JPS6017525B2 - Heaters for coffee makers, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heater for a coffee maker or pot, etc., and more specifically, in a coffee maker or pot used mainly at home, water in a tank is guided to a heating part through a pipe. This relates to a heater for an appliance that heats and uses the area.

Conventional heaters have two grooves on a substrate made of a material with good thermal conductivity, one of which has a sheathed heater embedded in it, and the other one with a water pipe, allowing the heat from the sheathed heater to flow through. was constructed so as to conduct it indirectly to this water pipe. With this kind of configuration, the heat from the heater is conducted through the base material, so if the heat output of the heater is increased, the temperature of the heater will quickly exceed its allowable temperature.
There was a risk of damaging the heater itself. Therefore, the amount of heat generated by the outer surface of the unit of the heater is inevitably limited, and when a large amount of heat is required, there is a problem that the overall structure of the heater becomes large. Therefore, the present invention has been made to solve the above-mentioned problems.Even if the amount of heat generated per unit area of the outer surface of the heater is increased, the heater itself does not become abnormally heated. The object of the present invention is to provide a heater that can sufficiently heat the.

The drawings showing the embodiments of the present application will be described below.

In the coffee maker 1 shown in FIG. 1, 2 is a frame, which is generally made of synthetic resin material. 3 indicates the pot battle layer, and is the part where pot 4 is played as a battle hawk.

Reference numeral 5 denotes a heater attached to the lower surface of the pot layer 3 inside the frame 2, 6 a water tank formed inside the frame 2, and a water inlet 12 above the tank provided with a lid 13 that can be opened and closed. It is being

A water pipe 7 connects the water tank 6 and the radiator 5, and is made of a silicon tube.

Reference numeral 8 denotes a check valve that prevents water from flowing back from the water pipe 7 to the water tank 6.

Reference numeral 9 denotes a hot water pipe having one end conveyed to the heater 5, and the other end serving as a dripping port 10 above the pot layer 3.

Note that this hot water supply pipe 9 is made of aluminum or the like. Further, reference numeral 11 indicates a connecting tube, which is constructed using a silicone tube. Next, FIGS. 2 to 4 showing details of the heater 5 will be explained.

14 is a base made of a material with good thermal conductivity such as aluminum or aluminum alloy. It is made by casting.

In this base body 14, 15 is a saddle mounting groove, and 16 is a component mounting portion, which is a portion to which a thermostat or a thermal fuse is mounted. Reference numeral 17 denotes a counterfeit part attachment surface, which is a surface to be attached to the back surface of the pot stacking part 3.

Next, reference numeral 18 shows a sheathed heater mounted competitively in the iron mounting groove 15, which is formed to have a rectangular cross section, and whose structure is a well-known structure. That is, a heating wire 21 formed in a coil shape from nichrome or other heat generating material is filled inside a pipe 19 made of aluminum together with an insulating filler 20 such as magnesium oxide, and a terminal is attached to the end of the heating wire 21. It is constructed by connecting the blades 23. Note that 22 indicates an insulating material such as silicone rubber interposed between the pipe 19 and the dowel bar 23 at the end of the pipe 19, and 24 indicates a terminal plate fixed to the terminal bar 23 to which the lead wire is connected. This shows a member made like this. Next, reference numeral 26 indicates a water pipe which is iron-filled in a superposed state with the sheathed heater 18 on the open side of the drum groove 15 (the upper side in FIGS. 2 and 3), and is made of a material with good thermal conductivity and workability, such as aluminum. It is formed into a rectangular cross section as shown in the figure. Note that 26a represents an end port connected to the water pipe 7, and 26b represents an end port connected to the moat pipe 9, each of which is formed to have a rectangular cross section for easy connection. In the above-mentioned Yokinari heater, when the sheathed heater 18 is energized, the sheathed heater 18 generates heat.

The heat is transferred to the water tube 26 via the mutually flat contact surfaces 18', 26' of the sheathed heater 18 and the water tube 26. Therefore, the water pipe 2 is connected from the water tank 6 to the water pipe 7.
The water that has flowed into the chamber 6 is heated by the heat and becomes hot water, which rises through the hot water pipe 9 and drips from the drip opening 10. Further, as described above, the heat generated by the sheathed heater 8 is also transmitted to the base body 14, and further warms the pot 4 placed thereon via the pot mounting portion 3. In addition, the temperature of each part in the above-mentioned energized state is such that, for example, the surface of the pipe 19 in the sheathed heater 18 is about 18
At 0:00 o'clock, the surface of the base 14 is 130 to 140 oo, and the portion 26'' of the water pipe 26 exposed from the entrance of the horizontal groove 15 is about 130 qo.Next, the heater 5 with the above-mentioned foundation is
The manufacturing procedure will be explained.

First, the base body 14, sheathed heater 18, and water tube 26 are each manufactured by a well-known method. In addition, the iron fitting groove 1 in the water pipe 26
The part inserted into 5 is semi-cylindrical with a flat contact surface 26' as shown in FIG. 5C. Note that this formation is generally performed using a press device. In each section formed as described above, the sheathed heater 18 is first inserted into the welding groove 15 of the base body 14 as shown in FIG. 5A.
5B', and is further pushed to the bottom of the iron mounting groove 15 by the pressing member 27, as shown in FIG. 5B'.
Note that this pressing is generally performed using a press device. Next, the water tube 26 is inserted into the iron groove 15 in the base body 14 as shown in FIG. 5C. Furthermore, this water pipe 26
The sheathed heater 18 is also pressed into the shading groove 15 by the pressing member 27 as shown in FIG. 5D. Note that during this pushing, the water tube 26 is deformed by the pressing member 27 and assumes a rectangular cross-sectional shape as shown in FIG. 5D. Next, as shown in FIG.
And the water pipe 26 is fixed. Next, FIG. 6 shows an example in which the shape of the heat radiator is different, and shows an example in which the shape can be arbitrarily changed depending on the purpose for which the heater is attached and used.

It should be noted that parts that are functionally the same or equivalent to those in the previous figure are given the same reference numerals as in the previous figure with the letter e, and redundant explanations are omitted. As described above, in the present invention, since the sheathed heater 18 and the water pipe 26 are loosely inserted into the single iron groove 15 provided in the base body 14 in an overlapping manner, the heat generated from the heater 18 is reduced. It has the advantage that it can be directly transmitted to the water pipe 26 and can effectively heat the water inside the water pipe.

Furthermore, in this case, the heater 18 and the water tube 26 are in contact with each other even if they are flat surfaces, so the efficiency of heat transfer from the heater 18 to the water tube 26 is extremely high, and as a result, the internal heat generation amount per unit outer surface of the heater 8 is greatly increased. Even if the sheathed heater itself is heated, there is no risk of abnormal heating and damage to the sheathed heater itself, and it has the revolutionary effect of producing a large amount of heat.

Moreover, in the present invention, for the iron groove 15 having a depth in the central axis direction of the base body 14 (in the vertical direction in the drawing),
A sheathed heater 18 is located deep inside, and a water pipe 26 is located on the open side.
Since the heater 18 and the water tube 26 are embedded in a superposed state with the heater 18 and the water tube 26 located in a state where the And even if the water pipe 26 is required to be formed into an annular body, its radial dimension can be reduced to make it smaller and more compact, which can be used to reduce the size of a coffee maker or pot, or to add a heater to a container. It is effective in significantly reducing the occupancy rate.

Furthermore, if we look at this from a different perspective, assuming that the occupation ratio of the heater to the container of the coffee maker or pot is constant, then the amount of heat generated by the heater can be significantly increased to increase the time required to heat the water. There are benefits that help provide a significantly shorter and more efficient coffee maker or kettle. Furthermore, in the present invention, the heater 18
Since the sheathed heater 18, which has a high surface temperature, is covered on all four sides by the base body 14 and the water pipes 26, the water pipes 26 are located at the open side of the bales groove I5. Therefore, the surface temperature of the heater as a whole can be kept relatively low.

This has the effect of ensuring sufficient safety even when the heater is placed close to the frame of the coffee maker or pot made of synthetic resin material. Furthermore, the surfaces of the heater 8 and the water pipe 26, each having a rectangular cross section, that face the bottom or side surface of the iron groove 15 are in contact with the respective surfaces as shown in FIG.
The heat emitted from the heater 18 in all directions around it is directly transmitted to the water pipe 26 on one side, and is transmitted to the water pipe 26 via the base 14 on the remaining three sides, that is, the heat is efficiently transmitted to the water pipe 26. There is also the advantage that high thermal efficiency can be obtained.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a longitudinal sectional view of a coffee maker, FIG. 2 is a perspective view of a heater, FIG. 3 is a sectional view taken along the line mm in FIG. 2, and FIG. 5 is an exploded perspective view of the heater, FIG. 5 is a sectional view showing the order of assembly, and FIG. 6 is a perspective view showing an example of a heater of a different shape. 5... Heater, 14... Base body, 16... Gunwale, 18... Sheathed heater, 26... Water tube, 18', 26
'...Contact surface. Figure 2 Figure 6 Figure 1 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1 A fitting groove with a depth in a direction parallel to the central axis of the base is formed around the base, and the area around this groove is made of a material with good thermal conductivity similar to the base. A sheathed heater with a rectangular cross section and a water tube with a rectangular cross section are placed in the fitting groove in such a manner that the sheathed heater is located deep in the fitting groove and the water tube is located on the open side of the fitting groove. In the embedded state, the facing surfaces of the sheathed heater and the water tube are in contact with each other with flat surfaces, and the surfaces of the heater facing the bottom and both side surfaces of the fitting groove are in contact with those bottom surfaces. and in contact with both sides respectively,
A heater for a coffee maker, etc., characterized in that both sides of the water pipe are in contact with both sides of a fitting groove.