JPH07213441A - Electrically driven hot water supplying electric hot water storing container - Google Patents

Abstract

PURPOSE:To surely provide the given amount of hot water supply in a wide range up to a great amount of hot water supply, let plurality of switching functions be provided for a switch though the switch itself is a single one, and thereby control pump revolution in accordance with the combination of various outputs of switching functions. CONSTITUTION:In the electrical hot water storing container, fluid contained is heated by a water heater so as to be boiled, and a proper amount of hot water is poured out of its mouth as required with a hot water supply pump driven. The amount of hot water poured (the amount of hot water supply per unit time) is set by a delivery amount variable switch 17. The delivery amount various switch 17 is provided with for example, three switching functions represented by selection switches S1 through S3 corresponding to a small amount, an intermediate amount and a great amount respectively, it comprises a disc shaped-dial 17B acting as a rotation operation member coaxially faced to a disc shaped-switch base board 17A, three sets of conductive print patterns 21 through 23 which are different in position in the radial direction are printed on the surface of the switch base board 17A, and they are connected to a microcomputer control unit via a first resistor through a third resistor respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hot water supply type electric hot water storage container for pouring hot water stored in an inner container to the outside through an electric hot water supply pump.

[0002]

2. Description of the Related Art Conventionally, in the electric hot water storage type electric hot water storage container as described above, for example, when hot water is supplied to a large-capacity hot water supply container (for example, a pot) and small-capacity hot water supply container (for example, a coffee cup). It is possible to selectively use the amount of hot water supplied per unit time depending on whether the hot water is supplied to
As a means for this, the hot water of the electric hot water supply pump is changed by changing the driving speed of the electric hot water supply pump by changing the connection state of the input contact according to the pressing force of the multi-contact changeover type pressing operation switch provided on the upper part of the housing of the electric hot water storage container. A configuration in which the discharge amount is adjusted is adopted (see, for example, Japanese Patent Publication No. 4-22089).

[0003]

However, in the case of the electric hot water supply amount adjusting device for the electric hot water supply type electric hot water storage container represented by the above-mentioned known example, the magnitude of the pressing force of the user with respect to the pressing operation switch operating portion is as described above. Since the discharge amount of the electric hot water supply pump is adjusted accordingly, there is a problem that the discharge amount increases or decreases due to a slight force adjustment. Therefore, when hot water is supplied with a large discharge amount unexpectedly against the user's intention, hot water may sometimes spatter around.

Under these circumstances, the user wants to obtain a large hot water supply amount per unit time, a small hot water supply amount, and an intermediate hot water supply amount. Originally, there is a high demand for reliable hot water supply by independent switch operating parts.

However, providing a plurality of switches of the same kind having independent operating parts causes an increase in the cost of the product and causes a space factor on the operation panel surface and a restriction on design.

The present invention has been made in view of the above circumstances, and has a plurality of independent switch functions even though the operation section is single and the appearance and the parts are single. An object of the present invention is to provide an electric hot water storage type electric hot water storage container that can reliably obtain a wide range of desired hot water supply amounts from a large hot water supply amount to a small hot water supply amount by combining these switch outputs. .

[0007]

The present invention is provided with the following effective problem solving means, for example, in order to surely solve the above-mentioned problems in the prior art and to achieve the object appropriately. Has been done.

That is, an inner container housed in a predetermined outer casing, an electric hot water pump for supplying hot water in the inner casing to the outside through a pouring path, and an external operation at a predetermined position of the outer casing. In the electric hot water supply type electric hot water storage container, which comprises a discharge amount variable switch provided in, and pump drive means for driving the electric hot water supply pump in accordance with an operating state of the discharge amount variable switch, the discharge amount variable switch is , A dial having a plurality of power supply terminals on the back surface and rotatable by an external operation, and a rotation angle position provided on the opposite surface of the dial opposite to the back surface part of the dial and sequentially different from the plurality of power supply terminals of the dial. And a switch board having a plurality of power input terminals that are in contact with each other, and the plurality of power terminals and the power input terminals are sequentially contacted in accordance with the rotation operation angle of the dial. Occupied it passed, and so the discharge amount is adjusted by controlling the pump driving means on the basis of the combination of the conductive output.

The plurality of power supply input terminals are formed by a plurality of semicircular print patterns having different radial positions and contact positions with the power supply terminals in the rotation angle direction. A springback structure is adopted that returns when the operating force in the rotation direction stops acting.

[0010]

Therefore, in the electric hot water supply type electric hot water storage container according to the present invention, a plurality of discharge amount selecting terminals which are turned on in accordance with the dial rotation angle are provided between the dial side power supply terminal and the switch base side power supply input terminals. When the dial of the discharge amount variable switch is rotated in a predetermined direction such as the right direction, a plurality of switch units for selecting the discharge amount are sequentially operated according to the expansion of the rotary operation angle of the dial. The ON state of each of these switches and the OF.
The selected state of the discharge amount is determined by the combination of the outputs in the F state, and the pump drive means is controlled based on the determination result to appropriately change the discharge amount.

In this case, the plurality of power supply input terminals on the switch board side are formed by a plurality of semicircular print patterns having different radial positions and contact positions with the power supply terminals in the rotation angle direction. When formed, the thickness of the switch base itself can be reduced, and the entire discharge amount variable switch can be thinned. Further, by arbitrarily changing the number and form of the power supply terminals and the print patterns, various ejection amount varying methods can be realized.

Further, if the dial has a springback structure which returns to the reset position after the operation, it is not necessary to reversely rotate it each time the operation is performed, and it is only necessary to always perform a rotation operation in one direction to be selected. It will be enough.

[0013]

As a result, according to the electric hot water supply type electric hot water storage container of the present invention, it is possible to precisely adjust and set the discharge amount in a plurality of steps only by rotating the dial which is a single operating portion. Multiple switch functions can be realized with a single switch component, so the cost is low, and there are no design restrictions due to the space factor of the installation surface.

Further, by simply changing the number and form of the dial side power supply terminal and the switch board side print pattern,
It is possible to realize various forms of variable discharge amount, and it is possible to adjust the discharge amount over a wide range.

Further, by adopting the print pattern structure for the power input terminal, it is possible to provide a discharge amount variable switch having an extremely thin thickness, which is easy to install in the housing and is advantageous in terms of design and cost. Will also be cheaper.

[0016]

1 and 2 show the entire structure of an electric hot water storage container equipped with an electric hot water supply pump according to an embodiment of the present invention and an operation panel section, and FIGS. 3 to 5 show the discharge thereof. The structure of the variable volume switch is shown, and FIGS. 6 and 7 show the control circuit and discharge volume variable characteristic of the same container, respectively.

This electric hot water storage container comprises, for example, as shown in FIG. 1, a container body 1 and a lid body 2 which is rotatably supported on the upper portion of the container body 1.

The container body 1 is provided with a cylindrical sheet metal outer case 3 forming an outer peripheral surface and a stainless steel inner container 4 forming an inner peripheral surface, and the bottom surface of the outer case 3 is
It is covered by a synthetic resin bottom member 5 having a cylindrical shape with a bottom.

An upwardly convex disk portion 4a is formed in the central portion of the bottom surface of the inner container 4, and the lower surface of the disk portion 4a heats the liquid content contained in the inner container 4. A boiling water heater 6A is additionally provided. Further, a temperature sensor 11 having a heat-sensitive portion 11a in contact with the lower surface of the central portion of the bottom surface of the inner container 4 is provided on the central rear surface of the bottom portion which bulges slightly above the inner container 4.

Further, at a position near the periphery of the bottom surface of the inner container 4 (that is, near the outer peripheral portion of the disk portion 4a),
The inlet portion 7a of the liquid pouring passage 7 for pouring the content liquid (hot water) to the outside is opened. The outlet portion 7b of the liquid outlet passage 7 is connected to a outlet portion 8 provided on one side of the upper portion of the container body 1 via a water level sensor (not shown).

Then, in the upstream portion of the liquid pouring passage 7,
Further, an electric hot water supply pump P for pumping water is provided, and the discharge amount of the electric hot water supply pump P of the motor unit according to the operating state of the discharge amount variable switch 17 shown in FIGS. It is designed to be controlled in three stages of small, medium and large by controlling the field voltage. The field voltage control of the motor section is performed by controlling the pump drive circuit 27 shown in FIG. 6 via the microcomputer control unit 30. Further, reference numeral 9 is an electric circuit storage box provided with a control circuit as shown in FIG. 6, and 10 is a heat shield plate.

That is, in the electric hot water storage container according to the present embodiment, after the content liquid contained in the inner container 4 is boiled and heated by the heater 6A to be boiled, a heat retaining heater (not shown in FIG. 1) (see FIG. 6A), the content liquid (that is, hot water) W is passed through the liquid pouring passage 7 by the electric hot water supply pump P by operating the electric hot water supply pump P as necessary. Outlet section 8
Is automatically poured from the outside. The discharge amount (hot water supply amount per unit time) at the time of pouring is set by a discharge amount variable switch 17 described later.

On the other hand, on the upper surface of the front end portion 2a of the lid body 2,
For example, an operation panel 12 including an operation state display unit 13 and an operation switch unit 15 as shown in FIG. 2 is provided.

The operating state display portion 13 of the operation panel 12
Is a display element (light emitting diode) for displaying three operating states such as boiling, descaling, and heat retention and a locked state.
3a, 13b, 13c, 16 and operation switch 15
The parts are reboil switch 15a and lock release switch 1
5b, the discharge amount variable switch 17 is composed of three switches. The discharge amount variable switch 17 is formed by a rotary dial switch adopting a springback structure as will be described below. For example, as shown in FIG. 6, a small amount selection No1 switch S ₁ and a medium amount selection No2 switch S _{2 are provided.} has three switch function of mass selection No3 switch S _3.

That is, the same variable discharge amount switch 17
For example, as shown in detail in FIG. 3, a rotary dial adopting a springback structure in which three sets of switch contact portions are formed by coaxially opposing a disc-shaped switch base 17A and a disc-shaped dial 17B as a rotary operation member. It is composed of switches.

First, on the surface of the switch board 17A, for example, as shown in FIG.
The conductive print patterns 21 to 23 having different positions in the radial direction of the third set are printed. The print patterns 21 to 23 are made of copper foil, for example, and are formed in a semicircle shape corresponding to a rotation angle of 180 ° in the circumferential direction. The angles θ ₁ , θ ₂ , θ ₃ are small diameter portions 21a, 22a, 23a.
On the other hand, the rotation angle portion larger than that is the large diameter portion 21b, 2
2b and 23b, respectively.

The first, second, and third print patterns 21, 22, and 23 are controlled by a microcomputer, which will be described later, via the first, second, and third resistors R ₁ , R ₂ , and R ₃ , respectively. It is connected to the input terminal of the unit 30 (see FIG. 6).

On the other hand, in the dial 17B, the rotary support shaft 18 provided on the back surface of the central portion of the dial 17B is provided with the switch base 17.
A central portion of A is loosely fitted and penetrated, and is supported on the bearing portion 19 on the operation panel 12 side so as to be rotatable in the left-right direction. Then, as shown in FIG. 3 and FIG. 5, a brush-shaped brush serving as a power supply terminal is provided on the outer peripheral portion of the rear surface side rotation shaft corresponding to the first to third print patterns 21, 22 and 23 on the dial 17B side. The first to third conductive sliding contacts 24a, 25a, and 26a (or pins) may be arranged in a line on the same straight line in the radial direction. The first to third sliding contacts 24a, 25a, 26a are commonly connected to each other and connected to a power source (+ B = 5V) terminal in a common state.

In this way, the first print pattern 21 and the first sliding contact 24a form the small quantity selection No1 switch S ₁ shown in FIG. 6, and the second print pattern 22.
And the second sliding contact 25a is the medium quantity selection No2 switch S ₂ shown in FIG.
The sliding contact 26a of No. 3 is the mass selection No3 switch S _{3 of FIG.}
Are configured respectively. Then, these small amount, a medium amount, mass each discharge rate selection of No1, No2, No3 switches S _1, S _2, S _3, as shown in FIG. 7, the first to third sliding contact 24a of , 25a, each OFF (discharge amount zero) rightward rotation angle theta of the dial 17B having a 26a is in Shitao～shita ₁ before the position of FIG. 4, a small amount selection No1 is then theta ₁ through? ₂ nearby position only the switch S ₁ is ON (discharge amount is small), and theta ₂ through? ₃ small amount selected in the front position No1 switches S _1, medium heavy selected No2 switch S ₂ are both ON (in ejection amount), further theta ₃ through? _{At the 4th} position, the small amount selection No1 switch S ₁ , the medium amount selection No2 switch S ₂ and the large amount selection switch S ₃ are all turned on (large discharge amount).

Then, the combination of ON and OFF states of the switches S ₁ , S ₂ and S ₃ of the No 1, No 2 and No ₃ is inputted through the _first to third resistors R ₁ , R ₂ and R _3. Based on the combination of changes in the input voltage (+ 5V) corresponding to them, the microcomputer control unit 30 to be described later determines the discharge amount selection setting state as shown in FIG. The discharge amount of the electric hot water supply pump P is made variable by controlling the pump drive circuit 27 of P shown in FIG. 6 to change the rotation speed of the pump motor.

Next, the overall construction of the electric circuit of the electric hot water storage container of the present embodiment having the discharge amount varying function of the electric hot water supply pump shown in FIG. 6 will be described.

In the figure, reference numeral 6A is the above-mentioned water heater, and 6B.
Is a heat-retaining heater not shown in the above, and is connected to the water heater 6A via the relay switch RS and to the heat-retaining heater 6B via the triac 32.
The AC power input is supplied from 1.

The relay switch RS is a relay drive circuit 3
ON, O by relay coil RL excited by 6
The FF is controlled to control the energization state of the boiling water heater 6A, while the triac 32 has its firing angle controlled by the triac drive circuit 35 to arbitrarily control the amount of electric power supplied to the heat retaining heater 6B. Has become.

Further, reference numeral 30 is the above-mentioned microcomputer control unit, and the water temperature data TW of the temperature sensor 38 detected through the heat sensitive portion 38a and the reboil switch 1
5a, lock release switch 15b, discharge amount selection switch 1
Operation signal (ON, OFF signal) of each operation switch such as 7
To determine the water supply state, the water supply temperature, the boiling water or heat retention function, the set discharge amount, etc., and depending on the determination result, the relay drive circuit 36 or the triac drive circuit 35,
The pump drive circuit 27 is arbitrarily operated to perform the corresponding control, and the display elements 13a to 13c and 16 are driven to display the necessary operating state.

Reference numeral 27 denotes the above-mentioned pump drive circuit, which controls the field voltage applied to the drive motor of the electric hot water supply pump P as described above in accordance with the combination of the outputs of the discharge amount variable switch 17 and the microcomputer control unit. By controlling according to the discharge amount control signal supplied from 30, the pump rotation speed is varied to adjust the hot water supply amount.

Further, reference numeral 37 is a frequency synchronizing signal input circuit for detecting the power supply frequency (50/60 Hz) of the AC power supply and inputting it to the microcomputer control unit 30.
The microcomputer control unit 30 inputs the frequency synchronization signal and the detection signal of the temperature sensor 38 in synchronization with each other,
The amount of water is determined, and the heating time of the water heater 6A corresponding to the amount of water is controlled. The same frequency synchronization signal is also used as a reference signal for timer counting. In addition, F ₁ , F ₂
Is a fuse.

[Brief description of drawings]

FIG. 1 is a sectional view showing the configuration of an electric hot water container according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view of an operation panel portion of the electric hot water storage container.

FIG. 3 is an enlarged sectional view showing a structure of a discharge amount variable switch section of the electric hot water storage container.

FIG. 4 is an enlarged plan view of constituent members of the discharge amount variable switch of FIG.

5 is a partially cutaway perspective view showing a configuration of a main part of the discharge amount variable switch of FIG.

FIG. 6 is a system block diagram showing a configuration of a control circuit unit of the electric hot water storage container.

FIG. 7 is a time chart showing changes in the amount of hot water discharged by the discharge amount variable switch of the electric hot water storage container.

[Explanation of symbols]

6A is a boiling water heater, 12 is an operation panel, 13a is a boiling display element, 13b is a descaling display element, 13c is a heat retention display element, 15a is a reboil switch, 17 is a discharge variable switch, 17A is a switch board, 17B Is a dial, 21 is a first print pattern, 22 is a second print pattern, 23 is a third print pattern, and 24a
Is a first sliding contact, 25a is a second sliding contact, 26a is a third sliding contact, 27 is a pump drive circuit, 30 is a microcomputer control unit, 31 is an AC power supply, 32 is a triac,
38 is a temperature sensor, and P is an electric hot water supply pump.

Claims (3)

[Claims] 1. An inner container housed in a predetermined outer casing, an electric hot water pump for supplying hot water in the inner casing to the outside through a pouring path, and an external operation at a predetermined position of the outer casing. In the electric hot water supply type electric hot water storage container, which comprises a discharge amount variable switch provided in, and pump drive means for driving the electric hot water supply pump in accordance with an operating state of the discharge amount variable switch, the discharge amount variable switch is A dial which is provided with a plurality of power supply terminals on the back surface thereof and which can be rotated by an external operation, and which is provided so as to face the back surface portion of the dial,
And a switch base having a plurality of power input terminals that sequentially come into contact with the plurality of power terminals of the dial at different rotation angle positions on its opposite surface, and the plurality of power terminals according to the rotation operation angle of the dial. An electric hot water supply type electric hot water storage container is characterized in that the power input terminals are sequentially brought into contact and conducted, and the discharge amount is adjusted by controlling the pump driving means based on the combination of the conduction outputs. . 2. The plurality of power input terminals are formed of a plurality of semicircular print patterns each having a different radial position and a different contact position with the power terminal in the rotation angle direction. The electric hot water supply type electric hot water storage container described. 3. The electric hot water supply type electric hot water storage container according to claim 1 or 2, wherein the dial has a springback structure which returns when the operating force in the rotating direction is no longer applied.