JPS6231815Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a water heater used as a hot water washer in a toilet bowl or the like.

FIG. 1 is a block diagram showing an example of a control unit for a water heater, and is an example used in a hot water washer for a toilet bowl. In this figure, 1 is a water supply pump, 1A is a motor, 2 is a water stop valve for adjusting the amount of water in the water supply pump 1, 3 is an adjustment knob for operating the water stop valve 2, and a cam 4 is fixed thereto. 5 is a starting switch that is turned on and off by rotating the cam 4 of the adjustment knob 3; 6 is a hot water tank; water supplied from the water supply pump 1 via the water stop valve 2 is heated by an internal heater; Use warm water. Reference numeral 7 denotes a recirculation passage, which is provided to ensure that the load on the water supply pump 1 remains constant regardless of the opening degree of the water stop valve 2.The water heater 8 is constituted by each of the above-mentioned parts 1 to 7. be done. Further, 9 is a switching valve, which allows hot water to be supplied from either nozzle 10A or 10B. In addition, 11
is an aquarium.

When in use, the cam 4 is rotated by the rotation of the adjustment knob 3 of the water stop valve 2, which causes the switch 5 to rotate.
is turned on, and as a result, the water supply pump 1 is started and the heater of the hot water tank 6 is heated, water is supplied to the hot water tank 6 according to the degree of opening and closing of the water stop valve 2, and the changeover switch of the changeover valve 9 (Fig. (not shown), hot water is spouted from the nozzle 10A or 10B.

Next, the water heater of this invention will be explained based on the drawings.

Figure 2 is a configuration diagram showing an embodiment of this invention.
The same reference numerals as in FIG. 1 indicate the same parts. In the water stop valve 2, 21 is a cylindrical valve box, 22, 23, 24
are discharge ports provided sequentially in the longitudinal direction of the valve box 21;
The discharge port 22 communicates with the hot water tank 6, the water supply port 23 communicates with the outlet side of the water pump 1, and the reflux port 24 communicates with the inlet side of the water pump 1. Reference numeral 25 denotes a valve shaft, which is screwed together within the valve body 21 and moves forward or backward by rotation, to which an adjustment knob 3 and a cam 4 are fixed. 26 is a protrusion provided at one end of the valve shaft 25, 27 is a movable valve body that moves in the longitudinal direction within the valve box 21, and 28 is a movable valve body located between the discharge port 22 and the water supply port 23; A main valve provided at one end of the body 27, 29 is the main valve 2
8 is the main valve seat, 30 is the water supply port 23 and the reflux port 24.
An auxiliary valve provided at the other end of the movable valve body 27 between
1 is the auxiliary valve seat of the auxiliary valve 30; 32 is a coil spring for pressing the main valve 28 of the movable valve body 27 to close the main valve seat 29; 33 is the coil spring 3;
This is a pressure adjustment tool for adjusting the pressing force of valve casing 21, and is screwed together in the longitudinal direction inside the valve box 21. 34 is a reflux waterway communicating from the water supply port 23 to the reflux port 24, and 35 is a communication port.

In the hot water tank 6, there is a primary tank 41 inside,
It is composed of two tanks including a secondary tank 42 outside. 43
is a water supply pipe provided integrally with the primary tank 41, which is connected to the outlet 22 of the water stop valve 2;
Water is directly supplied into the primary tank 41 from the water. 44 is a communication port that communicates the primary tank 41 and the secondary tank 42;
5 is a heater for heating the water in the primary tank 41 to make it hot water, 46 is a thermostat in the primary tank 41, and 47 is for keeping the hot water in the secondary tank 42 at a predetermined temperature. The heat retaining heater 48 is a liquid expansion type thermostat that sets the hot water from the primary tank 41 to a predetermined temperature, and the heat sensitive element 48a at the end is held in a suspended state in the secondary tank 42. ,
It is configured to move a diaphragm (not shown) in response to the expansion of the internal liquid to adjust the temperature. Reference numeral 49 denotes a temperature fuse provided in a protection tube within the secondary tank 42, and 50 represents a manual reset type bimetallic thermostat which is provided within the secondary tank 42 and is reset above the outside of the hot water tank 6. A hot water pipe 51 supplies hot water from the secondary tank 42 to the switching valve 9 shown in FIG.

Next, the operation will be explained.

First, in order to send pressurized water from the water supply pump 1 to the hot water tank 6, turn the adjustment knob 3 to move the protrusion 26 in the direction of arrow A, and then switch 5
is turned on, the main valve 28 is pressed against the coil spring 32, and the main valve seat 29 is opened.

In this way, the pressurized water from the water supply pump 1 passes through the water supply port 23, the main valve seat 29, the discharge port 22, the water supply pipe 43 of the hot water tank 6, and is stored in the primary tank 41. The water is then heated and then enters the secondary tank 42 through the communication port 44. During this time, the hot water is heated by the heater 47 to reach a predetermined temperature and is supplied to the switching valve 9 via the hot water supply pipe 51. In addition, the primary tank 41 and secondary tank 4 of the hot water tank 6
When water temperature 2 rises above a predetermined temperature, each thermostat 46, 48 is activated to turn off the circuit, and when the water temperature falls below a predetermined temperature, each thermostat 4 is activated again.
6 and 48 operate to turn on the circuit, thereby maintaining the water temperature at a predetermined temperature. However, when the thermostats 46 and 48 do not operate due to a malfunction or the like and the water temperature in the primary tank 41 and secondary tank 42 rises abnormally, the temperature fuse 49 or the manual reset type thermostat 50 is activated. to turn off the power circuits of heaters 45 and 47. And thermostat 4
6, 48 to the normal state and then replacing the temperature fuse 49, or by manually pushing the manual reset type thermostat 50 from outside the hot water tank 6, the entire system can be reset.

In addition, when reducing the amount of water discharged from the nozzle 10A or 10B, by rotating the adjustment knob 3, the amount of water supplied from the discharge port 22 to the hot water tank 6 is reduced. When the portion 26 is moved in the direction of arrow B, the movable valve body 27
moves while coming into contact with the protrusion 26 due to the restoring force of the coil spring 32. For this reason, the distance between the main valve 28 and the main valve seat 29 becomes narrower, and the flow rate to the discharge port 22 decreases, and at the same time, the auxiliary valve 30
Since the flow is opened from the return water channel 34 to the communication port 3
5 to the reflux port 24, and the amount of water that is refluxed to the inlet side of the water supply pump 1 increases.

In addition, if you want to temporarily stop the water supply to the hot water tank 6, turn the adjustment knob 3 further and
When the protrusion 26 is further moved as shown in
The switch 5 is turned off, operates in the same manner as described above, and at the same time the protrusion 26 is released from the main valve 28.
8 is brought into contact with the main valve seat 29, the flow path to the discharge port 22 is closed. In this state, pressurized water from the water supply pump 1 enters the valve box 21 through the water supply port 23, flows from the return water channel 34 to the return port 24 via the communication port 35, and is completely returned to the inlet side of the water supply pump 1.

FIG. 4 is a circuit diagram showing an example of the water heater system of this invention. In this figure, 5 is the start switch shown in FIG. 1, 61 is a power plug,
62 turns on the power circuit of the heaters 45 and 47;
A switch 63 indicates whether the switch 62 is on or off, 64 and 65 indicate lamps indicating that the heaters 45 and 47 are turned on, and 66 is an outlet for the hot air toilet seat. Note that the same reference numerals in FIGS. 1 and 2 indicate the same or corresponding parts.

In this way, the motor 1A of the water pump 1 and the outlet 66 of the hot air toilet seat are connected in parallel, and
It is connected to a power plug 61 via a thermostat 50, a temperature fuse 49, and a switch 5. The primary tank 41 of the hot water tank 6 is connected to the plug 61 → thermostat 50 → temperature fuse 49 →
Switch 62 → Thermostat 46 → Heater 45
→ switch 62 → plug 61 →, and for the secondary tank part, plug 61 → thermostat 5
0 → temperature fuse 49 → switch 62 → heater 4
7 → Thermostat 48 → Switch 5 → Plug 6
1 is connected.

Next, the operation will be explained.

When the plug 61 is turned on with the switch 5 and switch 62 in the state shown in the figure, the outlet 66 of the hot air toilet seat is connected to the power source by the switch 5, so turning on the plug of the hot air toilet seat warms up the hot air toilet seat. It will be done.

Next, when the control knob 3 of the water stop valve 2 shown in FIG. 1 is turned and the cam 4 operates the switch 5, the switch 5 is switched and
circuit is turned off, and the circuit of the motor 1A of the water supply pump 1 is turned on. At the same time, water is supplied to the primary tank 41 and the secondary tank 42 in an amount corresponding to the degree of opening and closing of the water stop valve 2.

Next, when the switch 62 is turned on, the lamp 6
3, 64, and 65 are lit, and the heater 4 of the primary tank 41 is turned on.
5 and the circuit of the heater 47 of the secondary tank 42 is turned on,
It is heated to a predetermined temperature.

Next, each tank 41, 42 is heated by each heater 45, 47.
water is heated and becomes hot water. When the hot water reaches a predetermined temperature or higher, the thermostat 46 or 48 is activated, the circuit of the heaters 45 and 47 is turned off, the heaters 45 and 47 interrupt heating, and the lamp 6 is turned off.
4,65 goes out. However, as mentioned above, either the thermostats 46 or 48 did not operate.
When the circuit of each heater 45, 47 does not turn off,
Is temperature fuse 49 blown? Thermostat 5
0 turns off, the heaters 45,
The circuit 47 is turned off, and the lamps 63, 64, and 65 are turned off. Therefore, the fact that the lamp 63 went out while the switch 62 was on means that the temperature fuse 4
9 or the thermostat 50 is turned off, and the circuit to the outlet 66 is also turned off.

As explained above, this invention supplies water from a water supply pump to a hot water tank via a water stop valve, and in a water heater in which a return passage is provided between the water stop valve and the water supply pump, the water stop valve is used as a valve. In the longitudinal direction of the box, there is a discharge port communicating with the hot water tank, a water supply port communicating with the outlet side of the water supply pump, and a return port communicating with the inlet side of the water supply pump. A main valve seat and an auxiliary valve seat are provided between them, and a movable valve body having a main valve and an auxiliary valve that open and close the main valve seat and the auxiliary valve seat is mounted with a spring, and the movable valve body is rotated to open and close the main valve seat and the auxiliary valve seat. By configuring the valve shaft that moves in the longitudinal direction of the valve box to be screwed into the valve box, the main valve and main valve seat can be moved in response to increases and decreases in the water pressure sent from the discharge port side to the water supply pipe of the hot water tank. Since the distance between the auxiliary valve and the auxiliary valve seat can be adjusted and fixed, the amount of water and water pressure that flow back to the return port side are constant, and the influence of load fluctuations on the water supply pump can be reliably removed, and the hot water Of the tank assembly type,
It was configured with two outer tanks, and a heating heater was installed in the primary tank and a heat retention heater was installed in the secondary tank, so there was no heat dissipation in the primary tank and the temperature was kept warm. good. In addition, a thermostat and a temperature fuse are installed in each of the primary and secondary tanks to accurately capture the temperature of the hot water from the primary tank, so the temperature characteristics of the hot water are constant and the temperature of the hot water is stable. is obtained. Furthermore, we have installed a temperature fuse and a manual reset thermostat for compensation, so even if the temperature exceeds the specified temperature, we can reliably control the temperature rise, and the manual reset thermostat can be easily reset in a timely manner. can be restored to normal conditions, thus improving safety against rising water temperatures, simple configuration and easy assembly,
It also has the advantage that the number of assembly parts can be reduced and the whole can be made compact.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing an example of a control unit for a water heater, Figure 2 is a configuration diagram showing an embodiment of this invention, and Figures 3a and b are explanations showing the operation of the water stop valve in Figure 2. 4 are circuit diagrams showing an example of the water heater system of this invention. In the figure, 1 is a water supply pump, 1A is a motor, 2 is a water stop valve, 3 is an adjustment knob, 4 is a cam, 5 is a switch, 6 is a hot water tank, 7 is a recirculation passage, 8 is a water heater, and 9 is a switching valve. , 21 is a valve box, 22 is a discharge port, 2
3 is a water supply port, 24 is a reflux port, 25 is a valve shaft, 26 is a protrusion, 27 is a movable valve body, 28 is a main valve, 29 is a main valve seat, 30 is an auxiliary valve, 31 is an auxiliary valve seat, 32 is a Coil spring, 33 is a pressure regulator, 34 is a return water channel,
35 is a communication port, 41 is a primary tank, 42 is a secondary tank, 4
3 is a water supply pipe, 44 is a communication port, 45, 47 is a heater, 46, 48, 50 is a thermostat, 48a
is a heat sensitive body, 49 is a temperature fuse, 51 is a hot water pipe,
61 is a plug, 62 is a switch, 63, 64, 6
5 is a lamp, and 66 is an outlet.

Claims (1)

[Scope of utility model registration request] Water is supplied from the water supply pump to the hot water tank via the water stop valve, and a return passage is provided between the water stop valve and the water supply pump for making the amount of water discharged from the water supply pump constant regardless of the opening degree of the water stop valve. In the water heater provided on the inlet side, the water stop valve includes a discharge port that communicates with the hot water tank in the longitudinal direction of the valve box, a water supply port that communicates with the outlet side of the water supply pump, and a water supply port that communicates with the inlet side of the water supply pump. A main valve seat and an auxiliary valve seat are provided between the discharge port and the water supply port, and between the water supply port and the return port, and the valve seat moves along the longitudinal direction of the valve box between these two valve seats, and the A movable valve body equipped with a main valve that opens and closes the main valve seat and an auxiliary valve that opens and closes the auxiliary valve seat is attached to the valve body so as to constantly close the main valve seat using a spring, while the movable valve body is moved forward by rotation in the valve body. or move backward, press the movable valve body against the spring according to the amount of advance, and gradually open the main valve seat;
A valve shaft that gradually closes the auxiliary valve seat is screwed together, and the hot water tank is formed into two tanks: an internal primary tank and an external secondary tank surrounding this primary tank. 1 above from the outside of the hot water tank
a water supply pipe that supplies water into the secondary tank; a communication port located at the top of the primary tank that communicates with the secondary tank; a heater that heats water in the primary tank to make it hot water;
A heater for keeping the hot water in the secondary tank warm; a hot water pipe for supplying the hot water in the secondary tank to the outside; and a thermostat installed in the primary tank to keep the hot water in the hot water tank at a predetermined temperature. A water heater characterized in that the secondary tank is equipped with a thermostat, a temperature fuse, and a manual reset type thermostat.