JP2002035738A - Water saving energy saving water use system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means for saving water as a whole of water utilizing system including water utilizing terminal devices. SOLUTION: This water utilizing system is provided with a bathtub, a circulation passage for reheating and a bathtub water supply passage which are connected to the bathtub, a bathtub water supply means for supplying the bathtub water to the circulation passage for reheating or the bathtub water supply passage, a passage switching means for switching the passage into which the bathtub water is supplied, a drinking water supply passage joined to the bathtub water supply passage, a reclaimed water utilizing terminal device connected to the bathtub water supply passage, a drinking water utilizing water-saving terminal device to which drinking water is supplied, a heating means for heating the drinking water supplied to the bathtub and the drinking water utilizing water-saving terminal device and the bathtub water flowing into the circulation passage for heating, and a control means for controlling the operation of the bathtub water supply means, the passage switching means, and the heating means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water saving and energy saving water utilization system.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 7-60232 discloses a wastewater reuse system that reuses bathtub water as flush water for flush toilets and flush water for washing machines to realize water saving.

[0003]

SUMMARY OF THE INVENTION Japanese Patent Application Laid-Open No. 7-60232
The system of No. 1 merely discloses water saving by reusing wastewater, and does not suggest a water saving measure for the whole water use system including the water use terminal equipment. The present invention has been made in view of the above problems, and has as its object to provide a water-saving and energy-saving measure for an entire water use system including a water use terminal device.

[0004]

According to the present invention, there is provided a bathtub, a reheating circuit connected to the bathtub, a bathtub water supply path, a reheating circuit for supplying bathtub water or a bathtub water supply. A bathtub water supply means for supplying water to the channel, a flow path switching means for switching a flow path through which the bathtub water is supplied, a clean water supply path merging with the bathtub water supply path, and utilization of medium water connected to the bathtub water supply path. A terminal device, a water-saving water-saving terminal device to which the water is supplied, a heating means for heating the water to be supplied to the bathtub and the water-saving water-saving terminal device and the bathtub water flowing through the reheating circuit, and the bathtub A water-saving and energy-saving water utilization system is provided, comprising: a water supply means; a flow path switching means; and a control means for controlling the operation of a heating means. In the water-saving and energy-saving water use system according to the present invention, the bathtub water is supplied to the middle water use terminal device such as a flush toilet or a washing machine for reuse, and the water supply terminal such as a shower, a faucet, and a dishwasher is used. By using the equipment as a water-saving terminal device, water saving is realized for the entire water use system including the water-use terminal device. In addition, by using the water-saving terminal device as a water-saving terminal device, the amount of hot water supplied to the water-using terminal device is reduced, thereby realizing energy saving.

[0005] In a preferred aspect of the present invention, the water-saving energy-saving water utilization system includes a tap water storage tank for storing tap water, and the heating means exchanges heat between the tap water in the tap water storage tank and the refrigerant. Heat pump heating means having a first heat exchanger, a second heat exchanger for exchanging heat between air and refrigerant, and a third heat exchanger for exchanging heat between bath water and refrigerant flowing through the reheating circuit. It is. By operating the first heat exchanger and the third heat exchanger of the heat pump type heating means,
The waste heat in the bathtub water can be recovered to raise the temperature of the clean water in the clean water storage tank. As a result, the energy required for raising the temperature of the hot water supplied to the clean water utilization terminal device is saved, and the energy saving effect is enhanced.

[0006] In a preferred aspect of the present invention, the water-saving and energy-saving water utilization system includes a first heat pump type heating means.
Countercurrent means is provided for countercurrently flowing water and refrigerant in the heat exchanger and the third heat exchanger. In the first heat exchanger and the third heat exchanger of the heat pump type heating means, the flow of water and the refrigerant is made to flow in countercurrent, so that the heat transfer efficiency between the water and the refrigerant is improved, and the energy saving effect is improved. .

In a preferred embodiment of the present invention, the water-saving and energy-saving water utilization system cools and stores bath water at 5 ° C. to 15 ° C. In summer, when the toilet room atmosphere becomes humid, the bathtub water is cooled down to 15 ° C and stored.
It can suppress the growth of bacteria in the bathtub water and suppress dew condensation on the outer surface of the toilet when subjected to toilet flushing, and in the season except summer when the atmosphere in the toilet is lower in humidity than in summer,
By cooling the bath water to 5 ° C. and storing the water, the growth of bacteria in the bath water and the condensation on the outer surface of the toilet can be suppressed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described.
The water saving energy saving water use system according to the first embodiment is shown in FIG.
As shown in FIG. 2, a bathtub 1 and a water heater 2 are provided.
The heat source of the water heater 2 may be a combustion system or an electric system,
Alternatively, solar heat may be used. The water heater 2 is a heat exchanger 21 for reheating.
And a heat exchanger 22 for hot water supply. After the tap water is heated through the hot water supply heat exchanger 22, the hot water supply header 30a
And the electromagnetic valve 31, and further, to the bathtub 1 through the bathtub water / water tapping device 8. The trimming device 8 may be a check valve or a hopper. Bathtub water, bathtub 1
It flows into the reheating circuit 70 through the filter 60 provided in the circulation opening at the lower part of the side wall, flows into the reheating heat exchanger 21 through the pump 3 and the two-way valve 6, and is reheated. Then, the mixture is returned to the bathtub 1. A temperature sensor 80 is provided on the way of the reheating circuit 70.

In the water-saving and energy-saving water utilization system according to the first embodiment, tap water is supplied via a feed water header 30b and a feed pipe, and heated tap water is supplied via a feed header 30a and a feed pipe. Water-saving terminal equipment such as a shower 9a for forcedly mixing fine bubbles, an ejector-supply-type foam hand-washing faucet 9b, a pinch-valve-type automatic faucet 9c, an ejector-supply-type kitchen shower 9d, a dishwasher 9f, and the like. I have. The compressed air generated by the air compressor 90 is supplied to the shower 9 a forcibly mixing fine bubbles through a two-way valve 91 and an air pipe 92. The compressed air generated by the air compressor 90 is also supplied to the reheating circuit 70 via the two-way valve 91 and the air pipe 92, and is used for cleaning the inside of the reheating circuit 70 and stirring the bath water. . still,
As the shower 9a, an ejector air supply type foam shower formed by a pressurized hot water supply pump and an ejector suction unit may be used.

The water-saving and energy-saving water use system according to the first embodiment uses a 6-liter flush toilet 9e that uses less water than before.
And a washing machine 200. Filter 60 and solenoid valve 36 disposed in a drain opening formed in the bottom wall of bathtub 1
Bath water flows into the bath water supply passage 4 through the pump 3 and the two-way valve 6. A pressure sensor 11, a check valve 12, and a sterilizer 7 are provided on the way of the bath water supply path 4. Examples of the sterilizer 7 include a silver (zinc, copper) ion electrode and an ozone generator / injector. The downstream area of the bathtub water supply path 4 forms a header 4a. Water supply header 30b
, And the water flows into the bathtub water supply line 4 via the water supply line 5 that joins the bathtub water supply line 4 between the check valve 12 and the sterilizing device 7. Along the way of the water supply channel 5, a tub water / water separation device 8 and a solenoid valve 32 are provided. Bath water or tap water sterilized through the sterilizer 7 is
It flows into the branch pipe via the header 4a. The bathtub water or clean water flowing into the branch pipe is supplied to a sprinkler (not shown) via an electromagnetic valve 37, supplied to a 6L flush toilet 9e via an electromagnetic valve 38, and connected to a two-way valve 40 and an electromagnetic valve 39. The washing machine 200 is supplied to the washing machine 200 via the washing machine 200. The tap water flowing through the tap water supply path 5 is supplied to the washing machine 200 via the two-way valve 40 and the solenoid valve 39 without passing through the bath water supply path 4.

The water-saving and energy-saving water utilization system according to the first embodiment includes a control device 10. The control device 10 controls operations of the water heater 2, the pump 3, the two-way valves 6, 40, 91, the sterilizing device 7, the electromagnetic valves 32, 36, and the like.

The operation of the water-saving and energy-saving water utilization system according to the first embodiment will be described. When a hot water supply button (not shown) attached to bathtub 1 is operated to start, hot water supply device 2 is controlled by control device 10.
Is operated and the electromagnetic valve 31 is opened to cause the heated tap water to flow into the reheating circuit 70 via the hot water supply header 30a and to be supplied to the bathtub 1 through a part of the reheating circuit 70. When the bathtub 1 is in use, the control device 10, which detects the use of the bathtub 1 by an optical human body detection sensor or the like disposed in the bathroom, detects the temperature of the bathtub water by the temperature sensor 80, and detects the temperature of the bathtub water. Accordingly, the water heater 2, the pump 3 and the two-way valve 6 are appropriately operated to heat the bathtub water while circulating it in the additional heating circulation path 70, thereby maintaining the temperature of the bathtub water at an appropriate temperature. The dust in the bathtub water is removed by the filter 60. The backflow of the bathtub water from the reheating circuit 70 to the hot water supply header 30a is prevented by the edging device 8.

When the bathtub 1 is not in use, the solenoid valve 3
When any of 7 to 39 is opened, the pressure sensor 11 detects a pressure drop in the bathtub water supply path 4. Pressure sensor 1
The control device 1 which detects that any of the water tap, the 6L flush toilet 9e, and the washing machine 200 is used by the signal from 1
0, the solenoid valve 36 is opened, the pump 3 and the two-way valve 6 are operated, and bathtub water is supplied to the bathtub water supply path 4. The dust in the bathtub water is removed by the filter 60. Control device 1
0 activates the sterilizer 7 further. The bathtub water sterilized through the sterilizing device 7 is supplied to the water faucet or the 6L flush toilet 9e, or supplied to the washing machine 200 via the two-way valve 40, and is used in these water utilization terminal devices. Washing machine 2
When the bathtub water is supplied at 00, the backflow of the bathtub water from the bathtub water supply path 4 to the water supply header 30b is prevented by the edging device 8. Water tap, 6L flush toilet 9e, washing machine 20
By supplying the bathtub water to 0, the usage of clean water is reduced, and water saving is realized.

When the bathtub 1 is not in use, the solenoid valve 3
If any of 7 to 39 is opened and the bathtub water level is lower than the predetermined value, the bathtub water level is lower than the predetermined value according to a signal from a water level sensor (not shown) attached to the bathtub 1. Is detected, and a spout, a 6L flush toilet 9e, and a washing machine 200 are detected by a signal from the pressure sensor 11.
The control device 10 that has detected that any one of
The electromagnetic valve 32 is opened, and the tap water is supplied to the bath water supply path 4.
The control device 10 further activates the sterilization device 7. The bath water sterilized through the sterilizing device 7 is supplied to a water faucet or a 6L flush toilet 9e, or the washing machine 2 is supplied through a two-way valve 40.
00 and are used in these water utilization terminals. The reverse flow of clean water from the bathtub water supply path 4 to the reheating circuit 70 is prevented by the check valve 12. By using the 6L flush toilet 9e, the usage of clean water is reduced, and water saving is realized.

When the washing machine 200 performs the rinsing, the control device 10 which has received the rinsing signal from the washing machine 200 does not pass through the bathtub water supply path 4 but directly passes through the two-way valve 40. 200 is supplied with clean water.

When the operation of opening the shower 9a for forcedly mixing fine bubbles is detected by a sensor (not shown), the control device 10 activates the water heater 2 and forces the fine water bubbles through the hot water supply header 30a and the hot water supply pipe. Hot water is supplied to the mixed shower 9a, and the air compressor 90 and the two-way valve 91 are operated to supply compressed air to the fine bubble forced mixed shower 9a via the air supply pipe 92. In addition, clean water is supplied to the fine bubble forcedly mixed shower 9a via the water supply header 30b. The shower 9a forcibly mixing fine bubbles is
Compressed air is mixed into the supplied hot and cold water to discharge a fine bubble flow. Mixing the compressed air with the hot water reduces the usage of clean water and saves water. When the ejector supply type foam hand washing faucet 9b, the pinch valve type automatic faucet 9c, the ejector supply type kitchen shower 9d is opened or the dishwasher 9f is started, the operation is detected by a sensor (not shown). The control device 10 that has been
Is operated, and an ejector air supply type foam hand washing faucet 9b, a pinch valve type automatic water faucet 9c, an ejector air supply type kitchen shower 9d via a hot water supply header 30a and a hot water supply pipe,
Hot water is supplied to the dishwasher 9f. In addition, clean water is supplied to the ejector air supply type foam hand washing faucet 9b, the pinch valve type automatic water faucet 9c, the ejector air supply type kitchen shower 9d, and the dishwasher 9f via the water supply header 30b. Shower 9a forcibly mixing fine bubbles, Ejector supply type foam hand washing faucet 9
b, the use of water-saving terminal equipment such as a pinch valve type automatic faucet 9c, an ejector air supply type kitchen shower 9d, a dishwasher 9f, etc., reduces the amount of water used and realizes water saving. .

When a drain button (not shown) attached to the bathtub 1 is started, the control device 10 opens the solenoid valve 36, activates the pump 3 and the two-way valve 6, and activates the bathtub water supply passage 4.
The bathtub water is drained through a drain pipe (not shown) extending from the header 4a.

The water-saving energy-saving water utilization system according to the first embodiment further includes a warm water circulation type floor heating device 300 and a cold water circulation type cooling device 400. Hot water supply header 30a
Is supplied to the floor heating device 300 through the
0b is supplied to the cooling device 400.

As can be seen from the above description, in the water-saving and energy-saving water use system according to the present embodiment, the bathtub water is supplied to the middle water use terminal equipment such as a water faucet, a flush toilet and a washing machine for reuse. By using water-saving terminal devices such as showers, faucets, dishwashers and the like as water-saving terminal devices, water saving of the entire water-using system including the water-using terminal devices is realized. In addition, by using a water-saving terminal device as a water-saving terminal device, the amount of hot water supplied to the water-using terminal device is reduced, and energy consumed by the water heater is reduced, thereby realizing energy saving.

A description will be given of a second embodiment of the present invention. Figures 3 and 4
As shown in the figure, the water saving energy saving water use system according to the second embodiment is different from the water heater 2 of the water saving energy saving water utilization system according to the first embodiment in that a heat pump water heater 100 and a water storage tank 110 are provided. It has. The heat pump water heater 100 includes a compressor 101, a refrigerant flow switching four-way valve 102, a first heat exchanger 103 for exchanging heat between clean water and a coolant in a clean water storage tank 110, and air and a coolant. A second heat exchanger 104 for exchanging heat between the second heat exchanger 104, a third heat exchanger 105 for exchanging heat between the bath water flowing through the reheating circuit 70 and the refrigerant, and two-way valves 106a to 106 for switching the refrigerant flow path.
f, an expansion valve 107 and a fan 108.
A check valve 121, a solenoid valve 122, a two-way valve 123, and a pump 124 are provided in the middle of a circulation path connecting the clean water storage tank 110 and the first heat exchanger 103. Heat pump water heater 100, solenoid valve 122, two-way valve 123,
The operation of the pump 124 is controlled by the control device 10. Except for the above, the configuration of the water saving energy saving water use system according to the present embodiment is the same as the configuration of the water saving energy saving water use system according to the first embodiment.

The operation of the water-saving and energy-saving water utilization system according to this embodiment will be described. When hot water is supplied to the bathtub 1, the refrigerant pressurized by the compressor 101 passes through the first heat exchanger 103, the expansion valve 107, and the second heat exchanger 104 to the compressor 101, as indicated by arrows in FIG. Reflux. Water in the water storage tank 110 flows out from the lower part of the water storage tank 110 and returns to the upper part of the water storage tank 110 through the pump 124, the first heat exchanger 103, and the two-way valve 123. . In the second heat exchanger 104, heat is sucked from the air to the refrigerant, and in the first heat exchanger 103, the heat is released from the refrigerant to clean water. As a result, the tap water in the tap water storage tank 110 is heated. The heated tap water in the tap water storage tank 110 is supplied to the hot water supply header 30a and the solenoid valve 31.
The water is supplied to the bathtub 1 via the edge cutting device 8 and a part of the bathtub water circulation path 70.

When reheating the bath water, the bath water is reheated in the first reheating mode or the second reheating mode. In the first reheating mode, the refrigerant pressurized by the compressor 101 returns to the compressor 101 through the third heat exchanger 105, the expansion valve 107, and the second heat exchanger 104, as indicated by an arrow in FIG. I do. Bath water circulates through the bath water circuit 70. In the second heat exchanger 104, heat is sucked from the air to the refrigerant, and in the third heat exchanger 105, the heat is released from the refrigerant to the bathtub water. As a result, the bathtub water is additionally heated. In the second reheating mode, the refrigerant pressurized by the compressor 101 returns to the compressor 101 through the third heat exchanger 105, the expansion valve 107, and the first heat exchanger 103, as indicated by an arrow in FIG. I do. Bath water circulates through the bath water circuit 70. The clean water in the clean water storage tank 110 flows out from the top of the clean water storage tank 110, passes through the solenoid valve 122, the pump 124, the first heat exchanger 103, and the two-way valve 123, and passes through the clean water storage tank. 1
Reflux to the bottom of 10. Backflow of hot water to the lower part of the clean water storage tank 110 is prevented by the check valve 121. In the first heat exchanger 103, heat is drawn from the hot water to the refrigerant, and in the third heat exchanger 105, the heat is released from the refrigerant to the bathtub water. As a result, the bathtub water is additionally heated.

When the waste heat is recovered from the bathtub water, the refrigerant pressurized by the compressor 101 is supplied to the first heat exchanger 103, the expansion valve 107, and the third heat exchanger 105 as shown by arrows in FIG. Through the compressor 101 to the compressor 101. Bath water circulates through the bath water circuit 70. Water in the water storage tank 110 flows out from the lower part of the water storage tank 110 and returns to the upper part of the water storage tank 110 through the pump 124, the first heat exchanger 103, and the two-way valve 123. . In the third heat exchanger 105, heat is sucked up from the bathtub water to the refrigerant, and in the first heat exchanger 103, the heat is released from the refrigerant to clean water. As a result, waste heat is recovered from the bathtub water to the clean water in the clean water storage tank 110, and the clean water in the clean water storage tank 110 is heated. The clean water in the clean water storage tank 110 heated by the recovery of waste heat from the bath water is supplied to the fine water forced mixing shower 9a and the ejector air-supply type foam hand washing faucet 9 via the hot water supply header 30a and the hot water supply pipe.
b, a pinch valve type automatic water faucet 9c, an ejector air supply type kitchen shower 9d, a dishwasher 9f, and other water-supplying water-saving terminal devices. By recovering waste heat from bathtub water,
Energy required for raising the temperature of hot water supplied to the water-saving water-saving terminal equipment is saved, and the energy saving effect is enhanced.

Next, a third embodiment of the present invention will be described. As shown in FIG. 8, the water-saving and energy-saving water use system according to the third embodiment includes a four-way valve 131 disposed on the way of the bathtub water circulation path 70.
And a four-way valve 132 disposed on the water circulation path between the water storage tank 110 and the first heat exchanger 103. Except for the above, the configuration of the water saving energy saving water use system according to the present embodiment is the same as the configuration of the water saving energy saving water use system according to the second embodiment.

The operation of the water-saving and energy-saving water utilization system according to this embodiment will be described. When hot water is supplied to the bathtub 1, the refrigerant pressurized by the compressor 101 passes through the first heat exchanger 103, the expansion valve 107, and the second heat exchanger 104 to the compressor 101, as indicated by arrows in FIG. Reflux. The clean water in the clean water storage tank 110 flows out from the lower part of the clean water storage tank 110, passes through the pump 124, the four-way valve 132, the first heat exchanger 103, the four-way valve 132, and the two-way valve 123, and It returns to the upper part of the storage tank 110. As can be seen from FIG. 8, in the first heat exchanger 103, the flows of the tap water and the refrigerant are countercurrent. In the second heat exchanger 104, heat is sucked up from the air to the refrigerant, and the first heat exchanger 1
At 03, heat is released from the refrigerant to clean water. As a result, the tap water in the tap water storage tank 110 is heated. The heated tap water in the tap water storage tank 110 is supplied to the bathtub 1 via the hot water supply header 30a, the electromagnetic valve 31, the edging device 8, and a part of the bathtub water circulation path 70. First heat exchanger 10
In 3, since the flows of the tap water and the coolant are countercurrent, the temperature difference between the tap water and the coolant that flows adjacently is maintained. As a result, the efficiency of heat transfer between clean water and the refrigerant is improved, and the energy saving effect is enhanced.

When reheating the bath water, the bath water is reheated in the first reheating mode or the second reheating mode. In the first reheating mode, the refrigerant pressurized by the compressor 101 returns to the compressor 101 through the third heat exchanger 105, the expansion valve 107, and the second heat exchanger 104, as indicated by an arrow in FIG. I do. Bath water circulates through the bath water circuit 70. The bathtub water flowing out of the bathtub 1 along the bathtub water circulation path 70 passes through the pump 3, the two-way valve 6, the four-way valve 131, the third heat exchanger 105, and the four-way valve 131, and passes through the bathtub 1
Reflux. As can be seen from FIG. 9, the third heat exchanger 10
In 5, the bath tub water and refrigerant flow are countercurrent.
In the second heat exchanger 104, heat is sucked from the air to the refrigerant, and in the third heat exchanger 105, the heat is released from the refrigerant to the bathtub water. As a result, the bathtub water is additionally heated.

In the second reheating mode, the refrigerant pressurized by the compressor 101 passes through the third heat exchanger 105, the expansion valve 107, and the first heat exchanger 103 as indicated by the arrow in FIG. Reflux to 101. Bath water circulates through the bath water circuit 70. The bathtub water flowing out of the bathtub 1 along the bathtub water circulation path 70 returns to the bathtub 1 through the pump 3, the two-way valve 6, the four-way valve 131, the third heat exchanger 105, and the four-way valve 131. As can be seen from FIG. 10, in the third heat exchanger 105, the flows of the bathtub water and the refrigerant are countercurrent. The clean water in the clean water storage tank 110 flows out of the top of the clean water storage tank 110,
Through the solenoid valve 122, the pump 124, the four-way valve 132, the first heat exchanger 103, the four-way valve 132, and the two-way valve 123,
The water is returned to the lower part of the water storage tank 110. Backflow of hot water to the lower part of the clean water storage tank 110 is prevented by the check valve 121. As can be seen from FIG. 10, the first heat exchanger 103
, The flows of the hot water and the coolant are countercurrent.
In the first heat exchanger 103, heat is drawn from the hot water to the refrigerant, and in the third heat exchanger 105, the heat is released from the refrigerant to the bathtub water. As a result, the bathtub water is additionally heated.

In the first reheating mode, the bathtub water and the refrigerant flow in the third heat exchanger 105 in countercurrent, so that the temperature difference between the adjacent bathtub water and the refrigerant is maintained, and the bathtub is cooled. Heat transfer efficiency between water and refrigerant is improved,
In the second additional heating mode, the flow of the bathtub water and the refrigerant is countercurrent in the third heat exchanger 105, so that the temperature difference between the adjacent bathtub water and the refrigerant is maintained, and the bathtub water and the refrigerant are maintained. And the flow of clean water and the refrigerant in the first heat exchanger 103 becomes countercurrent, so that the temperature difference between the clean water and the refrigerant flowing adjacently is maintained. The efficiency of heat transfer between the tap water and the refrigerant is improved. As a result, the energy saving effect increases.

When recovering waste heat from bath water, FIG.
As shown by arrows in FIG. 3, the refrigerant pressurized by the compressor 101 flows back to the compressor 101 through the first heat exchanger 103, the expansion valve 107, and the third heat exchanger 105.
Bath water circulates through the bath water circuit 70. The bathtub water flowing out of the bathtub 1 along the bathtub water circulation path 70 returns to the bathtub 1 through the pump 3, the two-way valve 6, the four-way valve 131, the third heat exchanger 105, and the four-way valve 131. As can be seen from FIG. 11, in the third heat exchanger 105, the flows of the bathtub water and the refrigerant are countercurrent. Water storage tank 110
Water flows out from the lower part of the water storage tank 110,
The water is returned to the upper part of the water storage tank 110 through the pump 124, the four-way valve 132, the first heat exchanger 103, the four-way valve 132, and the two-way valve 123. As can be seen from FIG. 11, in the first heat exchanger 103, the flows of the tap water and the refrigerant are countercurrent. In the third heat exchanger 105, heat is sucked up from the bathtub water to the refrigerant, and in the first heat exchanger 103, the heat is released from the refrigerant to clean water. As a result, waste heat is recovered from the bathtub water to the clean water in the clean water storage tank 110, and the clean water in the clean water storage tank 110 is heated. The clean water in the clean water storage tank 110 heated by the recovery of waste heat from the bath water is supplied to the fine water forced shower 9a, the ejector air-supply type foam hand washing faucet 9b via the hot water supply header 30a and the hot water supply pipe, The water is supplied to a water-saving terminal device using clean water, such as a pinch valve type automatic faucet 9c, an ejector air supply type kitchen shower 9d, and a dishwasher 9f.

By recovering waste heat from bath water, the energy required to raise the temperature of hot water supplied to the water-saving water-saving terminal equipment is saved, and the energy saving effect is enhanced. In the third heat exchanger 105, the flow of the bathtub water and the refrigerant is countercurrent, so that the temperature difference between the adjacent bathtub water and the refrigerant is maintained, and the heat transfer efficiency between the bathtub water and the refrigerant is maintained. Is improved, and the flow of the tap water and the refrigerant in the first heat exchanger 103 becomes countercurrent, so that the temperature difference between the tap water and the refrigerant flowing adjacently is maintained, and The heat transfer efficiency is improved.
As a result, the energy saving effect increases.

In the water-saving and energy-saving water utilization system according to the second to third embodiments, bathtub water is cooled to 5 ° C. to 15 ° C. by waste heat recovery and stored in the bathtub 1. The breeding area of the germs is in the range of 30 ° C. to 40 ° C., and is killed in a higher temperature range than the above range, and the activity is reduced in a lower temperature range than the above range. For example, it is widely known that Legionella fungi are suitable for reproduction at 36 ° C. to 37 ° C., die at 60 ° C. or higher, and are greatly suppressed at 20 ° C. or lower. Since the optimal temperature of the refrigerator for storing food for several days is around 10 ° C, the temperature of the water in a bath tub that updates
By setting the temperature to 5 ° C. or lower, it is considered that the propagation of various bacteria can be sufficiently suppressed. On the other hand, when bath water kept at low temperature is used for toilet flushing, when the relative humidity in the toilet room is 80%,
If the temperature difference between the temperature of the bath water and the room temperature exceeds 15 ° C., dew forms on the outer surface of the toilet. When the relative humidity in the toilet room is 70%, when the temperature difference between the temperature of the bath water and the room temperature exceeds 25 ° C., dew condensation occurs on the outer surface of the toilet. Toilet room temperature is about 3 throughout the four seasons
Assuming that the temperature is 0 ° C., in summer when the relative humidity in the toilet room is about 80%, even if the temperature of the bath water is reduced to about 15 ° C., no dew condensation occurs on the outer surface of the toilet, and the relative humidity in the toilet room becomes 70%. %, Except in summer, when the temperature of the bathtub water is lowered to about 5 ° C, no dew condensation occurs on the outer surface of the toilet.
As described above, if the bathtub water is cooled to 5 ° C. to 15 ° C. by collecting waste heat and stored in the bathtub 1, the growth of bacteria in the bathtub water can be suppressed, and dew condensation on the outer surface of the toilet can be suppressed.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. In the first embodiment, as shown by a chain line in FIG.
A water softener 500 having a built-in cation exchanger may be provided on the branch pipe extending to 00. By passing the bathtub water and clean water supplied to the washing machine 200 through the water softener 500,
Calcium ions and magnesium ions in bath water and tap water are removed, and the amount of detergent used is reduced. In the third embodiment, a four-way valve 131 is provided on the way of the bathtub water circulation path 70,
Although the four-way valve 132 is disposed on the way of the clean water circulation path between the clean water storage tank 110 and the first heat exchanger 103, the four-way valve 141 is provided in the heat pump water heater 100 as shown in FIGS. , 142, the first heat exchanger 1
The flow of the refrigerant flowing through the third heat exchanger 105 and the flow of the bathtub water may be countercurrent.

[0033]

In the water-saving and energy-saving water use system according to the present invention, the bathtub water is supplied to the middle water use terminal equipment such as a flush toilet and a washing machine for reuse, and a shower, a faucet,
By using a water-saving terminal device such as a dishwasher as a water-saving terminal device, water saving is realized for the entire water-using system including the water-using terminal device. In addition, by using the water-saving terminal device as a water-saving terminal device, the amount of hot water supplied to the water-using terminal device is reduced, thereby realizing energy saving.

By operating the first heat exchanger and the third heat exchanger of the heat pump water heater, waste heat in the bathtub water can be recovered and the temperature of the clean water in the clean water storage tank can be raised. As a result, the energy required for raising the temperature of the hot water supplied to the clean water utilization terminal device is saved, and the energy saving effect is enhanced.

In the first heat exchanger and the third heat exchanger of the heat pump water heater, the flow of water and the refrigerant is made to flow countercurrently, so that the efficiency of heat transfer between the water and the refrigerant is improved, and the energy is saved. Increase.

In the summer, when the atmosphere in the toilet room becomes humid,
By cooling and storing the bathtub water to 15 ° C, it is possible to suppress the growth of bacteria in the bathtub water and to prevent dew condensation on the outside of the toilet bowl, except in summer when the indoor atmosphere in the toilet is lower than in summer In the season, by cooling the bathtub water to 5 ° C. and storing it, it is possible to suppress the growth of bacteria in the bathtub water and to prevent dew condensation on the outer surface of the toilet.

[Brief description of the drawings]

FIG. 1 is a device configuration diagram of a water-saving and energy-saving water utilization system according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a portion surrounded by a two-dot chain line in FIG.

FIG. 3 is a device configuration diagram of a water-saving and energy-saving water utilization system according to a second embodiment of the present invention.

FIG. 4 is an enlarged view of a portion surrounded by a two-dot chain line in FIG.

FIG. 5 is an enlarged view of a portion surrounded by a two-dot chain line in FIG. 3;

FIG. 6 is an enlarged view of a portion surrounded by a two-dot chain line in FIG. 3;

FIG. 7 is an enlarged view of a portion surrounded by a two-dot chain line in FIG. 3;

FIG. 8 is an enlarged view corresponding to FIG. 4 of a water saving energy saving water utilization system according to a third embodiment of the present invention.

FIG. 9 is an enlarged view corresponding to FIG. 5 of a water-saving and energy-saving water utilization system according to a third embodiment of the present invention.

FIG. 10 is an enlarged view corresponding to FIG. 6 of a water saving and energy saving water utilization system according to a third embodiment of the present invention.

FIG. 11 is an enlarged view corresponding to FIG. 7 of a water saving and energy saving water utilization system according to a third embodiment of the present invention.

FIG. 12 is a diagram corresponding to FIG. 8, showing a modification of the water-saving and energy-saving water utilization system according to the third embodiment of the present invention.

FIG. 13 is a view corresponding to FIG. 9 and showing a modification of the water-saving and energy-saving water utilization system according to the third embodiment of the present invention.

FIG. 14 is a diagram corresponding to FIG. 10 and showing a modification of the water-saving and energy-saving water utilization system according to the third embodiment of the present invention.

FIG. 15 is a view, corresponding to FIG. 11, showing a modification of the water-saving and energy-saving water utilization system according to the third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathtub 2 Water heater 3 Pump 4 Bathtub water supply path 5 Water supply path 6 Two-way valve 7 Sterilizer 8 Separation device of tap water and bath water 9a Fine bubble forced mixing shower 9b Ejector air supply type foam hand washing faucet 9c Pinch valve type automatic water faucet 9d Ejector air supply type kitchen shower 9e 6L flush toilet 9f Dishwasher 10 Control device 21 Heat exchanger for additional heating 22 Heat exchanger for hot water supply 70 Bath water circulation path 90 Air compressor 100 Heat pump water heater 110 Water supply Storage tank 200 Washing machine 500 Water softener

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F24H 1/00 602 F24H 1/00 602H 631 631F (72) Inventor Masahiro Tsuneda Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Prefecture 2-1-1, Totoki Kiki Co., Ltd. (72) Koji Oshima, Inventor 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka F-term in Totoki Kiki Co., Ltd. 2D039 DA01 2D060 AA03 3L024 CC05 DD19 DD32 DD34 GG12 4D034 AA11 CA01 CA21 DA02

Claims (4)

[Claims] 1. A bathtub, a reheating circuit and a bathtub water supply path connected to the bathtub, a bathtub water supply means for supplying bathtub water to the reheating circuit or the bathtub water supply path, and the bathtub water is supplied. Flow path switching means for switching the flow path, a water supply path merging with the bath water supply path, a medium water use terminal device connected to the bath water supply path, and a water supply water saving terminal equipment supplied with the water supply. When,
Heating means for heating the water supplied to the bathtub and the water-saving water-saving terminal equipment and the bathtub water flowing through the reheating circuit; control means for controlling the operation of the bathtub water supply means, the flow path switching means and the heating means; A water-saving and energy-saving water utilization system characterized by comprising: 2. A water supply storage tank for storing water supply,
The heating means includes a first heat exchanger for exchanging heat between the clean water and the refrigerant in the clean water storage tank, a second heat exchanger for exchanging heat between the air and the refrigerant, and a bath water flowing through the reheating circuit. The water-saving and energy-saving water utilization system according to claim 1, wherein the heat pump heating means includes a third heat exchanger that exchanges heat between the water and the refrigerant. 3. The water-saving and energy-saving water utilization system according to claim 2, further comprising a counter-current means for counter-flowing water and refrigerant in the first heat exchanger and the third heat exchanger. 4. The system according to claim 2, wherein the bathtub water is cooled to 5 ° C. to 15 ° C. and stored.