JP3208129U - Preheating device for hot water storage type electric water heater and hot water storage type electric water heater with preheating device equipped with the preheating device - Google Patents

Abstract

A preheating device for a hot water storage type electric water heater capable of realizing a sufficient amount of hot water supply even if it has been difficult to ensure a sufficient amount of hot water supply, and a hot water storage type electric water heater with a preheating device provided with the preheating device. SOLUTION: A preheating device P and a hot water storage type electric water heater are provided, and water heated in a heating part H of the preheating device P and discharged from a discharge part T is supplied to the hot water storage type electric water heater. The preheating device P includes a heating control unit C in a main body A having an introduction unit N, a heating unit H, and a discharge unit T. The heating unit H includes a first heating stage H1, a second heating stage H2, and a third heating stage H3, which are three heating stages, in series, and constitutes a water guide path from the introduction part N to the discharge part T. Each of the first heating stage H1, the second heating stage H2, and the third heating stage H3 is provided with a U-shaped sheathed heater E in a vertically suspended manner in a vertically long water conveyance tank B for resistance heating by energization from above. The volume of the preheating device P main body A is one tenth or less of the hot water storage type electric water heater. [Selection] Figure 2

Description

  The present invention relates to a preheating device for a hot water storage type electric water heater and a hot water storage type electric water heater with a preheating device provided with the preheating device.

  A hot water storage type electric water heater disclosed in Japanese Patent Application Laid-Open No. 2002-364924 and the like electrically heats supplied water by resistance heating or the like, stores the water heated to a required temperature or more in a hot water storage tank, If necessary, hot water can be used at low cost by heating the water using midnight power.

  However, the amount of hot water supply that can be supplied in a relatively short time in the hot water storage type electric water heater basically corresponds to the size of the hot water storage tank, that is, the size of the hot water storage type electric water heater.

  Since the size of the hot water storage type electric water heater that can be installed at home depends on the conditions of each residence, it may not always be possible to install a hot water storage type electric water heater having a sufficient capacity.

JP 2002-364924 A

  The present invention has been made in view of the above-described problems in the prior art, and the purpose thereof is sufficient even in a hot water storage type electric water heater of a size that has conventionally been difficult to secure a sufficient amount of hot water. It is an object of the present invention to provide a preheating device for a hot water storage type electric water heater capable of realizing an appropriate amount of hot water supply, and a hot water storage type electric water heater with a preheating device provided with the preheating device.

(1) an introduction section for introducing water supplied from a water supply source;
A heating unit that heats the water introduced from the introduction unit by resistance heating;
A main body having a discharge part for discharging water heated in the heating part to supply to a hot water storage type electric water heater;
A heating control unit for controlling the heating unit;
The heating unit has a plurality of serial heating stages for sequentially heating the water introduced from the introduction unit to sequentially increase the temperature,
The heating control unit can control the operation of each heating stage in the heating unit and / or the amount of heating heat in each heating stage, and the heating unit controlled by the heating control unit supplies water introduced from the introduction unit. The temperature of the water supplied to the hot water storage type electric water heater is raised from the water supplied from the water supply source to a required temperature, and the hot water storage type electric water heater is used to continuously supply hot water while heating the supplied water. To increase the continuous hot water supply capacity of
The preheating device for a hot water storage type electric water heater, wherein the main body has a volume of 1/10 or less of the hot water storage type electric water heater.

  The heating unit that heats the water introduced from the introduction unit includes a plurality of serial heating stages for sequentially heating the water introduced from the introduction unit to sequentially increase the temperature.

  The heating unit controlled by the heating control unit that can control the operation of each heating stage in the heating unit and / or the amount of heating heat in each heating stage heats the water introduced from the introduction unit, thereby providing a hot water storage type electric water heater. The temperature of the water to be supplied is raised to a required temperature compared to the water supplied from the water supply source, and the continuous hot water supply capacity of the hot water storage type electric water heater is sufficiently increased when heating the supplied water and heating continuously. it can.

  Since the main body has a volume of 1/10 or less of the hot water storage type electric water heater, a sufficient amount of hot water can be supplied while saving space as much as possible.

  (2) Preheating for a hot water storage type electric water heater according to the above (1), wherein the temperature of the water supplied to the hot water storage type electric water heater is higher by 5 to 15 ° C. or more than the water supplied from the water supply source apparatus.

  (3) The preheating device for a hot water storage type electric water heater according to the above (1) or (2), wherein the continuous hot water supply amount of the hot water storage type electric water heater is increased by 1.5 to 1.8 times or more. >>

  (4) The preheating device for a hot water storage type electric water heater according to any one of (1) to (3), wherein the heating control means is provided in a main body of the preheating device.

  (5) It has temperature detection means for detecting at least one of the water temperature before, during and after heating by the heating unit, and according to the water temperature at one or more points detected by the temperature detection means The hot water storage electric water heater according to any one of (1) to (4), wherein the heating control unit controls the operation of each heating stage in the heating unit and / or the amount of heating heat in each heating stage. Preheating equipment.

  (6) It has a flow rate detection means for detecting whether or not water of a predetermined flow rate or more flows in any location of the main body portion or any location before and after that, and the heating control means is When the heating unit starts and stops, the flow rate detection means is in a state where water of a predetermined flow rate or more flows at one or two or more points in any part of the main body part or any one of the front and back parts thereof. The preheating device for a hot water storage type electric water heater according to any one of the above (1) to (5), which is controlled in accordance with detecting whether or not there is.

  (7) The preheating device according to any one of the above (1) to (6) and a hot water storage type electric water heater are provided, and water discharged from the discharge by being heated in the heating section of the preheating device is provided. A hot water storage type electric water heater with a preheating device, which is supplied to the hot water storage type electric water heater.

  According to the preheating device for a hot water storage type electric water heater of the present invention and the hot water storage type electric water heater with a preheating device including the preheating device, the operation of each heating stage in the heating unit and / or the amount of heating heat in each heating stage can be controlled. The heating unit controlled by the heating control unit heats the water introduced from the introduction unit, thereby raising the temperature of the water supplied to the hot water storage type electric water heater from the water supplied from the water supply source. The amount of continuous hot water supply of the hot water storage type electric water heater in the case of continuously supplying hot water while heating the water being heated can be sufficiently increased, and the main body has a volume of 1/10 or less of the hot water storage type electric water heater. A sufficient amount of hot water can be supplied while saving space as much as possible.

It is a schematic diagram of a hot water storage type electric water heater with a preheating device. It is explanatory drawing of the preheating apparatus for hot water storage type electric water heaters. It is explanatory drawing of the preheating apparatus for another hot water storage type electric water heater. It is explanatory drawing of the preheating apparatus for another hot water storage type electric water heater.

  [1] An embodiment of the present invention will be described with reference to the drawings.

  Each drawing relates to an example of an embodiment of a hot water storage type electric water heater with a preheating device of the present invention.

  (1) The hot water storage type electric water heater S with the preheating device of FIGS. 1 and 2 includes the preheating device P and the hot water storage type electric water heater S, and is heated in the heating unit H of the preheating device P and discharged from the discharge unit T. The discharged water is supplied to the hot water storage type electric water heater S.

  (1-1) The hot water storage type electric water heater S electrically heats the supplied water by resistance heating, etc., and stores the water heated above the required temperature in the hot water storage tank. The hot water is supplied as necessary (internal structure is omitted).

  (1-2) The preheating device P includes a main body A having an introduction part N, a heating part H, and a discharge part T, and a heating control part C. The volume of the main body A of the preheating device P is one tenth or less of the hot water storage type electric water heater S. In addition, the heating control part C can also be provided in the hot water storage type electric water heater S or other places.

  (1-2-1) The introduction part N introduces water supplied from the water pipe W (water supply source) into the main body part A through a metal conduit L.

  (1-2-2) The heating part H is provided with three heating stages, ie, a first heating stage H1, a second heating stage H2, and a third heating stage H3, in series, from the introduction part N to the discharge part T. It constitutes a water conduit.

  Each of the first heating stage H1, the second heating stage H2, and the third heating stage H3 is provided with a U-shaped sheathed heater E in a vertically suspended manner in a vertically long water conveyance tank B for resistance heating by energization from above. In either case, the water introduced from the lower end of one side is discharged from the upper end of the other side and supplied to the next heating stage via the connecting portion G.

  However, the 1st heating stage H1 introduces the water supplied from the water pipe W (water supply source) through the introduction part N. In addition, the third heating stage H3 discharges the water heated in the first heating stage H1, the second heating stage H2 and the third heating stage H3 in order to raise the temperature through the discharge part T, and the metal conduit M is discharged. To the hot water storage type electric water heater S.

  (1-2-3) The heating control unit C controls the heating unit H.

  Based on the output that the water flow switch K provided in the introduction part N detects that water of a predetermined flow rate or more flows, the heating control unit C starts heating in the heating part H, and the water flow switch K is less than the predetermined flow rate. The heating control unit C stops the heating in the heating unit H based on the output that is detected as the flow rate.

  Moreover, according to the water temperature detected based on the output of the temperature sensor R provided in the water conveyance tank B of the 1st heating stage H1, the heating control part C performs the operation | movement of each heating stage in the heating part H, and / or in each heating stage. Control the amount of heat. For example, when the water temperature detected based on the output of the temperature sensor R is equal to or lower than a predetermined temperature, the sheathed heaters E of all the heating stages are heated as the maximum output (maximum heating heat amount), and the detected water temperature becomes high. Accordingly, the output of the sheathed heater E can be lowered and heated. The output can be changed or stopped for each heating stage. In addition, for example, in addition to the temperature before heating by the heating unit, both or one of the water temperature at one or more points during heating and the water temperature after heating, or the temperature in each heating stage, etc. are detected, Accordingly, the output of all the heating stages can be increased or decreased uniformly, or the output can be increased or decreased for each heating stage according to the difference from the reference temperature for each heating stage, depending on the temperature in each heating stage. .

  Thereby, the temperature of the water supplied to the hot water storage type electric water heater S is raised by 5 to 15 ° C. or more than the water supplied from the water supply source, and the hot water storage type in the case of continuously supplying hot water while heating the supplied water. The continuous hot water supply capacity of the electric water heater S can be 1.5 to 1.8 times or more.

  (2) The main body A of the preheating device shown in FIG. 3 includes a first water conduit J1, a second water conduit J2, and a third conduit each having an exothermic paint layer (not shown) that generates heat when energized. The water pipe J3 is connected in series through a U-shaped connecting pipe Q so as to be substantially parallel to each other, and has a heating section H serving as first to third heating stages.

  The introduction part N has a check valve Y and a water flow switch K.

  (3) The main body A of the preheating device shown in FIG. 4 has a water guide tank X formed by alternating wall portions formed by heat generating plates V each formed with a heat generating paint layer (not shown) that generates heat when energized. A heating section H having a plurality of heating stages is formed by forming a water guiding path for guiding water as indicated by arrows by repeatedly bending.

  [2] Embodiments of the present invention will be further described, including forms other than those described above.

  The preheating device of the present invention comprises a main body portion having an introduction portion, a heating portion and a discharge portion, and a heating control portion. The hot water storage type electric water heater with a preheating device of the present invention is a preheating device of the present invention. It consists of a device and a hot water storage type electric water heater.

  (1) The introduction unit in the preheating device introduces water supplied from a water supply source such as a water tap into the main body through a conduit made of synthetic rubber, synthetic resin, metal, or the like.

  (2) The heating part in the preheating device heats the water introduced from the introduction part by resistance heating.

  Heating by resistance heating is performed by, for example, applying a resistance heating element such as a sheathed heater, various heating wires, heating paint, ceramics, or other ceramics on an inner peripheral surface portion or an inner space in a water conduit such as a water conduit or a water tank in a preheating device. It can be performed by providing them and energizing them.

  The heating unit includes a plurality of serial heating stages for sequentially heating the water introduced from the introduction unit and sequentially increasing the temperature.

  As an example of such a heating stage, there may be mentioned one in which a resistance heating element is provided on the inner peripheral surface or the inner space of a water guide path constituting part such as a water pipe or a water tank.

  By providing two or three or more such heating stages in series so as to be all or part of the water conduit from the introduction part to the discharge part in the preheating device, the water introduced from the introduction part is sequentially heated to increase the temperature sequentially. It can be set as the heating part which can be.

  (3) The discharge unit discharges water heated in the heating unit to supply to the hot water storage type electric water heater. For example, the water heated in the heating unit and discharged from the discharge unit The hot water storage type electric water heater can be supplied through a conduit made of synthetic resin, metal or the like.

  (4) The heating control unit controls the heating unit, can control the operation of each heating stage in the heating unit and / or the amount of heating heat in each heating stage, the heating unit controlled by the heating control unit, Water introduced from the introduction part is heated.

  For example, it is detected by temperature detection means (for example, means for detecting temperature based on the output of various temperature sensors provided at a required location) for detecting at least one of water temperature before, during, and after heating by the heating unit. The heating control unit controls the operation of each heating stage in the heating unit and / or the amount of heating heat in each heating stage according to the water temperature at one or more locations.

  Thereby, the temperature of the water supplied to the hot water storage type electric water heater is raised to a required temperature (for example, 5 to 15 ° C. or higher) than the water supplied from the water supply source, and is less than one tenth of the hot water storage type electric water heater. The amount of hot water supply of the hot water storage type electric water heater when the supplied water is continuously heated while heating the supplied water is sufficiently increased (for example, 1.5 to 1.8 times or more) by the main body of the preheating device having a volume of Can do.

  Moreover, the start and stop of the heating in the heating unit are, for example, a predetermined flow rate (for example, 1 mL / s) at one or two or more of any part of the main part of the preheating device or any one of the parts before and after it. ) The heating control means can control the flow rate detection means (for example, a water flow switch) to detect whether or not the above water flows. For example, the heating control means starts heating in the heating unit based on the output detected by the water flow switch provided at a predetermined location that water of a predetermined flow rate or more flows, and the water flow switch has a flow rate less than the predetermined flow rate. The heating control means can stop the heating in the heating unit based on the output that has been detected.

  (5) The heating control means can be provided in the main body of the preheating device, can be provided in the electric water heater main body, or can be provided in other locations.

  (6) If necessary, check valves can be provided, for example, in the water conveyance path before and after the introduction section.

A body part B water transfer tank C heating control part E sheath heater G connection part H heating part H1 first heating stage H2 second heating stage H3 third heating stage J1 first water conduit J2 second water conduit J3 third water conduit K Water flow switch L Conduit M Conduit N Introduction part P Preheating device Q Connecting pipe R Temperature sensor S Hot water storage type electric water heater T Discharge part V Heat generation plate W Water pipe X Water transfer tank Y Check valve

Claims (7)

An introduction section for introducing water supplied from a water supply source;
A heating unit that heats the water introduced from the introduction unit by resistance heating;
A main body having a discharge part for discharging water heated in the heating part to supply to a hot water storage type electric water heater;
A heating control unit for controlling the heating unit;
The heating unit has a plurality of serial heating stages for sequentially heating the water introduced from the introduction unit to sequentially increase the temperature,
The heating control unit can control the operation of each heating stage in the heating unit and / or the amount of heating heat in each heating stage, and the heating unit controlled by the heating control unit supplies water introduced from the introduction unit. The temperature of the water supplied to the hot water storage type electric water heater is raised from the water supplied from the water supply source to a required temperature, and the hot water storage type electric water heater is used to continuously supply hot water while heating the supplied water. To increase the continuous hot water supply capacity of
The preheating device for a hot water storage type electric water heater, wherein the main body has a volume of 1/10 or less of the hot water storage type electric water heater.   2. The preheating device for a hot water storage type electric water heater according to claim 1, wherein the temperature of the water supplied to the hot water storage type electric water heater is higher by 5 to 15 [deg.] C. or more than the water supplied from the water supply source.   The preheating device for a hot water storage type electric water heater according to claim 1 or 2, wherein the continuous hot water supply amount of the hot water storage type electric water heater is increased by 1.5 to 1.8 times or more.   The preheating device for a hot water storage type electric water heater according to any one of claims 1 to 3, wherein the heating control means is provided in a main body of the preheating device.   It has temperature detection means for detecting at least one of the water temperature before, during, and after heating by the heating unit, and the heating is performed according to the water temperature at one or more locations detected by the temperature detection means. The preheating device for a hot water storage type electric water heater according to any one of claims 1 to 4, wherein the control unit controls the operation of each heating stage in the heating unit and / or the amount of heating heat in each heating stage.   It has flow rate detection means for detecting whether or not water of a predetermined flow rate or more is flowing in any part of the main body part or any part of the front and back thereof, and the heating control means is in the heating part. Whether the flow rate detection means is in a state where water of a predetermined flow rate or more flows in one or more of the locations of the main body or any of the locations before and after the start and stop of heating. The preheating device for a hot water storage type electric water heater according to any one of claims 1 to 5, wherein the preheating device is controlled in accordance with the detection.   It comprises the preheating device according to any one of claims 1 to 6 and a hot water storage type electric water heater, and the water heated by the heating part of the preheating device and discharged from the discharge is the hot water storage type electric water heater. A hot water storage type electric water heater with a preheating device that is supplied to the factory.

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