JPH078995Y2 - Hot air heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a warm air heater in which the blowing direction of warm air from a hot air outlet can be changed by a movable louver driven by a motor.

(Prior Art) Conventionally, a warm air heater defines an air blowing path for guiding air from a blower incorporated therein to a hot air outlet on an outer surface of the air conditioning body, and providing a heating source in the air blowing path. To get warm air,
Further, there is also known one in which a movable louver for changing the wind direction driven by a motor is provided in the downstream portion of the air passage to change the blowing direction of the warm air from the hot air outlet, and in this case, the driving of the movable louver. The motor is generally housed in a motor chamber inside the body that is partitioned from the air passage.

(Problems to be solved by the invention) Although the drive motor of the movable louver is not directly exposed to hot air in the above-mentioned one, the temperature of the motor chamber rises due to the heat transfer from the hot air, which causes heating of the motor. There was a problem that durability was reduced.

It is an object of the present invention to provide a warm air heater having a simple structure in which a part of the air from the blower can be used for cooling the drive motor of the movable louver and the heating of the motor is prevented.

(Means for Solving the Problem) In order to achieve the above object, in the present invention, an air blow passage for guiding air from a blower built in the body to a warm air outlet on the outer surface of the body is defined in the body. A heating source and a movable louver for changing the blowing direction of the warm air from the hot air outlet, and the drive motor for the movable louver is a motor in the body partitioned by the air passage. In what is stored in the room,
A first vent hole which is opened in a part of the air passage upstream of a part of the air passage for heating the air by the heating source, in the inner wall of the side wall of the container having an inner-outer double wall structure, and A second ventilation hole opening to the motor chamber is formed, and the both ventilation holes are communicated with each other through a ventilation gap formed between the inner wall and the outer wall of the side wall.

(Operation) Before a part of the air blown from the blower to the blower passage is heated by the heating source, the motor chamber is passed through the ventilation gap between the first and second ventilation walls and the inner and outer double walls and the second ventilation hole. Is prevented from being heated by the drive motor of the movable louver that is supplied to the housing. Further, the side wall of the body is also actively cooled by the air flowing in the ventilation gap, and the side wall is prevented from being heated.

(Embodiment) Referring to the drawings, reference numeral 1 denotes a body of a warm air heater, in which a suction port 2 is formed in a lower rear portion of the body 1 and a warm air outlet 3 is formed in an upper front portion thereof. Left and right sides 1 through which the air from the suction port 2 is sucked through the filter 5 into the lower space defined by the partition plate 4 inside
A pair of air blowers 6, 6 are arranged in parallel, and a vertical air passage 7 is formed in a space above the partition plate 4 in the body 1 to guide air from the air blowers 6, 6 to the hot air outlet 3. The heating source 8 and the humidifier 9 are arranged above the heating source 8 in the air passage 7.

Both the blowers 6 and 6 have a common motor arranged in the middle thereof.
6a, and the heating source 8 is composed of a lower burner case 8a, an intermediate combustion chamber 8b, and an upper heat exchanger 8c composed of a plurality of heat exchange pipes. Combustion air is supplied to the burner case 8a from the air supply pipe 10 to the back of the body 1 by the combustion fan 11, and the heat exchanger 8c is supplied from the combustion chamber 8b.
The air flowing in the air blowing passage 7 is heated by the combustion hot air guided to the air, and the hot air is exhausted from the exhaust pipe 12 on the back surface of the body 1. Reference numeral 13 in the figure denotes a control box for housing the control valve 13a for the heating source 8 and various electric components 13b.

The warm air outlet 3 is provided with a plurality of horizontally long upper and lower louvers 3a, and the outlet 3 which is a downstream portion of the air passage 7 is further provided.
A plurality of vertically long left and right movable louvers 14 capable of swinging in the horizontal direction are provided on the back surface of the above, and the blowing direction of warm air can be changed to the left and right by the movable louvers 14. The movable louver 14
Is reciprocally oscillated laterally by a drive motor 14a through a known link mechanism 14b. The upper end of a heat shield plate 15 provided between the front surface of the body 1 and the heating source 8 is movable louver. A motor chamber 16 is formed below the movable louver 14 so as to be partitioned from the blower passage 7 by extending obliquely rearward and upward toward the rear side of the lower end of 14 and the motor chamber 16 is driven by the drive chamber. motor
Stored 14a.

Each of the left and right side walls 17 of the body 1 has a double wall structure including an inner wall 17a and an outer wall 17b. The inner wall 17a has a relatively high wind pressure in the upstream portion of the air heating portion of the air passage 7. First vent hole 18 that opens to the side of the operating burner case 8a
And a second vent hole 19 opening to the motor chamber 16 are formed, and both vent holes 18 and 19 are communicated with each other through a vent gap 17c between the inner wall 17a and the outer wall 17b, and Part of the air is introduced from the first ventilation hole 18 into the motor chamber 16 through the ventilation gap 17c and the second ventilation hole 19 so that the heating of the motor 14a can be prevented.

Here, when the motor 14a is provided so as to be biased to one side in the lateral direction as in the present embodiment, it is mainly the air from the ventilation gap 17c of the side wall 17 on one side that contributes to the cooling of the motor 14a. The air flowing in the ventilation gap 17c of the side wall 17 on the other side mainly contributes to prevention of heating of the side wall 17.

As shown in FIG. 1, the outer wall 17b is provided with a service lid 20 for supplying water to the humidifier 9 so that air is not blown out from the ventilation gap 17c when the lid 20 is opened. ,
Install the service lid 20 on the inner surface of the outer wall 17b with a ventilation gap 17c.
A packing 21 for partitioning is installed.

(Effect of the Invention) As apparent from the above description, according to the present invention,
Part of the air blown from the blower can be supplied to the motor chamber that houses the drive motor for the variable louver through the ventilation gap formed between the inner and outer double walls of the side wall. To improve its durability,
Moreover, since a separate duct for guiding the cool air to the motor chamber is not required, the structure is simplified, and at the same time, the heating of the side wall can be prevented.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an example of the heating device of the present invention, FIG. 2 is a front view of the heater with its front plate removed, and FIG. 3 is a cutaway side view thereof. 1 …… Body 3 …… Warm air outlet 6 …… Blower 7 …… Blower 8 …… Heating source 14 …… Movable louver 14a …… Drive motor 16 …… Motor chamber 17 …… Sidewall 17a …… Inner wall 17b… … Outer wall 17c …… Ventilation gap 18 …… First vent hole 19 …… Second vent hole

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. An air duct is defined in the body for guiding air from a blower built into the body to a hot air outlet on the outer surface of the body, and a heating source and the hot air outlet are provided in the air passage. And a movable louver for changing the blowing direction of the warm air, and a drive motor for the movable louver is housed in a motor chamber in the body partitioned by the air passage. In the inner wall of the side wall of the container body, a first vent hole opening in a part of the air passage upstream of a part of the air passage for heating the air by the heating source and a second air hole opening in the motor chamber. A warm air heater, wherein a ventilation hole is formed so that both ventilation holes communicate with each other through a ventilation gap formed between the inner wall and the outer wall of the side wall.