JP2008145091A - Electric instantaneous water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve power saving, miniaturization and lightening in weight, and to facilitate maintenance and cleaning for a water duct line. <P>SOLUTION: This electric instantaneous water heater includes a bottomed cylindrical thermal conductive container body, which is so constructed that a truncated conical hole tapered downward is provided inside, a conical recessed part tapered downward is formed at the lower end to make the bottom, and a hot water supply outlet is provided to penetrate the central part of the recessed part. A spacer shaped like a thin cylinder is fitted to the inside. The spacer is provided with a plurality of water duct line cutouts formed continuously from the upside to the lower side at equal spaces in the circumferential direction. A thermal conductive core is fitted inside the spacer to such a position that the upper parts of the water duct line cutouts of the spacer are exposed to the upside. A first heating unit is wound round the outer peripheral surface of the container body, and a second heating unit is wound round the periphery of the hot water supply outlet at the bottom of the container body. A circumferential groove deeper than the outer peripheral surface where the first heating unit is wound is provided in a boundary part between the container body where the first heating unit is wound and the container body bottom where the second heating unit is wound, The container body is covered with a heat insulating cover. A valve and a water spray nozzle are connected to the a water supply duct line. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electric water heater.

  As an example of a conventional electric water heater, three electric heating elements are sealed in a sealed container body, and the container body wall is heated to a high temperature of 100 ° C. or more by radiant heat of the electric heating element, heated air and a derivative in the container body. There was one which heated, boiled hot water by the heat of the inner wall, flowing water through a narrow water channel (several mm) between the cylindrical inner wall and the cylindrical outer wall of the heated container body. (Patent Document 1)

As another conventional example, in a hot water supply apparatus of a beverage production machine, a plurality of spare tanks are provided as means for heating water supply for continuous sale of beverages, heating is sequentially increased for each spare tank, and the final spare tank is set to a set temperature. There was a thing. (Patent Document 2)
Japanese Patent Laid-Open No. 01-200133 JP 2003-296812 A

  However, the structure of Patent Document 1 has a complicated structure and a large electric capacity. In addition, in the case of heating to raise water from the introduction port on the inner wall side lower surface, water is heated at 100 ° C. or more in a narrow gap of several mm, and the hot water supply from the raised position to the lower discharge port is lowered. Therefore, the boiling water tends to proceed to the rising side, and has a problem that it does not drop easily. Moreover, since the hot water outlet is on the upper surface side, handling is inconvenient.

  In Patent Document 2, since the heating means is dispersed at a plurality of locations, the electrical circuit is complicated, the overall structure of the apparatus is increased, the cost is increased, and the electrical capacity is increased.

  In addition, when tap water used in these water heaters is repeatedly subjected to high-temperature heating for a long time, the water channel becomes narrow due to adhesion and accumulation of foreign matter such as scale and lime in the hot water pipe (diameter: several mm). Therefore, it has been difficult to perform sanitary treatment maintenance, cleaning work, repair work, and the like.

  An object of the present invention is to solve the above-mentioned problems, and to provide an electric instantaneous water heater that can save power and reduce the size and weight, and facilitate the maintenance and cleaning of a water pipeline.

  The first problem-solving means of the present invention has a bottomed bottom provided with an upper wide truncated cone-shaped hole on the inner side, an upper wide conical recess serving as a bottom at the lower end thereof, and a hot water supply outlet provided through the center of the recess. A cylindrical heat conductive container body and a spacer body having a thin-cylindrical cylindrical body that is fitted inside the hole of the container body and has a plurality of circularly equidistant intervals that continue downward from the top. A thermally conductive spacer having a water channel notch and the inner surface of the upper frustoconical hole of the container body depending on the thickness of the spacer up to a position where the upper part of the water channel notch of the spacer is exposed to the upper side inside the spacer A thermally conductive core fitted so as to leave an extremely thin gap due to the water channel notch, a first heating element wound around an outer peripheral surface of the container body corresponding to the ultrathin gap, and a bottom of the container body A second heating element wound around the hot water outlet of the A circumferential groove that is provided at a boundary between a container body around which the first heating element is wound and a container body bottom portion around which the second heating element is wound, and is deeper than an outer peripheral surface around which the first heating element is wound A heat insulating cover that covers the lower surface and the outer periphery of the container body, a heat insulating cover that detachably covers the upper surface of the heat insulating cover, a valve and a watering nozzle that are connected to a water supply pipe that passes through the heat insulating cover, And a hot water pipe connected to the hot water outlet.

  The second problem-solving means of the present invention is a bottomed structure in which an upper wide truncated cone-shaped hole is provided on the inner side, an upper wide conical recess serving as a bottom is formed at the lower end thereof, and a hot water supply outlet is provided through the center of the recess. It has a cylindrical heat conductive container body and an upper wide frustoconical cylindrical core body fitted inside the hole of the container body, and there are a plurality from the upper end edge to the lower end of the outer periphery of the core body. A thermally conductive core that is formed so as to leave a very thin gap between the inner surface of the upper frustoconical hole of the container main body according to the depth of the water channel groove, and formed with equally spaced water channel grooves, A first heating element wound around the outer peripheral surface of the container main body corresponding to the thin gap, a second heating element wound around the hot water outlet at the bottom of the container main body, and the first heating element are wound. Provided at the boundary between the mounted container body and the container body bottom on which the second heating element is wound, and the first heating element is wound. A circumferential groove deeper than the outer peripheral surface formed, a heat insulating cover covering the lower surface and the outer peripheral portion of the container body, a heat insulating cover that detachably covers the upper surface of the heat insulating cover, and a water supply pipe passing through the heat insulating cover And a water nozzle connected to the hot water outlet, and a hot water pipe connected to the hot water outlet.

  According to a third problem solving means of the present invention, in addition to the first problem solving means, the spacer has the water channel notch formed from a heat conductive thin plate by pressing or the like, and the whole is coupled in a cylindrical shape, and the water channel notch That is, a skewer-like portion is formed at the boundary.

  According to a fourth problem solving means of the present invention, in addition to the first problem solving means, the core has an upper frustoconical cylindrical shape so that the core can be fitted into the upper frustoconical hole of the container body and the inside of the spacer. It has a core body, and a handle is provided at the center of the top surface.

  According to a fifth problem solving means of the present invention, in addition to the second problem solving means, the core is a core body of a cylindrical body having an upper frustoconical shape so that the core can be fitted inside the upper frustoconical hole of the container body. The handle is provided at the center of the top surface.

  The sixth problem solving means of the present invention is that, in addition to the fourth or fifth problem solving means, a substantially Yamakasa-shaped portion is formed on the upper surface of the core body.

  The seventh problem solving means of the present invention is that, in addition to the fourth or fifth problem solving means, a chamfer is provided on the outer periphery of the lower end portion of the core body.

  The eighth problem solving means of the present invention is that, in addition to the fifth problem solving means, a chamfer is provided on the outer periphery of the upper end portion of the core body.

  The ninth problem solving means of the present invention is that, in addition to the first or second problem solving means, the water supply valve in the middle of the water supply pipeline is opened by an electrical signal so that the water supply is supplied for a certain period of time.

  In the tenth problem solving means of the present invention, in addition to the first or second problem solving means, in an extremely narrow gap serving as the water supply channel, the first heating element maintains an intermediate temperature, and In the range of the wide conical recess at the bottom of the container body, the temperature is controlled by the control device by each temperature sensor so as to reach a specified temperature slightly lower than the evaporation temperature by the second heating element.

  According to an eleventh problem solving means of the present invention, in addition to the first or second problem solving means, the heat insulating cover is divided into two so as to cover the outer cylinder portion and the lower surface portion of the container main body, and one and the other cover cover the entire container main body. And a support base for supporting and fixing both covers integrally is provided.

  According to a twelfth problem solving means of the present invention, in addition to the first or second problem solving means, a spiral groove is formed in an outer circumferential portion of the container body, and the first heating element is wound therein. That is.

  The thirteenth problem solving means of the present invention is that, in addition to the first, second or twelfth problem solving means, the first and second heating elements are coated and fixed with heat transfer cement.

  According to the first or second problem solving means, the configuration of the apparatus is simplified, the container main body is downsized, the electrical configuration is also compact, and power is saved. In addition, it is easy to handle and can be installed in tight spaces. In addition, maintenance and cleaning of the water pipeline has become easier. That is, the thermally conductive spacer is fitted into the upper frustoconical hole of the container body, and the core body is fitted inside the spacer. Therefore, since the inner cylinder diameter of the container body is expanded and the upper side constitutes an open part, it is extremely easy to detach the core body upward, and the container body inner cylinder diameter and the core body / spacer Such as cleaning can be performed efficiently and is hygienic. In addition, since the hole of the container main body, the thermally conductive spacer and the core main body basically have an upper truncated cone shape, it is easy to make the water channel formed between them a very narrow gap.

  The following effects are exhibited by the third problem solving means. In the spacer, the water channel notch is formed from a heat conductive thin plate by pressing or the like, and the whole is joined in a cylindrical shape, and a skewer-like portion is formed at the boundary of the water channel notch. Accordingly, the spacer can be easily manufactured.

  The following effects are exhibited by the fourth and fifth problem solving means. The core has an upper wide truncated cone-shaped cylindrical core body, and a handle is provided at the center of the upper surface thereof. Therefore, if the handle is held, the core body can be easily attached and detached.

  The sixth effect solving means exerts the following effects. A substantially Yamakasa-shaped portion is formed on the upper surface of the core body. Accordingly, the supplied water is dispersed in a range of 360 degrees along a substantially Yamakasa-shaped inclined surface on the upper surface of the core body through a watering nozzle, and a plurality of equidistant waterway notches in the spacer make a truncated cone on the container body. Divided evenly into the inner shape and descends toward the hot water outlet.

  The seventh problem solving means exerts the following effects. A chamfer is provided on the outer periphery of the lower end of the core body. Therefore, heat conduction from the second heating element to the core body is interrupted, and the hot water is likely to fall smoothly into the recess at the bottom of the container body.

  The eighth problem solving means exerts the following effects. A chamfer is provided on the outer periphery of the upper end of the core body. Therefore, the supplied water is dispersed in the range of 360 degrees along the upper surface of the core body through the watering nozzle, and is reliably introduced into a plurality of equally spaced waterway grooves.

  The ninth effect solving means exhibits the following effects. The water supply valve in the middle of the water supply pipe is opened by an electrical signal, and the water supplied for a certain period of time is distributed in a range of 360 degrees along the upper surface of the core body through the watering nozzle, and is formed by a plurality of equally spaced waterway notches in the spacer. The water is evenly divided into the inner surface of the truncated cone shape of the container body and descends toward the hot water outlet. Therefore, even if the inner area of the container main body of the water supply pipe line is expanded on the upper side, there is an effect that a certain amount of water supply can be secured without changing the hot water supply amount by adjusting the time with the electric signal of the water supply valve. .

  The tenth problem solving means exerts the following effects. The water supplied for a certain period of time passes through the notch, which is a thin skewer-like band with an extremely narrow gap, and the water becomes a boundary film by heat conduction between the container body heated by the heating element and the core. It becomes a state of heat transfer and can be warmed up instantly. And only the specified amount is obtained when the hot water at the specified temperature is required.

  The eleventh problem solving means exerts the following effects. A lower support base is provided that covers the whole with one and the other cover of the heat insulating cover divided into two so as to cover the container main body outer cylinder part and the lower surface part, and supports and fixes both covers together. Therefore, the dangerous part of the heat generating body of the container main body outer cylinder part and the heat generating body of the lower surface part of the main body is covered with the two-part heat insulating cover, and both covers are integrally restrained by the support base, and safety can be ensured. Moreover, it becomes easy to install a cup that receives hot water from the hot water outlet side by the support base.

  The twelfth problem solving means exerts the following effects. When the first heating element is spirally wound around the outer circumferential portion of the container body, it can be wound along the spiral groove, so that the operation can be performed easily and quickly.

  The thirteenth problem solving means exerts the following effects. A first heating element is spirally wound around the outer circumferential portion of the container body, and a second heating element is wound at a position adjacent to the outlet conduit at the bottom of the container body. These heating elements are coated and fixed with heat transfer cement for protection after winding. Therefore, induction heat efficiency is improved, electric capacity can be reduced, and there is an energy saving effect.

  Below, the embodiment of the electric instant water heater concerning this invention is described based on one Example shown in drawing. 1-3, first, the outline of the device of the present invention is as follows. In the upper part of the apparatus, a water supply valve Q1 and a watering nozzle 513 are connected to a water supply line 514 penetrating the heat insulating lid. At the lower part of the apparatus, a hot water pipe 105 and a hot water supply valve Q2 are connected to the hot water supply outlet, and a cup C is placed immediately below.

  In the middle part of the apparatus, an upper wide frustoconical hole 103 is provided inside the bottomed cylindrical heat conductive container main body 101, and the lower end thereof is a bottom formed with an upper wide conical recess 104, and the center of the recess The hot water supply outlet pipe 105 is connected through. Inside the hole of the container main body, a thermally conductive spacer main body 201 having a thin cylindrical body having an upper frustoconical shape and having a plurality of water channel notches is fitted. A thermally conductive core 300 is fitted inside the spacer 200 so as to leave an extremely thin gap between the inner surface of the upper frustoconical hole depending on the thickness of the spacer.

  A first heating element A (seeds heater) is wound around the outer peripheral surface of the container body 101 corresponding to the ultra-thin gap. A second heating element B is wound around the hot water supply outlet pipe 105. And the lower surface and outer peripheral part of the said container main body are covered with the heat insulation cover 500, and the upper surface of this heat insulation cover is detachably covered with the heat insulation cover 509.

  Now, this will be described in detail below. 4 and 5, a cylindrical hole 102 is formed at the upper end of the container body 101, an upper frustoconical hole 103 is formed at the lower end thereof, and an upper conical concave portion 104 having a V-shaped cross section is formed at the lower end thereof. To form the bottom. A hot water supply outlet pipe 105 is connected to the center outer side of the bottom, and a pipe screw 106 is provided on the pipe 105 to attach a hot water supply valve Q2.

  A spiral groove 108 around which the first heating element A is wound is formed in the outer circumferential portion 107 of the container body 101. Further, in the vicinity of the hot water supply outlet pipe 105 of the container main body lower surface portion 111 shown in FIG. 5, a lower face groove 112 is formed in an arc shape centering on the outlet pipe 105, and the second heating element B (seeds heater) is provided. It is wound. A circumferential groove 110 deeper than the spiral groove 108 is formed at the boundary between the container body 101 around which the first heating element A is wound and the container body bottom 109 around which the second heating element B is wound. (The thickness between the groove bottom and the inner surface of the hole 103 is reduced, and the thickness required for the groove processing is determined as a minimum). Thereby, the heat conduction to the container body 101 by the second heating element B is blocked.

  1 and 3, in order to wind the first heating element A around the spiral groove 108, the heater wire A 'is sequentially wound from one of the heater wires A' of the heating element A, and then each heater wire is wound. The A ′ terminals are gathered at the lower end and connected to a control device (not shown) arranged outside the container 100. In FIGS. 6 and 7, a commercially available heat transfer cement 113 is filled in the space where the first heating element A is wound.

  Next, in order to wind the second heating element B around the lower surface groove 112 of the lower surface 111 of the container body 101, after winding one of the heater wires B ′ of the heating element B around the bottom surface groove 112, both terminals are connected to the container 100. Is connected to a control device (not shown) arranged outside. The heat transfer cement 113 is filled in the gap where the second heating element B is wound. This heat transfer cement 113 is a putty-like non-metallic and inorganic cement with high thermal conductivity, so when it is filled in the winding gap between the heating elements A and B, the heat transfer area is greatly expanded and energy saving is achieved. Effective for countermeasures.

  Next, as means for controlling the first heating element A, a thermocouple temperature sensor terminal 114a is screwed to the upper side surface of the container body 101 with screws 115 on the surface side around which the heating element A is wound in FIG. The And the temperature management (medium temperature 60 degreeC-70 degreeC) of the 1st heat generating body A is controlled by a control apparatus (not shown).

  Similarly, in the vicinity of the position where the second heating element B is wound, the thermocouple temperature sensor terminal 114 b is screwed to the lower surface of the heat insulating cover 500 with a screw 115. And the temperature management (regulated temperature 97-99 degreeC) of the 2nd heat generating body B is controlled by a control apparatus.

  Although the material of the said container main body 101 is ADC5 (aluminum material) in an Example, if it is a grade of a heat conductive material, it will not be limited. The surface of the aluminum material is given a surface hardness by anodizing.

  10 and 11, the spacer 200 is made of a thin-walled heat conductive material and has a spacer body 201 of a thin cylindrical body having an upper frustoconical shape so that the spacer 200 can be fitted into the upper frustoconical hole 103 of the container body. A portion having a width of about 1/7 to about 1/4 of the axial length at the upper portion of the spacer body 201 is a ring portion 202. From the lower side, a plurality of water channel notches 203 are formed at equal intervals in the circumferential direction, and a skewer-like portion 204 is formed at the boundary.

  Although the heat conductive spacer 200 of a present Example consists of stainless steel material, if a material type is heat conductivity, it will not specifically limit. In addition, the thickness of the skewered portion 204 of the spacer 200 can be selected in the range of 0.2 mm to 0.25 mm, and the heat transfer efficiency from the heating element can be measured. That is, since water passes through such an extremely thin water channel, it becomes a state of “boundary film heat transfer”, and heat conduction efficiency close to 100% becomes possible. As an example of the manufacturing method, a notch 203 is formed on a very thin stainless steel plate by pressing or the like, and the whole is joined in a cylindrical shape.

  8 and 9, the core body 300 </ b> A has an upper frustoconical cylindrical core body 300 </ b> A so that the container body can be fitted into the upper frustoconical hole 103 of the container body and the spacer 200. have. A substantially Yamakasa-shaped portion 301 is formed on the upper surface portion of the core body, and a handle 302 is provided at the center of the upper surface. Holding this handle 302 makes it easy to attach and detach the core body 300A. The thermally conductive core 300 is fitted inside the spacer 200 to a position where the upper part of the water channel notch 203 of the spacer is exposed to the upper side. Thereby, an extremely thin gap due to the water channel notch is left between the inner surface of the upper frustoconical hole of the container body 101 depending on the thickness of the spacer 200.

  In addition, a hollow portion 304 is provided from the lower surface side of the core body 300A, so that the efficiency of heat transfer from the heating element (increased temperature increase rate due to a decrease in heat capacity) is achieved. Further, a chamfer 305 is provided on the outer periphery of the lower end portion of the core main body 300A to cut off heat conduction from the second heat generating element B on the lower surface side, thereby facilitating smooth lowering of the hot water to the concave portion 104.

  Next, the assembly order of each component will be described with reference to FIGS. In this case, the 21st heat generating body A by the side of the outer periphery 107 of the container main body 101 and the 2nd heat generating body B by the side of the lower surface part 111 are already assembled. On the upper surface of the support base top plate 401, one side 501 and the other cover 502 of the heat insulating cover 500 divided into two parts are entirely covered so as to cover the outer peripheral portion 107 and the lower surface portion 111 of the container main body 101. 502 is attached in a state of being supported and fixed integrally, and is fixed to the lower surface portion 111 with a bolt 403 penetrating the top plate 401. Further, a band 503 is wound around the lower part of the outer periphery of the heat insulating cover 500, and a band 504 is wound around the upper part.

  In these assembling, when the whole of the heat insulating cover 500 divided into two parts is covered with the one 501 and the other 502, the first heating element A, the heater wire A ′, the second heating element B, and the heater wire B ′ are shown in FIG. In this way, they are gathered together at the lower end and led out from the heat insulating cover 500 to be arranged.

  A hot water outlet pipe 105 is connected through the central portion of the container body recess 104, and a hot water supply valve Q2 is attached to the pipe screw 106. The heat insulating cover 500 of this embodiment is a urethane foam material, but may be another heat insulating material.

  Next, the spacer 200 is inserted into the upper frustoconical hole 103 of the container main body, and the core main body 300 </ b> A is fitted inside the spacer 200 with the handle 302. As a result, a water supply channel having an extremely narrow gap is formed by the thickness of the spacer skewer-shaped portion 204 of 0.2 mm and the notch 203.

  Thereafter, the positioning convex portion 508 of the container lid 507 is fitted into the cylindrical hole 102 at the upper end portion of the container main body 101, and the upper heat insulating cover 509 is further mounted thereon to make the container main body 101 a sealing body. Next, in the final assembly stage, the T-shaped support 510 is attached to the position of the upper side band 504 with the bolt 511. A water supply valve Q1 is fixed to the upper side, and a water supply filter 512 and a primary water supply pipe 515 are sequentially connected to the inlet side. The watering nozzle 513 is attached to the outlet side of the water supply valve Q1, and the electric instantaneous water heater is completed.

  The operating state of the embodiment will be described. The currents to the first heating element A and the second heating element B are always energized intermittently by opening and closing the ON-OFF switch, and are kept at a specified temperature by the control device. 1 and 3, when a hot water supply operation button of a control device (not shown) is pressed, a timer signal is generated instead of an electric signal, the water supply valve Q1 of the primary water supply pipe receives a signal, and the open state is activated by a timer. During this time, a specified amount of water is sent. When the timer setting of the control device expires, the water supply valve Q1 is switched to the closed state, and the water supply is shut off.

  In parallel with this, the water supply is distributed in the range of 360 degrees along the inclined surface of the substantially Yamakasa shaped portion 301 of the core body through the watering nozzle 513. Then, a water flow in the form of a film is formed by the water channel notch 203 of the spacer, and is temporarily stored in the concave portion 104 at the bottom while being evenly divided inside the frustoconical hole of the container body. In this descending range, the container main body 101, the spacer 200, and the core main body 300A by the first heat body A are heat storage bodies (heating element temperature is medium temperature 60 ° C. to 70 ° C.), so the water supply is warmed. Descent.

Here, when the temperature of the feed water is raised to 100 ° C. or more at a stretch, it boils and flows backward to the inlet side. Therefore, here, the control of the temperature management is performed by the control device in accordance with a signal from the temperature sensor 114a so as to obtain an appropriate intermediate temperature (60 ° C. to 70 ° C.).

  Further, due to the conduction heat of the second heating element B near the hot water outlet, the concave portion 104 and the hot water outlet pipe 105 at the bottom of the container body are at a high temperature (specified temperature of 97 ° C. to 99 ° C.). For this reason, the hot water temporarily stored in the recess 104 is further converted to a high temperature water.

  As a means for shutting off the excessive temperature rise of the heated hot water, the hot water supply valve Q2 is managed and controlled by the control device in accordance with a signal from the temperature sensor terminal 114b so as to reach a specified temperature (97 ° C. to 99 ° C.). The Further, a circumferential groove 110 is provided at the lower end of the outer circumferential portion 107 of the container body 101, and a chamfer 305 is provided in the core body to conduct the conduction heat of the second heating element B to the upper side. Shut off.

  When hot water at the specified temperature is required, if a hot water lamp (not shown) of the control device is lit, an electric timer signal is output when the hot water operation button is pressed, and the hot water supply valve Q2 is set for the timer set time. Opens and the specified amount of hot water is released. At this time, a prescribed amount of hot water is poured into the cup C under the top plate 401 of the support base. In this way, it can be used for applications such as coffee, soup and tea.

  FIG. 12 shows a second embodiment, in which the spiral groove 108 around which the first heating element A is wound is omitted, and is wound directly on the outer peripheral surface of the container body 101. That is, after winding along the upper part in order from one side of the heater wire A of the first heating element A on the outer circumferential surface 107, both ends of the heater wire A are gathered in the same manner as described above. Accordingly, it is possible to omit the labor for processing the spiral groove. An upper surface groove 500a is provided on the upper surface of the bottom of the heat insulating cover 500, and the second heating element B is wound in the upper surface groove 500a. The heat transfer cement 113 is filled in the gap around which the heating element is wound.

  FIG. 13 shows a third embodiment, in which the spacer 200 is omitted and the manufacturing effort is omitted. That is, a chamfered portion 306 is provided at the upper edge of the outer circumferential surface 303 of the core body, a plurality of equally spaced vertical water channel grooves 303A are provided from the lower end, and the groove depth is 0.2 to 0.25 mm. To do. The water supplied by the chamfer 306 is dispersed in a range of 360 degrees along the upper surface of the core body through the watering nozzle, and is reliably introduced into a plurality of equally spaced waterway grooves. FIG. 14 shows a fourth embodiment, in which a spiral water channel groove 303B is used instead of the vertical water channel groove 303A of the third embodiment shown in FIG.

  The present invention is not limited to the examples and embodiments described above, and includes various modifications without departing from the scope and scope of the claims.

  The electric instant water heater of the present invention is used for supplying beverages such as coffee, soup and tea.

It is a fragmentary sectional front view of one example of the present invention. It is a top view of FIG. It is an exploded view of the whole apparatus. It is a fragmentary sectional front view of a container. It is a bottom view of a container. It is the elements on larger scale of FIG. It is the elements on larger scale of FIG. It is a front view of a core. It is a bottom view of a core. It is a top view of a spacer. It is a front view of a spacer. It is a fragmentary sectional front view of the 2nd example of the present invention. It is a fragmentary sectional front view of the 3rd example of the present invention. It is a fragmentary sectional front view of the 4th example of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Container 101 Container main body 102 Cylindrical hole 103 Upper wide frustoconical hole 104 Upper wide conical recessed part 105 Hot water supply outlet pipe 106 Pipe thread 107 Outer circumferential part 108 Spiral groove 109 Container bottom part 110 Round groove 111 Lower face 112 Lower face groove 113 Heat Transfer Cement 114a, b Temperature Sensor 115 Screw 200 Thermal Conductive Spacer 201 Spacer Main Body 202 Ring Part 203 Notch 204 Sawtooth Body 300 Core 300A Main Body 301 Substantially Yamakasa Shaped Part 302 Handle 303 Outer Tube Part 303A Vertical Groove 303B Spiral Groove 304 Cavity part 305 Chamfering part 306 Chamfering part 400 Support base 401 Top plate 402 Leg 403 Bolt 500 Thermal insulation cover 501 One thermal insulation cover on the right side 502 Thermal insulation cover on the left side 503 Lower band 504 Upper band 505 Fastening hole 506 Bolt 5 7 Container lid 508 Positioning convex portion 509 Upper heat insulating cover 510 T-shaped support 511 Bolt 512 Water supply filter 513 Watering nozzle 514 Water supply line 515 Primary water supply pipe A First heating element A 'Heater wire of first heating element B Second heating element B 'Heater wire of second heating element Q1 Water supply valve (solenoid valve)
Q2 Hot water supply valve (solenoid valve)
C cup

Claims (13)

A bottomed cylindrical thermally conductive container body provided with an upper wide frustoconical hole on the inside, an upper wide conical recess serving as a bottom at the lower end thereof, and a hot water supply outlet provided through the center of the recess;
A thermally conductive spacer that is fitted inside the hole of the container body, has a thin cylindrical body having an upper frustoconical shape, and has a plurality of water channel notches formed at equal intervals in the circumferential direction continuing downward from the upper part. When,
Inside the spacer, the spacer is fitted to leave a very thin gap due to the channel notch between the inner surface of the upper frustoconical hole of the container body until the position where the upper part of the channel notch of the spacer is exposed to the upper side. Combined thermal conductive core,
A first heating element wound around the outer peripheral surface of the container body corresponding to the ultra-thin gap;
A second heating element wound around a hot water outlet at the bottom of the container body;
A circle deeper than the outer peripheral surface around which the first heating element is wound, provided at the boundary between the container body around which the first heating element is wound and the bottom of the container body around which the second heating element is wound. The circumferential groove,
A heat insulating cover covering the lower surface and outer periphery of the container body;
A heat insulating cover that detachably covers the upper surface of the heat insulating cover;
A valve and a watering nozzle connected to a water supply pipe passing through the heat insulating lid;
An electric instantaneous water heater comprising a hot water pipe connected to the hot water outlet. A bottomed cylindrical thermally conductive container body provided with an upper wide frustoconical hole on the inside, an upper wide conical recess serving as a bottom at the lower end thereof, and a hot water supply outlet provided through the center of the recess;
It has a cylindrical core body with an upper frustoconical shape fitted inside the hole of the container body, and a plurality of equally spaced waterway grooves are formed from the upper end edge to the lower end of the outer periphery of the core body, A thermally conductive core fitted so as to leave an extremely thin gap between the inner surface of the upper frustoconical hole of the container main body according to the depth of the water channel groove;
A first heating element wound around an outer peripheral surface of the container body corresponding to the ultra-thin gap;
A second heating element wound around the hot water outlet at the bottom of the container body;
A circle deeper than the outer peripheral surface around which the first heating element is wound, provided at the boundary between the container body around which the first heating element is wound and the bottom of the container body around which the second heating element is wound. The circumferential groove,
A heat insulating cover covering the lower surface and outer periphery of the container body;
A heat insulating cover that detachably covers the upper surface of the heat insulating cover;
A valve and a watering nozzle connected to a water supply pipe passing through the heat insulating lid;
An electric instantaneous water heater comprising a hot water pipe connected to the hot water outlet. The spacer is characterized in that the water channel notch is formed from a heat conductive thin plate by pressing or the like, the whole is coupled in a cylindrical shape, and a skewer portion is formed at the boundary of the water channel notch. The electric instant water heater according to 1. The core has an upper wide frustoconical hole in the container main body, and an upper wide frustoconical cylindrical core body so that it can be fitted inside the spacer, and a handle is provided at the center of the upper surface thereof. The electric instant water heater according to claim 1. The core has an upper wide truncated cone-shaped cylindrical core body so that the core body can be fitted inside the upper wide truncated cone-shaped hole, and a handle is provided at the center of the upper surface thereof. The instant electric water heater according to claim 2. 6. The electric instantaneous water heater according to claim 4, wherein a substantially Yamakasa-shaped portion is formed on an upper surface of the core body. The electric instant water heater according to claim 4 or 5, wherein a chamfer is provided on an outer periphery of a lower end portion of the core body. 6. The electric instantaneous water heater according to claim 5, wherein a chamfer is provided on an outer periphery of an upper end portion of the core body. The electric instantaneous water heater according to claim 1 or 2, wherein a water supply valve in the middle of the water supply line is opened by an electric signal so that water is supplied for a certain period of time. In the range of the extremely narrow gap serving as the water supply channel, the intermediate temperature is maintained by the first heating element, and in the range of the wide conical recess at the bottom of the container body, the second heating element causes 3. The electric instant water heater according to claim 1 or 2, wherein the electric water heater is controlled by a control device by each temperature sensor so as to reach a slightly lower specified temperature. The heat insulating cover is divided into two parts so as to cover the container body outer cylinder part and the lower surface part, and the whole container body is covered with one and the other cover, and a support base for supporting and fixing both covers integrally is provided. The electric instant water heater according to claim 1 or 2. The electric instantaneous water heater according to claim 1 or 2, wherein a spiral groove is formed in an outer circumferential portion of the container body, and the first heating element is wound therein. 13. The electric instant water heater according to claim 1, 2 or 12, wherein the first and second heating elements are coated and fixed with heat transfer cement.

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