JP6155524B2 - Mixer tap - Google Patents

Description

  The present invention relates to a mixing faucet.

  Conventionally, there is a hot water mixing valve for stably supplying hot water at a desired temperature set from the outside (see Patent Document 1 and the like). In this hot and cold water mixing valve, an input port through which water flows and an input port through which hot water flows are provided in a valve box for mixing hot water and water. The valve box is provided with a rotatable valve chamber, and the opening area of each input port is changed by the rotation of the valve chamber. The hot water / water mixing valve adjusts the flow rate of water and hot water flowing into the valve box by changing the opening area. By adjusting the flow rate, the hot water (water mixed with hot water) flows out of the valve box. ) Is adjusted to the desired temperature.

JP 2003-222253 A

  By the way, depending on an area and a residence form (a detached house, a low-rise floor, a high-rise floor, etc. of an apartment house), the water supply pressure may differ from the design value etc. of a mixing tap. In this case, the adjustment of only the channel cross-sectional area (the opening area) cannot cope with the difference in the water supply pressure (a water supply pressure different from the design value), and the water may be discharged at a water temperature deviated from a desired water temperature. In other words, in the hot water / water mixing valve, the temperature in a state where hot water and water are mixed may deviate from a desired water temperature due to the difference in the water supply pressure. Thus, in the conventional mixing faucet provided with the hot water mixing valve or the like, there is a problem that it is difficult to obtain hot water or water (hot water) at a desired water temperature by being affected by the difference in the water supply pressure in the region or the residence form. There is.

  The present invention has been made in view of the above circumstances, and provides a mixing faucet capable of discharging hot water at a desired water temperature while reducing the influence of a difference in water supply pressure associated with a region, a residence form, or the like. Is an issue.

  In order to solve the above-described problems, the present invention provides a first path through which hot water flows, a second path through which water flows, and a third path that discharges hot water from the first path and water from the second path. The first path and the second path are each provided with an on-off valve whose opening amount can be adjusted, and the third path has the hot water of the first path and the second path upstream of the third path. And a detection unit for detecting the temperature of the hot water in the third path on the downstream side of the mixing unit, and the opening / closing amount of the on-off valve according to the detection temperature of the detection unit And a control unit configured to perform feedback control for adjusting.

  Moreover, it is preferable that the said control part is comprised so that stop control which stops discharge of the hot water from the said 3rd path | route when the detected temperature from the said detection part is more than predetermined value.

  The stop control is performed when the third path is switched from the discharge stop state to the discharge state, and when the detected temperature becomes the predetermined value as the temperature rises during the hot water discharge, the third control is performed. It is preferable that the control is to continue the discharge from the path.

  In addition, an electrolytic cell configured to electrolyze hot water is provided in the third path, and the control unit discharges functional water in which the gas generated by the electrolysis is dissolved from the third path. In addition, it is preferable that the control is performed to lower the temperature of the hot water.

  In addition, an electrolytic cell configured to electrolyze hot water is provided in the third path, and the control unit discharges functional water in which gas generated by the electrolysis is precipitated as bubbles from the third path. When it does, it is preferable that it is comprised so that control which raises the temperature of the said hot water may be performed.

  Moreover, it is preferable that the detection unit for the feedback control is provided in the discharge unit of the third path.

  The present invention is provided with the above-described configuration to reduce the influence due to the difference in the water supply pressure associated with the area, the residence form, etc., and to make it easy to discharge hot water or water at a desired water temperature from the third path. Can do.

It is a composition schematic diagram of a first embodiment. It is a perspective view of a mixing part periphery same as the above. It is explanatory drawing of stop control. It is explanatory drawing of feedback control. It is a structure schematic diagram of 2nd embodiment. An electrolytic cell is shown, (a) is a front view, (b) is a BB sectional view, and (c) is a perspective view.

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

  The mixing faucet 1 according to the first embodiment of the present invention is provided above a water receiving portion such as a sink of a kitchen counter or a bowl of a washstand. As shown in FIG. 1 and FIG. 2, the mixing faucet 1 includes a first path 2 through which hot water flows in, a second path 3 through which water flows in, hot water in the first path 2 and second path 3. And a third path 4 for discharging water.

  The upstream side of the first path 2 is connected to an external hot water source (not shown), and this hot water source is, for example, a hot water heater. The first path 2 is connected to the third path 4 on the downstream side. For this reason, the first path 2 is a hot water supply path for supplying hot water from the hot water supply source to the third path 4.

  The first path 2 is provided with an on-off valve 11 (first valve 21). The first valve 21 is an on-off valve whose opening amount can be adjusted. In other words, the first valve 21 is configured to switch the water flow and the water stop of the first path 2 and adjust the flow rate from the first path 2 to the third path 4 during the water flow. The first valve 21 is formed by, for example, an electromagnetic valve. The electromagnetic valve includes, for example, a motor serving as a drive source and a valve body that opens and closes with an opening amount that can be adjusted by driving the motor.

  The upstream side of the second path 3 is connected to an external water supply source (not shown), and this water supply source is, for example, a water pipe. The downstream side of the second path 3 is connected to the third path 4. For this reason, the second path 3 is a water supply path for supplying water from the water supply source to the third path 4.

  The second path 3 is provided with an on-off valve 11 (second valve 31). The second valve 31 is an open / close valve whose opening amount is adjustable. In other words, the 2nd valve 31 is comprised so that the flow volume adjustment from the 2nd path | route 3 to the 3rd path | route 4 may be performed at the time of the water flow switching of the 2nd path | route 3 and water stoppage. The second valve 31 is formed by, for example, an electromagnetic valve. The electromagnetic valve includes, for example, a motor serving as a drive source and a valve body that opens and closes with an opening amount that can be adjusted by driving the motor.

  The 3rd path | route 4 has the mixing part 41 in the upstream. The first path 2 and the second path 3 are connected to the upstream side of the mixing unit 41. For this reason, the mixing part 41 can flow in hot water in the first path 2 and water in the second path 3. Then, when both hot water and water are supplied, the mixing unit 41 mixes them and flows them downstream.

  The 3rd path | route 4 has the discharge part 42 in the downstream. The discharge part 42 is arrange | positioned so that the said water receiving part may be faced. In other words, the discharge part 42 is provided with its discharge direction facing the water receiving part. For this reason, the discharge part 42 discharges the hot water (only hot water and only water are included) which flowed in from the mixing part 41 to the said water receiving part.

  In the third path 4, a water stop valve (third valve 43) is provided between the mixing unit 41 and the discharge unit 42. The third valve 43 is configured to switch between water flow and water stop of the third path 4. The third valve 43 is formed by, for example, an electromagnetic valve. This electromagnetic valve includes, for example, a motor serving as a drive source and a valve body that opens and closes by driving the motor.

  In addition, the mixed water tap 1 further includes an operation unit (not shown), a detection unit 45, and a control unit 5. The operation unit is configured so that a user can perform a discharge operation from the discharge unit 42 and a switching operation thereof (water discharge and water stop) and a change operation to a desired water temperature and discharge amount by the user. Is done. In other words, the user operates the operation unit to switch discharge and stop water from the discharge unit 42, change the setting of the temperature (water temperature) of hot water discharged from the discharge unit 42, or from the discharge unit 42. It is possible to change the setting of the flow rate (discharge amount) of hot water to be discharged.

  Moreover, the said operation part is comprised so that the operation (operation result) may be output to the control part 5, for example, and the control part 5 acquires the said operation result by this. Hereinafter, the water temperature set by the operation unit is a set water temperature, and the discharge amount set by the operation unit is a set flow rate.

  The detection part 45 is comprised so that the temperature (water temperature) of hot and cold water may be detected. The detection unit 45 is provided between the mixing unit 41 and the third valve 43 in the third path 4. For this reason, the detection unit 45 is configured to detect the water temperature downstream from the mixing unit 41. For example, the detection unit 45 is configured to output the detection result to the control unit 5, and the control unit 5 thereby acquires the detection result.

  The control unit 5 controls the opening / closing of each on-off valve 11 (including only one and both cases) according to the operation result of the operation unit, and when the detection unit 45 detects a high temperature (predetermined temperature). It is configured to perform stop control using the third valve 43.

  In the opening / closing control, the first valve 21 and the second valve 31 are opened with a predetermined opening amount (including cases where the opening amount is different for each opening / closing valve 11 or only one of them is opened) according to the operation result. Or closed (including the case where both are closed). The opening / closing control is a control for discharging hot water at a predetermined hot water / water mixing ratio or a predetermined amount of water from the third path 4 or stopping the discharge by the opening and closing.

  Further, in the opening / closing control, when the opening / closing valve 11 is opened, the corresponding opening / closing valve 11 is opened with an opening amount corresponding to the set value. This set value is a value (opening amount) set at the time of manufacture or the like corresponding to the set water temperature or the set flow rate in the operation result. In addition, the opening / closing control is a control for changing the opening amount of each opening / closing valve 11 (including only one case and both cases) according to the change operation (operation result) of the set water temperature and the set flow rate. Including.

  For this reason, when the operation unit is operated by a user, the mixing faucet 1 switches between discharge from the discharge unit 42 and its stop, changes the set water temperature at the time of discharge, It is configured to change the set flow rate at the time.

  In the stop control, when the discharge portion 42 is switched from the stop state (water stop state) to the discharge state (when discharge is started), if the water temperature in the third path 4 is equal to or higher than the predetermined temperature, the third valve 43 is The control is closed. Specifically, for example, when the mixing faucet 1 starts the discharge, if the detection result that is equal to or higher than the predetermined temperature is output from the detection unit 45 to the control unit 5, the stop faucet controls the third The third path 4 is closed by closing the valve 43. In other words, when the discharge is started, if the hot water in the third path 4 is equal to or higher than the predetermined temperature, the stop control closes the third path 4 to discharge hot water from the discharge unit 42. The control is prohibited.

  For this reason, the mixing faucet 1 can suppress discharge of high-temperature hot water (high-temperature water) when starting the discharge, and can cause a user's burns or thermal irritation (pain stimulation) due to high-temperature water. It can be made difficult to happen.

  The stop control is configured to be performed only when the discharge is started. In other words, as shown in FIG. 3, in the stop control, the water temperature of the third path 4 (solid line L2 in the figure) rises during discharge, and the water temperature falls below the predetermined temperature to the predetermined temperature (in the figure). In this case, the third valve 43 is not closed (does not function). In this way, the stop control is a control for maintaining the third valve 43 in the open state when operated to raise the set water temperature to the predetermined temperature or higher during discharge.

  By the way, the mixing faucet 1 is in a state where the mixing ratio of hot water is shifted from the mixing ratio (design value) at the time of design, for example, due to the difference in hot water or water supply pressure due to the difference in area, housing form, etc. The liquid may be discharged in a state (water temperature) deviated from the set water temperature. For this reason, in this example, the control unit 5 is configured to perform feedback control according to the detection result of the detection unit 45.

  In the feedback control, for example, after the opening control at the opening amount at which the set water temperature is reached, the opening amount of each on-off valve 11 (including both cases) according to the detection result of the detection unit 45. It is the control which adjusts (including closing).

  Hereinafter, for example, as shown in FIG. 4, the discharge water temperature (solid line L3 in the figure) is lower than the set water temperature (dotted line L4 in the figure) (for example, the water supply pressure in the second path 3 is designed to be high). The feedback control will be described by taking as an example a case where the flow rate of water is greater than the value.

  First, the mixing faucet 1 is controlled by the opening control so as to open each on-off valve 11 with a predetermined opening amount (installed value) as described above. And the mixing tap 1 is the structure which starts the said feedback control, when the water flow of the hot water in the said predetermined opening amount will be in the stable state. This stable state is, for example, a state in which the detected temperature (detection result from the detection unit 45) is substantially flat (for example, the first time point P1 in FIG. 4).

  The mixing faucet 1 increases the opening amount of the first valve 21 or the opening amount of the second valve 31 by the feedback control because the detected temperature is lower than the set water temperature at the first time point P1. It is controlled to make it smaller. As a result, the water temperature of the third passage 4 (the detected temperature) of the mixed faucet 1 rises.

  When the detected temperature that has risen exceeds the set water temperature, the mixing faucet 1 is controlled to reduce the opening amount of the first valve 21 or increase the opening amount of the second valve 31 by the feedback control. Is done. As a result, the detected temperature of the mixed faucet 1 is lowered. Further, the mixed faucet 1 is controlled to increase the opening amount of the first valve 21 or decrease the opening amount of the second valve 31 by the feedback control when the detected temperature lowered is lower than the set water temperature. Is done. As a result, the detected temperature of the mixed faucet 1 rises.

  Furthermore, the mixing faucet 1 may be controlled to adjust (change) the opening amounts of both the on-off valves 11 (both the first valve 21 and the second valve 31) by the feedback control. In this case, it is possible to make it difficult to change the flow rate of the third path 4 after the feedback control and before the feedback control.

  Thus, the mixing faucet 1 changes and adjusts the opening amount of each on-off valve 11 by the feedback control when the set water temperature is different from the temperature of the hot water mixed in the mixing unit 41 (the detected temperature). Thus, the detected temperature can be brought close to the set water temperature. In other words, the mixing faucet 1 can bring the detected temperature to a level state at the set water temperature (a state where the water temperature in the third path 4 is stable at the set water temperature) by the feedback control.

  For this reason, the mixing tap 1 can make it easy to discharge the hot water of the said setting water temperature from the 3rd path | route 4 (discharge part 42). Thereby, the mixing tap 1 can reduce the influence by the difference in the water supply pressure accompanying an area, a residence form, etc., and can discharge hot water at the water temperature (the set water temperature) desired by the user. The mixing faucet 1 can discharge hot water while maintaining a substantially constant flow rate by adjusting (changing) the opening amount of both the on-off valves 11. Thereby, the mixing faucet 1 can discharge hot water at the desired flow rate (the set flow rate) and at the set water temperature, for example, when a flow rate is desired by the operation unit.

  Further, the mixed faucet 1 is configured to use (use together) the same detection unit 45 in the stop control and the feedback control. In other words, the mixing faucet 1 is configured to use the stop control detection unit 45 used when starting the discharge for the feedback control during the discharge. For this reason, the mixing tap 1 can suppress the increase of a structural member and can perform the said feedback control with a simple structure.

  Next, a second embodiment will be described based on FIGS. In addition, the same code | symbol is attached | subjected to the structure which overlaps with above-mentioned 1st embodiment, the description which overlaps is abbreviate | omitted, and the characteristic etc. of this example (2nd embodiment) are demonstrated.

  As shown in FIG. 5, the mixed faucet 1 of the present example includes an electrolytic cell 6 between the third valve 43 and the discharge part 42 of the third path 4. For this reason, the electrolytic cell 6 has a configuration in which hot water in the third path 4 circulates.

  Specifically, for example, the electrolytic cell 6 has a box-shaped case 61 as shown in FIG. The case 61 includes a first connection part 63 that connects the internal space (inside the box) to the third valve 43 side of the third path 4 and a second connection part that connects the internal space to the discharge part 42 side of the third path 4. And a connecting portion 64. Therefore, in the electrolytic cell 6, the hot water on the third valve 43 side of the third path 4 flows into the internal space from the first connection part 63, and the hot water in this internal space flows from the second connection part 64 to the third path 4. It is the structure which flows out to the discharge part 42 side (downstream side). The second connection portion 64 is provided at a higher position than the first connection portion 63.

  Further, the electrolytic cell 6 includes at least two electrode members 65 and a power supply unit 66 that applies a voltage to each electrode member 65. The electrode member 65 is disposed in the internal space of the case 61. The electrode members 65 are arranged at a predetermined interval from each other. The electrode member 65 is formed in a plate shape, for example. And the electrode member 65 is arrange | positioned in the state which mutually faced the plate | board surface. The electrode member 65 includes an end portion for electrical connection with the power source portion 66, and this end portion protrudes from the internal space to the outside of the case 61.

  The power supply unit 66 is disposed outside the case 61. The power supply unit 66 is, for example, a DC power supply. The power supply unit 66 is electrically connected to the end portion of the electrode member 65 through a conductive member. The power supply unit 66 is configured to apply a voltage to the electrode member 65 such that one electrode member 65 serves as an anode and the other electrode member 65 serves as a cathode.

  The electrolytic cell 6 can electrolyze a part of the flowing hot water by applying the voltage to the electrode member 65. The electrolytic cell 6 is likely to generate oxygen bubbles on the anode side (on the electrode member 65 side serving as the anode) by this electrolysis. For this reason, the mixing tap 1 can discharge the hot water from the discharge part 42 as functional water containing oxygen. And the mixing faucet 1 makes it easy to flow the gas produced | generated by electrolysis to the downstream (discharge part 42 side) by providing the 2nd connection part 64 upwards compared with the 1st connection part 63. be able to. In addition, the mixing faucet 1 may be provided with an input portion for adding an additive between the third valve 43 and the electrolytic cell 6, and the electrolysis of hot water may be promoted by the addition of the additive.

  As the operation (mode) for discharging the functional water, the mixing faucet 1 discharges the first functional water in which oxygen is dissolved and the second mode in which oxygen is precipitated as bubbles. 2 modes. Each mode is selected by the user by operating an operation unit (not shown). And control by the control part 5 is performed so that the mixing tap 1 may discharge the functional water according to the selected mode.

  Specifically, for example, when the first mode is selected, the control unit 5 increases the opening amount of the first valve 21 or decreases the opening amount of the second valve 31 to reduce the third path 4. Control is performed to increase the water temperature. And the hot water of the electrolytic cell 6 becomes easy to melt | dissolve oxygen by the raise of this water temperature. In other words, the hot water in the electrolytic cell 6 is difficult to precipitate oxygen due to the increase in the water temperature.

  For this reason, the mixing faucet 1 is in a state in which the water temperature is raised, so that oxygen generated by electrolysis in the electrolytic cell 6 is dissolved in the hot water, for example, as it flows downstream. Can be made easier. In other words, the bubbles of oxygen in the hot water can increase the temperature of the hot water (water temperature), for example, and the particle diameter of the bubbles can easily be reduced as it flows downstream. Thereby, the mixing faucet 1 can discharge the 1st functional water (high concentration oxygen water) which dissolved oxygen.

  For example, when the second mode is selected, the controller 5 decreases the water temperature of the third path 4 by decreasing the opening amount of the first valve 21 or increasing the opening amount of the second valve 31. Control is performed. And the hot water of the electrolytic cell 6 becomes difficult to melt | dissolve oxygen by the fall of this water temperature. In other words, the hot water in the electrolytic cell 6 is liable to deposit oxygen due to the decrease in the water temperature.

  For this reason, the mixing faucet 1 is in a state in which the water temperature is lowered, so that oxygen generated by electrolysis in the electrolytic cell 6 flows into the hot water as bubbles, for example, as it flows downstream. Precipitation can be facilitated. In other words, the bubbles of oxygen in the hot water can be made easier to increase the particle size of the bubbles as it flows downstream, for example, by lowering its water temperature. Thereby, the mixing faucet 1 can discharge the second functional water (bubble mixed water) in which oxygen is precipitated as bubbles.

  In addition, the mixing faucet 1 includes a detection unit 45 (second detection unit 47) in the discharge unit 42 in addition to the detection unit 45 (first detection unit 46) for stop control. The second detection unit 47 is configured to detect the water temperature of the discharge unit 42 (temperature of hot water immediately before being discharged from the discharge unit 42). The control unit 5 is configured to perform the feedback control using the detection result of the second detection unit 47. Specifically, the feedback control of the present example is performed, for example, after the opening control with the opening amount at which the set water temperature is reached, according to the detection result of the second detection unit 47 (both in the case of only one or both) (Including the case of (1)) is controlled (including closing).

  For this reason, the mixing faucet 1 is lower than the set water temperature from the discharge unit 42 when the water temperature may decrease from the first detection unit 46 to the discharge unit 42, for example, when used in a low temperature environment. Discharge of hot water at a water temperature can be suppressed. In other words, the mixing faucet 1 can reduce the influence of a decrease in the water temperature in the third path 4, and can easily discharge hot water having the set water temperature from the discharge unit 42. Thereby, the mixing faucet 1 can reduce the influence by the difference in the water supply pressure accompanying a region, a residence form, etc., and can make it easy to discharge hot water with the water temperature which a user desires.

  The present invention is not limited to the above-described configuration, and can be implemented with appropriate modifications within a range not departing from the gist.

DESCRIPTION OF SYMBOLS 1 Mixed faucet 11 On-off valve 2 1st path | route 21 1st valve 3 2nd path | route 31 2nd valve 4 3rd path | route 41 Mixing part 42 Discharge part 43 3rd valve 45 Detection part 46 1st detection part 47 2nd detection part 5 Control unit 6 Electrolyzer

Claims (4)

A first path through which hot water flows,
A second path through which water flows,
A third path for discharging the hot water of the first path and the water of the second path,
Each of the first path and the second path is provided with an opening / closing valve whose opening amount is adjustable,
The third path includes a mixing unit that mixes the hot water of the first path and the water of the second path on the upstream side thereof,
A detection unit for detecting the temperature of the hot water in the third path is provided on the downstream side of the mixing unit,
A control unit configured to perform feedback control for adjusting an opening amount of the on-off valve according to a detection temperature of the detection unit ;
The control unit is configured to perform stop control when the third path is switched from the discharge stop state to the discharge state,
The stop control is
Discharge of hot water from the third path is stopped when the detected temperature from the detection unit is equal to or higher than a predetermined value, but the detected temperature is less than the predetermined value immediately after switching from the discharge stopped state to the discharge state. Further, when the temperature becomes higher than the predetermined value as the temperature rises during discharge of the hot water, the discharge from the third path is continued . An electrolytic cell configured to electrolyze hot water is provided in the third path,
The control unit is configured to perform control to lower the temperature of the hot water when discharging the functional water in which the gas generated by the electrolysis is dissolved from the third path.
The mixing faucet according to claim 1 . A first path through which hot water flows,
A second path through which water flows,
A third path for discharging the hot water of the first path and the water of the second path,
Each of the first path and the second path is provided with an opening / closing valve whose opening amount is adjustable,
The third path includes a mixing unit that mixes the hot water of the first path and the water of the second path on the upstream side thereof,
A detection unit for detecting the temperature of the hot water in the third path is provided on the downstream side of the mixing unit,
A control unit configured to perform feedback control for adjusting an opening amount of the on-off valve according to a detection temperature of the detection unit;
An electrolytic cell configured to electrolyze hot water is provided in the third path,
The said control part is comprised so that the temperature of the said hot water may be raised when the functional water which precipitated the gas produced | generated by the said electrolysis as a bubble is discharged from the said 3rd path | route.
A mixing faucet characterized by that . The mixing faucet according to any one of claims 1 to 3, wherein the detection unit for the feedback control is provided in the discharge unit of the third path .

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