JPS6226037A - Electric pot - 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] Industrial applications The present invention heats hot water in a container and brings it to a boil.

This invention relates to an electric water heater (hereinafter referred to as a water heater) with a boiling type vacuum container such as a jar pot for keeping warm.

BACKGROUND OF THE INVENTION Generally, in order to bring out the taste and aroma of tea, coffee, black tea, etc., it is necessary to remove the unique taste caused by limescale etc. of tap water. In addition, boiling tap water is widely known as a means of removing such a characteristic taste, and it is also known that the chlorine odor cannot be completely removed unless boiling continues for a long time. This is because the limescale odor components become gaseous when boiled and are released into the atmosphere together with steam, and it is also known that the higher the water temperature, the smaller the amount that can exist in the water. Furthermore, instant foods such as cup ramen cannot be cooked deliciously unless they are boiled with water of at least 98°C. Even electric water heaters such as jar pots can bring water to a boil. What is desired is a so-called boiling type, which can continuously maintain a temperature close to the boiling temperature after boiling. Currently, the boiling type has been proposed in 9 For example, Japanese Patent Publication No. 57-805, but what about after boiling? It keeps hot water at a temperature of about 0°C to 95°C.

Problems that the invention aims to solve: Conventional products have low heat retention effectiveness for hot water and water containers.
The amount of heat dissipated varies greatly in response to changes in ambient temperature.9 For example, when the ambient temperature is 0°C, if you add heating power to maintain the water temperature at 100°C, 1 When the ambient temperature becomes high (30°C), the remaining power There are disadvantages that a large amount of steam is generated and the hot water and water flow quickly, and that the continuous generation of steam causes deterioration of plastic materials, etc. Furthermore, because the temperature of the hot water is controlled by a temperature sensor, there is a drawback that the hot water cannot be kept warm at a temperature close to boiling temperature.

Means for Solving the Problems The present invention has been made to eliminate the above-mentioned drawbacks.
The hot water in the vacuum container is equipped with a means for heating the water, and a heat-sensitive element that detects boiling of the heated water and water, and the heating means is controlled by the heat-sensitive element to heat the hot water.

Equipped with a heating switching means that switches the water from a heating boiling state to a heating and keeping warm state, and furthermore, by reducing the amount of heating heat during heating and keeping warm to less than the boiling maintenance heat, it completely removes chlorine odor and provides hot water close to the boiling temperature at any time. There is a way to get a water heater that can be used.

By doing this, the hot water is maintained at a temperature close to the boiling temperature within the ambient temperature range in which the water heater is used during heat retention.

Example An embodiment of the present invention will be described below with reference to the drawings.

First, in the electrical circuit diagram in Figure 1, 1 is an AC power supply, 2
3 is a heating means consisting of a sheathed heater (hereinafter referred to as the main heater), and 3 is a heating means (hereinafter referred to as a heat retention heater)
It is made of mica, etc., and the amount of heating heat during heating and keeping warm is less than the amount of boiling heat. Reference numeral 4 denotes a heat-sensitive element consisting of a heat-sensitive switch for sensing boiling, which turns on the TBS or the like at room temperature and turns it off when it senses the steam temperature. 5 is a relay coil, and 6 is a switch that is turned on when the relay coil 5 is energized and turned OFF when it is not energized. 7 is a heat-sensitive switch that detects the water temperature and controls the power supply to the main heater 2. For example, it turns off when it is above 90℃ and turns on when it is below 90℃, and when water is added, Or it turns on when the power is restored after a power outage. Reference numeral 8 is a safety thermostat, which operates during dry firing or when a small amount of water is present. 9
is a temperature fuse, and 10 is a switch, which is always OFF.
, It turns ON only when pressed manually. Also, heat sensitive element 4. The relay coil 5 and the switch 6 constitute a heating switching means 45 consisting of a self-holding circuit.

Next, in FIG. 6, FIG. 4, and FIG.
The outer container 102 constitutes a vacuum section 103.

Further, the lower part of the vacuum container 100 is a communication member 106 that has a convex portion 104 formed at the center of the bottom of the inner container 101 and has a threaded portion 105, which connects the communication port 1 between the inner container 101 and the outer container 102.
07, and this configuration provides a heat insulating structure that prevents heat dissipation. or.

A mouth portion 108 is formed at the top of the vacuum container 100.

The heater assembly 200 inserted from the mouth 108 into the vacuum container 100 is inserted into the threaded part 105 through the gasket 300.
It is installed watertightly by screwing. Heater assembly 2
00 is a bottomed cylindrical upper member 20 made of stainless steel plate etc.
1, and a threaded portion 202. A stainless steel lower member 206 having a hole 2069, a stepped portion 204, and a cylindrical portion 205 are watertightly joined together at a joint portion 207 by welding or the like. Both end portions 209 of the main heater 2 are watertightly joined to the lower member 206 at a joint portion 210 by welding or the like.

The heat generating part of the raw heater 2 is located at the bottom of the lower member 206.

Both end portions 209 and the space portion 21 of the heater assembly 200
It is arranged so that it is located within 1. Further, a water pipe 212 made of a stainless steel pipe is watertightly connected to the center of the upper member 201 at a joint 213, and communicates with the inside and outside of the inner container 101 through a communication part 214. A heat-retaining heater filter is fixed to the space 211 side of the upper member 201 by a presser plate 215, and thermally contacts the stepped portion 204 of the lower member 206, so that the heat-sensitive switch 7 and the safety thermostat 8 have a spring property. It is attached with a mounting plate 216 that has. The safety thermostat 8 is attached near both ends 209 of the main heater 20, and is arranged so as to sensitively catch the temperature rise of the main heater 2 during dry firing. A plug body 3 [51 is attached to the mouth part 108 via a gasket 302, so that hot water will flow out when the body filter 04 is tipped over.

A known valve element 303 is provided to prevent water from flowing out and normally allow steam and pressurized air to pass through, and also communicates the steam outlet 305 with the hole 306. Further, the hole 307 is usually made of silicone rubber or the like and the valve body 30B and the spring 309 are connected to each other.
When the push rod 510 is pressed down, the hole 307 and the hole 606 communicate with each other, and at the same time the hole 306
The structure is such that the steam outlet 305 is closed. The lid 611 has a bellows 312. A push plate 316 is arranged, and the bellows 612 has a hole 314 at the top. Consisting of a spring 315 and a support member 616 that is expandable and retractable and maintains a constant height, the spring 615 applies downward pressure to the push rod 310, and the support member 31B positions the push rod at a fixed position to push the valve body 308. This is to maintain a gap between the two countries. The gasket 317 is integrally attached to the lid 611 and maintains airtightness with the stopper 301. Lid 611
is opened and closed by a fulcrum roller 18. Steam outlet 3
05, a heat sensitive element 4 is provided, and this heat sensitive element 4 is operated by jetting out steam. 322 is a hot water outlet, which is connected to the gauge filter 20. The water W in the container 100 is removed by a drain pipe filter 19 made of silicone rubber or the like.
is connected to.

The operation of this embodiment having the above configuration will be explained.

Open the lid 11, remove the stopper filter 01, and pour water W into the container 100. Safety thermo8. Since the heat-sensitive switch 7 is in the ON state, the main heater 2 and the heat-retaining heater filter are energized to heat the water W. At this time, the heater 2 efficiently heats the water W because its heat generating portion is in contact with the water W. Since the heat sensitive element 4 is also turned on at the same time, the relay coil 5 is energized and the switch 6 is turned on. As shown in the hot water temperature characteristics shown in FIG. 2, when the temperature of water W reaches the operating temperature T of the heat-sensitive switch 7 11 hours after To, the heat-sensitive switch 7 is turned off, but when the switch O is turned on, the main heater 2 and Electricity continues to be applied to the heat retention heater B. After 12 hours, the water W reaches a boiling temperature of 100° C. and steam is generated. Steam is in the upper space W.

The steam eventually passes through the hole 606 and ejects forcefully from the steam outlet 305, heating the heat-sensitive element 4, which responds to the heat-sensitive element 4. When the heat-sensitive element 4 is turned OFF, the power to the relay coil 5 is cut off, and the switch 6 is turned OFF. The heating switching means 45 stops the power supply to the main heater 2, and thereafter the heat is kept warm by the heat-retaining heater 6. At this time, due to the high insulation properties of the vacuum container 100, the wattage required to maintain the temperature at 100°C with a capacity of 2.2t is 7.5W at a room temperature of 5°C, and the wattage of the insulation heater B is set to 7W. It should be set to a certain degree. Therefore, the temperature of the hot water is saturated at 96° C. by the heat retention heater B. Also, from boiling water temperature to 96℃
Since it takes about 20 hours for the temperature to drop to ,
During actual use, the water is always near boiling temperature. Furthermore, the limescale odor is released to the outside air together with the steam during boiling, and even if some of the limescale odor components remain in the upper space W, the temperature of the hot water W remains at about 10°C.
Since it is maintained at 0°C, it hardly exists in the hot water W, and completely removes limescale odor. Here, the heat-retaining heater 3 has a slightly lower wattage than the wattage required to maintain the boiling temperature, so no steam is generated during heat-retaining, and the heat-sensitive element 4
cools down and turns on, but the heat-sensitive switch 7 turns off.
Due to the current situation, main heater 2 is not energized and heating and heat retention is continued using only heat retention heater B. When discharging the hot water in the inner container 101, when the push plate 313 is pushed down, the hole 314 first closes and the push rod 310 that pushes down the bellows roller 12 descends and comes into contact with the valve body 308.

Since the spring 315 is set to be stronger than the spring 309, the spring filter 09 is lowered and the valve disc filter 0 is lowered.
8 is lowered, the steam outlet filter 05 is closed, the hole 307 is opened, and the air in the bellows filter 12 flows through the holes 3Q7. hole 306
The hot water in the container 100 is pressurized through the communication part 214 and the drain pipe filter 19. Gauge 320. Via the valve body 321 part.

Water is drained from the discharge port 322. When the push plate 316 is released, the valve element 308 returns to its initial state, and the valve element 308 closes the hole 307 and opens the steam outlet 305. In addition, if water is supplied on the way 2
For example, as shown in FIG. 2, when water is added at <t3, the temperature of the hot water drops to Ti4 by time t4, the heat-sensitive switch 7 is turned on, the heater 2 is energized and heated, and at this time the heat-sensitive element 4 is turned on. Since it is ON, the relay coil 5 is energized and the switch 6 is turned ON, returning to the above-mentioned initial state and continuing to keep warm after boiling. Also, in the event that the temperature of hot water falls between T and 100℃ due to a power outage, water supply, etc.

A switch 10 is provided for boiling, and even when the temperature-sensitive switch 7 is OFF, the switch 10 can be manually turned ON.
Then, since the heat-sensitive element 4 is turned on, electricity is applied to the heat-sensitive element 5, and the switch 6 is turned on.
After the boiling, heating is continued. Furthermore, since no steam is generated during dry firing, such as when electricity is applied without adding water W or when electricity is applied when the amount of hot water is small, no steam is generated.
Since the switch 6 is in the ON position, the main heater 2 remains energized, and the safety thermostat 8 is heated at both terminals 209. Direct conduction through the lower member 206 and radiant heat from the main heater 2 are sensed through the lower member 206. In addition, the safety thermometer 8 is located above the main heater 2 and senses the temperature rise of the lower member 206 through air convection and responds with high sensitivity.
There is no melting, etc., and safety is maintained. or.

When the water level is small and the water level is lower than the lower member 206, the heat generating part of the main heater 2 is underwater and there is no risk of red heat or the like to the main heater 2, and the temperature of both terminal parts 209 rises at the same time as the water level falls. The safety thermometer 8 senses and responds at this temperature.

Effects of the Invention (2) According to the present invention, after the hot water in the vacuum container is boiled by the heating means, the heating switching means via the heat-sensitive element stops energizing the heating means, and thereafter the amount of heating heat during heating and keeping warm is reduced. Since the heat value is set below the boiling temperature, the hot water is maintained at a high temperature to remove limescale odor.

It is possible to obtain a water heater that can provide hot water close to boiling temperature at any time.

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram of an electric water heater according to an embodiment of the present invention, and FIG. 2 is a temperature characteristic diagram related to the water temperature. Fig. 4 is a sectional view of the same side, and Fig. 4 is a sectional view of the same essential part. FIG. 5 is a perspective view of the same essential parts. 2.3... Heating means, 4... Heat sensitive element. 45... Heating switching means. 100...Vacuum container.

Claims (1)

[Claims] Heating means (2) for heating hot water or water in the vacuum container (100)
), a heat-sensitive element (4) that detects the boiling of hot water, and a heat-sensitive element (4) that controls the energization of the heating means (2) through the heat-sensitive element (4), and changes the hot water from a boiling state to a heat-retaining state. An electric water heater characterized in that the electric water heater is equipped with a heating switching means (45) for switching, and the amount of heating heat during heating and keeping warm is set to be less than the amount of boiling heat.