JP3014835U - Electric heat backup device for solar water heater using solar heat - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a supplementary backup heat source by electric heat in the case of lack of solar heat source such as nighttime, cloudy weather and rainy weather of the solar water heater. [Constitution] Solar water heater and P. T. This is a configuration in which C-plane heating elements are combined.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a solar water heater using solar heat for energy saving, etc., and was filed by the applicant in Japanese Patent Application No. 6-186692 in order to back up the time when heat cannot be supplied during nighttime, cloudy weather, and rainfall. P. T. This relates to the use of an electric sheet heating element having C capability.

[0002]

[Prior art]

 In the prior art, as shown in FIG. 1, the solar heat collecting plate was separately supplied as needed by heating by oil or gas boilers or electric heat. Of these, as shown in Table 1, the time of annual solar heat supply was shorter than expected, and in order to supply hot water throughout the year, a considerable amount of oil, gas, boiler, or electric heat was required, which resulted in a large cost. Was needed.

[0003]

[Problems to be solved by the device]

 Fig. 2 shows the temperature of the hot water in a year, and Fig. 3 shows the state of the hot water load during the day, and the change in the hot water supply amount can be well understood. As shown in these tables, even if we look at the amount of supply on a sunny day, if we consider the table of fine weather, rainy days, and cloudy days, it will be 1 / It is the second heat supply day.

[0004]

[Table 1]

The present invention intends to back up these shortfalls with electric power. T. C. Due to the planar heating element that has the function of self-temperature control, almost no power is supplied when the sunny weather is sufficient, that is, when the water is hot, and it is necessary when the load is heavy, rain, or cloudy weather. It is intended to consume power only when power is required, in which more power is supplied only in time.

As shown in FIG. 5, in case of rain or fine weather, it takes about 8 hours on average for one day to keep the required temperature of 230 liters of hot water. It is 1.8 KW / H, which is a fairly low price and can supply the necessary hot water regardless of whether it is sunny or rainy yearly.

[0007]

[Equation 1]

[0008]

[Means for Solving the Problems]

 P. T. C, that is, the sheet heating element having a self-temperature control function does not increase in temperature at the maximum temperature of 55 ° C to 60 ° C or more, as shown in the characteristics of heat and power used in the present invention in FIG. When the temperature rises from the maximum temperature of 55 ℃ to 60 ℃, the electric resistance increases ten-fold, and the power consumption also drops to one tenth (the electric resistance increases when the temperature of the atmosphere decreases). There is.

[0009]

[Work]

 This eliminates the need for a thermostat for temperature control and a thermal fuse when the temperature is too high. If the hot water temperature during daytime fine weather rises to 60 ° C to 70 ° C, it will be almost zero if energized. The proposed heater, which has the property of near power consumption, is installed in the heat collection tank to more economically compensate for the heat source shortage in cloudy weather or rainy weather.

[0010]

【Example】

 The details of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall view of a commonly used solar water heater.

FIG. 6 and FIG. 7 are views showing a plurality of sheet heating elements of the present invention provided in a heat storage tank. By providing the sheet heating elements in the heat storage tank, almost all of the heat generated by the sheet heating element stores heat. Heat is dissipated in the tank.

FIG. 8 shows a case where a heater is used around the heat storage tank and is surrounded by a heat insulating material. In this case, P. T. Details of the C-plane heating element and wiring are omitted.

[0014]

[Effect of device]

 Since the electric heat backup device of the solar water heater using solar heat according to the present invention uses a planar heating element having a PTC effect and a maximum temperature of about 60 ° C as an auxiliary heat source, the hot water of 50 to 60 ° C required for the solar water heater is used. If it becomes, the power consumption will automatically become the minimum, and it will produce many effects as a more economical heat source.

[Brief description of drawings]

FIG. 1 is an overall view of a commonly used solar water heater.

FIG. 2 is an annual average water temperature chart of a water heater.

FIG. 3 is a ratio diagram of hot water supply amount.

FIG. 4 P. T. Performance chart of C-plane heating element.

[Figure 5] Implementation of changes in water temperature when using a late night charge with the proposed heater and calculated and implemented values of the domestic average.

6 is a P. T. The figure which completely covered the C-plane heating element with a thin plate such as stainless steel or aluminum alloy.

FIG. 7 is a diagram in which the heater of FIG. 6 is built in a heat storage tank.

FIG. 8 is a view in which a heater is installed on the outer circumference of a heat storage tank and surrounded by a heat insulating material.

[Explanation of symbols]

 1 Heat collector 2 Heat storage tank 3 Water supply level adjustment device 4 Source water supply pipe 5 Hot water supply pipe 6 Overheated boiler by electric heat 7 Bath tub 8 Washbasin 9 Sink 10 Washer 11 P. T. C-plane heating element 12 P. T. C-plane heating element cover seal portion 13 P. T. C-shaped heating element cover 16 Water supply pipe to heat collecting tank

Claims (2)

[Scope of utility model registration request] 1. A solar hot water storage tank has an outer periphery,
P. T. C (Positive Temperature)
An electric heat backup device for a solar water heater using solar heat, which is equipped with a sheet heating element having e-coefficient capability and a heat insulating material on the outside thereof. 2. A P.O.P. completely covered with a thin plate such as stainless steel or aluminum alloy. T. The electric heating of a solar water heater utilizing solar heat according to claim 1, wherein a planar heating element having a C effect is provided inside a tank of the solar water heater, and the whole is submerged in hot water to convey all heat generated by the planar heating element to the hot water. Backup device.