JPH1163669A - Hot air type heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To get a comfortable feeling of heating by lowering the temperature of hot air and lessen the unevenness of temperature of hot air with simple constitution, relating to a hot air type heater. SOLUTION: This hot air type heater is so constituted as to pass a part of the air supplied from a blower 30 through an opening brought into existence by a cut and erected part, being provided with the cut and erected part 32 at the proper place of a combustion cylinder 29 so as to regulate the air current from a blower 30, thus the unevenness of blow is dissolved by regulating the air current, and also the temperature of the hot air is lowered by reducing the pressure loss within the duct and increasing the quantity of hot air, and further such combustion state that the length of the flame is short is made to lower the temperature of the combustion cylinder 29, by increasing the quantity of primary air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warm air heater for heating indoor air by mixing indoor air and combustion gas.

[0002]

2. Description of the Related Art FIG.
As shown in FIG. 8, fuel is supplied to the tank 1 from the cartridge tank 2, and supplied to the vaporizer 4 by the pump 3. Then, the fuel is vaporized by the vaporizing section 4 kept at a high temperature to become a vaporized gas, supplied to the burner section 5, and burned there. The generated high-temperature combustion exhaust gas is guided upward by a combustion cylinder 6 arranged so as to cover the periphery of the burner section 5.
In the duct 7 covering the combustion tube 6, the air is mixed with the indoor air flow from the blower 8, and is blown out as warm air from the hot air outlet 9. Further, since the blower 8 is provided on the rear surface of the main body and suctions indoor air by a propeller fan and blows the air, the sucked air is blown forward while scrolling according to the bending direction of the propeller fan. Was blown in a one-sided direction. For this reason, the airflow in the duct 7 is in a turbulent state, and there are problems such as an increase in loss and unevenness of the hot air blown out from the hot air outlet 9. A device such as attaching a current plate to the inner surface of the device 7 has been devised.

[0003]

However, even in the configuration in which the flow control plate is provided on the inner surface of the duct 7 as in the above-described conventional case, since much air supplied from the blower 8 flows around the combustion tube 6, the inside of the duct 7 The effect of restricting the air flow is small. In particular, the air flow in a portion where the combustion gas from the opening 6a of the combustion cylinder 6 and the air from the blower 8 are mixed is in a turbulent state, the loss increases, and the air volume increases. Decrease or
There is a problem that the hot air blown out from the hot air outlet 9 becomes uneven.

Therefore, in order to solve the above-mentioned problem without changing the structure of the blower 8, the opening area of the blow-out port 9 is increased, or the air flow is made more complicated by using a more complicated structure of a ventilation plate on the inner surface of the duct 7. The only method was to control the flow or to increase the amount of air blow by increasing the motor speed of the blower 8.

[0005] However, it is difficult to increase the area of the outlet 9 due to dimensional restrictions on the main body of the equipment.
There has been a problem that the temperature of the hot air is partially uneven.

The method of providing a complicated structure of the flow control plate on the inner surface of the duct 7 deteriorates the assemblability of the equipment body,
There has been a problem that performance varies due to a change in the mounting angle.

Furthermore, the method of increasing the motor speed of the blower 8 to increase the air flow increases the noise and lowers the temperature of the warm air, and reduces the amount of air blown by dust and the like attached to the blower. In addition, there is a problem that the overheat prevention device 11 becomes difficult to operate.

[0008] The present invention has been made in view of the above problems,
An object of the present invention is to provide a comfortable heating feeling by reducing the temperature of the hot air with a simple configuration and without increasing the size of the device main body, and reducing the temperature unevenness of the hot air.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a main body case, a blower provided on the back of the main body case, a tank for storing fuel in the main body case, and fuel from the tank. A pump for sucking and discharging, a vaporizing section for vaporizing fuel supplied by the pump, a burner section for burning vaporized gas from the vaporizing section, and a cover for covering the burner section and for guiding the combustion exhaust gas generated in the burner section upward. A combustion cylinder, and a box-shaped duct that covers the combustion cylinder and mixes flue gas and indoor airflow from a blower to form a hot air path; It is configured to control the airflow from

According to the above invention, a substantially vertical cut-and-raise is provided at an appropriate position in the combustion cylinder where the flow of the air supplied from the blower is concentrated, so that the air flow supplied from the blower is controlled and the hot air is blown. Because it can be guided to the outlet, it is possible to equalize the state of hot air from the hot air outlet and the temperature of the hot air, reduce the pressure loss in the duct, and change the size of the main body and the number of revolutions of the blower Thus, a predetermined amount of warm air can be secured.

Further, by passing a part of the air supplied from the blower through the switching opening formed by switching the combustion cylinder through the combustion cylinder, an ejector effect is generated at the combustion cylinder opening, and The amount of gas passing increases. In other words, the amount of primary air, which is the combustion air, increases, a combustion completion time is short, and a combustion state with a short flame length is formed. Thus, it is possible to lower the combustion cylinder temperature and improve the durability. it can.

Furthermore, since the pressure loss is reduced by suppressing the air flow in the duct and the amount of air is increased, the temperature of the warm air during normal combustion can be reduced. The change width of the hot air temperature when the air volume decreases can be made large, and the operation of the overheat prevention device can be reliably performed. In particular, the above-mentioned phenomenon appears remarkably on the downstream duct surface in the extension of the raising and lowering of the combustion cylinder, and a more reliable operation can be performed by attaching an overheat prevention device to that portion.

Since the flow control plate is formed by cutting the appropriate portion of the combustion cylinder in a substantially vertical direction, there is no problem that the assemblability of the device main body is deteriorated and the performance is varied due to a change in the mounting angle. , Comfortable heating can be provided.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first aspect of the present invention provides a main body case, a blower provided on the back of the main body case, a tank for storing fuel in the main body case, a pump for sucking and discharging fuel from the tank, and the pump. A vaporizing section for vaporizing the fuel supplied by the fuel cell, a burner section for burning the vaporized gas from the vaporizing section, a combustion cylinder covering the burner section and guiding the combustion exhaust gas generated in the burner section upward, and the combustion cylinder. A box-shaped duct that forms a hot air path by mixing the covering combustion exhaust gas and the indoor air flow from the blower, wherein the combustion cylinder is provided with a cut-and-raised position to control the air flow from the blower It is configured as follows.

A substantially vertical cut-and-raise is provided at an appropriate position of the combustion cylinder where the flow of the air supplied from the blower is concentrated, so that the air flow supplied from the blower is controlled and guided to the hot air outlet. Therefore, it is possible to make the blow-out state from the hot-air outlet and the hot-air temperature uniform, reduce the pressure loss in the duct, and change the size of the main body and the number of rotations of the blower to a predetermined value. The amount of hot air can be secured.

[0016] Further, by passing a part of the air supplied from the blower through the cut-and-raised opening generated by cutting the combustion cylinder through the combustion cylinder, an ejector effect is generated at the combustion cylinder opening. The amount of combustion gas passing increases. In other words, the amount of primary air, which is the combustion air, increases, a combustion completion time is short, and a combustion state with a short flame length is formed. Thus, it is possible to lower the combustion cylinder temperature and improve the durability. it can.

Further, since the pressure loss is reduced by suppressing the air flow in the duct and the amount of air is increased, the temperature of the hot air during normal combustion can be reduced. The change width of the hot air temperature when the air volume decreases can be made large, and the operation of the overheat prevention device can be reliably performed. In particular, the above-described phenomenon appears remarkably on the downstream duct surface in the extension of the raising and lowering of the combustion cylinder, and a more reliable operation can be performed by attaching an overheat prevention device to that portion.

Since the flow control plate is formed by cutting the right part of the combustion cylinder in a substantially vertical direction, there is no problem that the assemblability of the device main body is deteriorated and the performance is varied due to a change in the mounting angle. , Comfortable heating can be provided.

Further, the second aspect of the present invention is configured such that a cut-and-raised portion is provided near the opening of the combustion cylinder. And, since the cut-and-raised portion is provided in the vicinity of the combustion cylinder opening from which the combustion gas flows, when a part of the airflow from the blower passes through the cut-and-raised opening portion generated by the cut-and-raised portion, the combustion occurs. The ejector effect of sucking gas can be remarkably exhibited, and the temperature of the combustion cylinder can be lowered by forming a stable combustion state with a short flame length, so that the durability of the combustion cylinder is improved and the combustion cylinder is improved. Since the internal pressure is also reduced, stable combustion can be obtained.

Further, a third aspect of the present invention has a configuration in which a cut-and-raised portion is provided on the upper portion of the combustion cylinder. And, by providing the cut-and-raised portion on the upper part of the combustion cylinder, the airflow from the blower will be controlled relatively upstream, so it is necessary to greatly reduce the duct loss and secure sufficient airflow. Suppresses temperature rise and can be used safely for a long time. Further, even when the hot air outlet is closed, the combustion gas from the opening of the combustion cylinder and the airflow from the cut and raised opening are offset by each other, and the pressure applied to the inside of the combustion cylinder becomes difficult to increase, There is no need to worry about abnormal combustion such as an extremely long flame, and stable combustion can be obtained.

According to a fourth aspect of the present invention, the cut-and-raised opening is opened in the direction of the air flow from the blower.

[0022] Then, a large amount of air supplied from the blower is cut and raised and passed through the opening, so that the ejector effect at the opening of the combustion cylinder is more remarkably exhibited, thereby achieving stable combustion and combustion. The cylinder temperature is reduced.

According to a fifth aspect of the present invention, the overheat prevention device is provided on a duct surface which is cut and raised on a blowing path from the blower and is located downstream of the duct.

The air flow in the duct is controlled to reduce the pressure loss, and the amount of air is increased to reduce the temperature of the warm air during normal combustion. In this case, the variation range of the hot air temperature is made large so that the operation of the overheat prevention device is ensured. In particular, the above-mentioned phenomenon appears remarkably on the downstream duct surface in the extension of the raising and lowering of the combustion cylinder, and a more reliable operation can be performed by attaching an overheat prevention device to that portion.

[0025]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view of a hot air heater according to Embodiment 1 of the present invention. FIG. 2 is a sectional view of a main part of the burner. FIG. 3 is a perspective view showing the duct 31 with a part cut away.

In FIGS. 1, 2 and 3, reference numeral 20 denotes a main body case, and a tank 21 for holding a liquid fuel at a lower side thereof.
A detachable cartridge tank 22 is disposed above the tank 21. Reference numeral 23 denotes a pump mounted on the upper surface of the tank 21, and supplies a fuel from an upper end thereof to a vaporizing section 25 through an oil feed pipe 24. Reference numeral 26 denotes a nozzle unit for vertically ejecting the fuel gas vaporized by the vaporizing unit 25. The vaporized fuel ejected from the nozzle unit 26 is drawn downstream of the vaporizing unit 25 while sucking primary air by an ejector effect. The gas is jetted into a mixing pipe 27 provided at a distance, mixed there, supplied to a burner section 28, and burned there. The burner portion 28 is covered with a combustion tube 29 arranged to guide the generated combustion gas upward.
A blower 30 for taking in and sending out the indoor air flow is disposed at the back of the fan. Reference numeral 31 denotes a duct that mixes the high-temperature gas from the combustion cylinder 29 and the indoor air flow from the blower 30 to form a hot-air blowing path.

The combustion cylinder 29 is provided with a cut-and-raised portion 32 at an appropriate position so as to control the air flow from the blower 30.
In the present embodiment, a configuration provided above the combustion cylinder will be described, but any location where equivalent effects can be obtained may be used.

A control unit 33 controls the pump 23 and the vaporizing unit 25 to burn the burner unit 28. The control unit 33 controls the pump 2 based on an operating condition signal input from an operating unit (not shown).
3 and the vaporizing section 25 are controlled in a predetermined sequence.

In the above configuration, the cartridge tank 2
The liquid fuel supplied to the tank 21 so as to maintain a constant oil level from 2 is sucked up from the tank 21 by the pump 23 and sent to the vaporizer 25 via the oil feed pipe 24. The sent fuel is vaporized in the vaporizing section 25 maintained at a predetermined temperature or higher by the heater, becomes a high-temperature vaporized gas, and is ejected from the nozzle section 26. At this time, the primary air is sucked by the ejector effect and the vaporizing section 25 is sucked. Is jetted into a mixing pipe 27 provided at a distance downstream of the mixer, mixed there, supplied to the burner section 28, and jetted from a flame hole 28a of the burner section 28.

The mixed gas of fuel and air ejected from the flame hole 28a of the burner portion 28 forms a flame in the flame hole 28a of the burner portion 28 by ignition means (not shown), and starts combustion. Even if the pump 23 is stopped, if the pump 23 continues to supply the fuel to the vaporizing section 25, the combustion will continue. Then, the generated high-temperature combustion exhaust gas flows above the combustion cylinder 29, is mixed with the indoor air flow from the blower 30 in the duct 31, is discharged as warm air, and is used for heating.

Since the cut-and-raised portion 32 is provided at the upper part of the combustion tube 29 so as to control the air flow from the blower 30, the air flow supplied from the blower 30 while scrolling is provided. The airflow is controlled by the fins 32, and the air can be led to the hot air outlet as a uniform air blowing form, so that the temperature unevenness of the hot air can be reduced.

Further, the pressure loss in the duct can be reduced by the above-mentioned flow control effect, and a predetermined amount of hot air can be secured. Therefore, the size of the device body and the number of rotations of the blower are increased to reduce the amount of hot air. There is no need to secure it.

Further, a part of the air supplied from the blower 30 is passed through the combustion cylinder 29 through the opening 32a through a part of the upper part of the combustion cylinder 29, so that the combustion gas at the combustion cylinder opening 29a. This causes an ejector effect of sucking air, which increases the amount of combustion gas passing therethrough. That is, the amount of primary air, which is combustion air, increases, the combustion completion time is short, and a combustion state with a short flame length is formed. Can be improved.

Since the flow control plate 32 is formed by cutting an appropriate position of the combustion cylinder 29 in a substantially vertical direction, the assemblability of the device main body is deteriorated, and the performance varies due to a change in the mounting angle. No, it is possible to provide comfortable heating.

(Embodiment 2) FIG. 4 is a perspective view of a hot air heater according to a second embodiment of the present invention, in which a part of a duct 31 is cut away.

In FIG. 4, the opening 29a of the combustion cylinder 29
A cut-and-raised portion 32 is provided in the vicinity. In the above configuration, the cut-and-raised portion 32 is provided in the vicinity of the combustion cylinder opening 29a from which the combustion gas flows out, so that when a part of the airflow from the blower passes through the cut-and-raised opening portion 32a, the combustion gas The ejector effect of sucking the gas is remarkably exhibited, and a large amount of the combustion gas is sucked, so that the amount of primary air is greatly increased and a stable combustion state with a short flame length is formed. As a result, the temperature of the combustion cylinder can be further reduced, the durability of the combustion cylinder is improved, and the pressure in the combustion cylinder is also reduced, so that stable combustion can be obtained.

(Embodiment 3) FIG. 5 is a perspective view in which a part of a duct 31 of a hot air heater according to Embodiment 3 of the present invention is cut away.

In FIG. 5, the overheat prevention device 34 is cut and raised on a blowing path from the blower 30 and provided on the duct surface 31 downstream of the opening 32a.

With the above configuration, the air flow from the blower 30 is controlled by the cut-and-raised portion 32 provided above the combustion cylinder 29,
The pressure loss in the duct 31 is reduced, the amount of warm air is increased to decrease the temperature of warm air during normal combustion, and the change of the warm air temperature when dust is attached to the inlet of the blower 30 and the amount of blow air is reduced. By increasing the width, the operation of the overheat prevention device 34 is ensured. In particular, on the downstream duct surface in the extended war of the cut-and-raised portion 32 of the combustion cylinder, the difference in the hot air temperature between normal combustion and dust adhesion appears remarkably,
If the overheat prevention device 34 is attached to that portion, a more reliable operation can be performed.

[0041]

As described above, according to the warm air heater of the first aspect, the cut-and-raise in the substantially vertical direction is provided at an appropriate position of the combustion cylinder where the flow of air supplied from the blower is concentrated. Since the supplied air flow is controlled and guided to the hot air outlet, the state of the hot air outlet and the hot air temperature can be made uniform and the pressure loss in the duct can be reduced. A predetermined amount of warm air can be secured without changing the size of the main body or the number of revolutions of the blower.

Further, by passing a part of the air supplied from the blower through the opening of the combustion cylinder through the combustion cylinder, an ejector effect is generated at the opening of the combustion cylinder, and the amount of combustion gas passing therethrough is reduced. Will increase. That is,
The amount of primary air, which is combustion air, increases, the combustion completion time is short, and a combustion state with a short flame length is formed.
The durability can be improved by lowering the combustion cylinder temperature.

Furthermore, since the pressure loss is reduced by suppressing the air flow in the duct and the amount of air is increased, the temperature of the hot air during normal combustion can be reduced. The change width of the hot air temperature when the air volume decreases can be made large, and the operation of the overheat prevention device can be reliably performed. In particular, the above-mentioned phenomenon appears remarkably on the downstream duct surface in the extension of the raising and lowering of the combustion cylinder, and a more reliable operation can be performed by attaching an overheat prevention device to that portion.

Since the flow control plate is formed by cutting the right part of the combustion cylinder in a substantially vertical direction, there is no problem that the assemblability of the device main body is deteriorated and the performance is varied due to a change in the mounting angle. , Comfortable heating can be provided.

According to the second aspect of the present invention, since the cut-and-raised portion is provided near the opening of the combustion cylinder from which the combustion gas flows, a part of the airflow from the blower is cut and raised. When passing through the opening, the ejector effect of sucking the combustion gas can be remarkably exhibited, and by forming a stable combustion state with a short flame length, the temperature of the combustion cylinder can be reduced, and the combustion cylinder can be reduced. As a result, the pressure in the combustion cylinder is reduced and stable combustion can be obtained.

Further, according to the third aspect of the present invention, since the cut-and-raised portion is provided at the upper portion of the combustion tube, the airflow from the blower is controlled relatively upstream, so that the duct loss is reduced. Therefore, it is possible to secure a sufficient amount of air flow by suppressing the temperature rise on the upper surface of the main body and to use it safely for a long time. Further, even when the hot air outlet is closed, the combustion gas from the opening of the combustion cylinder and the airflow from the cut and raised opening are offset by each other, and the pressure applied to the inside of the combustion cylinder becomes difficult to increase, There is no need to worry about abnormal combustion such as an extremely long flame, and stable combustion can be obtained.

According to the fourth aspect of the present invention, a large amount of air supplied from the blower is cut and raised to pass through the opening, so that the ejector effect at the opening of the combustion cylinder is more remarkable. And stable combustion and reduction of the combustion cylinder temperature can be performed.

According to the warm air heater of the fifth aspect, the air flow in the duct is controlled to reduce the pressure loss, and the amount of air is increased to lower the temperature of the hot air during normal combustion. When the amount of blown air is reduced due to dust adhering to the inlet, the range of change of the hot air temperature is increased to ensure the operation of the overheat prevention device. In particular, the above-described phenomenon appears remarkably on the downstream duct surface in the extension of the raising and lowering of the combustion cylinder, and a more reliable operation can be performed by attaching an overheat prevention device to that portion.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a hot air heater in Embodiment 1 of the present invention.

FIG. 2 is a sectional view of a main part of a burner part of the hot air heater.

FIG. 3 is a perspective view of the hot air heater with a part of a duct cut away.

FIG. 4 is a perspective view of a hot air heater according to a second embodiment of the present invention, in which a part of a duct is cut away.

FIG. 5 is a perspective view of a hot air heater according to a third embodiment of the present invention, in which a part of a duct is cut away.

FIG. 6 is a cross-sectional view of a conventional hot air heater.

FIG. 7 is a perspective view of a conventional hot air heater with a part of a duct cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 Main body case 21 Tank 22 Cartridge tank 23 Pump 25 Vaporization part 28 Burner part 29 Combustion cylinder 29a Combustion cylinder opening 30 Blower 31 Duct 32 Cut and raised 32a Cut and raised opening 34 Overheat prevention device

Continued on the front page (72) Inventor Takehiko Shigeoka 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. A main body case, a blower provided on a back surface of the main body case, a tank for storing fuel in the main body case, a pump for sucking and discharging fuel from the tank, and vaporizing fuel supplied by the pump. Vaporizing section, a burner section that burns the vaporized gas from the vaporizing section, a combustion cylinder that covers the burner section and guides the combustion exhaust gas generated in the burner section upward, and a combustion exhaust gas that covers the combustion cylinder and is supplied from the blower. A box-shaped duct that forms a hot air path by mixing with an indoor air flow, wherein the combustion tube is provided with a cut-and-raised portion at an appropriate position to control the air flow from the blower. Machine. 2. The hot air heater according to claim 1, wherein a cut-and-raised portion is provided near an opening of the combustion cylinder. 3. The hot air heater according to claim 1, wherein a cut-and-raised portion is provided at an upper portion of the combustion tube. 4. The air blower according to claim 1, wherein a part of the air flow from the blower is branched into the combustion cylinder through the cut-and-raised opening generated by the cut-and-raised opening. Hot air heater. 5. The liquid fuel combustion device according to claim 1, wherein the overheat prevention device is provided on a duct surface downstream of the air blower from the blower.