JPS6233985Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an engine heating device, and particularly to an engine heating device using a planar heating element sheet in the heat generating portion.

In cars, boats, etc., when the engine gets cold in winter, the evaporation rate of fuel such as gasoline deteriorates, making it difficult to start the engine. Furthermore, if the engine is started immediately after starting, the engine will be under heavy load and damage will be accelerated. For this reason, engine heaters have traditionally been used in emergency situations such as fire engines, and in applications where engine performance is maximized, such as racing cars and boats. This engine heater is equipped with a heating element on one or several sides of a bag-shaped cover.
Warm the engine by placing it over the engine several hours or overnight before using it, so that the engine is in the best condition when it is used, so that it starts well and can be started immediately without the need for warming up. It is something to do.

By the way, conventional engine heaters use nichrome wire as the heating element, and are configured to adjust the temperature with a bimetallic thermostat. This thermostat has the disadvantage that it is difficult to decide where to install the sensor part, and it is extremely difficult to maintain a uniform temperature inside the engine heater, resulting in wide range of temperature changes and uneven heating. Ta. In addition, when used outdoors, the nichrome wire is easily damaged or disconnected, and the thermostat is prone to mechanical failure, leading to poor heat generation and temperature control, making maintenance difficult and reducing reliability. I had the inconvenience of missing it.

The present invention was developed in view of the drawbacks of the conventional technology, and the heat generating part is a planar heating element sheet having a self-temperature adjustment function, and power is supplied to the planar heating element sheet through two systems, This provides a highly reliable engine heating device that can maintain a constant temperature without using special accessories, has high safety and heating effects, and does not cause heat generation defects due to disconnection accidents. Its purpose is to.

In the present invention, a heat insulating member is provided on each surface of a housing-like cover, a planar heating element sheet having a large temperature coefficient change rate is provided inside at least one surface of the heat insulating member, and a heating element sheet is provided at two edges of the planar heating element sheet. The above object is achieved by connecting the electrode wires in a loop.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 12.

FIG. 1 is a perspective view showing an engine heater according to the present invention. In the figure, the engine heater 1 is
It has a housing-like cover 2 with an open bottom surface, and a ceiling part 3 of this housing-like cover 2 is attached to be openable and closable by a chuck part 4 provided along a circumferential edge 3 direction. Side part 20 of the housing-like cover 2 ~
As shown in FIG. 2, handles 5, 5 are sewn to the left and right side surfaces 21, 23 of the 23, and the engine (not shown) to be heated can be held by grasping the handles 5, 5. It is designed so that it can be easily covered. A power cord 6 and a storage pocket 7 for the power cord 6 are provided on the back surface 22 of the housing cover 2 (see FIG. 3). The housing cover 2
As shown in FIG. 4, on each side of the housing except for the ceiling part 3, there is a rectangular plate-shaped rigid heat insulating member 9 on the outside and a rectangular plate-shaped insulation member 9 on the inside of the disaster prevention cover sheet 8 formed in a bag shape as shown in FIG. A heater section 10 is inserted. The heater section 10 is composed of a planar heating element sheet 11 and a heat-resistant, waterproof, and insulative covering case 12 that tightly encloses the planar heating element 11.

As shown in FIG. 5, the planar heating element sheet 11 is made of a plastic material to which a conductive filler such as carbon black or graphite powder is added, and electrode wires 13 and 14 are integrated on both edges. For example, in products such as Sunnomy (trade name of planar heating element sheet manufactured by Ebisu Kako Co., Ltd.), the rate of change in temperature coefficient is extremely large, and as the temperature rises, the resistance increases significantly and the current decreases. It is equipped with a self-temperature adjustment function that prevents the temperature from rising (see Figures 8 and 9). When this planar heating element sheet 11 reaches a predetermined temperature after power is turned on,
Thereafter, the temperature is automatically controlled, so there is no need to install a thermostat, and running costs are significantly reduced because the current decreases as the temperature rises. The planar heating element sheet 11 has electrode wires 1
A rectangular cut is made between 3 and 14, so that good flatness can be obtained during extrusion molding. Furthermore, as shown in FIG. 6, even if a crack 15 occurs in the planar heating element sheet 11 for some reason, it will stop only within one strip section 16A and will not spread to the other strip section 16.
B and 16C are normally energized so that they can generate heat normally. The planar heating element sheet 11 configured in this manner is hermetically sealed within the covering case 12 having heat resistance, waterproofness, and insulation properties to form the heater section 10, as described above. The heater section 10 is disposed on the front, back, and left and right four side surfaces 20 to 23 of the housing cover 2. Then, the electrode wires 13, 13, . . . , 14, 14, . . . of the planar heating element sheets 11, 11, .
It is connected to the power cord 6. Therefore, each planar heating element sheet 11 is supplied with electricity from both the left and right sides, and even if a cutting accident occurs in the middle of the electrode wire 13 or 14, the planar heating element sheet 11 will continue to be energized. Therefore, the engine can be heated continuously, and a highly reliable engine heating device 1 can be obtained.

The ceiling portion 3 of the housing cover 2 has a rectangular plate-shaped rigid heat insulating member 9 inside the disaster prevention cover sheet 8.
is inserted to prevent heat from dissipating from the housing cover 2, and at the same time, it has a predetermined stiffness that is substantially the same as each of the side surfaces 20 to 23. Therefore, after opening the chuck part 4 as shown in FIG. 10, the side parts 20, 21,
23 laterally and further fold down the ceiling part 3 as shown in FIG. 12, the whole can be folded into a plate shape with desired strength, making it easy to carry and store. In addition, a handle 17 shown by a broken line in FIG. 12 may be provided on the outside of the ceiling part 3 on the center of gravity line when folded and accommodated. Furthermore, the heater section 10 may be provided only on one side, two or three of the four side surfaces, or may be provided on the ceiling section 3 as well. Further, a chuck portion may also be provided as necessary.

As described above, according to the present invention, a highly reliable engine heating device that can properly adjust the temperature without adding a thermostat, is safe, has low running costs, and does not cause abnormal heat generation or heat generation failure due to failure. is obtained.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the engine heating device according to the present invention, Figure 2 is a left side view of Figure 1, and Figure 3 is the
4 is a partially omitted vertical sectional view of the front part of the housing cover shown in FIG. 1, and FIG. Fig. 6 is a partial plan view showing an enlarged part of Fig. 5, Fig. 7 is a diagram showing the temperature-resistance characteristics of the planar heating element sheet shown in Fig. 4, and Fig. 8 is a diagram showing the planar heating element sheet shown in Fig. 4. A diagram showing the temperature output characteristics versus time after the seat is powered on,
FIG. 9 is a wiring diagram of the planar heating element sheet, and FIGS. 10 to 12 are explanatory diagrams sequentially showing how to fold the engine heater. 1... Engine heater, 2... Housing cover, 9
...Insulating member, 11... Planar heating element sheet.

Claims (1)

[Scope of utility model registration request] A heat insulating member is provided on each surface of the housing-like cover, a planar heating element sheet having a large temperature coefficient change rate is provided inside at least one surface of the heat insulating member, and electrodes are provided at two edges of the planar heating element sheet. An engine heating device characterized by having wires connected in loops.