JPS59108517A - Push-up and hot water storage type coffee brewer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a push-up hot water storage type coffee boiler for brewing coffee, tea, etc., and an object of the present invention is to provide a coffee boiler that can brew coffee, etc. in a short time using high-temperature boiling water. It is something.

BACKGROUND ART In recent years, coffee brewers have been used not only at home but also for professional purposes, and there has been a demand for quick brewing time and the ability to obtain delicious coffee.

As a coffee boiler that has the function of making delicious coffee quickly, there is a push-up hot water storage type coffee boiler that boils water in a hot water storage tank and pushes up the boiling water to pour the hot water into the coffee grounds. However, in this case, the water in the hot water storage tank was heated and the water temperature was controlled by a single heating element with constant power for heating and keeping warm, and a temperature control device that controlled it. For this reason, a temperature control device that controls the large power heating element required during heating also performs control during heat retention, but due to its characteristics, it is difficult to control small temperatures in the high power temperature control device. Therefore, a large temperature difference occurs in the temperature of the hot water during heat retention, and coffee, etc., is sometimes brewed using low-temperature hot water, which deteriorates the taste.

The present invention solves the drawbacks of the conventional push-up hot water storage type coffee brewer, and embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, 1 is an upper body, and this upper body 1 has an opening 2 on the upper surface at the rear of the upper surface, and a surrounding wall 3 is a box-shaped water storage that is higher than the upper surface of the upper body 1. A container 4 is formed. A drip hole 6 is provided at the bottom 6 of the water storage container 4.
The entire surface of the bottom part 6 is sloped toward the drip hole 6. 7 is a heating container made of aluminum or stainless steel, and at the bottom of the side of this heating container 7,
A band-shaped heat-generating part 8 of high power (600 to 120 watts) for heating covers the surrounding area and is attached in close contact.

Further, on the lower surface 9, there is a heat-retaining temperature control device 11 having a narrow 0N-OFF operating temperature range, such as a flat heat-generating part 10 with a small electric power (20 to 100 watts) and a temperature-sensitive reed switch for controlling it, and the above-mentioned A heating temperature control device 12 that controls the heat generating part 8 for heating is fixed to the bottom surface 9 of the heating container 7 at both left and right ends, and a spring member attached to a support fitting 13 having a space with the heating container 7 in the center part. The presser is attached to the heating container 7 in close contact with the presser metal fitting 14.
The ON operation temperature of this heating temperature control device 12 is set to be several degrees lower than the ON operation temperature of the heat retention temperature control device 11. On the lower surface of the water storage container 4, an introduction pipe 1 is provided in the drip hole 6 and connected to the heating container 7 via a drip pipe 16 and a joint 16, thereby forming a water conduit. The upper surface of the heating container has a discharge port 18 with an open tip, and a discharge pipe 19 that projects the discharge port 18 to the outside of the container on the side of the heating container, and a pipe 19 that extends above the rated water level of the water storage container 4. A steam pipe 20 with an open tip and protruding toward the heating container 7 is connected to an auxiliary container 21 that projects so that the water level is higher than a discharge port 18 provided at the top of the heating container 7. Therefore, the water storage container 4 has a through hole 22 through which the steam pipe 2o passes, rising from the bottom 6 to a point above the rated water level. The top surface 21' of the auxiliary container 210 is set at such a height that even if the hot water in the heating container 7 is brought to a boiling and stirring state, the surface of the hot water does not come into contact with it. When the intake port end face 19' of the heating container T side of Eve 19 is set to the water level of the rated water volume, and the rated water volume becomes near boiling water (over 95°C) and expands in volume. The parallel lower surface 191 of the discharge pipe 19 is located above the water level, and the lower end surface of the discharge port 18 is opened at a height equal to or lower than the suction port end surface 19'.

Therefore, when the heating container 7 is filled with water at the point where water starts to drip from the discharge port 18, the discharge pipe 19 acts as a siphon, and the rated water amount can be achieved.

The said joint 16 is a three-mouth joint, and the third end is connected to the drip pipe 15 and the introduction port 1, as shown above, and the remaining end is opened at the tip, The lower body 23 has a discharge operation section 24 on the front surface thereof, and is connected to a discharge pipe 26 having an opening/closing cock 26 that can be opened and closed. Reference numeral 27 denotes a heat insulating plate provided on the lower body 23 via a banking 28, and a heat insulating plate heater 29 is provided on the back surface. 30 is a decanter for receiving extracts such as coffee, and a basket 31 is located at the top.

In the above configuration, water is first supplied from the water storage container 4. The supplied water passes through the drip hole 6 from the water storage container 4, passes through the drip pipe 16, the joint 16, and the introduction pipe 17, and accumulates in the heating container 7. After filling the heating container 7 with water, it is heated to produce hot water and kept at around 96°C until it is used, but as shown in Figure 2, separate heat generation occurs during heating and when keeping warm. Since it has a body and a temperature control device, it is possible to perform the circuit operation shown below and narrow the time during which the heat retention temperature is set.

First, when the switch 32 is turned on, since the heating container 7 is initially cold, the heating temperature control device 12 also changes to the heat retention temperature control device 1.
0 is also in the OW state, and current flows through both the heat generating section 8 for heating and the heat generating section 10 for keeping warm as parallel circuits. Next, when the temperature of the hot water reaches an appropriate temperature of around 95°C, the currents are cut off at the same time because the contact opening temperatures of both the heating temperature control device 8 and the heat retention temperature control device 1° are set at approximately the same temperature. When the temperature of the hot water drops slightly, the heat retention temperature control device 11 is turned on and the hot water is heated by the heat retention heat generating section 1o, which requires less power.

That is, before the contact of the heating temperature control device 12 used for high power such as the heat generating part 8 for heating is turned on, the heat retention temperature control device 1
1 is turned on, and heat retention with a small temperature range is possible with the heat generating part 1o for heat retention using low power.

Next, the hot water that has reached the appropriate temperature is extracted, but since it is a push-up type, when a desired volume of water is poured into the water storage container 4, the hot water in the heating container 7 is pushed up due to the water level difference and passes through the discharge pipe 19. , from the discharge port 18 to the basket 31, and the heat insulating plate 27
It collects in the upper decanter 3o and is kept at a constant temperature by the heat insulating plate heater 29. When a small amount of water is added and the amount of hot water extracted is small, the temperature of the hot water at the bottom of the heating container 7 decreases.

Therefore, the heat retention temperature control device 11 is turned ON, but since the ON temperature of the heating temperature control device 12 is low, it is easily turned ON.
do not have. For this reason, only the heat generating part 10 for heat retention with a small power is energized, and since the heating density applied to the hot water in the heating container Y is small, strong nucleate boiling may occur on the outer surface of the heating container, and the water from the steam pipe 20 It is possible to raise the water to an appropriate temperature with extremely little steam ejection. In addition, since there is an auxiliary container 21 at the top of the heating container 7 which has a water level higher than the discharge port 18, the water level of the hot water after extraction is always regulated to a level where an air layer is created in the container due to the Zyphon phenomenon, and the temperature control device Even if the heating temperature control device 12 is turned on when the low-temperature water part on the outside of the heating container is below the top surface of the heating heating part 8 after extraction, the volume expansion of the hot water due to strong nucleate boiling inside the container will not occur in the auxiliary container. Since the hot water is absorbed into the steam pipe 21 and the surface of the hot water does not touch the top surface 21', only steam is spewed out from the steam pipe 20, and no hot water is spouted out.

Furthermore, a band-shaped heat generating part 8 for heating is provided on the outer surface of the heating container 7.
The heating unit 7 is made of a metal with good thermal conductivity such as aluminum or stainless steel, so the heat from the heating unit heats the water via the heating unit 7. The heating density (W/CJ) is lower than that of a conventional sheathed heater installed in water and the temperature of the heating element is lower. In addition, in the case of a sheathed heater, 90
Even when boiling water at a temperature of about C, strong nucleate boiling occurs in some parts of the heater, but in the case of this example, the nucleate boiling is much weaker and less.Also, MgO and calcium contained in the water When boiling, there is a phenomenon in which it rapidly solidifies and adheres to the heating element, and as this progresses, it becomes a solid substance in the form of fragments and is dispersed in the water, but in the case of the present invention, as described above, the heating vessel Since the water is heated, the oxidized components in the water are difficult to solidify, and it has the effect of making it possible to obtain hot water with few impurities.This effect is especially great when kept warm for a long time.Please note that after use, When discarding unnecessary water, it can be discharged by operating the discharge operation part 24, but since the discharge pipe 26 comes out from the lowest water level, there is no residual water in the heating container 7. Moreover, since the drain port 33 is opened downward, water can be drained safely.

As is clear from the above explanation, the push-up hot water storage type coffee boiler of the present invention has a heat generating part for heat retention in addition to the heat generating part for heating, and also has a heat retention temperature device with a narrow 0N-OFF operating temperature range. As a result, hot water with a small temperature range can be obtained at any time, and nucleate boiling during heating is extremely low, resulting in less steam loss and safety.Also, since the heat generating part is installed on the outside of the heating container, hot water can be easily obtained. It is difficult for impurities to get mixed in, and it is possible to extract delicious coffee, etc., and its practical value is extremely high.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a push-up type hot water storage type coffee boiler showing an embodiment of the present invention, and FIG. 2 is an electric circuit diagram thereof. 2...Opening, 4...Water storage container, 5...
Bottom, 6...Dripping hole, 7...Heating container, 8.
... Heat generating part for heating, 1o... Heat generating part for keeping warm, 11
... Warming temperature control device, 12 ... Heating temperature control device, 19 ... Discharge pipe. Figure 1 Figure 2 J?

Claims (1)

[Claims] (1) A water storage container having an opening on the upper surface and a dripping hole on the lower surface is provided above the metal heating container, and the heating elements of the heat generating part for heating and the heat generating part for keeping warm are provided in the lower part of the heating container, and A push-up hot water storage type coffee boiler, characterized in that the drip hole of the water storage container and the bottom of the heating container are connected to form a conduit, and a discharge pipe with an open tip and an outwardly protruding discharge pipe is provided at the upper end. vessel. (≧ Claim 1, wherein the heating container is provided with a heat generating part for heating, a heating temperature control device for the heat generating part for heating, a heat generating part for keeping warm, and a keeping temperature control device for the heat generating part for keeping warm) The push-up hot water storage type coffee boiler according to claim 1. The push-up hot water storage type coffee boiler according to claim 1, wherein the heat generating part and the temperature control device are attached to the outer surface of the heating container.