JPS60196551A - Hot water supplying device utilizing solar heat - Google Patents

Abstract

PURPOSE:To maintain hot water with stable temperature at all times and consequently improve operational convenience by a method wherein the water in a heat exchanger is heated in case that the solar heat alone is not enough for the required heat quantity by covering the outer periphery of a heat exchanger comprising a part of a heat collecting circuit with an auxiliary heater in order to store hot water with desired temperature in a hot water storage tank. CONSTITUTION:An auxiliary electric heater 14 consisting of a planar heat generating body is wound so as to closely contact with the outer periphery of a heat exchanger 3'. On the days with poor insolation or small collected heat energy and with low atmospheric temperature, an energizing switch 20 is turned ON by hand. When the water temperature at the inlet of the heat exchanger 3' is lower than the desired temperature set by a temperature controller 19, the temperature on the water side rises very quickly by receiving heat from both flon gas and the auxiliary heater 14. After that, when said water temperature reaches the set temperature, the temperature controller 19 stops the energizing the power to the auxiliary heater 14.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a solar water heating system.

Conventional Structure and Problems A heat collector 1, a compressor 2, a heat exchanger 3, and an expansion valve 4 are all connected in sequence to form a heat collection circuit using a refrigeration cycle. Water is circulated by a heat exchanger 3 using a pump 1o to a hot water storage tank 9 equipped with a water supply port 5, a hot water supply port 6, a circulation lower, and 8, and solar heat is stored.Of course, the amount of heat obtained from the solar heat is: 11 ``I'm always worried, and it's very difficult to complete the entire hot water supply load with just this.Therefore, we need to supply hot water from the hot water tank 9 [216] via other auxiliary heat sources 11 (e.g. boilers, electric water heaters, etc.). A system has been used to supply hot water using water.

In this method, (1) In addition to the solar heat collector, an auxiliary heat source device 11 is also required, and the equipment cost is extremely high.

(2) A very large installation space is required to install two tanks.

(3) In two tanks? Since PJ is used to store hot water, there is a large amount of heat loss due to heat radiation.

It had problems such as these, and was not suitable for practical use in general households.

OBJECTS OF THE INVENTION An object of the present invention is to provide an auxiliary heater in a part of a solar heat collection circuit, to always have hot water at a stable temperature, and to completely improve usability.

Structure of the Invention The present invention uses an auxiliary heater on the outer periphery of a non-exchanger that is a component of a heat collection circuit, and heats water in the heat exchanger with this heater when the amount of heat is insufficient due to solar heat alone. Hot water is stored in a hot water tank.

Description of examples Embodiments of the present invention will be described with reference to the drawings.

In FIG. 2, the solar heat collecting circuit is the same as in FIG. Freon gas is used as a heat medium in the heat collection circuit. In FIG. 3, the heat exchanger 3' is made into a cylindrical shape by alternately winding a tube 12 having a fluorocarbon gas passage and a tube 13 having a water passage in a helical shape. It is configured to perform direct heat exchange.

An electric auxiliary heater 14 made of a planar heating element is wrapped tightly around the outer periphery of this heat exchanger.] This auxiliary heater 14 is connected to the heater main body 1 as shown in FIG.
5, a connecting terminal 16, and mounting metal fittings 17 and 18. It is wired in series with a temperature regulator 19 provided at the water inlet of the heat exchanger 3' and a separately installed energization switch 20.

? ’xK operation will be described. .

The amount of heat collected decreases [] in eyes with little radiation or in low temperatures [1]
To do this, turn on the power switch 20 manually.

If the temperature regulator 19 is set at about 60'C, when the inlet water temperature is below this value, the temperature on the water side will rise very quickly as it receives heat from both the freon gas and the auxiliary heater 14. When the temperature of the water reaches 60°C, the temperature controller 19 stops the electricity supply (1-1).Also, if the set temperature of the temperature controller 19 is about 3°C, the outside air freezes at a very low temperature in winter. Auxiliary heater 1 when there is a risk of
4 is energized and generates heat, preventing freezing on the water side.

Since the outside of the auxiliary heater 14 is covered with the heat insulating material 21, heat loss is extremely small.Advantages of the Invention (1) The auxiliary heater of the present invention has a structure that covers the outer periphery of the heat exchanger, so there are the following advantages.

a qj' There is no need to modify the heat tank (=f) and any type of tank can be used as a solar hot water storage tank.

b. Unlike the sheathed heater of a conventional electric water heater, it can be easily submerged in water, so it does not impair water quality, does not require waterproofing, and is inexpensive.

In addition to its function as an auxiliary heat source, it can also function as an antifreeze heater.

(2) According to the present invention, since other auxiliary heat source equipment is cumbersome, there are the following advantages.

a. Equipment costs can be significantly reduced.

b. Installation space can be reduced. (About 1/2) Heat radiation loss other than the C heat storage tank can be reduced.

This is extremely effective.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing a conventional system, Fig. 2 is a system diagram showing an embodiment of the present invention, Fig. 3 is a partially cutaway bottom view of the same main part, and Fig. 4 is an iF diagram of the auxiliary heater. It is a surface. 3'...Heat exchanger, 9...Hot water storage tank, 1
4... Auxiliary heater, 19... Temperature controller, 20... Energization switch. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 1 Figure 3 1θ Figure 4

Claims (2)

[Claims] (1) A heat collection circuit is formed by connecting a heat collector, a compressor, a heat exchanger, and an expansion valve with piping, and the water to be heated is circulated through the heat exchanger using a pump, etc., and the heat is stored in a hot water storage tank. In addition, the outer periphery of the heat exchanger is equipped with an auxiliary heater made of a planar heating element, and a temperature regulator is connected to the auxiliary heater. (2) The solar heat hot water supply device according to claim 1, wherein the operating temperature of the temperature controller is arbitrarily varied and the device also functions as a heater for freezing prevention during the yarn period.