JPH03181685A - fluid control valve - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a flow rate control valve used in a water heater or the like that converts cold water into hot water.

Conventional technology Conventionally, this type of technology is known, for example, from Japanese Patent Publication No. 60-259854.
It is shown in the publication No. In FIG. 4, l is a water flow controller, and the water that enters from the inlet channel 2 flows in the order of the inlet valve chamber 3, the outlet valve chamber 4, the heat exchanger 5, and the outlet pipe 6 of the water flow controller. 5, heat is exchanged from cold water to hot water. The inlet valve chamber 3 and the outlet valve chamber 4 are provided with a main control valve hole 7, and the main control hole 7 is provided with a main control valve 8.

A valve stem 10 having a stop ring 9 is fixed to the main control valve 8 . Further, the outlet valve chamber 4 and the hot water outlet pipe 6 are communicated through a bypass passage 11, and a bypass control valve 13 biased by a return spring 12 is provided in the middle thereof. The valve stem lO is connected to the motor 1 via the ring mechanism 14.
It is connected to 5. 16 is a water quantity detector, 17 is a burner, 18 is a hot water temperature setting device, 19 is a hot water supply controller, and 2
0 is the heating controller. 21 and 22 are an inlet thermistor and an output thermistor, respectively.

To explain the operation of the conventional example configured in this way,
When the set temperature of the outlet hot water temperature setting device 18 is as high as, for example, 70° C., the bypass control valve 13 is in a closed state as shown in FIG. In this state, when the faucet (not shown) at the end of the hot water tap pipe 6 is opened, the water flow detector 16 detects the flow, the burner 17 burns, heat is exchanged in the heat exchanger 5, and hot water is supplied from the hot water tap 6. It turns out. At this time, the main control valve 8 moves as follows. That is, since the combustion amount of the burner 17 is determined, the temperature set by the outlet temperature setting device 18 is determined, and the inlet water temperature is measured by the inlet water temperature setter 21, the required flow rate can be calculated. Therefore, the flow I is adjusted by the main control valve 8 to the flow rate calculated in this way. When reducing the flow rate, the motor 15 is driven to pull the valve stem IO upward in the figure, thereby narrowing the gap between the main control valve 8 and the main control valve hole 7 and reducing the flow rate. At this time, the flow rate is reduced to the required flow rate while being measured by the water amount detector 16.

The gap between the main control valve 8 and the main control hole 7 when adjusting the flow rate to i11 is different from the pressure in the inlet channel 2 and the inlet valve chamber 3 even if the same flow rate is set. When the pressure is high, the gap is narrow, and when the pressure is low, the gap is wide.

Next, lower the set temperature of the hot water temperature setting device 18 (for example, 4
The operation when set to 0℃) will be explained. At this time, the hot water temperature is set low, so a large amount of hot water can be obtained. Therefore, the motor 15 is activated to move the valve stem 10 downward in the figure. As a result, the stop ring 9
The bypass control valve 13 is opened by pressing the return spring 12. At this time, the flow of water entering from the inlet channel 2 is divided into a flow through the heat exchanger 5 and a flow through the bypass path 11. At this time, the ratio of the flow rates to the five heat exchangers and the bypass path 11 is constant, but the total flow rate is adjusted by the main control valve 8.

Problems to be Solved by the Invention However, in the conventional example, problems arise when controlling the total flow rate. That is, with the bypass control valve 13 closed and the stop ring 9 in contact with the bypass control valve 13, the main control hole 7 and the main control valve 8 must be opened at a constant degree. (To adjust the flow rate when setting high temperatures) If the bypass control valve 13 is open and the pressure in the inlet channel 2 is high, the total flow rate will increase, so move the main control valve 8 upward in the figure. The gap between the main control hole 7 and the main control valve 8 is narrowed to reduce the flow rate. At this time, the opening degree of the bypass control valve 13 also becomes small, causing a problem in that the flow rate flowing through the bypass path 11 decreases.

In addition, in the conventional example, since the flow node of the main Mill valve 8 is configured at one location, the stop ring 9 is connected to the bypass control valve 13.
Even when the main control hole 7 and the main control valve 8 are in contact with each other, a certain gap must be provided between the main control hole 7 and the main control valve 8, and when the bypass control valve 13 is open and the inlet channel 2 pressure is particularly high, the flow rate is reduced. It was not possible to reduce the flow rate to a small amount when using the pump.

Therefore, an object of the present invention is to provide a control valve with excellent controllability that can reduce the flow rate to a small amount even when the bypass control valve is open or closed at high water pressure. That is.

Means for Solving the Problems In order to achieve the above object, the present invention provides a primary pressure chamber provided with a fluid inlet, a secondary pressure chamber provided with a first fluid outlet and a second fluid outlet. a pressure chamber, the primary pressure chamber and the second pressure chamber;
a communication section that communicates the secondary pressure chambers; a flow rate adjustment means that moves between the primary pressure chamber and the secondary pressure chamber within the communication section in two directions, forward and reverse, and is capable of adjusting the flow rate at two locations; and the flow rate adjustment section. a drive means for driving said first outlet or said second outlet;
A passage opening/closing means provided at at least one of the outlets of the passageway is provided.

Operation The fluid control valve of the present invention has excellent flow rate controllability because the fluid control valve of the present invention adjusts the flow rate with the flow path opening/closing means in the open or closed state due to the above configuration.

EXAMPLE An example of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 3, 23 is a valve body, and this valve body 23 is provided with a primary pressure chamber 25 provided with an inlet 24, and a first outlet 26 and a second outlet 27 for fluid. A secondary pressure chamber 28 is provided. The primary pressure chamber 25 and the secondary pressure chamber 28 communicate with each other through a communication portion 29 . The shape of the communication portion 29 is a combination of a reduced conical channel 30 and a cylindrical channel 31 from the primary pressure chamber 25 to the secondary pressure chamber 28 .

Inside the communication portion 29, there is a flow 1ti moving in two directions, forward and reverse.
A flow rate control valve 32, which is a flow rate control means capable of adjusting A, is provided. The shape of the flow I/Pl control valve 32 is composed of an enlarged part 33 in which the cross-sectional area of the scene control valve 32 is enlarged, and a cylindrical part 34 in which the cross-sectional area is constant. A valve shaft 35 is provided on the secondary pressure chamber 28 side of the flow rate control valve 32, and a valve 36 serving as a flow path opening/closing means for closing the first outlet 26 is constructed of a spring 37 at the tip thereof. . 38 is a retaining ring that prevents the valve 36 from coming off the valve shaft 35. On the other hand, the above style! A piston portion 40 is formed on the primary pressure chamber 28 side of the regulating valve 32 and is integrally formed with the flow regulating valve 32 and sealed with an O-ring 39. This piston part 4
0, a tertiary pressure chamber 41 is provided, and this tertiary pressure chamber 41 and the secondary pressure chamber 28 are communicated with each other through a communication hole 42. A drive shaft 43 is directly connected to the piston portion 40. A gear 44 is provided at the tip of the drive shaft 43, and the gear 44 is driven by a motor 45.

Next, the operation of this embodiment will be explained with reference to FIGS. 1 and 3. The fluid entering from the inlet 24 is controlled by the flow rate control valve 32 and exits from the first outlet 26 or the second outlet 27. FIG. 1 shows a state in which the flow rate is not controlled in a neutral state. First, the operation when flowing out from the second outlet 27 will be explained with reference to FIG. When the valve 36 is moved to , the flow rate is controlled with the spring 37 biasing the valve 36. The flow rate can be controlled by changing the gap size between the cylindrical flow path 31 and the enlarged portion 33 of the flow rate adjustment valve 32. When adjusting a large flow rate, it is sufficient to move the flow rate adjustment valve 32 largely to the left side in the figure, and when adjusting a small flow rate, the flow rate adjustment valve 32 can be moved largely to the left side in the figure.
The minute flow rate adjustment state in which the valve 2 is moved to the right side in the figure is the state shown in FIG. 1, and at this time the valve 36 is in the closed state.

Next, the operation when flowing out from the first outlet 26 will be explained with reference to FIG. The ring 38 brings it into a closed state. In this state, the weight control that controls the flow rate can be performed at a flow rate of 1 m by changing the gap size between the reduced conical flow path 30 and the cylindrical portion 34 of the flow rate control valve 32. When adjusting a large flow rate, the flow control valve 32 may be moved largely to the right in the figure, and when adjusting a small flow, the flow I control valve 32 is moved to the left in the figure. The small 2iiL amount adjustment state is the state shown in FIG. 3, and at this time the valve 36 is in the open state. In this embodiment, the flow rate can be adjusted with the flow rate control valve 32 when the valve 36 is open or closed, and the secondary pressure chamber 28 and the tertiary pressure chamber are provided with the piston part 40 and a communication hole. This has the effect that the rotational torque of the motor 45 can be reduced by balancing the pressure of the motor 41.

Effects of the Invention As described above, the present invention provides a primary pressure chamber provided with a fluid inlet, a secondary pressure chamber provided with a first and second fluid outlet, and a primary pressure chamber provided with a fluid inlet. a communication section that communicates the chamber and the secondary pressure chamber; and a communication section that communicates the primary pressure chamber with the second pressure chamber within the communication section.
a flow rate adjustment means that can move between the pressure chambers in two directions, forward and reverse, and adjust the flow rate at two locations; a drive means that drives the flow rate adjustment means; and at least one of the first outlet or the second outlet. and a flow path opening/closing means provided in the flow rate adjusting means, and when the flow I adjusting means moves in the forward direction, the flow rate adjusting means is enabled to adjust the flow rate of the flow rate adjusting means with the flow path opening/closing means in an open state. When the valve moves in the opposite direction, the flow rate adjustment means can adjust the flow rate with the flow path opening/closing means in the closed state, so that when the outlet side valve is closed and the flow rate is adjusted, the flow rate adjustment means Flow 1 while ensuring the closed state! II
A small knot? It is possible to control the flow rate from JLt to a large flow rate, and when adjusting the flow rate with the outlet side valve in the closed state, the flow rate can be adjusted while ensuring the outlet side valve is in the closed state, from a small flow rate to a large flow rate. Even if the flow rate is throttled down to a small amount using the flow rate regulating valve, the opening degree of the outlet side valve will not become narrow, resulting in excellent controllability.

[Brief explanation of drawings]

1 to 3 are cross-sectional views of a fluid control valve showing an embodiment of the present invention, and FIG. 4 is a water circuit diagram of a water heater using a fluid control valve showing a conventional example. 24...Inlet, 25...Primary pressure chamber,
26...First outlet, 27...Second outlet, 28...Secondary pressure chamber, 29...
Communication portion, 32...Flow rate adjustment means (flow rate adjustment valve)
, 36... Channel opening/closing means (valve), 45...
...Driving means (mochiri).

Claims (1)

[Claims] a primary pressure chamber provided with a fluid inlet; a secondary pressure chamber provided with a first and second fluid outlet;
a communication section that communicates the secondary pressure chamber with the secondary pressure chamber; and a communication section that communicates between the primary pressure chamber and the secondary pressure chamber within the communication section,
a flow rate adjustment means that can move in the direction and adjust the flow rate at two locations;
It consists of a drive means for driving the flow rate adjustment means, and a passage opening/closing means provided at at least one of the first outlet or the second outlet, and when the flow rate adjustment means moves in the forward direction, The flow rate adjustment means can adjust the flow rate with the flow path opening/closing means in an open state, and when the flow rate adjustment means moves in the opposite direction, the flow rate adjustment of the flow rate adjustment means can be performed with the flow path opening/closing means in a closed state. Fluid control valve made possible.