JPH0232183Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a coffee extractor used to extract coffee, tea, etc.

[Conventional technology]

For example, as shown in FIG. 5, the coffee brewer has a heating plate 3 built into a brewer main body 2 equipped with a water storage tank 1. This heating plate 3 has a water boiling pipe 4
A heater 5 using a sheathed heater or the like is provided. A water supply pipe 7 communicating with the water storage tank 1 is connected to the water boiling pipe 4, and the water sent from the water storage tank 1 is boiled by the heat of the heater 5, and the water supply pipe 9 is connected to the water boiling pipe 4.
The hot water is made to flow from the hot water supply port 10 to the filter cup 11 through the hot water supply port 10. Filter cup 11
A bottle 12 is placed below.

The bottle 12 is placed on a heat insulating plate 15, and the coffee liquid collected in the bottle 12 is kept warm. This heat insulating plate 15 is provided on top of the heating plate 3 so as to receive the heat from the heating plate 3.

As illustrated in FIGS. 6 and 7, the conventional mounting structure for the heat insulating plate 15 involves fixing a threaded rod 17 to the center of the heat insulating plate 15, and inserting the threaded rod 17 into the hole 21 of the heater base 20. The heat insulating plate 15 is fixed to the heating plate 3 by inserting the heat insulating plate 15 into the heating plate 3 and screwing and tightening the nut 22.

The heater base 20 is an integrally molded product made of, for example, aluminum die casting. On the other hand, the heat retaining plate 15 is a press-molded metal plate. These heat insulating plate 15 and heater base 20 need to be tightened with their facing surfaces 15a, 20a in close contact with each other to reduce thermal resistance as much as possible.

[Problem that the invention attempts to solve]

However, since the heat insulating plate 15 is a press-molded product, it is difficult to achieve flatness.
Since the structure is such that the nut 22 is tightened, even if the nut 22 is strongly tightened, the heat insulating plate 15 does not adhere evenly to the heating plate 3, creating a gap 24 between the heat insulating plate 15 and the heating plate 3, which reduces thermal resistance. There was a significant increase.

In order to fill this gap 24, a heat-resistant elastic plate made of a material with excellent thermal conductivity may be interposed, but in this case, the number of parts and the number of steps required for assembly increase, resulting in high costs.

[Means for solving problems]

The present invention is applied to a coffee brewer that is equipped with a heating plate equipped with a water boiling pipe and a heater, and a heat insulating plate is disposed on the upper surface of the heating plate. The present invention provides an inclined surface with a concave central portion on the part of the heating plate that faces the heat insulating plate, and also tightens the heat insulating plate and the heating plate to each other at approximately the center thereof using a tightening member. It is characterized by a heat insulating plate that is placed in close contact with the heat insulating plate.

[Effect]

In the coffee brewer having the above configuration, when the heating plate and the heat insulating plate are tightened together using the tightening member, the heat insulating plate is bent along the above-mentioned inclined surface of the heating plate, and the heat insulating plate is in close contact with the inclined surface. Thermal resistance between the heat insulating plate and the heat insulating plate is reduced, and the heat from the heater can be efficiently transferred to the heat insulating plate. Further, according to this structure, there is no need to interpose a material having excellent thermal conductivity between the heating plate and the heat insulating plate.

〔Example〕

In one embodiment shown in FIGS. 1 and 2, a heater base 2 constituting the main body of the heating plate 3
0 is a cast product made of aluminum alloy or the like, similar to the conventional product. However, it may also be a machined product. The heater base 20 has a generally circular planar shape. This heater base 2
A water boiling pipe 4 and a heater 5 using a sheathed heater or the like are buried around the 0. An end portion 4a of the water boiling tube 4 projects to the outside of the heater base 20.
Further, a hole 21 is formed approximately in the center of the heater base 20, passing through the heater base 20 in the vertical direction.

The heat retaining plate 15 is arranged on the upper surface side of the heating plate 3. The heat insulating plate 15 is press-molded from a metal plate such as aluminum or stainless steel as in the conventional one, and has a substantially circular planar shape. A threaded rod 17 is fixed to the center of the lower surface of the heat insulating plate 15 by spot welding or the like. A nut 22 is screwed onto this threaded rod 17. That is, the threaded rod 17 and the nut 22 constitute a tightening member. Note that the surface 15a of the heat retaining plate 15 facing the heating plate 3 does not have to be flat.

An inclined surface 30 is formed over almost the entire surface of the heating plate 3 at a portion thereof facing the heat insulating plate 15. The inclined surface 30 has a concave shape such that the central portion of the heating plate 3, that is, the hole 21 side is slightly lower. In other words, this inclined surface 3
0 forms a shallow "spindle shape" with the hole 21 at the center.

To attach the heat retaining plate 15 to the heating plate 3 having the above structure, the threaded rod 17 of the heat retaining plate is inserted into the hole 21 of the heating plate, and then the nut 22 is tightened to the heater base 20 as shown in FIG. By this tightening, the lower surface 15a of the heat retaining plate 15 is bent along the inclined surface 30, and the heat retaining plate 15 is brought into close contact with the inclined surface 30.

Therefore, the heat of the heating plate 3 is easily transferred to the heat retaining plate 15 side, and the temperature of the heat retaining plate 15 can be kept high. Since no gap is created between the heating plate 3 and the heat insulating plate 15, no intermediate member for heat conduction is required. Therefore, the number of parts is small and the assembly work is easy. Further, the inclined surface 30 is formed by molding the heater base 20 by casting or cutting.
Since the shape and dimensions of the inclined surface 30 can be processed with high precision, unlike in the case of press-formed products,
Close contact with the heat retaining plate 15 can be made more reliable.

Incidentally, the inclined surface 30 does not necessarily have to be provided on the entire surface facing the heat insulating plate 15. For example, as shown in FIG. 3, an annular inclined surface 30 centered on the hole 21 may be provided at a position away from the hole 21, and a region 31 inside this inclined surface 30 may be a flat recess.

Alternatively, as illustrated in FIG. 4, an inclined surface 30 may be formed around the hole 21 within a range of diameter R.

[Effect of idea]

According to the present invention, compared to conventional products in which the facing surfaces of the heating plate and the heat-insulating plate are flat, the heating plate and the heat sink are in close contact with each other, and the heat from the heating plate is transferred to the heat-insulating plate better. be able to.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a heating plate and heat insulating plate showing an embodiment of the present invention, Fig. 2 is a sectional view of the heating plate and heat insulating plate shown in Fig. 1 in a tightened state, and Figs. FIG. 4 is a sectional view of a heating plate showing another embodiment of the present invention, and FIG. 5 is a side view of a coffee extractor. FIG. 6 is a cross-sectional view of a conventional heating plate, and FIG. 7 is a cross-sectional view of the conventional heating plate with a heat insulating plate fastened thereto. 3... Heating plate, 4... Water boiling pipe, 5... Heater, 15... Heat insulation plate, 17... Threaded rod (tightening member), 20... Heater base, 22... Nut (tightening member), 30... ...Slope.

Claims (1)

[Scope of utility model registration request] In a coffee brewer comprising a heating plate provided with a water boiling pipe and a heater, and a heat insulating plate disposed on the upper surface of the heating plate, the heating plate has an inclined surface with a concave central portion facing the heat insulating plate. A coffee brewer characterized in that the heat insulating plate and the heating plate are fastened to each other at substantially the center by a tightening member, thereby bringing the heat insulating plate into close contact with the inclined surface.