JP2012196311A - Electric water-heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate direct discharge of water vapor from a rid part to outside with an electric pot or other type of an electric water-heater.SOLUTION: The electric water heater includes: a container body equipped with an inner container for storing a liquid and a heater for heating the liquid; and a rid for covering the upper side of the container body. The rid does not include a vapor outlet for discharging vapor outside therefrom.

Description

  The present invention relates to a structure of an electric water heater in which a liquid in a liquid container is heated and boiled by an electric heating means such as a heater.

  Such an electric water heater generally comprises an inner container for containing a liquid and a container main body provided with a heating means for heating the liquid in the inner container, and a lid that covers the upper side opening of the container main body. A steam outlet for discharging steam to the outside when boiling is provided on the upper surface of the lid.

  This steam port introduces steam from the steam inlet part on the inner surface side of the lid, and discharges it from the upper surface side slit-like steam outlet through the steam discharge passage through the overturn stop valve above the indoor space. (For example, refer to the configuration of Patent Document 1).

  As a result, the pressure in the liquid container at the time of boiling is lowered, the hot water in the container is boiled safely in a smooth form, and after boiling is continued for a predetermined time, the temperature is kept as needed. Transition to state.

JP 2009-189519 A (see FIG. 1)

  However, in the case of the electric water heater as described above, there are cases where the electric water heater is used while being placed on the floor surface. In such a case, a child or the like may touch the steam discharged from the steam port.

  In addition, if a large amount of steam is emitted, the humidity in the room becomes high, and the bran and wallpaper are moistened. If the boiling state continues more than necessary, power consumption increases.

  Therefore, it is preferable to prevent the steam itself from going outside by some method or to reduce the amount of generated steam itself.

  However, so far, no electric water heater with such measures has been found, and effective measures are required.

  The present invention has been made based on such circumstances, and provides an electric water heater that prevents vapor from being discharged from the lid by eliminating a steam port that discharges steam from the lid itself. It is for the purpose.

  In order to achieve the above object, the present invention is configured with the following problem solving means.

(1) Invention of Claim 1 This invention consists of a container main body provided with the heating container which heats the liquid in the inner container and this inner container which puts a liquid, and the cover part which covers the upper side opening part of this container main body. In this electric water heater, the lid portion is not provided with a steam port for discharging steam from the lid portion to the outside.

  According to such a configuration, the lid portion is not provided with a steam port for discharging steam from the lid portion to the outside, so that steam is not directly discharged from the lid portion to the outside as in the prior art.

  Therefore, the conventional problems such as children touching the steam discharged from the steam port, the humidity in the room becomes high, and the bran and the wallpaper get wet are surely solved.

(2) Invention of Claim 2 This invention is the configuration of the invention of Claim 1 above, wherein a vapor cooling cartridge is provided on the side wall of the container body, and the vapor cooling cartridge is the upper end side vapor. The inflow port portion communicates with the vapor discharge port portion on the lid side.

  As described above, when the vapor cooling cartridge is provided on the side wall portion of the container main body, and the upper end side vapor inflow port portion of the vapor cooling cartridge communicates with the lid portion side vapor discharge port portion, the container main body Vapor generated in the liquid container is introduced into the vapor cooling chamber in the vapor cooling cartridge through the vapor discharge port downstream of the lid side vapor discharge passage, and is efficiently cooled by the temperature difference from the external temperature. Is condensed.

  As a result, almost no steam is discharged from the steam cooling cartridge to the outside, and a steam-less type electric water heater is realized.

(3) Invention of Claim 3 This invention is the structure of the said invention of Claim 1 or 2, The cartridge for vapor | steam cooling is detachable with respect to a container main body, It is characterized by the above-mentioned.

  As described above, when the vapor cooling cartridge is detachable from the container body, it is convenient to discharge the cooled and condensed liquid or to clean the inside of the cartridge.

(4) Invention of Claim 4 This invention is a structure of invention of the said Claim 1, 2 or 3, It is steam between a steam discharge port by the side of a cover part from the steam inlet of a cartridge for steam cooling. It is characterized in that a steam sensor for detecting the occurrence of water vapor is provided.

  In this way, if a vapor sensor for detecting the generation of vapor is provided from the vapor outlet on the lid side to the vapor inlet of the vapor cooling cartridge, it is confirmed that boiling has started in the liquid container. It is possible to detect immediately and stop the heating means for boiling water before the steam is discharged to the outside, so that a steam-less function can be realized in a more reliable form.

  In addition, since the heating means for boiling water can be stopped as soon as possible when boiling, it is not necessary to continue boiling unnecessarily, power consumption is small, and energy saving performance is improved.

  As a result, according to the present invention, it is possible to provide an electric water heater that is steamless, safe and energy-saving at low cost.

It is a longitudinal cross-sectional view which shows the whole structure of the electric pot which concerns on Embodiment 1 of this invention. It is a rear view of the whole electric pot. It is an expanded sectional view of the important section of the electric pot. It is a rear view which shows the structure of the cartridge for vapor | steam cooling of the same electric pot. It is AA sectional drawing of FIG. 4 which shows the structure of the cartridge for vapor | steam cooling of the same electric pot. It is a longitudinal cross-sectional view which shows the whole structure of the electric pot which concerns on Embodiment 2 of this invention. It is a rear view of the whole electric pot. It is an expanded sectional view of the important section of the electric pot.

<Embodiment 1>
Hereinafter, the configuration of the electric water heater according to Embodiment 1 of the present invention will be described with reference to the accompanying drawings.

  In this embodiment, as an example of the electric water heater of the present invention, the case of an electric pot having a water heater and a heat retaining function is shown.

  FIG. 1 of the accompanying drawings is an overall longitudinal sectional view of the electric pot, FIG. 2 is a rear view of the electric pot, FIG. 3 is an enlarged sectional view of the main part of the electric pot, and FIG. 4 is for steam cooling of the electric pot. FIG. 5 is a rear view of the cartridge portion, and FIG. 5 is a cross-sectional view (A-A cross-sectional view of FIG. 4) of the vapor cooling cartridge portion of the electric pot.

  First, the configuration of the pot body portion of the electric pot according to the first embodiment of the present invention will be described.

(Configuration of the electric pot body)
The electric pot shown in FIGS. 1 to 3 includes a container body 1 having an inner container 3 for boiling and hot water storage, a lid body 2 that opens and closes an upper side opening of the container body 1, and a water heater for the inner container 3. A hot water heater 4A that is a heating means that heats the inner container 3; a heat retaining heater 4B that is a heating means that heats the inner container 3 while keeping the temperature; and a hot water supply passage for pouring hot water in the inner container 3 to the outside (Hot water pouring passage) 5 and an electric hot water supply pump 6 for pouring hot water in the inner container 3 to the outside through the hot water supply passage 5 in a state where an AC power source is connected. ing.

  The container body 1 includes a metal or steel plate-shaped cylindrical outer case 7 constituting the outer side surface part, the inner container 3 constituting the inner side part, and the outer case 7 and the inner container 3 integrated on the upper side. It consists of a synthetic resin-made annular shoulder member 8 that is fixedly coupled to the base plate and a synthetic resin-made dish-shaped bottom member 9 that constitutes the bottom surface portion.

  The inner container 3 is formed by joining together a stainless steel bottomed cylindrical inner cylinder 3A and a cylindrical outer cylinder 3B which is also made of stainless steel and has no bottom at the upper end side 3b and lower end side 3c portions. It consists of a heat insulation structure having a high vacuum insulation wall structure with a vacuum insulation space provided between the inner cylinder 3A and the outer cylinder 3B. The bottom 3a has an inner cylinder 3A and an outer cylinder on the outer peripheral side. A single plate portion 3e constituted only by the bottom surface portion of the inner cylinder 3A is formed except for the joint portion with 3B. The single plate portion 3e is formed so as to protrude slightly higher upward. On the lower surface side thereof, the water heater 4A and the heat retaining heater 4B (for example, two sets of heating elements having different wattages are held on the mica plate). A mica heater is attached.

  In front of the upper end portion 3b of the inner container 3, an opening for water supply having a heat-keep structure in which the upper end portion on the side of the inner cylinder 3A is drawn into a convex portion having a semicircular cross section toward the central axis direction. 3d is formed. Reference numeral 12 is a convex full water level display portion for displaying the full water level in the inner container 3 in which a part on the back side of the inner cylinder 3A is partially protruded inward.

  The lid 2 is composed of a synthetic resin upper plate 13 and a synthetic resin lower plate 15 whose outer peripheral edges are coupled to each other via an intermediate plate 14 with respect to the upper plate 13. A hinge receiving portion 8a provided at the rear end portion of the shoulder member 8 is supported through a hinge pin 17 and a hinge lock 16 so that it can be opened and closed in a vertical direction and detachable. Reference numeral 10 denotes a heat insulating space formed between the upper plate 13 and the middle plate 14 of the lid body 2, and reference numeral 11 denotes a lid opening / closing lever that regulates the open / closed state of the lid body 2.

  Further, steam discharge passages 21a to 21c communicating with each other from the lower plate 15 side toward the middle plate 14 side are provided at the lower portion of the lid body 2, and the steam discharge passages 21a to 21c are connected to the lid body. A terminal end portion of the most downstream side passage 21c in the upper part of the rear side vertical wall portion of the lower plate 15 of the body 2 serves as a steam discharge port 21d from the lid body 2 to the outside. Reference numeral 22 denotes a tipping stop water valve disposed in the middle of the upstream steam outlet passage 21a of the steam discharge passages 21a to 21c.

  Further, a metal inner cover member 23 having a steam inlet 23 a into the steam discharge passage 21 a is fixed to the lower surface side of the lower plate 15 in the lid body 2. A heat-resistant rubber seal packing 24 that is pressed against the upper surface of the water supply opening 3d at the upper end of the inner container 3 when the lid 2 is closed is provided on the outer peripheral edge (entire circumference).

  On the other hand, in the case of this embodiment, the upper side middle plate 14 and the upper plate 13 of the lid 2 have a steam outlet and steam that open to the outside from the steam discharge passages 21a to 21c as in the prior art. No mouth portion is provided at all, and instead, a steam cooling cartridge 30 communicating with a steam discharge pipe (connecting pipe) 45, which will be described later, is provided on the back side of the container body 1, and the steam cooling The steam from the steam discharge passages 21a to 21c is introduced into the first and second steam cooling passages 32b and 32c of the cartridge 30 for cooling and liquefaction.

  As shown in FIGS. 4 and 5, for example, the vapor cooling cartridge 30 is divided into a U-shaped and a vertical partition in a rectangular parallelepiped cassette case 31 that is long in the vertical direction. Walls 31c, 31d and diagonal horizontal partition walls 31a, 31a,..., 31b, 31b... Facing each other from both the left and right sides with a predetermined interval are provided from left to right. The first steam cooling passage 32b and the first steam cooling passage 32b that are bent in a zigzag shape from the right side to the left side, from the left side to the right side, and vice versa after the steam port 33c is bypassed in a U-shape. A side of the cooling passage is U-turned from the bottom to the top to form a second steam cooling passage 32c that goes to the steam port 33c to the outside, and the steam inlet 33a, Center back side The steam port 33c opened to the outside is formed, and a plate-like engagement piece inserted into and engaged with the steam cooling cartridge engagement groove 34a of the bottom member 9 on the container body 1 is formed on the front surface on the lower end side. 34b protrudes outward from the steam inlet 33a portion at the upper end side steam inlet 33a portion, and has a cylindrical connecting port portion 33b fitted into the container body 1 side connecting port portion 45b. Is provided.

  On the other hand, from the steam discharge port 21d portion at the downstream end of the steam discharge passages 21a to 21c of the lid 2 corresponding to the shoulder member 8 of the container body 1, the back side steam cooling cartridge 30 of the shoulder member 8 of the container body 1 is provided. A steam discharge pipe (connecting pipe) 45 bent in a crank shape from above to below is disposed toward the connecting port portion 33b and the steam inlet port 33a.

  The steam discharge pipe (connection pipe) 45 connects the upstream end side connection port portion 45a to the steam discharge port 21d at the downstream end of the steam discharge passages 21a to 21c, while the downstream end side connection port portion 45b includes The steam inlet connecting port 33b of the steam cooling cartridge 30 is detachably fitted. As a result, the upper end side of the vapor cooling cartridge 30 is fixed to the container body 1.

  After starting boiling, the steam from the inner container 3 discharged through the steam inlet 23a and the steam discharge passages 21a to 21c at the bottom of the lid 2 first passes through the steam discharge pipe 45 described above. After flowing in a crank shape from above and receiving a predetermined level of cooling action, after being introduced into the steam introduction space (steam port bypass passage) 32a from the connection port 33b and the steam inlet 33a, the first The steam cooling passage 32b is effectively blocked by flowing in a zigzag manner in a flat state as shown in the figure while being blocked by the partition walls 31a, 31a, ..., 31b, 31b ... It is cooled and condensed to liquefy, and is fixed to the liquid retaining portion 35 at the bottom.

  On the other hand, the remaining steam that has not been liquefied is further cooled through the second steam cooling passage 32c described above, and then flows upward from below to be further liquefied. The liquid liquefied here flows down from the wall surface or the like, and is also retained by the liquid retaining portion 35.

  The downstream end of the second steam cooling passage 32c is at a position corresponding to the above-described steam port 33c portion, but the downstream end portion is an enlarged space 32d widely surrounded by the U-shaped partition wall 31c. Thus, the pressure of the residual steam discharged in the same portion is effectively diffused and is discharged from the steam port 33c in a state of leaking.

  As a result, almost no steam is exhausted to the outside from the steam port 33c, and only a small amount of the steam is slowly exhausted.

  Furthermore, at the front end position of the bottom portion 3a of the inner container 3 on the upstream end side of the hot water supply passage 5, for example, a shaft seal type is provided via the inner container 3 side hot water introduction cylinder 6a and the hot water supply pump side hot water inlet 6b. A direct-current electric hot water supply pump 6 is disposed, and in the hot water supply passage 5, hot water sucked from the hot water inlet 6 b through the hot water introduction tube 6 a is pumped by the electric hot water supply pump 6. It is discharged from the discharge port 6c, and is led out through the lower end connecting portion 5a and the straight pipe portion 5b of the hot water supply passage 5 to the hot water pouring outlet 5d to the outside from the tipping stop valve 18 side connecting pipe 5c.

  Reference numeral 25 denotes an operation panel unit provided with an operation surface of various switches described later and a display surface of liquid crystal display means. It is a substrate.

  The operation panel 25 has a hot water switch that is driven by turning on the drive motor of the hot water supply pump 6 by the ON operation, a timer lock for the ON operation of the hot water switch, and a hot water supply that releases the locked state by the ON operation. A lock release switch, a reboil / warm selection switch, a good night timer switch, a reboil display LED, a heat retention operation display LED, a hot water supply unlock display LED, a liquid crystal display, and the like are provided.

  The display surface of the liquid crystal display section is provided with, for example, a time / time / water temperature / operating state combined display section, a heat retention set temperature display section, a glass bottle heat retention display section, etc. Has been made.

  By the way, the passage 45a portion (a portion of a predetermined length extending in the horizontal direction) of the steam discharge pipe (connection pipe) 45 provided in the shoulder member 8 portion with the steam discharge passages 21a to 21c side steam discharge port 21d. The passage diameter is inclined so that the height of the passage bottom wall surface 45c gradually increases from the inlet side to the outlet side, so that the passage bottom wall surface 45c portion is inclined downward before the condensed water returns. While preventing the stagnation of the liquid droplets, the passage diameter is gradually reduced from the upstream side to the downstream side in the connecting port portion 45a. However, the passage diameter of each part after the downstream end (portion in which the passage direction is bent downward) of the part is the connection port part 45b of the steam discharge pipe 45 and the connection port part 33b of the steam cooling cartridge 30. And the steam inlet 33a, the steam introduction space (steam port bypass passage) 32a, the first and second steam cooling passages 32b and 32c, and the steam port 33c are all equal to the passage diameter φ of the downstream end portion, or It is formed larger (preferably larger in order) than the passage diameter φ of the downstream end portion. And thereby, the internal pressure at the time of boiling in the inner container 3 at the passage diameter φ of the downstream end of the connection port portion 45a with the steam discharge port 21d of the steam discharge pipe (connection pipe) 45 is described above. The relief can be regulated to a safe internal pressure level at which the hot water in the inner container 3 does not protrude to the outside through the hot water supply passage 5.

  And, the above-described bottom wall surface portion 45c that is inclined forward and downward so as to increase in height from the upstream side to the downstream side of the steam discharge pipe (connection pipe) 45 so that liquefied condensed water does not stagnate, The steam detector 25a of the steam sensor 25 is installed in a form protruding in the passage. The steam detection signal of the steam sensor 25 is input to a microcomputer (control unit) below the operation panel unit 25 described above via a predetermined harness 26.

  That is, the steam sensor 25 sends the first steam (about 80 ° C.) when the water in the inner container 3 starts boiling to the steam inlet 23a below the lid 2 above the inner container 3, Detection is performed in the shortest possible time through the extremely short passages of only the steam discharge passages 21a to 21c and the steam discharge port 21d, and the detection signal of the steam generation is promptly sent to the microcomputer (control unit) as described above.

  Then, the microcomputer (control unit) immediately stops the energization of the water heater 4A described above, finishes the water heating operation, waits for the temperature to decrease to the preset target heat retention temperature, and uses the heat insulation heater 4B. Shift to control.

  Therefore, in the case of the above configuration, since the water heater 4A is turned off immediately after boiling and the heater 4A is turned off, the amount of steam generated at the time of boiling is suppressed with extremely high responsiveness, and the generated steam is a small amount generated by residual heat. Only things are central.

  In addition, the minimum amount of steam passes through the steam discharge pipe (connecting pipe) 45 and the steam inflow port 33a, and the steam introduction space (steam port bypass passage) 32a and the first and the first in the steam cooling cartridge 30 described above. It is introduced into the second steam cooling passages 32b and 32c, is effectively cooled from both the front and rear wall surfaces thereof, is condensed into droplets, and the condensed droplets pass through the front and rear wall surfaces of the passages 32b and 32c. Then, it flows down and is fastened to the liquid retaining portion 35 at the bottom of the lower cassette case 31.

  In this way, most of the generated steam is liquefied and recovered as water in the liquid retaining portion 35, and only a part of the remaining steam is gently discharged to the outside through the steam port 33c of the grill structure.

  For this reason, according to the above configuration, it is possible to provide almost no steam-less type electric pot at a very low cost.

  In this case, the steam cooling cartridge 30 on the back side of the container main body 1 is placed between the front wall side of the cassette case 31 and the front and rear sides having a sufficient width as shown in FIGS. Direction air circulation space S is provided, and the cooling effect on the front side of the cassette case 31 is maintained as high as possible. In that case, if necessary, the container body 1 side steam is provided. By providing a necessary gap between the side wall portion of the cooling cartridge installation recess and the side portion of the cassette case 31, it is possible to allow air to flow.

  The cassette case 31 is composed of, for example, a front-side unit 31B and a back-side unit 31A that can be divided, as understood from the cross-sectional structure shown in the drawing. The cassette case 31 includes an outer peripheral wall portion and a partition wall 31a, The parts 31b, 31c, 31d are integrated so as to be detachably fitted to each other, and the interior can be cleaned by dividing them as necessary.

  Further, a drain discharge port 40a having a rubber drain cap 40 is provided at the liquid retaining portion 35 position of the front side unit 31B, for example, as shown in FIG. , The condensate that has been fastened can be thrown away.

<Embodiment 2>
Hereinafter, the configuration of an electric water heater according to Embodiment 2 of the present invention will be described with reference to the accompanying drawings.

  Also in this embodiment, as an example of the electric water heater of the present invention, the case of an electric pot having a water heater and a heat retaining function is shown.

  6 of the accompanying drawings is an overall longitudinal sectional view of the electric pot, FIG. 7 is a rear view of the electric pot, and FIG. 8 is an enlarged sectional view of a main part of the electric pot.

  The electric pot of this embodiment is the same as that of the first embodiment in which the steam sensor 25 is provided in the above-described steam discharge pipe 45 portion, and the steam port at the end of the steam cooling passage in the steam cooling cartridge 30. Even when a failure or the like occurs in the first steam sensor 25 on the side of the steam discharge pipe 45 by providing the steam detection portion 27a of the second steam sensor 27 in the inner portion (enlarged space 32d portion) 33c. The steam is detected by the second steam sensor 27 on the 33c side, the water is heated, and the heater 4A can be turned off. Other configurations are all the same as those of the first embodiment described above, and have the same effects.

  In this case, the detection sensitivity (reference temperature) of the second steam sensor 27 is set to, for example, about 50 ° C. in consideration of the outside air temperature.

  That is, in this embodiment, a sensor holder fitting opening of a predetermined size is provided in the lower part of the upper end side steam discharge pipe 45 of the steam cooling cartridge 30 installation part on the back side of the outer case 7 of the container body 1 described above. The steam sensor holder 37 for fitting the steam sensor is fitted and locked, and the steam sensor holder 37 is encased in the front and rear direction by the respective cylindrical portions of the rear side support bracket 38 and the front side support bracket 39. The second steam sensor 27 having the same structure as the first steam sensor 25 described above is provided, and the annular slit portion 39a on the outer peripheral side of the cylindrical portion of the front support bracket 39 and the second steam are provided. The detection part 27a portion of the sensor 27 is fixed so as to protrude rearward by a predetermined length.

  On the other hand, on the front wall side corresponding to the steam port 33c on the back side of the cassette case 31 of the steam cooling cartridge 30, an annular front support bracket 39 protruding rearward from the outer case 7 of the container body 1 is provided. A sleeve-like fitting port (cylindrical part) 36 that is liquid-tightly fitted via a predetermined seal member is provided in the slit part 39a of the sleeve, and the fitting hole 36 is attached to and detached from the annular slit part 39a. By fitting (press-fitting) as much as possible, the steam detector 27a of the second steam sensor 27 is positioned in the steam port 33c.

  Thereby, the arrival of steam at the steam port 33c is detected.

  The detected signal is input to the microcomputer (control unit) part below the operation panel 25 described above via the harness 28 as in the case of the first steam sensor 25, and the water heater 4A. Is used as an OFF control signal.

(Other embodiments)
In the configuration of the first and second embodiments described above, the case of an electric kettle has been described as an example of the electric water heater of the present invention, but this may be changed to an electric water heater such as an electric kettle without a heat retaining function. Needless to say, it is good.

  1 is a container body, 2 is a lid body, 3 is an inner container, 4A is a water heater, 4B is a heat retaining heater, 5 is a hot water supply passage (hot water pouring passage), 6 is an electric hot water supply pump, 11 is a lid opening / closing lever, 13 is an upper plate, 14 is an intermediate plate, 15 is a lower plate, 21a to 21c are steam discharge passages, 21d is a steam discharge port at the end of the steam discharge passage, 30 is a steam cooling cartridge, 31 is a cassette case, 31a, 31b, 31c and 31d are partition walls, 32a is a steam introduction space (a steam port bypass passage), 32b is a first steam cooling passage, 32c is a second steam cooling passage, 33a is a steam inlet, and 33b is a steam discharge pipe 45. The connection port portion, 33c is a steam port, 35 is a liquid retaining portion, and 45 is a steam discharge pipe (connection pipe).

Claims (4)

  An electric water heater comprising an inner container for containing a liquid and a container main body provided with a heating means for heating the liquid in the inner container, and a lid covering the upper side opening of the container main body. Is an electric water heater characterized by being provided with no steam port for discharging steam from the lid portion to the outside.   A vapor cooling cartridge is provided on the side wall of the container body, and the vapor cooling cartridge has an upper end side steam inlet portion communicating with a vapor outlet portion on the lid side. The electric water heater according to claim 1.   3. The electric water heater according to claim 1, wherein the vapor cooling cartridge is detachable from the container body.   The steam sensor for detecting the generation of steam is provided between the steam outlet on the lid side and the steam inlet of the steam cooling cartridge. Electric water heater.

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