JPS5851558Y2 - Hot air machine - Google Patents

Description

[Detailed description of the invention] This invention heats air from a blower to warm air using a heating resistance element with a positive temperature coefficient of resistance, and discharges this warm air from a discharge hole to heat the room. It is related to wind machines.

As a conventional warm air fan of this kind, the Utility Model No. 5211075
As seen in Publication No. 2, that is, as shown in FIG. In addition, an auxiliary ventilation passage 16 is provided in the ventilation passage 13 and is located on the side of the blower 14 of the heating element 12 and has its suction port 15 opened, and the opening area of the auxiliary ventilation passage 16 is It has been proposed that the hood 17 can be adjusted arbitrarily by moving it.

However, in this conventional example, the opening area of the auxiliary ventilation passage 16 is adjusted by the user moving the hood 17, so the hood 17 must be moved every time the room temperature or the user's sensation changes. This requires the operation of moving the device, which is extremely troublesome for the user.

In view of the above-mentioned conventional problems, the present invention has developed a hot air fan that can automatically open and close a bypass path that is separate from the main air path that has a heating resistor element, depending on the temperature of the hot air. The purpose is to provide

The basic structure of the present invention to achieve the above object is a main air path with an intake hole at one end and a discharge hole at the other end, and a main air path located on the intake hole side of the main air path. a heat-generating resistor element that is located in the main air path on the leeward side of the blower and has a positive temperature coefficient of resistance that heats the air blown from the blower; A bypass path is provided in parallel with the resistance element portion and allows the air from the blower to bypass the heating resistance element to the leeward side of the heating resistance element without passing through the heating resistance element, and the bypass path is provided at a branch point between the leeward side of the heating resistance element and the bypass path. , a shutter is provided to open and close the bypass path, and this shutter automatically closes the bypass path when the hot air temperature is low and automatically closes the bypass path when the hot air temperature is high according to the resistance change of the heating resistor element. It was designed to open.

By having the above-mentioned structure of the present invention, the shutter provided for opening and closing the bypass path automatically closes the bypass path when the hot air temperature at the time of energization is low according to the resistance change of the heating resistor element. At first, the cold air is not emitted far away, thus eliminating discomfort to the user.

In addition, when the temperature of the hot air is high, the shutter automatically opens the bypass path, so the wind speed is no longer reduced by the heat generating resistor element, and the hot air can be discharged far away. It is possible to effectively heat every corner of the entire system, and since the shutter opens and closes the bypass path automatically, it is no longer as cumbersome to use as in the past.

Furthermore, since the heating resistor itself is used as a sensor to detect the hot air temperature, there is no need to install a separate sensor, and it can be provided at a low cost. Since it is a sensor, it is possible to accurately control the temperature of the hot air.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In Figures 1 to 3, 1 is a main air passage which has an intake hole 2 at one end and an outlet 3 at the other end. A blower 4 consisting of a fan is provided, and on the leeward side of the blower 4, a heating resistor element 5 made of ceramic whose main component is barium titanate and having a positive temperature coefficient of resistance as shown in FIG. 3 is installed. It's decorated.

Further, as shown in FIG. 2, the heating resistor element 5 is formed into a disk shape having a large number of ventilation through holes 6, and is disposed so as to block the main air passage 1. It is divided into a warm part 5b.

A bypass path 7 is provided in parallel with the heat generating resistor element 5 portion of the main air path 1 and bypasses the air from the blower 4 to the lee side of the heat generating resistor element 5 without passing through the heat generating resistor element 5.

Reference numeral 8 denotes a shutter provided at the branch point between the bypass path 7 and the downstream side of the heating resistor element 5, and the shutter 8 is configured to be automatically moved by a solenoid 9.

Reference numeral 10 denotes a spring, which serves to return the shutter 8 from the solid line A position to the dotted line B position and close the bypass path 7 when the solenoid 9 is not energized.

FIG. 4 shows an electric circuit in which the heating resistor element 5
The heat generating portion 5a and the temperature sensing portion 5b of the heating resistor element 5 are connected in parallel, and the solenoid 9 is connected in series to the temperature sensing portion 5b.
The motor of the blower 4 is connected in parallel to the electrical series circuit.

Next, to explain the operation, the shutter 8 is configured to be at position B when the current is first applied, and when the temperature of the hot air rises and the resistance value of the temperature sensing portion 5b of the heating resistor element 5 increases,
Since the shutter 8 is configured to be in the A position, when the power is first turned on, all the air generated by the blower 4 passes through the through hole 6 of the heating resistor element 5, and is heated and discharged as warm air. It is released into the room through hole 3.

As the temperature of the hot air rises, the resistance value of the heating resistor element 5 increases as shown in FIG. 3 and remains constant.

As the resistance value of the heating resistor element 5 increases, the amount of current applied to the solenoid 9 increases, so the solenoid 9 moves the shutter 8 from the B position to the A position against the force of the spring 10, thereby bypassing the Open road 7.

As a result, the air at room temperature passing through the bypass passage 7 is vigorously discharged from the discharge hole 3, so that the hot air can be discharged to a distant place that could not be reached heretofore.

As described above, according to the present invention, the shutter provided to open and close the bypass path automatically closes the bypass path when the hot air temperature at the time of energization is low according to the resistance change of the heating resistor element. Therefore, the cold air is not emitted far away at first, thereby eliminating discomfort to the user.

In addition, when the hot air temperature is high, the shutter is configured to automatically open the bypass path, so the wind speed is not reduced by the heating resistor element, and the hot air can be emitted far away. As a result, it is possible to effectively heat every corner of the entire room, and since the shutter opens and closes the bypass path automatically,
It is no longer as cumbersome to use as it used to be.

Furthermore, since the temperature-sensing part of the heating resistor element itself is used as a sensor to detect the temperature of the hot air, there is no need to install a separate sensor, and it can be provided at a low cost as well as heat the air blown from the blower. Since the heating resistor element itself is a sensor, it is possible to accurately control the temperature of the hot air.

[Brief Description of the Drawings] Fig. 1 is a longitudinal sectional view of a hot air fan showing an embodiment of the present invention, Fig. 2 is a perspective view of a heating resistor element in the hot air fan, and Fig. 3 is a temperature of the heating resistor element. FIG. 4 is a diagram showing the resistance characteristics, FIG. 4 is an electric circuit diagram thereof, and FIG. 5 is a longitudinal sectional view showing a conventional hot air fan. 1...Main air path, 2...Intake hole, 3...
...Discharge hole, 4...Blower, 5...
・Heating resistance element, 6...Through hole, 7...
・Bypass path, 8...Shutter, 9...
・Solenoid, 10... Spring.

Claims (1)

[Scope of utility model registration request] A main air path with an intake hole at one end and a discharge hole at the other end, a blower located on the side of the air intake hole in this main air path, and a blower located leeward from the blower in the main air path. A heating resistance element is provided on the side and has a positive temperature coefficient of resistance for heating the air blown from the blower, and a heating resistance element is provided in parallel with the heating resistance element portion of the main air path and heats the air blown from the blower. A bypass path is provided to bypass the heating resistance element to the leeward side without passing through the resistance element, and a shutter for opening and closing the bypass path is provided at a branch point between the leeward side of the heating resistance element and the bypass path, and this shutter is operated by a solenoid. The solenoid is configured to open and close, and the solenoid is electrically connected in series with the temperature sensing portion of the heat generating resistor element, and the bypass path is automatically closed when the hot air temperature is low according to the resistance change of the heat generating resistor element.
In addition, the hot air fan is configured to automatically open the bypass passage when the hot air temperature is high.