JPS643017B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermostat mounting device, for example, for accurately transmitting the temperature inside a roasting chamber such as a toaster oven to a thermostat, and controlling the temperature inside the roasting chamber more accurately. The purpose is to provide a mounting structure for.

As shown in FIG. 1, a conventional thermostat mounting device includes a substantially box-shaped inner casing 2' forming a roasting chamber containing a heater such as a toaster oven, and a heat receiving part 1a' at one end. and a substantially L-shaped temperature-sensitive metal fitting 1' having good thermal conductivity and having a mounting part 1b' for a thermostat 3' at the other end, and controlling the energization to the heater according to the temperature inside the roasting chamber. and a thermostat 3', the heat receiving part 1 of the temperature sensitive metal fitting 1'
a' into the roasting chamber, and fix this heat receiving part 1a' to the side wall of the inner casing 2' from the inside of the roasting chamber with screws 4'. A thermostat 3' was fixed to the mounting portion 16' by screws.

However, in such a conventional configuration, only one side of the heat-receiving part 1a' of the temperature-sensitive metal fitting 1' is in contact with the air in the roasting chamber, so that sufficient heat is not conducted to the thermostat 3'. Since the back surface of the heat receiving part 1a' is in contact with the inner casing 2', the heat that should be conducted to the thermostat 3' is diffused into the inner casing 2', which prevents quick and accurate heat transfer. Therefore, the temperature within the inner casing cannot be accurately controlled. Regarding the tightening of the temperature-sensitive metal fitting 1' to the inner casing 2', conventionally it is attached to the inner casing 2' from the inside of the roasting chamber with a single screw 4'; If the screws are tightened from outside the chamber, the tips of the screws will be exposed inside the roasting chamber, which is dangerous, and the temperature-sensitive metal fitting 1' is often made of aluminum, which has good thermal conductivity.
In this case, due to the material, it is not possible to attach the screws sufficiently even if the screws are cut, so it is necessary to use nuts, etc. However, if this method is used, the appearance will be spoiled and the workability of the installation will not be very good. Ta.

The present invention eliminates the drawbacks of the conventional thermostat mounting device described above, and one embodiment of the present invention will be described below with reference to the accompanying drawings.

In Figures 2 to 4, 1 is an inner casing that houses a heater and forms a roasting chamber space, and 2 is a thermos that detects the temperature inside the inner casing 1 and controls energization to the heater. Tatsu, 3 is a mounting bracket made of, for example, a stainless steel plate, a surface-treated steel plate, etc., and is approximately L-shaped.
A fixing portion 5 having a screw hole 4 for tightening with a screw is provided on the side wall of the thermostat, a mounting surface 6 for tightening the thermostat 2 is provided at the other end, and a cut-and-raised portion 7 is provided in the middle for regulating the position. Reference numeral 8 denotes a temperature-sensitive metal fitting made of aluminum or the like having good thermal conductivity and having a substantially L-shape.
A heat receiving part 10 is inserted into the thermostat 2 and has a claw 9 for regulating the position, and the other end is provided with a heat transfer surface 1 that conducts heat in the inner casing 1 to the thermostat 2.
1, and has an engaging surface 12 that engages with the cut and raised portion 7. In addition, the thermostat 2, the heat transfer surface 11 of the temperature-sensitive metal fitting 8, and the mounting metal fitting 3
The mounting surface 6 of the thermostat unit 13 is provided with holes 2', 11', and 6', respectively, and these three parts are tightened with screws 17 and nuts 18, and the thermostat unit 13
It consists of Further, in the side wall of the inner casing 1, there is a hole 14 for inserting the heat receiving part 10 of the thermostat unit 13 into the roasting chamber and regulating its position.
A hole 15 into which the claw 9 of the temperature-sensitive metal fitting 8 is fitted to prevent the thermostat unit 13 from swinging, and a tightening hole 16 are formed.

When the thermostat unit 13 is installed on the side wall of the inner housing 1, the heat receiving part 10 of the temperature sensing metal fitting 8
As shown in FIG. 3, the mounting bracket is inserted into the hole 14 in the side wall of the inner casing 1 from the outside of the roasting chamber, and then rotated clockwise, as shown in FIG. The fixing portion 5 of No. 3 is brought into contact with the side wall of the inner casing 1, and is fixed by tightening from the outside of the roasting chamber with screws 19. At this time, the temperature-sensitive metal fitting 8 is in a thermally non-contact state with the side wall of the inner casing 1. Also,
The contact between the temperature sensing metal fitting 8 and the mounting metal fitting 3 is also only the contact between the mounting surface 6 and the heat transfer surface 11. Furthermore, the tip of the screw 19 that fixes the thermostat unit 13 to the side wall of the inner casing 1 is covered with the heat receiving portion 10 of the temperature sensing metal fitting 8.

In the above configuration, the operation will be explained next. First, when the air in the roasting chamber is heated by the heater, the heated air is absorbed into the heat receiving part 1 of the temperature-sensitive metal fitting 8.
Both the front and back sides of 0 touch and are heated efficiently. Next, a temperature-sensitive metal fitting 8 made of a material with good thermal conductivity
Heat is conducted to the thermostat 2 through the thermostat 2. At this time, the temperature-sensitive metal fitting 8 has no thermal contact with the side wall of the inner case 1, and the contact with the mounting fitting 6 is only with the mounting surface 6, so that heat is not transferred to the side wall of the inner case 1. There is no diffusion and the heat is quickly conducted to thermostat 2.
This thermostat 2 allows for quick and accurate control of energization to the heater.

As is clear from the description of the above embodiments, according to the present invention, the heat receiving part of the temperature-sensitive metal fitting is inserted into the inner casing from the outside of the roasting chamber without making thermal contact with the side wall of the inner casing. As a result, there is a large contact area with the convection current inside the roasting chamber formed inside the inner casing, and there is no heat diffusion of the roasting chamber temperature to the side wall of the inner casing. Since the contact between the mounting surface of the mounting fitting and the heat transfer surface of the temperature-sensitive fitting is kept to a minimum, the temperature of the roasting chamber can be accurately and quickly transmitted to the thermostat. In addition, the mounting bracket constituting the thermostat unit can be fixed to the side wall of the inner casing with screws in the same direction as the direction of insertion of the thermostat unit, that is, it can be tightened and fixed on the outside of the roasting chamber, so the workability is good. Moreover, since the tip of this screw is covered with the heat receiving part of the temperature-sensitive metal fitting, the tip of the screw is not exposed inside the roasting chamber, and as a result, the appearance quality is not impaired. .

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a conventional thermostat mounting device, Fig. 2 is an exploded perspective view of a thermostat mounting device showing an embodiment of the present invention, and Fig. 3 is a cross-section of the same essential parts during the assembly process. 4 are sectional views of the same essential parts in the same assembled state. 1...Inner case, 2...Thermostat, 3...
Mounting bracket, 5... Fixed part, 6... Mounting surface, 8...
Temperature-sensitive metal fitting, 10...Heat receiving part, 11...Heat transfer surface, 1
3...Thermostat unit, 19...screw.

Claims (1)

[Claims] 1. An inner casing that houses a heater and forms a roasting chamber, a thermostat that detects the temperature inside this inner casing and controls energization to the heater, and a side wall of the inner casing at one end that A heat-receiving part inserted into the inner casing from the outside of the roasting chamber in a non-contact state, and a temperature-sensitive metal fitting with good thermal conductivity, which has a heat transfer surface to the thermostat at the other end, and a temperature-sensitive metal fitting at one end. a fixing part covered by the heat receiving part of the temperature-sensitive metal fitting and fixed to the inner wall of the inner casing with screws from the outside of the roasting chamber;
a mounting bracket having a mounting surface for the thermostat on the other end, the thermostat is brought into thermal contact with the heat transfer surface of the temperature-sensitive metal fitting, and the thermostat is provided with a mounting surface of the temperature-sensitive metal fitting on the mounting surface of the mounting metal fitting. The temperature-sensitive metal fitting and the mounting metal fitting are fixed via a heat transfer surface, and further, the temperature-sensitive metal fitting and the mounting metal fitting are
A thermostat mounting device characterized in that the mounting surface and the heat transfer surface are in a non-thermal contact state except for the contact portion.