JPH02110250A - Hot air oil heater - Google Patents

Abstract

PURPOSE:To inhibit the upper part of amain body case to a low temperature, prevent a scald, and receive boiled soup spilled from a heated matter with a drain pan even when the upper heating surface of a heating unit is heated by passing air outside a main body into an air passage formed between the heating unit and the drain pan which surrounds the outer periphery of aid heating unit during its application. CONSTITUTION:When it is necessary to use this equipment as a hot air heater, an attempt must be made to place a movable cylinder to a position depicted in a chain line and close the bottom of a fixed cylinder 27 with its flange 28a. Under this state a lower part combustion heat flow passage 31a is blocked, which prevents combustion heat from a combustion chamber 8 from flowing to a heating unit 17. A top heating surface 13 formed on a heating material 20 of the heating unit 17 is immune to heat or high temperature and eliminates a danger of burn. When this equipment is used for both hot air heating and heating or insulation of a heated matter, a heated matter 16 is placed on the heating surface 13. Then, the movable cylinder 28 moves from the position depicted in a chain line to a position depicted in a solid line, thereby producing communication between the movable cylinder 28 and the fixed cylinder 27 and driving a ventilation a fan 9. As a result, combustion heat is fed to the heating unit 17. It is, therefore, possible to receive boiled soup spilled from a heated matter with a drain pan 18.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an oil hot air heater capable of keeping or heating objects to be heated such as pots and kettles.

[Prior Art] Fig. 4 and Fig. 5 are a partially sectional front view and a cross-sectional view showing the configuration of a conventional oil hot air heater. In these figures, ■ is the cartridge tank, 2 is the oil pan,
3 is an electromagnetic pump, 4 is a combustor 5 is a pump 3 from an oil pan 2
6 is a blower that sends combustion air to the combustor 4, 7 is a combustion tube, 8 is a combustion chamber,
A blower fan 9 is provided behind this, and a hot air outlet 10 is communicated with the front. 11 is the main case, 12
is a bottom plate, 14 is a heat transfer tube, the lower end of which is opened above the combustion tube 7, the upper end is closed to form a heating surface 13, and has a flat shape so that an object to be heated 16 such as a pan can be placed on it. In addition, a hole 15 provided on the top surface of the main body case 11
It is exposed outside of this case.

Next, the operation will be explained.

Combustion heat from the combustor 4 passes through the combustion tube 7, is mixed with cold air from the blower fan 9 in the combustion chamber 8, becomes appropriately heated air, and is discharged into the room from the hot air outlet 10. At this time, part of the combustion heat from the combustor 4 enters through the lower end opening of the heat transfer cylinder 14, and the upper end heating surface 13 is heated. As a result, the heated object 16 is placed on the upper end heating surface 13 of the heat transfer tube 14.
The heated object 16 can be heated with hot air or heated at the same time as room heating.

[Problems to be Solved by the Invention] Since the conventional hot air heater is configured as described above, the heat transfer tube 14 is heated to a high temperature, and this heat is transferred from the upper end heating surface 13 of the heat transfer tube 14 to the main body case. 4, so there is little consideration given to safety against burns, etc.
Another problem is that it is difficult to clean spilled liquid and dirt from pans, kettles, etc.

This invention was made in order to solve the above-mentioned problems, and its purpose is to provide a warm air heater that has less risk of burns and can easily clean spilled liquid. It is something to do.

[Means for Solving the Problems 1] In the oil hot air heater according to the present invention, the upper end heating surface of the heating unit removably provided in the upper part of the main body case is exposed to the inner peripheral side of the hole provided in the upper surface of the main body case. A drain plate that surrounds the outer periphery of the heating unit is fixed inside the main body case, and an air flow path is formed between the drain plate and the heating unit through which air from outside the main body case is flowed by the blower fan. A flow path through which combustion heat flows from the combustion chamber is separably formed into a heating unit side and a combustion chamber side within the unit.

[Function] During use, the oil hot air heater according to the present invention is configured to use a blower fan to flow indoor air from outside the main body case through the air flow path formed between the outer periphery of the heating unit and the drain tray. Therefore, even if the upper heating surface of the heating unit is heated, the temperature of the upper part of the main body case can be kept low enough to prevent burns. In addition, even if liquid boils over from an object to be heated such as a pan placed on the upper heating surface of the heating unit, it can be caught in the drain pan.Furthermore, by removing the heating unit when not in use, the drain tray can be used to remove dirt and other items from the fish. Spilled liquid can be easily cleaned up.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

1 and 2, the same reference numerals as in FIGS. 4 and 5 indicate corresponding parts, 17 is a heating unit, 18 is a planar annular drain plate that surrounds the outer periphery of the heating unit 17 and has an open top surface; Reference numeral 19 denotes a drain pipe whose upper end is connected to the lowest part of the bottom of the drain dish 18 and whose lower end is opened at a suitable location inside or outside the machine. As shown in FIG. 3, the heating unit 17 is connected to the upper flange 2 of the external duct member 21.
The upper flange 22a of the internal duct member 22 is fixed on the upper part of the inner duct member 22. The upper end heating surface 1 is fitted into the inner circumferential side of the hole 15 formed on the upper surface and is formed by the upper end surface of the heat transfer member 20.
3 is located somewhat above the top surface of the main body case 11 and exposed.

Further, the feet 23 provided at a plurality of locations in the circumferential direction of the external duct member 21 are supported by the bottom of the drain pan 18, and the heating unit 17 is removably attached to the main body case 1 through the drain pan 18.
1 is supported. An upper combustion heat flow passage 24 is formed that extends from inside the internal duct member 22 to between the internal duct member 22 and the heat transfer member 23 and between the internal duct member 22 and the external duct member 21.

Note that 22b is a communication hole provided in the flange 22a of the internal duct member 22. 25 is the upper wall of the combustion chamber 8 which is fixed to the main body case 11 and has the drain tray 18 fixed to the upper surface, 26 is the lower duct member provided between the combustion tube 7 and the upper wall 25, and 27 is the lower part. Lower wall 26 of duct member 26
A fixed cylinder protruding above a, 28 is a lower wall 26a of the partition machine 26
Movable cylinder with upper flange 28a supported on the lower surface, 2
9 is a movable cylinder guide fixed to the lower wall 27a and the upper flange 28a is slidably engaged; 30 is a movable cylinder 28;
31a is an inner lower combustion heat flow path formed in the movable cylinder 28 and the fixed cylinder 27, and 31b is a drive unit for switching the communication position with the fixed cylinder 27 and the communication cutoff position by the flange 28a; This is an outer lower combustion heat flow passage formed between the lower wall 26a and the upper wall 26b, in which the internal duct member 22 of the heating unit 17 is slidably fitted into the fixed cylinder 27, and the external duct member 21
is slidably fitted into the hole 26c of the earthen wall 26b, so that the upstream and downstream ends of the upper combustion heat flow passage 24 are separably connected to the lower combustion heat flow passages 31a and 31b, and the heating unit 17 is connected from the combustion chamber 8 to the heating unit 17. A combustion heat flow path is formed that passes through the inside and reaches the upper part of the hot air outlet 10 of the main body case 11. 3
Reference numeral 2 denotes an air flow path for flowing air outside the main body case 11 between the drain tray 18 and the heating unit 17, and this air flow path 32 has an intake port 32a facing the outer periphery of the blower fan 9 and is connected to the combustion chamber. 8 upper wall 25 and upper wall 26 of lower duct member 26
b, and is opened between the drain tray 18 and the heating unit 17.
It reaches the upper end of the hot air outlet lO through the outer periphery of the hot air outlet lO, is branched between the drain tray 18 and the heating unit 17, and is opened between the wall of the hole 15 of the main body case 11 and the heat transfer member 20. ing. Note that 4a is a burner head of the combustor 4 provided on the internal bottom surface of the combustion tube 7.

Next, the operation of the oil hot air heater according to this embodiment will be explained.

First, in order to use it as a normal hot air heater, the movable cylinder 2
8 to the position indicated by the chain line in FIG.
Leave the bottom end of 7 closed. In this state, the lower combustion heat flow passage 31a is blocked, so that combustion heat does not flow from the combustion chamber 8 to the heating unit 17. Therefore, the upper end heating surface 13 formed on the heat transfer member 20 of the heating unit 17
does not get hot, and there is no risk of burns if your hands or the like touch this heating surface 13. Note that the operations in this case other than those described above are substantially the same as those shown in FIGS. 4 and 5.

Next, in order to use both hot air heating and heating or keeping the heated object warm, if the heated object 16 such as a pan or kettle is placed on the upper heating surface 13 of the heating unit 17, an electrical connection (not shown) is applied. The drive unit 30 is driven by the detection mechanism, and the movable cylinder 28 moves from the position shown by the chain line in FIG. 2 to the position shown by the solid line. Therefore, the movable cylinder 28 and the fixed cylinder 27 are communicated with each other, and combustion heat is sent to the heating unit 17 by operating the blower fan 9. That is, a part of the high-temperature combustion gas coming out of the combustion tube 7 passes through the combustion chamber '8, the inner lower combustion heat flow passage 31a and the upper combustion heat flow passage 24, and heats the heat transfer member 20 of the heating unit 17. , heat exchanges with the object to be heated 16 placed on the upper end heating surface 13 of this member 20. Through this heat exchange, the heated object 16 is heated or kept warm, and the temperature of the combustion gas is slightly lowered, and then it passes through the upper combustion heat flow passage 24 and the outer lower combustion heat flow passage 31b, and is discharged into the room from the upper part of the hot air discharge port 10. be done. The remaining part of the combustion gas discharged from the combustion tube 7 is mixed with the indoor air from the blower fan 9 as in normal operation, and is turned into appropriately heated air and discharged into the room from the hot air outlet 10.

An intake port 32a facing the outer peripheral portion of the blower fan 9
Indoor air is taken into the air flow path 32 from the outside, passes between the outer periphery of the heating unit 17 and the drain pan 18 , a portion is discharged into the room from the hole 15 on the top surface of the main body case 11 , and the rest enters the hot air outlet 10 . During this time, heat is exchanged with the heating unit 17, drain pan 18, and main body case 11, so that the main body case 11 is prevented from becoming hot due to heating of the heating unit 17 and the combustion heat flow path.

Note that this indoor air circulation through the air flow path is also performed during normal operation, and in this case, the main body case 11. The heating unit 17 is prevented from becoming hot.

Furthermore, even if boiled liquid comes out from the heated object 16 such as a pot or kettle, it will be collected by the drain tray 18 and dirt or dust will fall from between the heating unit 17 and the wall of the hole 15 on the top surface of the main body case 11. It can also be received by the drain tray 18, so
Boiled liquid and garbage.

Prevents debris from entering the inside of the device. If the drain pan 18 becomes dirty, as shown in FIG. The fitting part with the hole 26c provided in the wall 26b can be separated, so when the operation is stopped and the heating unit 17 is not hot, remove it upward and insert the drain tray 18 into the hole on the top of the main body case II. It can be easily cleaned from 15.

In addition, in this invention, the movable cylinder may be moved manually from outside the main body case, and the lower combustion heat flow passage on the inside is always kept open, and the upper combustion heat flow passage and the lower combustion heat flow passage on the outside are kept open. The heating unit may also be heated by passing combustion heat through it. In this case, air outside the main body case, such as indoor air, can be passed through the air flow passage and flowed between the drain pan and the heating unit to heat the heating unit. The temperature of the unit and the upper part of the main body case can be suppressed to a temperature that does not cause burns.

[Effects of the Invention] As explained above, according to the present invention, during use, the air outside the main body case is pumped by the blower fan into the air flow path formed between the heating unit and the drain tray surrounding the outer periphery of the heating unit. Even if the upper heating surface of the heating unit is heated, the upper part of the main body case can be kept at a low temperature to prevent burns. Even if the liquid boils over from the heated object, it will be caught in the drain pan and will not get inside the equipment.Furthermore, by removing the heating unit from the drain pan, you can easily clean up the spilled liquid along with the garbage that has fallen into the drain pan. There is an effect.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing an oil hot air heater according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the same, Fig. 3 is an isolated enlarged sectional view of the main parts, and Fig. 4 is a conventional oil hot air heater. FIG. 5 is a partially cross-sectional front view showing the oil hot air heater, and FIG. 5 is a cross-sectional view thereof. 1... Cartridge tank, 2... Oil pan, 3...
・Pump, 4... Combustor, 7... Combustion tube, 8...
Combustion chamber, 9...Blower fan, 10...Hot air discharge port,
11... Main body case, 13... Upper end heating surface, 15.
... Hole, 16... Heated object, 17... Heating unit, 18... Drain plate, 20... Heat transfer member, 21.2
2... External, internal duct member, 23... Leg, 24...
... Upper combustion heat flow passage, 25 ... Earthen wall of combustion chamber, 26
...Lower duct member, 27...Fixed tube, 28...
Movable tube, 30... Drive unit, 31a. 31b... Lower combustion heat flow path, 32... Air flow path. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. 3113 cause

Claims (1)

[Claims] In an oil hot air heater that discharges warm air from a combustion chamber provided in a main body case to the outside of the main body case using a blower fan, a heating unit is removably provided in the upper part of the main body case, and the heating unit is provided with a removable heating unit. The upper end heating surface on which the object to be heated is placed is exposed to the inner circumference of the hole provided on the top surface of the main body case, and a drain plate that surrounds the outer periphery of the heating unit is fixed inside the main body case, and the drain plate and the heating unit are connected to each other. In addition to forming an air flow path through which air from outside the main body case is flowed by the blower fan, a flow path through which combustion heat is circulated from the combustion chamber into the heating unit can be separated into a heating unit side and a combustion chamber side. An oil hot air heater characterized by having the following features: