JPS6028323Y2 - Heat retention devices such as rice cookers - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat-retaining device such as a rice cooker that keeps the temperature of rice constant by controlling the heat generated by a heat-retaining heater using a temperature-sensitive switch.

Conventionally, for example, in a rice cooker, a heat-retaining heater was provided separately from the rice-cooking heater, and this heat-retaining heater was attached to the inner frame that accommodated the rice container, and a temperature-sensitive switch was also attached for exclusive use. It is attached to the inner frame separately from the above-mentioned heat-retaining heater via a plate, etc., and the temperature-sensitive switch senses the temperature of the inner frame and, by extension, the rice in the rice container, while controlling the heat generation of the heat-retaining heater. This is done to keep the temperature of the rice constant.

However, in the conventional system where the heat generation of the insulation heater is controlled by a temperature-sensitive switch attached to the inner frame separately from the insulation heater, the temperature-sensitive switch is not directly related to the degree of heat generation of the insulation heater. Due to variations in the mounting of the dedicated mounting plate to the inner frame and the mounting of the temperature-sensitive switch to this mounting plate, etc., the degree of proximity of the temperature-sensitive switch to the inner frame is also inconsistent, and the temperature-retaining heater is different for each product. There was a problem that the heat generation temperature of the rice was different, and therefore the temperature at which the rice was kept warm was higher or lower than the standard value.

Additionally, in order to attach the temperature-sensitive switch to the rice container, there is a drawback that in addition to the above-mentioned mounting plate, many parts such as screws and nuts are required for mounting. This method requires a lot of time and effort, such as installing a temperature-sensitive switch, and has the drawback of poor workability.

This invention was made in view of the above-mentioned circumstances,
Therefore, the purpose of this is to create a rice cooker that can maintain the temperature of rice within the standard range for all products without causing variations in the heat generation temperature of the heat retention heater, and that can also reduce the number of parts and improve work efficiency. To provide thermal insulation equipment.

An embodiment in which the present invention is applied to a rice cooker will be described below with reference to the drawings. First, in Fig. 1, 1 is an outer frame, 2 is
3 is an inner frame, and 3 is a pot which is a rice container that is removably inserted into the inner frame 2. A heater 4 for cooking rice is arranged in the lower part of the inner frame 2 below the pot 3.

On the other hand, 5 is an inner lid, 6 is an outer lid, and 7 is a handle.

Reference numeral 8 denotes a heat-retaining heater attached to the outer periphery of the upper part of the inner frame 2. Specifically, as shown in FIGS. It is sandwiched between two heat transfer bodies 11 and 11 made of a heat conductive material such as 11 and 11, and is wound around the upper outer periphery of the inner frame 2, and has an annular shape as a whole.

Incidentally, reference numeral 12 denotes mounting arms provided at both ends of the heat transfer body 11, 11, respectively, and the heat retaining heater 8 is fixed by tightening the mounting arms 12, 12 with screws 13.

Reference numeral 14 denotes a temperature-sensitive switch, for example, using a thermal reed switch (trade name), which is installed on the heat transfer body 11, and specifically connected directly in series with the heating element 10 of the heat-retaining heater 8, especially one end of this. It is connected and sandwiched between the two heating elements 11, 11 together with the heating element 10, in short, it is incorporated into the heating element 11.11 (see FIG. 4).

Incidentally, reference numeral 15 denotes a hole formed in the heat transfer body 11.11 on the side directly behind the inner frame 2 so as to allow the temperature sensitive switch 14 to face the inner frame 3.

Further, 16 in FIG. 2 is a lead wire 17 connected to one end of the heating element 10 via the temperature-sensitive switch 14, and a lead wire 17 connected to the other end of the heating element 10, which generates heat. The body 10 and the temperature-sensitive switch 14 are incorporated into an electric circuit (not shown) of the entire rice cooker.

Therefore, in this embodiment configured as described above, the temperature-sensitive switch 14 is incorporated into the heat transfer body 11 in which the heat-generating element 10 of the heat-retaining heater 8 exists. It is attached to the inner frame 2 to maintain the closest relationship with the rice cooker 8, without causing variations like in the conventional case.In addition, the inner frame 2, as well as the temperature of the rice in the pot 3, can be controlled not only by the temperature of the rice but also by the heat insulating heater. The temperature of the heat retainer 8 can also be directly sensed, so the heat generation of the heat retainer 8 can be controlled more reliably, and the temperature of the rice can also be maintained at a constant value that meets the specifications for all products. be.

Furthermore, the conventional mounting plate and its mounting parts can be completely omitted, and the labor involved in installing them can also be eliminated, which improves work efficiency and contributes to lower prices. It is possible.

In particular, in the case of this embodiment, the hole 15 provided in the heat transfer body 11 as described above allows the temperature sensing switch 14 to detect the food temperature even better.

However, the present invention is not limited to the embodiments described above and shown in the drawings, and may be modified without departing from the scope of the invention, such as the presence or absence of the hole 15 described above, or application to a heat-retaining jar other than a rice cooker. Various changes are possible.

As explained above, the present invention has a heat insulating heater that is attached to an inner frame that accommodates a rice container and is made up of an electric heating element and a heat transfer element that transfers the heat of the heating element to the rice container, and the heating element generates heat. In a heat-retaining device such as a rice cooker, which has a temperature-sensitive switch for controlling the This method has excellent effects such as being able to maintain the temperature of rice at a constant standard value for all products without causing any variation in temperature, and also being able to reduce the number of parts and improve workability.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a cutaway side view of the rice cooker, Fig. 2 is a perspective view of the main parts, and Fig. 3 is a sectional view taken along the line ■-■ of Fig. 2. , FIG. 4 is a sectional view taken along the line IV-IV. In the figure, 2 is an inner frame, 3 is a pot (rice container), 8 is a heat-retaining heater,
10 is an electric heating element, 11 is a heat transfer body, 14 is a temperature-sensitive switch, and 15 is a hole.

Claims (1)

[Claims for Utility Model Registration] 1. A heat insulating heater that is attached to an inner frame that accommodates a rice container and includes an electric heating element and a heat transfer element that transmits the heat of the heating element to the rice container, and 1. A heat-retaining device for a rice cooker or the like, characterized in that the temperature-sensitive switch is incorporated into the heat transfer body. 2. The heat retaining device for a rice cooker according to claim 1, wherein the heat transfer body has a hole that allows the temperature-sensitive switch to face the inner frame.