JP4770338B2 - Hot air heater with cooking space - Google Patents

Description

  The present invention relates to a structure of a cooking space using a heat exchanger of an oil combustor.

  A burner placed in the frame of the hot air heater, a combustion chamber is provided above the burner, and a flat upper / lower heat exchanger is provided above the combustion chamber through the exhaust communication cylinder in the frame.・ There is a cooking space that allows simple cooking between the lower heat exchanger and the exhaust tube.

  In the above structure, fuel is burned in the burner and high-temperature combustion gas is generated, and passes through the combustion chamber continuous with the burner, the upper and lower heat exchangers, and the exhaust communication cylinder. Cooking is possible in the cooking space using the radiant heat from the vessel and the exhaust tube.

  In addition, a fan is provided on the back of the frame, and a part of the air sent by the fan is passed through the heat exchanger section to be heat exchanged and discharged from the front of the frame to the room, thereby exchanging heat. In the vicinity of the bowl or cooking space, convection of air from the blower always occurs.

  For this purpose, a baffle is arranged between the cooking space and the blower, the wind sent from the blower is blocked by this baffle, and the cooking space is heated from the back so that no breeze is sent from the back. There are hot air heaters that are increasing. (See Patent Document 1)

Japanese Utility Model Publication No. 5-54912

  In the case where the wind shield is provided on the back surface of the cooking space formed between the upper and lower heat exchangers and the exhaust communication tube as described above, the wind sent from the blower flows from the vicinity of the back surface of the cooking space. However, the wind flows into the cooking space from the side, which lowers the temperature in the cooking space. In addition, the temperature of the cooking space becomes uneven due to the convection of the wind flowing into the cooking space. Moreover, since the wind from the blower always passes, the temperature of the wind shielding plate is lowered, and there is a problem that a temperature difference is generated between the front part and the rear part of the cooking space, and the wind shielding plate does not become constant.

  In addition, because the exhaust communication cylinder connecting the upper and lower heat exchangers is exposed in the cooking space, the influence of radiant heat is increased near the exhaust communication cylinder, and cooking upper baking is performed. There is a risk that it becomes uneven, a hand or the like accidentally touches the hot exhaust tube in the cooking space, or an object enters the heat exchanger and ignites. It is an object of the present invention to provide a cooking space using a heat exchanger of a hot air heater in which the temperature in the cooking space is made uniform without affecting the thermal efficiency of the hot air heater and the safety is taken into consideration.

  The present invention solves the above-described problem. A burner 2 is provided in the frame 1, a combustion chamber 3 is provided on the upper portion of the burner 2, a blower 4 is disposed on the back plate of the frame 1, and the combustion chamber 3 is provided. The upper part of the horizontal heat exchanger 5, the exhaust communication tubes 6, 6 a provided continuously on the left and right of the upper plate of the lower heat exchanger 5, and the upper heat exchanger above the exhaust communication tubes 6, 6 a 5a, and a cooking space 7 surrounded by the upper and lower heat exchangers 5 and 5a and the exhaust communication tubes 6 and 6a is formed, and air from the blower 4 is blown between the cooking space 7 and the blower 4. In the warm air heater provided with the wind shield 8 to prevent, the wind shield 8 includes a back plate 8a covering the blower 4 side of the cooking space 7 and a side plate 8b having a tip reaching the exhaust communication tubes 6 and 6a. 7 is provided with a heat insulating plate 10 extending forward from the back plate 8a with a gap 9 between the exhaust communication tubes 6 and 6a. Characterized in that to constitute a heat insulating space 11 surrounded by the back plate 8a and the side plate 8b of the cylinder 6 · 6a and air baffle plate 8.

  Also, a communication hole 13 is provided in the back plate 8a or the side plate 8b of the wind shielding plate 8 so as to communicate the heat insulation space 11 and the air flow path 12 passing through the exhaust communication cylinders 6 and 6a from the blower 4 through the wind shielding plate 8. As a result, excessive air temperature rise in the heat insulation space 11 can be prevented by convection of the air in the heat insulation space 11, and a constant high temperature can be maintained.

  Further, a guard 14 is provided in front of the exhaust communication cylinders 6 and 6a, and the guard 14 is formed continuously with the heat insulating plate 10, so that the upper and lower heat exchangers 5 and 5a and the exhaust communication cylinders 6 and 6a are connected to each other. Foreign matter did not enter, and air sent from the blower 4 and subjected to heat exchange could be blown forward, improving safety.

  In the warm air heater of the present invention, the wind shield 8 provided in the frame 1 includes a back plate 8a that covers the blower 4 side of the cooking space 7 and a side plate 8b whose tip reaches the exhaust communication tubes 6 and 6a. On both sides of the cooking space 7, a heat insulating plate 10 extending forward from the back plate 8 a with a gap 9 is provided between the exhaust communication tubes 6 and 6 a, and the heat insulating plate 10, the exhaust communication tubes 6 and 6 a, and the back of the wind shield 8 Since the heat insulation space 11 surrounded by the plate 8a and the side plate 8b is configured, the heat insulation space 11 has a higher temperature atmosphere than the radiant heat from the exhaust communication tubes 6 and 6a even if the wind shield plate 8 is cooled by the wind of the blower 4. Further, since the wind sent from the blower 4 and heat-exchanged in the exhaust communication tubes 6 and 6a flows into the heat insulation space 11 through the gap 9, the heat insulation space 11 can always maintain a high temperature state. The rear part can be kept at a high temperature, eliminating the temperature difference between the front and rear of the cooking space 7. It could be a uniform temperature.

  In addition, the heat insulating plate 10 provided on the side portion in the cooking space 7 forms a part of the heat insulating space 11, and in order to prevent direct radiant heat from the exhaust communication tubes 6 and 6 a to the cooking space 7, An excessive temperature rise in the vicinity of the communication cylinders 6 and 6a can be suppressed, and uniform radiant heat can be emitted sideways from the heat insulating plate 10 itself.

  Also, a communication hole 13 is provided in the back plate 8a or the side plate 8b of the wind shielding plate 8 so as to communicate the heat insulation space 11 and the air flow path 12 passing through the exhaust communication cylinders 6 and 6a from the blower 4 through the wind shielding plate 8. As a result, part of the wind sent from the blower 4 flows into the heat insulation space 11 through the gap 9 and the communication hole 13, so that the air convects in the heat insulation space 11, so that heat exchange is performed efficiently. It was.

  In addition, a guard 14 is provided in front of the exhaust communication cylinders 6 and 6a, and the guard 14 is formed continuously with the heat insulating plate 10, so that an object does not easily enter the air passage 12 and is sent from the air blower 4. The air that has passed through the air passage 12 and exchanged heat can be discharged to the outside of the frame body 1, and part of the air that passes through the air passage 12 collides with the guard 12 and is guided to the heat insulation space 11 along the heat insulation plate 10. Therefore, heat transfer by convection has been promoted.

  This structure will be described with reference to the drawings showing an embodiment. 1 is a frame of a warm air heater, 1a is a top plate of the frame 1, 1b is a base for the frame 1, 2 is a center of the base 1b in the frame 1 , 3 is a combustion chamber arranged continuously above the burner 2, 4 is a blower arranged on the back plate of the frame 1, 5 is a horizontally long lower heat exchanger attached to the top of the combustion chamber 3, 6 and 6a are left and right on the upper plate of the lower heat exchanger 5 and the exhaust communication cylinder extended upwards. 5a is a horizontally long upper plate like the lower heat exchanger 5 that is continuously arranged with the exhaust communication cylinders 6 and 6a. It is a heat exchanger, and the upper and lower heat exchangers 5 and 5a are arranged inside the frame 1 so as to spread laterally along the lower side of the top plate 1a. Reference numeral 15 denotes an exhaust pipe extending downward from the lower heat exchanger 5, and 16 denotes an exhaust fan connected to the exhaust pipe 15 to discharge the combustion gas after heat exchange to the outside.

  Reference numeral 17 denotes a leveler arranged on the mounting base 1b in the frame body 1, 18 denotes a fuel pump arranged on the leveler 17, 19 denotes a fuel pipe provided between the fuel pump 18 and the burner 2, 19a denotes a fuel pipe 19 The nozzle is provided at the tip of the nozzle, and the fuel is dropped from the nozzle 19 a to the bottom surface of the burner 2 through the fuel pipe 19.

  The burner 2 of the embodiment shown in the figure is composed of a pot-type burner, 20 is a pot constituting a vaporization part and a primary combustion part, 21 is an air hole opened in the side wall of the pot 20, 22 is a pot 20 inside. The wind tunnel 23 is a combustion fan that supplies combustion air to the wind tunnel 22. The combustion fan 23 sucks air from the outside and supplies it to the wind tunnel 22. The air sent to the wind tunnel 22 is an air hole. 21 to the pot 20.

  An ignition heater 24 is attached from the side surface of the pot 20 toward the inside of the pot 20, and preheats the bottom surface of the pot 20, vaporizes and ignites fuel, and 25 is an auxiliary member provided in the pot 20. The fuel dripped from the nozzle 19a into the pot 20 is vaporized at the bottom surface of the pot 20 that is heated by the ignition heater 24 or combustion heat, and combustion air supplied from the air holes 21 while performing initial combustion. The fuel vaporized by the auxiliary combustion member 25 and the combustion air are mixed and completely burned above the pot 20.

  7 is a cooking space surrounded by the upper and lower heat exchangers 5 and 5a and the exhaust communication tubes 6 and 6a, and uses the radiant heat from the upper and lower heat exchangers 5 and 5a and the exhaust communication tubes 6 and 6a. And cooking can be performed. Reference numeral 8 denotes a wind shield provided between the cooking space 7 and the blower 4. The wind shield 8 prevents the wind sent from the blower 4 from flowing from the rear portion of the cooking space 7, thereby cooking. This prevents the temperature in the space 7 from decreasing.

  Reference numeral 26 denotes a rear reflecting plate that is continuous in a semicircular shape so that the center of the front surface of the frame body 1 is open, and 26 a is a bottom reflection provided at a position parallel to the top plate 1 a at a continuous portion of the burner 2 and the combustion chamber 3. A plate 12 is a ventilation path that passes through the exhaust communication tube 6.6a from the blower 4 via the wind shielding plate 8. The wind sent from the blower 4 passes through the combustion chamber 3 and the ventilation path 12 from the upper part of the rear reflector 24. When passing, it is heat-exchanged and released into the room from the front of the frame 1.

  However, in the case where the wind shield 8 is provided between the cooking space 7 and the blower 4, the wind sent from the blower 4 flows from the side of the cooking space 7, and the wind shield 8 is always used as the blower. Since the wind from 4 comes into contact, temperature variation occurs in the cooking space 7 due to the temperature drop at the rear of the cooking space 7 and the influence of the convection of the flowing air, so that heating cooking cannot be performed uniformly. In addition, it is necessary to keep the cooking space 7 constant at high temperatures.

  This invention solves this problem, 8a is a back plate that covers the fan 4 side of the cooking space 7, 8b is a side plate that is provided continuously to the back plate 8a so that the tip reaches the exhaust communication tubes 6 and 6a. The wind shield 8 is composed of a back plate 8a and a side plate 8b, 10 is a heat insulating plate disposed on both sides of the cooking space 7 and extended forward from the back plate 8a, 9 is a heat insulating plate 10 and an exhaust communication cylinder 6 Reference numeral 11 denotes a heat insulation space formed so as to be surrounded by the heat insulation plate 10, the exhaust communication cylinders 6 and 6a, the back plate 8a of the wind shielding plate 8, and the side plate 8b.

  In this structure, the wind sent from the blower 4 is guided to the blower path 12 by the rear reflector 26, and at this time, the wind does not flow into the cooking space 7 but is discharged from the front of the frame 1, and the blower path 12. Part of the wind that has passed through and has been subjected to heat exchange collides with the heat insulating plate 10 and flows into the heat insulating space 11 through the gap 9.

  And the heat insulation space 11 becomes a high temperature atmosphere by the radiant heat from the exhaust communication tubes 6 and 6a, and the heat exchanged air sent from the blower 4 through the gap 9 flows into the heat insulation space 11 constantly in a high temperature state. Since it can be maintained, the rear of the cooking space 7 in contact with the heat retaining space 11 can be maintained at a high temperature by the heat from the heat retaining space 11, and the temperature difference between the front and rear in the cooking space 7 is eliminated. I was able to.

  Further, the heat insulating plate 10 provided from both sides of the cooking space 7 through the gap 9 constitutes a part of the heat insulating space 11, and the heat insulating plate 10 prevents convection by preventing the flow of air into the cooking space 7. The inside of the cooking space 7 can be heated to a uniform and high temperature without being influenced by the heat, and the heat insulating plate 10 is excessively heated in the vicinity of the exhaust communication tubes 6 and 6a in order to block the direct radiant heat from the exhaust communication tubes 6 and 6a. The heat is transmitted to the heat insulating plate 10 and uniform radiant heat can be emitted from the heat insulating plate 10 itself to the side of the cooking space 7.

  On the other hand, in the embodiment shown in FIG. 2, reference numeral 13 denotes a communication hole that connects the heat insulation space 11 provided in the back plate 8 a or the side plate 8 b of the wind shield 8 and the air passage 12, and the air passage 12 and the heat insulation space 11. Ventilation with can be performed.

  For this reason, since the internal pressure of the heat insulation space 11 is lowered and the air into the heat insulation space 11 is easily convected, heat exchange of the wind sent from the blower 4 is performed efficiently, and the gap 9 Since the amount of air flowing into the heat insulation space 11 from the communication hole 13 is not large, the heat exchange effectively works while keeping the heat insulation space 11 at a high temperature.

  Reference numeral 14 denotes a guard provided continuously to the heat insulating plate 10 in front of the exhaust communication tubes 6 and 6a. The guard 14 has a lattice shape and is provided with a cut-out portion, and is sent from the blower 4 to exchange heat. The wind is discharged into the room from the extracted part of the guard 14.

  By providing the guard 14 as described above, objects can easily enter high-temperature parts such as the upper and lower heat exchangers 5 and 5a and the exhaust communication tubes 6 and 6a, and the hands and the like are mistakenly hot. Safety is improved because the upper and lower heat exchangers 5 and 5a and the exhaust communication tubes 6 and 6a are not touched.

  Further, when the wind passing through the air blowing path 12 is released from the guard 14, a part of the wind collides with the guard 14 and is guided to the heat insulation space 11 along the heat insulation plate 10. Heat transfer by convection is promoted in the air flow path 12 so that the temperature in the heat insulation space 11 can be maintained at a uniform and high temperature without excessively rising, and heat exchange is also efficiently performed, leading to an improvement in thermal efficiency. It was.

  Furthermore, since the back plate 8a that covers the rear part of the cooking space 7 is attached, the wind sent from the blower 4 flows upward along the back plate 8a in addition to passing through the blower path 12, and the top plate 1a and the top plate 1a It passes between the heat exchangers 5a and is discharged from the front to the outside of the frame 1, and low-temperature air flows between the top plate 1a and the upper heat exchanger 5a to exchange heat with the heat of the upper heat exchanger 5a. Therefore, the surface of the top plate 1a can be kept at a low temperature, and the safety and handling are improved.

  Reference numeral 14a denotes an upper guard provided at an upper portion of the cooking space 7 through a gap with a lower plate of the upper heat exchanger 5a, and the upper heat exchanger 5a is positioned in the cooking space 7 as it is. Therefore, the upper guard 14a does not directly touch the high heat upper heat exchanger 5a, and 27 is a grill stand provided at the bottom of the cooking space 7, which is used for cooking. Radiant heat from the lower heat exchanger 5 is not directly transmitted to the object to be cooked, and is heated in a high-temperature atmosphere of the cooking space 7, so that there is no uneven baking.

  Further, the high-temperature exhaust gas generated from the burner 2 and sent to the combustion chamber 3 passes through the lower heat exchanger 5 in the order of the exhaust communication cylinder 6, the upper heat exchanger 5a, and the exhaust communication cylinder 6a, so that these heat radiating portions Since the high-temperature exhaust gas inflow side is hotter than the outflow side, the blower 4 provided on the back surface of the frame 1 is installed closer to the exhaust communication tube 6 side than the center. The amount of air sent to the path 12 can be adjusted to prevent a temperature difference exerted on both sides of the cooking space 7.

It is a front longitudinal cross-sectional view of the warm air heater provided with the heat exchanger which shows the Example of this invention. It is an upper surface cross-sectional view of the heat exchanger part of the warm air heater of the Example of this invention. It is a side longitudinal cross-sectional view of the warm air heater of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame 2 Burner 3 Combustion chamber 4 Blower 5 Lower heat exchanger 5a Upper heat exchanger 6 Exhaust communication cylinder 6a Exhaust communication cylinder 7 Cooking space 8 Wind shield 8a Back plate 8b Side plate 9 Gap 10 Heat insulation plate 11 Heat insulation space 12 Air blow Route 13 Communication hole 14 Guard

Claims (3)

A burner 2 is provided in the frame 1, a combustion chamber 3 is provided in the upper part of the burner 2, a blower 4 is disposed on the back plate of the frame 1, and a horizontally long lower heat exchanger 5 is disposed in the upper part of the combustion chamber 3. The upper and lower heat exchangers 5 and 6a are connected to the left and right of the upper plate of the lower heat exchanger 5 and the upper heat exchanger 5a is provided above the exhaust communication tubes 6 and 6a. A cooking space 7 surrounded by 5a and the exhaust communication cylinders 6 and 6a is configured, and a wind shielding plate 8 is disposed between the cooking space 7 and the blower 4 to prevent wind sent from the blower 4. In hot air heaters,
The wind shielding plate 8 includes a back plate 8 a that covers the fan 4 side of the cooking space 7, and a side plate 8 b that has a tip reaching the exhaust communication tube 6, 6 a, and the exhaust communication tube 6, 6 a on both sides of the cooking space 7. Is provided with a heat insulating plate 10 extending forward from the back plate 8a through a gap 9,
A hot-air heater provided with a cooking space, characterized in that a heat-retaining space 11 surrounded by the heat-retaining plate 10, the exhaust communication tubes 6 and 6a, the back plate 8a and the side plate 8b of the wind shielding plate 8 is formed.   The back plate 8a or the side plate 8b of the wind shield plate 8 is provided with a communication hole 13 for connecting the heat insulation space 11 and the air flow path 12 passing through the exhaust communication cylinders 6 and 6a from the blower 4 through the wind shield plate 8. The hot air heater according to claim 1. The warm air heater according to claim 1, wherein a guard 14 is provided in front of the exhaust communication cylinders 6 and 6a, and the guard 14 is formed continuously with the heat insulating plate 10.

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