JPH0555779B2 - - Google Patents

Description

[Detailed description of the invention] 【Technical field】

TECHNICAL FIELD The present invention relates to a hot air fan installed near the floor surface, such as at the bottom of a closet, and used for indoor heating.

[Background technology]

Conventional floor-mounted or wall-mounted hot air fans are
The width of the air outlet was narrow and the circulation effect was small, making it difficult to equalize the indoor temperature.

[Purpose of the invention]

The present invention was made in view of the above-mentioned technical background, and its purpose is to make it possible to widen the width of the air outlet without increasing the size of the hot air fan, and to The purpose is to provide a thin hot air fan with a low height.

[Disclosure of the invention]

Therefore, the hot air fan according to the present invention is a hot air fan that has two multi-blade centrifugal fans whose rotational axis direction is the air suction port and a heat generating means built into the main body housing. The two blowers, whose mouths are oriented in opposite directions, are arranged with their wind outlet facing in the same direction and in a direction perpendicular to the rotation axis and the wind blowing direction, and the heat generating means is connected to the wind of both blowers. It is characterized by being placed in front of the air outlet, and 2.
By arranging the wind outlet of the multi-blade centrifugal blower in the direction perpendicular to the rotational axis direction and the wind blowing direction, the width of the wind outlet can be widened and at the same time
It is thinner than when using a large stand blower. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. As shown in FIG. 1, a slit-shaped hot air outlet 6 is opened at the front of a metal main body housing 5 (shown with the top cover removed in FIG. 1a). A power switch 9 and a strength switch 10 are provided next to the hot air outlet 6, and an intake port 7 is opened on both sides, and a filter 8 is placed on the intake port 7. The filter 8 is made of a mesh-like net. Further, a heat exchanger 2 as a heat generating means 40 is built in the front part of the main body housing 5, and a blower 1 is built in behind the heat exchanger 2. The heat exchanger 2 has a large number of heat radiating fins 12 formed on the outer periphery of a hot water pipe 11 that circulates hot water. is led out to the back of the main body housing 5, and an on-off valve 3 and a cold air prevention thermostat 13 are attached to the hot water inlet side A of the hot water pipe 11, and a heat source device (not shown) is attached to the hot water inlet side A.
is connected. The on-off valve 3 opens and closes the flow path in the hot water pipe 11, and can be controlled to open and close by electrical means, such as a solenoid valve. The cold air prevention thermometer 13 prevents the blower 1 from circulating until the temperature of the heat exchanger 2 is raised by circulating hot water at startup.
This is an element for stopping the rotation of the motor 14. The blower 1 generates wind by rotating a Shirotsuko fan 15 using a motor 14, and is built into a fan casing 16 and a fan cover 17, which are approximately in the shape of a "6". A wind inlet 41 is opened at the front, and a wind outlet 3 is formed at the front end.
9 gradually widens in a substantially wrap-like shape so as to widen on the side of the balloon. Inside the main body housing 5, two blowers 1 are placed upside down with respect to each other, that is, as shown in FIG. The blower 1 is arranged with the mouth 41 facing down, and the blower 1 with the air suction port 41 facing upward is located at the lower part of the main body housing 5, with the wind suction port 41 facing down, as shown in FIG. As shown in FIG. 5, the blower 1 is located at the upper part of the main body housing 5, and both blowers 1 are arranged at different levels, and a gap 18 is formed between the air suction ports 41 of both the blowers 1 and the inner surface of the main body housing 5. has been done. Furthermore, both blowers 1
The wind outlets 39 are arranged side by side on the left and right, and both wind outlets 39 are combined to spread on the outlet side, so that the direction of the wind blown out from the wind outlets 39 spreads to the left and right. A heat exchanger 2 is disposed in front of the air outlet 39 in a vertically inclined manner as shown in FIG. When the on-off valve 3 is opened, warm water is circulated within the heat exchanger 2, and when the motor 14 rotates the Shirotsko fan 15, external air enters the main body housing 5 from the intake port 7 and fills the gap 18. The air is introduced into the air blower 1 through the air suction port 41, and the right air blower 1 blows air to the right (when facing the wind blowing direction), the left air blower 1 blows air to the left,
Both winds are combined and the wind is blown out so that it spreads from side to side. The blown air is blown to the heat exchanger 2, where it is heated and turned into warm air, which is blown into the room from the hot air outlet 6. Therefore, the thickness of hot air fan A is equal to the thickness of fan 1 and gap 1.
It only takes 8 minutes, and it can be made thinner while still ensuring airflow. Moreover, since the heat exchanger 2 is inclined, the heat exchange efficiency can be increased without increasing the blowing pressure loss. That is, the length of the hot water pipe 11 within the heat exchanger 2 can be increased without significantly increasing the passage distance of the air within the heat exchanger 2, thereby increasing the effect of the counterflow. The electrical circuit of hot air fan A is shown in FIG. 6, and the temperature can be controlled manually. That is, when the power switch 9 is turned on, the on-off valve 3 opens and hot water circulates through the heat exchanger 2. When the temperature of the heat exchanger 2 rises, the cold air prevention thermometer 13 closes and one motor 14 rotates to circulate hot water. At this time, if the intensity switch 10 is turned on (strong), the other blower 1 will also rotate at the same time and operate at high speed, but if the intensity switch 10 is turned off (weak), the other blower will 1 is stopped and operated in low mode, and the temperature can be controlled manually by operating the strong/weak switch 10. FIG. 7 shows an example of the use of the hot air fan A, in which the warm air fan A is housed in a space 20 at the bottom of a closet 19. Since the hot air fan A of the present invention is thin, it can be built-in as described above, and it does not look strange and does not get in the way. What is shown in FIG. 8 is a circuit of an electric system in another example of the present invention, and the hot air blowing out of the hot air fan A at a temperature corresponding to the room temperature is controlled by this electric circuit. That is, each terminal of the temperature control circuit 29 is connected to an AC power source 30 (commercial power source), a power switch 9, a fuse 31, a cold air prevention thermometer 13, a temperature sensor 4 (thermistor), a temperature setting volume 32 of the strength switch 10, an on-off valve 3, and The motor 14 of the blower 1 is connected as shown. The temperature control circuit 29 includes a constant voltage DC power supply circuit 33 consisting of a double-wave rectifier circuit 34 and a smoothing circuit 35 for rectifying the AC power supply 30 into a DC current of a predetermined voltage.
, a relay 38 that turns on and off the motor 14 of one blower 1, a transistor 36 that is connected to the emitter side and opens the relay 38 by the emitter current, and a reference voltage and room temperature on the temperature setting volume 32 side. A comparator 37 that compares the comparison voltage on the side of the temperature sensor 4 that detects the temperature and outputs a base current to the base of the transistor 36.
It is composed of. When the power switch 9 is turned on, the on-off valve 3 is opened and hot water is supplied to the heat exchanger 2. When hot water begins to circulate through the heat exchanger 2, the cold air prevention thermometer 13 is heated and turned on, and since the relay 38 is closed at this time, the motors 14 of both blowers 1 are started and the blower 1 starts operating. do. The air sucked from the intake port 7 is sucked into the blower 1 and sent to the heat exchanger 2, where it is heated by exchanging heat with hot water, and the heated hot air is released from the hot air outlet 6. Made to squirt. On the other hand, the temperature sensor 4 is installed near the intake port 7 inside the hot air fan A, and constantly detects the room temperature. When the warm air is blown into the room and the temperature in the room rises, the temperature sensor 4 detects the rise in the room temperature and operates the relay 38 of the temperature control circuit 29.
The rotation of one blower 1 is stopped. That is, when the temperature of the temperature sensor 4 increases, the comparison voltage decreases due to a decrease in its resistance value, and a forward base current is output from the comparator 37 to the transistor 36, and the emitter current flows through the transistor 36, which causes the relay 38 to be activated. It is to develop. When only one blower 1 is operated, the amount of air blown decreases, so the amount of heat supplied into the room by warm air gradually decreases, and the room temperature also decreases. When the room temperature drops,
When the temperature sensor 4 detects this (the comparison voltage on the temperature sensor 4 side becomes higher than the reference voltage, cutting off the emitter current and closing the relay 38), the stopped operation of the blower 1 is restarted, and the amount of hot air is increased. Increase room temperature. In this way, one of the blowers 1 is repeatedly operated and stopped, and the room temperature is adjusted to a substantially constant temperature with small fluctuations. What is shown in FIG. 9 is still another example of the present invention,
A pair of normally closed contacts of the relay 38 are connected to the motor 14 side of both blowers 1, and one of the pair of normally open contacts is connected to one of the blowers 1 via a resistor R, and the other is connected to the motor 14 side of both blowers 1. It was liberating. When the room temperature is low, the relay 38 is normally closed and both blowers 1 are operated, and when the room temperature is high, the relay 38 is switched to the normally open side and only one blower 1 is operated at low speed. I'm set to drive at low speed.

【Effect of the invention】

As described above, in the present invention, the wind outlets of the two multi-blade centrifugal blowers are arranged in the direction perpendicular to the rotational axis direction and the wind blowing direction. Compared to the case of using one large multi-blade centrifugal blower with air blowing performance, the thickness and depth in the direction of the rotating shaft are both smaller, and the width of the air outlet can be expanded, allowing the air to spread from side to side. can be easily obtained, especially since the air inlets of the two multi-blade centrifugal blowers are oriented in opposite directions.
Although the shape of the fan casing of a multi-blade centrifugal blower is not suitable for arranging the air outlets side by side, the air outlets of both blowers can be lined up in one piece, and in this way. Since it is possible to configure a wide wind outlet and at the same time to achieve a thin design, it can be suitably used as a built-in type to be installed in the lower part of a closet, etc., and because it has a wide wind outlet It has a high circulation effect indoors and can evenly heat the room. Also,
Since it has two blowers, it is possible to easily switch between strong and weak operations by changing the number of blowers in operation.

[Brief explanation of the drawing]

Figures 1 a, b, c, d, and e are a partially broken plan view, front view, rear view, and partially broken right side view and left side view showing one embodiment of the present invention, and Figure 2 is 1st
An enlarged view of Figure d, Figure 3 is a side sectional view showing the arrangement of the same blower as above, Figure 4 is a XX sectional view of Figure 3, Figure 5 is a YY sectional view of Figure 3, Figure 6 is a circuit diagram showing a circuit for operating the same blower as above;
Figures 7a, b, and c are front views, plan views, and cross-sectional views showing the installation state of the same hot air fan, Figure 8 is a circuit diagram showing a temperature control circuit in another example of the present invention, and Figure 9 is a diagram of the present invention. It is a circuit diagram showing a temperature control circuit in still another example of the invention, 1 is a blower,
15 is Shirotsuko fan, 39 is wind outlet, 4
0 is a heat generating means, and 41 is an air suction port.

Claims (1)

[Scope of Claims] 1. A hot air blower that includes two multi-blade centrifugal blowers whose air suction ports are oriented in the direction of the rotational axis and a heat generating means in a main body housing, the air suction ports being opposite to each other. Both blowers are oriented in the same direction, and are arranged in a direction perpendicular to the rotation axis and the wind blowing direction, and the heat generating means is located in front of the wind blowers of both blowers. A hot air fan characterized by being installed in. 2 The heat generating means is a heat exchanger that supplies heat by circulating hot water, and the two blowers are installed at positions offset from each other in the direction of their rotational axis, with the air intake ports and the main body facing opposite to each other. 2. The hot air fan according to claim 1, wherein a gap is formed between the inner surface of the housing and the inner surface of the housing. 3. The warm air fan according to claim 1, wherein both the blowers are capable of operating independently of each other.