JPH0736595Y2 - Electric hot water storage container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an electric hot water storage container capable of boiling water.

(Prior Art) This kind of electric hot water storage container is widely used to store hot water for beverage such as making coffee or tea.

By the way, the electric hot water storage container stores tap water in most cases, keeps it warm at a predetermined temperature after boiling it, and if necessary, either keep it in that warm state or re-boil it before pouring it for use. There is.

(Problems to be solved by the invention) The first boiling or re-boiling not only adapts the liquid temperature to the intended use, but also helps sterilization and odor emission. However, a large amount of chlorine compounds contained in tap water, particularly toxic substances such as trihalomethane, still remain, and it is desired to sufficiently remove them. It may be possible to achieve this by continuing to boil the content liquid, but this process requires time and power consumption increases accordingly. For this reason, some users want to remove toxic substances sufficiently, and some want to remove toxic substances but do not want to spend too much time. Therefore, it is necessary to provide the product with various boiling operation durations set. It is easy to do this by a control circuit that employs a microcomputer, but the control system becomes complicated and expensive.

An object of the present invention is to provide an electric hot water storage container capable of achieving removal of harmful substances as needed in response to the above-mentioned demands with a simple configuration and control.

(Means for Solving the Problem) In order to achieve the above-mentioned problem, the boiling is detected by the temperature of the steam passing through the steam removal passage, which faces the steam removal passage through which the steam from the inner solution escapes to the outside. It is provided in a position that is not affected by the steam sensor and the steam sensor that switches the circuit from the open and boiling state to the heat retention state.
A thermal timer provided in parallel with the steam sensor,
It is characterized in that a changeover switch is provided which is connected in series with the thermal timer and which connects the thermal timer to the steam sensor in parallel or releases the connection.

(Operation) According to the present invention, the steam sensor is conventionally opened when boiling is detected by the steam temperature, and the circuit is switched from the boiling state to the heat retaining state. A thermal timer is connected in parallel to the steam sensor by a changeover switch. Then, the thermal timer, which was short-circuited by the steam sensor being closed until then, starts to operate, keeping the closed state for the set time without being affected by the heat of the steam or heater, Instead of the sensor, the circuit is kept in the boiling state, and when the set time elapses, it opens and switches the circuit to the heat retention state, so it is possible to keep boiling for the set time and perform sufficient descaling. You can
Since the connection by the change-over switch is released, it is possible to prevent such boiling from continuing.

In short, in addition to the conventional steam sensor, the thermal timer 1
Just add one and connect it to the steam sensor in parallel with the changeover switch or disconnect this connection,
It is possible to freely select whether or not to remove the chlorine by keeping the boiling.

(Embodiment) A first embodiment of the present invention shown in FIGS. 1 to 4 will be described.

In this embodiment, as shown in FIG. 1, the heater 1 is attached to the bottom surface of the bottom of the inner container 2, and the heater driving circuit shown in FIG.
Through 34, energization is controlled between a boiling state and a heat-retaining state so that the content liquid can be heated at a proper time and in a boiling state or a suitable temperature to keep it warm. Reference numeral 35 is a thermostat for heating water which is attached to the lower surface of the bottom of the inner container 2 through a through hole in the center of the heater 1 in the shape of a doughnut, and 38 is a temperature fuse, which forms a part of the control circuit 34 and forms the bottom of the inner container 2 with the heater 1. It is provided around.

The inner container 2 is housed and held in the outer case 3 to form a body 4, and the main wiring of the control circuit 34 and devices are bottom members of the body 4.
The terminal 43 is arranged in the control box 42 integrally formed with the terminal 41. Reference numeral 44 denotes a rotary seat body that rotatably receives the body 4.

The mouth 2a of the inner container 2 is connected to the upper end of the outer case 3 by a shoulder member 5 made of synthetic resin, and an outer lid 7 is pivotally attached to a bearing 9 at the rear of the shoulder member 5 by a shaft 6 so as to be openable, closable and detachable. There is. An inner lid 8 provided on the opening 2a of the inner container 2 is attached to the lower surface of the outer lid 7, and is opened and closed integrally with the outer lid 7.

Inside the outer lid 7, a bellows pump 11 which is pushed by an upper surface pressing plate 10 of the outer lid 7 is provided, and the inner container 2 is provided through an air supply passage 13 provided between the inner lid 8 and the bellows pump bottom plate 12. Pressurized air is sent inside to pressurize the content liquid. An outer lid 7 is provided in the air supply passage 13 through a branch hole 14.
Is provided with a steam vent passage 15 that escapes to the upper surface of the inner container 2 so that steam generated during heat retention by the heater 1 and boiling can be released to the outside to prevent abnormal pressure rise in the inner container 2.

A lead-out path 17 for guiding the pressurized content liquid to the upper outside of the inner container 2 is provided by connecting the base end to the bottom of the inner container 2 so that the content liquid in the inner container 2 always flows in and is the same. Keeping the level. A synthetic resin elbow 16 is connected to the upper end of the lead-out path 17. The elbow 16 is connected to an inverted U-shaped tube 18 fixed to the back side of the beak-shaped portion 5a of the shoulder member 5 which extends to one side like a beak. The inverted U-shaped tube 18 has a built-in water shutoff valve 36 at the time of fall just above the connection with the elbow 16, and the tip of the inverted U-shaped tube 18 is a downward discharge port 19.

A pipe cover 20 surrounding the beak-shaped portion 5a is provided under the beak-shaped portion 5a of the body 4, and is fitted to the beak-shaped portion 5a and the outer case 3 of the body 4. A liquid injection guide tube 21 is detachably attached to the bottom of the pipe cover 20 from below.

The rising portion of the lead-out path 17 is composed of a transparent tube 22 so that the liquid amount can be displayed by allowing it to be seen through the transparent window 24 of the resin panel 23 fitted from the upper end of the exterior case 3 to the front portion.

At the rear part of the shoulder member 5, two kinds of steam sensors 30 for detecting the end of boiling of the content liquid by the steam temperature and turning off are provided, and face the steam vent passage 15. The steam sensor 30 detects the initial steam temperature in a normal boiling state and terminates the boiling, and is connected to the control circuit 34 shown in FIG.

On the other hand, a thermal timer 45 is provided which is connected to the control circuit 34 and selectively used by turning on the switch 29 for mode switching. The thermal timer 45 is connected in parallel with the steam sensor 30, and is set to be short-circuited until the steam sensor 30 is turned off due to boiling of the content liquid. After continuing for a period of time, the content liquid is aggressively descaled and then turned off to end the boiling.

For example, the thermal timer 45 is provided in the control box 42 that is not affected by the temperature from the other, the temperature sensor 46 is heated by the timer heater 47, and after a predetermined time, the temperature sensor
Each specification is set so that 46 turns off. It is convenient to set the predetermined time by selecting the capacity of the timer heater 47 rather than selecting the characteristic of the temperature sensor 46, and various set times corresponding to various requests can be easily obtained at the manufacturing stage.

An operation panel 25 shown in FIG. 2 is provided on the front surface of the pipe cover 20. On the operation panel 25, in addition to the boiling and heat-retaining display lamps 26 and 27 and the reboil key 28, the switch for switching the normal boiling or descaling mode.
29 are provided.

The heater 1 is divided into a warming heater 1a and a boiling water heater 1b, which are connected to a control circuit 34 shown in FIG.

In this control circuit 34, 37 is a relay having a self-holding contact 37a for keeping the circuit 34 in a boiling state,
Is turned on, or any one of the reboil key 28 and the boiling water thermostat 35 which turns on the content liquid at less than 80 ° C. is operated to close the contact 37a. As a result, the circuit 34 is brought into a boiling state in which the heater 1b is turned on in addition to the warming heater 1a. After that, the reboil switch 28 is turned off immediately, and the thermostat 38 is also boiled when the content liquid reaches 80 ° C. and is turned off during the process.
However, the relay 37 is in the operating state and keeps the boiling state until it is released by turning off the sensors 30 and 46 to which the self-holding by the contact 37a is connected. Connected sensor
When both 30 and 46 turn off, the relay 37 turns off,
Since the contact 37a is turned off, the water is boiled and the heater 1b is turned off to return to the heat retention state.

Therefore, when the switch 29 is off, the sensor 46 is originally turned off, the sensor 30 is turned off at the steam temperature in the initial stage of normal boiling, and the boiling water state is released. Therefore, the normal boiling is switched to the heat retention state.

Further, when the switch 29 is turned on and the sensor 46 is in the ON state together with the sensor 30, since the sensor 30 is kept ON until the normal boiling is reached, the thermal heater 45, particularly the timer heater 47, is short-circuited and does not generate heat. Therefore, as the thermal timer 45, the sensor 46 is not heated, so that the thermal timer 45 is placed in an inoperative state.

Normally, when the sensor 30 is turned off due to boiling, the timer heater
Energization to 47 is sufficient and heat generation at the set capacity starts,
The sensor 46 is heated. Due to this heating, the sensor 46 is turned off after a lapse of a predetermined time to release the boiling state. Therefore, after the normal boiling, the boiling is continued for a predetermined time and then switched to the heat retaining state. Then, the descaling operation is performed while boiling continues.

The temperature change of the content liquid in this case is shown in FIG. FIG. 4 (a) shows the case where normal boiling is set by the switch 29, and FIG. 4 (b) shows the changeover switch 29.
Shows the case of setting to remove scaly. When it is set on the descaling side, even if the content liquid reaches the boiling point, the boiling is continued for a predetermined time, and during that time, the emission of chlorine compounds and the like in the content liquid can be promoted. Exhibits so-called descaling effect.

In short, in the present embodiment, the steam sensor 30 is opened as in the conventional case when boiling is detected by the steam temperature, and the circuit is switched from the boiling state to the heat retention state.However, the thermal timer 45 is connected to the steam sensor 30 in parallel by the changeover switch 29. If so, the thermal timer 45, which was short-circuited due to the steam sensor 30 being closed until then, starts operating, and is kept closed for the set time without being affected by the steam or the heat of the heater 1. Instead of the steam sensor 30, hold the circuit in the boiling state and open it when the set time elapses to switch the circuit to the heat retention state, so that boiling can be maintained for the set time and sufficient descaling can be performed. It is possible to prevent the continuation of boiling like this by disconnecting the connection by the changeover switch 29. Wear.

In short, in addition to the conventional steam sensor 30, a thermal timer is used with a hardware circuit that does not use a microcomputer.
It is possible to freely select whether or not to remove the scaly water by keeping boiling by simply adding 451, and connecting the steam sensor 30 in parallel to the steam sensor 30 by using a changeover switch or disconnecting the connection.

FIG. 5 shows a second embodiment of the present invention, which is a thermal timer.
45 is provided with a variable resistor 51 for adjusting the set time. The variable resistor 51 is connected in series with the timer heater 47, and adjusts the amount of electricity supplied to the timer heater 47. This allows the timer heater
The amount of heat generated by the sensor 47 changes, and the time until the sensor 46 senses a predetermined temperature and turns off is changed. That is, the set time of the thermal timer 45 can be freely adjusted by changing the resistance value of the variable resistor 51.

The variable resistor 51 may be provided in an appropriate place inside the body 4 to be used for the manufacturing process or the operation of a service person, or may be provided in an appropriate place outside the body 4 to be operated by the user. .

(Effect of the device) As in the past, the steam sensor is opened when boiling is detected by the steam temperature, and the circuit is switched from the boiling state to the heat retaining state. However, if a thermal timer is connected in parallel with this steam sensor by a changeover switch. , The thermal timer, which was short-circuited until then until the steam sensor was closed, starts to operate, and keeps the closed state for a set time without being affected by the heat of steam or the heater, instead of the steam sensor. The circuit is kept in the boiling state, and when the set time has elapsed, the circuit is opened to switch the circuit to the heat retaining state, so that boiling can be maintained for the set time and sufficient descaling can be performed. Since the connection by the changeover switch is released, it is possible to prevent such continuous boiling.

In short, in addition to the conventional steam sensor, the thermal timer 1
Just add one and connect it to the steam sensor in parallel with the changeover switch or disconnect this connection,
It is possible to freely select whether or not to remove the chlorine by keeping the boiling.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a first embodiment of the present invention, and FIG.
FIG. 3 is a control circuit diagram, FIG. 4 is a graph showing temperature changes of the content liquid in the case of normal boiling and in the case of removing scaly water,
FIG. 5 is a circuit diagram of a main part of a control circuit showing a second embodiment of the present invention. 1a …… Boiler heater 2a …… Heat heater 28 …… Reboil key 29 …… Switch 30,46 …… Sensor 34 …… Control circuit 35 …… Boiler thermostat 45 …… Thermal timer 47 …… Timer heater 51 …… Variable resistance

Claims (1)

[Scope of utility model registration request] 1. A steam sensor, which faces a vapor vent passage for letting vapor from the internal solution escape to the outside, detects boiling based on the temperature of the vapor passing through the vapor vent passage, and switches the circuit from a boiling state to a heat retaining state. A thermal timer provided in a position not affected by the heat of the steam and the heater and provided in parallel with the steam sensor, and a thermal timer connected in series with the thermal timer and connected in parallel with the steam sensor An electric hot water storage container provided with a changeover switch.