JPS61172518A - Electric pot apparatus - 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 Field of the Invention The present invention relates to an electric water boiler used for brewing coffee, etc., for commercial or household use.

BACKGROUND OF THE INVENTION In general, in this type of electric water heater, it is desired that the water supplied by the pump be heated to a high temperature after a short period of preheating, and that the water be instantaneously boiled to a predetermined temperature.

For this reason, for example, a conventional electric water heating device used in a brewing device for brewing coffee or the like has a configuration as shown in FIG.

That is, in this FIG. 4, 1 is a heater block, which consists of a block body 2, an upper cup (-3), and a lower cover 4, and is made of a good thermal conductor such as aluminum. is a spiral water channel groove 5 on the surface.
, and a spiral heating element 6 is embedded in the back surface. Further, a through hole 7 is provided in the center thereof in communication with the water channel groove 6. 8 is a seal ring provided on the outer periphery of the block body 2, and an upper cup (-3) is watertightly provided to close the upper surface of the groove 6 to form a water channel 6a. A recess 1o having an opening 10a that communicates with the through hole 7 in a watertight manner through an O-ring 9 is provided, and a valve 11 that closes the opening 10a and a valve spring 12 that biases the valve 11 are provided in the recess 1o. A valve seat 13 is screwed onto the valve seat 13.A diffusion plate 14 is screwed onto the valve seat 13 with a mounting screw 15.An electromagnetic pump 16 is connected to a water container 17 through the pump 16. A suction pipe 18 with one end opened at the bottom of the heater block 1 is connected to a connecting pipe 19 that communicates with the water channel 61L of the heater block 1 formed by the groove 6 of the block body 2.

Reference numeral 2o denotes a hook plate with a central opening provided at the lower part of the lower cover 4, and around the central opening of the hook plate 20, a plurality of hooks are provided around the upper end of the filter holder 22 equipped with a handle 21. A plurality of notches 24 into which the filter holder 23 is loosely fitted, and a plurality of retaining pieces 25 which are engaged with the claw 23 when the filter holder 22 rotates after the claw 23 is loosely fitted are provided. 26 is a filter housed in the filter holder 22, and 27 is a seal backing that is engaged with the lower cover 4 and comes into airtight contact with the upper end of the filter 26. Note that an outlet 28 is provided at the bottom of the filter holder 22.

Reference numeral 29 is a receiving plate provided with a large number of holes for placing a demitasse coffee cup 3o containing this type of coffee, and 31 is a receiving plate. Reference numeral 32 denotes an automatic temperature regulator that is attached to the block body 2 with its heat sensitive part in close contact with the block body 2;
2 limits the power supply to the heating element 6 and controls the temperature of the heater block 1. 33 is coffee powder.

The operation of the electric water heater configured as described above will be described below.

First, fill the water container 17 with the required amount of water. Next, heating element 6
When energization is started, the temperature is controlled to a predetermined temperature by the automatic temperature controller 32.

Next, the filter 26 placed in the filter holder 22
A predetermined amount of coffee powder 33 is placed inside and rotatably engaged with the hook plate 2o. The preparation for coffee extraction is now complete.

Next, the demitasse coffee cup 3o is set on the receiving plate 29 which is almost directly below the outlet 28 of the filter holder 22, and the pump 16 is activated. 70 is pumped into the main body 2 via the connecting pipe 19. The water pumped into the block body 2 is boiled by heat transfer from the heater block 1 while passing through the spiral waterway S & becomes hot water, passes through the through hole 7 , and presses the valve 11 . energize, diffuser plate 1
The coffee liquid passes through the coffee grounds 33 through the coffee powder 33, and the coffee liquid is extracted, flows out from the outlet 28, and is poured into the demitasse coffee cup 3o, thereby producing coffee.

On the other hand, the temperature of the heater block 1 decreases as heat is taken away by the water. Then, the automatic temperature regulator 32 is activated to energize the heating element 6 again to raise the temperature of the heater block 1, and when it reaches a predetermined temperature, the automatic temperature regulator 32 is activated again.
2 operates to stop energizing the heating element 6 and maintain the temperature of the heater block 1 within a certain range.

Problems to be Solved by the Invention In such a conventional configuration, the temperature of the heater flock 1 is controlled by the automatic temperature controller 32 to about 90% due to its water heating characteristics.
The temperature is controlled between 0 and 110°C. Therefore, when the extraction of coffee etc. is completed, the waterway 5! The water remaining in L is heated more than necessary and expands, and some of this hot water flows through the openings 10 &
The other hot water flows into the connecting pipe 19 and heats this connecting pipe 19 and the pump 16. As a result, the connection pipe 19 and pump 16 need to be heat resistant, so a tube made of Teflon resin or the like is used for the connection pipe 19, and the pump 1
In No. 6, the vicinity of the outlet had to be constructed using polyacetal resin or the like, which caused a significant increase in cost.

The present invention solves these problems, and aims to provide an electric water heating device in which pressurized water injection means such as a pump and pipes are not affected by heated hot water in a waterway.

Means for Solving the Problems In order to solve the above problems, the present invention includes a pressurized water injection means such as a pump, and a heater, and an injection port communicates with the pressurized water injection means via a pipe. It has a water boiling unit equipped with a water channel, and a storage section for extractables, etc., which communicates with the spout of the water channel, and allows only one of the pressurized water injection means to pass through the water boiling unit's injection port. It is equipped with a check valve device.

Effect: According to this configuration, even if the residual water in the water channel of the water heating unit is heated and expanded upon completion of extraction, it will not flow into the pressurized water injection means due to the presence of the check valve device. As a result, the pipes and pressurized water injection means are no longer heated.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In FIGS. 1 and 2, 41 is a base, and 42 is a bottom plate. This bottom plate 41 has rubber legs 43, and fixedly supports the base 41 via side plates 44. 45 is base 4
The water tank 46 is provided with an opening 46 at the bottom thereof, and this opening 46 is communicated with an inlet 49 of an electromagnetic pump 48 via a communication bushing 47. The pump 48 is attached to the base 41 via a vibration-proof rubber 5o. 51 is a water boiling unit, and this water boiling unit 61 includes a substantially cylindrical heater 52,
Approximately 30 throats in diameter and approximately length! It is approximately cylindrical with a diameter of 9 ohm, and has a continuous spiral shape on its outer periphery from one end to the other, with a cross-sectional area of approximately 1.
1- groove 63 is provided, and O-ring grooves 54 are provided at both ends thereof, and a thermal diffusion compound containing silicon as a main component is filled between the heater 52 and the heater 62.
A water pipe 66 is made of a good thermal conductor such as a copper alloy and is internally arranged to have a good thermal conductivity, and a water pipe 66 is formed into a substantially rectangular shape with a good thermal conductor such as aluminum die-casting, and has a substantially cylindrical long hole in the center. The long hole of the heater block body 68 accommodates a water tube 66 with a □ IJ ring 69 attached to the O-ring groove 64 at both ends thereof.
A spiral water channel 61 is formed between the inner wall of the elongated hole and the groove 63 of the water pipe 66.
is formed airtight. Note that the water pipe 66 is screwed onto the heater block main body 68 with a mounting screw 62.

Further, in the heater block body 58, a check valve 64, which communicates with the outlet of the pump 48 through a vibro 3 made of synthetic resin such as nylon resin, is screwed onto the thick wall surface on the right side near the entrance of the elongated hole. An inlet 66 is provided, and an outlet 66 is provided on the lower thin wall near the back of the elongated hole, so that the water channel 61 communicates airtightly from the inlet 66 to the outlet 66. 67 is the lead wire 6 of the heater 52
This is the terminal plate welded to 8.

Reference numeral 69 designates a first automatic temperature controller of a disc bimetal type, which is thermally provided by a fastener 70 and tightened with a first screw 71 from the center of the right side of the thick wall surface of the heater block main body 68 toward the injection port 66. . Reference numeral 72 denotes a second automatic temperature controller of laminated metal type that is heat-sensitively provided by tightening with a second screw 73 from the center of the left side of the thick wall surface of the heater block main body 68 toward the spout 66.

Further, a drainage lower 4 is provided on the left thick wall surface facing the injection port 66 near the entrance of the elongated hole of the heater block main body 58, and a safety valve 75 is screwed onto the drainage lower 4. This safety valve 76 presses the operating valve 7551L via a spring 75b by a rail 78 provided on a lever 77 that is slidable in conjunction with a handle 76 configured to be freely rotatable below the heater block main body 58. When the rail 78 is not pressed and is not in the operating state, the water channel 61 is opened.

Reference numeral 79 denotes a capsule stand, and this capsule stand 79 has a recess in the center, a drip hole 81 in the center of the recess, and a capsule 83 in which coffee powder or the like 82 is sealed is placed. . Reference numeral 87 denotes an elevating plate, and this elevating plate 87 is provided integrally with the capsule stand 79. 9o is a ring rotatably equipped with a holder 96 provided with the handle 76. Reference numeral 100 denotes a guide ring, which is provided with a nozzle 104 having an acute-angled f-shape at the top of the storage portion 103 of the capsule 83, and a nozzle hole 106 in the tapered portion of this nozzle 104.

109 is a pair of hook plates provided on the capsule stand 79;
111 is a water tank lid, 116 is a demitasse coffee cup, and 116 is a receiving plate.

Next, the main electric circuits will be explained. 3, a diode 120 serving as a half-wave rectifier is connected in series with the second automatic temperature controller 72, and a first automatic temperature controller 69 is connected in parallel to this series connection. Further, this parallel connection body and the heater 62 are connected in series.

On the other hand, the pump 48 is operated via the pump switch 117a.
The circuit is connected to both ends of the series connection body formed by the first automatic temperature controller 69, the second automatic temperature controller 72, the diode 119, and the heater 52, and is connected to the power supply 120 via the power switch 117. It consists of

To explain the operation in the above configuration, first, the water tank 46
When a predetermined amount of water is poured into the heater block 1 and the power switch 117 is operated to start energizing the heater 52, the heater block 1 is controlled to a predetermined temperature by the first and second automatic temperature controllers 69 and 72. start.

Next, by placing the capsule 83 on the capsule stand 79 and pushing the handle 76, the capsule stand 79 is raised together with the elevator stand 87 via the handle 77, and then the handle 79 is raised together with the elevator stand 87.
6 to engage the holder 96 and the hook plate 109. As a result, the capsule 8 placed on the capsule stand 79
3 is stored in the storage section 103 of the guide ring 100,
The nozzle hole 106 opens inside the capsule 83.

Next, a demitasse coffee cup 115 is placed on top of the barley rice 116. In this state, when the ponto switch 117a is operated, the pump 48 is activated, and water flows into the suction port 49 of the pump 48 from the opening 46 at the bottom of the water tank 45 via the communication bushing 47. The water pressurized by the pump 48 passes through the pump 48 through the pump 48, through the pump 63, through the check valve 64, through the inlet 66 of the heater block body 58, and into the spiral water channel 61. Since the water boiling unit 51 is heated to approximately 90'C to 106°C, water absorbs heat from the grooves 63 of the water pipe 56 and the inner wall 60 of the block body 58 while flowing through the spiral waterway 61, and boils. The water becomes immediately hot and flows out through the spout 66. The hot water flowing out from the spout 66 of the water boiling unit 61 is poured into the ring 9o.
The coffee powder is energized through the nozzle hole 1o6 and is ejected onto the coffee powder 82 in the capsule 83 to form coffee liquid, which is then dripped and stored in the demi-female coffee cup 115.

On the other hand, the temperature of the water heating unit 61 decreases because the amount of heat is taken away by the water passing through the water channel 61. When the temperature of the hot water flowing out from the spout 66 drops to about 86°C, the temperature at a position near the spout 66 from the center of the left side of the thick side surface of the heater block body 68 drops to about 9°C, and the second The automatic temperature regulator 72 of the water heater unit 5 is activated and the circuit is closed.
1's temperature rises again.

The coffee extraction time is about 30 seconds, and the amount of water flowing at that time is about 10,000 to 60 cc/30 seconds.

According to this embodiment, when the extraction of coffee or the like is completed, the electricity supply to the water heating unit 51 whose temperature has decreased due to the extraction of the coffee or the like is restarted, and the temperature rises again.
The remaining water in the water channel 61 is heated and expands, but the backflow valve 64 prevents the heated water from flowing out from the inlet 65 of the water heating unit 61, so the vibro 3 and pump 48 are heated. There will be no more. Therefore, the heat resistance of the vibro 3 and the pump 48 is unnecessary, and as a result, an inexpensive product with good productivity can be obtained.

Effects of the Invention As described above, according to the present invention, there is provided a water heating unit including a pressurized water injection means such as a pump, a heater, and a waterway through which an injection port communicates with the pressurized water injection means via a vibrator. , a storage section for extractables, etc. communicated with the outlet of the waterway, and a check valve device is provided at the inlet of the water boiler unit to allow passage of only one side from the pressurized injection means. Because of this, even if the remaining water in the water channel is heated and expanded when the extraction of the material to be extracted is completed, it will not flow into the pressurized water injection means due to the presence of the check valve device. As a result, the pipes and the pressurized water injection means do not require heat resistance, so productivity can be increased.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of essential parts of an electric water boiler showing an embodiment of the present invention, Fig. 2 is a cross-sectional diagram of the electric water boiler, Fig. 3 is a 6th view of the electric water boiler, and Fig. 4 is a conventional one. FIG. 2 is a cross-sectional view of an electric water heater. 48...Pump, 51...Water boiling unit, 52...Heater, 61...Waterway,
63 ``''``''''b, 64... Check valve, 65...
...Inlet, 66...H outlet, 82...
...Coffee powder, 83 ...Capsules, 10
0... Guide ring, 1o3... Storage department 0 Name of agent Patent attorney Toshio Nakao and 1 other person 48-Bo/g 83-jj Buyar Figure 3 Figure 4

Claims (1)

[Claims] A water heating unit that includes a pressurized water injection means such as a pump, a water passage that has a heater and whose injection port communicates with the pressurized water injection means via a pipe, and a substance to be extracted that communicates with the spout of the water passage. 2. An electric water boiling device comprising: a storage portion of the water boiling unit, and a check valve device provided at an inlet of the water heating unit to allow passage of only one water from a pressurized water injection means.