JPH0833216B2 - Hot water mixing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water mixing apparatus that mixes hot water and water to obtain an appropriate temperature and that is equipped with a flow control valve that electrically controls supply and stop of the mixed hot water. Is.

2. Description of the Related Art A conventional hot and cold water mixing device of this type is shown in FIG. (For example, Japanese Utility Model Laid-Open No. 61-18424) In FIG. 13, a water supply system 1 is branched into two systems, and a hot water supply pipe line 3 and a water supply pipe line 4 that pass through a water heater 2 have a constant temperature hot water supply device 5.
It is connected to the. Inside the constant temperature hot water supply device 5, a hot water amount valve 6 is connected to the hot water supply pipe line 3 and a water amount valve 7 is connected to the water supply pipe line 4 to adjust the mixing ratio. The mixing conduit 8 is provided with a thermistor 9 for detecting the temperature of the mixed hot water. Based on a signal from the thermistor 9 and a signal from a controller 10 which arbitrarily adjusts the temperature of the mixed hot water, a controller 11 controls the hot water amount valve 6 and The water quantity valve 7 is controlled. The mixed hot water is supplied to a bathtub 13, which is a hot water supply target, through a faucet 12 provided at a terminal of the mixing conduit 8. The hot water amount valve 6 and the hot water amount valve 7 are driven by the hot water amount valve motor 14 and the hot water amount valve motor 15 controlled by the control device 11, and are feedback-controlled by the signal of the thermistor 9.

Problems to be Solved by the Invention However, since the conventional hot and cold water mixing apparatus is configured as described above, it has the following problems.

(1) Since the flow rate is adjusted by the faucet 12, it was necessary to open and close it manually, which made the operation difficult.

(2) It was necessary to manually open and close the flow path and adjust the flow rate, and remote control was not possible.

The present invention solves such conventional problems, and an object of the present invention is to provide a hot and cold water mixing apparatus which is provided with an electric flow rate control valve and is capable of simplifying operation, remote operation, and preventing freezing. .

Means for Solving the Problems To achieve the above object, the hot and cold water mixing apparatus of the present invention opens and closes a hot and cold water mixing valve and at least a flow path detachably connected above the hot and cold water mixing valve. A flow control valve,
Electrical drive means for driving this flow control valve, hot water and water inlet provided at the bottom of the hot and cold water mixing valve, water drain plug provided near this inlet, and mixed hot water provided at the upper part of the flow control valve Outlet, a vent plug provided in the vicinity of this outlet, a setting device for setting at least supply and stop of the mixed hot water, and a controller for controlling at least the flow control valve according to the setting of this setting device. Is.

Effect of the Invention With the above-described configuration, the present invention enables the supply and stop of the mixed hot water by the operation of the setting device by the touch operation of the electrical switch, and also enables the supply and stop of the remote hot water and the opening of the water drain plug. And by opening the flow control valve by operating the setting device, opening the ventilation plug, or removing the flow control valve, the water drain valve provided near the inlet and water of the hot and cold water mixing valve below the flow control valve Drainage is performed to achieve drainage of both the hot and cold water mixing valve and the flow control valve.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a system diagram of the first embodiment of the present invention. In FIG. 1, hot water supplied from the gas instantaneous water heater 16 passes through a hot water supply pipe 17, and water passes through a water supply pipe 18. Enter the hot water mixing unit 19. The hot and cold water mixing unit 19 includes a mixing valve section 20 for electrically controlling hot water and water, and a supply of mixed hot water.
An electrically controlled flow control valve 21 for supplying hot water by stopping and adjusting the flow rate and switching the route to a plurality of hot water supply targets. Setting devices 26, 27, 28 are provided in the vicinity of the shower 22, which is the target of hot water supply, the currant 23 in the washing area, and the discharge port 25 to the bathtub 24, respectively. The setter 27 constitutes a main setter, and the signal lines of the setters 26 and 28, which are sub-setters, are spliced together. Outside the bathroom 29, there is a hot and cold water mixing unit.
In addition to 19, a controller 30 equipped with a microcomputer is provided. The hot water mixing unit 19 may be installed between the wall of the bathroom 29 and the wall of another room, the ceiling of the bathroom 29, the dressing room, the floor, the eaves, and the like. The controller 30 may be a dressing room, the ceiling of the bathroom 29, another room such as a kitchen, or the like. Further, another room remote control 31 is provided in another room such as a kitchen, and further, via a repeater 32, a home automation information line 33 and a telephone 34.
It is connected to the.

 FIG. 2 shows details of the setting device 27.

Bathtub switch that doubles as a hot water supply start / stop switch that starts supplying hot water when pressed once and stops when pressed again, and as a changeover switch that switches to the pressed side when another switch is pressed during hot water supply 35, a Karan switch 36 in the washing area, and a shower switch 37 are provided corresponding to the hot water supply target. As will be described later in detail, these switches 35, 36, 37 are designed so that the hot water can be discharged at a preset mixed hot water temperature and flow rate, and can be stopped at a preset integrated flow rate value. If it is desired to change the preset temperature, it can be changed by the temperature up switch 38 and the down switch 39. However, Karan 23 and shower 22
Does not require high temperature, so it is not possible to control the setting above 45 ℃. The set temperature value is displayed on the display lamp 40. When it is desired to change the preset flow rate, the flow rate can be changed by the up switch 41 and the down switch 42. When the switches 41 and 42 are continuously pressed, the flow rate changes continuously, and the flow rate change stops when the valve is fully opened or is throttled to a predetermined flow rate value. The call switch 43 is a switch for generating a signal sound for calling another person via another remote controller when pressed. The priority switch 44 is a switch for giving priority to the setting device in the bathroom 29 and not accepting a signal from the outside when the switch is turned on. This is for preventing the inconvenience that the hot water is started by operating the remote controller 31 of the other room provided in the kitchen or the hot water is started by the telephone 24 while being used in the bathroom, for example. Further, when the priority switch 44 is turned off, the electric circuit of the remote controller in the bathroom 29 is de-energized, and the deterioration of electronic components due to continuous energization is prevented. In addition, the buzzer 45 sounds for a short time in response to the operation of each switch so that the operation can be surely recognized, and a lamp is provided for a necessary switch so that the operation can be surely confirmed.

FIG. 3 shows the setting 26 for the shower. The setting device 27, which is the main setting device, the hot water supply start / stop switch 46, the temperature up switch 47, and the down switch 48 are provided in parallel in the control circuit, and can be operated from either the setting device 27 or 26. Is configured. That is, it is possible to start or stop the hot water discharge and raise or lower the temperature of the mixed hot water from any setting device. The shower setting device 26 is provided with a cycle shower switch 49, a cool down switch 50, and a warm up switch 51 as special functions. When the cycle shower switch 49 is pressed, suitable hot water and low temperature hot water are cyclically supplied within the temperature range set by the set temperature and the temperature difference volume 52. When the cycle switch 49 is pressed again, the cycle shower stops and returns to the proper temperature. When the cool down switch 50 is pressed, the temperature of the mixed hot water gradually decreases from the set temperature to the temperature difference set by the temperature difference volume 52, and after a lapse of a predetermined time, the hot water supply is automatically stopped. If you press the warm-up switch 51,
The temperature gradually rises from ℃ to the set temperature, and after reaching the set temperature, the hot water is continuously supplied at that temperature. The cycle shower switch 49, the cool-down switch 50, and the warm-up switch 51 function only after the shower switch 46 is pressed. These switches can only be selected as an alternative and can be released by pressing again.

FIG. 4 shows details of the setting device 28 provided near the bathtub. A bathtub switch 53, an up switch 55, and a call switch 56 are provided in parallel with the switches 35, 38, 39, 43 of the setting device 27 which is the main setting device in a control circuit.
It can be operated from either 27 or 28. For example, the bathtub switch 35 of the setting device 27 can be pressed to start hot water, and the bathtub switch 53 of the setting device 28 can stop the hot water.

FIG. 5 shows the details of the controller 30. A power supply AC100V is drawn into the controller 30, a built-in switching power supply lowers and rectifies the voltage, and a DC low voltage is supplied to a main control circuit including a microcomputer and the like. AC 100 V is turned on by turning on the power switch 57, the control system is energized, and if necessary, the gas instantaneous water heater 16 can be turned on at the same time by connecting it. The temperature supplied from the shower 22 and the calan 23 can be set in advance by the calan and shower temperature preset volume 58. The bath temperature preset volume 59 can preset the temperature of the hot water supplied from the outlet 25. By setting the amount of preset water filling 60
An integrated flow rate suitable for the capacity of the bathtub 24 can be preset. For the Karan 23 and the shower 22, a specific value (for example, 100
Hot water supply is stopped when the integrated value reaches (). Also,
These integrated flow rate values are set so that the hot water supply can be stopped when the maximum thinking time is exceeded, in order to respond to the failure of the integrating system and the detection system in the unlikely event of a double safety. Has been. The hot water supply flow rate can be preset by the flow rate preset volume 61, and the minimum flow rate value when the flow rate is narrowed down can be switched by the minimum flow rate switch 62. This minimum flow rate switch 62 is, for example, when combined with the gas instantaneous water heater 16 as in this embodiment,
In order to prevent the fire from extinguishing below the minimum ignition flow rate value of the water heater, switch to maintain the mixed flow rate so that combustion can be maintained according to the set value of the gas instantaneous water heater 16 and the supply water temperature. To use.

FIG. 6 shows the details of the remote controller 31 in the other room. When the priority switch 44 of the setting device 27 is turned off, the lamp 63 lights up and the remote control of the other room
Operation from the 31 side is possible. When the bathtub switch 64 is pressed, hot water supply is started under the same hot water supply conditions as the bathtub switch 35 of the setting device 27, and it can be stopped by pressing it again. Of course,
It is also possible to stop at the integrated flow rate value. A timer hot water discharge is also possible from the remote controller 31 of the other room, and a timer hot water discharge is possible by selecting a mode with the mode selection switch 65 and adjusting the time with the time adjustment switch 66. The clock display, the timer time, etc. are displayed on the display unit 67. When tapping the timer, it is necessary to press the reservation switch 68.

 FIG. 7 shows details of the hot and cold water mixing unit 19.

Inside the mixing valve frame 71 having the water inlet 69 and the hot water inlet 70, check valves 72, 73, a pressure balance valve 74, a mixing valve 75, and a mixed hot water for balancing the pressures of the hot water and the hot water. A thermistor 76 for detecting the temperature and a flow rate sensor 77 are provided.

The pressure balance valve 74 is of a type in which water and hot water flowing between the piston 78, the water side valve body 79, and the hot water side valve body 80 adjust the pressure while rotating the element by the blades provided on each valve body. Is.

The mixing valve 75 is constructed as shown in detail in FIGS. 8 and 9.

The cylindrical cartridge 81 includes a water side opening 82, a hot water side opening 83,
It has a mixing opening 84, and has a water side valve seat 85 and a hot water side valve seat inside.
86 are formed. The end of the cartridge 81 is plugged
87 and a coupling 88 are provided. A water side valve body 89 and a hot water side valve body 90 of the mixing valve are provided so as to face each other with a valve seat interposed therebetween as shown in the figure. The water side valve body 89 and the hot water side valve body 90 are
It is formed in a tapered shape so that the flow contracts toward the mixing chamber 91. Further, the water side valve seat 85 and the hot water side valve seat 86 also have a tapered shape as shown in the figure, which is a function of the relationship between the pressure difference across the valve body and the flow rate in proportion to the valve displacement. I'm doing it. However, the taper angle of the valve body and the taper angle of the valve seat are slightly different from each other to prevent biting due to surface contact. The water-side valve body 89 is biased by a spring 92 and is supported by the receiving plate 93. The hot water valve body 90 is biased by a spring 94. The water side valve body 89 is supported by a stopper 95 and attached to a shaft 96. Further, the hot water valve body 90 has a shape in which a shaft 96 projects into a hole provided inside. The set load of the spring 94 is set strongly so as to eliminate the rattling of the screw part 97 and other parts of the shaft 96 and to fix the hot water valve body 90. O-ring 9 on shaft 96
8 and 99 are provided, and the materials are different on the water contact side and the contact atmosphere side. External stepping motor for driving
100 is provided, and the drive shaft 102 via the reduction gear 101.
The cam 103 is rotated via the, and the rotational force is transmitted to the head portion of the drive shaft 96 that fits into the uneven portion 104 provided inside. The shaft 96 thereby slides spirally left and right in the figure. The reduction gear 101 is fixed to a mount 105, and the mount 105 has
A micro switch 106 for detecting the hot water side fully open point and a micro switch 107 for detecting the water side fully open point are fixed. The mounting base 105 and the coupling 88 are fastened with a lock nut 108 after being prevented from rotating. These mixing valve portions 19 can be integrally handled in the state shown in FIG. 8, and in this state, they can be inserted into the mixing valve frame body 71 and the snap ring 109 can be attached to the end portion of the plug 87. It is designed so that it can be attached.

Returning to FIG. 7, the mixing valve section 20 and the flow rate control valve section 21 are detachably fastened by a flange 110. Flow control valve 21
Is a three-way valve that switches the flow paths by displacing the valve body (1) 111 and the valve body (2) 112 to the left and right in the figure, and performs water shutoff and flow rate adjustment. A temperature safety valve 113 that prevents hot water from being mechanically supplied to the system of the callan 23 and the shower 22 in the washing place after the flow control valve 21 in case of mechanical failure.
Is provided. Karan 23 and shower 22 further downstream
A three-way valve type switching valve 114, which has a similar configuration to the flow control valve 21 and which switches the sides, is provided.

Details of the flow control valve 21 are shown in FIGS. 10 and 11. The valve body (1) 111 and the valve body (2) 112 are configured by metal fittings 115, 116 with rubber packings 117, 118 baked, and the rubber packings 117, 118 are substantially tapered in order to linearize the valve characteristics and reduce the water temperature. It is molded into. The valve body (1) 111 and the valve body (2) 112 are biased by a spring 119, and when not mounted on the flow control valve frame body 120, a step 122 provided on the shaft 121 and a stopper screwed to the shaft end. It stops by abutting the metal fitting 123. This flow control valve 21 part includes a valve seat 124 of the valve body (1) 111.
The opening 125 and the pedestal 126 are integrally provided. pedestal
A coupling 127 is fixed to the 126 by means of a mounting base 128, which prevents the coupling 127 from rotating and coming off. The shaft 121 is provided with O-rings 129 and 130. These O-rings 129,
The material of 130 is also different from that of the mixing valve section. A gear 131 is provided on the head portion of the shaft 121 so as to fit into the uneven portion.
This gear 131 is a reduction gear driven by the DC motor 132.
It meshes with the gear 135 attached to the drive shaft 134 of 133, and D
The electric power of the C motor 132 is transmitted. Cam 13 on gear 135
6,137 are provided, and the micro switches 138, 139, 140 are opened and closed depending on the rotation angle. Micro switch 1
38 is a switch for stopping the flow and detecting the closing point, the micro switch 139 is a switch for detecting the fully open point of the valve body (2) 112, and the micro switch 140 is a switch for detecting the fully open point of the valve body (1) 111. Is. The valve shaft 121 and the shaft 134 of the drive unit are provided in parallel as shown in the figure, and the gear 13 as a transmission means
Since the driving force is transmitted by means of 1 and 135, the entire length is shorter than that in the case where they are arranged in series. Further, adjustment of the valve body (1) 111 and the valve body (2) 112 is easy because the gear 131 can be manually driven. Further, in response to the drive, the shaft 121 moves back and forth in FIG. 10, but
The clearance is changed by changing the overlap margin of the teeth of the gear 131 and the gear 135. The pedestal 126 is the flow control valve frame 120
Although it is fixed with screws, it is detachable in the state shown in FIG. 10 by removing the screws.

 FIG. 12 shows the details of the temperature safety valve 113.

The temperature safety valve 113 is also configured such that the cartridge 141 can be removed from the valve frame body 142 by simply removing the retaining ring 143 at the end. Inside the cartridge 141, the valve body 144
Is provided with a valve seat 145 that abuts against. The valve body 144 is fixedly attached to a wax thermo body 146, which is a temperature sensitive body, and is configured so that the valve body 144 is displaced by expansion and contraction of a piston 147 at the head of the wax thermo body 146. The valve element 144 is urged by a spring 148, and the piston 147 is urged by a spring 150 via an abutment metal fitting 149. A small hole 151 is provided in a part of the valve seat 145, and a small flow rate is made to flow in order to speed up recovery at the time of operation. In the cartridge 141,
Further, openings 152 and 153 are provided.

As shown in the figure, the wax thermostat 146 is provided on the downstream side of the valve seat 145, but it operates by heat transfer while supplying hot water to the discharge port 25 to the bathtub, and blocks the flow path. This is to prevent it from being lost. In order to make it more certain, it is conceivable that the valve frame body 142 is made of resin, or the joint with the flow rate control valve frame body 120 is flanged and the heat insulating material is bitten.

The switching valve 114 eliminates only the water stop function of the flow control valve 21 .

In this embodiment, a three-way valve is combined to supply the mixed hot water in three directions, and since the flow control valve 21 which is the three-way valve located at the most upstream serves to stop water, a switching valve located downstream is provided. 114 does not have to have a water stop function. Further, since the flow rate control valve 21 also has a flow rate adjusting function, it is not necessary to adjust it on the downstream side. It is also possible to supply hot water to more places by adding a three-way valve. Further, a vent plug 154 is provided in the vicinity of the mixed hot water outlet 25 ′ of the flow control valve 21 which is detachably connected above the hot and cold water mixing valve 20, and hot and cold water inlets 70, 69 at the bottom of the hot and cold water mixing valve 20. Water drain plugs 155 and 156 are provided in the vicinity of, and a water drain plug 157 is provided in the path to the switching valve 114.

 Next, the operation of this embodiment will be briefly described.

When the bathtub switch 35 of the setting device 27 of the bathroom 29 is pressed, the power switch 57 is turned on, and tapping is started under the condition that the priority switch 44 is switched to the bathroom 29 side. At this time, the temperature and flow rate of the mixed hot water and the integrated flow rate value for performing the fixed amount of water stoppage are values preset by the controller 30 . When the bathtub switch 35 is pressed again during hot water supply, hot water supply is stopped. When the hot water supply is continued, the hot water supply is stopped when the integrated flow rate value is reached. When hot water is being supplied by pressing the bathtub switch 35, the setting of the mixed hot water temperature can exceed 45 ° C and can be changed to hot water of 50 ° C. The flow rate can be increased / decreased by the switches 41 and 42, but the maximum flow rate can be changed up to the position where the valve body (1) 111 is fully opened, and the minimum flow rate can be changed up to the flow rate set by the minimum flow rate switch 62. The minimum flow rate value is adjusted by feeding back the value of the flow rate sensor 77. Further, the previous flow rate integration is also performed by integrating the values of the flow rate sensor 77.

For the sake of safety, hot water at 45 ° C or higher cannot be discharged while pressing the Karan switch 36 or the shower switch 37 to discharge hot water. If hot water is supplied due to a failure of the control system or valve system, the temperature safety valve 113 closes the flow path to extremely narrow the hot water.

When hot water is supplied by an external signal other than the bathroom 29, the priority switch 44 is turned off.

For the call switch 43, the buzzer sounds with the remote controller 31 of the other room only while the switch is kept pressed.

When a power failure occurs during hot water supply, a backup battery (not shown) provided in the control unit 30 immediately closes the flow control valve and stops hot water supply.

When the temperature becomes low when not in use, the flow control valve 21 is forcibly opened a little when the temperature of the thermistor 76 part has dropped to some extent, and a small amount of water and hot water is dropped. Therefore, the water in the pipe flows and the hot water is also supplied from the gas instantaneous water heater 16. When the temperature of the thermistor 76 rises to a certain set range, the flow control valve 21 is closed. After that, when it gets cold, the above operation is repeated.

If the risk of freezing is predicted in advance, the main taps (not shown) of hot water and water are closed in advance, and then the ventilation plug 154 at the upper part of the mixing unit 19 and the drain plugs 155, 156, 157 at the lower part of the mixing unit 19 are closed. The water inside the unit can be drained by operation. Further, since the hot and cold water mixing valve 20 is provided below the flow rate control valve 21 and the water drain plugs 155 and 156 are provided near the hot water and water inlets 70 and 69, the water drain plug 155, By opening 156 and operating the setters 26, 27, 28, 31 to open the flow control valve 21, both the hot and cold water mixing valve 20 and the flow control valve 21 can be drained. Also, if the ventilation plug 154 is clogged, or if there is a power outage or D
If the C motor 132 fails, open the water drain plugs 155 and 156 and remove the flow control valve 21 to ensure a quick and reliable hot and cold water mixing valve 20.
Both the and the flow control valve 21 can be drained.

When water is cut off or when the flow sensor 77 fails, it is determined that no signal from the flow sensor is output, and the flow control valve 21 is closed. Further, even when the temperature safety valve 113 operates during hot water supply to the calan 23 and the shower 22, the signal from the flow rate sensor 77 is not output and the flow rate control valve 21 is closed. These restorations are performed by pressing the switches 35, 36, 37 etc. again.

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it has the following effects.

(1) By opening the water drain plug and operating the setting device to open the flow control valve, drainage is discharged from the hot water of the hot and cold water mixing valve below the flow control valve and the water drain plug provided near the water inlet. The hot water mixing valve and the flow control valve can be drained.

(2) In the event of a power failure or failure of the electric drive means, the water drain plug is opened and the ventilation plug is also opened, so that hot and cold water can be supplied quickly and reliably without opening the flow control valve that operated the setting device. Both the mixing valve and the flow control valve can be drained.

(3) When the vent plug is clogged, when there is a power failure or when the electric drive means fails, the water drain valve is opened and the flow control valve is removed to ensure quick and reliable water supply for both the hot and cold water mixing valve and the flow control valve. Can be pulled out.

[Brief description of drawings]

FIG. 1 is a system diagram of the first embodiment of the present invention, FIGS. 2 to 4 are front views of a setting device used in the same embodiment, and FIG. 5 is a front view of the same controller. FIG. 7 is a front view of the setting device, FIG. 7 is a partially cutaway sectional view of the hot and cold water mixing valve unit, and FIGS. 8 and 9 are configuration diagrams of the mixing valve portion, FIG. 10, FIG.
FIG. 11 is a configuration diagram of the same flow rate control valve unit, FIG. 12 is a configuration diagram of the same temperature safety valve unit, and FIG. 13 and FIG. 20 are system configuration diagrams of a conventional hot and cold water mixing apparatus. 20 …… Hot water mixing valve, 21 …… Flow control valve, 25 ′ …… Mixed water outlet, 26,27,28 …… Setting device, 30 …… Control device, 31 ……
Setting device, 69 ... Water inlet, 70 ... Hot water inlet, 154 ... Ventilation plug, 155,156,157 ... Water drain plug,

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location F24D 19/08 (56) References JP 62-251814 (JP, A) JP 61- 153422 (JP, A) JP 62-83567 (JP, A) Actually open 60-74733 (JP, U) Actually open 55-22559 (JP, U)

Claims (1)

[Claims] Claim: What is claimed is: 1. A hot and cold water mixing valve for mixing hot water and water, a flow rate control valve detachably connected above the hot water and water flow valve for opening and closing at least a flow path, and an electrical drive for driving the flow rate control valve. A driving means, a hot water inlet and a water inlet provided at the lower portion of the mixing valve, and a drain plug provided near the inlet,
An outlet for the mixed hot water provided in the upper portion of the flow control valve, a vent plug provided near the outlet, and at least supply of the mixed hot water,
A hot and cold water mixing apparatus comprising a setting device for setting stop, and a controller for controlling at least the flow control valve according to the setting of the setting device.