JP2008281260A - Mixing branch valve and hot water storage type water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize a hot water supply tank unit 1. <P>SOLUTION: This mixing branch valve has a body portion provided with a first inflow port communicated with a hot water supply pipe, a second inflow port communicated with a water supply bypass pipe, and a hot water supply outflow port and a hot water filling outflow port for allowing the mixed hot water/water to flow out, a hot water supply valve communicating the first and second inflow ports and the hot water supply outflow port, and a hot water filling valve communicating the first and second inflow ports and the hot water filling outflow port, respectively formed in the body portion, and further a hot water supply valve driving means for driving the hot water supply valve and adjusting a mixing ratio of hot water and water, and a hot water supply valve driving means for driving the hot water filling valve and adjusting a mixing ratio of the hot water and water are disposed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mixing branch valve that mixes fluids and a hot water storage hot water heater that mixes hot water stored using the mixing branch valve with hot water to supply hot water.

Conventionally, in this type of hot water heater, a hot water storage tank for storing hot water, a heating means for heating the hot water in the hot water storage tank, a water supply pipe for supplying water to the lower part of the hot water storage tank, and hot water discharged from the upper part of the hot water storage tank. Mixing of the hot water pipe, the intermediate hot water pipe from the intermediate part of the hot water storage tank, the feed water bypass pipe branched from the feed water pipe, the hot water from the hot water pipe, the hot water from the intermediate hot water pipe and the water from the feed water bypass pipe A hot water heater with a mixing valve that mixes hot water from the hot water outlet and hot water from the intermediate hot water pipe, or hot water from the intermediate hot water pipe and water from the water supply bypass pipe. Mixed hot water was possible. (For example, see Patent Document 1)
JP 2005-331175 A

  However, in this conventional type, the same hot water supply pipe is used for hot water supply and bath hot water filling, so when using hot water during hot water filling of the bath, the bath temperature is given priority and the user's favorite hot water temperature Could not be used.

  The present invention pays attention to this point, and in order to solve the above-mentioned drawbacks, in particular, the structure is supplied with a hot water storage tank for storing hot water, heating means for heating the hot water in the hot water storage tank, and water supplied to the lower part of the hot water storage tank. Mixing a water supply pipe, a hot water discharge pipe that is discharged from the upper part of the hot water storage tank, a water supply bypass pipe that is branched from the water supply pipe and bypasses the hot water storage tank, hot water from the hot water supply pipe, and water from the water supply bypass pipe A hot water storage type hot water heater having a mixing branch valve that is configured to discharge a mixed hot water from a first inflow port that communicates with a tapping pipe, a second inflow port that communicates with the feed water bypass pipe, and A body portion in which a hot water supply / outflow port and a hot water outflow port are formed, a hot water supply valve formed in the body portion and communicating the first and second inflow ports and the hot water outflow port, 1. A hot water valve that communicates the second inflow port and the hot water outflow port is provided, a hot water valve driving means that drives the hot water valve to adjust the mixing ratio of hot water, and the hot water valve is driven. Hot water filling valve driving means for adjusting the mixing ratio of hot and cold water.

  A hot water storage tank for storing hot water, heating means for heating the hot water in the hot water storage tank, a water supply pipe for supplying water to the lower part of the hot water storage tank, a hot water discharge pipe for discharging hot water from the upper part of the hot water storage tank, and the hot water storage tank Mixing the intermediate hot water outlet pipe from which the hot water is discharged from the intermediate portion, the water supply bypass pipe branched from the water supply pipe and bypassing the hot water storage tank, the hot water from the hot water outlet pipe or the intermediate hot water pipe and the water from the water supply bypass pipe A hot water storage type water heater having a mixing branch valve, wherein the mixing branch valve communicates with a first inflow port with which a tapping pipe communicates, a second inflow port with which the feed water bypass pipe communicates, and the intermediate tapping pipe. The body part in which the 3rd inflow port, the hot water supply outflow port which discharges the hot water mixed with hot water supply temperature, and the hot water outflow port which flows out the hot water mixed with the bath hot water temperature are formed The first inflow port is closed and the opening ratio of the second inflow port and the third inflow port is changed, or the second inflow port is closed and the first inflow port and the third inflow port are formed. The hot water valve driving means for adjusting the mixing ratio of hot water and the hot water valve by closing the first inflow port and varying the open ratio of the second inflow port and the third inflow port. Or a filling valve driving means for closing the second inflow port to vary the opening ratio of the first inflow port and the third inflow port and driving the hot water filling valve to adjust the mixing ratio of hot water and water. Is.

  A body portion having a first inflow port, a second inflow port, a third inflow port, a hot water supply outflow port, and a hot water outflow port; and a body portion formed in the body portion; The opening ratio between the inflow port and the third inflow port is varied, or the second inflow port is closed to vary the opening ratio between the first inflow port and the third inflow port, and the hot water supply valve is driven to mix the hot water and the water. A hot water supply valve drive means for adjusting the first inlet port and the opening ratio of the second inlet port and the third inlet port are varied by closing the first inlet port, or the first inlet port and the third inlet port are closed by closing the second inlet port There is provided a filling valve driving means for changing the opening ratio of the port and driving the filling valve to adjust the mixing ratio of the hot water and the water.

  In addition, a cylindrical body portion is formed, and the inside of the body portion is divided into three chambers of a central chamber and two end chambers by two disks, and the central chamber is further divided into three chambers, a first inlet port, Two inflow ports and a third inflow port are formed, a hot water supply / outflow port is formed in one of the two end chambers, and a hot water outflow port is formed in the other, and the disk is rotatable and communicated with an appropriate size. A hole is provided, and the two discs are connected to a hot water supply valve driving means and a hot water valve driving means by a rotating shaft, respectively, and the mixing ratio of hot water and water is adjusted by the hot water valve driving means and the hot water valve driving means, respectively. It is a thing.

According to this invention, it is possible to perform hot water supply and hot water filling at two different set temperatures at the same time with one mixing branch valve, so that the reliability of control is improved and the hot water temperature and hot water temperature can be stabilized. It will be very easy.
In addition, the structure of the hot water supply valve and the hot water filling valve is made into a disk shape, so that the contact area with the body portion is reduced, the valve can be driven more smoothly, and failure due to adhesion of dust etc. can be reduced. become able to.
Moreover, by providing a large cylindrical room after mixing hot water, the mixing of hot water is promoted, and the fluctuation range of hot water supply temperature and hot water filling temperature is reduced.

Next, an embodiment of the present invention will be described with reference to FIG.
This hot water heater is used to boil and store hot water in the midnight hours when the unit price of contracted electricity by time is low, and to use this hot water for hot water supply. 1 is a hot water storage tank 2 for storing hot water. 3 is a heating means such as a heat pump unit for heating hot water in the hot water storage tank, 4 is a hot water tap provided in a kitchen or a washroom, 5 is a remote control for setting a hot water supply set temperature, 6 is a bathtub.

  The hot water storage tank 2 of the hot water storage tank unit 1 has a hot water discharge pipe 7 connected to the upper end, a water supply pipe 8 connected to the lower end, a heat pump forward pipe 10 constituting a heat pump circulation circuit 9 at the lower part, and a heat pump circulation circuit at the upper part. 9 is connected to the heat pump return pipe 11, the hot water in the hot water storage tank 2 taken out from the heat pump forward pipe 10 is heated by the heating means 3, returned from the heat pump return pipe 11 to the hot water storage tank 2, and stored. Hot water in the hot water storage tank 2 is pushed up by water supply from the water supply pipe 8, and high temperature water in the upper part of the hot water storage tank 2 is pushed out from the hot water discharge pipe 7 to supply hot water. In addition, 12 is a pressure reducing valve provided in the water supply pipe 8 to reduce the water supply pressure to a predetermined value, 13 is a water supply temperature sensor provided in the water supply pipe 8 to detect the temperature of the water supply, and 14 is hot water storage provided in the middle of the tap water pipe 7. This is an overpressure relief valve that releases overpressure in the tank 2.

  The heating means 3 includes a compressor 15, a refrigerant-water heat exchanger 16 as a condenser, an electronic expansion valve 17, a heat pump circuit 19 including a forced air-cooled evaporator 18, and hot water in the hot water storage tank 2. A heat pump circulating pump 20 that circulates to the refrigerant-water heat exchanger 16 through the heat pump forward pipe 10 and the heat pump return pipe 11 and a heat pump control unit 21 that controls driving thereof are provided. Is one in which carbon dioxide is used as a refrigerant to constitute a supercritical heat pump cycle. Since carbon dioxide is used as the refrigerant, low-temperature water can be boiled up to a high temperature of about 90 ° C. without an electric heater.

  Next, 22 is a bath heat exchanger composed of a stainless steel snake tube for heating the hot water in the bathtub 6, and the bath heat exchanger 22 has a bath return pipe 23 and a bath return pipe having a bath circulation pump 24. A bath circulation circuit 26 having 25 is connected so that the hot water in the bathtub 6 can be circulated, and the hot water in the bathtub 6 is heated by the high-temperature water in the hot water storage tank 2 to be kept warm or chased. Reference numeral 27 denotes a bath temperature sensor for detecting the temperature of hot water in the bathtub 6 circulating through the bath return pipe 25. The bath circulation pump 24 is driven when a bath warming command or a warming command is issued. When the bath temperature sensor 27 detects a desired temperature, the bath circulation pump 24 is stopped and the operation is completed. At this time, the temperature of the hot water below the uppermost portion of the bath heat exchanger 22 is lowered by heat exchange with the bath water.

  Next, 28 is an intermediate hot water pipe connected to an intermediate position of the hot water storage tank 2, and heat transfer is performed in the vicinity of the boundary layer of medium-temperature water or hot water / water whose temperature has decreased due to heat exchange with the bath side in the bath heat exchanger 22. The hot water stored in the intermediate position of the hot water storage tank 2 such as medium hot water whose temperature is lowered or increased due to the hot water is discharged from the hot water storage tank 2.

Next, 29 is a water supply bypass pipe branched from the water supply pipe 8 to bypass the hot water storage tank 2, and 30 is hot water from the hot water discharge pipe 7, hot water from the intermediate hot water supply pipe 28, and water from the water supply bypass pipe 29. A hot water pipe 31 and a hot water pipe 32 are provided downstream of the mixed branch valve 30, and a hot water temperature sensor 33 is provided in the hot water pipe 31. 34 is a hot water temperature sensor provided in the hot water pipe 32, and 35 is a hot water flow rate counter for counting the amount of hot water to be bathed.
The hot water filling pipe 32 is connected to the bath circulation circuit 26, a hot water filling valve 36 for starting / stopping hot water filling to the bathtub 6, and a backflow prevention means 37 such as a check valve for preventing a reverse flow to the bathtub 6. Is provided.

  Next, a plurality of hot water storage temperature sensors 38 are arranged in the vertical direction of the hot water storage tank 2. In this embodiment, five hot water storage temperature sensors are arranged and are called 38 a, 38 b, 38 c, 38 d, 38 e from the top. The amount of heat remaining in the hot water storage tank 2 is detected based on the temperature information detected by the temperature sensor 38, and the vertical temperature distribution in the hot water storage tank 2 is detected.

  Reference numeral 39 denotes a control unit having a microcomputer for receiving the input of each sensor in the hot water tank unit 1 and controlling the drive of each actuator. The remote controller 5 is connected to the control unit 39 by radio or wire so that the user can set an arbitrary hot water supply set temperature and bath set temperature. The control unit 39 controls the mixing branch valve 30 so that the temperature detected by the hot water supply temperature sensor 33 at the time of hot water supply becomes a set temperature, or the heat pump control unit 21 so that the hot water in the hot water storage tank 2 boils at midnight. Is used to instruct a boiling command.

  Next, the boiling operation will be described. When the hot water storage temperature sensor 38 detects that the necessary amount of heat does not remain in the hot water storage tank 2 in the midnight power time zone, the control unit 39 instructs the heat pump control unit 21. In response, a boiling start command is issued. Upon receiving the command, the heat pump controller 21 starts driving the heat pump circulation pump 20 after starting the compressor 15, and cools the low temperature water of about 5 to 20 ° C. taken out from the heat pump forward pipe 10 connected to the lower part of the hot water storage tank 2 as a refrigerant. -Heated to a high temperature of about 70 to 90 ° C by the water heat exchanger 16, returned to the hot water storage tank 2 from the heat pump return pipe 11 connected to the upper part of the hot water storage tank 2, and stacked in order from the upper part of the hot water storage tank 2 Store hot water. When the hot water storage temperature sensor 38 detects that the necessary amount of heat has been stored, the control unit 39 issues a boiling stop command to the heat pump control unit 21, and the heat pump control unit 21 stops the compressor 15 and the heat pump circulation pump. 20 is also stopped and the boiling operation is completed. In the hot water storage tank 2, high temperature water is stored in the upper part and low temperature water is stored in the lower part. A difference in specific gravity occurs due to the temperature difference, and a high temperature water having a low specific gravity is formed in the upper part by forming a temperature boundary layer. Since the low-temperature water with a high specific gravity is located at the lower part, they do not mix with each other.

  Next, the hot water supply operation will be described. When the hot water tap 4 is opened, the water supplied from the water supply pipe 8 flows into the hot water storage tank 2. Then, the high-temperature water present in the hot water storage tank 2 is pushed out to the fluid mixing valve 30. At the same time, the feed water from the feed water bypass pipe 29 also flows into the fluid mixing valve 30 and is mixed with the set temperature to supply hot water.

Here, the mixing branch valve 30 in the case where the intermediate hot water supply pipe 28 does not supply the intermediate hot water will be described in detail with reference to FIGS.
2 is a perspective view of the mixing branch valve 30, FIG. 3 is a front sectional view, FIG. 4 is a sectional view taken along the line AA in FIG. 3, and FIG. In the body portion, a first inflow port 41 communicating with the hot water discharge pipe 7, a second inflow port 42 communicating with the water supply bypass pipe 29, a hot water supply outflow port 43 communicating with the hot water supply pipe 31, and a hot water filling pipe 32. The first and second inflow ports 41 and 42 and the hot water supply / outflow port 43 are communicated with each other by a hot water supply valve 45. The hot water supply valve 45 is a hot water supply valve driving means comprising a step motor. The hot water supply at the required temperature is performed by adjusting the mixing ratio of hot water at 46. The first and second inflow ports 41 and 42 and the hot water outflow port 44 are communicated with a hot water fill valve 47. The hot water fill valve 47 is mixed with hot water by a hot water fill valve driving means 48 comprising a step motor. The hot water filling is performed by adjusting the temperature. The first inflow port 41 and the second inflow port 42 are provided to face each other, and the mixing ratio of the hot water and the water varies depending on the opening of the communication ports 49 and 50 of the hot water supply valve 45 and the hot water filling valve 47 provided at the junction of the hot water and the water, respectively. Hot water having a required hot water temperature can be supplied from the hot water supply / outflow port 43 and hot water having a required hot water temperature can be simultaneously supplied from the hot water outflow port 44 at different temperatures.

  Cylindrical valve chambers 51 and 52 at right angles to the outflow ports 43 and 44 at the intersections where the first and second inflow ports 41 and 42 and the outflow ports 43 and 44 communicate with each other in the body portion 40. The valve bodies 53 and 54 are disposed in the valve chambers 49 and 50, respectively. The valve bodies 53 and 54 have a hollow cylindrical shape with the outflow ports 43 and 44 open, and the communication ports 49 and 50 are formed by opening a part of the peripheral wall.

  The valve drive means 46 and 48 are controlled by the control unit 39, and the control unit 39 determines the standby angle of the valve body 45 during hot water supply standby according to the temperature detected by the hot water storage temperature sensor 38, The drive means 47 is driven to rotate the valve bodies 53 and 54 to the determined angle to stand by.

Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, the same thing as previous one Embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description.
6 is a cross-sectional view of the front of the mixing branch valve 30, FIG. 7 is a cross-sectional view taken along the line BB of FIG. 6, 55 is a third inflow port connected to the intermediate tap pipe 28, and as shown in FIG. The first inflow port 41, the third inflow port 55, and the second inflow port 42 are provided side by side with the valve bodies 53 and 54 as the center, and the controller 39 detects the temperature detected by the intermediate hot water storage temperature sensor 56 as the remote controller 5 or the like In the state higher than the set temperature set in step 3, the communication ports 49 and 50 of the valve bodies 53 and 54 are connected to the second inflow port 42 that communicates with the feed water bypass pipe 29 and the third inflow port 55 that communicates with the intermediate outlet pipe 28. The valve drive means 46 and 48 are driven to wait so that the valve bodies 53 and 54 are made to stand by at an angle at which the opening ratio of the two ports is variably opened, and the temperature detected by the intermediate hot water temperature sensor 56 is set by the remote controller 5 If the temperature is below the set temperature The valve drive means 46 and 48 are driven to wait so that the valve bodies 53 and 54 are made to stand by at an angle in which the opening ratio of the two ports of the first inflow port 41 communicating with the third inflow port 55 and the hot water pipe 7 is variably opened Like to do.

  Then, when hot water supply or hot water filling is started, the controller 39 controls the valve drive means so that the hot water temperature sensor 33 and the hot water temperature sensor 34 detect the set temperature set by the remote controller 5 or the like during hot water supply or hot water filling. 46 and 48 are driven according to each set temperature to adjust the rotation angle of the valve bodies 53 and 54.

  In this way, it is possible to supply hot water and fill water at two set temperatures at the same time by using the middle temperature water in the intermediate portion of the hot water storage tank 2 in preference to the hot water in the upper portion of the hot water storage tank 2 by the single mixing branch valve 30. It was possible to reduce the product cost of hot water storage water heaters. Also, in the case of controlling two conventional mixing valves connected in series, changing the opening degree of the mixing valve upstream of the flow affects the control of the downstream mixing valve. Although it has been difficult to stabilize the hot water supply temperature, in the present invention, hot water supply and hot water filling at two set temperatures can be performed simultaneously by one mixing branch valve 30, so that the reliability of control is improved and hot water supply is performed. It becomes very easy to stabilize the temperature.

  Further, since the standby position of the mixing branch valve 30 in the hot water supply standby state is changed according to the temperature of the intermediate portion of the hot water storage tank 2, the arrival time from the start of hot water supply until the set temperature is reached is shortened. The undershoot of the temperature is reduced, the rising performance of the hot water supply temperature is improved, and a hot water storage water heater with a better feeling of hot water supply can be obtained.

  Next, a third embodiment of the present invention will be described with reference to FIGS. In addition, the same thing as previous one Embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description.

  8 is a front sectional view of the mixing and branching valve 30, FIG. 9 is a sectional view taken along the line CC of FIG. 8, and FIG. 10 is an explanatory perspective view around the hot water supply valve 45. In this embodiment, the body portion 40 is a cylinder. The body 40 is divided into three chambers by a central chamber 59 and end chambers 60 and 61 by two rotatable discs 57 and 58. The central chamber 59 is further divided into three chambers in the axial direction of the cylinder by a partition plate 62, and a first inflow port 41, a second inflow port 42, and a third inflow port 55 are formed in the three chambers, respectively.

  A hot water supply / outflow port 43 is formed in one of the end chambers 60 and 61, and a hot water outflow port 44 is formed in the other. Further, communication ports 49 and 50 are opened in the discs 57 and 58, and are connected to the driving means 46 and 48 by shafts 63 and 64. The mixing ratio of hot and cold water is controlled by the rotation angle of the discs 57 and 58. It adjusts and controls hot water supply temperature and hot water filling temperature, respectively.

  According to this embodiment, the structure of the hot water supply valve 45 and the hot water filling valve 47 is made into a disk shape, so that the contact area with the body portion 40 is reduced, and the valve can be driven more smoothly. Failure due to adhesion can be reduced.

  Further, by providing a large room after mixing of hot and cold water, the mixing of hot water and water is promoted, and the fluctuation range of hot water supply temperature and hot water filling temperature is reduced.

The schematic block diagram of one Example of this invention. The perspective view of the mixing branch valve of a 1st Example. Sectional drawing of the same front. AA sectional drawing of the same FIG. Sectional drawing of the right side surface. Sectional drawing of the front of the mixing branch valve of a 2nd Example. BB sectional drawing of the same FIG. Sectional drawing of the front of the mixing branch valve of a 3rd Example. CC sectional drawing of the same FIG. Explanatory perspective view around the hot water supply valve 45.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Hot water storage tank 3 Heating means 7 Hot water discharge pipe 8 Water supply pipe 28 Intermediate hot water supply pipe 29 Water supply bypass pipe 30 Mixing branch valve 38 Hot water storage temperature sensor 39 Control part 40 Body part 41 First inflow port 42 Second inflow port 43 Hot water supply outflow port 44 Hot water Tension outflow port 45 Hot water supply valve 46 Hot water supply valve driving means 47 Hot water filling valve 48 Hot water filling valve driving means 55 Third inflow port 56 Intermediate hot water storage temperature sensor 59 Central chamber 60 End chamber 61 End chamber

Claims (4)

  A hot water storage tank for storing hot water, heating means for heating the hot water in the hot water storage tank, a water supply pipe for supplying water to the lower part of the hot water storage tank, a hot water discharge pipe for discharging hot water from the upper part of the hot water storage tank, and a branch from the water supply pipe A hot water storage water heater comprising a water supply bypass pipe that bypasses the hot water storage tank, and a mixing branch valve that mixes hot water from the hot water discharge pipe and water from the water supply bypass pipe, the mixing branch valve being a hot water outlet A body part in which a first inflow port that communicates with the pipe, a second inflow port that communicates with the feed water bypass pipe, a hot water supply outflow port that allows mixed hot water to flow out, and a hot water outflow port; A hot water supply valve that communicates the first and second inflow ports with the hot water supply / outflow port, and a hot water fill valve that communicates with the first and second inflow ports and the hot water outflow port. A hot water supply valve driving means for adjusting the mixing ratio of hot water by driving the hot water supply valve; and a hot water valve driving means for adjusting the mixing ratio of hot water by driving the hot water filling valve. Hot water storage water heater.   A hot water storage tank for storing hot water, heating means for heating the hot water in the hot water storage tank, a water supply pipe for supplying water to the lower part of the hot water storage tank, a hot water discharge pipe for discharging hot water from the upper part of the hot water storage tank, and an intermediate between the hot water storage tanks An intermediate hot water discharge pipe for discharging hot water from a section, a water supply bypass pipe branched from the water supply pipe and bypassing the hot water storage tank, and a mixing branch for mixing hot water from the hot water discharge pipe or intermediate hot water discharge pipe and water from the water supply bypass pipe A hot water storage type water heater provided with a valve, wherein the mixing branch valve has a first inflow port that communicates with a tapping pipe, a second inflow port that communicates with the feed water bypass pipe, and a third in which the intermediate tapping pipe communicates. A body portion formed with an inflow port, a hot water supply / outflow port for discharging hot water mixed at the hot water supply temperature, and a hot water outflow port for discharging hot water mixed at the bath hot water temperature; Formed in the body portion, the first inflow port is closed to change an opening ratio of the second inflow port and the third inflow port, or the second inflow port is closed to open the first inflow port and the third inflow port. A hot water supply valve driving means for adjusting the mixing ratio of hot water and water by driving the hot water supply valve and closing the first inflow port to vary the opening ratio of the second inflow port and the third inflow port, or And a filling valve driving means for closing the second inflow port to vary the opening ratio of the first inflow port and the third inflow port and driving the hot water filling valve to adjust the mixing ratio of hot water and water. A hot water storage type hot water heater.   A body portion in which a first inflow port, a second inflow port, a third inflow port, a hot water supply outflow port, and a hot water outflow port are formed, and is formed in the body portion, and the first inflow port is closed to close the second inflow port. And the third inflow port opening ratio are changed, or the second inflow port is closed to change the first inflow port and third inflow port opening ratio, and the hot water supply valve is driven to adjust the mixing ratio of hot water and water. The hot water supply valve driving means, and the first inflow port is closed to vary the opening ratio of the second inflow port and the third inflow port, or the second inflow port is closed to close the first inflow port and the third inflow port. A mixing branch valve comprising: a filling valve driving means that varies an opening ratio and drives the filling valve to adjust a mixing ratio of hot water.   A cylindrical body portion is formed, and the inside of the body portion is divided into three chambers of a central chamber and two end chambers by two disks, and the central chamber is further divided into three chambers, a first inflow port and a second inflow Forming a port, a third inflow port, a hot water supply / outflow port in one of the two end chambers, and a hot water outflow port in the other, the disk having a communication hole that is rotatable and appropriately sized. The two discs are connected to a hot water supply valve driving means and a hot water valve driving means by a rotating shaft, respectively, and the mixing ratio of hot water and water is adjusted by the hot water valve driving means and the hot water valve driving means, respectively. Mixing branch valve to do.

Images