JPH0424362Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to the structure of an energy-saving hot water supply facility that utilizes solar heat for hot water supply and bathtub use.

Configuration of Conventional Example and Its Problems The configuration of the conventional system will be explained with reference to FIG. 1
is a heat collector, and the compressor 2, heat exchanger 3, and expansion valve 4 are connected in this order to constitute a heat collection circuit of the heat medium side flow path 3a. Further, the hot water supply circuit connects the heat storage tank 5 and the water side flow path 3b of the heat exchanger 3 via a pump 15 via piping.
Conventional systems like this: (1) Since they are heat collectors using heat transfer circuits that can only collect heat at relatively low temperatures, they cannot provide the appropriate temperature for bathing, so they cannot be used with other systems such as gas bathtubs. A heat source device for the bath was needed.

(2) All the required amount of hot water is stored in the heat storage tank, which results in a very large capacity and poor installation space and workability.

It had problems such as.

Purpose of the invention This invention aims to improve the above-mentioned problems, and its purpose is to provide a bath heating circuit as part of the solar heat collection circuit, so that solar heat can be used for hot water supply and bathing as needed. The purpose is to provide a device that can do this.

Structure of the Invention In order to achieve the above object, the solar heat utilization device of the present invention is provided with a heat exchanger that heats both the hot water supply water and the water in the bathtub using a heat medium heated by solar heat. The vessel is constructed with three channels, the central channel is used as the heat medium, and hot water and bath heated water are arranged in the channels adjacent to both sides of the channel.

This invention has a heat exchanger centered around a heat medium for heat collection, with hot water supply water and bath heating water arranged on both sides, and efficiently connects the heat collection circuit, hot water supply circuit, and bath heating water circuit. This structure allows for effective use of hot water supply.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, the heat collection circuit connects a heat collector 1, a compressor 2, a heat exchanger 6, and an expansion valve 4 in this order to form a heat medium side flow path 6a. The hot water supply circuit is formed by connecting the hot water supply flow path 6b of the heat exchanger 6 via the circulation pump 8 at the lower part of the heat storage tank 7. The bath heating water circuit is formed by connecting the bathtub 9 and the bath heating water passage 6c of the heat exchanger 6 via a bath pump 10.

Next, the specific configuration of the heat exchanger 6 will be explained.
In FIGS. 3 and 4, a tube 6 with a flat cross-sectional shape is shown.
Three tubes a', 6b', and 6c' are used to tightly connect the flat parts of each tube, and the tube is wound in a spiral shape in the longitudinal direction. The tube is wound in a cylindrical shape so that its oblique plane is parallel to the center axis of the spiral.
The pipe 6a' located in the center circulates refrigerant gas as a heat medium, the outer pipe 6b' circulates hot water, and the inner pipe 6c' circulates bath heating water.

Further, the outside of the heat exchanger 6 is covered with a heat insulating material 11 that prevents heat radiation to the outside.

Next, to explain the operation of the present invention, when both the heat storage tank 7 and the bathtub 9 are filled with water and the compressor 2 is operated, the heat medium that has evaporated by receiving solar heat in the heat collector 1 is transferred to the compressor 2 at high temperature and high pressure. It is compressed as a gas and enters the heat exchanger 6. At this time, first, the bath pump 10 is driven to circulate the bath heated water. As a result, the heat of the heating medium is released into the bath heated water and condensed, resulting in a high pressure and medium temperature state. This heat medium then passes through the expansion valve 4 and is at low pressure.
It becomes a low-temperature heat medium, evaporates in the heat collector 1, and the heat collection cycle is repeated.

During this time, the bath heating water gradually rises in temperature, and when it reaches an appropriate temperature, the bath pump 10 is stopped and the bath heating is completed. Then, the circulation pump 8 is started and the hot water supply operation begins. The operation is continued until the inside of the heat storage tank 7 reaches a predetermined temperature, and when the temperature reaches a predetermined temperature, the operation of the heat collector is completed. In this way, the capacity of the heat storage tank is set to be as small as the capacity for dropping hot water into the bathtub 9.

Furthermore, when the temperature of the water in the bathtub drops, it is possible to reheat the bath by running the bath heating operation again.

Effects of the invention (1) All household hot water supply needs can be provided by solar heat. Therefore, there is no need to provide other boilers, water heaters, bathtubs, etc., and equipment costs can be significantly reduced.

(2) Since there is no need to rely on other fuels, the amount of heat collected increases, resulting in significant energy savings.

(3) It is possible to reheat the bath, making bathing more comfortable and improving usability.

(4) Since the capacity of the heat storage tank does not require the amount of hot water to be supplied by dropping it into the bathtub, it can be made extremely compact, reducing installation space and significantly improving workability.

(5) Switching between hot water supply operation and bath heating operation is done simply by turning on and off the pump, and there is no need to operate a complicated switching valve, so a highly durable device with few breakdowns can be provided.

(6) 1 for the two loads of hot water supply water and bath heating water
This can be achieved with just one heat exchanger, making it possible to create a system that is extremely inexpensive, including the number of incidental parts.

(7) Since the flat tube is wound in a shape parallel to the central axis of the helix, there is no heat exchange between the hot water supply water and the bath heating water, and the heat of the heating medium is not wasted.

[Brief explanation of the drawing]

Fig. 1 is a system diagram of a solar heat utilization device showing a conventional method, Fig. 2 is a system diagram of the same device showing an embodiment of the present invention, Fig. 3 is a top view of the heat exchanger of the same device, and Fig. 4 is a cross-sectional view of the heat exchanger. 6... Heat exchanger, 6a... Heat medium side flow path, 6b...
...Hot water supply flow path, 6c...Bath heating water flow path, 9...
Bathtub.

Claims (1)

[Scope of utility model registration request] It is equipped with a heat exchanger that heats both the hot water supply water and the water in the bathtub using a heat medium heated by solar heat, and the heat exchanger is formed of three flat tubes, and the flat surfaces are brought into close contact with each other. , and the longitudinal direction of these flat tubes is wound in a spiral shape in a cylindrical shape with the same central axis, and the flat tubes are configured to be parallel to the central axis, thereby forming three channels,
A configuration in which the heat medium is circulated through the flow path in the flat tube located at the center of the three flat tubes, and hot water supply water and bath heated water are respectively circulated through the flow paths in the flat tube that are in contact with both sides of the heat medium. A solar heat utilization device.