JP2005160756A - Electric water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric water heater facilitating the installation of appliances, simplifying the water supply from a water storage tank to a vessel and reducing the cost. <P>SOLUTION: The water storage tank 13 is detachably installed on a supply water receiving plate 20 to be mounted above a body 11, and the water supply receiving plate 20 and the vessel 14 are made to communicate with a water supply passage 17. The water storage tank 13 is positioned above the body 11, which reduces the installation area of the appliances and facilitates the installation of the appliances are facilitated; and the water of the storage tank 13 can be supplied by the dead weight without using a water supply pump to simplify the water supply and reduce the cost. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electric water heater equipped with a water storage tank for supplying water to a container in a main body.

  Conventionally, as this kind of electric water heater, for example, a water storage tank is provided in addition to the main body, and when the hot water in the container is reduced to a predetermined amount, it is detected, and the water in the water storage tank is pumped up by a water supply pump. In some cases, water is automatically supplied to the container via a water supply path connecting the water tank and the water storage tank (for example, see Patent Document 1).

Specifically, as shown in FIG. 5, a water storage tank 3 provided in the main body 1 and containing water 2, a container 4 provided in the main body 1 for containing and heating water 2, and water 2 in the container 4 are arranged. Heating means 5 for heating, water level sensor 6 having three water level detecting elements 6 a to 6 c for detecting the amount of water in the container 4, a water supply path 7 connecting the container 4 and the water storage tank 3, and water in the water storage tank 3 The feed water pump 8 for pumping 2 and the pumping path 9 were constructed. And when the water 2 in the container 4 decreases, the water supply pump 8 is operated by the detection of the water level sensor 6, and the water 2 is automatically replenished to the container 4 through the pumping path 9 and the water supply path 7.
JP-A-5-293046

  However, in the conventional configuration, since the water storage tank 3 is provided in the main body 1, the installation area of the equipment including the main body 1 and the water storage tank 3 is increased, and there is a problem that the installation place is troubled. Moreover, since the water in the water storage tank 3 is pumped up by the water supply pump 8 and automatically supplied to the container 4, there is a problem that the number of components increases and the cost is high.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide an electric water heater that simplifies water supply from a water storage tank to a container and reduces costs while facilitating equipment installation.

  In order to solve the above-mentioned conventional problems, the electric water heater of the present invention has a water storage tank detachably installed on a water supply tray and placed above the main body, and the water supply tray and the container are communicated by a water supply channel. It is.

  As a result, the water storage tank is located above the main unit, reducing the equipment installation area, facilitating equipment installation, and using the water in the water storage tank without using a water supply pump. It can be replenished, simplifying water supply and reducing costs.

  The electric water heater of the present invention can facilitate the installation of equipment and can simplify the water supply from the water storage tank to the container and reduce the cost.

  1st invention is the water storage tank which accommodates water, the container which accommodates water provided in a main body, the heating means which heats the water in the said container, the water supply tray provided in the upper part of the said main body, A water supply channel that connects the water supply tray and the container, and the water storage tank is an electric water heater that is detachably installed on the water supply tray and placed above the main body. Because it is located above, the installation area of the equipment is reduced, facilitating equipment installation, and the water in the storage tank can be replenished to the container by its own weight without using a water supply pump, etc. Simplification and cost reduction can be achieved.

  In the second invention, in particular, in the first invention, the air layer above the inside of the water storage tank is sealed, so that the air enters the water storage tank only at the opening to the water receiving tray of the water storage tank. If the opening is submerged in the water supply due to the weight of the water from the storage tank, the water supply will stop at the same time as the entry of air into the storage tank stops, preventing overflow due to oversupply. .

  According to a third aspect of the invention, in particular, in the first or second aspect of the invention, the water storage tank is set to the full water level of the water stored in the container at the bottom end surface on the side of the water supply tray when installed in the water supply tray. If the bottom end of the water tank's water tray is submerged during the water supply due to the weight of the water from the water tank, the water supply will stop, and the water supply will be stopped at the full water level without detecting the amount of water contained in the container. be able to.

  According to a fourth aspect of the invention, in particular, in any one of the first to third aspects of the invention, the water storage tank has a water stop valve that opens and closes the opening when the water storage tank is opened and closed. It closes the opening and opens when worn, thereby preventing water leakage when the water storage tank is removed.

  According to a fifth aspect of the invention, in particular, in any one of the first to fourth aspects of the invention, the water supply tray has a water supply valve that opens and closes a communication port with the water supply path when the water storage tank is attached and detached, thereby removing the water tank. Occasionally the communication port is closed and opened when worn, so that even if the water storage tank is removed, it can be used only by the main body, and water leakage when the main body falls can be prevented.

  According to a sixth aspect of the present invention, in particular, in the fourth or fifth aspect of the invention, the water stop valve and the water supply valve are opened and closed in conjunction with each other when the water storage tank is attached to and detached from the water supply tray. Sometimes the water stop valve and the water supply valve work together to close the opening and communication port, and when it is worn, it opens, and the components are simplified to prevent water leakage when the water storage tank is removed. be able to. Moreover, even if the water storage tank is removed, it can be used only by the main body, and water leakage when the main body falls can be prevented.

  In a seventh aspect of the invention, in particular, in any one of the first to fourth aspects of the invention, the water supply path is provided with a switching valve that communicates with the water supply tray, so that the switching valve is opened and closed during the water supply, and the state of the device Accordingly, the water supply by the dead weight of the water from the water storage tank can be controlled. In addition, the hot water in the container is always maintained at a high temperature even immediately after being supplied by limiting the amount of water supplied from the water storage tank to the container at low temperatures by intermittently repeating water supply and stoppage. Can do. Furthermore, the hot water to be discharged can always be kept at a high temperature by stopping the supply of the low temperature water supplied from the water storage tank to the container while the hot water in the container is being discharged.

  According to an eighth aspect of the invention, in particular, in the seventh aspect of the invention, the switching valve is controlled by a water level sensor that detects the amount of water in the container, thereby opening and closing the switching valve during water supply by the amount of water contained in the container. It is possible to control the water supply by the dead weight of the water from the water storage tank.

  According to a ninth aspect of the invention, in particular, in the seventh or eighth aspect of the invention, the water supply path is provided with a flow rate sensor on the downstream side of the switching valve, so that the flow rate sensor detects the flow rate flowing through the water supply path, It is possible to control the water supply by opening and closing the switching valve to make the amount of water supplied by the weight of the water from the water storage tank constant.

  In a tenth aspect of the invention, in particular, in any one of the first to ninth aspects, the water storage tank is divided into a tank main body and a tank lid, and the space between them is hermetically sealed with an elastic member. Sometimes the tank lid is removed to clean the inside of the water storage tank, and the water storage tank can be easily assembled after cleaning, eliminating the need for maintenance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 and 2 show an electric water heater according to Embodiment 1 of the present invention.

  As shown in the figure, a container 14 for containing water 12 is provided in a main body 11, is formed in a bottomed cylindrical shape with a stainless steel plate, and heating means 15 for heating the water 12 in the container 14 on the bottom side. Is fixed. The rated power consumption of the heating means 15 is 1000 W, and 75 W when keeping warm. One lead-out path 27 communicates with a water receiving port 14b provided at the bottom of the container 14 via a pump 26, and is a path through which the pump 26 is operated to discharge hot water to the outside of the main body 11 at the time of hot water. The control means 31 controls the operation of the device, and controls the heating means 15 and the pump 26. The lid 28 covers the upper opening of the container 14 and is attached to the main body 11 so as to be rotatable.

  The water storage tank 13 is detachably mounted above the main body 11 and stores water for supplying water 12 to the container 14. The water storage tank 13 is composed of a tank body 13d and a supply cap 13f. The tank body 13d is blow-molded with polypropylene resin, and the supply cap 13f is injection-molded with polypropylene resin. The replenishment cap 13f can be removed from the tank main body 13d, and is sealed with silicone rubber or the like so that the water 12 does not leak from the coupling portion when attached. The opening 13c provided on the top surface of the replenishing cap 13f is provided with a water stop valve 21 that is biased by a spring 29 and opens / closes the opening 13c when the water storage tank 13 is attached / detached. The water stop valve 21 is made of a soft rubber such as silicone rubber so that the water 12 does not spill out from the opening 13c when the water tank 13 is removed, such as when the water tank 13 is to be replenished. It is a thing. When the water storage tank 13 is mounted on the main body 11, the water stop valve 21 urged by the spring 29 to close the opening 13 c is lifted, and the opening 13 c is opened. This is a mechanism in which the water 12 contained in the water comes out from the opening 13c.

  The water supply tray 20 provided at the upper part of the main body 11 is installed with the water storage tank 13 detachably fitted thereto, and the water 12 flowing out from the opening 13c when the water storage tank 13 is attached to the main body 11 is provided. It is what you receive. A communication port 20 a provided on the bottom surface of the water supply tray 20 is provided with a water supply valve 22 that is biased by a spring 30 and opens and closes the communication port 20 a when the water storage tank 13 is attached and detached. The water supply valve 22 is made of a soft rubber such as silicone rubber. When the water storage tank 13 is attached to the main body 11, the water supply valve 22 that is biased to close the communication port 20 a by the spring 30 is provided. Since it is pushed down and the communication port 20a is opened, the water 12 of the water supply tray 20 is introduced from the communication port 20a. In the present embodiment, the water stop valve 21 and the water supply valve 22 are provided to open and close in conjunction with each other, but each valve may be opened and closed independently.

  One of the water supply channels 17 communicates with an inlet 14 c provided at the bottom of the container 14, and the other communicates with a communication port 20 a provided at the bottom of the water supply tray 20. Water 12 is supplied to the container 14 during water supply. This is the route to introduce.

  Further, when the water storage tank 13 is attached to the main body 11, the full water level 14 a of the water 12 that accommodates the opening 13 c (the bottom end surface 13 b of the water storage tank 13) provided on the top surface of the replenishing cap 13 f in the container 14, It is set to be the same height.

  About the electric water heater comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, as shown in FIG. 2, the water storage tank 13 is removed from the main body 11. Then, the water supply tank 13 is replenished with the water supply tank 13 by removing the supply cap 13f from the tank body 13d. When the replenishment is completed, the replenishment cap 13f is attached to the tank main body 13d to return to the original state, and the water storage tank 13 is fitted to the water supply tray 20 provided at the upper part of the main body 11 and installed. When the water storage tank 13 is attached to the main body 11 in this manner, the water stop valve 21 that is urged to close the opening 13c by the spring 29 is lifted, and the spring 30 is urged to close the communication port 20a. The water supply valve 22 is pushed down in conjunction with the water stop valve 21. Thereby, since the opening part 13c and the communication port 20a open, the water 12 accommodated in the water storage tank 13 is introduce | transduced into the water supply path 17 via the water supply receptacle 20, and the dead weight of the water 12 accommodated in the water storage tank 13 is obtained. Thus, water is supplied to the container 14.

  Here, since the water tank 13 has a tank body 13d blow-molded with polypropylene resin, the air layer 13a in the upper part of the water tank 13 is in a sealed state, and the ingress of air into the water tank 13 is stored. Only the opening 13c of the tank 13 can be limited. When the opening 13c is submerged during the water supply from the water storage tank 13, the air supply into the water storage tank 13 stops and the water supply also stops.

  The water 12 supplied into the container 14 is heated to a predetermined temperature and kept warm by the heating means 3 attached to the bottom. When it is desired to discharge the hot water in the container 14, the hot water is led out of the main body 11 from the lead-out path 27 by operating the pump 4.

  Note that a vapor vent hole 28a is provided on the container 14 side of the lid 28, and the steam generated in the container 14 passes from the vapor vent hole 28a through the vapor passage 28c inside the lid body 28 to the main body 11 from the vapor port 28b. Discharged outside.

  As described above, the electric water heater of the present embodiment includes the water supply channel 17 that communicates the water supply tray 20 and the container 14 provided in the upper portion of the main body 11, and the water storage tank 13 is detachably attached to the water supply tray 20. By installing and placing above the main body 11, the water 12 stored in the water storage tank 13 can be supplied to the container 14 by its own weight. This reduces the installation area of the equipment, facilitates equipment installation, allows the water in the water storage tank 13 to be replenished to the container by its own weight without using a water supply pump, etc. Reduction is achieved.

  In addition, the water storage tank 13 is configured such that the air layer 13a above the inside of the water storage tank 13 is hermetically sealed, so that the entry of air into the water storage tank 13 is limited only to the opening 13c of the water storage tank 13, and the water from the water storage tank 13 is When the opening 13c is submerged during the water supply due to its own weight, the air stops entering the water storage tank 13 and the water supply is stopped at the same time, thereby preventing the overflow due to the excessive water supply amount.

  In addition, the water storage tank 13 can be used to supply water by its own weight of the water 12 from the water storage tank 13 by setting the lowermost end surface 13b on the water supply tray 20 side to the full water level 14a of the water 12 accommodated in the container 14 at the time of wearing. When the lowermost end surface 13b on the water supply tray 20 side of the water storage tank 13 is submerged, the water supply is stopped, and the water supply can be stopped at the full water level 14a without detecting the amount of water stored in the container 14.

  In addition, the water storage tank 13 has a water stop valve 21 that opens and closes the opening 13c when the water storage tank 13 is attached and detached, so that the water storage tank 13 closes the opening 13c when the water storage tank 13 is detached and opens when the water storage tank 13 is attached. It is possible to prevent water leakage when the is removed.

  Further, the water supply tray 20 has a water supply valve 22 that opens and closes the communication port 20a with the water supply channel 17 when the water storage tank 13 is attached / detached, thereby closing the communication port 20a when the water storage tank 13 is detached and opening when the water storage tank 13 is attached. That is, even if the water storage tank 13 is removed, the main body 11 can be used alone, and water leakage when the main body 11 falls can be prevented.

  In addition, the water storage tank 13 is provided so that the water stop valve 21 and the water supply valve 22 are opened and closed in conjunction with each other, so that the water stop valve 21 and the water supply valve 22 are interlocked when the water storage tank 13 is removed. The opening 13c and the communication port 20a are closed and opened when the opening 13c is worn. Further, the components can be simplified to prevent water leakage when the water storage tank 13 is removed. Moreover, even if the water storage tank 13 is removed, it can be used only by the main body 11, and water leakage when the main body 11 falls can be prevented.

(Embodiment 2)
FIG. 3 shows an electric water heater according to Embodiment 2 of the present invention. The same elements as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  In the present embodiment, the difference from the first embodiment is that a switching valve 23 that communicates with the water supply tray 20 is provided in the water supply path 17 instead of the water supply valve 22, and the switching valve 23 detects the amount of water in the container 14. The operation is controlled by the sensor 16 and the flow rate sensor 24 is provided on the downstream side of the switching valve 23.

  The water level sensor 16 includes three water level detection elements, a full water level detection element 16a, a water supply level detection element 16b, and a heating stop water level detection element 16c, provided in the lead-out path 27, and each water level detection element includes a light emitting element and a water level detection element. A light receiving element is combined to detect whether or not each water level is reached. The full water level detection element 16 a detects whether or not the amount of water 12 in the container 14 is the full water level 14 a that is the upper limit water level of the water 12 stored in the container 14. The water supply level detection element 16b detects that the amount of water 12 has reached the water supply level 14d at which water supply into the container 14 is started. The heating stop water level detection element 16 c detects that the amount of water 12 has reached the lower limit water level 14 e of the water 12 accommodated in the container 14. The heating stop water level detection element 16c stops the heating operation by the heating means 15 when the water amount of the water 12 reaches the lower limit water level 14e in order to prevent empty cooking, such as when the water supply into the container 14 is not sufficient. It is provided for.

  About the electric water heater comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The replenishment of the water 12 to the water storage tank 13 is the same as in the first embodiment. When the water storage tank 13 is attached to the main body 11, the water stop valve 21 that is urged by the spring 29 to close the opening 13 c is lifted, and the opening 13 c opens, so that the water storage tank 13 is accommodated in the water storage tank 13. Water 12 is introduced into the switching valve 23 through the water supply tray 20.

  Here, based on the detection signal of the water supply detection element 16b, the control means 31 opens the switching valve 23 when the amount of water 12 in the container 14 is equal to or lower than the water supply level 14d. When the switching valve 23 opens, the water 12 stored in the water storage tank 13 is introduced into the container 14 from the water supply channel 17. When the full water level detecting element 16a detects that the water level of the water 12 in the container 14 has reached the full water level 14a, the control means 31 recognizes this and closes the switching valve 23, so that the container for the water 12 The water supply into 14 is stopped.

  In addition, the control method of the water supply amount of the water 12 into the container 14 is not limited to a method in which the water level is detected by the water level sensor 16 and the switching valve 23 is opened and closed according to the detection result. The switching valve 23 may be opened and closed over time to obtain a necessary amount of water. In particular, the hot water in the container 14 is always maintained at a high temperature even immediately after being supplied by limiting the amount of the low-temperature water 12 supplied from the water storage tank 13 to the container 14 by intermittently repeating water supply and stoppage. Can be kept. In addition, while the hot water in the container 14 is being discharged, the hot water 12 to be discharged can always be maintained at a high temperature by stopping the supply of the low-temperature water 12 supplied from the water storage tank 13 to the container 14. it can.

  Here, the flow rate sensor 24 detects the amount of water supplied through the water supply channel 17, and can control the water supply by opening and closing the switching valve 23 during water supply to keep the water supply amount constant.

  As described above, in the electric water heater of the present embodiment, the water supply path 17 is provided with the switching valve 23 communicating with the water supply tray 20 on the upstream side thereof, so that the switching valve 23 is opened and closed during the water supply. It is possible to control water supply by the weight of the water 12 from the water storage tank 13 according to the state.

  In addition, the hot water 12 in the container 14 is always kept at a high temperature even immediately after being supplied by limiting the water supply amount of the low-temperature water 12 supplied from the water storage tank 13 to the container 14 by intermittently repeating water supply and stoppage. Can be maintained.

  Further, by stopping the supply of the low-temperature water 12 supplied from the water storage tank 13 to the container 14 while the hot water 12 in the container 14 is discharged, the hot water to be discharged can always be kept at a high temperature.

  Further, by controlling the operation of the switching valve 23 by a water level sensor 16 that detects the amount of water in the container 14, the switching valve 23 is opened and closed by the amount of water stored in the container 14 to supply water from the water storage tank 13. Water supply by twelve dead weights can be controlled.

  Further, the water supply path 17 is provided with a flow rate sensor 24 on the downstream side of the switching valve 23, whereby the flow rate sensor 24 detects the flow rate flowing through the water supply path 17, and opens and closes the switching valve 23 during water supply to store the water storage tank 13. It is possible to control the water supply with a constant amount of water supplied by the weight of the water 12 from the water.

(Embodiment 3)
FIG. 4 shows an electric water heater according to Embodiment 3 of the present invention. The same elements as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  The present embodiment is different from the first embodiment in that the water storage tank 13 is divided into a tank main body 13d and a tank lid 13e, and the two are hermetically sealed with an elastic member 25. As a result, the tank lid 13e is removed when cleaning the water storage tank 13 to clean the inside of the water storage tank 13, and the water storage tank 13 after cleaning can be easily assembled, thus eliminating the need for maintenance.

  Thus, in the electric water heater of the present embodiment, the water storage tank 13 is divided into the tank main body 13d and the tank lid 13e. Therefore, the tank lid 13e is removed when the water storage tank 13 is cleaned, and the water storage tank 13 is removed. As well as cleaning the inside, the water storage tank 13 can be easily assembled after cleaning, so that care is not required. That is, the path from the water storage tank 13 to the container 14 needs to be cared for in order to prevent the propagation of germs. However, in the case where many components such as a water supply pump are required as in the prior art, the parts are disassembled. There is a problem that it takes time and effort to clean, and it cannot be used unless it is reassembled after cleaning, but this can be solved.

  In addition, the requirements shown in the above-described first to third embodiments can be appropriately combined as necessary to configure an electric water heater, and are not limited to the respective embodiments.

  As described above, the electric water heater according to the present invention can facilitate the installation of the equipment and can simplify the water supply from the water storage tank to the container and reduce the cost. Applicable.

Sectional drawing of the electric water heater in Embodiment 1 of this invention Sectional drawing which shows the state which removed the water storage tank in the electric water heater Sectional drawing of the electric water heater in Embodiment 2 of this invention Sectional drawing of the electric water heater in Embodiment 3 of this invention Sectional view of a conventional electric water heater

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Main body 12 Water 13 Water storage tank 13a Air layer 13b Bottom end surface 13c Opening part 13d Tank main body 13e Tank lid 14 Container 14a Full water level 15 Heating means 16 Water level sensor 17 Water supply path 20 Water supply tray 20a Communication port 21 Water stop valve 22 Water supply valve 22 23 Switching valve 24 Flow sensor 25 Elastic member

Claims (10)

A water storage tank for storing water, a container for storing water provided in the main body, a heating means for heating the water in the container, a water supply tray provided on an upper portion of the main body, the water supply tray and the container An electric water heater, wherein the water storage tank is detachably installed on the water supply tray and placed above the main body. The electric water heater according to claim 1, wherein an air layer above the inside of the water storage tank is sealed. The electric water heater according to claim 1 or 2, wherein when the water storage tank is installed in the water supply tray, the lowermost end surface on the side of the water supply tray is set to a full water level of water stored in the container. The electric water heater according to any one of claims 1 to 3, wherein the water storage tank has a water stop valve that opens and closes an opening when the water storage tank is attached to and detached from the water supply tray. The electric water heater according to any one of claims 1 to 4, wherein the water supply tray has a water supply valve that opens and closes a communication port with the water supply channel when the water storage tank is attached and detached. The electric water heater according to claim 4 or 5, wherein the water stop valve and the water supply valve are opened and closed in conjunction with each other when the water storage tank is attached to or detached from the water supply tray. The electric water heater according to any one of claims 1 to 4, wherein the water supply path is provided with a switching valve that communicates with the water supply tray. The electric water heater according to claim 7, wherein the operation of the switching valve is controlled by a water level sensor that detects the amount of water in the container. The electric water heater according to claim 7 or 8, wherein the water supply path is provided with a flow rate sensor downstream of the switching valve. The electric water heater according to any one of claims 1 to 9, wherein the water storage tank is divided into a tank main body and a tank lid, and the two are hermetically sealed with an elastic member.

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