JP6376331B2 - Hot water mixing device - Google Patents

Description

  The present invention relates to a hot and cold mixing device, and more particularly, to a hot and cold mixing device that individually controls opening and closing of a water supply channel and a hot water supply channel.

Hot and cold mixing devices are widely used in kitchens and bathroom showers, and various methods have been proposed for temperature control and flow rate control. Conventionally, as shown in Patent Document 1, a method has been proposed in which hot water and water are first mixed by a mixing valve, and the flow rate after mixing is controlled by an on-off valve. A hot and cold water mixing apparatus using such a technique can be realized with a mechanical configuration, and thus has been widely used. On the other hand, in order to mix hot water with the mixing valve, it is necessary to provide a check valve for preventing a backflow from the mixing valve in each of the water supply channel and the hot water supply channel connected to the mixing valve.
In addition to this, for example, there has been proposed a hot water and water mixing device based on a method of individually opening and closing a water supply channel and a hot water supply channel as shown in Patent Document 2. In the hot and cold water mixing apparatus based on such a method, a configuration of electronic control is required to control opening and closing of the water supply channel and the hot water supply channel individually for temperature control and flow rate control, but a check valve or the like is added. This is advantageous in that it is not necessary.

Japanese Patent Laid-Open No. 6-42674 JP 2013-76486 A

  In a conventional hot and cold water mixing device using a method for individually opening and closing a water supply channel and a hot water supply channel, temperature control and flow rate control are performed by a control method including flow rate feedback, so the differential pressure between hot water and water, When the pressure suddenly fluctuates, hunting or overshooting occurs even if it tries to cope with this fluctuation, and it is difficult to perform control sufficiently corresponding to the sudden fluctuation. That is, it is relatively difficult to perform stable temperature control and flow rate control in the conventional hot water / water mixing device using the method of individually opening and closing the water supply channel and the hot water supply channel.

  Then, this invention was made | formed in order to solve the problem mentioned above, and it aims at providing the hot-water mixing apparatus which can perform temperature control and flow control stably.

In order to achieve the above object, the present invention provides a water temperature sensor provided on a water supply channel that supplies water toward the water discharge unit, a water-side flow rate adjustment unit that adjusts the water flow rate of the water supply channel, and a water discharge unit. A hot water temperature sensor provided on a hot water supply path for supplying hot water toward the hot water supply flow path, a hot water flow rate adjustment unit for adjusting the hot water flow rate of the hot water supply path, and a control unit for operating the water side flow rate adjustment unit and the hot water flow rate adjustment unit And adjusting the water discharge temperature and the water discharge flow rate in the water discharge unit by adjusting the water flow rate and the hot water flow rate by the water side flow rate adjustment unit and the hot water side flow rate adjustment unit under the control of the control unit. In the mixing faucet device, the water-side flow rate adjustment unit and the hot water-side flow rate adjustment unit each include a constant flow valve having a predetermined flow rate flowing into the downstream side, and the constant flow valve is the control The set flow rate, the water-side flow rate adjustment unit and the hot water side flow rate adjustment units each have a flow sensor, the flow rate of the constant flow valve flow rate detected by the flow rate sensor is set by the control unit If not, the control unit maintains the flow rate ratio of each constant flow valve set by the control unit, and the flow rate of each constant flow valve is higher than the flow rate detected by each flow sensor. It is characterized by being made smaller .
In the present invention configured as described above, it is possible to perform stable temperature control and flow rate control even after being subjected to disturbance of pressure and temperature, and in such a state that the flow rate is largely regulated by a water discharge unit or the like. Even when the water pressure and the hot water pressure are low, temperature control and flow rate control can be performed appropriately .

In this invention, Preferably, the said constant flow valve is between the primary side flow path and secondary side flow path of the said water supply path, and between the primary side flow path and secondary side flow path of the said hot water supply path. Valves to be installed, respectively, an intermediate flow path connecting the primary flow path and the secondary flow path, a motor, and the motor operated by the motor, the primary flow path and the intermediate flow path A flow restrictor that adjusts the flow rate of water by changing the area of the flow path formed between the diaphragm and a diaphragm valve mechanism that adjusts the degree of opening of the communicating part that leads from the intermediate flow path to the secondary flow path And the diaphragm valve mechanism includes a first pressure chamber communicating with the primary flow path, a second pressure chamber communicating with the intermediate flow path, the first pressure chamber, and the second pressure chamber. Are connected to the diaphragm, and from the intermediate flow path to the secondary flow path. A main valve for adjusting the opening of the communicating portion that, the connected said main valve to said diaphragm portion, and a biasing means for biasing to said first pressure chamber side.
In the present invention configured as described above, the flow rate can be stably controlled even when pressure fluctuations are received.

In the present invention, preferably, the constant flow valve is configured such that when each of the flow restrictors closes between the primary flow path and the intermediate flow path, the primary flow path and the first pressure are also combined. Block communication with the room.
In the present invention configured as described above, in the water stop state, the pressures of the first pressure chamber and the second pressure chamber sandwiching the diaphragm portion of the diaphragm valve mechanism are equal, that is, both surfaces of the diaphragm portion are the same pressure. Therefore, the differential pressure does not act on the diaphragm portion in the water stop state, and the long-term reliability of the diaphragm valve mechanism can be ensured.

In the present invention, preferably, the constant flow valve is a valve installed between a primary side flow path and a secondary side flow path, and the primary side flow path and the secondary side flow path, respectively, The instantaneous flow rate of the flowing water is adjusted by changing the area of the flow path formed between the intermediate flow path and the secondary flow path. And a diaphragm valve mechanism that adjusts an opening degree of a communication portion that communicates from the primary side flow path to the intermediate flow path, and the diaphragm valve mechanism communicates with the intermediate flow path. A first pressure chamber, a second pressure chamber communicating with the secondary side flow path, a diaphragm section separating the first pressure chamber and the second pressure chamber, and the primary flow path connected to the diaphragm section. From the main valve that adjusts the opening degree of the communication portion leading to the intermediate flow path, The connected the main valve Iyafuramu portion has a biasing means for biasing to said first pressure chamber side.
In the present invention configured as described above, the flow rate can be stably controlled even when pressure fluctuations are received.

In the present invention, preferably, the constant flow valve is configured such that when each of the flow restrictors closes between the intermediate flow path and the secondary flow path, the secondary flow path and the second flow path valve are also combined. Block communication between the two pressure chambers.
In the present invention configured as described above, in the water stop state, the pressures of the first pressure chamber and the second pressure chamber sandwiching the diaphragm portion of the diaphragm valve mechanism are equal, that is, both surfaces of the diaphragm portion are the same pressure. Therefore, the differential pressure does not act on the diaphragm portion in the water stop state, and the long-term reliability of the diaphragm valve mechanism can be ensured.

In this invention, Preferably, when the said control part changes the setting of the flow volume of each said constant flow valve which the said water side flow rate adjustment unit and the said hot water side flow rate adjustment unit have, the constant flow valve of the said water side flow rate adjustment unit The ratio of the driving speed of the motor and the driving speed of the motor of the constant flow valve of the hot water flow rate adjustment unit is the drive angle of the flow restrictor of the constant flow valve of the water flow rate adjustment unit, This coincides with the ratio of the constant flow valve of the hot water flow adjustment unit to the drive angle of the flow restrictor.
In the present invention configured as described above, when the setting of the flow rate is changed, the adjustment in the water side flow rate adjustment unit and the adjustment in the hot water side water amount adjustment unit are completed at the same time. Can be suppressed.

In the present invention, preferably, the water discharge portion is provided in a faucet device, the water side flow rate adjustment unit and the hot water side flow rate adjustment unit are provided outside the faucet device, and the water side flow rate adjustment unit and The water and hot water whose flow rates are adjusted by the hot water flow rate adjusting unit are mixed in the faucet device.
In this invention comprised in this way, the time lag at the time of the temperature change in a water discharging part can be decreased, and a pressure | voltage resistant part can be decreased and a pressure | voltage resistant reliability can be improved.

In the present invention, preferably, the hot water temperature sensor and the water temperature sensor are provided in the faucet device.
In the present invention configured as described above, temperature control can be performed more appropriately even when a temperature difference occurs between each flow rate adjustment unit and the water faucet device due to cooling of the piping or the like.

  According to the hot and cold water mixing apparatus of the present invention, stable temperature control and flow rate control can be performed.

It is a block diagram which shows roughly the structure of the hot water mixing apparatus which concerns on each embodiment of this invention. It is side surface sectional drawing which shows the structure of the constant flow valve used for the hot water mixing apparatus which concerns on 1st embodiment of this invention, and its peripheral part. It is a flowchart figure which shows the control processing of the hot water mixing apparatus which concerns on 1st embodiment of this invention. It is side surface sectional drawing which shows the structure of the constant flow valve used for the hot-water mixing apparatus which concerns on 2nd embodiment of this invention, and its peripheral part. It is a flowchart figure which shows the control processing of the hot water mixing apparatus which concerns on 2nd embodiment of this invention. It is side surface sectional drawing which shows the other structure of the constant flow valve which can be used for the hot water mixing apparatus of this invention.

Next, a hot and cold water mixing apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a block diagram schematically showing a configuration of a hot and cold mixing apparatus 1 according to each embodiment of the present invention. Each configuration is indicated by a block, a control system is indicated by a broken line, and a water and hot water supply system is indicated by a solid line.

The water supply source 10 is a water supply, a tank, or the like, and supplies water to the water heater 14 or the water-side flow rate adjustment unit 20 via the first water supply path 12. The water heater 14 is a hot water supply device such as a boiler, and heats water supplied via the first water supply path 12 and supplies hot water to the hot water flow rate adjustment unit 30 via the first hot water supply path 16. Since the water pressure of the water supplied to the 1st water supply path 12 and the 1st hot water supply path 16 and a hot water is comparatively high, it is preferable that these 1st water supply paths 14 and the 1st hot water supply path 16 are made into a pressure | voltage resistant structure.
The water whose flow rate is adjusted by the water-side flow rate adjusting unit 20 is further sent to the faucet device 18 through the second water supply channel 13. Similarly, the hot water whose flow rate is adjusted by the hot water flow rate adjusting unit 30 is further sent to the faucet device 18 via the second hot water supply path 17. These water and hot water are mixed inside the faucet device 18. The mixed hot water is discharged from a water discharge unit 19 provided in the faucet device 18. The user of the faucet device 18 operates the faucet device 18 and inputs his / her wishes regarding the temperature and flow rate (water discharge amount) of hot water discharged from the water discharge unit 19. When information on the temperature and flow rate of hot water desired by the user is input to the faucet device 18, this information is transmitted to the control unit 40. Subsequently, the control unit 40 performs a control process to be described later with reference to FIGS. 3 and 5 to control the water flow rate adjustment unit 20 and the hot water flow rate adjustment unit 30 to control the flow rate of water and the flow rate of hot water, respectively. To do. As a result, the water whose flow rate has been adjusted by the water-side flow rate adjustment unit 20 and the hot water whose flow rate has been adjusted by the hot water-side water amount adjustment unit 30 are mixed in the faucet device 18, and the temperature and flow rate desired by the user are mixed. Then, water is discharged from the water discharge unit 19. If it does in this way, since mixing is performed in the faucet device 18 which is a terminal, there exists an advantage that the time lag at the time of the temperature change in the water discharging part 19 can be decreased.
In addition, various shower heads (water saving shower heads) and the like can be connected to the water discharger 19. In addition, when passing through the water-side flow rate adjustment unit 20 and the hot water-side flow rate adjustment unit 30, the water pressure and the hot water pressure are reduced, so the second water supply path 13, the second hot water supply path 17, the faucet device It is not necessary to make 18 etc. into a pressure | voltage resistant structure equivalent to the 1st water supply path 12 and the 1st hot water supply path 16. While reducing the withstand voltage portion, the withstand voltage reliability can be improved.
The above-described water-side flow rate adjustment unit 20, hot water-side flow rate adjustment unit 30, second water supply passage 13, second hot water supply passage 17, faucet device 18, and water discharge portion 19 are provided as a set, and a plurality of these configurations are provided. Alternatively, concentrated hot water supply may be performed. (Only one set is shown in FIG. 2, but it can be provided in the same way at the extension / branch destination of the first water supply path 12 and the first hot water supply path 16).

The control unit 40 is a processing device that executes a series of control processes to be described later with reference to FIGS. 3 and 5. In each embodiment of the present invention, a microprocessor or the like can be used as the control unit 40. The control unit 40 includes temperature sensors 105, 105 ′ and flow rate sensors 107, 107 ′ provided in the above-described water heater 14, faucet device 18, water side flow rate adjustment unit 20 and hot water side flow rate adjustment unit 30, respectively. These are electrically connected to the motors 203 and 203 ′ of the constant flow valves 200 and 200 ′, and exchange data and instructions. The connection between the control unit 40 and each element of the hot and cold water mixing device 1 may be a wired connection or a wireless connection.
Specifically, it receives an instruction from the user via the faucet device 18 and values detected by temperature sensors 105 and 105 ′ and flow rate sensors 107 and 107 ′ described later, and performs control processing. Further, in order to respond to instructions from the user and to fluctuations in the temperature and flow rate of water and hot water accompanying changes in the external environment, the water side flow rate adjustment unit 20 and the hot water side flow rate adjustment unit 30 are respectively provided. Send instructions to change the flow rate appropriately. In addition to this, the temperature of the water heater 14 can be set. These functions are provided by software, firmware, or the like.
In addition, in order to operate the hot and cold mixing apparatus 1 having such a configuration, a power supply (not shown) that supplies power to the hot and cold mixing apparatus 1 is connected. As this power source, a commercial power source is usually used, but a battery may be used in combination for power failure.

Next, referring to FIG. 2, constant flow valves 200, 200 ′ and respectively used for the water side flow rate adjustment unit 20 and the hot water side flow rate adjustment unit 30 of the hot water mixing apparatus of the first embodiment of the present invention. The peripheral structure and the operation of the constant flow valves 200 and 200 ′ will be described.
FIG. 2 is a side cross-sectional view of constant flow valves 200 and 200 ′ and their peripheral parts used for the water-side flow rate adjustment unit 20 and the hot-water flow rate adjustment unit 30 of the hot and cold water mixing apparatus according to the first embodiment of the present invention. FIG. The constant flow valve 200 used in the water-side flow rate adjustment unit 20 is disposed between the first water supply channel 12 and the second water supply channel 13. Similarly, the constant flow valve 200 ′ used in the hot water flow rate adjustment unit 30 is disposed between the first hot water supply path 16 and the second hot water supply path 17. Since the constant flow valve 200 used for the water side flow rate adjustment unit 20 and the constant flow valve 200 ′ used for the hot water side flow rate adjustment unit 30 have the same structure, they will be used for the water side flow rate adjustment unit 20 hereinafter. The constant flow valve 200 that is used will be described as an example.

  As shown in FIG. 2, the constant flow valve 200 is installed so as to connect the primary side flow path 101 (that is, the first water supply path 12) and the secondary side flow path 103 (that is, the second water supply path 13). . An intermediate flow path 201 is provided in the constant flow valve 200, a flow restrictor 202 is provided between the primary flow path 101 and the intermediate flow path 201, and the intermediate flow path 201 and the secondary flow path 103 are provided. The main valve 208 of the diaphragm valve mechanism 204 is provided at the communication portion between the main valve 208 and the diaphragm valve mechanism 204. In FIG. 2, several curved arrows heading from the primary side channel 101 to the secondary side channel 103 through the intermediate channel 201 indicate the flow of water, and the primary side channel 101 and the intermediate channel 201. Reference numerals P1, P2, and P3 described in a plurality of locations in the first pressure chamber 205, the second pressure chamber 206, and the secondary side flow path 103 described later indicate the water pressure at each position. When the same code | symbol is attached | subjected, the water pressure in each position is the same. (For example, the water pressure in the intermediate flow path 201 and the water pressure in the second pressure chamber 206 are the same “P2”.)

  The flow restrictor 202 is a valve for adjusting the flow rate of water passing therethrough by changing the flow channel area formed between the primary flow channel 101 and the intermediate flow channel 201. The flow restrictor 202 is mechanically connected to the motor 203 and moves up and down in accordance with the rotation of the motor 203. As a result, the flow area formed between the primary flow path 101 and the intermediate flow path 201 Changes. If the flow path area increases, the flow rate of water passing through the flow restrictor 202 increases, and if the flow path area decreases, the flow rate of water passing through the flow restrictor 202 decreases. The flow rate of water controlled by the flow restrictor 202 is a function of the rotation angle of the motor 203 (corresponding to the position of the flow restrictor 202).

The diaphragm valve mechanism 204 includes a first pressure chamber 205, a second pressure chamber 206, a diaphragm portion 207 that partitions the first pressure chamber 205 and the second pressure chamber 206, and a main valve 208 connected to the diaphragm portion 207, A spring 209 is provided. The first pressure chamber 205 communicates with the primary flow path 101 through the first series passage 210. The second pressure chamber 206 communicates with the intermediate flow path 201 through the second communication path 211. The diaphragm portion 207 is a diaphragm that partitions the first pressure chamber 205 and the second pressure chamber 206, and is biased from the second pressure chamber 206 side to the first pressure chamber 205 side by a spring 209 that is a biasing means. The spring 209 is an urging means that is provided in the second pressure chamber 206 and urges the diaphragm portion 207 toward the first pressure chamber 205. The main valve 208 of the diaphragm valve mechanism 204 is a valve for adjusting the opening degree of the communication portion that communicates from the intermediate flow path 201 to the secondary flow path 103. The main valve 208 is connected to the diaphragm unit 207.
The diaphragm valve mechanism 204 pushes up and down the diaphragm portion 207 by the pressure difference between the first pressure chamber 205 and the second pressure chamber 206 and the force of the spring 209. The movement of the diaphragm portion 207 moves the main valve 208 up and down, and the opening degree of the communication portion that leads from the intermediate flow path 201 to the secondary flow path 103 is adjusted.

  A temperature sensor 105 is provided in the peripheral portion of the constant flow valve 200 and the secondary side flow path 103. This temperature sensor 105 is a water temperature sensor for detecting the temperature (water temperature) of the water flowing through the secondary side flow path 103 and transmitting it to the control unit 40. (In the constant flow valve 200 ′ provided in the hot water flow rate adjustment unit 30, the temperature sensor 105 ′ detects the temperature (hot water temperature) of hot water flowing through the secondary side flow path and transmits it to the control unit 40. Hot water temperature sensor.)

The operation principle of the constant flow valve 200 having such a configuration will be described with reference to FIG. As shown in FIG. 2, the pressure in the primary channel 101 is P1, the pressure in the intermediate channel 201 is P2, and the pressure in the secondary channel 103 is P3. The area of the diaphragm portion 207 is S, the force of the spring 209 is F, and the (instantaneous) flow rate of the constant flow valve 200 is Q.
As described above, since the first pressure chamber 205 of the diaphragm valve mechanism 204 communicates with the primary side flow path 101 through the first series passage 210, the pressure in the first pressure chamber 205 is the same as the primary side flow path P1. It becomes. Further, since the second pressure chamber 206 of the diaphragm valve mechanism 204 communicates with the intermediate flow path 201 through the second communication path 211, the pressure in the second pressure chamber 206 becomes the same P 2 as that of the intermediate flow path 201. Here, from the balance of the diaphragm valve mechanism 204,
P1 * S = P2 * S + F
Is obtained. If this equation is transformed,
P1-P2 = F / S
It becomes. On the other hand, in the flow restrictor 202, it is known that the flow rate Q is proportional to the 1/2 power of the pressure difference. If the constant that depends only on the opening of the flow restrictor 202 is C,
Q = C × (P1-P2) ^1/2 = C × (F / S) ^1/2
It becomes.
Accordingly, when the force F of the spring 209 is considered to be substantially constant, the area of the diaphragm portion 207 is constant, and thus the flow rate Q is constant regardless of the water pressure. In other words, even if there is a disturbance such as a change in the water pressure in the primary flow path 101, the flow rate Q is also constant if the opening amount of the flow restrictor 202 is constant.

As an example, let us consider a case where a disturbance such as an increase in the pressure P1 in the primary channel 103 occurs. When the pressure P1 in the primary channel 103 increases, the pressure P1 in the first pressure chamber 205 of the diaphragm valve mechanism 204 communicated with the primary channel 103 through the first series passage 210 also increases. Thereby, as the force applied to the diaphragm portion 207, the force due to the pressure P1 in the first pressure chamber 205 becomes larger than the resultant force of the pressure P2 in the second pressure chamber 206 and the force F of the spring 209, and as a result, the diaphragm The part 207 is pushed down.
When the diaphragm part 207 is pushed down, the main valve 208 connected to the diaphragm part 207 is also pushed down and moves in a direction to close the communicating part of the intermediate flow path 201 and the secondary flow path 103. As a result, the pressure P2 in the intermediate flow path 201 increases.
Then, the pressure P2 in the second pressure chamber 206 of the diaphragm valve mechanism 204 communicated with the intermediate flow path 201 and the second communication path 211 also increases. Finally, the forces applied to the diaphragm portion 207 are balanced.
On the other hand, when a disturbance that lowers the pressure P1 in the primary flow path 103 occurs, the diaphragm portion 207 is pushed up, and as a result, the pressure P2 in the second pressure chamber 206 decreases, Thus, the forces applied to the diaphragm portion 207 are balanced.
Thus, even when a disturbance such that the pressure P1 in the primary side flow path 103 fluctuates occurs, the diaphragm valve mechanism 204 of the constant flow valve 200 autonomously recovers the balance of the diaphragm portion 207, and as a result, It becomes possible to keep the flow rate constant. By using such a constant flow valve 200, stable flow rate control of the hot and cold water mixing device is possible.

The constant flow valve 200 used in the present embodiment stops water by rotating the flow restrictor 202 by the motor 203, that is, when closing between the primary flow path 101 and the intermediate flow path 201. At the same time, the flow restrictor 202 also closes the opening of the first series passage 210 that communicates the primary side flow path 101 and the first pressure chamber 205 of the diaphragm valve mechanism 204, and the primary side flow path 101 and the first pressure chamber. The communication with 205 is cut off.
When the communication between the primary side flow path 101 and the first pressure chamber 205 is blocked in this way, water is sealed in the first pressure chamber 205 in a water-stopped state, while the intermediate flow path 201 and the secondary flow path Outside air flows into the side channel 103. Since the water sealed in the first pressure chamber 205 can be handled as an incompressible liquid, the pressure applied to both surfaces of the diaphragm portion 207 is equal to the atmospheric pressure. Accordingly, since there is no differential pressure on both surfaces of the diaphragm portion 207 in the water-stopped state, water pressure does not act on the diaphragm portion 207 even when the constant flow valve 200 is closed, and long-term reliability of the diaphragm valve mechanism 204 can be ensured.

Next, with reference to the flowchart shown in FIG. 3, the control process of the hot and cold water mixing apparatus according to the first embodiment of the present invention will be described in detail. FIG. 3 is a flowchart showing a series of flows after the hot water mixing apparatus according to the first embodiment of the present invention is turned on.
First, the user of the hot and cold mixing device 1 turns on the power of the hot and cold mixing device 1 using a switch or the like (not shown) (step S101). Subsequently, the control unit 40 of the hot water / water mixing device 1 continues to adjust the initial position θc0 of the motor 203 of the constant flow valve 200 (that is, the initial position of the flow restrictor 202) provided in the water side flow rate adjustment unit 20 and the hot water side flow rate adjustment. An initial position θh0 of the motor 203 ′ of the constant flow valve 200 ′ provided in the unit 30 (that is, an initial position of the flow restrictor 202 ′) is acquired (step S102). The hot-water mixing device 1 is in a water-stopped state as an initial state. The user inputs the temperature and the amount of water discharged from the water discharger 19 of the water faucet device 18 by an input means (not shown) provided in the water faucet device 18, and the controller controls the desired temperature and water discharge amount of the hot water. 40 is acquired as the set temperature Tm and the set water discharge amount Qm (step S103).
Next, a temperature sensor (water temperature sensor) 105 provided in the water side flow rate adjustment unit 20 detects the water temperature Tc, and a temperature sensor (hot water temperature sensor) 105 ′ provided in the hot water side flow rate adjustment unit 30 is detected by the hot water temperature Th. And the control unit 40 acquires these pieces of information (step S104).
Based on these pieces of information, the control unit 40 calculates a water amount Qc (target) and a hot water amount Qh (target) to be supplied to the faucet device 18 (step S105). These water quantity Qc and hot water quantity Qh are calculated based on the following equations.
Qc (target) = ((Th−Tm) / (Th−Tc)) × Qm
Qh (target) = ((Tm−Tc) / (Th−Tc)) × Qm
When the value of the hot water temperature Th detected by the temperature sensor 105 ′ in the initial state is as low as the water temperature Tc, the temperature setting value of the hot water supplied by the hot water supply unit 14 can be used instead. Alternatively, when the calculation result is Qc (target) <0, Qc (target) = 0, and when Qh (target)> Qm, it is replaced with Qh (target) = Qm.

In this way, the control unit 40 adjusts the water amount Qc (target) and the hot water amount Qh (target) obtained by the calculation of the control unit 40, so that the control unit 40 has a motor 203 for the constant flow valve 200 provided in the water-side flow rate adjustment unit 20. Θc (target) corresponding to the movement target angle (corresponding to the target position of the flow restrictor 202), and the movement target angle (flow restrictor 202 of the motor 203 ′ of the constant flow valve 200 ′ provided in the hot water flow rate adjusting unit 30). Θh (target) corresponding to the target position of 'is acquired (step S106).
As described above, the flow rates of water and hot water controlled by the flow restrictors 202 and 202 ′ of the constant flow valves 200 and 200 ′ are functions of the rotation angles of the motors 203 and 203 ′, respectively. The relationship between the rotation angle of the motors 203 and 203 ′ of the constant flow valves 200 and 200 ′ and the flow rates of water and hot water is obtained in advance, and the control unit 40 holds this relationship as a mathematical expression or a table. Based on this relationship, the control unit 40 can obtain θc (target) and θh (target). In the present embodiment, constant flow valves 200, 200 ′ are used in which the rotation angles of the motors 203, 203 ′ of the constant flow valves 200, 200 ′ and the flow rates of water and hot water are in a substantially linear relationship.

Subsequently, the control unit 40 obtains the initial positions θc0 and θh0 of the motors 203 and 203 ′ of the constant flow valves 200 and 200 ′ acquired in step S102, and θc (target) and θh (target) obtained in step S106. ) And the angle change amount (ie, drive angle) Δθc of the motor 203 of the constant flow valve 200 of the water side flow rate adjustment unit 20 and the angle of the motor 203 ′ of the constant flow valve 200 ′ of the hot water side flow rate adjustment unit 30. A change amount (that is, drive angle) Δθh is calculated (step S107). In the second and subsequent steps S107 according to the loop of this flowchart, the positions of the motors 203 and 203 ′ sequentially updated in step S110 described later are used instead of the initial positions θc0 and θh0 of the motors 203 and 203 ′. .
Next, the control unit 40 drives the driving speed ωc of the motor 203 of the constant flow valve 200 of the water side flow rate adjustment unit 20 and the hot water side flow rate adjustment unit 30 based on the angle change amounts Δθc and Δθh obtained in step S107. The driving speed ωh of the motor 203 ′ of the constant flow valve 200 ′ is calculated (step S108). The drive speeds ωc and ωh are calculated as follows.
ωc: ωh = Δθc: Δθh
That is, the driving speed increases as the angle change amount increases. When the motors 203 and 203 ′ are driven based on such calculation, the motor target angles θc (target) and θh (target) are reached at the same timing, respectively.

Based on the drive speed calculated in step S108, the control unit 40 causes the motor 203 of the constant flow valve 200 of the water side flow rate adjustment unit 20 and the motor 203 'of the constant flow valve 200' of the hot water side flow rate adjustment unit 30 to be controlled. Drive (step S109). As described above, the motors 203 and 203 ′ reach the motor target angles θc (target) and θh (target) at the same timing, respectively. When the setting of the flow rate is changed, the adjustment in the water-side flow rate adjustment unit 20 and the adjustment in the hot water-side water amount adjustment unit 30 are completed at the same time, so that temporary deviation from the set target value of temperature is suppressed. Can do. In addition, since the ratio of the change in the amount of water and the change in the amount of hot water is substantially constant while the motors 203 and 203 ′ are being driven, there is an advantage that the temperature change of the hot water discharged from the water discharge unit 109 is relatively smooth. . When the driving of the motors 203 and 203 ′ is finished, the control unit 40 sets the motor target angles θc (target) and θh (target) to the current position of the motor 203 of the constant flow valve 200 of the water side flow rate adjustment unit 20, the hot water side, respectively. The position of the motor 203 ′ of the constant flow valve 200 ′ of the flow rate adjustment unit 30 is updated (step S110). As described above, this value is used for the motor angle change calculation in the next step S107.
In this way, water can be discharged from the water discharge portion 19 of the faucet device 18 with the temperature and amount of hot water desired by the user.

Thereafter, it is determined whether or not an instruction to turn off the hot water mixing apparatus 1 is received from the user by a switch or the like (not shown) (step S111). If an instruction to turn off the power has not been received, an instruction regarding the temperature of the hot water and the amount of water discharged from the user is awaited (No from step S111 to step S103). Even when there is no instruction from the user to change particularly about the temperature of the hot water and the amount of water discharged, the instruction step S103 is performed at predetermined time intervals (intervals on the order of several tens of milliseconds to several hundred milliseconds) in preparation for fluctuations in the water temperature and the hot water temperature. To the loop of step S111 is repeated.
When receiving an instruction to turn off the power from the user, the control unit 40 of the hot water / water mixing device 1 executes a water stop process (from Yes in step S111 to step S112). The control part 40 performs the process similar to step S103 to step 110 mentioned above as a water stop process. However, in this case, Qc (target) and Qh (target) are both “0”, and the motors 203 and 203 ′ are driven accordingly. Finally, the positions of the motors 203 and 203 ′ return to their initial positions θc0 and θh0. The control unit 40 turns off the power after completing such water stop processing (step S113).

  According to such a hot and cold water mixing apparatus according to the first embodiment of the present invention, feed flow processing is realized by providing constant flow valves in the water supply channel and the hot water supply channel, respectively, and performing the open / close processing individually. Therefore, stable temperature control and flow rate control against disturbance can be performed.

  Next, a hot and cold water mixing apparatus according to a second embodiment of the present invention will be described. The hot and cold water mixing apparatus according to the second embodiment is a preferred embodiment in the case where a device that has a large tip and is restricted in flow rate, such as a water-saving shower, is attached to the tip of the water discharge unit 19 described above. . When a water-saving shower is attached to the tip of the water discharger 19 and the flow rate is restricted, the amount of water actually discharged regardless of the set flow rate of the water-side flow rate adjustment unit 20 and the hot water-side flow rate adjustment unit 30 of the hot and cold mixing device Changes. In this case, although the control unit 40 adjusts the set flow rate in order to obtain an appropriate temperature, there may be a problem that hot water having a desired temperature is not discharged as a result. The second embodiment is for solving such a problem.

The constant flow valve used in the hot and cold water mixing apparatus according to the second embodiment of the present invention and its peripheral part will be described with reference to FIG.
FIG. 4 is a side cross-sectional view of the constant flow valve used in the hot and cold water mixing apparatus according to the second embodiment of the present invention and its peripheral portion, and shows the constant flow valve 200 provided in the water side flow control unit 20. ing. The constant flow valve 200 according to the second embodiment has the same configuration as the constant flow valve 200 used in the hot water mixing apparatus according to the first embodiment of the present invention, but in the second embodiment, A difference from the first embodiment is that a flow rate sensor 107 is further provided in the peripheral portion of the constant flow rate valve 200 and the secondary side flow path 103.
As shown in FIG. 4, a flow rate sensor 107 is provided in the secondary side flow path 103 connected to the constant flow rate valve 200 together with the temperature sensor 105. The flow rate sensor 107 is a sensor that detects the flow rate of water flowing through the secondary side flow path 103. The flow sensor 107 includes an impeller that is provided in the secondary side flow path 103 and is rotated by water flowing through the secondary side flow path 103, and a detector that is provided outside the secondary side flow path 103. Yes. A magnet is attached to this impeller, and the rotational motion of the magnet accompanying the rotation of the impeller by flowing water is detected by a detector. Since the detection signal is a pulse signal, the rotational speed of the impeller is obtained from this signal, and the flow rate of the water flowing in the secondary side flow path 103 can be obtained. The flow rate of water obtained by the flow rate sensor 107 is transmitted to the control unit 40 and used as information for control. In the second embodiment, the hot water side flow rate adjustment unit 30 is similarly provided with a flow rate sensor 107 ′, and similarly transmits the flow rate of hot water flowing through the secondary side flow path to the control unit 40. In the configuration shown in FIG. 4, the flow rate sensor 107 is provided in the secondary flow path 103 connected to the constant flow valve 200, but the primary flow path 101 connected to the constant flow valve 200 instead. A flow sensor 107 may be provided. Similarly, the flow rate sensor 107 ′ of the hot water side flow rate adjustment unit 30 may be provided in the primary flow path 101 connected to the constant flow rate valve 200.

Control of the hot and cold water mixing apparatus according to the second embodiment having such a configuration will be described below with reference to the flowchart of FIG. However, in the control process of the hot and cold water mixing apparatus according to the second embodiment of the present invention, description of portions common to the first embodiment is omitted. Specifically, steps S201 to S210 shown in the flowchart of FIG. 5 perform the same processing as the steps S101 to S110 shown in the flowchart of FIG.
The hot and cold water mixing apparatus according to the second embodiment checks whether or not the target flow rate is obtained in step S212 after controlling the water side flow rate adjustment unit 20 and the hot water side flow rate adjustment unit 30. Specifically, the control unit 40 acquires the water flow rate Qc and the hot water flow rate Qh detected by the flow rate sensors 107 and 107 ′ provided in the water side flow rate adjustment unit 20 and the hot water side flow rate adjustment unit 30, respectively. These values are compared with the target flow rates Qc (target) and Qh (target), respectively, and it is determined whether or not the following conditions are satisfied (step S212).
Qc / Qc (target)> 0.9 and Qh / Qh (target)> 0.9
When this condition is satisfied, that is, when both the actual water flow rate Qc and the hot water flow rate Qh are larger than 90% of the target flow rate, the control unit 40 determines that the target flow rate is obtained. . When the control unit 40 determines that the target flow rate is obtained, the control unit continues the same process as in the first embodiment (from Yes in step S212 to step S213). Steps S213, S214, and S215 perform the same processes as steps S111, S112, and S113 shown in the flowchart of FIG.
When this condition is not satisfied, that is, when the actual water flow rate Qc and the hot water flow rate Qh are both 90% or less of the target flow rate, the control unit 40 determines that the target flow rate is not obtained. In this case, there is a possibility that a device that regulates the flow rate, such as a water-saving shower, is attached to the end of the water discharge unit 109, and the water discharge amount set value Qm and the water discharge device 108 or the water discharge unit 109 obtained from the water discharge unit 109. Since wrinkles occur between the water amount and the water amount, the control unit 40 resets the water discharge amount setting value Qm to a new value Qm (new) based on the following conditions (from No in step S212 to step S216). .
Qm (new) = 0.9 x (Qc / Qc (target)) x Qm
Or Qm (new) = 0.9 x (Qh / Qh (target)) x Qm
Whichever is smaller is reset as Qm (new).

  Based on the water discharge amount setting value Qm (new) reset as described above, the control unit 40 performs the processing from step S205 to step S212, and repeats this loop until the target flow rate is obtained. When the target flow rate is obtained, the process returns to normal processing (from Yes in step S212 to step S213).

  According to the hot and cold water mixing apparatus according to the second embodiment of the present invention, feed forward processing is realized by providing constant flow valves in the water supply channel and the hot water supply channel, respectively, and performing the open / close processing individually. Therefore, stable temperature control and flow rate control can be performed against disturbance. In addition, even when a device that regulates the flow rate is attached to the tip of the water discharger, it is possible to appropriately control the temperature and flow rate of the hot water.

As mentioned above, although each embodiment of the hot water mixing apparatus which concerns on this invention was described, the other structure of the constant flow valve which can be used by these embodiment is demonstrated with reference to FIG.
FIG. 6 is a side sectional view showing the structure of a constant flow valve 300 having a structure different from that of the constant flow valve 200 shown in FIGS. 2 and 4, and shows a state provided in the water-side flow control unit 20. Yes. As shown in FIG. 6, the constant flow valve 300 is installed so as to connect the primary side flow path 101 (that is, the first water supply path 12) and the secondary side flow path 103 (that is, the second water supply path 13). . An intermediate flow path 301 is provided in the constant flow valve 300, a flow restrictor 302 is provided between the intermediate flow path 301 and the secondary side flow path 103, and the primary side flow path 101 and the intermediate flow path 301 are provided. The main valve 308 of the diaphragm valve mechanism 304 is provided at a communication portion between the main valve 308 and the diaphragm valve mechanism 304. In FIG. 6, several curved arrows heading from the primary side channel 101 to the secondary side channel 103 through the intermediate channel 301 indicate the flow of water, and the primary side channel 101 and the intermediate channel 301 are shown. The symbols P1 ′, P2 ′, and P3 ′ described in a plurality of locations in the first pressure chamber 305, the second pressure chamber 306, and the secondary side flow path 103 described later indicate the water pressure at each position. Even in different positions, when the same reference numerals are given, the water pressure in each position is the same. (For example, the water pressure in the intermediate flow path 301 and the water pressure in the first pressure chamber 305 are the same “P2 ′”.)

  The flow restrictor 302 is a valve for adjusting the flow rate of water passing therethrough by changing the flow channel area formed between the intermediate flow channel 301 and the secondary flow channel 103. The flow restrictor 302 is mechanically connected to the motor 303 and moves up and down according to the rotation of the motor 303. As a result, a flow path formed between the intermediate flow path 301 and the secondary flow path 103. The area changes. As the flow path area increases, the flow rate of water passing through the flow restrictor 302 increases. The flow rate of water controlled by the flow restrictor 302 is a function of the rotation angle of the flow restrictor 302 by the motor 303.

The diaphragm valve mechanism 304 includes a first pressure chamber 305, a second pressure chamber 306, a diaphragm portion 307 that partitions the first pressure chamber 305 and the second pressure chamber 306, and a main valve 308 connected to the diaphragm portion 307, A spring 309 is provided. The first pressure chamber 205 and the second pressure chamber 206 in the constant flow valve 200 shown in FIGS. 2 and 4 are upside down.
The first pressure chamber 305 communicates with the intermediate flow path 301 through the first series passage 310. The second pressure chamber 306 communicates with the secondary side flow path 103 through the second communication path 311. The diaphragm portion 307 is a diaphragm that partitions the first pressure chamber 305 and the second pressure chamber 306, and is biased from the second pressure chamber 306 side to the first pressure chamber 305 side by a spring 309, which is a biasing means. . The spring 309 is provided in the second pressure chamber 306 and is an urging unit that urges the diaphragm portion 307 toward the first pressure chamber 305. The main valve 308 of the diaphragm valve mechanism 304 is a valve for adjusting the opening degree of the communication portion that communicates from the primary side flow path 101 to the intermediate flow path 301. The main valve 308 is connected to the diaphragm unit 307.
The diaphragm valve mechanism 304 pushes up and down the diaphragm portion 307 by the pressure difference between the first pressure chamber 305 and the second pressure chamber 306 and the force of the spring 309. The movement of the diaphragm portion 307 moves the main valve 308 up and down, and the opening degree of the communication portion that leads from the primary side flow passage 101 to the intermediate flow passage 301 is adjusted.
The temperature sensor 105 and the flow rate sensor 107 are provided in the peripheral portion of the constant flow rate valve 300 and the secondary side flow path 103 in the same manner as the constant flow rate valve 200 described in FIGS.

The operation principle of the constant flow valve 300 having such a configuration will be described with reference to FIG. As shown in FIG. 6, the pressure in the primary flow path 101 is P1 ′, the pressure in the intermediate flow path 301 is P2 ′, and the pressure in the secondary flow path 103 is P3 ′. The area of the diaphragm portion 307 is S ′, the force of the spring 209 is F ′, and the (instantaneous) flow rate of the constant flow valve 200 is Q ′.
As described above, since the first pressure chamber 305 of the diaphragm valve mechanism 304 communicates with the intermediate flow path 301 through the first series passage 310, the pressure in the first pressure chamber 305 is the same as P2 ′. It becomes. Further, since the second pressure chamber 306 of the diaphragm valve mechanism 304 is in communication with the secondary side flow path 103 through the second communication path 311, the pressure in the second pressure chamber 306 is the same as that of the secondary side flow path 103. 'Become. From the balance of the diaphragm valve mechanism 204,
P2 ′ × S ′ = P3 ′ × S ′ + F ′
Is obtained. If this equation is transformed,
P2′−P3 ′ = F ′ / S ′
It becomes. On the other hand, in the flow restrictor 302, it is known that the flow rate Q is proportional to the 1/2 power of the pressure difference. If the constant that depends only on the opening of the flow restrictor 302 is C,
Q ′ = C ′ × (P1′−P2 ′) ^1/2 = C ′ × (F ′ / S ′) ^1/2
It becomes.
Accordingly, when the force F ′ of the spring 309 is considered to be substantially constant, the area S ′ of the diaphragm portion 307 is constant, and thus the flow rate Q ′ is constant regardless of the water pressure. That is, even if there is a disturbance such as a change in the water pressure in the intermediate flow path 301, if the opening degree of the flow restrictor 302 is constant, the flow rate Q ′ is also constant.

As an example, let us consider a case where a disturbance such that the pressure P2 ′ in the intermediate flow path 301 increases occurs. When the pressure P2 ′ in the intermediate flow path 301 rises, the pressure P2 ′ in the first pressure chamber 305 of the diaphragm valve mechanism 304 communicated with the intermediate flow path 301 through the first series passage 310 also rises. Thereby, as the force applied to the diaphragm portion 307, the force due to the pressure P2 ′ in the first pressure chamber 305 becomes larger than the resultant force of the pressure P3 ′ in the second pressure chamber 306 and the force F ′ of the spring 309, As a result, the diaphragm portion 307 is pushed up.
When the diaphragm part 307 is pushed up, the main valve 308 connected to the diaphragm part 307 is also pushed up and moves in a direction to close the communicating part of the primary side flow path 101 and the intermediate flow path 301. As a result, the pressure P2 ′ in the intermediate flow path 301 decreases. In this way, the forces applied to the diaphragm portion 207 are finally balanced.
On the other hand, when a disturbance that lowers the pressure P2 ′ in the intermediate flow path 301 occurs, the diaphragm portion 307 is pushed down to open the communication portion between the primary flow path 101 and the intermediate flow path 301. And move. As a result, the pressure P2 ′ in the intermediate flow path 301 rises, and the pressure P2 ′ in the first pressure chamber 305 of the diaphragm valve mechanism 304 communicated with the intermediate flow path 301 and the first series passage 310 also rises. Eventually, the forces applied to the diaphragm portion 307 are balanced.
Thus, even if a disturbance such as the pressure P2 ′ in the intermediate flow path 301 fluctuates, the balance of the diaphragm portion 307 is recovered autonomously, and as a result, the flow rate can be kept constant. . By using such a constant flow valve 300, stable flow rate control of the hot and cold water mixing device is possible.

Note that the constant flow valve 300 used in the present embodiment closes the intermediate flow path 301 and the secondary flow path 103 when the flow rate throttle valve 302 is rotated by the motor 303 to stop the water. At the same time, the flow restrictor 202 also blocks the opening of the second communication path 311 that communicates the secondary side flow path 103 and the second pressure chamber 306 of the diaphragm valve mechanism 304, and The communication between the two pressure chambers 306 is blocked.
When the communication between the secondary side flow path 103 and the second pressure chamber 306 is blocked in this way, water is sealed in the second pressure chamber 306 in a water-stopped state, while the intermediate flow path 301 has The same pressure P1 ′ as that of the primary side flow path 101 is applied. Since the water sealed in the second pressure chamber 306 can be handled as an incompressible liquid, the pressure applied to both surfaces of the diaphragm portion 307 becomes the same pressure P1 ′ as that of the primary channel 101. Accordingly, since there is no differential pressure on both surfaces of the diaphragm portion 307 in the water-stopped state, water pressure does not act on the diaphragm portion 307 even when the constant flow valve 300 is closed, and long-term reliability of the diaphragm valve mechanism 304 can be ensured.

While the embodiments of the present invention have been described above, the above-described configuration can be modified as appropriate. For example, in each of the above-described embodiments, the temperature sensors 105 and 105 ′ (the water temperature sensor 105 and the hot water temperature sensor 105 ′) are provided in the water side flow rate adjustment unit 20 and the hot water side flow rate adjustment unit 30, respectively. Temperature sensors 105 and 105 ′ may be provided in the faucet device 18 to detect the temperatures of water and hot water immediately before mixing of hot water and water, respectively.
By having such a configuration, when piping is cooled such as in winter, a temperature difference is generated from each flow rate adjustment unit (water side flow rate adjustment unit 20 or hot water side flow rate adjustment unit 30) to the faucet device 18. Even in this case, the temperature of water and hot water can be detected at a position closer to the user, so that temperature control can be performed more appropriately.

  As described above, according to the hot and cold water mixing apparatus according to each embodiment of the present invention, it is possible to perform stable temperature control and flow rate control. In each constant flow valve used in each embodiment of the present invention, long-term reliability of the diaphragm valve mechanism can be ensured.

DESCRIPTION OF SYMBOLS 1 Hot water mixing device 10 Water supply source 12 1st water supply path 13 2nd water supply path 14 Water heater 16 1st hot water supply path 17 2nd hot water supply path 18 Water faucet device 19 Water discharging part 20 Water side flow rate adjustment unit 30 Hot water side flow rate adjustment unit 40 Control unit 101 Primary flow path 103 Secondary flow path 105 Temperature sensor 105 'Temperature sensor 107 Flow sensor 107' Flow sensor 200 Constant flow valve 200 'Constant flow valve 201 Intermediate flow path 202 Flow restrictor 202' Flow restrictor 203 Motor 203 'Motor 204 Diaphragm valve mechanism 205 First pressure chamber 206 Second pressure chamber 207 Diaphragm section 208 Main valve 209 Spring 210 First series passage 211 Second communication passage 300 Constant flow valve 301 Intermediate flow passage 302 Flow restrictor 303 Motor 304 Diaphragm valve mechanism 305 First pressure chamber 306 Second pressure chamber 307 Iyafuramu 308 main valve 309 spring 310 first communication passage 311 second communication passage

Claims (8)

A water temperature sensor provided on a water supply channel for supplying water toward the water discharge unit;
A water-side flow rate adjustment unit for adjusting the water flow rate of the water supply channel;
A hot water temperature sensor provided on a hot water supply path for supplying hot water toward the water discharge part,
A hot water flow rate adjustment unit for adjusting the hot water flow rate of the hot water supply path;
A controller that operates the water side flow rate adjustment unit and the hot water side flow rate adjustment unit, and
In a mixed faucet device that adjusts the water discharge temperature and the water discharge flow rate in the water discharge unit by adjusting the water flow rate and the hot water flow rate by the water side flow rate adjustment unit and the hot water side flow rate adjustment unit under the control of the control unit. ,
The water side flow rate adjustment unit and the hot water side flow rate adjustment unit are each provided with a constant flow valve having a predetermined flow rate flowing into the downstream side, and the constant flow valve is set with a flow rate by the control unit ,
Each of the water side flow rate adjustment unit and the hot water side flow rate adjustment unit has a flow sensor,
When the flow rate detected by each flow sensor does not reach the flow rate of each constant flow valve set by the control unit, the control unit maintains the flow rate ratio of each constant flow valve set by the control unit. The hot water mixing apparatus which makes the flow volume of each said constant flow valve smaller than the flow volume detected by each said flow sensor in the state . The constant flow valve is a valve installed between a primary flow path and a secondary flow path of the water supply channel, and between a primary flow channel and a secondary flow channel of the hot water supply channel, ,Each,
An intermediate flow path connecting the primary flow path and the secondary flow path;
A motor,
A flow restrictor that operates by the motor, changes a flow path area formed between the primary flow path and the intermediate flow path, and adjusts a flow rate of water;
A diaphragm valve mechanism that adjusts the degree of opening of the communication portion that leads from the intermediate flow path to the secondary flow path;
The diaphragm valve mechanism is
A first pressure chamber communicating with the primary channel,
A second pressure chamber communicating with the intermediate flow path;
A diaphragm portion that partitions the first pressure chamber and the second pressure chamber;
A main valve that is connected to the diaphragm portion and adjusts an opening degree of the communication portion that leads from the intermediate flow path to the secondary flow path;
Biasing means for biasing the main valve connected to the diaphragm portion toward the first pressure chamber;
The hot and cold water mixing apparatus according to claim 1 . The constant flow valve provides communication between the primary flow path and the first pressure chamber when each flow restrictor closes the primary flow path and the intermediate flow path. Cut off,
The hot and cold water mixing apparatus according to claim 2 . The constant flow valve is a valve installed between a primary side flow path and a secondary side flow path, and an intermediate flow path connecting the primary side flow path and the secondary side flow path, respectively. ,
A motor,
A flow restrictor that operates by the motor and adjusts an instantaneous flow rate of flowing water by changing a flow passage area formed between the intermediate flow passage and the secondary flow passage;
A diaphragm valve mechanism that adjusts the opening degree of the communication portion that communicates with the intermediate flow path from the primary flow path;
The diaphragm valve mechanism is
A first pressure chamber communicating with the intermediate flow path;
A second pressure chamber communicating with the secondary channel,
A diaphragm portion that partitions the first pressure chamber and the second pressure chamber;
A main valve that is connected to the diaphragm portion and adjusts an opening degree of the communication portion that leads from the primary-side flow path to the intermediate flow path;
Biasing means for biasing the main valve connected to the diaphragm portion toward the first pressure chamber;
The hot and cold water mixing apparatus according to claim 1 . The constant flow valve is configured such that when each of the flow restrictors closes between the intermediate flow path and the secondary flow path, the constant flow valve is also provided between the secondary flow path and the second pressure chamber. Block communication,
The hot and cold water mixing apparatus according to claim 4 . When the control unit changes the setting of the flow rate of each of the constant flow valves of the water side flow rate adjustment unit and the hot water side flow rate adjustment unit, the driving speed of the motor of the constant flow valve of the water side flow rate adjustment unit; The ratio of the constant flow valve of the hot water flow rate adjustment unit to the drive speed of the motor is determined by the drive angle of the flow restrictor of the constant flow valve of the water flow rate adjustment unit and the constant value of the hot water flow rate adjustment unit. Coincides with the ratio of the flow valve to the drive angle of the flow restrictor,
The hot and cold water mixing apparatus according to any one of claims 2 to 5 . The water discharge part is provided in a faucet device,
The water side flow rate adjustment unit and the hot water side flow rate adjustment unit are provided outside the faucet device,
Water and hot water whose flow rates are adjusted by the water-side flow rate adjustment unit and the hot water-side flow rate adjustment unit, respectively, are mixed in the faucet device.
The hot and cold water mixing apparatus according to any one of claims 1 to 6 . The hot water temperature sensor and the water temperature sensor are provided in the faucet device,
The hot and cold water mixing apparatus according to claim 7 .

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