JP2013245911A - Bath connection auxiliary piping - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide bath connection auxiliary piping that reduces the amount of temperature-uncontrolled water output by a water heater in current water boiling since temperature-controlled hot water is supplied from the water heater from the time hot water supply is started with respect to an instrument which supplies hot water of the water heater such as a bath connection adapter and a hot water supplier.SOLUTION: Piping 13 just near a bath connection adapter 4 is provided with three-way valve 7, 8 on both a bathtub return side and a bathtub feed side, and a setting of a return to a bath and a setting of a shortcut bypassing the two three-way valves are prepared. While the temperature of hot water in the piping is measured, hot water returning from a water heater 3 is not sent to a bathroom 1, but returned to the water heater from the three-way valve by making a shortcut to the three-way valve of the bathtub feed side piping while the temperature is low. Once a rise in temperature of hot water to be supplied is detected, the hot water is fed to the bathtub.

Description

The present invention relates to a water heater that adjusts the flow of hot water in a bath tub or in a hot water outlet.

Traditionally, the chasing operation of a bathtub by a water heater or a water heater (hereinafter referred to as a water heater) connects the water heater and the connecting device for the bathtub (hereinafter referred to as a “bath connection adapter”) by piping, What is the hot water of the bathtub taken in from the bath connection adapter sent out using a pipe connected to the water heater (hereinafter referred to as the bathtub delivery pipe), warmed by the chasing operation with the water heater, and then sent to the water heater? The hot water in the bathtub is warmed by returning it to the bath connection adapter through a separately connected return pipe (hereinafter referred to as bathtub return pipe).

Since this structure can be connected to the hot water heater and the bathtub by connecting them with a pipe away from each other, it can be used for large water heaters and so on. Due to the fact that the hot water remaining in the bathtub return side piping was cooled at the time of the last boiling and chasing, there was a drawback that the cold water flowed into the tub at the start of chasing.

Similarly, for pipes that supply water from the water supply and discharge hot water from showers, faucets, currants, etc. (hereinafter referred to as hot-water appliances), when the hot water supply is started, In this case, when the hot water is supplied, the hot water having a low temperature may start to be supplied until the hot water starts to be supplied.

The effect of this phenomenon increases as the length of the pipe from the hot-water appliance to be used to the water heater increases.

Japanese Patent No. 3844113

Mitsubishi Natural Refrigerant Heat Pump Electric Water Heater "SRT-HP374WFZ" Instruction Manual Daikin Natural Refrigerant (CO2) Heat Pump Water Heater Eco Cute "EQ46MFV (E) (H)" Instruction Manual Daikin Natural Refrigerant (CO2) Heat Pump Water Heater, Installation Instruction "EQ46MFV (E) (H)"

When performing the chasing operation, before the start of the first operation, the hot water left in the bathtub return pipe after the previous boiling or chasing has finished, and the temperature of the hot water left in the bathtub return pipe through the pipe material over time. Water that has been deprived and has fallen in temperature remains in the pipe, and by performing additional cooking, this cold water flows into the bathtub in an amount corresponding to the length of the pipe immediately after the start of the additional operation. Come on.

This is because the longer the length of the pipe from the hot water supply device to the bathtub connection, the greater the length, and the last time the water was reheated or reheated, it was filled with hot water. Since the inside of the bathtub return pipe has stopped boiling water, the temperature has dropped due to the removal of heat due to the ambient temperature, etc. This is because hot water whose temperature in the pipe has dropped until it reaches. ("Non-patent document 1" is described in the third item of "Notice" at the bottom of page 24 of "Non-patent document 2" and "Notice" at the right part of page 21 of "Non-patent document 2")

Also, depending on the type of water heater, there are many that start the water boiling operation by detecting the flow of hot water in the hot water supply pipe at the start of hot water supply. In these water heaters, hot water is turned on again after the hot water supply is stopped. When starting, since boiling begins after the flow of water in the piping, although it is a short time before boiling begins, flowing water may come out without boiling. There is a case where a phenomenon (hereinafter referred to as a water sandwich phenomenon) occurs in which unwarmed water is sandwiched between hot water heated by the next water heater and hot water heated by the next water heater.

The phenomenon of water coming out at the beginning or midway of these chasing is uncomfortable when chasing while bathing, and when the piping connecting the bathtub and water heater is long, the temperature is low. In some cases, the temperature of the hot water in the bathtub is lowered due to the large amount of inflow of water.

In order to avoid this as much as possible, the piping between the water heater and the bathtub is wrapped with a heat insulating material (including heat insulating material) without any gaps, so that the inflow of water into the bathtub during chasing is minimized. Has been done. ("Non-patent document 3" page 14 right part "notes", the second item and the remarks in the table column on the same page described in heat insulation attachment)

However, in the treatment with the heat insulating material to the pipe, there is an effect to prevent the temperature of the water from dropping somewhat by chasing at a short time interval, but after a little time has passed, until the effect of the heat insulating material is hardly felt, Cold water will flow into the bathtub.

Regarding the temperature drop at the time of chasing, there is an invention described in “Patent Document 1” for the purpose of preventing accidents in which water in the pipe freezes due to low temperatures in winter, and the temperature drop of hot water in the pipe is already well known. It is a fact, but the inflow of water that falls in the pipe when chasing is only for temporary discomfort, so it is strongly recommended that the user endure without particularly improving the water heater There is a current situation.

further. The occurrence of the water sandwich phenomenon cannot be improved by preventing it with a heat insulating material, and may be particularly worrisome due to the high temperature difference from the hot water that comes out.

Therefore, an object of the present invention is to provide a device in which water in a pipe that has been cooled and has conventionally entered the bathtub does not flow into the bathtub while the temperature is as low as possible.

For hot water supply equipment connected to the hot water supply equipment other than the hot water supply for the bathtub, as with the hot water supply equipment for the bathtub, the longer the length of the pipe from the hot water supply equipment to be used to the hot water supply, the lower the effect of the pipe temperature drop. As for the temperature drop of this hot water, as with the temperature drop in the piping related to the hot water supply for bathtubs, as a general improvement measure, most of the measures such as wrapping a heat insulating material around the pipe are small. It was.

A bath connection adapter hot water supply side connection part that can be connected to a hot water supply side pipe connection part from a hot water heater of a connection bath connection adapter attached to the bathtub for connection to a hot water supply pipe;
A bathtub return pipe three-way valve connected to one of the two connections other than the common side by a pipe from the bath connection adapter hot water supply side connection;
The hot water supply hot water supply side connection part which can be connected to the common side connection port of the bathtub return pipe three-way valve via the hot water supply hot water supply side pipe on the hot water supply side of the water heater,
And the bath connection adapter intake side connection part that can be connected to the connection part of the intake side piping that sends hot water to the water heater of the bath connection adapter,
A bathtub delivery pipe side three-way valve connected by piping from the bath connection adapter intake side connection part to one of the two connection parts other than the common side;
The common port of the bathtub delivery pipe side three-way valve has a water heater intake side connection that can be connected to a water heater intake side pipe on the water intake side of the water heater,
Further, of the two connecting portions other than the common side of the bathtub return piping three-way valve, one connecting portion excluding the connecting portion connected by piping from the bath connecting adapter hot water supply side connecting portion, and the bathtub delivery piping side Of the two connection parts other than the common side of the three-way valve, it has a shortcut connection pipe that connects one connection part other than the connection part connected by piping from the bath connection adapter intake side connection part,
Bath connection auxiliary piping with temperature sensor in the piping from the hot water supply side piping of the bathtub piping of the water heater to the common side connection of the bathtub return piping 3-way valve

A hot water outlet piping connection connected to a pipe leading to the hot water outlet piping;
A hot water start control three-way valve connected by piping from the hot water appliance piping connection to one of the two connections other than the common side;
The hot water supply start control three-way valve has a common side connection port having a hot water supply hot water supply side connection portion that can be connected to a hot water supply hot water supply device on the hot water supply side of the hot water supply device.
And the water pipe connection pipe part which can be connected to the water pipe connection pipe,
A water supply regulating three-way valve connected by piping from the water pipe connecting piping part to one of the two connecting parts other than the common side;
A water heater that can be connected to a water supply water supply water pipe on the water supply side of a water heater equipped with a function of a water flow pump or the like at the common side connection port of the water supply adjustment three-way valve. Has a water pipe connection for water supply,
Further, of the two connecting portions other than the common side of the hot water start control three-way valve, one connecting portion excluding the connecting portion connected by piping from the hot water appliance piping connection, and the water supply adjusting three-way valve Of the two connection parts other than the common side, it has a shortcut connection pipe that connects one connection part excluding the connection part connected by piping from the water pipe connection pipe part,
Bath connection auxiliary pipe provided with a temperature sensor in the pipe from the hot water supply pipe connection section of the hot water supply equipment connection pipe of the water heater to the common side connection section of the hot water start control three-way valve

According to the present invention, in a device for discharging hot water from a water heater, such as a bath connection adapter or a hot water supply device, the hot water whose temperature is adjusted by the water heater comes out from the start of hot water supply, It is possible to reduce the amount of water that has not been adjusted by the water heater this time.

It is the conceptual diagram which simplified the concept of this invention. It is an example of the simple operation | movement principle of the three-way valve used for this invention. It is a figure when the three-way valve of FIG. 2 switches to the channel | path of the reverse direction side. It is a figure of the example of piping of this invention created with the three-way valve of the shape of FIG. It is a principle diagram when the three-way valve is in the circulation position. It is a principle diagram when the three-way valve is in the chasing hot water supply position. It is an operation | movement flow when operation | movement is started by this invention. It is a figure which shows the example at the time of integrating the structure of this invention with the bath connection adapter. It is an application structure to the hot water supply apparatus piping of this invention. 10 is an operation flow when the operation of the structure of FIG. 9 is started. It is a piping state figure at the time of a three-way valve hot water supply mode. It is a piping state figure when a three-way valve is in circulation mode.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In a normal water heater, in order to connect a water heater and a bathtub, it is connected by a connection tool called a bath connection adapter or the like, and is connected to the water heater by piping.

In the hot water supply side piping, hot water that was warmed at the time of the previous hot water supply or chasing is accumulated and remains, but by first chasing by depriving the temperature by air etc. by the next chasing time, For a while, cold water may flow from the bath connection adapter to the bathtub, and you may feel uncomfortable when taking a bath.

In addition, the longer the hot water supply side pipe is, the greater the amount of water flowing out at the start of chasing, and the greater the influence.

In order to prevent this, in FIG. 1, an electric bathtub return pipe three-way valve 8 is provided on the hot water supply side, and a bathtub feed pipe side three-way valve 7 is provided on both intake water pipes, near the connection portion of the bath connection adapter 4. Further, a temperature sensor 9 is attached to the hot water heater side from the bathtub return pipe three-way valve 8 of the hot water supply side pipe. By referring to the value detected by the temperature sensor 9, the control circuit that operates the bathtub return pipe three-way valve 8 and the bathtub delivery pipe side three-way valve 7 sets the value of the temperature sensor 9 to the set temperature or If the temperature does not reach the reference temperature, the three-way valve 8 blocks the passage to the bath connection adapter, passes through the pipe 13 that is short-cut without passing through the bathtub, passes through the three-way valve 7 on the intake pipe side, and passes through the three-way valve 7 on the intake side. It will be in the state of FIG.

As a result, the chasing operation is started without the temperature-decreasing water accumulated in the pipe when the chasing operation starts.

After that, when the value of the temperature sensor reaches the set temperature or the reference temperature, the bathtub return pipe three-way valve 8 shuts off the path to the pipe 13 that shortcuts the bathtub, and at the same time opens the path to the bath connection adapter. As a result of the chasing operation, it becomes a principle that the chasing hot water whose temperature has risen comes out of the bath connection adapter, and the state becomes as shown in FIG.

The plurality of three-way valves used at this time are not particularly limited to the operation principle as long as they can be controlled by the value of the temperature sensor 9 such as an electrically operated valve. As an example, as shown in FIG. It may operate based on various principles.

In the case of FIG. 2, the movable part 26 is currently on the left side, the common side connection part 28 and the three-way valve switching A side connection part 29 are connected, and the three-way valve switching B side connection part 30 is cut off. By controlling the voltage applied to the direction valve driving coil B operation wire 23 and the three-way valve driving coil A operation wire 24, the movable portion 26 moves to the right as shown in FIG. The three-way valve switching B-side connection portion 30 corresponding to the secondary side is connected, and the three-way valve switching A-side connection portion 29 corresponding to the other secondary side is blocked.

Thus, the common side connection part 28 and the three-way valve switching A side connection part 29 or the common side connection part 28 and the three-way valve switching B side connection part 30 can be switched.

FIG. 4 shows an example in which this three-way valve is applied to the diagram of FIG. 4 illustrates the movement of the bathtub feed pipe side three-way valve 7 and the bathtub return pipe three-way valve 8 in FIG. 4 and the flow of hot water sent from the hot water supply device 3 of the water heater. FIG. 5 shows a state that is in a state of being chased, and FIG. 6 shows a state in which the value of the temperature sensor 9 is low, the pipe to the bathtub is shut off, and the chasing shortcut pipe 13 is turning back.

As a second embodiment using the bath connection auxiliary pipe of the present invention, as a water heater, there are many that perform an operation to prevent freezing of water in the pipe at a low temperature such as at night in winter as a freeze prevention operation. Since this anti-freezing operation is an application of weak chasing operation, it is often a condition that it is necessary to put remaining hot water or the like up to a position higher than the bath connection adapter 4 of the bathtub.

However, by using the bath connection auxiliary pipe of the present invention, the connection to the bathtub delivery pipe 5 and the bathtub return pipe 6 connected to the bathtub side is cut off from the bathtub delivery pipe side three-way valve 7 and the shortcut pipe 13 is passed. Thus, the operation of preventing freezing can be performed even when there is no hot water in the bathtub except in the extremely low temperature where the inside of the bathroom is below freezing.

FIG. 8 shows an example in which the bath connection adapter and the bath connection auxiliary pipe are integrated, and the distance from the bath connection adapter to the bathtub return pipe three-way valve 8 can be shortened as much as possible. However, there is a slight drop in the temperature of the hot water that remains between the bath connection adapter and the bath return auxiliary pipe three-way valve 8 of the bath connection auxiliary pipe that cannot be prevented. By integrating, only hot water remaining in a very short pipe in a portion very close to the bathtub can be obtained, and in fact, only a very small amount of water can flow in.

The pipe closest to the bath connection adapter has a three-way valve on both the bathtub return side and the bathtub feed side, and a setting to return to the bath and a setting to shortcut the two three-way valves with the pipe, and measure the temperature of hot water in the pipe However, while the temperature is low, the hot water returning from the water heater is not sent to the bathtub, but is short-cut from the three-way valve to the three-way valve of the bathtub feed side piping and returned to the water heater, and as soon as the hot water temperature rises, 3 Switch the direction valve and feed it into the bathtub.

FIG. 9 shows an example in which a part of the pipe shown in FIG. 1 mentioned in Example 1 is changed and the pipe connected to the bath connection adapter of the bathtub is connected to the hot water supply equipment. When hot water is used, the temperature of the hot water drops in the piping, and when the hot water is turned off and left for a while, the hot water is kept out until the hot water is stable. be able to.

In the control by the signal of performing the hot water operation by the hot water operation switch 33, the water supply adjusting three-way valve 47 is in a state where the water channel on the side connected to the water flow pump 37 on the common side and the follow-up shortcut pipe 13 are open. The water channel connected to the water pipe connection piping 45 is in a closed state, the hot water start control three-way valve 48 is opened on the piping side water channel to which the temperature sensor 9 for hot water temperature on the common side is attached, and the follow-up shortcut piping 13 is opened. In the state, the water channel connected to the hot-water supply appliance connection pipe 46 is closed.

After a device for generating a water flow (hereinafter referred to as a “water flow pump”) is activated to start generating a water flow, the hot water temperature sensor 9 measures the temperature without piping and the hot water supply device 3 of the water heater is applicable. Start boiling water for the appliance.

The hot water in the pipe whose temperature has risen due to the water flow by the water flow pump 37 and the hot water by the hot water supply device 3 of the water heater is converted into a water pipe 39 by a shortcut pipe by the water supply adjustment three-way valve 47 and the hot water start control three-way valve 48. The temperature measured by the hot water temperature sensor 9 is increased in advance by raising the temperature of the hot water in the pipe without receiving the supply of water from the water and without sending the water to the hot water supply equipment connection pipe 46. When the set temperature is reached, the water supply adjustment three-way valve 47 opens and connects the water channel on the side connected to the water pump 37 on the common side and the water pipe connection piping 45 to follow the short cut piping. 13 is closed, and the hot water start control three-way valve 48 further connects the hot water temperature sensor 9 on the common side to the water channel on the pipe side and the hot water supply appliance connection pipe 46 to add additional water. Close the connection to the fired shortcut pipe 13 side.

The water supply adjustment three-way valve 47 that stopped the water flow from the water pipe 39 started supplying water to the water heater by the water pressure from the water pipe 39,
The hot water start control three-way valve 48 that has blocked the water flow to the hot water supply device connection pipe 46 starts supplying hot water to the hot water supply device body 31.

At this time, although there is a time lag in the time from the hot water operation to the actual hot water, the hot water that has fallen in temperature has accumulated between the tip of the hot water appliance and the hot water start control three-way valve 48. Only hot water.

The operation flow of the three-way valve and the water flow at the start of operation is as shown in FIG. 10, but this represents a simple pattern and does not necessarily stick to this operation flow.

On the hot water supply side and the water intake side of the pipe connecting the bathtub piping from the bathtub and the water heater, a three-way valve driven by electricity with the water heater side in common is arranged. The secondary side connection port is connected to the bath connection adapter side on both the hot water supply side and the intake side, and the remaining secondary connection port is one of the remaining three-way valves on the hot water supply side and the intake side. Connect.

A temperature sensor such as a thermistor that can measure the temperature is attached to the pipe on the hot water supply side of the three-way valve on the hot water supply side pipe. Electricity is controlled so that the operation of the three-way valve can be controlled when the set temperature is exceeded. Prepare a control circuit.

By switching the flow path of the three-way valve by connecting the bathtub piping to the H type, the hot water flow in the bathtub piping when operating as usual is set by the flow setting. As a result, the temperature is raised by the chasing operation in the hot water heater, and the operation returns from the hot water supply pipe through the bath connection adapter to the bathtub.

Then, when the chasing operation is started after stopping for a certain time, the temperature sensor detects that the temperature in the pipe is low, and the hot water supply side in the middle connected in an H shape by a three-way valve It runs through a pipe connected to the water intake side three-way valve, drains water from the bath connection adapter of the bathtub, and does not take water from the bathtub, but performs a follow-up operation in the form of a shortcut to the pipe that does not pass through the bath connection adapter.

In the case of chasing without taking water from the bathtub that does not pass through the bath connection adapter, the temperature immediately rises and when the set temperature is reached, the temperature sensor placed in the hot water supply pipe detects the hot water temperature and the control circuit supplies hot water. The three-way valve on the side and the water intake side is operated, and the flow path to the pipe connecting the two three-way valves is blocked by the three-way valve, so that a normal hot water supply operation of taking water and hot water from the bath connection adapter is performed.

The present invention is an invention applied to a hot water supply apparatus which waits for hot water supply until the temperature of the hot water rises during operation of the hot water supply apparatus, and allows the hot water to be discharged after the temperature has warmed.

DESCRIPTION OF SYMBOLS 1 Bathtub structure 2 Hot water surface filled in bathtub 3 Hot-water supply device of water heater 4 Bath connection adapter 5 Bathtub feed pipe 6 Bathtub return pipe 7 Bathtub feed pipe side 3-way valve 8 Bathtub return pipe 3-way valve 9 Hot water Temperature sensor 10 Three-way valve control electrical device 11 Water heater tub delivery piping connection 12 Water heater tub return piping connection 13 Follow-up shortcut piping 14 Water flow direction arrow 15 Hot water supply piping 21 Three-way valve drive coil B
22 3-way valve drive coil A
23 Three-way valve driving coil B operation wiring 24 Three-way valve driving coil A operation wiring 25 Three-way valve main body 26 Three-way valve moving part 27 Three-way valve moving part driving magnet 28 Three-way valve common connection part 29 3-way valve switching A-side connection part 30 3-way valve switching B-side connection part 31 Hot spring body 32 Shower hose (in the case of shower)
33 Hot water operation switch 34 Signal terminal 36 for hot water operation switch Check valve 37 Water pump 38 Water pump operation wiring terminal 39 Water pipe (to local water supply)
45 Water pipe connection pipe 46 Hot water supply connection pipe 47 Water supply adjustment three-way valve 48 Hot water start control three-way valve 51 Water supply water supply water supply pipe connection 52 Water heater supply water supply hot water supply pipe connection 53 Water pipe connection pipe

Claims (2)

A bath connection adapter hot water supply side connection part that can be connected to a hot water supply side pipe connection part from a hot water heater of a connection bath connection adapter attached to the bathtub for connection to a hot water supply pipe;
A bathtub return pipe three-way valve connected to one of the two connections other than the common side by a pipe from the bath connection adapter hot water supply side connection;
The hot water supply hot water supply side connection part which can be connected to the common side connection port of the bathtub return pipe three-way valve via the hot water supply hot water supply side pipe on the hot water supply side of the water heater,
And the bath connection adapter intake side connection part that can be connected to the connection part of the intake side piping that sends hot water to the water heater of the bath connection adapter,
A bathtub delivery pipe side three-way valve connected by piping from the bath connection adapter intake side connection part to one of the two connection parts other than the common side;
The common port of the bathtub delivery pipe side three-way valve has a water heater intake side connection that can be connected to a water heater intake side pipe on the water intake side of the water heater,
Further, of the two connecting portions other than the common side of the bathtub return piping three-way valve, one connecting portion excluding the connecting portion connected by piping from the bath connecting adapter hot water supply side connecting portion, and the bathtub delivery piping side Of the two connection parts other than the common side of the three-way valve, it has a shortcut connection pipe that connects one connection part other than the connection part connected by piping from the bath connection adapter intake side connection part,
Bath connection auxiliary piping with temperature sensor in the piping from the hot water supply side piping of the bathtub piping of the water heater to the common side connection of the bathtub return piping 3-way valve A hot water outlet piping connection connected to a pipe leading to the hot water outlet piping;
A hot water start control three-way valve connected by piping from the hot water appliance piping connection to one of the two connections other than the common side;
The hot water supply start control three-way valve has a common side connection port having a hot water supply hot water supply side connection portion that can be connected to a hot water supply hot water supply device on the hot water supply side of the hot water supply device.
And the water pipe connection pipe part which can be connected to the water pipe connection pipe,
A water supply regulating three-way valve connected by piping from the water pipe connecting piping part to one of the two connecting parts other than the common side;
A water heater that can be connected to a water supply water supply water pipe on the water supply side of a water heater equipped with a function of a water flow pump or the like at the common side connection port of the water supply adjustment three-way valve. Has a water pipe connection for water supply,
Further, of the two connecting portions other than the common side of the hot water start control three-way valve, one connecting portion excluding the connecting portion connected by piping from the hot water appliance piping connection, and the water supply adjusting three-way valve Of the two connection parts other than the common side, it has a shortcut connection pipe that connects one connection part excluding the connection part connected by piping from the water pipe connection pipe part,
Bath connection auxiliary pipe provided with a temperature sensor in the pipe from the hot water supply pipe connection section of the hot water supply equipment connection pipe of the water heater to the common side connection section of the hot water start control three-way valve

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