027] As shown in Figure 3, the lower opening edge of the outer cylinder 40 is placed on the upper surface of the upper plate 80, on the radially inward portion, via an annular packing P. In this way, the lower end of the outer cylinder 40 is connected to the upper end of the cylindrical body 11. As a result, the lower end opening of the outer cylinder 40 is in communication with the internal space of the cylindrical body 11 of the combustion section 10. The upper openings of each discharge hole 82 formed in the upper plate 80 open upward toward the inner circumferential surface of the outer cylinder 40.

[0028] As shown in Figure 2, the internal space of the outer cylinder 40 forms a ventilation passage between the combustion section 10 and the exhaust section 20. The internal space of the outer cylinder 40 is airtight with respect to the internal space of the radiation chamber 30. A red-hot body 50 is housed inside the outer cylinder 40. An annular space is formed between the inner surface of the outer cylinder 40 and the outer surface of the red-hot body 50. The combustion gas generated by the combustion in the combustion section 10 is exhausted to the outside through the outer cylinder 40 and the exhaust section 20.

[0029] In the heating device 1 described above, as shown in Figure 3, a first branched flow path A1 communicating with each vent hole 12a of the pot 12 and a second branched flow path A2 communicating with each outlet hole 82 of the upper plate 80 are partitioned within the cylindrical body 11 of the combustion section 10. In this configuration, the air supplied to the lower part of the cylindrical body 11 by the air supply unit 15 flows upward through the ventilation space 17, and in the upper part of the ventilation space 17, it splits into a first branched flow path A1 and a second branched flow path A2 and flows in. The air that flows into the first branch channel A1 flows into the pot 12 through each vent hole 12a as combustion air. Then, the mixture of combustion air and vaporized fuel burns, and the combustion gas flows upward inside the outer cylinder 40.

[0030] The air that flows into the second branch channel A2 flows as cooling air from each outlet 82 of the upper plate 80 toward the inner surface of the outer cylinder 40, and flows upward along the inner surface of the outer cylinder 40. As a result, an air layer is formed on the inner surface of the outer cylinder 40, which suppresses the temperature rise of the outer cylinder 40 due to the combustion gas and makes it difficult for impurities contained in the combustion gas to adhere to the inner surface of the outer cylinder 40. Thus, in the heating device 1 of this embodiment, the whitening of the glass outer cylinder 40 can be suppressed, and the aesthetic appearance of the outer cylinder 40 can be maintained.

[0031] Furthermore, in the heating device 1 of this embodiment, the whitening of the glass outer cylinder 40 can be suppressed, thereby suppressing deformation of the outer cylinder 40 due to the difference in thermal expansion coefficients between the cloudy and transparent parts when the glass outer cylinder 40 whitens. This improves the airtightness of the joint between the outer cylinder 40 and the combustion section 10, and the joint between the outer cylinder 40 and the exhaust section 20.

[0032] In the heating device 1 of this embodiment, since the outlet holes 82 formed in the upper plate 80 open toward the inner circumferential surface of the outer cylinder 40, cooling air can be reliably blown from each outlet hole 82 toward the inner circumferential surface of the outer cylinder 40.

[0033] In the heating device 1 of this embodiment, the ratio of combustion air to cooling air can be adjusted by changing the number and opening area of ​​the outlet holes 82 in the upper plate 80. Furthermore, the ratio of combustion air to cooling air can be adjusted by adjusting the distance between the lower surface of the upper plate 80 and the upper surface of the partition plate 72, and the distance between the outer surface of the pot 12 and the inner surface of the partition plate 72. In addition, the ratio of combustion air to cooling air can also be adjusted by adjusting the inclination angle of the inclined portion 72a of the partition plate 72. By adjusting the ratio of combustion air to cooling air in this way, the outer cylinder 40 can be cooled without reducing combustion efficiency.

[0034] In the heating device 1 of this embodiment, the first branched flow path A1 and the second branched flow path A2 can be easily separated inside the cylindrical body 11 by fitting the mounting portion 71 of the partition member 70 to the upper end of the pot 12.

[0035] Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from its spirit. In this embodiment, as shown in Figure 4, a plurality of air outlets 82 are formed in a row in the circumferential direction on the upper plate 80, but the size, shape, and diameter of the air outlets 82 are not limited. For example, as shown in Figure 6, the upper opening of the outlet hole 82 of the upper plate 80 may be inclined in the circumferential direction of the outer cylinder 40 with respect to the radial direction of the outer cylinder 40. In this case, the cooling air ejected from the outlet hole 82 flows spirally over the inner circumferential surface of the outer cylinder 40 (see Figure 3), allowing the cooling air to flow smoothly upwards. Alternatively, the upper plate 80 shown in Figure 3 may be omitted, and cooling air may be configured to flow from the upper end opening of the second branch channel A2 toward the inner circumferential surface of the outer cylinder 40.

[0036] In this embodiment, as shown in Figure 1, the glass outer cylinder 40 is formed in a cylindrical shape, but the shape of the outer cylinder 40 is not limited. Also, in this embodiment, the entire outer cylinder 40 is made of glass, but a metal wall portion may be used for part of the outer cylinder 40. [Explanation of symbols]

[0037] 1. Heating system 2. Exterior components 10 Combustion section 11 Cylinder 12 pots 12a Ventilation holes 13 Fuel nozzle 14 Ignition heater 15 Air supply unit 16 Flame control tube 17 Ventilated space 20 Exhaust section 21 Heat radiation flow path 21a Intake 22 Exhaust pipe 30 Radiation chamber 40 Outer cylinder 50 Red-hot objects 60 Reflector 70 Partition members 71 Mounting part 72 partition plates 72a Slope 72b Vertical section 80 Top board 81 Convex part 82 Air outlet A1 First branch channel A2 Second branch channel P packing

Claims

1. Box-shaped exterior component, The exterior member comprises a combustion section housed in the lower part of the exterior member, The exterior member has a radiation chamber formed on its front surface. The upper end of the combustion section protrudes from the bottom surface of the radiation chamber. Inside the aforementioned radiation chamber, A cylindrical outer tube made of glass, The red-hot body housed in the outer cylinder, and are housed within the outer cylinder, The lower end opening of the outer cylinder is connected to the upper end of the combustion section. The aforementioned combustion section is A cylindrical body and A bottomed cylindrical pot housed inside the aforementioned cylindrical body, The system includes an air supply unit that supplies air into the cylindrical body, Ventilation holes are formed in the peripheral wall of the pot. A ventilation space is formed between the inner surface of the cylindrical body and the outer surface of the pot. The aforementioned ventilation space is divided into a first branch channel and a second branch channel by a partition member. The air circulates upward within the ventilation space. A portion of the aforementioned air flows into the pot from the first branch channel through the vent hole, A heating device characterized in that a portion of the air is configured to flow toward the inner surface of the outer cylinder through the second branching channel.

2. A heating device according to claim 1, The aforementioned partition member is An annular mounting portion fitted onto the outer surface of the aforementioned pot, It comprises a partition plate extending from the mounting portion into the ventilation space, A heating device characterized in that the first branch channel and the second branch channel are separated within the ventilation space by the partition plate.

3. A heating device according to claim 1, An upper plate is provided to close the upper opening of the aforementioned ventilation space. The upper plate has an air outlet hole formed therein. The lower opening of the aforementioned outlet hole is in communication with the second branched flow path, A heating device characterized in that the upper opening of the air outlet is open toward the inner circumferential surface of the outer cylinder.

4. A heating device according to claim 3, A heating device characterized in that the upper opening of the discharge hole is inclined in the circumferential direction of the outer cylinder with respect to the radial direction of the outer cylinder.

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