JPH03211353A - Fluid control valve device - Google Patents

Abstract

PURPOSE:To cause a temperature control and a flow rate control to be attained equal in two normal and reverse directions by a method wherein an angle formed by a reduced conical flow passage and a cylindrical flow passage in a communication part is the same as an angle formed by an enlarged conical part and a cylindrical part of a valve. CONSTITUTION:When an amount of supplied hot water is to be controlled, a valve member 33 is moved toward a primary pressure chamber 30 in a communication part 32. An amount of hot water flowing out through a hot water supply output 27 is controlled by a reduced small conical flow passage part 34 of the communication part 32 and a corner 37a of a cylindrical part 37. When an amount of supplied hot water for a bath is controlled, the valve member 33 is moved toward the secondary pressure chamber 31 in the communication part 32. An amount of hot water flowing out through a hot water supply outlet 28 for bath is controlled by a corner 35a of a cylindrical flow passage 35 in the communication part 32 and an enlarged conical part 36 of the valve member 33. In this case, an angle 38 formed by the reduced conical flow passage 34 and the cylindrical flow passage 35 in the communication part 32 in the same as a conical angle 39 of the enlarged conical part 36 of the valve member 33. With such an arrangement, same temperature characteristic and flow rate characteristic in the normal and reverse two directions can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a valve device installed in a gas water heater or the like to control the flow rate of water or the like flowing through a heat exchanger.

2. Description of the Related Art In recent years, the mainstream of gas water heaters and the like has become one that controls the flow rate while keeping the outlet temperature constant even when the incoming water temperature and water pressure change.

Conventionally, this type of fluid control valve device has been developed, for example, by
A configuration as shown in Japanese Patent No. 259854 was common. The structure will be explained below with reference to FIG. By heating the heat exchanger 5 with a burner 17, cold water is exchanged with hot water. The inlet valve chamber 3 and the outlet valve chamber 4 are communicated through a main control well hole 7, and the main control valve hole 7 is provided with a main control valve 8. A valve stem 10 having a locking ring 9 is fixed to the main control valve 8 .

Further, the outlet valve chamber 4 and the hot water outlet pipe 6 communicate with each other 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 10 is the link gutter groove 1
It is connected to the motor 15 via 4. So motor 1
5 in forward and reverse rotation, the inside of the main control valve hole 7 is
By moving the main control valve 8 in two directions up and down, the flow path area can be arbitrarily varied to control the flow rate.

Note that 16 is a water quantity detector, 16 is a hot water temperature setting device, 19 is a hot water supply controller, 20 is a heating controller, and 2122 is an inlet thermistor and an outlet thermistor 1, respectively.

Problems to be Solved by the Invention With the structure of the conventional main control valve hole 7 and the main control valve 8, it is difficult to rotate the main control valve 8 in the vertical direction, that is, in the forward and reverse directions of the motor 15. However, since the orifice structure is different between the forward and reverse directions, when controlling the flow rate and temperature by rotating the motor 15 in the forward and reverse directions, there will be a difference in the flow rate temperature characteristics, and the It was difficult to control by

The present invention solves the above problems, and aims to provide a fluid control valve device that can control flow rates at two locations with one fluid control valve, and provides equal temperature and flow rate control characteristics in both forward and reverse directions. There is.

Means for Solving the Problems In order to achieve the above object, the fluid control valve device of the present invention has the following features:
A valve body having a fluid inlet and an outlet, a primary pressure chamber in which the inlet is provided, a secondary pressure chamber in which the outlet is provided, and a communication portion that communicates the primary pressure chamber and the secondary pressure chamber. and a valve body that moves in the forward and reverse directions within this communication section and adjusts the flow rate at two locations, and the communication section is a reduced conical flow path section whose flow path area gradually decreases downstream from the primary pressure chamber. The valve body is composed of a cylindrical flow path portion having a constant flow path area from this reduced conical flow path portion, and an enlarged cone portion whose cross-sectional area gradually increases downstream from the primary pressure chamber; The valve body is composed of an enlarged conical part and a cylindrical part having a constant cross-sectional area, and the conical angle of the reduced conical flow path part of the communication part is the same as the conical angle of the enlarged conical part of the valve body. There is.

Operation The fluid control valve device of the present invention has the above-described configuration, so that when fluid flows from the primary pressure chamber side to the secondary pressure chamber side, the angle formed by the reduced conical flow path portion of the communication portion and the cylindrical flow path portion is Since the angle formed by the enlarged conical portion of the valve body and the cylindrical portion are the same, the temperature flow rate control characteristics can be made equal in the forward and reverse directions.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1, 2, and 3.

As shown in the figure, the valve body 23 is provided with an inlet 24, and a water amount sensor 25 for detecting the water amount is provided at the front stage of the inlet 24.
A heat exchanger 26 is provided. Two outlets are provided: a hot water outlet 27 and a bath hot water outlet 28.

The hot water outlet 27 is connected to a faucet 29. The valve body 23 includes a primary pressure chamber 30 connected to the inlet 24, a secondary pressure chamber 31 having two outlets 27 and 28, and a communication section 32 that communicates the primary pressure chamber 30 and the secondary pressure chamber 31. It is constituted by a valve body 33 that moves in the forward and reverse directions within this communication portion 32 and adjusts the flow rate at two locations. The communication portion 32
is composed of a reduced conical flow path section 34 whose flow path area gradually decreases downstream from the primary pressure chamber 30, and a cylindrical flow path section 35 whose flow path area is constant from this reduced conical flow path section 34, and a one-way valve. body 33
is composed of an enlarged conical part 36 whose cross-sectional area of the valve body gradually expands downstream from the primary pressure chamber 30, and a cylindrical part 37 whose cross-sectional area of the valve body is constant from this enlarged conical part 36, and a communicating part 32.
The angle 38 formed by the reduced conical flow path portion 34 and the cylindrical flow path portion 35
and the angle 39 formed by the enlarged conical portion 36 of the valve body 33 and the cylindrical portion.
and are at the same angle. The valve body 33 is connected to a piston 40, and this piston 40 has a secondary pressure chamber 30.
An introduction hole 42 is provided for introducing the pressure into the pressure chamber 41 to maintain pressure balance. Furthermore, hot water supply outlet 28 for the bath
An on-off valve 43 for controlling the supply of hot water to the bath is provided inside the on-off valve 43, and a valve body 45 biased by a spring 44 is provided inside the on-off valve 43. The valve body 45 is opened by a shaft body 46, and this shaft body 46 is connected to the valve body 33. In addition, the inlet water temperature thermistor 4 is connected to the m controller 47.
8. Signals from the hot water temperature thermistor 49, the controller 50, and the water flow sensor 25 are input, and the objects to be controlled include the gas control valve 53 that controls the motor 51 and the burner 52.

To explain the operation in the configuration described above, as shown in FIG. 1, when the valve body 33 is located at the center of the cylindrical flow path section 35 of the communication section 32, the on-off valve 43 is closed and the hot water supply outlet for the bath is closed. 28 is closed. At this time, the amount of hot water dispensed is the most limited, and hot water is dispensed only from the hot water supply outlet 27.

When controlling the amount of hot water coming out of the hot water supply outlet 27, the valve body 33 moves to the primary pressure chamber 30 of the communication portion 32, as shown in FIG. At this time, the on-off valve 43 remains closed and the bath hot water supply outlet 28 remains closed. Further, the amount of hot water discharged from the hot water supply outlet 27 is controlled by the reduced conical flow path portion 34 of the communication portion 32 and the corner 37a of the cylindrical portion 37 of the valve body 33.

Next, when controlling the amount of hot water coming out of the hot water supply outlet 28 for the bath, the valve body 33
1, the shaft body 46 connected to the valve body 33 pushes the on-off valve 43 and opens the hot water supply outlet 28 for the bath.

Further, the amount of hot water discharged from the bath hot water supply outlet 28 is controlled by the corner 35a of the cylindrical flow path portion 35 of the communication portion 32 and the enlarged conical portion 36 of the valve body 33. Here, hot water can be supplied to the bath only when the faucet 29 is closed. That is, there is no hot water coming out from the hot water supply outlet 27.

As described above, according to the flow control valve device of the embodiment of the present invention,
The angle 38 formed by the reduced conical flow path portion 34 and the cylindrical flow path portion 35 of the communication portion 32 and the cone angle 39 of the enlarged conical portion 36 of the valve body 33
Since they are set at the same angle, the same temperature flow characteristics can be obtained in both forward and reverse directions.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the communication portion of the valve body is formed with a reduced conical flow path portion whose flow path area gradually decreases downstream from the primary pressure chamber. It consists of a conical flow path section and a cylindrical flow path section with a constant flow path area, while the valve body has one
It is composed of an expanding conical part whose cross-sectional area of the valve body gradually increases downstream from the next pressure chamber, and a cylindrical part whose cross-sectional area of the valve body is constant from this expanding conical part, and a contracting conical flow path part of the communication part. Since the angle formed by the cylindrical flow path section and the angle formed by the enlarged conical section of the valve body and the cylindrical section are the same, when fluid flows from the primary pressure chamber side to the secondary pressure chamber side. It is possible to obtain the same temperature and flow rate control characteristics in both the forward and reverse directions, and furthermore, since it is not necessary to change the speed of the motor in proportion to the speed of the motor in order to control the fluid control valve, it is possible to simplify the circuit.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of a fluid control valve device showing one embodiment of the present invention, FIGS. 2 and 3 are enlarged sectional views of the same part, and FIG.
The figure is a longitudinal sectional view of a conventional fluid control valve device. 24...Entrance, 27.28...Exit,
23...Valve body, 30...Primary pressure chamber, 31...Secondary pressure chamber, 32...Communication section, 33...・Valve body, 34... Reduced conical flow path section, 35... Cylindrical flow path section, 36...
・Enlarged conical portion, 37...Cylindrical portion, 38, 39・
...cone angle.

Claims (1)

[Claims] A valve body having a fluid inlet and an outlet, a primary pressure chamber in which the inlet is provided, a secondary pressure chamber in which the outlet is provided, and communication that communicates the primary pressure chamber and the secondary pressure chamber. and a valve body that moves in the forward and reverse directions within the communication section and adjusts the flow rate at two locations, and the communication section has a contracting conical flow whose flow path area gradually decreases downstream from the primary pressure chamber. and a cylindrical flow path portion having a constant flow path area from the contracted conical flow path portion, while the valve body is an expanding cone whose cross-sectional area gradually increases downstream from the primary pressure chamber. and a cylindrical portion having a constant cross-sectional area from the enlarged conical portion to the valve body, and the angle formed by the reduced conical flow path portion of the communication portion and the cylindrical flow path portion, and the angle formed by the cylindrical flow path portion of the valve body A fluid control valve device in which the angle formed by the enlarged conical portion and the cylindrical portion is the same.