JP2001099490A - Hot air heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heater comprising a fan for blowing heat generated by a burner from a hot air outlet made in the front of a frame and having structure for sustaining a low temperature in the frame. SOLUTION: This hot air heater comprises a fan 3 fixed to the back of a frame 1, a hot air outlet 2 made in the front of the frame 1 and an air duct 4 coupling the fan 3 and the hot air outlet 2 wherein heat generated by a burner 5 in the frame 1 is blown into a room from the hot air outlet 2 through the air duct 4 and air outflow section is substantially eliminated from the shell of the frame 1. A control means 6 for blocking air flow passing through the air duct 4 is disposed in the air duct 4, an opening 7 communicating with the inside of the frame 1 is made in the air duct 4 in the vicinity of the fan 3, and pressure in the frame 1 is raised by means of the fan 3. The air duct 4 is not provided with a seal means for preventing leakage of air into the frame 1 between the air control means 6 and the hot air outlet 2 but provided with a gap 8 at a joint so that air in the frame 1 flows into the air duct 4 through the gap 8 thus sustaining a low temperature in the frame 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot air heater capable of lowering the temperature inside a frame in a heater provided with a ventilation path through which high-temperature hot air passes.

[0002]

2. Description of the Related Art A hot air heater has a structure in which a hot air outlet is provided in the front of a frame, and an air passage is formed in the frame so that wind of a blower provided in the back of the frame flows into the hot air outlet. High-temperature combustion gas discharged from the combustion chamber into the air duct,
A hot air heater is configured by exchanging heat between a burner, a combustion chamber, and a heat exchange section following the combustion chamber, and air flowing through the air passage, so that high-temperature air is blown out from a hot air outlet.

[0003] A burner as a heat source is disposed in the frame body, and the temperature of the frame body becomes high due to the hot air flowing through the burner and the air passage. The outer shell of the frame body has many air circulation holes. After that, low-temperature air in the room flows into the frame, and the air whose temperature has risen inside the frame is caused to flow out of the frame mainly by natural convection, and the frame maintains the low temperature by the indoor air. is there.

Further, the wind of the blower is directly or guided to the baffle plate and flows forward along the outside of the wall of the blower passage so as to be arranged at an interval from the wall of the blower passage and the blower passage. It has been practiced to lower the temperature of the guide plate to lower the temperature inside the frame.

[0005]

There are various electric parts and controllers which are vulnerable to high temperatures in the frame of the hot air heater. In the case of a burner using petroleum fuel as shown in the embodiment, a fuel tank or the like is provided. In some cases, troubles are likely to occur when the temperature inside the frame increases. Because of this,
The temperature inside the frame must be low, but opening many air holes in the outer shell of the frame as described above, unless air holes are made in places that are not desirable in design,
There are times when the inside of the frame cannot be maintained at a low temperature.

Further, in a configuration in which air is positively introduced into the outside of the air passage to prevent heat radiation from the air passage and keep the inside of the frame at a low temperature, no air outlet is provided around the hot air outlet. The high-temperature air that has cooled the air passage and the induction plate flows through the entire inside of the frame, and conversely the temperature inside the frame rises. Has greatly impaired the degree of freedom of the front design.

Further, when there is a minute air leak at a connection between walls forming a ventilation path through which hot air heat exchanged in a combustion chamber or the like or at a connection between the exit of the ventilation path and a hot air outlet, etc. Since hot air leaks into the frame body from this connection part, the inside of the frame body is likely to be heated to a high temperature.As a result, it is necessary to apply a sealing material to these connection parts or to seal them by interposing packing, It took a lot of man-hours to manufacture.

[0008]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems. A hot air outlet 2 is provided at the front of a frame 1 and a blower 3 is arranged at the back of the frame 1. A heater that provides an air passage 4 connecting the outlet 2 in the frame 1 and discharges the amount of heat from the burner 5 arranged in the frame 1 into the room from the warm air outlet 2 by an air flow flowing through the air passage 4. In the air passage 4, a passage air control means 6 for obstructing an air flow passing therethrough is arranged, and an opening communicating with the inside of the frame 1 is provided in the air passage 4 closer to the blower 3 than the passage air control means 6. 7 is provided, and the hot air outlet 2 is
There is a connection gap 8 without a sealing member between the wall of the ventilation path 4 on the side and the frame 1, and the outer shell of the frame 1 has a small air outflow portion to reduce the air flow from the connection gap 8 to the frame 1. The inflow of warm air into the inside is prevented by the blower 3, and air is allowed to flow out from the inside of the frame 1 toward the warm air outlet 2.

A heat shield plate 9 is arranged in the air passage 4 with a small gap between the wall surface and the heat shield plate 9, and a bent portion 9 a provided on the side of the blower 3 of the heat shield plate 9 constitutes the passage air control means 6. Since it functions as a member and suppresses a rise in the temperature of the wall of the air passage 4 in the air passage 4, the radiant heat from the wall of the air passage 4 is suppressed, and the inside of the frame 1 can be maintained at a low temperature.

Further, a burner 5 is arranged at a lower portion of the frame 1,
A combustion chamber 10 is connected to the burner 5, and the burner 5 and the combustion chamber 10 arranged in the air passage 4
Functions as a component of the air passage 4 in the frame 1.
A pressure guide 11 for guiding the wind pressure of the opening 7 near the blower 3 to the lower portion of the frame 1 is attached to the outside of the frame, and the air passing the air of the pressure guide 11 to the blower passage near the lower portion of the burner 5. A portion 11a is provided to guide the air entering the pressure guiding portion 11 from the opening 7 to the lower portion of the burner 5 from the air passage portion 11a and to flow out from the burner 5 and the vicinity of the combustion chamber 10 toward the hot air outlet 2. 5 and the surrounding temperature of the burner 5 could be reduced, and the temperature rise in the frame 1 by the burner 5 could be prevented.

[0011]

According to the present invention, the room air sent to the air passage 4 by the air blower 3 has the passage air control means 6 provided in the air passage 4, so that the pressure on the side of the air blower 3 becomes higher with the air flow control means 6 interposed therebetween. Since the opening 7 is provided in the wall of the air passage 4 near the blower 3, this pressure is applied to the inside of the frame 1. On the other hand, on the side of the warm air outlet 2, the connection portion of the members constituting the air passage 4 is not sealed, and the connection portion gap 8 is formed without sealing between the air passage 4 and the frame 1. Frame 1
The outer shell has a small air outlet, so the hot air outlet 2
The pressure in the frame 1 was higher than the pressure on the side, and it was possible to prevent the warm air from leaking into the frame 1.

The passage air control means 6 of the air passage 4 is constituted by a burner 5, a combustion chamber 10, a bent portion 9a at the end of a heat shield plate 9 mounted in the air passage 4, and the like. In the case of using the heat shield plate 9 installed in the air passage 4, the necessity of mounting the heat shield plate in the frame 1 outside the air passage 4 is reduced.

Further, in order to lower the temperature near the burner 5, which is likely to be high in temperature, there is provided a pressure guiding section 11 for guiding the air entering the frame 1 from the vicinity of the blower 3 to the vicinity of the burner 5.
The air that has entered the pressure guide section 11 enters the air passage 4 from near the burner 5 and flows toward the hot air outlet 2, so that the temperature inside the frame 1 due to the heat of the high-temperature burner 5 can be prevented.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure will be described with reference to the drawings showing an embodiment. 1 is a frame of a hot air heater, 2 is a hot air outlet provided in a part of the front surface of the frame 1, 3 is a back surface of the frame 1. The blower 4 attached to the blower 4 is a blower passage arranged between the warm air outlet 2 and the bell mouth of the blower 3 in the frame 1.

Reference numeral 5 denotes a burner disposed in the frame 1 and 10 denotes a combustion chamber connected to the burner 5, and at least the combustion chamber 10 is disposed in the air passage 4 and is an open type called a fan heater. In the oil heater, the upper part of the combustion chamber 10 has an air passage 4
The air blown by the blower 3 and the combustion exhaust gas are mixed in the blower passage 4 to generate warm air, and blown out from the warm air outlet 2 on the front surface of the frame 1 toward the room. .

The hot air heater of the embodiment shown in FIG. 1 is directed to an intake / exhaust type hot air heater which exhausts combustion exhaust gas to the outside and takes in the outdoor air as combustion air.
A heat exchange unit composed of a plurality of pipes erected from the top plate of the heat exchanger 13, an exhaust chamber 13 for collecting combustion exhaust gas at the upper part of the heat exchange unit 12, and an L-shaped exhaust chamber 14 below the exhaust chamber 13. The exhaust pipe extends to the end and projects from the back plate of the frame body 1. The exhaust pipe 14 is further extended and opened to the outside by a suction / exhaust top (not shown).

Reference numeral 15 denotes an air supply pipe communicating with the intake / exhaust top, 16 denotes a combustion fan for forcibly supplying air in the air supply pipe 15 to the burner 5, and 17 denotes a fuel pump for supplying fuel to the burner 5. The fuel sent to the burner 5 is ignited by an igniter (not shown), and is supplied with air from a combustion fan 16 to start burning in the burner 5 and the combustion chamber 10. Further, the generated combustion gas exchanges heat with the air sent from the blower 3 when passing through the heat exchange pipe 15, and the hot air is blown forward as warm air from a warm air outlet on the front surface of the frame 1. Things.

In a general hot air heater as described above, the inside of the frame is easily heated to a high temperature due to the amount of heat from the burner. In order to prevent this problem, the outer shell of the frame is provided with air inside the frame inside. Many air holes are opened so that air outside the frame can be easily exchanged, cold room air flows into the frame, and warmed air flows out of the frame by natural convection, The inside of the frame is maintained at a low temperature.

Further, in order to prevent heat from the burner and the air passage through which the hot air flows into the frame, a heat shield plate is provided, and hot air is blown from a connection portion of a wall plate constituting the air passage or a hot air outlet. A sealing material or packing is interposed so as not to flow directly into the frame.

According to the present invention, it is not necessary to open air holes in the outer shell of the frame 1 which is not preferable in terms of design, and even if there is a minute gap in the connection between the wall plates at the time of manufacturing the air duct 4, A hot-air heater capable of suppressing a rise in temperature inside 1 is proposed, and reference numeral 6 denotes a passing air control means provided in an air passage 4. The function of the passing air control means 6 is as follows.
Is operated, the wind pressure in the air passage 4 between the passing air control means 6 and the blower 3 increases, and conversely, the wind pressure between the passing air control means 6 and the hot air outlet 2 decreases.

Reference numeral 7 denotes an opening provided in the air passage 4 closer to the blower 3 than the passing air control means 6, and 8 denotes a hot air outlet 2 and the air passage 4
Is a connection gap provided without sealing the space between the frame 1 and the outer shell of the frame 1 without providing many air holes and the like, and the air outlet of the outer shell of the frame 1 is extremely reduced. I have.

When the air outlet is reduced in the outer shell of the frame 1 in this manner, when the blower 3 is operated, the wind pressure of the air passage 4 is applied to the inside of the frame 1 from the opening 7 and the pressure in the frame 1 is reduced. The pressure becomes higher than the pressure in the air passage 4 on the side of the hot air outlet 2 from the passing air control means 6. Therefore, even if there is a connection gap 8 between the air passage 4 and the hot air outlet 2, the air passage 4
Even if there is a connection gap 8 between the outer walls of the above, the air in the frame 1 flows into the air passage 4 from the connection gap 8, and the warm air in the air passage 4 1 has stopped flowing.

The above-mentioned passage air control means 6 may be constituted by a dedicated member, but may be a member attached to the air passage 4 for each purpose. 9a is a heat shield plate attached to the heat shield plate 9 through a gap.
The air sent into the air passage 4 by the blower 3 collides with the bent portion 9a and obstructs the flow of air, and the pressure of the air in the air passage 4 on the side of the blower 3 is high. It becomes. Further, the conventional heat shield plate is generally provided outside the air passage 4, but by having the function of the passing air control means 6, the heat shield plate can be installed in the air passage 4. By lowering the temperature of the wall, the temperature rise in the frame 1 could be suppressed.

A burner 5 similarly arranged in the frame 1
And a combustion chamber 10 connected to the burner 5 and a combustion chamber 10
Even when the heat exchange unit 12 and the like standing upright from the top plate are located in the air passage 4, this part can be made to function as the passing air control means 6, and such parts can be actively used. Thus, the cost of the passage control means 6 can be greatly reduced.

A pressure guiding portion 11 receives the wind pressure of the opening 7 opened in the air passage 4 and guides the wind pressure to a lower portion of the frame 1.
Reference numeral 11a denotes an air passage section located below the pressure guide section. The lower portion of the air passage 4 is arranged below the frame 1, and the burner 5 and the combustion chamber 10 are provided in the air passage 4 to control the passage air. When functioning as 6, by opening the air passage portion 11 a near the lower portion of the burner 5, the pressure of the pressure guide portion 11 can be directly discharged to the vicinity of the lower portion of the burner 5. Part of the indoor air flows from the lower part of the burner 5 toward the hot air outlet 2 through this flow path, so that the outer wall of the burner 5 is cooled and heat radiation is reduced, and the temperature inside the frame 1 does not rise. It is a thing.

[0026]

As described above, the inside of the frame 1 of the present invention is configured not to be at atmospheric pressure but to be higher than the pressure of the hot air outlet 2 as in the conventional hot air heater, Warm air did not enter the frame 1 from the air passage 4 on the outlet 2 side at all, and the temperature inside the frame 1 could be kept low.

Further, in the conventional hot air heater, an air outlet for inflow and outflow of air in the frame is required on each surface of the frame, and it is difficult to design the air outlet. Since the outer shell of the frame 1 does not have an air outlet in principle, the design intended by the designer can be easily realized.

The purpose of the structure of the present invention is to reduce the amount of heat entering the frame 1. Even if a heat shield plate is provided in the frame 1, it cannot be expected that the temperature can be effectively reduced. The present invention provides a heat shield plate 9 in the air passage 4 to realize both the function of the passing air control means 6 and the temperature reduction of the wall of the air passage 4, and the number of heat shield plates in the frame 1 is reduced. It can be reduced or eliminated, making effective use of the space of the frame 1
Can be designed to be small.

Further, the burner 5 which is likely to be high in the frame 1
An air passage 11a is provided near the lower part of the burner 5 in order to reduce the heat radiation from the burner 5, and when the air in the frame 1 is allowed to flow out of the vicinity of the burner 5 to the hot air outlet 2, the air passage 11
The air in the frame 1 supplied from a is preferably as low as possible. In the present invention, the air near the blower 3 is
Since the pressure guiding portion 11 for guiding to the lower part of the
The air with the lowest temperature among the air inside the burner 5
Since it flows to the lower part, the burner 5 can be cooled effectively.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a warm air heater showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a hot air heater showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Hot air outlet 3 Blower 4 Blower path 5 Burner 6 Passing air control means 7 Opening 8 Connection part gap 9 Heat shield plate 9a Bent part 10 Combustion chamber 11 Pressure guide part 11a Air passage part

Claims (3)

[Claims] 1. A hot air outlet 2 is provided on a front surface of a frame 1 and a blower 3 is disposed on a rear surface of the frame 1. A blow path 4 connecting the blower 3 and the hot air outlet 2 is provided in the frame 1. In addition to the above, a heater that discharges the amount of heat from the burner 5 disposed in the frame 1 into the room from the hot air outlet 2 by the airflow flowing through the airflow path 4 impedes the airflow passing through the airflow path 4. An opening 7 communicating with the inside of the frame 1 is provided in the air passage 4 closer to the blower 3 than the passing air control means 6, and the hot air outlet 2 is provided more than the passing air control means 6. There is a connection gap 8 without a sealing member between the wall of the ventilation path 4 on the side and the frame 1, and the outer shell of the frame 1 has a small air outflow portion to reduce the air flow from the connection gap 8 to the frame 1. A hot air heater characterized in that the inflow of warm air into the inside is prevented by the blower 3. 2. A heat shield plate 9 is disposed in the air passage 4 with a small gap between the wall surface and the heat shield plate 9. Function as a member,
The temperature rise of the wall of the ventilation path 4 is suppressed in the ventilation path 4.
Hot air heater as described. 3. A burner 5 is arranged at a lower portion of the frame 1, a combustion chamber 10 is connected to the burner 5, and the burner 5 and the combustion chamber 10 arranged in the air passage 4 are connected to a passing air control means 6. And a pressure guide portion 11 for guiding the wind pressure of the opening 7 near the blower 3 to the lower portion of the frame 1 outside the blower passage 4 in the frame 1, and near the lower portion of the burner 5. An air passage section 11a for letting the air of the pressure guide section 11 flow out toward the air passage 4 is provided, and the air that has entered the pressure guide section 11 from the opening 7 is guided from the air passage section 11a to the lower part of the burner 5, and the burner 5 The hot air heater according to claim 1, wherein the hot air is discharged from the vicinity of the combustion chamber (10) toward the hot air outlet (2).