JPS6118360Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a hot air heater in which a combustor, a heat exchanger, a convection blower, and a hot air heater control device are built into the casing. The purpose is to prevent the control device from being damaged by heat.

An embodiment of this invention will be described below with reference to FIGS. 1 and 2. That is, in the figure, 1 indicates the front panel 1A, the rear panel 1B, the top panel 1C, and the first
Bottom panel 1D and left and right side panels 1E, 1F
A hot air outlet 2 is provided on the upper side of the front panel 1A with a predetermined length in the left and right width direction of the casing 1 (in the direction of the left and right side panels). The lower side of the casing 1B is connected to the first bottom panel 1D, and the heating air suction port 3A has a dimension that is approximately the same as the axial length of the cross-flow impeller 6A, which will be described later. It is provided to extend in the direction.
In this embodiment, the top panel 1C and the front panel 1A are integrally formed, and the rear panel 1B and the first bottom panel 1D are each integrally formed.
Reference numeral 4 is provided inside the casing 1 above and extends in the widthwise direction of the casing 1, and an exhaust pipe (not shown) is connected to one end, and a combustion cylinder 5A, which will be described later, is connected to the other end. This is an exchanger, through which combustion gas flows. Reference numeral 5 denotes a combustor consisting of a burner section 5B and a combustion tube 5A connected to the burner section 5B, and is provided below the heat exchanger 4 to extend in the horizontal width direction of the casing 1. The opposite side of the burner portion 5B of the heat exchanger 5A is connected to the heat exchanger 4. 6 is a convection blower provided below the combustor 5 and extending in the left-right width direction of the casing 1;
A cross-flow impeller 6A having an axial length that is approximately the same as the axial length of the combustion tube 5A and the burner portion 5B, a motor 6D that drives the cross-flow impeller 6A, and A rear guide wall 6B having substantially the same length as the rear guide wall 6B, a portion of which is fixed to a third air guide 13 (described later) and located on the outer periphery of the front panel 1A side of the transverse flow impeller 6A; A stabilizer 6C having approximately the same length as the axial length, a portion of which is fixed to the rear panel 1B, and forms the suction port 7 and discharge port 8 of the convection blower 6 together with the rear guide wall 6B.
It is composed of. 9 is heating air inlet 3
A second bottom panel is provided on the first bottom panel 1D, and a side portion of the front panel 1A is bent into a U shape in the left-right width direction of the casing 1. 10 is formed together with the second bottom panel 9 by curling the suction side end 6B' (second bottom panel side) of the rear guide wall 6B toward the front panel 1A side over the entire width. Discharge port, 1
Reference numerals 1 and 12 denote first and second air guides provided in the upper and laterally width directions of the casing 1, and 19 a room for accommodating a heat exchanger 4, a combustion tube 5A, etc., and a temperature chamber which will be described later. A fourth air guide partitions left and right into a room in which the wind heater control device 20 is housed, and has an opening that communicates with a cooling air passage 14, which will be described later. 20 is the fourth air guide 1
A hot air heater control device is housed in a room on the right side of the casing 1 formed by 9, and is mainly composed of a printed circuit board equipped with transistors, thyristors, etc. Note that this hot air heater control device 20
is composed of a control circuit for the combustor 5, a control circuit for the convection blower 6, and the like.

13 is provided to partition the front panel 1A and the combustor 5, and forms a cooling air passage 14 together with the front panel 1A, the left side panels 1E and 1F, the fourth air guide 19, and the rear panel 1B. An opening 13A is formed in the middle of the air guide. Note that this cooling air passage 14 communicates with the discharge port 10 formed by the second bottom panel 9 and the rear guide wall 6B, and a part of the cooling air passage 14 communicates with the discharge port 10 formed by the second bottom panel 9 and the rear guide wall 6B, and a part of the cooling air passage 14 communicates with the discharge port 10 formed by the second bottom panel 9 and the rear guide wall 6B. It communicates with a room in which the hot air heater control device 20 is housed. 15 is a humidifying tray provided in the third air guide 13 and located in the cooling air passage 14;
A humidifying plate 16 has one end immersed in the humidifying plate 15 and the other end positioned near the heat exchanger 4 through the opening 13A, and together with the humidifying plate 15 constitutes a humidifier. Further, 17 is a filter, and 18 is a leg.

The hot air heater according to this invention is configured as described above, and when combustion is performed in the burner section 5B, combustion gas is generated, and this combustion gas flows through the combustion tube 5A and the heat exchanger 4. . On the other hand, when the convection blower 6 is driven, heating air is sucked into the casing 1 through the air filter 17, flows around the combustion tube 5A and the heat exchanger 4, and is combusted in the combustion tube 5A and the heat exchanger 4. The hot air is exchanged with the heat of the gas and turned into warm air, which is blown into the room from the hot air outlet 2. Also, a part of the heating air sucked through the air filter 17 is sent to the cooling air formed by the front panel 1A, the left side panel 1E, the third air guide 13, and the fourth air guide 19 from the discharge port 10. A room in which air flows through the air passage 14, prevents the front panel 1A from being heated by the heat of the combustor 5, and houses the warm air heater control device 20 through an opening formed in the fourth air guide 19. The hot air heater controller 20
This prevents the fuel from being heated by the heat of the combustor 5 and being thermally damaged.

Also, at this time, when forming the discharge port 10 for flowing a part of the heating air into the cooling air passage 14, the suction side end of the rear guide wall 6B is curled into an R shape, so that noise is reduced from this part. Does not occur.

Then, the air that has cooled the front panel 1A and the hot air heater control device 20 is transferred to the third air guide 1.
3 to the outer periphery of the heat exchanger 4 through the opening 13A of the hot air heater 3, and to the back of the hot air heater through an opening (not shown) formed in a portion of the rear panel 1B corresponding to the storage room of the hot air heater control device 20. It can be done.

In this embodiment, the suction side end of the rear guide wall 6B was curled in an R shape over its entire width to form the discharge port 10, but a portion thereof may be curled in an R shape. In cases where the generation of noise from the discharge port 10 can be ignored, the suction side end of the rear guide wall 6B may be cut out without being curled into an R shape.

In the above embodiment, the front panel 1A is also cooled, but if there is no need to cool the front panel 1A, the cooling air passage may be configured to cool only the warm air heater control device 20. Just do it.

Although the convection blower 6 having a cross-flow impeller 6A is used as the convection blower, the intended purpose of this invention can also be achieved by using a convection blower having a Sirotsko impeller.

As described above, according to this invention, a cooling air passage is formed that communicates with the discharge port of the convection blower and the storage room of the hot air heater control device, and the heated air sucked by the convection blower is heated. Since a part of the previous heating air is configured to flow through the cooling air passage, it is possible to cool the hot air heater control device, and this control device can be heated by the heat of the combustor and be damaged by heat. can be prevented from occurring.

Also, according to this invention, in order to flow cooling air into the cooling air passage, a convection blower, which is essential for hot air heaters, is used instead of a dedicated blower, so the structure does not become complicated. , and does not increase costs.

[Brief explanation of the drawing]

FIGS. 1 and 2 are views showing an embodiment of this invention, with FIG. 1 being a longitudinal sectional view and FIG. 2 being a view showing the arrangement of the main components of the warm air heater. In addition, the same reference numerals in the drawings indicate the same parts, 1 is the casing, 2 is the hot air outlet, 3A, 3B are the heating air suction ports, 4 is the heat exchanger, 5 is the combustor, 5A is the combustion tube, and 5B is the burner. part, 6 is a convection blower, 6B
10 is a rear guide wall, 10 is a discharge port, 13 is a third air guide, 14 is a cooling air passage, 19
2 is a fourth air guide, and 20 is a hot air heater control device.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A combustor, a heat exchanger, a convection blower, and a hot air heater control device are installed in a casing having a hot air outlet and a heating air inlet, and the above-mentioned The combustion gas generated in the combustor is circulated in the heat exchanger, and the convection blower draws heating air from the heating air intake port,
In the hot air heater configured to cause the sucked heating air to flow around the outer periphery of the heat exchanger to be warmed, and to blow out the warmed heating air from the warm air outlet, at least the convection blower is used. A cooling air passage is formed which communicates with the discharge port of the air heater and the storage room of the warm air heater control device, and at the suction side end of the rear guide wall located on the outer periphery of the crossflow impeller in the convection blower. A hot air heater comprising a discharge port, and a part of the heating air sucked by the convection blower from the discharge port before being warmed is blown out and distributed to the cooling air passage. (2) The scope of the utility model registration claim, characterized in that the discharge port formed at the suction side end of the rear guide wall is formed by bending the suction side end of the rear guide wall into a curved shape. The hot air heater described in paragraph 1.