JPH07260020A - Hot water and water mixing valve - Google Patents

Abstract

PURPOSE:To enable hot water to be well supplied in the little fluctuation of the hot water temperature by enabling hot water and water to be reliably mixed to each other at an optional mixing ratio. CONSTITUTION:A plurality of flow control parts 6a, 6b of a valve body 7 provided with a body part 12 for forming a mixing chamber 11 for mixing hot water to water passed through the flow control parts 6a, 6b between the flow control parts 6a, 6b housed in a valve body 4, for forming gaps 5a, 5b between the valve body 4 and them, for making hot water or water pass the gaps 5a, 5b, and for controlling the flow rate and the valve body 4 are respectively arranged on the hot water side on one end side and the water side on the other end side facing the hot water side. And the flow control parts 6a, 6b of the valve body 7 are formed into a shape having the specific inclination to inner peripheral surfaces (valve seat parts) 4a, 4b of the valve body 4, so that the gaps 5a, 5b formed between the flow control parts 6a, 6b and the valve body 4 may be narrowed toward the downstream side of water or hot water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water mixing valve, and in particular, it is meaningful when used in a water heater that mixes hot water and water at a predetermined ratio to supply hot water adjusted to a predetermined temperature. Regarding the mixing valve.

[0002]

2. Description of the Related Art As one of the methods for supplying hot water at a predetermined temperature in a water heater, hot water discharged from a heat exchanger and water are mixed at a predetermined ratio and adjusted to an arbitrary temperature. There is a method of supplying hot water, and various hot and cold water mixing valves are used for that purpose.

However, in the conventional hot and cold water mixing valve, the hot and cold water mixing ratio is not always sufficient when the hot and cold water temperature is controlled, and the temperature of the hot water to be supplied fluctuates little by little. There is a problem. Further, when such a hot and cold water mixing valve is incorporated in a water heater, there is a problem that it is difficult to accurately perform feedback control.

[0004]

2. Related Art FIG. 5 is a front sectional view showing a structure of a hot and cold water mixing valve to which the present invention relates, and FIG. 6 is a view showing a valve body used in the hot and cold water mixing valve, and FIG. Figure,
(b) is a front view and (c) is a right side view.

This hot and cold water mixing valve is a hot water supply port 51 for supplying hot water, a water supply port 52 for supplying water, and a hot water for discharging hot water adjusted to a predetermined temperature by mixing hot water with water inside. In the valve body 54 with the discharge port 53,
It is formed by housing the valve body 57.

The valve body 57 forms gaps 55a and 55b between itself and the valve body 54, and the gaps 55a and 5b are formed.
A mixing chamber 61 that mixes the hot water and the water that has passed through the flow rate control units 56a and 56b is formed between the valve body 54 and the flow rate control units 56a and 56b that pass the hot water or water through the 5b and control the flow rate thereof. And a body portion 62 to be formed.

A plurality of hot water flow rate control units 56a and a plurality of water flow rate control units 56b are provided on each end of the valve body 57 facing each other (three). That is, the valve body 57 has the valve body 57 on both sides of the valve body 57.
The rod-shaped guide 6 is held so that it can be held at a predetermined position within 4.
Three 3a and 63b are formed at intervals of 120 ° in the circumferential direction, and the portions sandwiched by the guides 63a and 63b are flow rate control sections 56a and 56b.

Further, the hot and cold water mixing valve has a valve body 5
A flow rate adjusting screw 58 for adjusting the flow rate of hot water and water by moving 7 in the axial direction and an electric motor 59 for rotating the flow rate adjusting screw 58 are provided.
Are held by the screw holder 60.

In this hot and cold water mixing valve,
The hot water and the water supplied from the hot water supply port 51 and the hot water supply port 52 serve as inner peripheral surfaces (valve seat portions) 54 a, 54 of the valve body 54.
b into the mixing chamber 61 through the gaps 55a and 55b formed between the flow control portions 56a and 56b of the valve body 57, and the mixed water is mixed in the mixing chamber 61 from the hot water outlet 53 as hot water of a predetermined temperature. Is discharged.

When controlling the hot water temperature, the electric motor 59 is used to rotate the flow rate adjusting screw 58 to move the valve body 57 which is interlocked therewith in the axial direction.
A gap 55 formed between the flow rate control portions 56a and 56b and the inner peripheral surfaces (valve seat portions) 54a and 54b of the valve body 54.
It is performed by changing the size of a and 55b and adjusting the mixing ratio of hot water and water.

However, even in the above hot and cold water mixing valve, the hot and cold water mixing state is not always sufficient when the hot water temperature is controlled by changing the hot and cold water mixing ratio, and a hot and cold water mixing valve with high mixing efficiency is required. There is.

The present invention provides a hot and cold water mixing valve capable of reliably mixing hot water and water at an arbitrary mixing ratio and capable of stably supplying hot water having a small fluctuation range of hot water temperature. With the goal.

[0013]

In order to achieve the above object, a hot and cold water mixing valve of the present invention has a hot water supply port to which hot water is supplied, a water supply port to which water is supplied, and hot water and water inside. And a valve body having a hot water outlet for discharging hot water adjusted to a predetermined temperature, and a hot water discharge port is housed in the valve body and forms a gap between the valve body and the hot water. Alternatively, a flow rate control unit that allows water to pass therethrough and controls the flow rate thereof, and a valve body having a body portion between the valve body and a mixing chamber that forms a mixing chamber for mixing the hot water and the water that have passed through the flow rate control unit. And, the flow rate control unit,
A plurality of water flows are provided on each of the hot water side on one end side and the water side on the other end side facing the hot water side, and a flow rate control unit of the valve body is provided between the flow rate control unit and the valve body. Characterized by a shape having a predetermined inclination with respect to the inner peripheral surface (valve seat portion) of the valve body so that the formed gap becomes narrower toward the downstream side of water or hot water passing through the gap. And

Further, the flow control unit on the hot water side and the flow control unit on the water side of the valve body are arranged such that their phases are shifted so as not to face each other.

[0015]

[Function] The gap formed between the flow rate control portion of the valve body housed in the valve body and the inner peripheral surface (valve seat portion) of the valve body becomes narrower toward the downstream side of water or hot water. In addition, the flow rate control part has an inner peripheral surface (valve seat part) of the valve body.
Since it is formed in a shape having a predetermined inclination with respect to (i.e., is tapered), the hot water and the water that have passed through the respective flow rate control units are sufficiently mixed to achieve uniform mixing. .

Further, by arranging the hot water-side flow rate control unit and the water-side flow rate control unit of the valve body so as not to face each other, the hot water flow rate and the water flow rate can be more surely mixed,
A more uniform mixing is achieved.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front sectional view showing a schematic configuration of a hot and cold water mixing valve to which the present invention relates, FIG. 2 is a view showing a valve body used in the hot and cold water mixing valve, and (a) is a left side view,
(b) is a front view and (c) is a right side view.

As shown in FIGS. 1 and 2, the hot and cold water mixing valve of this embodiment has a hot water supply port 1 to which hot water is supplied, a water supply port 2 to which water is supplied, and hot water and water mixed inside. The valve body 7 is formed by accommodating the valve body 7 in a valve body 4 having a hot water discharge port 3 through which hot water adjusted to a predetermined temperature is discharged.

The valve body 7 has gaps 5a and 5b formed between it and the valve body 4, and flow rate control units 6a and 6b for controlling the flow rate of hot water or water passing through the gaps 5a and 5b. And a body 12 that forms a mixing chamber 11 that mixes the hot water and the water that has passed through the flow rate control units 6a and 6b with the valve body 4.

Also, on both ends of the valve body 7, rod-shaped guides 13a and 13b are arranged at intervals of 120 ° in the circumferential direction so that the valve body 7 is held at a predetermined position in the valve body 4. Each of the guides 13a and 13b is formed with three guides.
The portions sandwiched between the two are three flow rate control units 6a and 6b on the hot water side and the water side, respectively.

The hot water-side and water-side flow rate control units 6a and 6b, each of which is provided in threes, respectively,
A gap 5 formed between a and 6b and the valve body 4
The a and 5b are shaped to have a predetermined inclination with respect to the inner peripheral surfaces (valve seat portions) 4a and 4b of the valve body 4 so as to become narrower toward the downstream side of water or hot water. In this embodiment, the flow rate control units 6a and 6b are the valve bodies 7
It is formed by tapering the shoulder portion of the.

Further, the hot water side flow rate control unit 6a and the hot water side flow rate control unit 6b are arranged out of phase so that they do not face each other. In this embodiment, the hot water flow rate control unit is controlled. The portion 6a and the water-side flow rate control portion 6b are out of phase with each other by 60 ° in the circumferential direction.

Further, the hot and cold water mixing valve of this embodiment includes
A flow rate adjusting screw 8 for adjusting the flow rate of hot water and water by moving the valve body 7 in the axial direction and an electric motor 9 for rotating the flow rate adjusting screw 8 are provided, and the flow rate adjusting screw 8 is a screw holder. Held by 10.

In this hot and cold water mixing valve,
Hot water and water supplied from the hot water supply port 1 and the water supply port 2 were formed between the inner peripheral surfaces (valve seat portions) 4a and 4b of the valve body 4 and the flow rate control units 6a and 6b of the valve body 7. Gap 5a, 5b
After passing through, the mixture enters the mixing chamber 11, is mixed in the mixing chamber 11, and is discharged from the hot water outlet 3 as hot water having a predetermined temperature.

When the hot water temperature is controlled, the electric motor 9 is used to rotate the flow rate adjusting screw 8
The valve body 7 interlocking with this is moved in the axial direction, and the flow rate control units 6a and 6b and the inner peripheral surface (valve seat portion) 4 of the valve body 4 are moved.
This is performed by changing the size of the gaps 5a and 5b formed between the a and 4b and adjusting the mixing ratio of hot water and water.

In the hot and cold water mixing valve of this embodiment,
The flow rate control unit 6 of the valve body 7 housed in the valve body 4
A gap 5 formed between a and 6b and the valve body 4
A shape in which the flow rate control portions 6a and 6b have a predetermined inclination with respect to the inner peripheral surfaces (valve seat portions) 4a and 4b of the valve body 4 so that a and 5b become narrower toward the downstream side of water or hot water. Since each of the flow rate control units 6 is formed on the
The hot water and water that have passed through a and 6b are sufficiently mixed to achieve uniform mixing.

Further, the flow rate control section 6a on the hot water side of the valve body 7 is provided.
Since the flow rate control section 6b on the water side and the water side are arranged with their phases shifted so as not to face each other, the hot water and the water are more surely mixed, and more uniform mixing can be realized.

In the above embodiment, the case where the valve body 7 in which the hot water flow rate control unit 6a and the water flow rate control unit 6b are arranged with their phases shifted so that they do not face each other is used. As described above, as shown in FIG. 3, the valve body 7 is arranged so that the hot water flow rate control unit 6a and the water flow rate control unit 6b are arranged so as to face each other without any particular phase shift. Even when it is used, it is possible to obtain the mixing efficiency according to the hot and cold water mixing valve of the above embodiment.

The flow rate control unit described in the related art is arranged so that the gap formed between the flow rate control unit and the valve body becomes narrower toward the downstream side of water or hot water. A hot and cold water mixing valve that is not shaped to have a predetermined inclination with respect to the inner peripheral surface (valve seat portion) (comparative example)
Table 1 shows the fluctuation range of the hot water temperature when hot water mixing is performed using (FIG. 5) and the hot water temperature fluctuation range when hot water mixing is performed using the hot water mixing valve of the above embodiment. The fluctuation range of the hot water temperature in Table 1 was such that hot water of 75 ° C. and water of 5 ° C. were mixed at various mixing ratios to obtain hot water having a hot water temperature of about 25 to 60 ° C. (hot water after mixing). This is the fluctuation range of the hot water temperature.

[0030]

[Table 1]

In the comparative example of Table 1, "when the phase of the flow rate control unit is not shifted" means that the phases of the flow control unit on the hot water side and the flow control unit on the water side are not particularly shifted.
The case where the hot and cold water mixing valves are arranged so that they face each other is shown, and "when the phase of the flow rate control unit is shifted"
Is the phase of the flow control unit on the hot water side and the flow control unit on the water side.
The figure shows the case where hot and cold water mixing valves arranged at 0 ° are used.

From Table 1, in the hot and cold water mixing valve of the comparative example, the fluctuation range of the hot water temperature is 1.5 ° C. when the phases of the hot water side flow rate control unit and the water side flow rate control unit are not shifted. In contrast to the case where the fluctuation range of the hot water temperature is 1.2 ° C., in the hot and cold water mixing valve of the embodiment, the phases of the hot water flow control unit and the water flow control unit are not shifted. The fluctuation range of the hot water temperature is 0.8 ° C., and the fluctuation range of the hot water temperature when the phase is shifted is 0.4 ° C. By using the hot and cold water mixing valve of the example, the fluctuation range of the hot water temperature is the hot water temperature of the comparative example. It can be seen that it is less than half that when the mixing valve is used.

FIG. 4 is a diagram showing an example of a water heater using the hot and cold water mixing valve of the present invention. This water heater
A heat exchanger 21 for heating water, a water supply thermistor 22 and a water amount sensor 23 arranged on the inlet side of the heat exchanger 21,
Hot water supply thermistor 2 arranged on the outlet side of the heat exchanger 21
4, a hot and cold water mixing valve 25, a total water amount valve 26 and a mixing thermistor 27. The hot water from the heat exchanger 21 and the cold water supplied from a bypass 28 branched from the downstream of the water supply thermistor 22. Is a water heater which mixes water with a hot water mixing valve 25 to supply hot water at a predetermined temperature. As the hot and cold water mixing valve 25 of this water heater,
By using the hot and cold water mixing valve of the present invention (for example, the hot and cold water mixing valve of the above-mentioned embodiment), the hot water from the heat exchanger 21 and the cold water supplied through the bypass 28 are reliably mixed, and the hot water supply temperature is controlled. It is possible to supply hot water with a small fluctuation range.

In the above embodiment, three guides 13a and 13b are provided at both ends of the valve body 7, and three flow rate control units 6a or 6b are provided between the guides on both the hot water side and the water side. Although the case has been described, in the hot and cold water mixing valve of the present invention, the number of flow rate control units is not limited to three, and other numbers may be used. Further, the flow rate control unit does not necessarily have to be provided between the guides, and other arrangement modes are possible.

The present invention is not limited to the above embodiment in other respects, and the specific shapes of the valve body and the valve seat portion thereof, or the hot water supply port, the water supply port, and the hot water discharge port are not limited thereto. Within the scope of the invention, the arrangement position, the specific shape of the flow rate control unit, the number of the flow rate control units, the size of the deviation between the hot water flow control unit and the water flow control unit when the phases are shifted In, various applications and modifications can be added.

[0036]

As described above, in the hot and cold water mixing valve of the present invention, the flow rate control part of the valve body is provided with a gap formed between the flow rate control part and the valve body on the downstream side of water or hot water. Inner peripheral surface of the valve body (valve seat part) so that it becomes narrower toward you
Since the shape has a predetermined inclination with respect to, the hot water and the water that have passed through the flow rate control unit are sufficiently mixed and uniform mixing is realized.

Furthermore, by arranging the hot water-side flow rate control unit and the water-side flow rate control unit of the valve body so as not to face each other, the hot water and the water are mixed more reliably,
It becomes possible to achieve more uniform mixing.

Therefore, by using the hot and cold water mixing valve of the present invention in the hot water supply device, it is possible to perform good hot water supply with a small fluctuation range of the hot water supply temperature.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a schematic configuration of a hot and cold water mixing valve according to an embodiment of the present invention.

FIG. 2 is a diagram showing a valve body used in a hot and cold water mixing valve according to an embodiment of the present invention, in which (a) is a left side view,
(b) is a front view and (c) is a right side view.

3A and 3B are views showing a valve body constituting a hot and cold water mixing valve according to another embodiment of the present invention, wherein FIG. 3A is a left side view, and FIG.
Is a front view and (c) is a right side view.

FIG. 4 is a diagram showing a configuration of a water heater using the hot and cold water mixing valve according to the embodiment of the present invention.

FIG. 5 is a front sectional view showing a schematic configuration of a hot and cold water mixing valve related to the present invention.

6A and 6B are views showing a valve body used in a hot and cold water mixing valve related to the present invention, wherein FIG. 6A is a left side view, FIG. 6B is a front view, and FIG.

[Explanation of symbols]

 1 Hot Water Supply Port 2 Water Supply Port 3 Hot Water Discharge Port 4 Valve Body 4a, 4b Inner Peripheral Surface (Valve Seat) 5a, 5b Gap 6a, 6b Flow Control Unit 7 Valve Body 8 Flow Control Screw 9 Electric Motor 10 Screw holder 11 Mixing chamber 12 Body 13a, 13b Guide

[Procedure amendment]

[Submission date] June 13, 1995

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

Claims (2)

[Claims] 1. A hot water supply port for supplying hot water, a water supply port for supplying water, and a hot water discharge port for discharging hot water adjusted to a predetermined temperature by mixing hot water with water inside. A valve body including a valve body, a flow rate control unit that is housed in the valve body, forms a gap between the valve body, and allows hot water or water to pass through the gap and controls the flow rate thereof; And a valve body having a body that forms a mixing chamber for mixing the hot water that has passed through the flow rate control unit with water, and the flow rate control unit includes one end side of the hot water side, A plurality of flow control units of the valve body are provided on each of the water sides of the other end opposite to the hot water side, and a gap formed between the flow control unit and the valve body is the gap. Inside the valve body so that it becomes narrower toward the downstream side of the water or hot water passing through A hot and cold water mixing valve having a shape having a predetermined inclination with respect to a peripheral surface (valve seat portion). 2. The hot and cold water mixing valve according to claim 1, wherein the hot water flow control unit and the water flow control unit of the valve body are arranged such that their phases are offset from each other so as not to face each other.