JPH01151188A - Heating device - Google Patents

Abstract

PURPOSE:To attain a fixed temperature, prevent the ambient temperature of the heating device from becoming high, require no installation space, and obtain a safe auxiliary heating device by sticking a temperature self-control type face heater on the fan casing of a fan. CONSTITUTION:A temperature self-control type face heater 81 is stuck to the inner face of the fan casing 5 of a fan to constitute a heating device 80. When the voltage is applied across electrodes of the heater 81, it is heated and transfers heat to the air flowing through the air duct 82 in the fan casing 5. The fan casing 5 itself is in contact with the heater 81, thus heat is transferred to it, and it transfers heat to the air flowing through the air duct 82. Since the surface temperature of the heater 81 has the PTC characteristic, the temperature becomes nearly constant regardless of the air speed passing the surface, thus the ambient temperature of the heating device 80 is not made high. No installation space of the heating device is required, and a safe auxiliary heating device can be obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heating device using a self-temperature-controlled surface heating element whose temperature coefficient of resistance increases in a positive direction when a specific temperature range is reached. .

[Conventional technology]

FIG. 5 is a cross-sectional side view showing an air conditioner incorporating a conventional sheathed heater or an auxiliary electric heating device in which a plurality of electric heater wires are installed upright, as disclosed in, for example, Japanese Utility Model Publication No. 12507/1983. , FIG. 6 is a front view of FIG. 5 with the front panel removed.

(1) is a filter, (2) is a blower, which is composed of a motor (3), a fan (4), and a fan casing (5). (6) is a heat exchanger, and (7) is a cooling heat exchanger. A drain pan for treating the drain generated by (6), (8
) is an electric heating device for auxiliary heat source with a sheathed heater or multiple electric heater wires installed upright, and (9) is a side plate σO at the air outlet.
An air passage is formed by the front panel a and the back plate opening.

FIG. 7 shows a sheathed heater, and FIG. 8 shows a heater in which a plurality of electric heater wires are arranged upright.

A conventional air conditioner incorporating an electric heater for an auxiliary heat source is configured as described above, and air is passed through a blower (2) from a filter (1) to a heat exchanger (6) to an electric heater for an auxiliary heat source. It passes through the device (3) and further through the outlet (9). (Indicated by arrows in Figure 5.) At this time, the circulating air is cooled or warmed by the heat exchanger (6), but during heating operation, the indoor or outdoor air temperature is low and the air is warmed by the heat exchanger (6). When the temperature of the air is low, heating can be performed by operating the auxiliary heat source electric heating device (8).

[Problem that the invention seeks to solve]

An air conditioner incorporating a conventional sheath heater or an auxiliary electric heating device (8) in which a plurality of electric heating wires are installed is configured as described above, so that the air outlet (9) is made of plastic. In the case of parts with low heat resistance such as molded products, the surface temperature of the auxiliary electric heating device (3) will rise due to a failure of the blower (2) or a decrease in air volume due to dust adhering to the filter (17), resulting in a high temperature in the surrounding area. Air outlet with low heat-resistant temperature (9
) etc. may become deformed or, in the worst case, cause ignition or smoke, and there is a problem in that a space is required to incorporate the electric heating device (8).

This invention was made to solve the above-mentioned problems, and even if the air blower fails or the air volume decreases due to dust on the filter, the area around the auxiliary electric heating device will not become high temperature. Another object of the present invention is to obtain a heating device that does not require space for incorporating an auxiliary electric heating device.

[Means for solving problems]

A heating device according to the present invention has a self-temperature-controlled surface heating element attached to a fan casing of an air blower.

[Effect]

In the heating device according to the present invention, the surface temperature of the self-temperature-controlled surface heating element remains almost constant regardless of the amount of air passing through it, so the surroundings of the heating device do not become high temperature, and the fan casing of the blower Since it is pasted, there is no need for cutting space as a heating device.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a heating device showing one embodiment of the present invention. 6
Reference numeral 11 denotes a self-temperature-controlled surface heating element, which is attached to the inner surface of the fan casing (5) of the blower (2) to constitute a heating device. FIG. 2 is a detailed view of the self-temperature-controlled surface heating element 6υ, where (13a, ) and (13b) are positive and negative electrodes embedded inside the self-temperature-controlled surface heating element @υ. Further, the surface of the self-temperature-controlled surface heating element is insulated by an electrically insulating coating, and the fan casing (5) is made of an electrically insulating material with good thermal conductivity. FIG. 3 is a longitudinal sectional view of an air conditioner incorporating the heating device (1) of the present invention, and (1) to (7) and (9) are completely the same as the conventional air conditioner shown in FIG.

In the heating device configured as described above, when a voltage is applied between the electrodes (13a) and (13b), the self-temperature-controlled surface heating element (b) generates heat. , heat is transferred to the air flowing through the ventilation passage in the fan casing (5). Since the fan casing (5) itself is also in contact with the self-temperature-controlled surface heating element 611, heat is transferred to the air flowing through the ventilation path. Since the surface temperature of the self-temperature-controlled surface heating element f311 has PTC characteristics, it remains almost constant at a certain fixed temperature regardless of the wind speed of the air passing through the surface, so the ambient temperature of the heating device Does not reach high temperatures.

The operation of the air conditioner except for the heating device is exactly the same as the conventional example.

In addition, the electrode (13a) of the self-temperature-controlled surface heating element βυ.

(13b) may be provided with two sets or a plurality of free sets of electrodes, as shown in FIG.

In addition, a self-temperature-controlled surface heating element field is installed in a fan casing (
A similar effect can be obtained by pasting it on the outer surface of 5).

〔Effect of the invention〕

As described above, according to the present invention, since the self-temperature-controlled surface heating element is attached to the fan casing of the blower as a heating device, the surface temperature of the self-temperature-controlled surface heating element depends on the surrounding environment such as the wind speed. Since the temperature is almost constant without being affected by the heating device, the surroundings of the heating device do not become high temperature, and the installation of the heating device requires no space, resulting in a safe auxiliary heating device.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a heating device showing an embodiment of the present invention;
FIG. 2 is a detailed view of a self-temperature-controlled surface heating element, and FIG. 3 is a longitudinal sectional view of an air conditioner incorporating the heating device of the present invention.
FIG. 4 is a detailed view showing another embodiment of the self-temperature-controlled surface heating element. Figure 5 is a vertical cross-sectional view of an air conditioner incorporating a conventional auxiliary electric heating device, Figure 6 is a front view with the front panel of Figure 5 removed, and Figure 7 is a conventional auxiliary electric heating device. FIG. 8 is a configuration diagram of a sheathed heater, which is one of the devices, and is a configuration diagram of the same conventional heater in which a plurality of electric heater wires are arranged upright. In the figure, (5) is the fan casing, the hoko is the heating device, and (6) is the self-temperature-controlled surface heating element. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (2)

[Claims] (1) In a heating device using a self-temperature-controlled surface heating element that has the characteristic that the temperature coefficient of resistance increases in the positive direction when a specific temperature range is reached, the self-temperature-controlled surface heating element is attached to the fan casing of the blower. A heating device with attached. (2) The heating device according to claim 1, characterized in that a self-temperature-controlled surface heating element is attached to the inner surface of the fan casing.