JPS621656Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a combustion air blower in a widely used hot air heater called, for example, F.F type heating.

Conventionally, the combustion blower device in this type of hot air heater has been equipped with an independent supply fan (supply air blower) and an exhaust fan (exhaust blower) for supplying air for combustion and exhausting exhaust gas. With the two machines,
Air is supplied and exhausted, and the air supply fan motor is cooled by cold air passing through the air supply fan case from the air supply port.

However, since the exhaust fan motor in the above-mentioned air blower is installed independently, it is not cooled by cold air like the above-mentioned air supply fan motor, so it is cooled by heat exchange of the exhaust fan motor. As a result, the lubricating oil filled in the bearing may overheat and leak out, causing startup failure or vibration noise over time. Furthermore, the life of the exhaust fan motor may be shorter than that of the air supply fan motor due to wear of the bearings.

On the other hand, in order to improve combustion efficiency and energy-saving heating, this type of hot air heater is designed to control the appropriate amount of combustion air using an air supply damper installed on the passage of the air supply duct. However, if the air supply amount is reduced using the above air supply damper,
Since the amount of air used to cool the air supply fan motor is also reduced, there is a possibility that the air supply fan motor itself will overheat, which will shorten the life of the air supply fan motor in the same way as the exhaust fan motor mentioned above. This is also expected.

Therefore, the applicant first divided the air supply fan case and the exhaust fan case, each of which has a built-in fan motor in which the air supply fan and the exhaust fan are coaxially integrated into a partition plate in the casing body. established,
A bypass is installed that spans both fan cases,
An air supply duct having an air supply damper is connected to the air supply fan case, thereby supplying cold air from the bypass to reduce the exhaust gas temperature and prevent overheating of the exhaust pipe. proposed a system that not only improves safety but also prevents the fan motor from overheating and increases cooling efficiency.

However, in the above-mentioned hot air heater-based blower device by the present applicant, the air supply fan case that houses the fan motor has a complicated shape, so the airtightness is likely to be impaired by the exhaust gas. Processing becomes troublesome, making it difficult to save labor through mass production. In particular, hot air heaters that use F/F type heating must maintain airtightness by using sealing materials and packing materials for the supply air damper device, as it is necessary to prevent combustion gas from leaking indoors. Therefore, air supply fan cases and packing materials with complicated shapes have drawbacks such as complicating the installation of air supply damper devices and the like.

In order to eliminate the above-mentioned drawbacks, the present invention simplifies the shape of the air supply fan case provided within the casing body, thereby facilitating assembly and processing, and improving airtightness against exhaust gas. In addition, the present invention provides a hot air heater which aims to prevent overheating of a fan motor and increase cooling efficiency.

Hereinafter, an illustrated embodiment in which the present invention is applied to a briquette combustion apparatus will be described.

In Figures 1 to 4, number 1 indicates the base plate 1.
A box-shaped casing body that is integrated with a,
A hot air outlet 2 is provided at the upper front of the casing body 1, and an opening/closing door 4 having a vent 3 is provided at the front below the hot air outlet 2 so as to be openable and closable. In addition, the casing body 1
A hot air blower 5 is provided on the back plate 1b so as to blow warm air heat-exchanged by a combustion tube 21 and a heat exchanger 25, which will be described later, into the room from the hot air outlet 2 to heat the room. There is.

On the other hand, inside the casing body 1, there is a machine room 6.
The oven chamber 7 is divided by a mounting plate 8 (see FIG. 4) having ventilation holes 8a and 8b, and a third
As shown in the figure, a fan motor 9 is mounted by a bracket 30.

Further, on the outside of the fan motor 9, an air supply fan case 32, which is box-shaped and has an air supply port 31, is provided on the mounting plate 8 via a packing 33. fan case 32
As shown in FIG. 4, an air supply chamber 34 and an air supply damper (also simply referred to as a damper chamber) 35 are separated by a partition plate 36. Further, the air supply fan case 32 in which the damper chamber 35 is located is provided with a pair of cut and raised bearings 32a, and a support shaft 37a of the air supply damper 37 is attached to both cut and raised bearings 32a. It is mounted on a shaft so that it can be opened and closed so that the amount of air for combustion can be controlled.
Furthermore, the base 11a of the flexible air supply hose 11 is connected to the lower part of the air supply fan case 32 where the air supply damper 37 is located, and the other end opening of the air supply hose 11 is connected to the base 11a of the flexible air supply hose 11. It is connected to the burner case 12 of burner unit I.

On the other hand, an exhaust fan case 39 having an exhaust port 38 is attached to the mounting plate 8 at a position facing the air supply fan case 32 via an air supply auxiliary casing 32a. The fan cases 32 and 38 are provided with an air supply fan 40 and an exhaust fan 41 coaxially integrated with the fan motor 9. ing.
Further, an auxiliary case 43 forming a bypass 42 is provided on a part of the outer periphery of both the fan cases 32 and 38 so as to communicate with the air supply port 42a of the air supply auxiliary casing 32a.
The other end opening 42b of 2 communicates with the lower part of the exhaust fan case 39.

Therefore, when the intake air damper 37 closes to the position shown by the solid line in FIG. 42 to the exhaust port 38 of the exhaust fan case 39, so that the fan motor 9 is always cooled by the cold air flowing in from the air supply port 31. At the same time, the exhaust pipe connected to the exhaust port 38 can be cooled so as not to overheat.

On the other hand, as shown in FIGS. 1 and 2,
The other end of the air supply hose 11 passes through the mounting plate 8 and is connected to an air supply hole 12a of a burner case 12 that is removably inserted into the oven chamber 7. In the front,
A handle 12b is attached.

Note that a plurality of secondary air holes 12c are bored in the upper part of the burner case 12, and these are provided so as to form an insulating air layer for the air flowing in from the air supply hole 12a. That is, within the burner case 12, a burner inner frame 14 constituting a part of the burner unit I is detachably provided with a gap 13 forming a heat insulating air layer. 14 bottom 14
A plurality of charcoal briquettes 15 as solid fuel are placed in a row and a pedestal 14b is formed to be able to supply primary air from below. Further, a plurality of primary air supply holes 16 are bored below the base 14b, and these primary air supply holes 16 communicate with the air supply hole 12a.

On the other hand, a combustion tube 21 forming a combustion chamber 20 is fixedly installed in the upper part of the burner case 12, and the combustion tube 21 and the upper part of the burner case 12 are arranged so as to be in close contact with each other to prevent exhaust gas from flowing. It is designed to prevent leakage of information. Also, this combustion tube 2
1 includes a flame holding plate 23 having a plurality of ventilation holes 22.
A heat exchanger 25 having a built-in detour plate 25a for exhaust is connected to the upper part of the combustion tube 21, and the other end opening 25b of the heat exchanger 25 As mentioned above,
It is connected to one side opening of the exhaust fan case 39.

Further, on the front side of the combustion tube 21, a spark plug 26 made of an electrode rod is provided so as to extend to the ignition part of the briquette 15, and this spark plug 26 is provided on the side wall of the mounting plate 8. The ignition transformer 27 (see FIG. 1) is connected via a lead wire.

Therefore, when the spark plug 26 is energized now, it sparks and ignites the briquettes 15, and the fan motor 9 is driven to rotate both the air supply fan 40 and the exhaust fan 41, so that the air supply The combustion air flowing in from the port 31 cools the bearing part of the fan motor 9, and also flows from the ventilation hole 8a, the air supply damper 37 of the damper chamber 35, and the air supply hose 11 through the primary air hole 16. Briquette 1
The briquettes 15 flow into the bottom 14a of the burner inner frame 14, where the briquettes 15 are located, to start combustion, and then flow into the upper part of the briquettes 15 through the secondary air holes 12c, where combustion occurs. heat and exchange heat,
Thereafter, the air is exhausted to the outside through the exhaust port 38 by the exhaust fan 41.

On the other hand, the air in the oven chamber 7 where the heat exchanger 25 is located exchanges heat with the hot air blower 5 and is blown into the room from the hot air outlet to heat the room.

On the other hand, when the supply air damper 37 rotates in the direction of closing the door, the amount of air for combustion is limited, so that the excess airflow passes through the bypass 42 and reaches the exhaust port 3.
Since the bearing of the fan motor 9 is always air-cooled, and the exhaust pipe connected to the exhaust port 38 is cooled by the cold air from the bypass 42, no air is left in the exhaust gas. There is no risk of overheating due to residual heat.

In particular, the air supply fan case 32 of the present invention is formed into a box shape and is divided into an air supply chamber 34 and a damper chamber 35 by a partition plate 36. It has a simpler shape than a fan case, and this makes it easy to maintain airtightness through packing, prevent leakage of exhaust gas, and save labor through mass production.

Incidentally, although the present invention has been described with reference to an embodiment applied to a briquette combustion device, it may be designed to be used in a heater such as an kerosene stove or a gas stove, without changing the gist of the present invention. You are free to make changes.

As described above, according to the present invention, the air supply chamber 34 and the damper chamber 35 are connected to the partition plate 36 in the air supply fan case 32 having the air supply port 31 attached to the mounting plate 8 in the casing body 1. Therefore, an exhaust fan case 39 is formed separately and has an exhaust port 38 facing the exhaust fan case 39 via the air supply auxiliary fan case 32a.
2 and 39 are provided with an air supply fan 40 and an exhaust fan 41 coaxial with the fan motor 9, and an air supply damper 37 is pivotally mounted in the damper chamber 35 so as to be freely openable and closable. Since the air supply duct 11 is connected to the air supply fan case 32, each ventilation hole 8a, 8b is connected to the air supply chamber 34 and the damper chamber 35 in a part of the air supply auxiliary fan case 32a. On the other hand, since the air supply hole 42a of the air supply auxiliary fan case 32a is formed to communicate with the exhaust fan case 39 through the bypass 42 of the auxiliary case 42, the fan motor 9 and its bearing are Regardless of the opening/closing operation of the air supply damper 37, the air supply fan case is always effectively and appropriately cooled with a constant amount of air from the air supply port 31. 32 etc. can be simplified, not only the airtightness is improved and leakage of exhaust gas can be prevented, but also machining becomes easy and labor can be saved through mass production.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a warm air heater equipped with an air blower according to the present invention, and FIG. 2 is a chain line A--
FIG. 3 is an enlarged sectional view showing the main parts of the present invention, and FIG. 4 is an exploded perspective view showing a part of the main parts of the invention. 1...Casing body, 8...Mounting plate, 9...
Fan motor, 31...Air supply port, 32...Air supply fan case, 34...Air supply chamber, 35...Damper chamber, 3...Inner partition plate, 37...Air supply damper, 38
...Exhaust port, 39...Exhaust fan case, 40
...Air supply fan, 41...Exhaust fan, 42
……bypass.

Claims (1)

[Scope of utility model registration request] An air supply fan case 32 having an air supply port 31 attached to a mounting plate 8 in the casing body 1 has an air supply chamber 34 and a damper chamber 35 separated by a partition plate 36 and facing each other. In this manner, an exhaust fan case 39 having an exhaust port 38 is provided via the air supply auxiliary fan case 32a, and an air supply fan 40 coaxial with the fan motor 9 and an exhaust fan are installed in both fan cases 32 and 39. A fan 41 is provided, an air supply damper 37 is pivotally mounted in the damper chamber 35 so as to be freely openable and closable, and the air supply duct 11 is connected to the air supply fan case 32 in which the damper chamber 35 is located. Ventilation holes 8a and 8b are formed in a part of the fan case 32a so as to connect to the air supply chamber 34 and the damper chamber 35, and the air supply hole 42a of the air supply auxiliary fan case 32a is connected to the air supply hole 42a of the auxiliary case 43. 42 through the exhaust fan 4
1. A blower device for a warm air heater, characterized in that the blower device is formed so as to communicate with the air heater.