JPS6233986Y2 - - 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. Also, if you start operating the engine immediately after starting it, the load on the engine will be large 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 you use it, so that it starts well and can be started immediately without the need for warming up. It is meant to be.

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 troublesome and lacking in reliability. There was this inconvenience. Additionally, glass wool is used to insulate the nichrome wire.
The entire heating device lacked rigidity, making it inconvenient to carry and store.

The present invention was developed in view of the shortcomings of the conventional technology, and the heat generating part is made of a planar heat generating sheet with a self-temperature adjustment function, and the whole is foldable, thereby making it possible to attach special accessories. It is possible to maintain a constant temperature without using it, and it is safe and
The purpose is to provide an engine heater that has a high heating effect, reduces heat generation defects due to disconnection accidents, etc., is easy to carry, and does not take up much space for storage.

The present invention provides a heat insulating member on each side of the housing cover, a planar heating element sheet with a large temperature coefficient change rate inside at least one side of the heat insulating member, and one end edge of the top plate portion of the housing cover. The above-mentioned object is achieved by providing a chuck portion except for the chuck portion and forming the entire casing-like cover so that it can be folded freely.

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 so as to be openable and closable by a chuck part 4 provided along the circumferential edge 3 direction. Side part 20 of 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 parts 23 to 23, as shown in FIG. ) can be easily covered. A power cord 6 and a storage pocket 7 for the power cord 6 are provided on the back side 22 of the housing cover 2.
(See Figure 3). On each side of the housing cover 2 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 rigid heat insulating member 9 on the inside inside the disaster prevention cover sheet 8 formed in a bag shape as shown in FIG. Similarly, a rectangular plate-shaped heater section 10 is inserted. This heater section 10 includes a planar heating element sheet 11
and a heat resistant sheet containing this sheet heating element 11 in a hermetically sealed manner.
The cover case 12 is waterproof and insulating.

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 the 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 2 and 13 so that good flatness can be obtained during extrusion molding. Further, as shown in FIG. 6, even if a crack 15 occurs in the planar heating element sheet 11 for some reason, it will stop in only one strip portion 16A and will not spread to the other strip portion 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 and back of the housing cover 2, and on the left and right four side surfaces 20-23. 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.

As described above, according to the present invention, the temperature can be adjusted well without the need for a thermostat, it is safe and has low running costs, and is highly reliable as it does not cause abnormal heat generation or heat generation failure due to malfunction.
An engine heating device that is easy to carry and store 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 cross-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, 3
...Ceiling part, 4...Chuck part, 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 cover, and a planar heating element sheet having a large rate of change in temperature coefficient is provided inside at least one side of the heat insulating member. 1. An engine heating device characterized in that the entire housing-like cover is formed so as to be foldable.