JPH0319466B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an oil hot air heater that emits hot air through a hot air outlet at the front of a wind tunnel and a propeller fan provided at the back. and related to improvements to the fixing structure of the propeller fan.

[Conventional technology]

A conventional oil hot air heater will be explained with reference to FIGS. 3 and 4. In the figure, reference numeral 1 denotes an outer shell case, which is composed of a front plate 1a, a side surface 1b, and a rear plate 1c, and this outer shell case 1 is fixed on a base plate 2. Reference numeral 3 denotes a burner unit installed upright on the base plate 2 inside the outer shell case 1, and its flame port 3a protrudes from the lower surface side into the wind tunnel 4 provided inside the outer shell case 1, and the flame The mouth 3a is surrounded by a combustion tube 5 provided within the wind tunnel 4.

The wind tunnel 4 has a structure in which a hot air outlet 6 formed on the front plate 1a of the outer shell case 1 communicates with an outside air inlet 7 formed on the back plate 1c, and warm air is guided to the hot air outlet 6. It is equipped with a guide canopy 8.

In addition, 9 is an outside air intake port 7 on the back side of the wind tunnel 4.
This blower is constructed of an electric motor 9a and a propeller fan 9b directly connected to the electric motor 9a, and the blower 9 is attached to a casing 10 fixed to the back plate 1c of the outer case 1. Reference numeral 11 indicates a hot air outlet grill provided in front of the hot air outlet 6, and reference numeral 12 indicates an oil tray disposed on the base plate 2 inside the outer shell case 1. This oil tray 3 controls the oil supply level from the oil tank 13. It is for keeping the oil constant, and the oil receiving tray 12
and the burner section 3 are connected by an oil supply pipe 14. 15 is a partition plate that divides the inside of the outer shell case 1 into a combustion part side and an oil tank side, 16 is a buttful plate attached to the front side of the top opening of the combustion tube 5, and 17 is a combustion tube by attaching the buttfull plate 16. This is an opening formed on the back side of the top part of 5.

In the oil hot air heater configured as described above, the fuel sent from the oil tank 13 to the burner section 3 through the oil pan 12 and the oil supply pipe 14 is burned at a high temperature in the burner section 3, and becomes a combustion air stream from the combustion tube 5. Rise.
And the combustion airflow is the propeller fan 9 of the blower 9.
The hot air is mixed with the air pumped by b at the upper part of the wind tunnel 4, and is blown into the room from the hot air outlet 6.

[Problem that the invention seeks to solve]

Incidentally, in the conventional oil hot air heater as described above, the wind tunnel 4 and the blower are supported by attaching them to the back plate 1c of the outer shell case by screwing them individually. For this reason, the number of man-hours for assembling and attaching the above-mentioned structure increases, resulting in a problem of increased costs.

[Purpose of the invention]

This invention was made to resolve the above-mentioned conventional problems, and aims to provide an oil hot air heater that can reduce the number of man-hours for installing and assembling a wind tunnel and blower, and also reduce costs.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a wind tunnel arranged in the outer shell case so as to communicate between the hot air outlet and the outside air intake port, and a wind tunnel arranged in the outer shell case such that the flame outlet projects into the wind tunnel. In the oil hot air heater, the oil hot air heater has a burner section installed in the wind tunnel, a combustion tube arranged in the wind tunnel so as to surround the burner port of the burner section, and a blower arranged in the outside air suction port section. The peripheral flange of the wind tunnel is brought into contact with the inner periphery of the outside air inlet opening in the back plate of the outer shell case, and the flange is engaged with a temporary fixing claw cut and raised inside the back plate. A wind tunnel is temporarily supported, and a peripheral flange of a casing holding the blower is brought into contact with the outer peripheral edge of the outside air suction port of the back plate, facing the peripheral flange of the wind tunnel, and the outside air suction port of the back plate is mounted. The present invention is characterized in that the circumferential flanges of the wind tunnel and the blower casing, which overlap with each other with their circumferential edges sandwiched in between, are tightened and fixed from the outside via the same tightening screw.

[Effect]

In this invention, the wind tunnel is temporarily fixed to the back plate using a temporary fixing mechanism, and then the casing of the blower that is abutted from the outside of the back plate is attached with the same screw, so that the wind tunnel and the To simplify the installation of the blower.

〔Example〕

Embodiments of the oil hot air heater according to the present invention will be described below with reference to FIGS. 1 and 2. The main structure of the entire oil hot air heater in this embodiment is the same as that shown in FIGS. 3 and 4, and therefore the characteristic parts of this invention will be described with emphasis.

1 and 2 show details of the wind tunnel and blower mounting mechanism, which is a characteristic part of the present invention. shaped notch 19
A pair of temporary fixing pawls 20 are formed by cutting and raising inward on the back plate 1c of the outer shell case 1, facing each of the notches 19, and each pawl 20 is provided with the above-mentioned notches. 19, the wind tunnel 4 can be temporarily fixed to the back plate 1c. Further, the upper side 18a and the lower side 18b of the flange 18
A pilot hole 21 for screwing in the mounting screw is formed in the back plate 1c facing the pilot hole 21.
2 is drilled. Reference numeral 23 denotes a flange provided on the casing 10 that holds the blower 9, and the flange 23 is overlapped with the insertion hole 22 of the back plate 1c. These are mounting screws for fixing to the back plate 1c.

In the oil hot air heater configured as described above, when assembling the wind tunnel 4 and the blower 9 to the outer shell case 1, first insert the notch 19 of the wind tunnel 4 into the back plate 1.
It engages with the claw 20 of c. As a result, the wind tunnel 4 is connected to the claw 2.
0, the flange 18 is in close contact with the inner surface of the back plate 1c, and the prepared hole 21 and the insertion hole 22 are aligned. After that, the casing 10 equipped with the blower 9
The flange 23 of is overlapped with the insertion hole 22 of the back plate 1c from the outside, and the mounting hole (not shown) formed in this flange 23 and the insertion hole 2 of the back plate 1c are overlapped from the outside.
By inserting screws 24 into the holes 21 and tightening them, the back plate 1c, the flange 18 of the wind tunnel 4, and the flange 23 of the casing 10 are integrated. As a result, the wind tunnel 4 and the blower 9 are attached to the back plate 1c.

That is, the wind tunnel 4 and the blower 9 use the same mounting screw 2.
4 can be fixed at the same time, thereby reducing the number of installation steps and the number of installation screws.

〔Effect of the invention〕

As described above, in the present invention, the wind tunnel is temporarily closed by locking the peripheral flange of the wind tunnel to the claw portion cut and raised on the inner peripheral edge of the outside air inlet opening in the back plate of the outer shell case. Along with stopping
The peripheral flange of the blower casing is brought into contact with the peripheral flange of the wind tunnel from the outside across the peripheral edge of the outside air inlet, and these overlapping parts are tightened with the same tightening screw to connect the wind tunnel and the blower. Since the casing and the blower can be fixed simultaneously to the back plate of the outer shell case, a common screw is required compared to the conventional structure in which the wind tunnel and the blower are supported separately on the outer shell case. The use of the present invention simplifies the mounting structure, facilitates assembly, and reduces the number of man-hours required for installation, and has the effect of significantly improving the support structure of wind tunnels and blowers.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the wind tunnel and blower mounting mechanism in the oil hot air heater of the present invention, Fig. 2 is a perspective view showing details of the wind tunnel temporary fixing mechanism of the present invention, and Fig. 3 is a conventional oil hot air heater. FIG. 4 is a partially cutaway front view of the wind heater, and FIG. 4 is a vertical side view of FIG. 3. 1... Outer shell case, 2... Base plate, 3... Burner section, 4... Wind tunnel, 5... Combustion tube, 6... Warm air outlet, 7... Outside air suction port, 9... Blower, 10 ……
Casing, 12... Oil pan, 13... Oil tank, 18... Flange, 19... Notch, 20...
... Temporary fixing claw, 21 ... Pilot hole, 22 ... Insertion hole, 2
3...Flange, 24...Mounting screw. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A wind tunnel arranged in the outer shell case so that the hot air outlet and the outside air intake port communicate with each other, a burner part installed in the outer shell case so that the flame outlet projects into the wind tunnel, and the wind tunnel. In the oil hot air heater, which has a combustion tube arranged so as to surround the flame opening of the burner section, and a blower arranged at the outside air suction port, the outside air is opened at the back plate of the outer shell case. A peripheral flange of the wind tunnel is brought into contact with the inner peripheral edge of the suction port, and the flange is engaged with a temporary fixing claw portion cut and raised inside the back plate to temporarily support the wind tunnel, and the back plate A peripheral flange of a casing holding the blower faces and abuts against a peripheral flange of the wind tunnel, and the wind tunnel and the blower casing overlap with the outside air inlet periphery of the back plate sandwiched therebetween. An oil hot air heater characterized in that each peripheral flange of the flange is fastened and fixed from the outside via the same tightening screw.