JP3191679B2 - Electric water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater that heats and keeps a stored liquid and discharges the liquid outside the container.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 62-161326 discloses a conventional electric water heater that detects boiling by steam generated during water heating to prevent erroneous detection due to steam generated during water heating. 13 to 14, that is, as shown in FIGS. 13 to 14, communicates with the opening 102 of the inner container 101 via the connecting pipe 103, and branches at the connecting pipe 103.
A steam discharge passage 104 and a steam storage chamber 105 are arranged, and a hollow projection 106 is formed in the steam storage chamber 105 so as to protrude inward, and a boiling detector 107 is disposed in the projection 106.

The heater 108 is energized to heat the water in the inner container 101, and the temperature of the water gradually rises to generate a slight amount of steam. Since the water flows out without being stored in the vapor storage chamber 105, the boiling detector 107 does not operate.

When a large amount of steam is generated from the inside of the inner container 101 due to a boiling state, all of the steam is generated in the first steam discharge passage 10.
4, the steam detector 105 enters the steam storage chamber 105, and the boiling detector 107 detects the steam temperature to cut off the power supply to the heater 7.

[0005]

However, in such a conventional configuration, the boiling detector determines that boiling has occurred before boiling, and cuts off the power supply to the heater (hereinafter referred to as "early cut-off"). 2.) Although erroneous detection can be prevented to some extent, in the early stage of boiling, it is difficult for steam to penetrate into the steam reservoir chamber, so it takes some time from boiling to detection.

Therefore, there is a problem that a large amount of steam is released outside the body before the boiling is detected, and dew forms around.

SUMMARY OF THE INVENTION The present invention solves such a conventional problem, and prevents a malfunction of the temperature detecting means for detecting boiling at an early stage, and promptly detects a boiling state to surely boil the liquid. It is another object of the present invention to provide an electric water heater capable of minimizing the amount of steam discharged outside the body at that time.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention forms an intermediate opening in the middle of a steam passage, and closes the intermediate opening to a temperature detecting means attached to the main body. Arrange the sensing unit, in the vapor passage, when the amount of vapor generated by heating the liquid in the container by the heat source is small, that is, when the flow rate is low,
A bypass path for releasing the steam to the steam discharge port, and a guide section for guiding the steam to the sensing section of the temperature detecting means when the amount of generated steam is large, that is, when the flow rate is high. is there.

When the amount of steam in the middle of boiling water is small and the flow rate is low, the steam is discharged through the bypass passage to the outside of the steam discharge port formed in the lid to detect the temperature. Since it hardly reaches the sensing part of the means, there is no erroneous detection of boiling.

When the steam reaches the boiling point and the amount of steam increases and the flow velocity increases, the steam is guided to the sensing portion of the temperature detecting means by the guide portion, and the temperature of the sensing portion rapidly rises. At least, immediately detect the boiling and cut off the power to the heater. Therefore, it is possible to greatly reduce a large amount of vapor being released outside the body and condensing around.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION
A container having an upper surface opening for storing a liquid disposed in the main body, a lid covering the opening of the container, a heat source for heating the liquid in the container, and a vapor outlet formed in an outer shell of the lid And a steam passage communicating with the opening of the container, an intermediate opening is formed in the middle of the steam passage, and a sensing part of the temperature detecting means attached to the main body is arranged near the intermediate opening. Since the steam passage is an electric water heater having a normal path for guiding steam to the temperature detecting means and a bypass path for not guiding the steam directly to the sensing part, the amount of steam in the middle of water heating is small. When the flow velocity is low, the steam is discharged to the outside of the vessel from the steam outlet formed in the lid through the bypass path, and hardly reaches the sensing part of the temperature detecting means, so that the steam is erroneously detected as boiling. Never.

When the steam reaches the boiling point and the amount of steam increases and its flow velocity increases, the steam is guided by the guide section to the sensing section of the temperature detecting means, and the temperature of the sensing section rapidly rises. At the very least, immediately detect boiling and cut off the power to the heater. At this time, the steam passes through the normal path.

According to a second aspect of the present invention, there is provided a guide portion for guiding steam to a sensing portion of the temperature detecting means, wherein the guide portion is provided with a notch or a hole for forming a bypass path. Therefore, the steam can reliably flow into the bypass path through the notch or the hole, and as a result, the accuracy of erroneous detection is improved.

According to a third aspect of the present invention, the guide portion for guiding the temperature sensing means to the sensing portion has a substantially U-shaped cross section comprising a ceiling portion facing the sensing portion and left and right side walls. Since the ribs are used, the flow path resistance of the bypass path can be reduced with a simple configuration, and since the guide portion is substantially U-shaped, the guided steam is deflected on the way. Instead, they are led to the sensing section.

According to the invention described in claim 4 of the present invention, the guide portion for guiding to the sensing portion of the temperature detecting means is formed by a rib having a substantially rectangular shape or a substantially arc-shaped cross section. Since there is almost no flat surface on the wall surface, even if dew is condensed on the wall surface by steam, it flows down, so that the amount of dew condensation water accumulated in the steam passage can be reduced.

According to a fifth aspect of the present invention, there is provided a container having an upper surface opening for accommodating a liquid disposed in a main body, a lid for covering the opening of the container, and a heat source for heating the liquid in the container. A steam passage communicating with a steam outlet formed in the outer shell of the lid and the opening of the container, forming an intermediate opening in the middle of the steam passage, and forming the intermediate opening in the vicinity of the intermediate opening. Arranging a sensing part of the temperature detecting means attached to the main body, making the vicinity of the base of the sensing part of the main body convex from its periphery,
Since the end portion of the intermediate opening of the steam passage is an electric water heater in which the end portion is close to the convex portion, water droplets accumulated around the sensing portion by the convex portion can be reduced. The rise in the temperature of the sensing portion due to the disturbance can be prevented, and the detection of boiling can be prevented from being delayed.

According to a sixth aspect of the present invention, there is provided a container having an upper surface opening for storing a liquid disposed in a main body, a lid for covering the opening of the container, and a heat source for heating the liquid in the container. A steam passage communicating with a steam outlet formed in the outer shell of the lid and the opening of the container, forming an intermediate opening in the middle of the steam passage, and a surface near the intermediate opening. A metal cover in which a part or a large part of the metal cover is exposed in the space with the intermediate opening is provided, and an attachment member having a projection substantially similar in shape to the inner surface shape of the exposed portion of the metal cover is provided on the metal cover. Along with fitting, a groove is formed in the protrusion, a temperature sensing element is arranged, and a gap between the metal cover and the mounting member is filled with a filler made of an uncured material, so that the electric water heater is used. , Temperature sensing element While in a substantially close contact state over,
The groove can stabilize the position of the temperature sensing element, and by filling the space around the temperature sensing element with a filler, the air in that part can be eliminated, and the heat received by the metal cover by the steam can be quickly lost. It can be transmitted to the temperature sensing element.

Moreover, since the filler is made of a non-cured material, external stress is applied when these are attached to the main body, and the filler changes even if their relative position changes from the initial position. Following the gap, air can be prevented from entering the gap, and the heat transfer performance can be maintained.

In the invention according to claim 7 of the present invention, since the mounting member is formed of a material having high elasticity, by covering the gap between the main body and the metal cover, water from the gap to the inside of the main body is covered. A seal member for preventing intrusion is not required.

[0020] The invention according to claim 8 of the present invention provides a container having an upper surface opening for housing a liquid disposed in a main body, a lid covering the opening of the container, and a heat source for heating the liquid in the container. A steam passage communicating with a steam outlet formed in the outer shell of the lid and the opening of the container, forming an intermediate opening in the middle of the steam passage, and a surface near the intermediate opening. A metal cover in which a part or a large part of the metal cover is exposed in the space with the intermediate opening is provided, and an attachment member having a projection substantially similar in shape to the inner surface shape of the exposed portion of the metal cover is provided on the metal cover. Along with fitting, a temperature detecting element is arranged between the metal cover and the protrusion, and both of the lead wires extending from both ends of the temperature detecting element are opposed to the steam flow at least in a range where the metal cover is exposed. To the side Since the water heater, it is possible to more heat transferred from the lead wire to the sensing element,
Rapid boiling detection can be performed.

According to a ninth aspect of the present invention, there is provided a container having an upper surface opening for storing a liquid disposed in a main body, a lid for covering the opening of the container, and a heat source for heating the liquid in the container. A steam passage communicating with a steam outlet formed in the outer shell of the lid and the opening of the container, forming an intermediate opening in the middle of the steam passage, and forming the intermediate opening in the vicinity of the intermediate opening. The sensor unit is provided with a sensing part of the temperature detecting means attached to the main body, and the electric water heater is provided with the heat exchanging means in the steam passage, so that the heat exchanging means deprives the heat of the steam by dew condensation. It is possible to reduce the amount of steam released to the outside of the body until the boiling is detected.

According to a tenth aspect of the present invention, the heat exchange means is provided in the middle of a path from the opening of the container in the steam passage to the intermediate opening formed near the sensing part of the temperature detecting means. If the amount of steam in the middle of the kettle is low, most of the condensation forms before reaching the sensing part, so the temperature of the sensing part hardly rises, so it is early No false detection of

According to an eleventh aspect of the present invention, in the heat exchanger, the steam formed in the outer shell of the lid from the intermediate opening formed near the sensing part of the temperature detector in the steam passage. Since it is located in the middle of the route to the discharge port, it sends enough steam to the sensing part at the time of boiling and condenses steam from there to the steam outlet, and is discharged outside the body This can reduce the amount of steam generated.

According to the twelfth aspect of the present invention, since the heat exchanging means is integrated with the member forming the steam passage, the number of components can be reduced while achieving the desired performance.

According to the thirteenth aspect of the present invention, the heat exchange means is separate from the member forming the steam passage and is made of a material having good heat conductivity, so that the heat exchange means can be made more compact. As a result, the lid including the steam passage can be reduced in size.

According to a fourteenth aspect of the present invention, there is provided a container having an upper surface opening for storing a liquid disposed in a main body, a lid for covering the opening of the container, and a heat source for heating the liquid in the container. A steam passage communicating with a steam outlet formed in an outer shell of the lid and an opening of the container, and forming an intermediate opening in the middle of the steam passage, wherein the intermediate opening of the main body is provided. An electric water heater in which the sensing part of the temperature detecting means is disposed in the vicinity and at a position deviated in the left-right direction from the center of the rotation axis at the time of opening and closing the opening of the container with respect to the opening of the container. Water droplets adhering to the surface of the lid facing the opening of the container at the time of opening and closing can be prevented from dropping and adhering to the sensing portion and causing a malfunction.

[0027]

Embodiment (Embodiment 1) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, a first embodiment of the present invention will be described. FIG. 1 is a schematic configuration diagram of one embodiment of the present invention.
Is a main body, 2 is a container having an upper surface opening disposed in the main body 1, 3 is a lid covering the opening of the container 2, and 4 is an electric heater which is a heat source for heating liquid in the container.

Reference numeral 5 denotes a motor-driven pump which is a means for discharging the liquid in the container 2 to the outside of the body. The pump 5 sucks the liquid from the suction port 6, and the discharge port 7 of the pump 5 and the outlet 8 to the outside of the body. The liquid is led out of the body via a water pipe 9 communicating with the body.

The lid 3 is a hinge 10 serving as a center of rotation when pivoting to open and close the opening of the container 2, a lock member 12 which engages with the claw receiving portion 11 of the main body 1 when closed,
A steam outlet 13, a steam passage 14 communicating the opening of the container 2 with the steam outlet 13, and a falling water prevention valve 15 for preventing the liquid in the container 2 from flowing out when the main body 1 is turned over. Etc.

An intermediate opening 16 is formed in the steam passage 14 in the middle thereof.
(Hereinafter referred to as “sensor unit”),
It is attached to the main body 1 and arranged.

When the liquid in the container 2 is heated by the heater 4 and is boiled by boiling, the steam generated by the boiling flows into the steam passage 14 and reaches the steam outlet 13, and the intermediate opening 16. Thus, the temperature hits the sensing section 18 of the sensor unit 17 and the temperature thereof is increased. Boiling is detected by the rate of temperature rise or absolute temperature,
The power supply to the heater 4 is cut off.

The path through which the steam is discharged to the outside of the container in this manner is called a normal path, and is indicated by solid arrows in FIGS.

FIGS. 2 and 3 show the configuration around the lid 3, the opening of the container 2, and the sensor unit 17. FIG.
In the middle of the steam passage 14, a guide portion 19 having a substantially U-shaped or substantially U-shaped cross section formed by the top surface and the left and right side surfaces, or a substantially arc-shaped guide portion is formed. The sensor unit 17 extends toward the sensing unit 18.

The steam outlet 13 near the guide portion 19
A hole 20 is formed at the lower part of the space, and when the steam passes through the steam passage 14 before reaching the intermediate opening 16,
A bypass path 51 leading to the steam discharge port 13, that is, a short-circuit path for steam is formed.

With this arrangement, when the amount of steam in the middle of boiling water is small and the flow rate is low, the steam is discharged from the steam discharge port 13 formed in the lid 3 to the outside of the body via the bypass path 51, and the sensor is Since it hardly reaches the sensing part 18 of the unit 17, there is no erroneous detection that boiling has occurred. Note that the flow of steam flowing through the bypass path 51 is indicated by a dashed arrow.

When the steam reaches the boiling point and the amount of steam increases and its flow velocity increases, the steam is guided to the sensing section 18 of the sensor unit 17 by the guide section 19, and the temperature of the sensing section 18 rapidly rises. At least, the boiling is immediately detected and the power supply to the heater 4 is cut off. The flow of the steam is indicated by solid arrows.

The bypass route of the steam may be not a hole but a notch shape, and an appropriate route may be selected according to the balance of the steam flow in the entire steam passage. Guide 19
When the cross-sectional shape of is substantially U-shaped as shown in FIG.
The guided steam is rectified by the left and right side walls 21 and 22 and is less likely to come off the guide portion 19 on the way, and is guided to the sensing portion 18.

When the cross-sectional shape of the guide portion 19 is substantially rectangular or substantially arcuate as shown in FIGS. 5 and 6, there is almost no flat surface on the wall surface of the guide portion. However, since it flows down, the amount of dew condensation water accumulated in the steam passage 14 can be reduced.

In FIGS. 2 and 3, reference numeral 23 denotes a container 2.
After flowing into the inlet 24 of the steam passage generated inside, a bypass rib for guiding the steam once in a substantially opposite direction with respect to the steam outlet 13, the inner wall of the steam passage 14 and the bypass rib 2.
3 is almost in a maze state.

As a result, the steam is guided to the steam outlet 13 while intentionally meandering.
8, it is possible to prevent the malfunction of premature shut-off when the amount of steam is small, and to reduce the amount of steam emitted to the outside of the body until the boiling is detected.

Reference numeral 25 denotes a ceiling located in the middle of the path from the opening of the container 2 to the intermediate opening 16 of the steam passage 14 and higher than the passage near the intermediate opening 16. After reaching the sensing part 18, the steam can reach the sensing part 18 by that much, and the malfunction of prematurely stopping when the steam is small can be prevented.
It is possible to reduce the amount of steam released to the outside of the body until the boiling is detected. Reference numeral 26 denotes a convex portion formed on the main body 1 and surrounds the base of the sensing portion 18.

Since the water droplets accumulated around the sensing portion 18 can be reduced by the convex portions 26, the accumulated water droplets hinder the temperature rise of the sensing portion 18 due to the steam, and the boiling detection is delayed. Delay) can be prevented.

In FIG. 1 to FIG. 3, the normal path (solid arrow) and the bypass path (dashed arrow) have a single outlet for discharging the body. They may be provided separately.

The main components of the sensor unit 17 are a metal cover 27 as an outer shell of the sensing portion 18, a mounting member 29 having a projection 28 having a shape substantially similar to the inner surface of the metal cover 27, The mounting member 29 has a groove 31 formed therein, the temperature detecting element 30 is disposed in the groove 31, and is substantially in close contact with the metal cover 27. A gap between the metal cover 27 and the mounting member 29 is filled with a filler 32 made of a non-cured material.

The temperature detecting element 30 is connected to the metal cover 2.
7 and by disposing the temperature detecting element 30 in the groove 31, the position can be stabilized, and the space around the temperature detecting element 30 is filled with a filler. The air in that portion can be eliminated, and the heat received by the metal cover 27 by the steam can be quickly transmitted to the temperature detecting element 30.

Further, since the filler 32 is made of a non-cured material, an external stress is applied when the sensor unit 17 is mounted on the main body 1 or the like, so that the relative position between the metal cover 27 and the mounting member 29 is the initial position. Even if the gap changes, that is, even if the gap changes, the filler 32 moves following the changing gap, and the intrusion of air into the gap can be prevented, and the heat transfer performance can be maintained.

FIG. 7 shows the mounting member 33 formed of a material having a high elasticity, and a seal portion 34 for covering a gap between the main body 1 and the metal cover 27 is formed. This eliminates the need for a seal member for preventing water from entering the inside of the main body 1 from the gap.

FIG. 8 shows a case in which both lead wires 35 and 36 extending from both ends of the temperature detecting element 30 are arranged on the side facing the steam flow at least in a range where the metal cover 27 is exposed. , 36 to temperature sensing element 3
It is possible to increase the amount of heat transmitted to zero, and to quickly detect boiling.

Embodiment 2 Next, a second embodiment of the present invention will be described. In FIG. 9, reference numeral 37 denotes an opening 39 of the container 2 in the steam passage 38.
A steam passage 38 is provided in the middle of the path from the sensor unit 17 to the intermediate opening 40 formed near the sensing unit 18 of the sensor unit 17.
In the heat exchange unit formed integrally with the heat exchanger, a heat absorbing unit 41 for removing heat of the steam is formed on the inner wall of the passage, and a heat radiating unit 42 for releasing the heat is formed on the outer wall of the passage.

By removing the heat of the steam by the heat exchanging section 37 and condensing the steam, the amount of the steam released to the outside of the body until the boiling is detected can be reduced.

Further, by disposing the heat exchanging section 37 in the middle of the path from the opening of the container 2 to the intermediate opening 40, if the amount of steam in the middle of water heating is small, the sensing section 18 can be used. Most of the dew condensation occurs before the temperature rises, and the temperature of the sensing section 18 is hardly increased.

Furthermore, by integrating the heat exchanging section 37 with the member forming the steam passage 38, the number of components can be reduced while achieving the desired performance.

Embodiment 3 Next, a third embodiment of the present invention will be described. FIG.
In the figure, reference numeral 43 denotes a heat exchanging section disposed in the middle of a path from an intermediate opening 45 formed in the vicinity of the sensing section 18 of the sensor unit 17 to the steam outlet 13 in the steam path 44. 44, and is formed of a material having good heat conductivity.

By disposing the heat exchanging section 43 at this position, sufficient steam for detection is sent to the sensing section 18 at the time of boiling, while the steam is condensed from there to the steam discharge port 13, and It can reduce the amount of steam discharged outside the body.

Further, by forming the heat exchanging portion 43 with a material having good heat conductivity, the heat exchanging portion 43 can be further downsized. As a result, the lid 3 including the steam passage 44 can be downsized. Can be.

(Embodiment 4) Next, a fourth embodiment of the present invention will be described. FIG.
12, the sensor unit 17 is shifted in the left-right direction from the center 49 of the rotating shaft 48 in the vicinity of the intermediate opening 47 of the vapor passage 46 and when the lid 3 opens and closes the opening of the container 2. It is arranged in the position.

Thus, when the lid 3 is opened and closed, the possibility that water droplets adhering to the surface 50 facing the opening of the container 2 of the lid 3 drop and adhere to the sensing portion 18 is greatly reduced. A malfunction can be prevented.

[0058]

According to the present invention, when the amount of steam in the middle of boiling water is small and the flow speed is low, the steam is discharged to the outside of the body from the steam discharge port formed in the lid through the bypass path. Therefore, since it hardly reaches the sensing part of the temperature detecting means, it is not erroneously detected that boiling has occurred.

Further, when the temperature reaches the boiling point and the amount of steam increases and the flow speed increases, the boiling point is immediately detected and the power supply to the heater is interrupted. That can be greatly reduced.

In addition , the flow path resistance of the bypass path can be further reduced with a simple structure, and since the guide portion is substantially U-shaped, the guided steam can be received without warping in the middle. It is led to the feeling part.

[0061] Also, there is little flat on the wall surface of the guide portion, so flows down even if dew condensation on the wall by steam, it is possible to reduce the amount of condensed water accumulates into the steam passage.

[0062] Further, it is possible to reduce the water droplets accumulated around the sensing part by the convex portion, preventing the accumulated water droplets, the temperature rise of the sensing part with steam is disturbed that the boiling detecting slower it can.

[0063] Also, the temperature sensing element, thereby substantially close contact to the metal cover, it is possible to stabilize the position of the temperature sensing element by the groove and by filling the space around the temperature sensing element with a filler The air in that portion can be eliminated, and the heat received by the metal cover by the steam can be quickly transmitted to the temperature detecting element.

Moreover, since the filler is made of a non-cured material, external stress is applied when these are attached to the main body, and the filler changes even if their relative position changes from the initial position. Following the gap, air can be prevented from entering the gap, and the heat transfer performance can be maintained.

[0065] Moreover, those formed by a material rich the mounting member to the elastic, in this mounting member, by covering the gap between the body and the metal cover, for preventing entry of water into the body through the gap The need for a sealing member is eliminated.

[0066] Further, it is possible to increase the heat transferred from the lead wire to the sensing element, it is possible to perform rapid boil sensing.

[0067] Further, by condensation deprive steam heat by the heat exchange means, which makes it possible to reduce the amount of vapor released in the vessel outside the body until detection boiling.

[0068] Also, when the amount of steam in the middle of the kettle is small, since the condensation most of the up to the sensing part, not erroneous detection because hardly increase the temperature of the sensing part.

In addition , while sufficient steam for detection is sent to the sensing part at the time of boiling, the steam is condensed from there to the steam discharge port, so that the amount of steam discharged outside the body can be reduced. is there.

[0070] Further, the heat exchanging means, by a member integrally forming a steam passage, while exhibiting the performance of interest, it can reduce the component.

[0071] Further, the heat exchange means, a member and another member to form a steam passage, and by material having superior thermal conductivity, can more compact heat exchanger means, as a result, including steam passages The lid can be downsized.

[0072] Also, water droplets adhering to the surface which is facing the opening of the container lid when the lid closing may fall, it is possible to prevent the lead to malfunction by attaching the sensing part.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a schematic configuration of an electric water heater showing a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part around a lid of the electric water heater.

FIG. 3 is an enlarged vertical sectional view of a main part around a lid of the electric water heater.

FIG. 4 is a perspective view showing one embodiment of a shape of a steam guide portion of a steam passage of the electric water heater.

FIG. 5 is a perspective view showing another embodiment of the shape of the steam guide portion of the steam passage of the electric water heater.

FIG. 6 is a perspective view showing another embodiment of the shape of the steam guide portion of the steam passage of the electric water heater.

FIG. 7 is an enlarged longitudinal sectional view of a main part showing an embodiment around the sensor unit of the electric water heater.

FIG. 8 is an enlarged vertical sectional view of a main part showing another embodiment around the sensor unit of the electric water heater.

FIG. 9 is an enlarged longitudinal sectional view of a main part showing a periphery of a lid of an electric water heater according to a second embodiment of the present invention.

FIG. 10 is an enlarged longitudinal sectional view of a main part showing a periphery of a lid of an electric water heater according to a third embodiment of the present invention.

FIG. 11 is an enlarged cross-sectional view of a main part showing a periphery of a lid of an electric water heater according to a fourth embodiment of the present invention.

FIG. 12 is an enlarged longitudinal sectional view of a main part showing a periphery of a lid of the electric water heater.

FIG. 13 is a longitudinal sectional view showing a schematic configuration of a conventional electric water heater.

FIG. 14 is an enlarged vertical sectional view showing the vicinity of a steam discharge path.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Container 3 Lid 4 Heater 10 Hinge part 13 Steam discharge port 14 Steam passage 16 Intermediate opening part 17 Temperature detecting means (sensor unit) 18 Sensing part 19 Guide part 20 Hole part 25 Ceiling part 26 Convex of main part Part 27 Metal cover 28 Protrusion part 29, 33 Mounting member 30 Temperature sensing element 31 Groove part 32 Filler 34 Seal part 35, 36 Lead wire 37, 43 Heat exchange part 38, 44 Steam passage 40 Intermediate opening 45, 47 Intermediate opening 46 Steam passage 48 Rotating shaft 51 Bypass route

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Noboru Matsuda 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Yoshitada Nakao 1006 Okadoma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. In-company (72) Inventor Kazuo Oyabu 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Takayuki Urata 1006 Okadoma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Invention Person Junichi Nawa 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture (72) Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Satoshi Shimizu 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP 08 -131333 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) A47J 27/21 101

Claims (14)

(57) [Claims] 1. A container having an upper surface opening for storing a liquid disposed in a main body, a lid covering an opening of the container, a heat source for heating the liquid in the container, and an outer shell of the lid. A steam passage communicating the formed steam outlet with the opening of the container; forming an intermediate opening in the middle of the steam passage; receiving a temperature detecting means attached to the main body near the intermediate opening; An electric water heater having a sensing part, wherein the steam passage has a normal path for guiding the steam to the temperature detecting means, and a bypass path for not guiding the steam directly to the sensing part. 2. The device according to claim 1, further comprising a guide for guiding the steam to the sensing portion of the temperature detecting means, wherein the guide has a notch or a hole forming a bypass path.
The described electric kettle. 3. A guide portion for leading to a sensing portion of the temperature detecting means,
3. The electric water heater according to claim 2, comprising a rib having a substantially U-shaped cross section formed by a ceiling portion facing the sensing portion and left and right side walls. 4. A guide portion for leading to a sensing portion of the temperature detecting means,
3. The electric water heater according to claim 1, wherein a cross section of the rib comprises a substantially U-shaped or substantially arc-shaped rib. 5. A container having an upper surface opening for storing a liquid disposed in the main body, a lid covering the opening of the container, a heat source for heating the liquid in the container, and an outer shell of the lid. A steam passage communicating the formed steam outlet with the opening of the container; forming an intermediate opening in the middle of the steam passage; receiving a temperature detecting means attached to the main body near the intermediate opening; An electric water heater having a sensing portion, wherein the vicinity of the base of the sensing portion of the main body is protruded from the periphery thereof, and the end of the intermediate opening of the steam passage is close to the projection. 6. A container having an upper surface opening for storing a liquid disposed in the main body, a lid covering the opening of the container, a heat source for heating the liquid in the container, and an outer shell of the lid. A steam passage communicating the formed steam discharge port and the opening of the container is provided, and an intermediate opening is formed in the middle of the steam passage. A metal cover exposed in a space with an opening is arranged, and a mounting member having a protrusion having a shape substantially similar to the inner surface shape of the exposed portion of the metal cover is fitted to the metal cover, and An electric water heater in which a groove is formed, a temperature detecting element is arranged, and a gap between the metal cover and the mounting member is filled with a filler made of an uncured material. 7. The electric water heater according to claim 6 , wherein the mounting member is formed of a material having high elasticity. 8. A container having an upper surface opening for storing a liquid disposed in the main body, a lid covering the opening of the container, a heat source for heating the liquid in the container, and an outer shell of the lid. A steam passage communicating the formed steam discharge port and the opening of the container is provided, and an intermediate opening is formed in the middle of the steam passage. Disposing a metal cover exposed in a space having an opening, fitting a mounting member having a projection having a shape substantially similar to the inner surface shape of the exposed portion of the metal cover, fitting the metal cover to the metal cover, An electric water heater in which a temperature detecting element is arranged between a projection and both ends of a lead wire extending from both ends of the temperature detecting element are arranged at least on a side facing a steam flow in a range where the metal cover is exposed. 9. A container having an upper surface opening for storing a liquid disposed in the main body, a lid covering the opening of the container, a heat source for heating the liquid in the container, and an outer shell of the lid. A steam passage communicating the formed steam outlet with the opening of the container; forming an intermediate opening in the middle of the steam passage; receiving a temperature detecting means attached to the main body near the intermediate opening; An electric water heater having a sensing part and a heat exchange means arranged in the steam passage. 10. The heat exchange means from the opening of the container in the vapor passage, temperature detecting means according to claim 8, wherein arranged in the middle of the sensing part reaches the intermediate opening formed in the vicinity of the path Electric water heater. 11. The heat exchange means is disposed in the middle of a path from an intermediate opening formed in the vicinity of a sensing part of the temperature detecting means in the steam passage to a steam outlet formed in an outer shell of the lid. An electric water heater according to claim 8, wherein 12. The electric water heater according to claim 8 , wherein the heat exchange means is integrated with a member forming the steam passage. 13. The heat exchange means may claim a member and another member to form a steam passage, and composed of a material having good thermal conductivity 8
The electric water heater according to any one of claims 10 to 10 . 14. A container having an upper surface opening for storing a liquid disposed in the main body, a lid covering the opening of the container, a heat source for heating the liquid in the container, and an outer shell of the lid. A steam passage communicating the formed steam outlet and the opening of the container is provided, and an intermediate opening is formed in the middle of the steam passage.
An electric water heater in which a sensing part of a temperature detecting means is disposed near the intermediate opening of the main body and at a position shifted in the left-right direction from a center of a rotation axis when the lid is opened and closed with respect to the opening of the container. vessel.