JP6497499B2 - Hot and cold water mixing device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a hot and cold water mixing faucet device, and more particularly to a hot and cold water mixing faucet device used in cold districts for discharging hot water mixed with hot water supplied from a hot water supply source and water supplied from a water supply source. .

First, as a single water faucet device that is used in cold districts and stops water supplied from a water supply source, for example, in Patent Document 1, this water tap is connected to a water pipe, There is described a tap faucet provided with a plug function part for switching between water discharge and water stop and an intake valve provided between the connection part and the plug function part.
When this faucet is installed in a cold region, it is necessary to drain water at night to prevent the water inside the faucet body and water pipe from freezing. By operating the stopper to the drain side, water staying in the flow path is discharged. That is, when outside air is sucked into the flow path from the intake valve, the water staying in the flow path from the downstream side of the drain plug to the upstream side of the tap function part of the tap is discharged. It has become.
On the other hand, on the downstream side of the stopper function part, a part of the residual water may be discharged from the water outlet, but there is a high possibility that the residual water will stay, and all the residual water can be completely discharged from the water outlet. There is a problem that it is difficult.

  Further, Patent Document 2 describes an intake valve that is connected in the middle of a water pipe in a cold region and introduces air into the pipe to cause drainage. This intake valve is provided with a water pressure from the water pipe and a piston that opens and closes the intake port upstream of the intake valve by means of a spring. When the pressure is exceeded, the piston closes the intake port, and during draining operation, the pressure of water falls below the restoring force of the spring, so that the piston opens the intake port and outside air is drawn from the intake valve. Yes.

Furthermore, Patent Document 3 describes an automatic drain valve that is provided in a water supply facility in a cold region and can automatically drain water in a pipe simply by operating a drain plug. The water supply equipment provided with the automatic water drain valve is connected to the water supply main pipe, the water drain plug connected to the primary pipe, and the water drain plug connected to the water heater. A secondary pipe for cold water, a header for cold water connected to the secondary pipe for cold water, a secondary pipe for hot water that connects the water heater and the header for hot water, a header for cold water, and a hot water mixing faucet device It has a water supply pipe to be connected, a hot water supply pipe to connect the hot water header and the hot water mixing faucet device, and between the primary pipe for cold water upstream of the hot water mixing faucet device and the water heater. A first automatic drain valve is provided, and a second automatic drain valve is provided between the cold water header and the hot water header upstream of the hot and cold water mixing device.
However, for example, in the main body of the hot and cold water mixing faucet device with a temperature adjustment function, each of hot water and water supplied from the upstream side is mixed to adjust the temperature of hot water to be discharged, The function part etc. which switch spout water are provided, and each flow path of the hot water and water which flows into such a function part, and the flow path through which the hot water mixed in the function part flows into the spout part are formed in a complicated manner However, since the main body of the hot and cold water mixing device is not provided with an automatic water drain valve, hot water and water are not introduced into the flow channel in the main body of the hot and cold water mixing device. Remains, and it is difficult to completely discharge the remaining water in the main body of the hot and cold water mixing device.
In addition, when draining water in a cold region, there is a problem that the operation becomes complicated when it is performed for a hot and cold water mixing faucet device with a temperature control function.

Next, with reference to FIG. 19, the drainage in the conventional hot and cold water mixing faucet apparatus with a temperature control function will be described.
FIG. 19 is a schematic view showing a conventional hot and cold water mixing faucet device with a temperature control function.
As shown in FIG. 19, a conventional hot and cold water mixing apparatus 500 includes a faucet body 502, a hot water supply leg 504 for supplying hot water from a water heater (not shown) to the faucet body 502, and a faucet. A water supply leg 506 for supplying tap water to the main body 502 is provided. The faucet body 502 is provided with a hot water temperature adjustment dial 508 attached to the left end portion thereof, and a spouting water switching handle 510 attached to the right end portion.
Further, on the downstream side of the faucet body 502, a currant 512 and a shower head 514 for discharging temperature-adjusted hot water are provided.
Further, the faucet body 502 incorporates a switching unit 516 capable of switching between water discharge and water stop from the currant 512 and water discharge and water stop from the shower head 514. The hot water supply leg 504 and the water supply leg The hot water and water supplied to the faucet body 502 from each of the water faucets 506 pass through the hot water passage 502a and the water passage 502b in the faucet body 502, and are set by the hot water temperature adjustment dial 508 in the temperature adjustment unit 518. The water is mixed so that the temperature is adjusted, and the water discharge switch 510 is operated to discharge water from the currant 512, discharge water from the shower head 514, or stop water discharge from both. Can be switched to. Therefore, in the hot and cold water mixing device 500, the temperature adjusting unit 518 is filled with water even in the water stop state, and the supply pressure of hot water and water is applied in the temperature adjusting unit 518.

Furthermore, backflow prevention valves 520a and 520b are respectively provided in the hot water passage 502a and the water passage 502b on the upstream side of the temperature adjustment unit 518. That is, since the hot water passage 502a and the water passage 502b communicate with each other through the temperature adjustment unit 518 even in the water-stopped state, when there is a difference between the hot water supply pressure and the water supply pressure, Therefore, the backflow prevention valves 520a and 520b are provided to prevent the backflow of hot water from the temperature adjusting unit 518 to the hot water passage 502a and the water passage 502b.
Further, in the cold district, when draining such a conventional hot and cold water mixing faucet device 500, the hot water supply leg 504 and the water supply leg 506 provided upstream of the backflow prevention valves 520a and 520b are provided. The drainage cocks 522a and 522b are operated to the drainage side to be opened, the outside air is taken in from the drainage cocks 522a and 522b, and the hot water staying on the upstream side of the backflow prevention valves 520a and 520b. And each of water is discharged.

Japanese Utility Model Publication No. 4-108656 JP 2004-52288 A JP 2003-96835 A

However, in the conventional hot and cold water mixing faucet device 500, the hot water staying in the temperature adjustment unit 518 and the switching unit 516 from the downstream side of the backflow prevention valves 520a and 520b is prevented from flowing into the backflow prevention valves 520a and 520b. Therefore, the drainage cock 524 is provided at any location of the hot water passage 502a or the water passage 502b on the downstream side of the backflow prevention valves 520a and 520b.
Therefore, when draining water from the conventional hot and cold water mixing device 500, the drain cocks 522a and 522b of the hot water supply leg 504 and the water supply leg 506 are operated to the drain side and opened simultaneously. , By operating the spout water switching handle 510 so that the on-off valve 516a of the switching unit 516 is opened and rotating the hot water temperature adjusting dial 508 in communication with the currant 512 or the shower head 514, There is a problem that the water draining operation becomes complicated because an additional work of discharging hot water remaining in the downstream side of the backflow prevention valves 520a and 520b or in the temperature control unit 518 is required.
In addition, if any of the drainage cocks 522a, 522b, and 524 or the stop water switching handle 510 is forgotten, the water remaining in the faucet body freezes and the temperature adjustment unit There is also a problem that 518 and the like may be damaged.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and provides a hot and cold water mixing faucet device that can easily drain water without requiring a complicated operation. It is aimed.

In order to solve the above-described problem, the present invention is a hot-water mixing faucet device that stops hot water mixed with hot water supplied from a hot-water supply source and water supplied from the water-supply source. A faucet body provided with a hot and cold water mixing unit in which hot water supplied and water supplied from a water supply source are mixed, and provided in the faucet body, opened and closed by water pressure on the upstream side of the faucet body, An intake drain valve that is opened by a draining operation in which water supply from the water supply source to the faucet body is stopped, and performs intake and drainage with respect to the faucet body. The valve is opened by the water draining operation, and intake air is automatically supplied to the respective hot water and water flow paths upstream of the hot water mixing section, and the hot water flow paths downstream of the hot water mixing section. single intake air or waste water is arranged to be automatic for It is characterized by a water valve.
In the present invention configured as above, water supply from the water supply source to the faucet body is stopped by the draining operation, and the water pressure on the upstream side of the faucet body is lowered, so that the intake drain valve is opened. In addition, it is possible to automatically perform intake air to the hot water and water flow paths upstream of the hot water mixing section of the faucet body, and to intake or discharge the hot water flow path downstream of the hot water mixing section. Since drainage can be performed automatically, it is possible to easily drain water from the faucet body without touching the hot water / mixing faucet device itself or requiring a complicated operation. In addition, by opening the intake / drain valve with a single drain operation, intake and drainage can be performed simultaneously on the faucet body, thus draining the faucet body efficiently and reliably. be able to.
Furthermore, since the intake / drain valve is a single intake / drain valve, when water supply from the water supply source to the faucet body is stopped by the drain operation, the single intake / drain valve automatically opens and the water is discharged. Intake and drainage can be automatically performed on the plug body. Thereby, it is possible to easily drain water with a simple single intake / drain valve structure without requiring a complicated operation.

In the present invention, preferably, it further includes a pressure chamber into which water supplied from the water supply source to the faucet body flows, and the intake / drain valve is provided in the pressure chamber so that the water pressure in the pressure chamber is In the vicinity of the valve body of the valve body and the faucet body, there is provided a communication portion for communicating the pressure chamber and the outside of the faucet body through the valve body. When the water supply from the water supply source to the faucet body is stopped by the draining operation, the communication portion is lowered from the communication portion when the water pressure in the pressure chamber decreases and the valve body opens. Intake is performed in the pressure chamber, and water in the pressure chamber is discharged to the outside of the faucet body through the communication portion.
In the present invention configured as above, it has a pressure chamber into which water supplied from the water supply source to the faucet body flows, and an intake drain valve is provided in the pressure chamber so that the water pressure in the pressure chamber is reduced. In the vicinity of the valve body of the valve body and the faucet body, there is provided a communication portion for communicating the pressure chamber and the outside of the faucet body through the valve body. When the water supply from the water supply source to the faucet body is stopped and the water pressure in the pressure chamber decreases and the valve body opens, intake air from the communication section into the pressure chamber allows the water in the pressure chamber to communicate. It can be discharged to the outside of the faucet body through the section. Therefore, it is possible to prevent water from remaining in the pressure chamber and freezing.

In the present invention, preferably, the valve body is a diaphragm type valve body that opens and closes in the pressure chamber by water pressure.
In the present invention configured as described above, the valve body of the intake / drain valve is a diaphragm type valve body that opens and closes by the water pressure in the pressure chamber. The opening / closing performance of the drain valve can be improved.

In the present invention, preferably, the communication portion includes a communication hole that is formed in the valve body and allows water supplied from the water supply source to the faucet body to pass through the pressure chamber. It opens and closes by the pressure of water that has passed through the communication hole and has flowed into the pressure chamber.
In the present invention configured as described above, the water supplied to the faucet body from the water supply source can flow into the pressure chamber through the communication hole of the communication portion formed in the valve body. The valve body can be easily moved in the closing direction by the pressure of the water flowing into the chamber. On the other hand, when water supply from the water supply source to the faucet body is stopped by the water draining operation, the water pressure on the upstream side of the faucet body decreases and flows into the pressure chamber through the communication hole of the valve body. Since the pressure of water falls, it can move easily in the direction in which the valve element opens. Therefore, water can be easily drained without a complicated operation with a simple structure in which a communication hole for supplying water into the pressure chamber is provided in the valve body.

In this invention, Preferably, it has further the manual operation part which is provided in the said intake / drain valve and can operate this intake / drain valve manually.
In the present invention configured as described above, since it has a manual operation portion that can manually operate the intake / drain valve, water supply from the water supply source to the faucet body is stopped and the intake / drain valve is opened by draining operation. Even if the intake / drain valve is in a closed state when you try to valve it, you can manually open the intake / drain valve by manually operating the manual operation part. Can drain water reliably.

In the present invention, preferably, further, a hot water inflow portion and a water inflow portion into which hot water and water flow from the upstream side of the hot water mixing portion, hot water inflow from each of the hot water inflow portion and the water inflow portion, and A hot and cold water outflow section for flowing out the temperature-controlled hot water by adjusting the amount of water and mixing, the temperature control function section comprising the hot water inflow section and the water inflow section Is inclined in the faucet body so as to incline downward toward the hot water outflow portion.
In the present invention configured as above, the hot water inflow portion and the water inflow portion into which hot water and water respectively flow from the upstream side of the hot water mixing portion, and the hot water inflow from each of these hot water inflow portion and water inflow portion. And a hot and cold water outflow section for flowing out the temperature-controlled hot water by adjusting and mixing the amount of water, and this temperature control function section comprises the hot water inflow section and the water inflow Since the water faucet body is inclined so as to incline downward from the hot water outlet to the hot water outflow part, the temperature when the water supply from the water supply source to the faucet body is stopped by the draining operation. Residual water in the adjustment function section can be easily discharged. Therefore, it is possible to prevent water from remaining in the temperature control function unit and freeze it, and to prevent damage to the temperature control function unit due to freezing.

In the present invention, preferably, a shower hose part provided at a tip part with a shower head for discharging hot water mixed in the hot water / water mixing part, and a shower hose connecting the shower hose part and the faucet body. And the shower hose connection portion is located above the lowest position of the drainage portion that is opened and closed by the intake drainage valve.
In the present invention configured as described above, a shower hose portion provided at the tip with a shower head for discharging hot water mixed in the hot water mixing portion, and a shower hose connecting the shower hose portion and the faucet body Since this shower hose connection part is located above the lowest position of the drainage part that is opened and closed by the intake drainage valve, the water supply from the water supply source to the faucet body is performed by draining operation. When water is stopped, the remaining water that has flowed into the shower hose connection from the shower hose can be reliably drained from the drain that is opened by the intake drain valve, leaving water in the shower hose connection and freezing. Can be prevented.

Next, the present invention is a hot and cold water mixing faucet device for discharging hot water mixed with hot water supplied from a hot water supply source and water supplied from a water supply source, and the hot water supplied from the hot water supply source passes therethrough. A hot water passage, a water passage through which water supplied from a water supply source passes, a hot water backflow prevention valve provided in the hot water passage to prevent backflow of hot water, and a water passage provided in the water passage. A water backflow prevention valve for preventing backflow, and a hot water backflow prevention valve and a water backflow prevention valve provided on the downstream side of the water supply amount and supplied from the water passage. A water faucet body provided with a temperature adjustment function part that adjusts the temperature of hot water by adjusting and mixing the amount of water, and provided downstream of the water faucet body, It is provided on the downstream side of the faucet body, and the temperature A shower water discharge unit that discharges hot water mixed in the node function unit, and a hot water that is provided on the downstream side of the temperature adjustment function unit of the faucet body and supplies hot water to each of the curan water discharge unit and the shower water discharge unit Provided with an opening / closing valve for opening and closing the mixing path, provided in the faucet body, and a switching unit capable of switching water discharge and water stop from the curan water discharge unit and water discharge and water stop from the shower water discharge unit, Provided in the faucet body, which is provided in the faucet body, and drains the remaining water in the faucet body by the draining operation. Inlet air that opens and closes by the water pressure on the upstream side of the faucet body and is opened by the draining operation, enables intake by the intake portion, and allows drainage by the drain portion Excretion A first intake portion provided in a first flow path, which is the water flow path upstream of the water backflow prevention valve, and the hot water backflow prevention valve. A second intake section provided in a second flow path that is the hot water flow path upstream of the third, and a third from the water backflow prevention valve and the hot water backflow prevention valve to the on-off valve. A third air intake section provided in the flow path, a fourth air intake section provided in the fourth flow path from the on-off valve to the currant water discharge section, and from the open / close valve to the shower water discharge section. A fifth air intake section provided in the fifth flow path, and the drainage section is provided in the first drainage section provided in the third flow path and the fifth flow path. And a second drainage section.
In the present invention configured as described above, when a drain operation is performed to stop water supply from the water supply source to the faucet body, the water pressure for opening and closing the intake drain valve decreases, and the intake drain valve is closed. The air intake and drain are automatically opened. Then, when the first intake portion sucks the first flow path, which is a water flow path upstream of the water backflow prevention valve, the water in the first flow path is upstream of the water flow path. Drained. At the same time, the hot water in the second flow path is sucked into the second flow path, which is the hot water flow path upstream from the hot water backflow prevention valve, so that the hot water in the second flow path is It is drained to the upstream side. At the same time, the third intake section sucks air into the third flow path from each of the water backflow prevention valve and the hot water backflow prevention valve to the on-off valve. Hot water and water are drained from the first drainage portion to the outside of the faucet body. At the same time, the fourth intake passage sucks into the fourth passage from the on-off valve to the currant spouting portion, so that hot water in the fourth passage is transferred from the currant spouting portion to the outside of the faucet body. To be drained. Furthermore, at the same time, when the fifth intake passage sucks into the fifth flow path from the on-off valve to the shower water discharger, hot water in the fifth flow path is transferred from the second drainage part to the faucet body. Drained outside. That is, the water draining operation stops the water supply from the water supply source to the faucet body, and the water pressure on the upstream side of the faucet body decreases, so that the intake / drain valve is opened and the intake and exhaust valves are opened to the faucet body. Drainage can be performed automatically. Therefore, water can be easily drained from the faucet body without touching the hot water / water mixing faucet device itself or requiring a complicated operation. In addition, since the intake and drain valve is opened by a single drain operation, intake and drainage are simultaneously performed on the faucet body, so that the drain in the faucet body can be drained efficiently and reliably. it can.

In the present invention, preferably, the third flow path includes a sixth flow path from the water backflow prevention valve to the temperature adjustment function section, and a flow path from the hot water backflow prevention valve to the temperature adjustment function section. A seventh flow path and an eighth flow path from the temperature adjustment function section to the on-off valve, and the third intake section is a sixth intake air provided in the sixth flow path. And a seventh intake section provided in the seventh flow path, wherein the first drainage section includes the third drainage section provided in the sixth flow path, and the seventh drainage section. And a fourth drainage portion provided in the eighth flow path and a fifth drainage portion provided in the eighth flow path.
In the present invention configured as described above, when a drain operation is performed to stop water supply from the water supply source to the faucet body, the water pressure for opening and closing the intake drain valve decreases, and the intake drain valve is closed. When the intake portion and the drainage portion are automatically opened from the sixth intake portion, the sixth intake portion is further sucked into the sixth flow path from the water backflow prevention valve to the temperature control function portion, thereby Water in the channel is drained from the third drainage section. At the same time, when the seventh intake passage sucks into the seventh flow path from the hot water backflow prevention valve to the temperature adjustment function section, the hot water in the seventh flow path is discharged from the fourth drainage section. Drained. At the same time, when the eighth intake section sucks air into the eighth flow path from the temperature adjustment function section to the on-off valve, the hot water and water in the eighth flow path are discharged into the fifth drainage. Drained from the part. Therefore, it is possible to drain water from the faucet body more efficiently and reliably.

Next, the present invention is a hot and cold water mixing faucet device for discharging hot water mixed with hot water supplied from a hot water supply source and water supplied from a water supply source, and the hot water supplied from the hot water supply source passes therethrough. A hot water supply section where water supplied from a water supply source passes, a hot water supplied from the hot water supply path, and a hot water mixing section in which the water supplied from the water flow path is mixed, and the hot water A faucet body provided with a hot and cold water mixing path through which hot water mixed in the mixing section passes, a water discharge section provided on the downstream side of the faucet body, and discharging the hot water passing through the hot water and water mixing path, and It is provided in the faucet body, and can open and close the hot water passage, the water passage and the hot water mixing passage to switch water discharge and water stop from the water discharge portion, Adjust the amount of hot water and water flowing into the hot water mixing section from each. An on-off valve that is provided in the faucet body, and communicates the water passage upstream of the hot water mixing section and the hot water mixing path with the hot water mixing path downstream of the hot water mixing section. A communication portion and a pressure chamber formed in the communication portion, and opens and closes the communication portion by water pressure flowing into the pressure chamber from the upstream side of the faucet body, and from the water supply source to the faucet body The communication part is opened by a draining operation to stop water supply, and has an intake / drain valve that performs intake and drainage into the faucet body, and the communication part is connected to the water passage. A first communication part to the intake / drain valve; a second communication part from the hot water passage to the intake / drain valve; a third communication part for communicating the hot water mixing path and the intake / drain valve; , And in the vicinity of the intake / drain valve in the faucet body The drainage part for draining hot water drained from the third communication part to the outside of the faucet body is provided so as to be opened and closed by the intake drain valve, and the third communication part and the drainage part are: When the pressure of water flowing into the pressure chamber of the communication portion from the water passage decreases due to the draining operation and the intake / drain valve opens, the third communication portion passes from the water discharge portion through the hot water mixing passage. The hot water in the hot and cold mixing path is drained from the drainage part to the outside of the faucet body through the third communication part.
In the present invention configured as described above, the pressure formed in the communication section that connects the water passage on the upstream side of the hot water mixing section and the hot water mixing path on the downstream side of the hot water mixing section with each of the hot water passage and the hot water mixing section. An intake / drain valve provided in the room opens and closes the communication part by the water pressure flowing into the pressure chamber from the upstream side of the faucet body, and the drainage operation is performed to stop the water supply from the water supply source to the faucet body. When the pressure of the water flowing into the pressure chamber of the communication portion decreases, the intake / drain valve opens and the communication portion is opened. As a result, the water is sucked into the hot water mixing path from the water discharge section, and is sucked into the drainage section through the third communication section from the hot water mixing path, and the hot water in the hot water mixing path passes through the third communication section from the drainage section to the faucet body. Since the water is drained to the outside, the intake and drainage can be automatically performed with respect to the faucet body. Therefore, water can be easily drained from the faucet body without touching the hot water / water mixing faucet device itself or requiring a complicated operation. In addition, since the intake and drain valve is opened by a single drain operation, intake and drainage are simultaneously performed on the faucet body, so that the drain in the faucet body can be efficiently drained.

Next, the present invention is a hot and cold water mixing faucet device for discharging hot water mixed with hot water supplied from a hot water supply source and water supplied from a water supply source, and the hot water supplied from the hot water supply source passes therethrough. A hot water supply section where water supplied from a water supply source passes, a hot water supplied from the hot water supply path, and a hot water mixing section in which the water supplied from the water flow path is mixed, and the hot water A faucet body provided with a hot and cold water mixing path through which hot water mixed in the mixing section passes, a water discharge section provided on the downstream side of the faucet body, and discharging the hot water passing through the hot water and water mixing path, and It is provided in the faucet body, and can open and close the hot water passage, the water passage and the hot water mixing passage to switch water discharge and water stop from the water discharge portion, Adjust the amount of hot water and water flowing into the hot water mixing section from each. An on-off valve that is provided in the faucet body, and communicates the water passage upstream of the hot water mixing section and the hot water mixing path with the hot water mixing path downstream of the hot water mixing section. A communication portion and a pressure chamber formed in the communication portion, and opens and closes the communication portion by water pressure flowing into the pressure chamber from the upstream side of the faucet body, and from the water supply source to the faucet body The communication part is opened by a draining operation to stop water supply, and has an intake / drain valve that performs intake and drainage into the faucet body, and the communication part is connected to the water passage. A first communication part to the intake / drain valve; a second communication part from the hot water passage to the intake / drain valve; a third communication part for communicating the hot water mixing path and the intake / drain valve; , And the above drainage operation from the water channel to the above When the pressure of the water flowing into the pressure chamber of the passage portion decreases and the intake / drain valve opens, the water is sucked into the hot water mixing passage from the water discharge portion, and the third communication portion is passed through the hot water mixing passage through the third communication portion. Air is sucked into each of the first communication part and the second communication part, and hot water in the hot and cold water mixing path passes through the third communication part from each of the first communication part and the second communication part. It is characterized by being drained to each of the water passage and the hot water passage.
In the present invention configured as described above, the pressure formed in the communication section that connects the water passage on the upstream side of the hot water mixing section and the hot water mixing path on the downstream side of the hot water mixing section with each of the hot water passage and the hot water mixing section. An intake / drain valve provided in the room opens and closes the communication part by the water pressure flowing into the pressure chamber from the upstream side of the faucet body, and the drainage operation is performed to stop the water supply from the water supply source to the faucet body. When the pressure of the water flowing into the pressure chamber of the communication portion decreases, the intake / drain valve opens and the communication portion is opened. As a result, air is sucked into the hot water / mixing path from the water discharge section, and is sucked into the first communication section and the second communication section through the third communication section from the hot / water mixing path, and the hot water in the hot water / mixing path is third. Since the water is discharged from the first communication portion and the second communication portion to the water passage and the hot water passage through the communication portion, the intake and drainage can be automatically performed in the faucet body. it can. Therefore, water can be easily drained from the faucet body without touching the hot water / water mixing faucet device itself or requiring a complicated operation. In addition, since the intake and drain valve is opened by a single drain operation, intake and drainage are simultaneously performed on the faucet body, so that the drain in the faucet body can be drained efficiently and reliably. it can.

In the present invention, it is preferable that hot water discharged from the third communicating portion is further provided near the intake / drain valve in the faucet body so as to be opened and closed by the intake / drain valve. It has a drainage part that drains to the outside.
In the present invention configured as described above, when a water draining operation is performed and the intake water drain valve is opened, a drainage portion provided near the intake water drain valve in the faucet body so as to be opened and closed by the intake water drain valve. Since the hot water drained from the third communicating portion can be drained to the outside of the faucet body, the drainage in the faucet body can be more efficiently and reliably performed.

  According to the hot and cold water mixing device of the present invention, water can be easily drained without requiring a complicated operation.

It is the schematic which shows the hot and cold water mixing faucet device by a 1st embodiment of the present invention. It is the perspective view which looked at the hot / cold water mixing faucet device by 1st Embodiment of this invention from diagonally upward and the front. FIG. 3 is a perspective sectional view taken along line III-III in FIG. 2. FIG. 4 is a perspective sectional view taken along line IV-IV in FIG. 2. It is sectional drawing along the VV line of FIG. FIG. 6 is a perspective sectional view taken along line VI-VI in FIG. 2. It is a disassembled perspective view of the faucet body and the intake / drain valve unit of the hot and cold water mixing faucet device according to the first embodiment of the present invention. It is sectional drawing along the VIII-VIII line of FIG. 7, Comprising: It is a partial expanded sectional view which expands and shows partially the intake-drain valve unit of the valve closing state of the hot-water mixing faucet device by 1st Embodiment of this invention. is there. It is sectional drawing along the VIII-VIII line of FIG. 7, Comprising: It is a partial expanded sectional view which expands partially and shows the intake water drain valve unit of the valve opening state of the hot-water mixed tap apparatus by 1st Embodiment of this invention. is there. It is the perspective view which looked at the hot / cold water mixing faucet device by 2nd Embodiment of this invention from diagonally back. It is sectional drawing along the XI-XI line of FIG. 10, It is front sectional drawing containing the front cross section of the hot water passage and the water passage in the hot-water mixed tap apparatus by 2nd Embodiment of this invention. It is sectional drawing along the XII-XII line | wire of FIG. 11, It is side surface sectional drawing containing the right side surface cross section of the water flow path in the hot-water mixed tap apparatus by 2nd Embodiment of this invention. It is sectional drawing which followed the XIII-XIII line | wire of FIG. 11, and is a center side sectional view in the hot and cold water mixing faucet device by 2nd Embodiment of this invention. It is sectional drawing along the XIV-XIV line | wire of FIG. 11, It is a plane sectional view containing the plane cross section of the valve unit in the hot and cold water mixing faucet device by 2nd Embodiment of this invention. It is a disassembled perspective view of the intake / drain valve unit of the hot and cold water mixing faucet device by 2nd Embodiment of this invention. FIG. 13 is a partially enlarged cross-sectional view showing a partially enlarged intake / drain valve unit of the hot and cold water mixing device according to the second embodiment of the present invention shown in FIG. 12. It is a partial expanded sectional view which expands and shows the intake / drain valve unit of the hot and cold water mixing faucet device by 2nd Embodiment of this invention shown in FIG. It is side surface sectional drawing along the right side surface cross section of the water flow path in the hot / cold water mixing faucet apparatus by 3rd Embodiment of this invention. It is the schematic which shows the conventional hot and cold water mixing faucet device with a temperature control function.

Next, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
First, with reference to FIGS. 1-9, the hot / cold water faucet device by 1st Embodiment of this invention is demonstrated.
FIG. 1 is a schematic view showing a hot and cold water mixing device according to the first embodiment of the present invention, and FIG. 2 is a perspective view showing the hot water and water mixing device according to the first embodiment of the present invention. 3 is a perspective sectional view taken along line III-III in FIG. 2, and FIG. 4 is a perspective sectional view taken along line IV-IV in FIG. 5 is a cross-sectional view taken along line VV in FIG. 2, and FIG. 6 is a perspective cross-sectional view taken along line VI-VI in FIG.

First, as shown in FIGS. 1 and 2, the hot and cold water mixing apparatus 1 according to the first embodiment of the present invention includes a faucet body 2, and a hot water supply source is provided on the back side of the faucet body 2. A hot water supply leg 4 for supplying hot water from a hot water heater (not shown) and a water supply leg 6 for supplying tap water from a water supply source (not shown) such as water supply to the faucet body 2 are provided. It has been.
The hot water supply leg 4 connects a hot water supply pipe (not shown) provided on the wall surface and the faucet body 2 to supply hot water to the faucet body 2.
Further, the water supply leg 6 connects a water pipe (not shown) provided on the wall surface and the faucet body 2 to supply water to the faucet body 2. In addition, a drain plug (not shown) that is operated when draining the hot and cold water mixing faucet device 1 in a cold district or the like is provided in the flow path on the upstream side of the water supply leg 6. Yes.

Next, as shown in FIG. 1, a water passage 8 through which hot water supplied from the hot water supply leg 4 passes and a water passage through which water supplied from the water supply leg 6 passes are provided in the faucet body 2. 10 are formed.
Moreover, as shown in FIGS. 1-4 and 6, each of the hot water passage 8 and the water passage 10 is provided with a hot water backflow prevention valve 12 and a water backflow prevention valve 14, respectively. The water backflow prevention valve 12 prevents the hot water downstream of the hot water backflow prevention valve 12 from flowing back to the hot water supply leg 4 side, and the water backflow prevention valve 14 causes the water downstream of the water backflow prevention valve 14 to Backflow to the water supply leg 6 side can be prevented.

Next, as shown in FIGS. 1 to 3 and 5, on the downstream side of the water passage 8 and the water passage 10 in the faucet body 2, the amount of hot water supplied from the water passage 8 and the water passage There is provided a thermo unit 16 that is a hot and cold mixing unit that adjusts and mixes the amount of water supplied from 10 and a temperature adjustment function unit that adjusts the temperature of the mixed hot and cold water.
As shown in FIGS. 1 and 2, a currant 18 and a shower head 20 for discharging hot water whose temperature is adjusted by the thermo unit 16 are provided on the downstream side of the faucet body 2, respectively.

Further, as shown in FIGS. 1 to 3 and 5, on the downstream side of the thermo unit 16 in the faucet body 2, water discharge and water stop from the currant 18 and water discharge and water stop from the shower head 20 are provided. There is provided a switching unit 22 which is a switching unit capable of switching between the two. The switching unit 22 includes a switching valve 26 that is an on-off valve that opens and closes a hot and cold mixing path 24 through which hot water mixed in the thermo unit 16 and temperature-controlled passes. The water discharge from the shower head and the water stop, and the water discharge from the shower head 20 and the water stop can be switched.
As shown in FIGS. 1 to 5, an attached hot water temperature adjustment dial 28 is provided at the left end portion of the thermo unit 16 when viewed from the front side of the faucet body 2. At the right end portion of the switching unit 22 as viewed from the front side, a spouting water switching handle 30 is provided.

The hot water temperature adjusting dial 28 operates the thermo unit 16 built in the faucet body 2 by turning the dial 28 and can change the temperature of the hot water adjusted by the thermo unit 16. .
The spouting water switching handle 30 is rotated to switch the switching valve 26 built in the switching unit 22 so that the water stopping state, the water discharging state from the currant 18, and the water discharging state from the shower head 20 are switched. It is like that.
Further, when the stop water switching handle 30 is rotated to the side of the currant, hot water mixed at an appropriate temperature by the thermo unit 16 is discharged from the currant 18, and when the stop water switching handle 30 is rotated to the side of the shower, the appropriate temperature is reached. The hot and cold water mixed in is discharged from the shower head 20.

  Further, as shown in FIGS. 1 to 3, an intake / drain valve unit 34 having an intake / drain valve body 32 that opens and closes by the water pressure upstream of the water supply leg 6 on the back side of the faucet body 2 (for details) (To be described later). When a drain plug (not shown) on the upstream side of the water supply leg 6 is operated to the drain side, water supply from the water supply source (not shown) to the faucet body 2 is stopped, and the water supply leg 6 A negative pressure is generated when the water pressure in the upstream flow path is reduced, and the intake / drain valve body 32 of the intake / drain valve unit 34 is opened. As a result, outside air is automatically sucked into a plurality of flow paths in the faucet body from an intake portion I (details will be described later) opened by the intake / drain valve unit 34, and the faucet body 2 Hot water and / or water in the plurality of flow paths are automatically drained to the outside of the faucet body 2 from a drainage portion O (details will be described later) opened by the intake drainage valve unit 34. Yes.

Next, referring to FIG. 1 to FIG. 9, the intake / drain valve unit in the hot and cold water mixing faucet device of the present embodiment, the intake portion sucked by the intake / drain valve unit, and the drainage discharged by the intake / drain valve unit Details of the unit will be described.
FIG. 7 is an exploded perspective view of the faucet body and intake / drain valve unit of the hot and cold water mixing faucet device according to the first embodiment of the present invention, and FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. FIG. 9 is a partially enlarged cross-sectional view showing a partially enlarged intake / drain valve unit of the hot and cold water mixing apparatus according to the first embodiment of the present invention. FIG. 9 is a sectional view taken along line VIII-VIII in FIG. FIG. 2 is a partially enlarged cross-sectional view showing a partially enlarged view of the intake / drain valve unit in the open state of the hot and cold water mixing device according to the first embodiment of the present invention.

First, as shown in FIG. 7, the intake / drain valve main body 32 of the intake / drain valve unit 34 is formed in the intake / drain valve unit mounting portion A provided on the back side of the faucet body 2, and is always in the intake portion I. A single diaphragm that opens and closes simultaneously with respect to five communication ports (intake ports) 38, 40, 42, 44, 46 and four communication ports (drain ports) 48, 50, 52, 54 other than the open communication port 36 A valve body 56 of the type is provided.
Further, as shown in FIG. 7, the intake / drain valve unit 34 includes communication ports (intake ports) 36, 38, 40, 42, 44, 46 and a drainage portion O of the intake portion I on the back surface of the faucet body 2. The coil spring 60 is attached to a spring mounting hole 58 at the center of the ports (drain ports) 48, 50, 52, 54. The coil spring 60 attaches the valve body 56 from the front side to the rear side. It has come to force.
Furthermore, as shown in FIGS. 7 to 9, the intake / drain valve unit 34 includes a holding member 62 that is attached to the back side of the valve body 56 and holds the valve body 56. The holding member 62 is fixed to the back surface of the faucet main body 2 opposite to the holding member 62 by a bolt 64, and a valve chamber 66 (see FIG. 9) in which the valve body 56 is accommodated is formed on the front side of the holding member 62. ing. The valve chamber 66 is formed on the rear side of the valve body 56 and applies a water pressure to the valve body 56 from the back side (back pressure chamber) 66a, and is formed on the front side of the valve body 56 and In the state where the body 56 is opened, each communication port (intake port) 36, 38, 40, 42, 44, 46 of the intake portion I and each communication port (drain port) 48, 50, 52, 54, a communication chamber 66 b communicating with 54.

Next, as shown in FIGS. 1, 3, 4, and 6 to 9, the water faucet body 2 includes a water passage 10 a upstream of the water backflow prevention valve 14 and the faucet body 2. A communication path 68 is provided for communicating with the communication port 36 on the back surface.
Further, as shown in FIGS. 7 to 9, the valve body 56 has a first communication hole 70 that allows the communication passage 68 of the faucet body 2 to communicate with the pressure chamber 66 a and the communication chamber 66 b in the front-rear direction. A part of the water supplied from the water supply leg 6 to the water flow path 10a upstream of the water backflow prevention valve 14 of the faucet body 2 passes through the communication path 68 and is connected to the communication chamber 66b. And it flows into the pressure chamber (back pressure chamber) 66a through the first communication hole 70 of the valve body 56. Then, the water pressure in the pressure chamber (back pressure chamber) 66a presses the valve body 56 from the back side, and when the pressing force exceeds the urging force of the coil spring 60, the valve body 56 is closed, and the faucet body 2, the communication ports (intake ports) 38, 40, 42, 44, 46 of the intake portion I and the communication ports (drain ports) 48, 50, 52, 54 of the drainage portion O are closed simultaneously. It has become.

Next, as shown in FIG. 7, the valve body 56 is formed with a second communication hole 72 penetrating in the front-rear direction and having a hole diameter smaller than that of the first communication hole 70. The communication hole 72 is closed when the valve body 56 is closed.
Further, as shown in FIGS. 4 and 7 to 9, in the vicinity of the upper side of the valve body 56 in the intake / drain valve unit mounting portion A of the faucet body 2, there is communication with a vent hole 62 a penetrating the holding member 62 in the front-rear direction. A communication passage (intake passage) 74 is formed, and the communication chamber 66b and the outside of the faucet body 2 communicate with each other through the communication passage (intake passage) 74 and the vent hole 62a of the holding member 62. It has become.
Further, in the vicinity of the lower side of the valve body 56, three communication passages (drainage passages) 76, 78, and 80 that connect the communication chamber 66 b and the outside of the faucet body 2 are formed.

Further, when a drain plug (not shown) on the upstream side of the water supply leg 6 is operated to the drain side, water supply from a water supply source (not shown) is stopped, and the upstream side of the water supply leg 6 is stopped. When the water pressure in the flow path decreases and becomes equal to or lower than the atmospheric pressure, a negative pressure is generated. By this negative pressure, the water in the water flow path 10a upstream of the water backflow prevention valve 14 of the faucet body 2 is discharged. The water supply leg 6 is discharged to the upstream side of the water supply leg 6. Accordingly, since the pressure in the flow path upstream of the faucet body 2 is equal to or lower than atmospheric pressure, water is not supplied into the pressure chamber 66a through the communication path 68, and the pressure in the pressure chamber 66a is reduced. As a result, there is no force to push the valve body 56 from the back side, and the urging force of the coil spring 60 moves the valve body 56 in the valve opening state (left side direction in FIG. 8) from the valve closing state shown in FIG. 9, the valve is opened, and the communication ports (intake ports) 36, 38, 40, 42, 44, 46 of the intake portion I on the back surface of the faucet body 2 and the communication ports (drain ports) of the drainage portion O are opened. ) 48, 50, 52, 54 are opened simultaneously.
At this time, since the valve body 56 is completely opened by the urging force of the coil spring 60, the pressure chamber 66a is minimized, and the water in the pressure chamber 66a can be discharged more reliably.

Further, as shown in FIG. 7, the intake / drain valve unit 34 is fixedly provided at the central portion of the valve body 56 of the intake / drain valve main body 32, and is used for manual operation that protrudes to the back side through the holding member 62. A knob member 81 is provided, and the knob member 81 for manual operation is slidable in the front-rear direction together with the valve body 56 with respect to the holding member 62.
In addition, a drain plug (not shown) on the upstream side of the water supply leg 6 is operated to the drain side, water supply to the faucet body 2 is stopped, and the valve body 56 of the intake / drain valve body 32 is opened. Even if the valve body 56 of the intake / drain valve main body 32 is fixed and remains in the closed state, it is necessary to manually pull the manual operation knob member 81 to the back side. By operating, the valve body 56 of the intake / drain valve body 32 can be forcibly opened, so that water can be drained reliably.

  In the present embodiment, a single diaphragm type valve body 56 is adopted as the valve body 56 of the intake / drain valve body 32 of the intake / drain valve unit 34, and this single diaphragm type valve body 56 is used as an intake air. A mode in which the communication ports (intake ports) 36, 38, 40, 42, 44, 46 of the part I and the communication ports (drain ports) 48, 50, 52, 54 of the drainage unit O are simultaneously opened and closed will be described. However, the present invention is not limited to such a form, and can be applied to other forms of valve bodies. For example, in addition to the diaphragm-type valve body, a piston-type valve body that slides in the front-rear direction may be adopted as the valve body, or the communication port (intake port) 36 of the intake portion I is constituted by a plurality of valve bodies. , 38, 40, 42, 44, 46 and the communication ports (drain ports) 48, 50, 52, 54 of the drainage portion O may be opened and closed simultaneously.

Next, with reference to FIG. 1 to FIG. 9, the details of the intake portion I sucked by the intake / drain valve unit 34 and the drain portion O drained by the intake / drain valve unit 34 will be described.
First, as shown in FIGS. 1, 3, 4, and 6 to 9, the communication port 36 of the intake portion I is a water passage 10 a upstream of the water backflow prevention valve 14 in the faucet body 2. And a communication path 68.
In addition, the communication path 68 is a water passage through which water supplied from the water passage 10a upstream of the water backflow prevention valve 14 passes when the valve body 56 is closed.
Further, when a drain plug (not shown) on the upstream side of the water supply leg 6 is operated to the drain side, and the valve body 56 of the intake / drain valve unit 34 is opened, the communication port 36 becomes the first intake port 36. Thus, the air is sucked into the water passage 10a upstream of the water backflow prevention valve 14 from the first intake port 36 through the communication passage (intake passage) 68, and is upstream of the water backflow prevention valve 14. The water in the water passage 10 a and the water supply leg 6 is drained to the upstream side of the water supply leg 6.

Next, as shown in FIG. 1, FIG. 3, FIG. 4 and FIG. 7, the second intake port 38 of the intake portion I is hot water passing upstream of the hot water backflow prevention valve 12 in the faucet body 2. It communicates with the path 8a via a communication path (intake path) 82.
When the valve body 56 of the intake / drain valve unit 34 is opened by draining operation, the hot water passage 8a upstream of the hot water backflow prevention valve 12 from the second intake port 38 through the communication passage (intake passage) 82. The hot water in the hot water flow path 8 a upstream of the hot water backflow prevention valve 12 and the hot water in the hot water supply leg 4 is drained to the upstream side of the hot water supply leg 4.

Next, as shown in FIG. 1, FIG. 3, FIG. 4, FIG. 6 and FIG. 7, the third air inlet 40 of the air inlet I is connected to the thermo unit 16 from the water backflow prevention valve 14 in the faucet body 2. Is communicated with the water passage 10b through the communication passage (intake passage) 84.
On the other hand, the first drain port 48 of the drainage section O communicates with the water passage 10 b from the water backflow prevention valve 14 to the thermo unit 16 in the faucet body 2 through a communication passage (drainage passage) 86. .
When the valve body 56 of the intake / drain valve unit 34 is opened by draining operation, the water flow path 10b from the water backflow prevention valve 14 to the thermo unit 16 through the communication path (intake path) 84 from the third intake port 40. It is designed to be inhaled.
At the same time, the remaining water in the water flow path 10b from the water backflow prevention valve 14 to the thermo unit 16 passes through the communication path (drainage path) 86 and is downward from the first drainage port 48 as shown in FIGS. Are discharged to the outside of the faucet body 2 from the communication passages (drainage channels) 76, 78, 80.

Next, as shown in FIGS. 1, 3, 4, 6, and 7, the fourth intake port 42 of the intake portion I is connected to the thermo unit 16 from the hot water backflow prevention valve 12 in the faucet body 2. To the hot water passage 8b through the communication passage (intake passage) 88.
On the other hand, the second drainage port 50 of the drainage part O communicates with the hot water passage 8b from the hot water backflow prevention valve 12 in the faucet body 2 to the thermo unit 16 via a communication passage (drainage passage) 90. Yes.
When the valve body 56 of the intake / drain valve unit 34 is opened by draining operation, air is drawn into the hot water passage 8b from the hot water backflow prevention valve 12 to the thermo unit 16 through the communication passage 88 from the fourth air inlet 42. It has become so.
At the same time, remaining hot water in the hot water passage 8b from the hot water backflow prevention valve 12 to the thermo unit 16 passes through the communication passage (drainage passage) 90 from the second drainage port 50 as shown in FIGS. The water is discharged to the lower communication passages (drainage channels) 76, 78, and 80, and drained from the communication passages (drainage channels) 76, 78, and 80 to the outside of the faucet body 2.

Next, as shown in FIGS. 1 and 5, the thermo unit 16 has a hot water inflow portion 16 a into which hot water in the hot water passage 8 b on the upstream side flows in, and water in the water flow passage 10 b on the upstream side in the thermo unit 16. An inflowing water inflow portion 16b and a hot and cold water outflow portion 16c for allowing hot water and water to flow out from the hot water inflow portion 16a and the water inflow portion 16b by adjusting and mixing the amounts of hot water and water flowing out of the hot water inflow portion 16b and the water inflow portion 16b are provided. It is inclined and arranged in the faucet body 2 so as to incline downward from the hot water inflow portion 16a and the water inflow portion 16b toward the hot water outflow portion 16c.
As shown in FIGS. 1, 4, 6, and 7, the third drain port 52 of the drainage portion O is connected to the hot water inflow portion 16 a of the thermo unit 16 through the communication path (drainage channel) 92. The hot water / water mixing path 24 communicates from each of the water inflow portions 16b to the switching valve 26 of the switching unit 22.
When the valve body 56 of the intake / drain valve unit 34 is opened by draining operation, the water flow path 10b from the water backflow prevention valve 14 to the thermo unit 16 through the communication path (intake path) 84 from the third intake port 40. To the hot water flow path 8b from the hot water backflow prevention valve 12 to the thermo unit 16 through the communication passage 88, and the intake air outside is supplied to the thermo unit 16. After flowing into the thermo unit 16 from each of the hot water inflow part 16a and the water inflow part 16b, it flows into the hot water mixing path 24 to the switching valve 26 of the switching unit 22.
At the same time, the hot water remaining in the hot water mixing path 24 from each of the hot water inflow part 16 a and the water inflow part 16 b of the thermo unit 16 to the switching valve 26 of the switching unit 22 passes through the communication path (drainage path) 92 to the third. The drainage port 52 is discharged into the lower communication passages (drainage channels) 76, 78, 80, and is drained from the communication passages (drainage channels) 76, 78, 80 to the outside of the faucet body 2. .

Next, as shown in FIGS. 1, 3, 4, and 7, the fifth intake port 44 of the intake section I communicates with the flow path 94 from the switching valve 26 of the switching unit 22 to the currant 18 ( It communicates via an intake passage 96.
When the valve body 56 of the intake / drain valve unit 34 is opened by draining operation, the flow path from the switching valve 26 of the switching unit 22 to the currant 18 through the communication path (intake path) 96 from the fifth intake port 44. 94 is inhaled.
At the same time, hot water left in the flow path 94 from the switching valve 26 of the switching unit 22 to the currant 18 is drained from the currant 18 to the outside of the faucet body 2.

Next, as shown in FIG. 6, in the faucet body 2, a shower hose provided with a shower head 20 at the front end is provided at the rear right side and the lower right end of the discharge water switching handle 30 when viewed from the front side. A connecting member 98 for connecting 20a is attached.
In addition, as shown in FIGS. 1, 3, 4, 6, and 7, the sixth intake port 46 of the intake section I extends from the switching valve 26 of the switching unit 22 to the shower head 20 via the connecting member 98. The flow path 100 and the communication path (intake path) 102 communicate with each other.
On the other hand, the fourth drain port 54 of the drainage section O communicates with the flow path 100 from the switching valve 26 of the switching unit 22 through the connection member 98 to the shower head 20 via a communication path (drainage path) 104. Yes.
Furthermore, as shown in FIG. 6, the flow path 100 formed inside the shower hose connection member 98 is located above the fourth drain port 54 and the communication path (drainage channel) 104 of the drainage portion O. It is located above the lowest position of the drainage part O.

As shown in FIGS. 1, 3, 4, 6, and 7, when the water outlet (not shown) of the shower head 20 is positioned above the faucet body 2, the water draining operation is performed. When the valve body 56 of the intake / drain valve unit 34 is opened by this, air is sucked into the flow path 100 from the water discharge port (not shown) of the shower head 20 and the communication path (intake path) from the sixth air intake 46. The air is sucked into the flow path 100 from the switching valve 26 of the switching unit 22 to the shower head 20 via 102.
At the same time, the hot water remaining in the flow path 100 from the switching valve 26 of the switching unit 22 to the shower head 20 passes through the communication path (drainage path) 104 and extends downward from the fourth drainage port 54 (drainage path). The water is discharged to 76, 78, and 80, and drained from the communication passages (drainage channels) 76, 78, and 80 to the outside of the faucet body 2.
On the other hand, when the water discharge port (not shown) of the shower head 20 is positioned below the faucet body 2, the valve body 56 of the intake / drain valve unit 34 is opened by the draining operation. The intake port 46 sucks air into the flow path 100 from the switching valve 26 of the switching unit 22 to the shower head 20 via the communication path (intake path) 102.
At the same time, the hot water remaining in the flow path 100 from the switching valve 26 of the switching unit 22 to the shower head 20 passes through the communication path (drainage path) 104 and extends downward from the fourth drainage port 54 (drainage path). The water is discharged to 76, 78, and 80, and drained from the communication passages (drainage channels) 76, 78, and 80 to the outside of the faucet body 2. At this time, in a state where the water outlet (not shown) of the shower head 20 is placed on the floor or in a state where the water outlet is placed downward, the remaining water is also drained from the water outlet (not shown) of the shower head 20. Yes.

In the present embodiment, the water flow path 10b from the water backflow prevention valve 14 to the thermo unit 16 and the hot water inflow portion 16a and the water inflow portion 16b of the thermo unit 16 to the switching valve 26 of the switching unit 22 are provided. The hot water mixing path 24 is structurally connected to each other, from the hot water flow path 8b from the hot water backflow prevention valve 12 to the thermo unit 16, and from the hot water inflow part 16a and the water inflow part 16b of the thermo unit 16, respectively. Since the hot water / mixing passage 24 to the switching valve 26 of the switching unit 22 is also structurally connected to each other, a third passage for sucking the water passage 10b from the water backflow prevention valve 14 to the thermo unit 16 is used. When the intake port 40 and the communication passage (intake passage) 84 are omitted, or the hot water passage 8b from the hot water backflow prevention valve 12 to the thermo unit 16 is sucked. Even when the fourth intake port 42 and the communication passage (intake passage) 88 are omitted, the hot water inflow portion 16a and the water inflow portion 16b of the thermo unit 16 to the switching valve 26 of the switching unit 22 are provided. Therefore, either the third intake port 40 and the communication path (intake path) 84 or the fourth intake port 42 and the communication path (intake path) 88 can be used. Either of them may be omitted.
Further, a water flow path 10b from the water backflow prevention valve 14 to the thermo unit 16 and a hot water inflow section 16a of the thermo unit 16 and a hot water mixing path 24 from each of the water inflow section 16b to the switching valve 26 of the switching unit 22 are provided. The hot water flow path 8b from the hot water backflow prevention valve 12 to the thermo unit 16 and the hot water inlet portion 16a and the hot water inlet portion 16b of the thermo unit 16 are connected to each other. The hot and cold mixing channels 24 up to 26 are also in structural communication with each other. Therefore, at least the first drainage port 48 and the communication passage (drainage channel) 86 for draining the remaining water in the water passage 10b from the water backflow prevention valve 14 to the thermo unit 16 are provided, or hot water The second drain 50 and the communication passage (drainage) 90 for draining the remaining hot water in the hot water passage 8b from the backflow prevention valve 12 to the thermo unit 16 are provided at least, or the thermo unit 16 A third drainage port 52 and a communication passage (drainage channel) for draining hot water left in the hot water / mixing channel 24 from the hot water inlet 16a and the water inlet 16b to the switching valve 26 of the switching unit 22 92 should just be provided at least.

  According to the hot and cold water mixing faucet device 1 according to the first embodiment of the present invention described above, when a drain plug (not shown) on the upstream side of the water supply leg 6 is operated to the drain side, the water supply source (FIG. (Not shown) is stopped, the water pressure in the flow path on the upstream side of the water supply leg 6 is reduced, and a negative pressure is generated when the water pressure is lower than the atmospheric pressure. Water in the water passage 10 upstream of the water backflow prevention valve 14 is discharged through the water supply leg 6 to the upstream side of the water supply leg 6. Thereby, since the pressure in the flow path on the upstream side of the faucet body 2 becomes equal to or lower than atmospheric pressure, water is not supplied into the pressure chamber 66a through the communication path 68, and the pressure in the pressure chamber 66a decreases. Accordingly, there is no force to push the valve body 56 from the back side, and the biasing force of the coil spring 60 causes the valve body 56 to move in the valve opening state (left side direction in FIG. 8) from the valve closing state shown in FIG. The valve is opened as shown in FIG. 9, and the communication port 36 on the back surface of the faucet body 2 shown in FIG. 7, each intake port 38, 40, 42, 44, 46 and each drain port 48, 50, 52, 54 are simultaneously opened. Can be opened. At this time, since the valve body 56 is completely opened by the urging force of the coil spring 60, the communication chamber 66a is minimized, and the water in the pressure chamber 66a can be discharged more reliably.

Further, when the valve body 56 of the intake / drain valve unit 34 is opened by the water draining operation, the water flow path on the upstream side of the water backflow prevention valve 14 from the first intake port 36 through the communication path (intake path) 68. The water is sucked into 10 a and the water in the water passage 10 a upstream of the water backflow prevention valve 14 and the water in the water supply leg 6 is drained to the upstream side of the water supply leg 6.
At the same time, air is sucked into the hot water passage 8 a upstream of the hot water backflow prevention valve 12 from the second air intake 38 via the communication passage (intake passage) 82, and upstream of the hot water backflow prevention valve 12. Hot water in the hot water passage 8 a and the hot water supply leg 4 is drained to the upstream side of the hot water supply leg 4.
Furthermore, at the same time, air is sucked into the water flow path 10b from the water backflow prevention valve 14 to the thermo unit 16 through the communication path (intake path) 84 from the third intake port 40, and thereby the water backflow prevention valve 14 As shown in FIGS. 4, 6, and 9, the remaining water in the water passage 10 b up to the thermo unit 16 passes through the communication passage (drainage passage) 86 and communicates with the lower communication passage (drainage passage). ) Are discharged to the outside of the faucet body 2 from the communication passages (drainage passages) 76, 78, 80.
At the same time, air is drawn into the hot water passage 8b from the hot water backflow prevention valve 12 to the thermo unit 16 through the communication passage 88 from the fourth air inlet 42, so that the thermo unit 16 4 and 6, the remaining hot water in the hot water passage 8b passes through the communication passage (drainage passage) 90 and the communication passages (drainage passages) 76, 78 below the second drainage port 50. Then, the water is discharged to the outside of the faucet body 2 through the communication passages (drainage channels) 76, 78, and 80.
At the same time, the outside air sucked into the water passage 10b from the water backflow prevention valve 14 to the thermo unit 16 through the communication passage (intake passage) 84 from the third intake port 40 and the fourth intake port 42 Outside air sucked into the hot water passage 8b from the hot water backflow prevention valve 12 to the thermo unit 16 through the communication path 88 enters the thermo unit 16 from each of the hot water inflow portion 16a and the water inflow portion 16b of the thermo unit 16. After flowing in, the hot water flowing into the hot water / mixing path 24 to the switching valve 26 of the switching unit 22 and remaining in the hot / water mixing path 24 to the switching valve 26 of the switching unit 22 passes through the communication path (drainage path) 92. Then, the water is discharged from the third drain port 52 to the lower communication passages (drainage channels) 76, 78, 80, and is drained from the communication passages (drainage channels) 76, 78, 80 to the outside of the faucet body 2.
At the same time, the switching valve of the switching unit 22 is sucked into the flow path 94 from the switching valve 26 of the switching unit 22 to the currant 18 through the communication path (intake path) 96 from the fifth intake port 44. The hot water remaining in the flow path 94 from 26 to the currant 18 is drained from the currant 18 to the outside of the faucet body 2.
Furthermore, at the same time, when the water outlet (not shown) of the shower head 20 is positioned above the faucet body 2, the air is sucked into the channel 100 from the water outlet (not shown) of the shower head 20. In addition, the switching unit 22 is switched by being sucked into the flow path 100 from the switching valve 26 of the switching unit 22 to the shower head 20 via the communication path (intake path) 102 from the sixth intake port 46. Hot water left in the flow path 100 from the valve 26 to the shower head 20 is discharged from the fourth drainage port 54 to the lower communication paths (drainage paths) 76, 78, 80 through the communication path (drainage path) 104. Then, the water is discharged from the communication passages (drainage channels) 76, 78, and 80 to the outside of the faucet body 2. On the other hand, when the water outlet (not shown) of the shower head 20 is located below the faucet body 2, the switching unit is connected from the sixth air inlet 46 via the communication passage (intake passage) 102. The hot water remaining in the flow path 100 from the switching valve 26 of the switching unit 22 to the shower head 20 is sucked into the flow path 100 from the switching valve 26 of the switch 22 to the shower head 20, and the communication path (drainage channel) ) Is discharged from the fourth drainage port 54 to the lower communication passages (drainage channels) 76, 78, 80 via 104, and drained from the communication passages (drainage channels) 78 to the outside of the faucet body 2. At this time, in a state where the water outlet (not shown) of the shower head 20 is placed on the floor or in a state where the water outlet is arranged downward, the remaining water is also discharged from the water outlet (not shown) of the shower head 20.
As a result, the valve body 56 of the intake / drain valve body 32 of the intake / drain valve unit 34 is automatically opened simply by operating a drain plug (not shown) on the upstream side of the water supply leg 6 to the drain side. It can be made to valve, and the intake and drainage can be automatically performed on the faucet body 2. Therefore, it is possible to easily drain water from the faucet body 2 without touching the hot water / water faucet device 1 itself or requiring complicated operations. In addition, since the intake / drain valve body 32 is opened by a single draining operation, intake and drainage are simultaneously performed on the faucet body 2, so that water can be drained from the faucet body 2 efficiently and reliably. It can be performed.

  Furthermore, according to the hot and cold water mixing faucet device 1 according to the present embodiment, the intake ports 36, 38, 40, 42, 44, 46 and the drain ports 48, which are opened and closed by the intake / drain valve body 32 of the intake / drain valve unit 34. 50, 52, 54 are provided in the faucet body 2 itself, so that the water supply legs and hot water supply legs used in general areas other than cold regions, and general areas connected to them. As for the faucet body of the present invention, the water supply leg and the hot water supply leg used in the general place are used as they are, and only the faucet body for the general place is used as the faucet body 2 of the hot and cold water mixing faucet apparatus 1 of the present embodiment. It can be used in cold regions simply by replacing it, making it easy to use.

  Further, according to the hot and cold water mixing faucet device 1 according to the present embodiment, when the water supply from the water supply source (not shown) to the faucet body 2 is stopped by the water draining operation, a single intake / drain valve unit 34 is provided. Since the valve body 56 of the intake / drain valve body 32 is automatically opened and intake and drainage can be automatically performed with respect to the faucet body 2, the valve body 56 of a simple single intake / drain valve body 32 is provided. With this structure, water can be easily drained without requiring a complicated operation.

Furthermore, according to the hot and cold water mixing faucet device 1 according to the present embodiment, the water passage 10a upstream of the water backflow prevention valve 14 of the faucet body 2 and the communication port 36 on the back surface of the faucet body 2 are communicated. The communication path 68 communicates with the pressure chamber (back pressure chamber) 66a and the communication chamber 66b of the intake / drain valve unit 34, and is supplied with water from a water supply source (not shown). A part of the water supplied to the water flow path 10 a upstream of the water backflow prevention valve 14 passes through the communication path 68, passes through the communication chamber 66 b and the first communication hole 70 of the valve body 56, and the pressure chamber ( Back pressure chamber) 66a. Then, the water pressure in the pressure chamber (back pressure chamber) 66a presses the valve body 56 from the back side, and when the pressing force exceeds the urging force of the coil spring 60, the valve body 56 is closed, and the faucet body 2, the respective intake ports 38, 40, 42, 44, 46 and the respective drain ports 48, 50, 52, 54 are closed simultaneously.
On the other hand, when a drain plug (not shown) on the upstream side of the water supply leg 6 is operated to the drain side, water supply from a water supply source (not shown) is stopped, and the upstream side of the water supply leg 6 is stopped. When the water pressure in the flow path decreases and becomes equal to or lower than the atmospheric pressure, a negative pressure is generated. By this negative pressure, water in the water flow path 10 upstream of the water backflow prevention valve 14 of the faucet body 2 is discharged. The water is discharged to the upstream side of the water supply leg 6 through the water supply leg 6. Therefore, since the pressure in the flow path on the upstream side of the faucet body 2 is equal to or lower than the atmospheric pressure, water flows into the pressure chamber 66a from the communication path 68 through the communication path 66b and the first communication hole 70 of the valve body 56. The pressure is not supplied and the pressure in the pressure chamber 66a decreases. As a result, there is no force to push the valve body 56 from the back side, and the urging force of the coil spring 60 moves the valve body 56 in the valve opening state (left side direction in FIG. 8) from the valve closing state shown in FIG. 9, the communication port 36 on the back surface of the faucet body 2, each intake port 38, 40, 42, 44, 46 and each drain port 48, 50, 52, 54 are opened simultaneously. .
In addition, when the valve body 56 is opened, intake air is taken into the pressure chamber 66a and the communication chamber 66b from the communication passage (intake passage) 74 and the water in the pressure chamber 66a and the communication chamber 66b is connected to the communication passage (drainage). Since the water can be discharged to the outside of the faucet body 2 through the passages 76, 78, 80, etc., it is possible to prevent water from remaining in the pressure chamber 66a and the communication chamber 66b and freezing.

  Further, according to the hot and cold water mixing device 1 according to the present embodiment, the valve body 56 of the intake / drain valve body 32 of the intake / drain valve unit 34 is a diaphragm type valve body that opens and closes in the pressure chamber 66a by water pressure. The opening / closing movement of the intake / drain valve body 32 can be improved by smoothly opening and closing the water by the water pressure in the pressure chamber 66a.

Furthermore, according to the hot and cold water mixing faucet device 1 according to the present embodiment, the water supplied to the faucet body 2 from the water supply source (not shown) is the valve body 56 of the intake / drain valve body 32 of the intake / drain valve unit 34. Can pass through the first communication hole 70 of the valve body 56 formed in the valve body 56 and flow into the pressure chamber 66a on the back pressure side of the valve body 56, and the pressure of the water flowing into the pressure chamber 66a causes the valve body 56 can easily move in the closing direction.
On the other hand, water supply from the water supply source (not shown) to the faucet body 2 is stopped by a draining operation in which a drain plug (not shown) on the upstream side of the water supply leg 6 is operated to the drain side. Since the water pressure on the upstream side of the faucet body 2 decreases, the pressure of the water flowing through the first communication hole 70 of the valve body 56 and flowing into the pressure chamber 66a on the back pressure side decreases. The body 56 can easily move in the opening direction.
Therefore, the first communication hole 70 for supplying water into the pressure chamber 66a on the back pressure side is provided in the valve body 56, and the water can be easily drained without requiring a complicated operation. it can.

  Further, according to the hot and cold water mixing apparatus 1 according to the present embodiment, the intake / drain valve unit 34 includes the manual operation knob member 81 capable of sliding the valve body 56 in the front-rear direction. Therefore, a drain plug (not shown) on the upstream side of the water supply leg 6 is operated to the drain side, water supply to the faucet body 2 is stopped, and the valve body 56 of the intake / drain valve body 32 is opened. Even if the valve body 56 of the intake / drain valve main body 32 is fixed and remains in the closed state, it is necessary to manually pull the manual operation knob member 81 to the back side. By operating, the valve body 56 of the intake / drain valve body 32 can be forcibly opened, so that water can be drained reliably.

  Furthermore, according to the hot and cold water mixing faucet device 1 according to the present embodiment, the thermo unit 16 is placed in the faucet body 2 so as to incline downward from the hot water inflow portion 16a and the water inflow portion 16b toward the hot water outflow portion 16c. Since it is arranged at an inclination, when the water supply from the water supply source (not shown) to the faucet body 2 is stopped by the draining operation, the remaining water in the thermo unit 16 is discharged from the hot water outflow portion 16c. Can be easier. Therefore, it is possible to prevent water from remaining in the thermo unit 16 and freeze it, and damage to the thermo unit 16 due to freezing can be prevented.

  In addition, according to the hot and cold water mixing faucet device 1 according to the present embodiment, the flow path 100 formed in the shower hose connection member 98 includes the fourth drainage port 54 and the communication path (drainage path) of the drainage portion O. It is located above 104 and is located above the lowest position of the drainage part O. Accordingly, when the water supply from the water supply source (not shown) to the faucet body 2 is stopped by the draining operation, the water flows into the flow channel 100 of the shower hose connection member 98 from the flow channel 100 of the shower hose 20a. The remaining water can be reliably drained from the fourth drain port 54 of the drainage portion O that is opened and closed by the valve body 56 of the intake drain valve main body 32 through the communication path (drainage channel) 104, and the shower hose connection member 98. It is possible to prevent water from remaining in the flow channel 100 and freezing.

  In addition, in this embodiment, although the form which drains the water inside the faucet main body 2 directly to the exterior of the faucet main body 2 through the communicating path (drainage channel) 76,78,80 was demonstrated, the communicating path (Drainage channels) 76, 78, and 80 may be connected to the water discharge portion of the currant 18 and / or the shower head 20 so that the water is indirectly discharged to the outside of the faucet body 2 through these water discharge portions.

Next, with reference to FIGS. 10 to 17, a hot and cold water mixing apparatus according to a second embodiment of the present invention will be described.
First, FIG. 10 is a perspective view of a hot and cold water mixing device according to a second embodiment of the present invention as viewed obliquely from the rear.
As shown in FIG. 10, a hot and cold water mixing apparatus 200 according to the second embodiment of the present invention mixes hot water supplied from a hot water supply source (not shown) and water supplied from a water supply source (not shown). Then, by operating the single operation handle 202, hot water adjusted in the flow rate and temperature of hot water can be discharged from the water outlet 206 at the tip of the spout 204, so-called single lever type hot water mixed water. It is a stopper device.

That is, the hot and cold water mixing apparatus 200 according to the present embodiment includes a faucet body 208 disposed on a counter B of a kitchen sink or a wash basin, and an operation handle 202 provided on the upper part of the faucet body 208. ing.
The operation handle 202 can be rotated to a predetermined rotation angle θ (hereinafter referred to as “flow adjustment operation angle θ”) in a vertical plane around a predetermined operation axis A1 extending horizontally and horizontally with respect to the faucet body 208. The hot water mixing faucet device 200 can be controlled to adjust the discharged water flow rate from the water stop state to the maximum water discharge state according to the flow adjustment operation angle θ.
Further, the operation handle 202 is rotated at a predetermined rotation angle φ (hereinafter referred to as “temperature adjustment operation angle φ”) in a horizontal plane around a predetermined operation axis A2 extending in the vertical direction with respect to the faucet body 208. It is possible to adjust the temperature of hot water discharged from the water outlet 206 of the spout 204 of the hot and cold water mixing device 200 according to the temperature adjustment operation angle φ.

That is, when the operation handle 202 is rotated upward (at the “open” direction shown in FIG. 10) at a predetermined flow adjustment operation angle θ around a predetermined operation axis A <b> 1, the spout 204 is discharged from the water outlet 206. The amount of hot water discharged from the water outlet 206 of the spout 204 increases as the flow control angle θ for turning the operation handle 202 is set larger. It is set up.
On the other hand, for example, when the operation handle 202 is rotated downward (in the “closed” direction shown in FIG. 10) so that the flow adjustment operation angle θ becomes 0 °, the spout 204 discharges from the spout 204. The hot water to be used is set to a still water stop state.

Furthermore, when the operation handle 202 is rotated around the predetermined operation axis A2 at the predetermined temperature adjustment operation angle φ in the direction of “C” shown in FIG. 10, the temperature adjustment operation angle φ is large. The temperature of the hot water discharged from the spout 206 of the spout 204 is set to a lower temperature.
On the other hand, when the operation handle 202 is rotated about a predetermined operation axis A2 at a predetermined temperature adjustment operation angle φ in the direction of “H” shown in FIG. 10, the temperature adjustment operation angle φ is large. The temperature of hot water discharged from the spout 206 of the spout 204 is set to a higher temperature side.

Next, as shown in FIG. 10, below the faucet body 208, a water supply pipe 210 that supplies water supplied from a water supply source (not shown) such as a water pipe into the faucet body 208, A hot water supply pipe 212 for supplying hot water from a hot water heater (not shown), which is a hot water supply source, is provided.
In addition, a drain plug (not shown) that is operated when draining water from the hot and cold water mixing apparatus 200 in a cold district or the like is provided in the flow path upstream of the water supply pipe 210. .
Further, on the back side of the faucet body 208, an intake / drain valve unit 216 (details will be described later) provided with an intake / drain valve body 214 that opens and closes by the water pressure upstream of the water supply pipe 210, and the intake / drain valve unit 216. When the intake / drain valve main body 214 is opened, the communication portion C (which will be described in detail later) that enables intake and drainage, and the intake / drain valve main body 214 of the intake / drain valve unit 216 open, allow drainage. A drainage portion D (details will be described later) is provided.

When a drain plug (not shown) on the upstream side of the water supply pipe 210 is operated to the drain side, water supply from the water supply source (not shown) to the faucet body 208 is stopped, and the upstream side of the water supply pipe 210 As the water pressure in the flow path decreases, a negative pressure is generated, and the intake / drain valve body 214 of the intake / drain valve unit 216 is opened.
As a result, after the outside air is sucked into the flow passage in the faucet body 208, which will be described in detail later, from the water outlet 206 of the spout 204, it is automatically sucked into the communicating portion C.
Further, the hot water and / or water in the communication part C is automatically drained to the upstream side of each of the water supply pipe 210 and the hot water supply pipe 212 and drained by an intake drain valve unit 214 which will be described in detail later. The water is automatically drained from the part D to the outside of the faucet body 208.

Next, the internal structure of the faucet body of the hot / cold water faucet device of this embodiment will be described with reference to FIGS.
FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 10, and is a front cross-sectional view including a hot water passage and a front cross section of the water passage in the hot and cold water mixing device according to the second embodiment of the present invention.
FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. 11, and is a side cross-sectional view including a right side cross-section of a water passage in the hot and cold water mixing device according to the second embodiment of the present invention.
Furthermore, FIG. 13 is sectional drawing along the XIII-XIII line | wire of FIG. 11, and is a center side sectional view in the hot water-mixing faucet device by 2nd Embodiment of this invention.
FIG. 14 is a cross-sectional view taken along the line XIV-XIV in FIG.

  First, as shown in FIGS. 11, 12, and 14, a water passage 218 through which water supplied from a water supply pipe 210 below (upstream) passes is formed in the faucet body 208 so as to extend in the vertical direction. In addition, the hot water passage 220 through which hot water supplied from the lower (upstream) hot water supply pipe 212 passes is formed to extend in the vertical direction. The upper end portions (downstream end portions) of the water passage 218 and the water passage 220 are respectively connected to the water passage 224a and the hot water passage of the fixed valve body 224 of the valve unit 222 built in the faucet body 208. Connected to each of the paths 224b.

Next, as shown in FIGS. 11 to 13, the valve unit 222 is disposed below and is fixedly attached to the fixed valve body 224 so as to be slidable and rotatable with respect to the upper surface of the fixed valve body 224. A valve body 226 and a connection lever 228 for connecting the movable valve body 226 and the operation handle 202 are provided. The connection lever 228 can slide the movable valve body 226 in the front-rear direction along the upper surface of the fixed valve body 224 by the operation of the flow operation angle θ by the operation handle 202. By operating the adjustment operation angle φ, the connection lever 228 can rotate the movable valve body 226 within the upper surface of the fixed valve body 224.
Further, as shown in FIGS. 13 and 14, the water supplied from the water passage 224 a of the fixed valve body 224 and the fixed valve body in a state where the movable valve body 226 is opened at the center of the movable valve body 226. A mixing chamber 226a in which hot water supplied from the hot water passage 224b of 224 is mixed is formed.
When the movable valve body 226 is opened, the mixing chamber 226 a communicates with at least one of the water passage 224 a and the hot water passage 224 b of the fixed valve body 224. The mixed hot water flows into the hot water mixing path 224c of the fixed valve body 224 below (downstream side) of the mixing chamber 226a of the movable valve body 226.

Furthermore, as shown in FIGS. 11, 13, and 14, a hot and cold mixing path 230 is formed on the back side of the water passage 218 and the hot water passage 220 in the faucet body 208. 230 is connected to a hot water mixing path 224c of the fixed valve body 224, and a downstream side of the hot water mixing path 230 communicates with a flow path 204a (see FIG. 13) in the spout 204. Yes.
With these configurations, the movable valve body 226 functions as an on-off valve that opens and closes the water passage 224a and the hot water passage 224b of the fixed valve body 224 according to the operation of the flow rate operation angle θ by the operation handle 202, and the spout 204 discharges. It is possible to switch between water discharge and water stop from the water port 206, and the fixed valve body 224 from each of the water passage 224a and the hot water passage 224b of the fixed valve body 224 according to the operation of the temperature adjustment operation angle φ by the operation handle 202. The temperature of the hot water is adjusted by adjusting the amount of hot water and water flowing into the hot water mixing path 224 c of the hot water, and the temperature-adjusted hot water is supplied from the hot water mixing path 230 of the faucet body 208 into the spout 204. Water is discharged from the water outlet 206 of the spout 204 through the flow path 204a.

Next, referring to FIG. 10 to FIG. 17, the intake and drain valve unit 216 of the hot and cold water mixing faucet device 200 of the present embodiment and the intake and drain valve main body 214 of the intake and drain valve unit 216 are opened to thereby The details of the communication part C that enables drainage and the drainage part D that enables intake and drainage by opening the intake / drain valve body 214 by the intake / drain valve unit 216 will be described.
15 is an exploded perspective view of an intake / drain valve unit of a hot and cold water mixing device according to a second embodiment of the present invention, and FIG. 16 is a hot water and water mixing device according to the second embodiment of the present invention shown in FIG. FIG. 17 is a partially enlarged cross-sectional view showing a partially enlarged intake / drain valve unit of FIG. 17, and FIG. It is a partial expanded sectional view shown expanding.

First, as shown in FIGS. 15 to 17, the intake / drain valve body 214 of the intake / drain valve unit 216 is opened at the intake / drain valve unit mounting portion A on the back surface of the faucet body 208 to which the intake / drain valve unit 216 is attached. As the communication portion C that enables intake and drainage by valve opening, the first communication port 232 that is always open regardless of whether the intake / drain valve body 214 is opened or closed, and the second communication port that is opened / closed by the intake / drain valve body 214 A port 234 and a third communication port 236 are formed.
In addition, the intake / drain valve unit mounting portion A on the back surface of the faucet body 208 has a drain port as a drain portion D that allows intake and drainage by opening the intake / drain valve body 214 of the intake / drain valve unit 216. 238 is formed.

Next, the intake / drain valve main body 214 of the intake / drain valve unit 216 is connected to the communication ports 234 and 236 and the drain port 238 other than the communication port 232 that is always open on the rear surface of the faucet body 208. A single diaphragm type valve element 240 that opens and closes simultaneously.
Further, as shown in FIG. 15, the intake / drain valve unit 216 includes a coil spring 244 that is attached to the communication ports 232, 234, 236 on the back surface of the faucet body 208 and a spring attachment hole 242 at the center of the drain port 238, The coil spring 244 biases the valve body 240 from the front side toward the rear side.
Further, as shown in FIGS. 15 to 17, the intake / drain valve unit 216 includes a holding member 246 that is attached to the back side of the valve body 240 and holds the valve body 240, and faces the holding member 246. It is fixed to the back surface of the faucet body 208 with bolts 248.

Further, on the front side of the holding member 246, a valve chamber 250 (see FIG. 17) in which the valve body 240 is accommodated is formed as a part of the communication portion C. The valve chamber 250 is connected to the valve body 240. On the other hand, a pressure chamber (back pressure chamber) 250a for applying water pressure from the back side, and each communication port 232 of the communication portion C formed on the front side of the valve body 240 and the valve body 240 being opened. , 234, 236 and a communication chamber 250b communicating with the drainage port 238 of the drainage part D.
Note that the valve body 240 shown in FIGS. 16 and 17 is in a closed state.

Next, as shown in FIG. 11, FIG. 12, FIG. 15, and FIG. 16, the water faucet body 208 has a water passage 218 upstream of the movable valve body 226 and a first back surface of the faucet body 208. A first communication path 252 that communicates with the communication port 232 is formed as a part of the communication portion C. Further, the communication chamber 250b is always in communication with the first communication port 232 and the first communication passage 252 of the communication portion C regardless of whether the valve body 240 is opened or closed.
Similarly, as shown in FIGS. 11 and 16, the second communication path that allows the hot water passage 220 upstream of the movable valve body 226 to communicate with the second communication port 234 on the back surface of the faucet body 208 is also illustrated. 254 is formed as a part of the communication part C. In addition, the communication chamber 250b communicates with the second communication port 234 and the second communication passage 254 of the communication portion C in a state where the valve body 240 is opened.
Further, as shown in FIGS. 15 and 16, the valve body 240 is in communication with the first communication passage 252 and the first communication port 232 of the faucet body 208 and the pressure chamber 250a and the communication chamber 250b. A hole 256 is formed, and a part of the water supplied from the water supply pipe 210 to the water passage 218 of the faucet body 208 passes through the communication passage 252 and passes through the communication chamber 250 b and the communication hole 256 of the valve body 240. It flows into the pressure chamber (back pressure chamber) 250a. Then, the water pressure in the pressure chamber (back pressure chamber) 250a presses the valve body 240 from the back side, and when the pressing force exceeds the urging force of the coil spring 244, the valve body 240 is closed, and the faucet body The communication ports 234 and 236 and the drainage port 238 on the back surface of 208 are closed at the same time.

  Next, as shown in FIGS. 15 and 17, in the faucet body 208, the middle of the hot water / mixing channel 230 and the third communication port 236 and the communication chamber 250 b on the back surface of the faucet body 208 are communicated. Three communication paths 258 are formed. In addition, the communication chamber 250b communicates with the third communication port 236 and the third communication passage 258 of the communication portion C in a state where the valve body 240 is opened.

As shown in FIGS. 15 and 17, the faucet body 208 is provided with a drain outlet 260 as a part of the drainage portion D in the vicinity below the intake drain valve unit 216.
Furthermore, between the drain outlet 260 and the drain outlet 238 in the faucet body 208, after extending a predetermined distance from the drain outlet 238 to the front side, it bends downward and extends downward by a predetermined distance, and again to the rear side. A drainage channel 262 that is bent and extends rearward a predetermined distance is formed as a part of the drainage portion D.

When a drain plug (not shown) on the upstream side of the water supply pipe 210 is operated to the water drain side, the water supply from the water supply pipe 210 to the water passage 218 of the faucet body 208 is stopped, and the upstream side of the water supply pipe 210. As the water pressure in the flow path decreases, a negative pressure is generated, and the negative pressure causes water in the water passage 218 of the faucet body 208 to be discharged to the upstream side of the water supply pipe 210 through the water supply pipe 210. It has become.
Therefore, when the pressure in the flow path on the upstream side of the faucet body 208 is equal to or lower than the atmospheric pressure, the first communication path 252, the first communication port 232, and the communication hole 256 of the valve body 240 from the water flow path 218. Through this, water is no longer supplied into the pressure chamber (back pressure chamber) 250a, and the pressure in the pressure chamber 250a decreases. Accordingly, the valve body 240 is moved in the valve opening state from the closed state shown in FIG. 16 (the right side direction in FIG. 16) by the biasing force of the coil spring 244 without the force of pushing the valve body 240 from the back side. Then, the second communication port 234, the third communication port 236, and the drain port 238 on the back surface of the faucet body 208 are also opened at the same time.

  In the present embodiment, the valve body 240 of the intake / drain valve body 214 of the intake / drain valve unit 216 will be described with respect to a form in which a single diaphragm type valve body 240 is employed. However, the present invention is not limited to such a form. A piston-type valve body that slides in the front-rear direction may be employed, or the communication ports 234 and 236 and the drain port 238 may be simultaneously opened and closed by a plurality of valve bodies.

According to the hot and cold water mixing faucet device 200 according to the second embodiment of the present invention described above, the first communication portion C that connects the water passage 218 upstream of the mixing chamber 226a of the movable valve body 226 and the communication chamber 250b. The communication passage 252 and the first communication port 232 are formed in the faucet body 208. Further, the faucet body 208 is provided with a second communication passage 254 and a second communication port 234 of the communication portion C that connect the hot water passage 220 and the communication chamber 250b upstream of the mixing chamber 226a of the movable valve body 226. Is formed. Further, the faucet body 208 is provided with a third communication passage 258 and a third communication port 236 of the communication part C for communicating the hot water / water mixing passage 230 downstream of the mixing chamber 226 a of the movable valve body 226 and the communication chamber 250 b. Is formed. Further, the intake / drain valve main body 214 of the intake / drain valve unit 216 provided in the valve chamber 250 extends from the water passage 218 of the faucet body 208 to the first communication passage 252 and the first communication port 232 of the communication portion C. The second communication passage 254 and the second communication port 234 of the communication portion C are opened and closed by the communication chamber 250b, the communication hole 256 of the valve body 240, and the water pressure flowing into the pressure chamber 250a. The communication passage 258 and the third communication port 236 are opened and closed, and the drain port 238 of the drainage part D is opened and closed.
Therefore, when a drain plug (not shown) on the upstream side of the water supply pipe 210 is operated to the drain side, water supply from the water supply source (not shown) to the faucet body 208 is stopped, and the faucet body 208 is stopped. When the pressure of the water flowing into the pressure chamber 250a of the communication part C from the water passage 218 of the communication part C decreases, the intake / drain valve body 214 automatically opens, and the communication ports 232, 234, 236 and the drainage of the communication part C are opened. The mouth 238 is opened.
As a result, the water is sucked into the hot water / mixing passage 230 upstream of the spout 204 of the spout 204 and is communicated from the hot / water mixing passage 230 via the third communication passage 258 and the third communication port 236 of the communication portion C. By being sucked into 250 b, hot water in the hot water / mixing channel 230 is drained into the communication chamber 250 b through the third communication passage 258 and the third communication port 236 of the communication portion C.
Then, the wastewater in the communication chamber 250 b is drained from the drainage port 238 of the drainage part D through the drainage channel 262 and from the lower drainage port 260 to the outside of the faucet body 208.
As a result, the intake drain valve body 214 of the intake drain valve unit 216 is automatically opened by a drain operation in which a drain plug (not shown) on the upstream side of the water supply pipe 210 is operated to the drain side. Intake and drainage can be automatically performed in the faucet body 208.
Therefore, water can be easily drained from the faucet body 208 without touching the hot water / water faucet device 200 itself or requiring a complicated operation.
In addition, since the intake / drain valve body 214 of the intake / drain valve unit 216 is automatically opened by a single draining operation, intake and drainage are simultaneously performed on the faucet body 208, so that it is efficient and reliable. In addition, the water in the faucet body 208 can be drained.

  In addition, according to the hot and cold water mixing apparatus 200 according to the second embodiment of the present invention, the faucet body 208 is provided with the drain outlet 260 as a part of the drainage part D near the lower part of the intake drain valve unit 216. Yes. Accordingly, a drain plug (not shown) on the upstream side of the water supply pipe 210 is operated to the water drain side, water supply from the water supply pipe 210 to the water passage 218 of the water faucet body 208 is stopped, and the intake drain valve main body 214 When the valve body 240 is opened, drainage in the communication chamber 250b drained from the hot water / mixing channel 230 through the third communication passage 258 and the third communication port 236 of the communication portion C is performed in the drainage portion D. Since water can be drained from the drainage port 238 through the drainage channel 262 to the outside of the faucet body 208 from the lower drainage port 260, drainage in the faucet body 208 can be performed more efficiently.

  Furthermore, according to the hot and cold water mixing faucet device 200 according to the second embodiment of the present invention, when the water supply from the water supply source (not shown) to the water supply path 218 of the faucet body 208 is stopped by the water draining operation, The valve body 240 of the single intake / drain valve body 214 of the drain valve unit 216 is automatically opened, and intake and drainage can be automatically performed with respect to the communication portion C of the faucet body 208, and the faucet body 208 Since the drainage part D can be automatically drained, the structure of the valve body 240 of the simple single intake / drainage valve body 214 can be easily drained without requiring a complicated operation. Can do.

Further, according to the hot and cold water mixing faucet device 200 according to the second embodiment of the present invention, the hot water and water mixing at the upstream side of the mixing chamber 226a of the movable valve body 226 and the downstream side of the mixing chamber 226a of the movable valve body 226 are performed. A pressure chamber 250a into which water supplied from a water supply source (not shown) to the water passage 218 of the faucet body 208 flows is provided between the passage 230 and the intake / drain valve body 214 is connected to the pressure chamber 250a. A valve body 240 is provided which is provided in the inside and on which the water pressure in the pressure chamber (back pressure chamber) 250a acts.
The valve body 240 is formed with a communication hole 256 that allows the first communication passage 252 and the first communication port 232 of the faucet body 208 to always communicate with the pressure chamber 250a and the communication chamber 250b. In the vicinity of the intake / drain valve unit 216 of the plug body 208, there is provided a communication portion C that allows intake and drainage of the pressure chamber 250a and the communication chamber 250b by opening the intake / drain valve body 214. .
Therefore, water supply operation stops water supply from a water supply source (not shown) to the water supply passage 218 of the faucet body 208, the water pressure in the pressure chamber (back pressure chamber) 250a decreases, and the valve body 240 opens. In this case, the outside air sucked from the water outlet 206 of the spout 204 is sucked from the hot water / mixing passage 230 through the third communication passage 258 of the communication portion C into the communication chamber 250b from the third communication port 236. As a result, hot water and / or water in the communication chamber 250 b is drained from the drain outlet 238 of the drainage part D through the drainage channel 262 and from the lower drainage outlet 260 to the outside of the faucet body 208. Therefore, it is possible to prevent water from remaining in the pressure chamber 250a and the communication chamber 250b and freezing.

  Furthermore, according to the hot and cold water mixing faucet device 200 according to the second embodiment of the present invention, the valve body 240 of the intake / drain valve body 214 opens and closes in the pressure chamber (back pressure chamber) 250a by water pressure. Since it is 240, it can be smoothly opened and closed by the water pressure in the pressure chamber (back pressure chamber) 250a, and the opening and closing performance of the intake / drain valve body 214 can be improved.

Moreover, according to the hot and cold water mixing apparatus 200 according to the second embodiment of the present invention, the water supplied from the water supply source (not shown) to the water supply path 218 of the faucet body 208 is the first of the communication part C. Via the communication passage 252, the first communication port 232, and the communication chamber 250b, the valve body 240 can pass through the communication hole 256 and flow into the pressure chamber (back pressure chamber) 250a. The valve body 240 can be easily moved in the closing direction by the pressure of the water flowing into the pressure chamber 250a.
On the other hand, when water supply from the water supply source (not shown) to the water supply path 218 of the faucet body 208 is stopped by the draining operation, the water pressure on the upstream side of the water passage 218 of the faucet body 208 decreases. Water flowing into the pressure chamber (back pressure chamber) 250a through the communication hole 256 of the valve body 240 through the first communication passage 252 of the communication portion C, the first communication port 232, and the communication chamber 250b. Therefore, the valve body 240 can easily move in the opening direction. Therefore, water can be easily drained without a complicated operation with a simple structure in which the valve body 240 is provided with a communication hole 256 for supplying water into the pressure chamber (back pressure chamber) 250a. .

  In the hot water / mixing faucet device 200 according to the second embodiment of the present invention described above, the intake / drain valve unit 216 of the intake / drain valve unit 34 of the hot water / mixture faucet device 1 according to the first embodiment of the present invention described above is used. Although the embodiment in which the knob member 81 for manual operation is not provided has been described, the present invention is not limited to such an embodiment, and the manual operation of the intake / drain valve unit 34 of the hot and cold water mixing faucet device 1 according to the first embodiment of the present invention. A manual operation section similar to the knob member 81 is provided, and even if the valve body 240 of the intake / drain valve body 216 is stuck and closed during the draining operation, it is for manual operation. It may be possible to forcibly open the valve body 240 of the intake / drain valve main body 214 by manually operating the knob member 81 so as to pull the knob member 81 toward the back side.

Next, a hot and cold water mixing faucet device according to a third embodiment of the present invention will be described with reference to FIG.
FIG. 18 is a side cross-sectional view along the right side cross-section of the water passage in the hot and cold water mixing faucet device according to the third embodiment of the present invention.
In addition, in the hot / cold water faucet device 300 according to the third embodiment of the present invention shown in FIG. 18, the same parts as those of the hot / cold water faucet device 200 according to the second embodiment of the present invention shown in FIGS. Reference numerals are assigned and description thereof is omitted.

As shown in FIG. 18, in the hot and cold water mixing faucet device 300 according to the third embodiment of the present invention, the communicating portion is connected to the intake / drain valve unit mounting portion A on the back surface of the faucet body 306 to which the intake / drain valve unit 216 is attached. The C first communication port 232 and the first communication channel 252, the second communication port 234 and the second communication channel 254, and the third communication port 236 and the third communication channel 258 are formed. In this respect, the drainage port 238 and the drainage port 260 of the drainage part C of the hot and cold water mixing faucet device 200 according to the second embodiment of the present invention are the same as the hot water mixing faucet device 200 according to the second embodiment of the present invention described above. And the drainage channel 262 is not provided.
In FIG. 18, the valve body 240 of the intake / drain valve main body 214 of the intake / drain valve unit 216 is shown in an open state, and the flow of intake and drainage in the communication portion C during the draining operation is shown. Shown with arrows.

According to the hot and cold water mixing faucet device 300 according to the third embodiment of the present invention described above, when a drain plug (not shown) on the upstream side of the water supply pipe 210 is operated to the drain side, a water supply source (not shown). The water supply to the faucet body 308 is stopped, and the pressure of the water flowing from the water passage 218 of the faucet body 308 into the pressure chamber 250a of the communication section C decreases, the intake / drain valve body 214 automatically The valve is opened, and the communication ports 232, 234, 236 of the communication part C are opened.
As a result, the water is sucked into the hot water / mixing passage 230 upstream of the spout 204 of the spout 204 and is communicated from the hot / water mixing passage 230 via the third communication passage 258 and the third communication port 236 of the communication portion C. By being sucked into 250 b, hot water in the hot water / mixing channel 230 is drained into the communication chamber 250 b through the third communication passage 258 and the third communication port 236 of the communication portion C.
Then, by sucking air from the communication chamber 250b into the first communication port 232 and the first communication passage 252 of the communication portion C, a part of the drainage in the communication chamber 250b is transferred to the first communication port of the communication portion C. After being drained to the water passage 218 upstream of the mixing chamber 226 a of the movable valve body 226 through the second communication path 252 and the first communication path 252, the water is drained to the upstream side of the water supply pipe 210.
At the same time, a portion of the waste water in the communication chamber 250b is sucked into the second communication port 234 of the communication portion C by being sucked into the second communication port 234 and the second communication passage 254 of the communication portion C from the communication chamber 250b. The water is drained to the hot water passage 220 upstream of the mixing chamber 226 a of the movable valve body 226 through the second communication passage 254 and the second communication passage 254, and then to the upstream side of the hot water supply pipe 212.
As a result, the intake drain valve body 214 of the intake drain valve unit 216 is automatically opened by a drain operation in which a drain plug (not shown) on the upstream side of the water supply pipe 210 is operated to the drain side. Intake and drainage can be automatically performed in the faucet body 208.
Therefore, water can be easily drained from the faucet body 308 without touching the hot water / mixing faucet device 300 itself or requiring a complicated operation.

In addition, in the hot water / mixing faucet device 300 according to the third embodiment of the present invention, as an example, the drain outlet of the drainage section C of the hot water / mixing faucet device 200 according to the second embodiment of the present invention shown in FIGS. 238, the drain port 260 and the drainage channel 262 are omitted. However, the present invention is not limited to such a mode, and as a modification of the hot and cold water mixing apparatus according to the third embodiment of the present invention, Alternatively, the drainage means 238, 260, 262 may be omitted.
According to the modified example of the hot and cold water mixing faucet device according to the third embodiment of the present invention, the water supply from the water supply source (not shown) to the water supply passage 218 of the faucet body 308 is stopped by the draining operation. When the water pressure in the pressure chamber (back pressure chamber) 250a decreases and the valve body 240 is opened, the outside air sucked from the water discharge port 206 of the spout 204 passes through the hot water / mixing channel 230 to the third portion of the communication portion C. The air is sucked into the communication chamber 250b from the third communication port 236 through the communication passage 258. As a result, the hot water and / or a part of the water in the communication chamber 250b passes through the first communication port 232 and the first communication passage 252 of the communication part C, and is upstream of the mixing chamber 226a of the movable valve body 226. After draining into the water passage 218, the water can be drained to the upstream side of the water supply pipe 210.
At the same time, the hot water and / or a part of the water in the communication chamber 250 b passes upstream of the mixing chamber 226 a of the movable valve body 226 via the second communication port 234 and the second communication passage 254 of the communication portion C. After draining to the hot water passage 220 on the side, the water can be drained to the upstream side of the hot water supply pipe 212.
Furthermore, at the same time, a part of the drainage in the communication chamber 250b can be drained from the drainage port 238 of the drainage part D through the drainage channel 262 and from the lower drainage port 260 to the outside of the faucet body 308. The water in the faucet body 308 can be drained efficiently and reliably. Further, it is possible to reliably prevent water from remaining in the pressure chamber 250a and the communication chamber 250b and freezing.

DESCRIPTION OF SYMBOLS 1 Hot water mixing faucet device by 1st Embodiment of this invention 2 Water faucet main body 4 Hot water supply leg 6 Water supply leg 8 Hot water passage 8a )
8b Hot water passage from hot water backflow prevention valve to thermo unit
(3rd flow path, 7th flow path)
10 water flow path 10a Water flow path upstream of the water backflow prevention valve (first flow path)
10b Water passage from the backflow prevention valve for water to the thermo unit
(3rd flow path, 6th flow path)
12 Backflow prevention valve for hot water 14 Backflow prevention valve for water 16 Thermo unit (hot water mixing section, temperature control function section)
16a Hot water inlet part of thermo unit (hot water inlet part of temperature control function part)
16b Water inflow part of thermo unit (water inflow part of temperature control function part)
16c Hot water outflow part of thermo unit (hot water outflow part of temperature control function part)
18 Karan (Karan spout)
20 Shower head (shower water discharge part)
20a shower hose 22 switching unit (switching unit)
24 Hot and cold water mixing channel (8th channel)
26 Switching valve (open / close valve)
28 Hot water temperature adjustment dial 30 Stop water switching handle 32 Intake drain valve body (intake drain valve)
34 Intake drain valve unit (intake drain valve)
36 Communication port, first inlet (first inlet)
38 Second inlet (second inlet)
40 3rd air inlet (3rd air intake part, 6th air intake part)
42 4th inlet (3rd intake part, 6th intake part)
44 5th inlet (5th inlet)
46 Sixth inlet (sixth inlet)
48 1st drainage port (1st drainage part, 3rd drainage part)
50 Second drainage port (first drainage part, fourth drainage part)
52 3rd drainage port (1st drainage part, 5th drainage part)
54 Fourth drain port (second drainage section)
56 Diaphragm valve body (intake drain valve)
58 Spring mounting hole 60 Coil spring 62 Holding member 62a Vent hole 64 Bolt 66 Valve chamber 66a Pressure chamber (back pressure chamber)
66b Communication room 68 Communication path (first intake part)
70 1st communication hole of valve body (communication part, communication hole)
72 Second communication hole (communication part) of valve body
74 Communication path (communication part, intake part)
76 Communication path (communication part, drainage part)
78 Communication passage (drainage)
80 communication passage (drainage)
81 Knob member for manual operation (manual operation part)
82 Communication path (second air intake)
84 communication path (3rd intake part, 6th intake part)
86 communication path (first drainage section, third drainage section)
88 communication path (3rd intake part, 7th intake part)
90 communication path (first drainage section, fourth drainage section)
92 communication path (first drainage section, fifth drainage section)
94 Flow path from the switching valve of the switching unit to Karan (fourth flow path)
96 communication path (fourth intake part)
98 Connection member (shower hose connection part)
100 Flow path from the switching valve of the switching unit to the shower head (fifth flow path)
102 communication path (fifth intake part)
104 Communication path (second drainage section)
A Intake drain valve unit mounting portion I Intake portion opened by the intake drain valve unit O Drain portion opened by the intake drain valve unit 200 Hot water / water mixing faucet device according to the second embodiment of the present invention 202 Operation handle 204 Spout 204a Spout Inner channel 206 Spout spout (spout unit)
208 Water faucet body 210 Water supply pipe 212 Hot water supply pipe 214 Air intake drain valve body 216 Air intake drain valve unit 218 Water passage 220 Water passage 222 Valve unit 224 Fixed valve body 224a Water passage 224b Fixed valve body water passage 224c Hot water mixing channel of fixed valve body 226 Movable valve body (open / close valve)
226a Mixing chamber of movable valve body (hot water mixing section, hot water mixing path)
228 Connection lever 230 Hot and cold water mixing path 232 First communication port (first communication part)
234 Second communication port (second communication part)
236 Third communication port (third communication part)
238 Drain outlet (drainage part)
240 Diaphragm type valve body 242 Spring mounting hole 244 Coil spring 246 Holding member 248 Bolt 250 Valve chamber 250a Pressure chamber (back pressure chamber)
250b Communication room 252 First communication path (first communication part)
254 Second communication path (second communication part)
256 Valve body communication hole (communication part)
258 Third communication path (third communication part)
260 Drain port (drainage)
262 Drainage channel (drainage section)
A1 Operation axis A2 Operation axis B Counter C Communication part that allows intake and drainage by the intake and drainage valve unit D Drainage part that allows intake and drainage by the intake and drainage valve unit θ Flow control operation angle φ Temperature control operation angle 300 Hot and cold water mixing apparatus according to the third embodiment of the present invention 308

Claims (12)

A hot and cold water mixing faucet device for discharging hot water mixed with hot water supplied from a hot water supply source and water supplied from a water supply source,
A faucet body provided with a hot and cold water mixing section in which hot water supplied from a hot water supply source and water supplied from a water supply source are mixed;
Provided in the faucet body, opened and closed by the water pressure upstream of the faucet body, and opened by a draining operation in which water supply from the water supply source to the faucet body is stopped. An intake / drain valve that performs intake and drainage,
The intake / drain valve is opened by the draining operation, and intake air is automatically supplied to the respective hot water and water flow paths upstream of the hot water / mixing section, and downstream of the hot water / mixing section. A hot-water / water-mixing faucet device comprising a single intake / drain valve configured to automatically perform intake or drainage with respect to a hot water flow path on the side. Furthermore, it has a pressure chamber into which water supplied from the water supply source to the faucet body flows, and the intake / drain valve is provided with a valve body that is provided in the pressure chamber and on which the water pressure in the pressure chamber acts, In the vicinity of the valve body of the valve body and the faucet body, there is provided a communication portion for communicating the pressure chamber and the outside of the water faucet body through the valve body. When water supply from the water supply source to the faucet body is stopped by operation to reduce the water pressure in the pressure chamber and open the valve body, air is sucked into the pressure chamber from the communication portion, the pressure chamber of the water mixing valve according to claim 1, wherein through the communicating portion is configured so as to discharge to the outside of the faucet body. The hot and cold water mixing faucet device according to claim 2 , wherein the valve body is a diaphragm type valve body that is opened and closed by water pressure in the pressure chamber. The communication portion includes a communication hole that is formed in the valve body and allows water supplied from the water supply source to the faucet body to pass through the pressure chamber, and the valve body passes through the communication hole and is mixing valve apparatus according to claim 2, opened and closed by the pressure of the water flowing into the pressure chamber. The hot and cold water mixing faucet device according to any one of claims 1 to 4 , further comprising a manual operation portion that is provided on the intake / drain valve and that can be manually operated. Furthermore, the hot water inflow part and the water inflow part into which hot water and water respectively flow from the upstream side of the hot water / water mixing part, and the amount of hot water and water flowing in from each of these hot water inflow part and water inflow part are adjusted. And a hot water outflow section for flowing out the temperature-controlled hot water by mixing, the temperature control function section from the hot water inflow section and the water inflow section toward the hot water outflow section. mixing valve apparatus according to any one of claims 1 to 5 is arranged inclined to the faucet body so as to be inclined downward Te. And a shower hose part provided at the tip of the shower head for discharging hot water mixed in the hot water mixing part, and a shower hose connection part for connecting the shower hose part and the faucet body. The water / water mixing faucet device according to any one of claims 1 to 6 , wherein the shower hose connection portion is located above a lowest position of a drainage portion that is opened and closed by the intake / drainage valve. A hot and cold water mixing faucet device for discharging hot water mixed with hot water supplied from a hot water supply source and water supplied from a water supply source,
A hot water passage through which hot water supplied from a hot water source passes, a water passage through which water supplied from a water supply source passes, and a hot water backflow prevention valve provided in the hot water passage to prevent back flow of hot water, A water backflow prevention valve that is provided in the water passage to prevent backflow of water, and is provided on the downstream side of the water backflow prevention valve and the water backflow prevention valve, and is supplied from the water passage. A faucet body provided with a temperature adjustment function unit that adjusts the temperature of hot water by adjusting and mixing the amount of hot water and the amount of water supplied from the water passage,
A currant water spouting unit that is provided on the downstream side of the faucet body and discharges hot water mixed by the temperature control function unit,
A shower water discharger provided on the downstream side of the faucet body, for discharging hot water mixed in the temperature control function unit;
Provided on the downstream side of the temperature control function part of the faucet body, and has an open / close valve for opening and closing a hot and cold water mixing path for supplying hot water to each of the curan water spouting part and the shower water spouting part. A switching unit capable of switching between water discharge and water stop, and water discharge and water stop from the shower water discharge unit,
An intake section provided in the faucet body, capable of sucking outside air by a draining operation in which water supply from the water supply source to the faucet body is stopped;
A drainage section provided in the faucet body, capable of draining residual water in the faucet body by the draining operation;
An intake / drain valve that opens and closes by the water pressure on the upstream side of the faucet body and is opened by the draining operation, enabling intake by the intake section and allowing drainage by the drain section. And
The intake section includes a first intake section provided in a first flow path, which is the water flow path upstream of the water backflow prevention valve, and the communication path upstream of the hot water backflow prevention valve. A second intake section provided in a second flow path that is a hot water passage, and a third flow path from each of the water backflow prevention valve and the hot water backflow prevention valve to the on-off valve. A third intake section, a fourth intake section provided in a fourth flow path from the on-off valve to the currant water discharge section, and a fifth flow path from the open / close valve to the shower discharge section. A fifth intake section,
The drainage section includes a first drainage section provided in the third flow path and a second drainage section provided in the fifth flow path. Faucet device. The third flow path includes a sixth flow path from the water backflow prevention valve to the temperature control function part, a seventh flow path from the hot water backflow prevention valve to the temperature control function part, An eighth flow path from the temperature control function part to the on-off valve,
The third intake section includes a sixth intake section provided in the sixth flow path, and a seventh intake section provided in the seventh flow path,
The first drainage part is provided in the third drainage part provided in the sixth channel, the fourth drainage part provided in the seventh channel, and the eighth channel. A hot water and water mixing faucet device according to claim 8 , further comprising a fifth drainage unit. A hot and cold water mixing faucet device for discharging hot water mixed with hot water supplied from a hot water supply source and water supplied from a water supply source,
A hot water passage through which hot water supplied from a hot water source passes, a water passage through which water supplied from a water supply source passes, hot water supplied from the hot water passage, and water supplied from the water passage are mixed. A faucet body comprising: a hot and cold mixing section; and a hot and cold mixing path through which hot water mixed in the hot and cold mixing section passes;
A water discharger that is provided on the downstream side of the faucet body and discharges hot water that has passed through the hot water and water mixing path;
It is provided in the faucet body and can switch water discharge and water stop from the water discharge section by opening and closing the water passage, the water passage and the hot water mixing passage, and the water passage and the water passage. An on-off valve that adjusts the amount of hot water and water flowing into the hot water mixing section from each of the above,
A communication part provided in the faucet body, and communicating with each of the water passage and the hot water passage upstream of the hot water mixing part and the hot water mixing path downstream of the hot water mixing part;
Provided in the pressure chamber formed in the communication portion, the communication portion is opened and closed by water pressure flowing into the pressure chamber from the upstream side of the faucet body, and water supply from the water supply source to the faucet body is stopped. An intake / drain valve that performs intake and drainage with respect to the faucet body.
The communication portion includes a first communication portion from the water passage to the intake / drain valve, a second communication portion from the hot water passage to the intake / drain valve, the hot water mixing passage and the intake / drain valve. A third communication part for communicating
In the vicinity of the intake / drain valve in the faucet body, a drainage part for draining hot water drained from the third communication part to the outside of the faucet body is provided to be openable / closable by the intake / drain valve, When the pressure of the water flowing into the pressure chamber of the communication portion from the water passage decreases due to the draining operation and the intake drain valve opens, the third communication portion and the drainage portion are opened from the water discharge portion. The water is sucked into the third communication part through the hot water mixing path, and the hot water in the hot water mixing path is drained from the drainage part to the outside of the faucet body through the third communication part. A hot and cold water mixing device. A hot and cold water mixing faucet device for discharging hot water mixed with hot water supplied from a hot water supply source and water supplied from a water supply source,
A hot water passage through which hot water supplied from a hot water source passes, a water passage through which water supplied from a water supply source passes, hot water supplied from the hot water passage, and water supplied from the water passage are mixed. A faucet body comprising: a hot and cold mixing section; and a hot and cold mixing path through which hot water mixed in the hot and cold mixing section passes;
A water discharger that is provided on the downstream side of the faucet body and discharges hot water that has passed through the hot water and water mixing path;
It is provided in the faucet body and can switch water discharge and water stop from the water discharge section by opening and closing the water passage, the water passage and the hot water mixing passage, and the water passage and the water passage. An on-off valve that adjusts the amount of hot water and water flowing into the hot water mixing section from each of the above,
A communication part provided in the faucet body, and communicating with each of the water passage and the hot water passage upstream of the hot water mixing part and the hot water mixing path downstream of the hot water mixing part;
Provided in the pressure chamber formed in the communication portion, the communication portion is opened and closed by water pressure flowing into the pressure chamber from the upstream side of the faucet body, and water supply from the water supply source to the faucet body is stopped. An intake / drain valve that performs intake and drainage with respect to the faucet body.
The communication portion includes a first communication portion from the water passage to the intake / drain valve, a second communication portion from the hot water passage to the intake / drain valve, the hot water mixing passage and the intake / drain valve. A third communication portion that communicates the water discharge portion, and when the water draining operation reduces the pressure of water flowing into the pressure chamber of the communication portion from the water flow path and opens the intake drain valve, the water discharge portion From the hot and cold water mixing passage, and through the third communication portion to the first communication portion and the second communication portion, respectively, and hot water in the hot and cold water mixing passage is Hot water mixing characterized by being drained from each of the first communication portion and the second communication portion to the water passage and the hot water passage through a third communication portion. Faucet device. Further, a drainage portion provided in the faucet body in the vicinity of the intake drainage valve so as to be opened and closed by the intake drainage valve and draining hot water drained from the third communication portion to the outside of the faucet body. The hot and cold water mixing device according to claim 11 .

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