JP7450178B2 - Bathtub hot water heating circulation system - Google Patents

Description

The present invention relates to a system that includes a heat exchanger for keeping the temperature of hot water in bathtub equipment constant and a hot water storage tank for storing hot water.

In conventional technology, the hot water supplied to the bathing tub was supplied by a boiler and a bath heat exchanger, but there is a need to efficiently maintain the temperature of the hot water in the bathing tub, and for example, Patent Document No. 1 discloses a technique for recovering waste heat from bathtub hot water and using it for heating. Patent Document 2 discloses a technique of incorporating hot water piping around a bathtub. These techniques make it possible to maintain a constant temperature of hot water in a bathtub.

JP2004-309044 JP2008-237629

However, although it is required to efficiently maintain a constant temperature of hot water in a bathtub, the conventional technology cannot efficiently maintain the temperature of hot water in a bathtub.
The present invention was made in view of these circumstances, and provides a bathtub hot water heat retention circulation system that can efficiently maintain a constant temperature of hot water in a bathtub and also enables significant cost reduction. The purpose is to provide.

In order to achieve the above object, the invention of claim 1 relating to a bathtub hot water heat retention circulation system includes a bathtub equipment, a bathtub heat exchanger for supplying hot water to the bathtub equipment, and a bathtub heat exchanger for supplying hot water to the bathtub equipment. A high-temperature hot water storage tank for storage, a heat pump facility for supplying hot water to the high-temperature hot water storage tank, and a hot water storage heat exchanger for exchanging heat between the hot water discharged from the bathtub heat exchanger and the hot water in the high-temperature hot water storage tank. The hot water exchanger is characterized in that the temperature of the hot water in the bathtub equipment is kept constant.

According to the present invention, for the hot water supplied to the bathtub equipment, heat exchange of the hot water circulated between the hot water storage heat exchanger and the bathtub heat exchanger, and the hot water heat exchanger and the bathtub heat exchanger are performed. A two-stage heat exchange process is performed in stages: heat exchange of hot water circulating between the As a result, the boiler attached to the bathing equipment can be omitted, and the temperature of the hot water in the bathing tub equipment can be effectively and efficiently kept constant.

Furthermore, according to the present invention, the heat pump equipment that supplies high-temperature hot water to the high-temperature hot water storage tank is electrically operated, so that high-temperature hot water can be stored in the high-temperature hot water storage tank using nighttime electricity. The temperature of hot water in bathtub equipment can be kept constant at low cost. (Claim 2)

Furthermore, the present invention has a low-temperature hot water storage tank for storing hot water discharged from the hot water storage heat exchanger, and supplies hot water from the low-temperature hot water storage tank to the bathtub equipment, the shower attached to the bathtub equipment, and the shower. It is characterized by Therefore, the hot water supplied to showers and showers is supplied by heat exchange with the circulating hot water, resulting in cost reduction.

The present invention is characterized in that the hot water temperature in the high-temperature hot water storage tank is 90° C., which is different from the hot water temperature in the bathtub equipment, so that the temperature can be kept constant.

The present invention is characterized in that the temperature of the hot water in the low-temperature hot water storage tank is 60°C to 70°C, so there is no need to reheat the hot water for filling or showering.

The present invention is characterized in that the temperature of the hot water supplied from the hot water storage heat exchanger to the bathtub heat exchanger is 50°C to 65°C, and the temperature of the hot water in the bathing tub is kept constant by heat exchange of the hot water. can be kept.

According to the present invention, the temperature of hot water in a bathing tub can be efficiently kept constant, and nighttime electricity can be used, resulting in a significant cost reduction.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure of the bathtub hot water heat retention circulation system based on embodiment of this invention.

Embodiments of the present invention will be described in detail below with reference to the drawings.
FIG. 1 is a diagram showing the configuration of a bathtub hot water heat retention circulation system according to an embodiment of the present invention. Referring to the figure, the bathtub hot water heat retention circulation system 1 will be described. This system includes a bathtub equipment 10, a bathtub heat exchanger 3 that supplies hot water to the bathtub equipment, a hot water storage heat exchanger 4, and a high temperature hot water storage tank 5. , heat pump 6, low-temperature hot water storage tank 7, hot water filling faucet 9, and water supply valve 21, bathtub heat exchanger primary side valve 31A, bathtub heat exchanger secondary side valve 31B, hot water storage heat exchanger primary side valve 41 , hot water storage heat exchanger primary side bypass valve 41A, hot water storage heat exchanger secondary side valve 41B, hot water storage heat exchanger secondary side bypass valve 41C, heat pump valve 61, low temperature hot water storage tank primary side valve 71, low temperature hot water storage tank Consisting of a secondary side valve 72, a shower and a flusher 8, the hot water supplied to the bathtub equipment 10 is constantly circulated through the bathtub heat exchanger 3 and the hot water storage heat exchanger 4 by opening and closing each of the above-mentioned valves. The temperature is maintained at a constant level through heat exchange, and hot water is supplied to the shower and shower 8 from a low-temperature hot water storage tank 7.

The low-temperature hot water storage tank 7 uses the waste water used in the hot water storage heat exchanger 4 to store hot water at 70 degrees, and supplies hot water for auxiliary filling of the bathtub equipment 10, as well as for showers and flushing. 8 is supplied with hot water.

The flow of the bathtub hot water heat retention circulation system according to the present invention will be sequentially explained.

In the bathtub equipment 10 according to the present invention, first, hot spring water, tap water, or ground water taken by the water intake equipment 2 such as hot spring water, tap water, or ground water is supplied from the water supply port 111 by opening the water supply valve 21. , and/or hot water supplied from the low-temperature hot water storage tank 7 is supplied from the hot water filling faucet 9 to fill it up.

When the bathtub equipment 10 becomes full, the bathtub heat exchanger valve 31B is opened and hot water below the set temperature flows into the bathtub heat exchanger 3 from the bathtub equipment 10. Using the hot water supplied from the hot water storage heat exchanger 4 as a heat medium, the water becomes hot water at a temperature of 45 degrees Celsius to 55 degrees Celsius, and is returned to the bathing tub equipment 10. This reflux is always performed after the bathtub equipment 10 is full, and the hot water is constantly circulated.

The hot water storage heat exchanger 4 constantly exchanges heat with the hot water circulating between it and the bathtub heat exchanger 3 by using the hot water supplied from the high temperature hot water storage tank 5 as a heat medium.

In heat exchange between the hot water storage heat exchanger 4 and the bathtub heat exchanger 3, when hot water whose hot water temperature is higher than the set temperature flows into the bathtub heat exchanger 3, heat exchange is performed in the bathtub heat exchanger 3. There is no need to close the bathtub heat exchanger primary side valve 31A and the bathtub heat exchanger secondary side valve 31B, and open the hot water storage heat exchanger secondary side bypass valve 41C. Hot water as a heat medium of the exchanger 3 is circulated.

The temperature of hot water as a heat medium supplied from the hot water storage heat exchanger 4 to the bathtub heat exchanger 3 is from 50 degrees Celsius to 65 degrees Celsius.

A heat pump valve 61 is opened to supply and store hot water of 90 degrees Celsius heated by a heat pump 6 into the high temperature hot water storage tank 5. When this system starts such reflux, the primary side valve 41 of the hot water storage heat exchanger is opened, and hot water of 90 degrees Celsius is supplied to the hot water storage heat exchanger 4, and this hot water is used as a heat medium to transfer the hot water to the bathtub heat exchanger. 3. Performs heat exchange with 3.

In the hot water storage heat exchanger 4, when hot water whose temperature is higher than the set temperature flows into the bathtub heat exchanger 3, there is no need for heat exchange in the bathtub heat exchanger 3; The secondary side valve 41B is closed, and the hot water storage heat exchanger primary side bypass valve 41A is opened, so that high-temperature hot water circulates through the hot water storage heat exchanger 4. Then, when the temperature drops to around 70 degrees Celsius during the circulation process, the hot water storage heat exchanger secondary valve 41B is opened to supply hot water to the low temperature hot water storage tank 7.

In the hot water storage heat exchanger 4, when the low temperature hot water storage tank 7 is full, the hot water storage heat exchanger secondary side valve 41B is closed, and the hot water storage heat exchanger primary side bypass valve 41A is opened, and the high temperature hot water is stored. The heat exchanger 4 is used for circulation. Then, when the low-temperature hot water storage tank 7 is no longer full, the hot water storage heat exchanger secondary side valve 41B is opened to supply hot water to the low-temperature hot water storage tank 7.

The heat pump 6 is preferably of an electric type in order to store hot water in the high-temperature hot water storage tank 5 at night using nighttime electricity.

Since heat exchange by the bathtub heat exchanger 3 and the hot water storage heat exchanger 4 is always performed, the temperature of the hot water in the bathtub equipment 10 can be maintained at a constant temperature.

After heat exchange is performed by the hot water storage heat exchanger 4, the hot water storage heat exchanger secondary side valve 41B is opened, and the waste hot water after the heat exchange is stored in the low temperature hot water storage tank 7. The waste water is hot water at a temperature of 60 degrees Celsius to 70 degrees Celsius, and is supplied as hot water for auxiliary filling of bathtub equipment, as well as hot water for showers and showers 8.

Before the start of business hours, the low-temperature hot water storage tank 7 is full, and as soon as business hours start, it is used as auxiliary hot water for showers, flushing 8, and bathtub filling.

It goes without saying that the present invention can be applied in various ways without departing from the scope of the claims.

The present invention provides a bathtub hot water insulation circulation system that can efficiently and significantly reduce costs by reusing waste hot water from heat exchange without reheating the hot water in the bathtub to a constant temperature. do. This will create new value, such as reducing the cost of bath equipment, and will greatly contribute to the development of other industries such as the housing industry.

1: Bathtub hot water heat retention circulation system 10: Bathing bathtub equipment 111: Water supply port 2: Water intake equipment for hot spring water, tap water, underground water, etc. 21: Water supply valve 3: Bathtub heat exchanger 31A: Bathtub heat exchanger primary side Valve 31B: Secondary side of heat exchanger for bathtub Valve 4: Heat exchanger for hot water storage 41: Primary side of heat exchanger for hot water storage Valve 41A: Primary side of heat exchanger for hot water storage Bypass valve 41B: Secondary side of heat exchanger for hot water storage Valve 41C: Hot water storage heat exchanger secondary side bypass valve 5: High temperature hot water storage tank 6: Heat pump 61: Heat pump valve 7: Low temperature hot water storage tank 71: Low temperature hot water storage tank primary side valve 72: Low temperature hot water storage tank secondary side valve 8: Shower , Karan 9: Hot water faucet

Claims (2)

A bathtub facility, a high-temperature hot water storage tank for storing hot water at 90 degrees Celsius, and a heat pump facility for supplying the hot water to the high-temperature hot water storage tank;
the bathtub heat exchanger that exchanges heat of hot water circulating between the bathtub equipment and the bathtub heat exchanger;
the hot water storage heat exchanger that exchanges heat of hot water circulating between the bathtub heat exchanger and the hot water storage heat exchanger;
the hot water storage heat exchanger for exchanging heat of hot water supplied from the high temperature hot water storage tank, passing through the hot water storage heat exchanger and reaching the low temperature hot water storage tank;
Maintaining the temperature of the hot water in the bathtub equipment constant by heat exchange with the hot water by the bathtub heat exchanger and the hot water storage heat exchanger ,
The low-temperature hot water storage tank is characterized by storing hot water at a temperature of 60 to 70 degrees Celsius, and is characterized in that it stores hot water at a temperature of 60 degrees Celsius to 70 degrees Celsius in the bathtub equipment and the shower attached to the bathtub equipment. A bathtub hot water insulation circulation system that supplies hot water at ℃. The bathtub hot water heat retention circulation system according to claim 1, wherein the heat pump equipment according to claim 1 is of an electric type.

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