JPH0677541B2 - Electric coffee heater - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an electric coffee boiler for extracting coffee.

2. Description of the Related Art A conventional coffee heater of this type has a structure as shown in FIGS. 7 and 8.

That is, the raw material crushing chamber 4 provided with the cutter 3 which is rotationally driven by the motor 2 built in the main body 1 and the perforated plate 5 forming a part of the side wall of the raw material crushing chamber 4 are arranged in parallel. The coffee powder, which has a filtration chamber 6 and is crushed by the cutter 3 to have an appropriate particle size in the raw material crushing chamber 4,
It passes through the perforated plate 5 and is accumulated in the filtration chamber 6.

After that, the water contained in the tank 7 passes through the water pipe 8 and is heated by the heating device 9 and sent to the flow path switching device 10. On the other hand, this flow path switching device 10 is initially switched to the tank 7 side, and the heated water returns to the tank 7. When this process is repeated and the water temperature in the tank 7 rises to a certain degree, the temperature sensing element 11 provided outside the water pipe 8
Is activated, and an appropriate switching device such as a solenoid valve linked with this is activated.
, The flow path switching device 10 was switched to the side of the filtration chamber 6 and dropped from the discharge port 13 into the filtration chamber 6 to extract the coffee liquid.

In the initial stage, the water in the tank 7 is returned, heated to a high temperature, and then sent to the filtration chamber 6 to remove bad components (for example, chlorine) contained in water in the process of heating and circulation and extract delicious coffee. This is because

Problems to be Solved by the Invention However, such a configuration has the following problems.

That is, the temperature sensing element 11 that detects the water temperature in the tank 7
Since the water pipe is attached to the outside of the water pipe, the water temperature is detected through the water pipe 8, and therefore the water pipe 8
The temperature of the water pipe 8 changes due to variations in the degree of contact with the temperature sensing element 11 and variations in the heat radiation of the water pipe 8 due to room temperature, etc. It is difficult to be transmitted to the element 11.

If the water temperature in the water pipe 8 is not correctly transmitted to the temperature sensing element 11, the following problems will occur.

In other words, if the temperature sensing element 11 operates too early, the flow path switching device 10 switches before the temperature of the water in the tank 7 rises, and the defective component in the water cannot be sufficiently removed before being sent to the filtration chamber 6. And the unhealthy coffee is extracted.

On the other hand, if the operation of the temperature sensitive element 11 is too slow, the temperature of the water in the tank 7 rises too much, which has a thermal adverse effect on the components of the machine body and reduces the durability of the machine body.

Therefore, the present invention provides a coffee brewing device for correctly detecting the water temperature in the tank to extract delicious coffee and improving the thermal durability of the machine body.

Means for Solving the Problems And the technical means of the present invention for solving the above problems,
A filtration chamber for extracting coffee, a tank for storing water, a water heating device, and a water passage device, wherein the water passage device includes a space chamber, a water pipe heated by the heating device, and a filtration chamber. A flow path switching device for switching the flow path to the upper part of the tank, wherein the space chamber is connected to the tank through the drain port of the tank, and the check valve for blocking the flow of water to the tank side. In this structure, a temperature-sensing element having a temperature-sensing portion exposed is connected to each of the water passages and a flow passage between the check valve and the flow passage to the tank.

Operation The effects of this technical means are as follows. That is, in the space room of the water passage device, the water temperature is set in the flow path between the portion communicating with the drain port of the tank and the check valve communicating with the water pipe heated by the heating device through the check valve. Since the temperature-sensitive part of the temperature-sensitive element for detecting the temperature is exposed, the water directly contacts the temperature-sensitive part of the temperature-sensitive element, so that the water temperature can be detected extremely accurately.

Therefore, the defective components of the water in the tank can be surely removed, the delicious coffee is extracted, and the water temperature is not increased more than necessary. Therefore, the thermal durability of the airframe is not impaired.

Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 to 6, reference numeral 21 denotes a material crushing chamber which is provided in a main body 22 and internally has a cutter 23.
23 is driven in a substantially horizontal direction by a motor 24 provided via a rubber vibration isolator 25. Reference numeral 26 indicates a seal member of the motor shaft 27.

The material crushing chamber 21 includes a stock chamber 28 for storing coffee beans and a mill chamber 29 for crushing coffee beans with a cutter 23.
The coffee beans stored in the stock chamber 28 are sequentially sent to the mill chamber 29 and continuously crushed.

The coffee beans crushed in the mill chamber 29 and having a particle size of an appropriate size pass through the perforated plate 30 provided below the material pulverization chamber 21, and are accumulated in the filtration chamber 31 attached to the perforated plate 30. It is supposed to be done.

A tank 32 for storing water, which has a drainage port 33 on the lower surface, is detachably attached to the main body 22, and a water passage device 34 is provided so as to be connected to the drainage port 33 of the tank 32.

The water flow device 34 has a space chamber 35 whose upper surface is formed by an inclined portion, and which is inside the space chamber 35 and is approximately vertically below the drain port 33 of the tank 32. Temperature sensor 36
Exposed temperature sensor 37 such as thermostat
Is stuck.

The temperature sensitive element 37 is fixed by an appropriate method via a heat insulating member 38 such as silicone. A water flow stirring member 39 is provided in the vicinity of the temperature sensing portion 36 of the temperature sensing element 37, and a check valve 40 of an appropriate system is provided in the water passage device 34.

On the other hand, the space chamber 35 continues to have a heating device 41 such as a heater.
The water pipe A42 adjacent to the water pipe A42 and the flow passage switching device 43 for switching the flow passage in two directions by an appropriate method are connected to each other, and the water pipe B44 divided into two from the flow passage switching device 43 is located above the tank 32.
The water pipe C45 communicates with the filtration chamber 31.

That is, the water passage device 34 provided in connection with the drainage port 33 provided in the tank 32 is composed of the space chamber 35 → the water passage pipe A42 → the flow path switching device 43 → the water passage pipe B44 or the water passage pipe C45. There is.

A motor timer 47 is associated with the temperature sensing element 37, and a cam (not shown) interlocked with the motor timer 47.
The actuating lever A48 and the actuating lever B49 are thereby displaced, and the actuating lever B49 mechanically switches the flow passage in the flow passage switching device 43.

In addition to the above configuration, for example, the flow path of the flow path switching device 43 can be switched by an electromagnetic valve that operates in association with the operation of the temperature sensitive element 37.

Further, the internal structure of the flow path switching device 43 is for simply branching the water flow in two directions, and there are various types of systems that are commonly used in daily life.

Based on the above configuration, the operation and action will be described next. lid
Open 46, put coffee beans in stock chamber 28, turn on the power, motor 24 will rotate, and from stock chamber 28 to mill chamber 29
The coffee beans that were guided to were crushed by the cutter 23 and then perforated.
It passes through 30 and is accumulated in the filtration chamber 31.

Thereafter, the heating device 42 is energized, the water pipe A42 provided adjacent to the heating device 41 is also heated, and the water in the water pipe A42 is boiled. At this time, the boiling water in the water pipe A42 is sent to the flow path switching device 43 by the vapor pressure due to the boiling of water. Then, the inside of the water pipe A42 becomes a negative pressure, so that the water in the tank 32 passes through the space chamber 35 again.
It is introduced and heated again.

The backflow of the boiling water to the space chamber 35 side is prevented by the action of the check valve 40.

The flow path switching device 43 is initially connected to the water flow pipe B44, and therefore the boiling water sent to the flow path switching device 43 returns to the tank 32 again through the water flow pipe B44.

The above process is repeated in sequence, and the water temperature in the tank 32 is 70 ℃
The temperature rises to about 75 ° C., and in this process, the bad components (for example, chlorine) of water in the tank 32 are removed.

When the temperature of the water in the tank 32 reaches 70 to 75 ° C, the temperature sensitive element 37 is set to operate. When the temperature sensitive element 37 operates, the motor timer 47 is energized and the operating lever B49 is displaced by the operation of the cam. However, the flow passage of the flow passage switching device 43 is the water passage pipe C45.
Is switched to.

The water flow pipe C45 communicates with the discharge port 50 provided in the material crushing chamber 21, and the boiling water flows into the material crushing chamber 21, and the filtration chamber
The coffee component is guided to 31 and passes through the coffee powder accumulated in the filtration chamber 31 to extract the coffee components, and the coffee liquid is dropped into the coffee container 51.

The most important point in this configuration and operation is the detection accuracy of the temperature sensitive element 37, that is, how to accurately detect the temperature of the water flowing from the tank 32 through the water passage device 34.

Therefore, in this embodiment, the temperature sensing unit 36 of the temperature sensing element 37 is
Is exposed inside the water flow device 34. That is, the water flowing through the water flow device 34 and the temperature sensing section 36 of the temperature sensing element 37 are in direct contact with each other, and therefore the temperature sensing element 37 can detect the water temperature accurately in real time.

EFFECTS OF THE INVENTION As is clear from the description of the above embodiments, the present invention relates to a temperature sensing part of a temperature sensing element for detecting a water temperature, a part communicating with a drain port of a tank in a space room of a water passing device, and a heating device. Since it is configured to be exposed in the flow path between the check valve that communicates with the water pipe that is heated by the check valve, the water temperature can be detected accurately, and the water temperature in the tank can be optimized. It can be sent to the filtration chamber. Therefore, it is possible to sufficiently remove bad components such as chlorine in water and extract delicious coffee, and it is also possible to prevent the temperature of water in the tank from rising too much and having a thermal adverse effect on components of the aircraft. .

[Brief description of drawings]

FIG. 1 is an enlarged vertical cross-sectional view of an essential portion around a material crushing chamber of an electric coffee boiler according to an embodiment of the present invention, and FIG. 2 is an enlarged longitudinal section of a tank-water passage device of the electric coffee boiler. Fig. 3, Fig. 3 is a sectional view taken along the line A-A in Fig. 2, Fig. 4 is a bottom view of a main part of the electric coffee whisk, and Fig. 5 is a plan view of a main part of the electric coffee whisk. FIG. 6 is an overall perspective view of the electric coffee boiler, FIG.
FIG. 8 is a vertical sectional view showing a conventional electric coffee heater, and FIG. 8 is a model diagram showing the operation of the electric coffee heater. 31 …… Filtration room, 32 …… Tank, 34 …… Water passage device, 36 ……
Temperature sensor, 37 ... Temperature sensor, 41 ... Heating device, 43 ... Flow path switching device.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hideaki Kobayashi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Hajime Miyoshi, 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 56) References JP-A-60-45324 (JP, A)

Claims (1)

[Claims] 1. A filtration chamber for extracting coffee, a tank for storing water, a water heating device, and a water passage device, wherein the water passage device is a space chamber and a passage heated by the heating device. A flow path switching device for switching the flow path between the water pipe and the filtration chamber and the upper part of the tank is provided, and the space chamber is a check valve that blocks the flow of water to the tank via the drain port of the tank and to the tank side. An electric coffee boiler having a temperature-sensing element having a temperature-sensing portion exposed in a flow path between a check valve and a flow passage to a tank, which communicates with the water pipes via valves.