JPH06261U - Electric water heater residual heat utilization device - Google Patents

Abstract

(57) [Summary] [Purpose] To save power by effectively using the residual heat of expanded water or excess steam in an electric water heater. [Structure] Expanded water or surplus steam discharged from the electric water heater 1 is led to auxiliary equipment such as a hot water supply pipe 14, a mirror cabinet 21 and a towel hanger, and the residual heat is effectively used.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device that effectively utilizes expanded water or surplus steam discharged from the inside of an electric water heater.

[0002]

[Prior art]

 In conventional electric water heaters, expansion water or surplus steam is discharged from the hot water pipe connected to the can body equipped with an electric heater, but this expansion water or surplus steam is discharged to the outside through a drainage channel. Has been done.

[0003]

[Problems to be solved by the device]

 However, effective use of expanded water or excess steam in this type of electric water heater has not been devised at all, and effective use of residual heat of expanded water or excess steam is one of the important resource savings. , Especially from the viewpoint of power saving measures.

[0004]

[Means for Solving the Problems]

 An apparatus for utilizing residual heat of an electric water heater according to the present invention is an apparatus for supplying expanded water or surplus steam discharged from inside the electric water heater to an auxiliary equipment side in the vicinity thereof. Here, the peripheral equipment is, for example, a hot water supply pipe, a mirror cabinet, a towel hanger, or the like.

[0005]

[Action]

 The expanded water or surplus steam discharged from the electric water heater can be instantly heated by heat exchange, for example, by flowing it through a hot water supply pipe, or it can be placed on the back side of the mirror cabinet to heat the mirror for anti-fog purposes. . In the case of an electric water heater with a built-in vanity, the expanded water or excess steam is passed through the hollow pipe of the towel hanger to form a taor warmer hanger.

[0006]

【Example】

 Hereinafter, an embodiment of a device for utilizing residual heat of an electric water heater according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a residual heat utilization device for an electric water heater according to the present invention. The electric water heater 1 shown in the drawing is housed inside a makeup cabinet 2, and its main body has a can body 5 equipped with an electric heater 4 inside an outer case 3. A water inlet pipe 6, a hot water outlet pipe 7, and a drain pipe 8 are connected to the can body 5. A water supply pipe 10 via a pressure reducing valve 9 is connected to the water supply pipe 6, and an extension pipe 12 leading to a water supply connection port of a water faucet 11 is connected to the water supply pipe 6. The hot water outlet pipe 7 is connected to a relief valve 13 for discharging expanded water or surplus steam released to prevent abnormal pressurization in the can body 5, and a hot water supply connection of a faucet 11. A hot water supply pipe 14 reaching the mouth is connected. Below the relief valve 13, a receiving hopper 15 is provided for preventing backflow of expanded water or excess steam, and a base end side of a preheating pipe 16 is inserted in a lower portion of the receiving hopper 15. The preheating pipe 16 is for preheating the hot water supply pipe 14, and is provided around the outer periphery of the hot water supply pipe 14 in a spiral shape. .

Although not shown, for example, by covering the hot water supply pipe 14 and the preheating pipe 16 with a heat insulating material so that the preheating action of the preheating pipe 16 only extends to the hot water supply pipe 14 side, Is preferred. Further, in FIG. 1, the preheating pipe 16 is provided around the outer circumference of the hot water supply pipe 14, but not limited to such a structure, it has a double structure in which the residual heat pipe is coaxially arranged over the outer circumference of the hot water supply pipe. Of course, it can also be done.

However, the expansion water generated by the temperature rise of the stored water in the electric water heater 1 (for example, when 13 liters of stored water is heated from 20 ° C. to 80 ° C., 230 cc of the expanded water is generated). The generated steam or surplus steam is released into the receiving hopper 15 having a larger area than the discharge port thereof, and then preheats the hot water supply pipe 14 through the preheating pipe 16. For this reason, the initial cold water at the time of hot water supply can be suppressed and immediate hot water supply becomes possible.

FIG. 2 is a partial perspective view showing another embodiment of the residual heat utilization device of the electric water heater 1 according to the present invention. In this embodiment, when the expanded water or the excess steam is used to prevent the mirror 20 from frosting, a heating pipe 22 for passing the expanded water or the excess steam is provided on the back side of the mirror cabinet 21. The path from the electric water heater 1 to the pipe 22 and the point 23 of the pipe 22 communicating with the discharge pipe 24 are the same as those shown in FIG. With this configuration, the back surface side of the mirror 20 can be warmed, so that an antifogging effect can be achieved. Note that the pipe 22 is not limited to the elongated shape shown in the figure, and can be, for example, a meandering shape.

In addition to the above-described embodiment, in the case of an electric water heater with a built-in vanity, for example, expanded water or excess steam is passed through a hollow pipe of a towel hanger to be used for drying towels and the like. You can also

[0011]

[Effect of device]

 As described above, according to the present invention, it is possible to effectively use the expanded water or the surplus steam of the electric water heater, which is preferable for power saving.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a residual heat utilization device of an electric water heater according to the present invention.

FIG. 2 is a partial perspective view showing another embodiment of the residual heat utilization device of the electric water heater according to the present invention.

[Explanation of symbols]

 1 ... Electric water heater 7 ... Hot water pipe 13 ... Escape valve 14 ... Hot water supply pipe 16 ... Preheat pipe 22 ... Piping

Claims (1)

[Scope of utility model registration request] 1. A residual heat utilization device for an electric water heater, wherein expanded water or surplus steam discharged from the inside of the electric water heater is supplied to an auxiliary facility side in the vicinity thereof.