JPH0237513B2 - YUMIZUKONGOSOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water mixing device for mixing hot water and water to obtain hot water at a predetermined temperature.

Conventional configuration and its problems Conventionally, this type of hot water mixing device has a configuration as shown in FIG. That is, in FIG. 1, the valve shaft 1 is moved forward and backward by the drive of a servo motor 1'. 2 is a double-sided valve on the hot water side that adjusts the amount of hot water, and the double-sided valve 2 on the hot water side is connected to the throttle hole 3.
and is fixed to the tip of the valve shaft 1. 4
is a single-sided valve on the water side that adjusts the amount of cold water, and a spring 5 is interposed between it and the double-sided valve 2 on the hot water side.
In contrast, it is movable only in the direction of the hot water side double-sided valve 2. Further, 6 is one hot water side sheet formed at the outlet of the hot water supply path 8 in the hot water side valve chamber 7, and 9 is the other hot water side sheet formed in the hot water side valve chamber 7 opposite to the hot water side sheet 6. In the sheet, the hot water side sheet 9 is
Further, it is arranged between the hot water side valve chamber 7 and a mixing chamber 11 to be described later. The hot water side double-sided valve 2 is installed between these two hot water side seats 6 and 9, and as the valve shaft 1 moves back and forth, the hot water side double-sided valve 2 comes into contact with and separates from the two hot water side seats 6 and 9 in opposite ways. They are in a relationship, and the opening degree of each can be adjusted. 1
0 is a water side seat formed at the outlet of the water supply channel 12 in the mixing chamber 11 which also serves as a water side valve chamber, and the water side single-sided valve 4 comes into contact with this water side seat 10 by moving the valve shaft 1 back and forth. It is designed to change and adjust its opening by releasing it. Note that a pressure reducing valve 15 is connected to the hot water supply path 8.
The water that has been depressurized is heated in the heat exchanger 14 of the water heater and then supplied. The water supply channel 12 and the hot water supply channel 8 branch after the pressure reducing valve 15, and therefore there is no large difference in pressure between the water supply channel 12 and the hot water supply channel 8.

As for the operation of this conventional example, first, when the valve stem 1 reaches the left limit position and the double-sided valve 2 on the hot water side, which is integrated with the valve stem 1, contacts the hot water side seat 6 and closes the hot water supply path 8, high-temperature hot water from the hot water supply path 8 is released. A certain minimum amount of water flows into the mixing chamber 11 only through the throttle hole 3 formed in the double-sided valve 2 on the hot water side. On the other hand, the water side single-sided valve 4 has a water side seat 10.
It is sufficiently far away from the water supply channel 12 and its opening is at its maximum, allowing a large amount of cold water from the water supply channel 12 to flow into the mixing chamber 11, thereby producing hot water at the lowest temperature. Next, when the valve stem 1 moves to the right and the double-sided valve 2 on the hot water side is located between the hot water side seats 6 and 9, the opening degree of the double-sided valve 2 on the hot water side becomes the maximum, and the opening degree of the single-sided valve 4 on the water side becomes the maximum. The temperature decreases and hot water comes out at a medium temperature. When the valve stem 1 is further moved to the right, the hot water side double-sided valve 2 approaches the hot water side seat 9 and its opening is reduced, and the water side single-sided valve 4 comes into contact with the water side seat 10 and is fully closed. Take a bath. If the amount of hot water that comes out is large and exceeds the capacity of the water heater, and the water passes through the water heater 14, the temperature of the hot water will drop, so the valve stem 1 moves further to the right, and the double-sided valve 2 on the hot water side closes to the spring 5. The double-sided valve 2 on the hot water side contacts the hot water side seat 9 and closes it, and the water side seat is also kept fully closed to allow a small amount of water to flow only from the throttle hole 3. Hot water is supplied at maximum temperature. Here, the role of the throttle hole 3 is that when the sensed temperature is extremely low compared to the set temperature, the servo motor moves to the right and fully closes both the hot water side and the water side, but if there is no throttle hole 3 , mixed hot water outlet 13
This prevents a situation where the temperature sensed by the outlet hot water temperature sensor installed in the facility remains low and does not return to normal.

Since the conventional hot water mixing device was constructed as described above, it had the following drawbacks.

(1) Because there is a throttle hole, even if the water side can be closed, the hot water side cannot be completely closed. The hot water leaking from the tank mixed with the water, making it impossible to tap the hot water at the lowest temperature (water temperature).

(2) Two hot water side seats are required, and the hot water side double-sided valve needs to have a throttle hole, and the body must be assembled between the two hot water side sheets and between the water side sheet and the hot water near the water side seat. The structure and processing were complicated, as it required a three-part structure between the side sheets.

(3) When the double-sided valve on the hot water side moves to the right and overstrokes and comes into contact with the hot water side seat 9, there is no means to cushion the contact, so abnormal force is applied to the shaft and servo motor, causing a problem in durability. It was hot.

Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, and aims to provide a hot water mixing device that can completely close the hot water side, has a simplified structure, and has improved durability. shall be.

Structure of the Invention In order to achieve this object, the present invention includes a valve body,
A hot water side flow path, a water side flow path, a mixing flow path provided in this valve frame, a hot water side valve seat, a water side valve seat, a valve shaft, and a hot water side valve body provided on this valve shaft. The water side valve body is attached to the valve shaft and configured to be able to be inserted into a water flow regulating valve seat provided in the hot water side flow path, and as the hot water side valve body moves away from the hot water side valve seat, the hot water side flow A flow regulating valve that restricts the flow area of the channel to a certain range and expands the flow area as it gets closer, and a drive means that drives the valve stem are provided, and the hot water side is controlled by moving the valve stem back and forth in the axial direction. The relationship of the hot water side valve body to the valve seat and the relationship of the water side valve body to the water side valve seat are reversed, and the mixing function of hot water and hot water and the ability to produce hot water in large quantities exceed the capacity of the hot water heat source machine. In such cases, this mixing device also has the function of reducing the amount of hot water to prevent a drop in temperature, making it possible to dispense hot water at the lowest temperature with a simplified configuration, and increasing durability.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 to 8.

FIG. 2 shows a hot water supply system using an embodiment of a hot water mixing device. Water supplied through the water supply 21 is depressurized by the pressure reducing valve 22 and sent to the heat source device 23 . The water heated by this heat source device 23 becomes hot water and is led to a hot water mixing device 25 through a hot water supply pipe 24. On the other hand, the water supply pipe 26 branched after the pressure reducing valve 22
The water is also led to the hot water mixing device 25. The mixed hot water mixed by the hot water mixing device 25 is transferred to the mixed hot water supply pipe 27.
through which it is led to the faucets 28, 29 of the terminal. A temperature setting device 30 is provided near the faucet 29,
It is configured so that the required hot water temperature can be set here and a signal can be transmitted to the controller 31 of the hot water mixing device.

FIG. 3 is a detailed diagram of the hot water mixing device 25.

Hot water side flow path 3 through which hot water supplied from the heat source material 23 passes
2, a water side flow path 33 through which water passes, a mixing flow path 34 where hot water and water are mixed, a hot water side valve seat 35 provided within the hot water side flow path 32, and a water side flow path 33 provided within the water side flow path 33. A water side valve seat 36 is provided within the valve frame body 37.

The valve shaft 38 is provided with a hot water side valve body 40 and a water side valve body 41 which are biased in directions away from each other by a spring 39 and are pressed against stoppers attached on both sides. The hot water side valve body 40 is configured to be able to penetrate into the flow regulating valve seat 32' in the hot water side flow path 32, and as the hot water side valve body moves away from the hot water side valve seat 35, the flow path area is reduced to a certain range. A flow rate regulating valve 42 is integrally provided, which throttles the flow rate up to the point where the flow rate reaches, and widens the flow path area as it gets closer. The outer diameter of the flow rate regulating valve 42 is smaller than the inner diameter of the flow rate regulating valve seat 32', and it is inserted through the flow regulating valve seat 32'. It can be assembled by simply inserting it into the channel 32. Also, body 3
7 has a two-part structure that is divided near the hot water side valve seat 35. The valve shaft 38 is driven by a motor 4 which is a driving means.
3, the valve shaft is configured to be able to move forward and backward in the axial direction of the valve shaft via a gear box 44 and a screw 45 which is a linear motion conversion mechanism. A thermistor 46 detects the temperature of the mixed water, and a control circuit 47 controls the drive of the motor 43 according to the temperature deviation from the temperature setting device 30, and moves the valve shaft to a position where the temperature deviation disappears.

48 and 49 are micro switches for detecting the position of the valve stem.

Next, the operation of the present invention will be explained. FIG. 4 shows that the hot water side valve body 40 and the water side valve body 41 are connected to the respective valve seats 3.
5, 36, indicating a state where hot water and water are mixed appropriately and hot water is dispensed at a medium temperature. If the set temperature is changed and the maximum temperature is required, the temperature deviation between the temperature setting device 30 and thermistor 46 will increase, so the motor 43 is driven via the control circuit 47.
The valve stem 38 moves to the left. And as shown in Figure 5,
The water side valve body 41 is in contact with the water side valve seat 36, the hot water side valve body 40 is separated from the hot water side valve seat 35, and the flow rate regulating valve 42 also maintains the flow rate regulating valve seat 32' at an appropriate flow area and reaches the maximum temperature. Make a hot spring. Further, in this state, if the faucet of the terminal is opened further and a large flow of water flows, the heating capacity of the heat source device 23 is limited, so the temperature cannot be maintained as set and the temperature of the hot water drops. The thermistor 46 detects this, and the shaft 38 moves further to the left in order to throttle the flow rate, and the spring 39 is compressed as shown in FIG.
2 to reduce the flow rate. The flow rate regulation valve 42 is inserted through the flow rate regulation valve seat 32', and the outer diameter of the flow rate regulation valve is smaller than the inner diameter of the flow rate regulation valve seat 32'. Even if the hot water side valve body 40 overstrokes, it will not come into contact with the valve seat unlike the conventional valve body.
In addition, since the flow rate regulating valve 42 is inserted through the flow rate regulating valve seat 32', there is a gap between the two, and by setting this gap appropriately, even when the valve is moved to the left at its maximum, there is a gap between the two. It allows hot water to flow through it and can replace the traditional throttle hole.
When the minimum temperature is specified, the shaft 38 moves to the right as shown in FIG. The valve body 41 is separated from the water side valve seat 36, and only water flows into the mixing flow path 34. At this time, the hot water side valve body 40 does not have a conventional throttle hole, and the hot water side valve seat 35 has no hot water side valve body 40.
Since hot water does not flow from the hot water side flow path 32 due to the contact with the hot water, hot water can be discharged at the lowest temperature.

FIG. 8 shows the relationship between the stroke of the valve shaft 38, the amount of hot water, and the change in the amount of water, as explained above.

In this embodiment, the hot water side valve body 40 and the water flow rate regulating valve 42 are shown as being integrally constructed, but it is also possible to construct them separately and attach them to the shaft 38 one after the other. Further, only the hot water side valve body 40 and the water side valve body 41 are biased in the direction of separation by the spring 39, and the flow rate regulating valve 42 is biased in the left direction by a separate spring, so that the hot water side valve body 40
It is also possible to have a configuration in which the

In this embodiment, since the hot water side valve body 40 and the flow rate regulating valve 42 are integrally constructed, the number of parts can be reduced, and other special springs and the like are not required.

Effects of the Invention The present invention has a hot water side valve body and a water side valve body that are provided on a valve shaft so as to be biased in directions away from each other, and a hot water side valve body that is inserted through a flow rate regulating valve seat and interlocks with the hot water side valve body. Since it is composed of a flow rate regulating valve that adjusts the movement and flow path area of the flow rate regulating valve seat, it has the following effects.

(1) Since there is no restriction hole in the hot water side valve body like in the past, the hot water side is fully closed and the water side is fully open. water temperature).

(2) Only one valve seat on the hot water side is required, no restriction hole is required,
The body has a two-part structure, making it easy to construct and easy to process.

(3) Even if the hot water side valve body overstrokes when regulating the flow rate, since the flow rate regulating valve is inserted through the hot water side flow path, it will not lock and cause abnormal force to the motor or shaft like in the past. There is no problem with durability.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional hot water mixing device, Fig. 2 is a diagram of a hot water supply system using the hot water mixing device according to an embodiment of the present invention, and Fig. 3 is a diagram showing an embodiment of the hot water mixing device of the present invention. 4 to 7 are diagrams for explaining the operation of the hot water/water mixing device, and FIG. 8 is a characteristic diagram showing the relationship between the valve shaft stroke and flow rate of the hot water/water mixing device. 32...Hot water side flow path, 32'...Flow rate regulating valve seat,
33...Water side channel, 34...Mixing channel, 35...
Hot water side valve seat, 36... Water side valve seat, 38... Valve stem, 3
9... Spring, 40... Hot water side valve body, 41... Water side valve body, 42... Flow rate regulating valve, 43... Motor (driving means).

Claims (1)

[Scope of Claims] 1. A valve body, a hot water side passage provided within the valve body through which hot water supplied from a hot water machine passes, a water side passage through which water passes, and a confluence of hot water and water. A mixing flow path through which mixed hot water passes, a hot water side valve seat provided in the hot water side flow path, a water side valve seat provided in the water side flow path, a valve stem, and a hot water side valve seat provided in the water side flow path. A side valve body, a water side valve body, and a water side valve body are attached to the valve shaft and configured to be able to be inserted into a flow rate regulating valve seat provided in the hot water side flow path, and the hot water side valve body is configured to be able to penetrate from the hot water side valve seat. a flow rate regulating valve that restricts the flow area of the hot water side flow path to a certain range when the hot water side valve body moves away from the hot water side flow path, and expands the flow path area when the hot water side valve body approaches the hot water side valve seat; and a driving means that drives the valve shaft; A hot water mixing device in which the relationship of the hot water side valve body to and away from the hot water side valve seat and the relationship of the water side valve body to the water side valve seat are opposite to each other due to the forward and backward movement of the valve stem in the axial direction. 2. The hot water mixing device according to claim 1, in which the hot water side valve body and the flow rate regulating valve are integrated.