JP2003004299A - Energy saving manufacturing method of hot water supply apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a full automatic home bath hot water supply system and a full automatic hot water supply system that improvement of energy balance is insufficient although gas, kerosine, and the like, are consumed. SOLUTION: Energy is saved with regard to heat loss of exhaust gas by feeding exhaust heat being discharged to an exhaust heat recovery system in order to produce exhaust heat hot water being used in a bath hot water supply system and a hot water supply system. Energy is saved with regard to heat loss of a water passage by changing a gunmetal component to a resin component thereby reducing heat radiation and decreasing the number of antifreeze heaters. Energy is saved with regard to heat loss of an iron plate outer box by changing it to a thermoplastic polyimide resin molding outer box thereby reducing heat radiation. A bath hot water supply system and a hot water supply system are the objects of the invention and the name of the components is different from manufacturer to manufacturer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a home bath hot water supply system and a hot water supply system, which uses an exhaust heat recovery system to save energy and reduce heat radiation of water passage equipment, and an outer box formed of a plastic polyimide resin. It has energy saving and measures for low temperature corrosion of exhaust heat recovery system.

[0002]

2. Description of the Related Art In a conventional domestic bath hot water supply system and hot water supply system, gas or kerosene is used for heating energy, and when the outside air temperature is 20 ° C., the exhaust temperature is 1
The temperature is as high as 60 ° C, the outer box of the bath hot water supply system is a thin iron plate that does not retain heat, and the combustion heat can escape as much as possible, and the bath water hot water supply system for home needs improvement in energy balance.

[0003]

In the conventional domestic bath hot water supply system and hot water supply system, in order to improve energy dispersion, exhaust heat is reused, the optimum material for the outer box is selected, and the resin-molded component is used rather than the metal-worked component. I would like to solve it by adopting etc.

[0004]

In order to solve the above problems, the present invention provides a means for solving the problems by examining the ratio of exhaust heat to the input energy, the ratio of heat radiation, the ratio of hot water and the like.

[0005]

According to the first to third aspects of the present invention, exhaust heat has been discarded until now, but since it is taken into the exhaust heat recovery system by the exhaust duct of the bath and the hot water supply, a bath hot water supply system for home and hot water supply The system is a method that allows hot waste water to be used for water supply, resulting in cheaper gas or kerosene. According to claim 4, the water amount sensor, the water amount servo, the bypass servo, etc. used in the water passage are gunmetal processed parts and have high heat radiation, and the heat radiation is low by changing to resin molded parts, and the manufacturing cost is low. Is the way to be. The fifth aspect of the claim is that the bath hot water supply system and the outer box of the hot water supply system are thin iron plates, and in order to prevent heat radiation on the surface, change to an outer box made of thermoplastic polyimide resin mixed with carbon fiber, or inside the outer box. This is a method of properly arranging the heat insulating material and the reinforcing iron plate. A sixth aspect of the present invention is a method for preventing low-temperature corrosion due to dew condensation water on a metal surface of an exhaust heat recovery chamber of an exhaust heat recovery system or a heat exchanger with a Teflon coat.

In the above, the first aspect of the invention is that the water intake port of the exhaust heat recovery system has a water filter and drain plug,
Connect the water volume sensor, water volume servo, and bypass servo. According to claim 2, only a water filter / drain plug is connected to the water intake of the exhaust heat recovery system, and the water filter / drain plug, the water amount sensor, the water amount servo and the bypass servo are connected to the exhaust heat recovery system. Connect to the exhaust heat water side. According to a third aspect of the present invention, in the fully automatic hot water supply system, a water filter / drain plug, a water amount sensor, and a water amount servo are connected to the water inlet of the exhaust heat recovery system. In addition, claim 1, 2,
3. The common point of 3 is the method of connecting the exhaust heat water of the exhaust heat recovery system to the water supply of the bath hot water supply system, and the bath hot water supply system is linked with the combustion fan speed pulse control so that excess or deficiency of combustion air does not occur. As described above, the exhaust fan of the exhaust heat recovery system controls the rotation speed pulse.

In the present invention, the number of hot water supply capacity is 32, 24,
If there are 20, 16, 13, 8.5, 7, and 6.5, the capacity of the exhaust heat recovery system is determined according to the number of hot water supply capacity.

[0008]

EXAMPLES Examples will be described with reference to the drawings.
FIG. 2 is an operation principle diagram of a bath hot water supply system including an exhaust heat recovery system in FIG. 1. To supply tap water or ground water, exhaust heat hot water is produced in the exhaust heat recovery chamber (7) and exhaust heat exchanger (8).
Further, the burner is heated in the hot water supply combustion chamber (12) and the bath combustion chamber (13) to become hot water for the shower or bath. However,
Water filter and drain plug (1) Water amount sensor (2) Water amount servo (3) Bypass servo (4) etc. are used in the exhaust heat exchanger (7)
The method is to connect to the water supply side of to increase the temperature adjustment range.

In the embodiment shown in FIG. 2, tap water or ground water is supplied to the shower or bath by producing hot exhaust heat in the exhaust heat recovery chamber (7) and the exhaust heat exchanger (8). However,
The water filter / drainage plug (1) is connected to the water supply side of the exhaust heat exchanger (7), but the water amount sensor (2), water amount servo (3), bypass servo (4), etc. are connected to the exhaust heat exchanger (7). The method is to connect to the exhaust heat hot water side to reduce the temperature adjustment range.

In the embodiment shown in FIG. 3, tap water and ground water are supplied to the exhaust heat recovery chamber (7) by the exhaust heat exchanger (8) to generate hot exhaust heat water, and then in the hot water supply combustion chamber (12). The burner heats up and becomes hot water in the kitchen or washbasin. However, the water filter / drain plug, the water amount sensor, the water amount servo, the bypass servo, and the like are connected to the water supply side of the exhaust heat exchanger (7) to provide a large temperature adjustment range.

In the embodiment shown in FIG. 4, the whole is kept warm in an outer box (14) formed of a resin such as thermoplastic polyimide mixed with carbon fibers, and glass wool (15) or styrofoam (16) is placed on the front and back surfaces. The method of attaching the adhesive to keep the bath hot water supply system or the exhaust heat recovery system doubly warm. The side reinforcing iron plate (17) and the upper and lower reinforcing iron plates (18) are attached to the inside with screws to fix each device, pipes, ducts, etc.

[0012]

The present invention is carried out in the form as described above, and has the following effects.

The bath hot water supply system that consumes gas, kerosene, etc. dissipates exhaust heat, and exhaust heat can be reused by using the exhaust heat recovery system of the invention. Therefore, gas and kerosene are 10 to 50% in each household. You can save. Condensation water and white smoke are produced when using the exhaust heat recovery system, but this phenomenon is energy saving due to water evaporation of gas and kerosene.

Manufacturing cost and heat radiation can be reduced by using resin-processed parts such as gun metal processed parts (water amount sensor, water amount servo, bypass servo) used in the water passage.

When the exhaust heat temperature is 160 ° C., a heating prevention device (thermal fuse 120 ° C. set) is attached, and there is no need for an outer box surrounded by an iron plate. Therefore, an outer box formed of a thermoplastic polyimide resin having a heat resistance of 250 ° C. is a promising measure because the manufacturing cost tends to be low.

Glass wool or styrofoam is attached to the front side and the back side with an adhesive, so that the equipment must be fixed from the back side to the side, and heat radiation is reduced to save energy.

[Brief description of drawings]

FIG. 1 is an operation principle diagram of a fully automatic bath hot water supply system in which a water passage device is installed on a water supply side of an exhaust heat recovery system.

FIG. 2 is an operation principle diagram of a fully automatic bath hot water supply system in which a water passage device is installed on the hot water side of an exhaust heat recovery system.

FIG. 3 is an operation principle diagram of a fully automatic hot water supply system in which a water passage device is installed on a water supply side of exhaust heat recovery.

FIG. 4 is a plan view and a cross-sectional view of an outer box formed by molding a thermoplastic polymide resin.

[Explanation of symbols]

1 Water filter and drain plug 2 Water amount sensor 3 Water servo 4 bypass servo 5 Water pipe B 6 Bath and intake duct for hot water supply and exhaust 7 Waste heat recovery room 8 Exhaust heat exchanger 9 exhaust fan 10 Exhaust damper 11 Condensation drain plug 12 Hot water supply combustion chamber 13 bath combustion chamber 14 Thermoplastic Polyimide Resin Molded Outer Box 15 Glass wool insulation 16 Styrofoam insulation 17 Reinforcing iron plate on the inner side 18 Reinforced iron plates on the top and bottom inner surfaces

Claims (6)

[Claims] 1. An exhaust heat recovery system (6, 7, 8, 9, 1)
0, 11) water passage equipment (1, 2, 3, 4) is installed on the water supply side, and waste hot water is used to supply water to the bath hot water supply system. 2. The exhaust heat recovery system (6, 7, 8,
9, 10, 11) water passage device (2, 3,
Incorporating 4), the hot water from the bath hot water supply system uses waste heat water. 3. An exhaust heat recovery system (5, 6, 7, 8, 9,
Water passage equipment (1, 2, 3, 4) on the water supply side of (10, 11)
Incorporating the above, the hot water supply system uses waste heat water. 4. A method of incorporating heat treated resin into the water passage equipment (2, 3, 4) to reduce heat radiation in a bath water system. 5. An outer box (14) made of a thermoplastic polyimide resin is adopted for a bath hot water supply system and an exhaust heat recovery system, and a heat insulating material (15, 16) and a reinforcing iron plate (17) are provided on the inner surface of the outer box. , 18) to reduce thermal radiation. 6. A method for preventing low temperature corrosion by coating a Teflon (registered trademark) coat on a metal surface in the exhaust heat recovery chamber (7) and the exhaust heat exchanger (8).