JP4399295B2 - Hot and cold water faucet - Google Patents

Description

  The present invention relates to a hot and cold water mixing faucet having a valve body that changes the mixing ratio of hot water and water and having an automatic temperature adjustment function, for example.

For example, as a hot and cold water mixing faucet with an automatic temperature adjustment function installed in a bathroom or a wash basin, etc., a hot water valve seat and a water valve seat are provided so as to sandwich a substantially cylindrical valve body, and the valve body is opened with respect to the hot water valve seat. Hot water with a flow rate according to the degree enters the valve body from the upstream part of the valve body, and water with a flow rate according to the opening degree of the valve body with respect to the water valve seat enters the valve body from the central part of the valve body and passes through the valve body. The hot water or the water that has reached the mixing section on the downstream side or the mixed water formed by mixing them is discharged to the outside, and the valve element is provided by a temperature-sensitive operation section provided in the mixing section. Is configured to automatically adjust the mixing ratio of hot water and water. Even if the mixing ratio of hot water and water changes due to, for example, fluctuations in hot water supply / water supply pressure, etc., and the temperature of the mixed water changes, the temperature is immediately set to the original setting. Can be returned to temperature.
JP-A-8-233153

  However, the pressure of water introduced into the valve body from between the water valve seat and the valve body is often much higher than the pressure of hot water introduced into the valve body from between the hot water valve seat and the valve body. In this case, the flow of hot water is blocked by the high-pressure water introduced into the valve body, and the temperature of the mixed water may not be sufficiently increased.

  The present invention has been made in consideration of the above-mentioned matters, and an object of the present invention is to provide a hot and cold water mixing faucet that can perform mixing of hot water and water at a desired mixing ratio.

In order to achieve the above object, the hot and cold water mixing faucet of the present invention is provided with a hot water valve seat and a water valve seat so as to sandwich a substantially cylindrical valve body, and a flow rate corresponding to the opening degree of the valve body with respect to the hot water valve seat. Water enters the valve body from the upstream part of the valve body, and water with a flow rate corresponding to the opening degree of the valve body with respect to the water valve seat enters the valve body from the downstream part of the valve body, and is downstream through the valve body A hot and cold water mixing faucet configured to discharge the hot water or the water that has reached the mixing section or mixed water obtained by mixing them to the outside,
The valve body is accommodated in the housing so as to be slidable in the opening direction, and from the water valve seat side via a substantially cylindrical slide member by a temperature-sensitive spring disposed in the mixing portion. While being energized to the hot water valve seat side,
The slide member is in contact with a plurality of bridges provided at substantially equal intervals in the circumferential direction at the water valve seat side end of the valve body,
Further, between the adjacent bridges, are formed introducing path for introducing from the outside to the inside of the water the valve body through the between the valve body and the water valve seat,
Furthermore, in order to guide the water that has passed between the valve body and the water valve seat to the downstream side , an annular and downstream surface at a position corresponding to the inside of the introduction path on the inner wall of the valve body However, the guide part comprised so that it may be located in a downstream is provided in the inner side (Claim 1).

  In the hot / cold water faucet according to claim 1, since the guide portion is provided, even if the pressure of water introduced from the downstream portion of the valve body into the valve body is high, the water is directed to the upstream portion of the valve body. This can be prevented and sent to the mixing section located downstream of the valve body. Therefore, it is possible to reliably prevent the introduction of hot water from the upstream portion of the valve body into the valve body by the water. Furthermore, when water flows from the downstream part of the valve body toward the mixing part, the hot water flows so as to be sucked from the upstream part of the valve body toward the downstream part due to the so-called ejector effect. The effect that water and hot water having a pressure lower than that of water can be well mixed at a predetermined mixing ratio is ensured, and the temperature of the mixed water is very stable.

1 and 2 show one embodiment of the present invention, and FIG. 1 is an explanatory view schematically showing the configuration of a hot and cold water mixing faucet according to one embodiment of the present invention, FIGS. 2 (A) and (B). These are the longitudinal cross-sectional view and rear view which show schematically the structure of the valve body 1 of a hot-water and a water mixing faucet.
As shown in FIG. 1, the hot and cold water mixing faucet of this embodiment is provided with a hot water valve seat 2 and a water valve seat 3 so as to sandwich a substantially cylindrical valve body 1, and the valve body 1 is opened with respect to the hot water valve seat 2. Hot water with a flow rate according to the degree enters the valve body 1 from the upstream portion of the valve body 1, and water with a flow rate according to the opening degree of the valve body 1 relative to the water valve seat 3 flows from the downstream portion of the valve body 1 to the valve body 1. The hot water, the water, or the mixed water obtained by mixing them enters the inside of the valve body 1 and reaches the mixing section 4 on the downstream side thereof, and is discharged to the outside. In addition, a coil-shaped temperature-sensitive spring 5 made of a shape memory alloy that biases the valve body 1 in a direction in which the opening degree with respect to the hot water valve seat 2 is reduced is provided in the mixing portion, and the valve body 1 is moved by the temperature-sensitive spring 5. The mixing ratio of hot water and water is automatically adjusted.

  Specifically, the valve body 1 is accommodated in the housing 6 so as to be slidable in the left-right direction in the drawing. And this valve body 1 is urged | biased by the left side in the figure through the substantially cylindrical slide member 7 with the temperature-sensitive spring 5 arrange | positioned in the mixing part 4. FIG. The slide member 7 includes a plurality of (six in this embodiment) bridges 1a (see FIGS. 2A and 2B) provided at substantially equal intervals in the circumferential direction at the right end of the valve body 1 in the drawing. Between the adjacent bridges 1a, and an introduction path 1b (FIG. 2A) for introducing water that passes between the valve body 1 and the water valve seat 3 from the outside to the inside of the valve body 1. (B)) is formed.

  Further, a rib 1c having a cross section in the longitudinal section is continuously provided inside the valve body 1, and this rib 1c is brought into contact with one end of a shaft 9 through which a hot water valve seat member 8 forming the hot water valve seat 2 is inserted. Touching. The shaft 9 is movable in the left-right direction in the figure, and is biased to the right side in the figure by a bias spring 10. That is, the valve body 1 is urged to the right side in the figure by the bias spring 10 through the shaft 9.

Reference numeral 11 denotes a screw rod connected to the stopper rod 12a of the temperature adjustment handle 12, and 13 denotes a groove in which the screw rod 11 is engaged, and slides in the left-right direction in the figure in conjunction with the rotation of the temperature adjustment handle 12. It is a substantially cylindrical interlocking member. The left end of the bias spring 10 in the drawing is in contact with the interlocking member 13.

  That is, the position of the valve body 1 is maintained by a balance between the biasing of the temperature-sensitive spring 5 to the left side in the drawing and the biasing spring 10 to the right side of the drawing in the drawing, and the temperature adjustment handle 12 is rotated. Then, the urging force of the interlocking member 13 against the bias spring 10 changes, and thereby the valve body 1 moves in the left-right direction in the figure.

  14 and 15 are hot water inlets and water inlets provided in the housing 6, and 16 is an annular packing provided on the outer peripheral wall of the valve body 1. Reference numeral 17 denotes a water valve seat member that is inserted into the housing 6 and forms the water valve seat 3.

  The configuration so far is not different from the conventional hot and cold water mixing tap. The hot and cold water mixing faucet of this embodiment guides the water passing between the valve body 1 and the water valve seat 3 to the downstream side at a position corresponding to the inside of the introduction path 1b on the inner wall of the valve body 1. This is characterized in that a guide portion 18 is provided.

  The guide portion 18 has an annular shape and is configured such that the downstream side surface thereof is located on the downstream side toward the inner side.

  In the hot and cold water mixing faucet having the above-described configuration, the hot water that has entered the housing 6 from the hot water inlet 14 passes between the valve body 1 and the hot water valve seat 2 and from the upstream portion (upstream end) of the valve body 1. Enter the valve body 1. On the other hand, the water that has entered the housing 6 from the water introduction port 15 passes between the valve body 1 and the water valve seat 3 and enters the valve body 1 through the introduction path 1 b provided in the downstream portion of the valve body 1. enter. Then, hot water or water that enters the valve body 1 and reaches the mixing section 4 on the downstream side thereof, or mixed water obtained by mixing them is discharged to the outside of the hot water mixing faucet.

  Here, for example, when the mixing ratio of hot water and water in the mixing section 4 changes due to fluctuations in hot water supply / water supply pressure and the temperature of the mixed water increases, the temperature-sensitive spring 5 in the mixing section 4 extends in its axial direction, Along with this, the valve body 1 moves to the hot water valve seat 2 side, the water flow ratio increases, and the temperature of the mixed water returns. On the other hand, when the temperature of the mixed water is lowered, the temperature sensitive spring 5 is contracted in the axial direction, and accordingly, the valve body 1 is moved to the water valve seat 3 side, and the flow rate of hot water is increased. As a result, the temperature of the mixed water returns. In this way, automatic temperature adjustment of the mixed water is performed.

Incidentally, showing a reference example of guide portion in FIG. Downstream-side surface of the guide portion 18 'is, in FIG. 3 (A), has been shown shall have been substantially perpendicular to the axial direction of the valve body 1 from the outside to the inside, FIG. 3 ( the B), the inner portion of the guide portion 18 '', a cylindrical portion 18a extending below stream side is formed, the cylindrical portion 18a is Ru substantially uniform der its diameter from the upstream side to the downstream side Things are shown .

It is explanatory drawing which shows schematically the structure of the principal part of the hot-water / water-mixing faucet concerning one Example of this invention. (A) And (B) is the longitudinal cross-sectional view and back view which show the structure of a valve body roughly. (A) And (B) is explanatory drawing which shows roughly the structure of the reference example of a valve body, respectively.

1 Disc
1a bridge 1b introduction path 2 hot water valve seat 3 water valve seat 4 mixing section
5 temperature sensitive spring
6 housing
7 Slide member 18 Guide part

Claims (1)

A hot water valve seat and a water valve seat are provided so as to sandwich the substantially cylindrical valve body, and hot water with a flow rate corresponding to the opening degree of the valve body with respect to the hot water valve seat enters the valve body from the upstream side of the valve body, The water having a flow rate corresponding to the degree of opening of the valve body enters the valve body from the downstream part of the valve body, passes through the valve body and reaches the mixing part on the downstream side, or the water or the water or a mixture thereof A hot and cold water faucet configured to discharge mixed water to the outside,
The valve body is accommodated in the housing so as to be slidable in the opening direction, and from the water valve seat side via a substantially cylindrical slide member by a temperature-sensitive spring disposed in the mixing portion. While being energized to the hot water valve seat side,
The slide member is in contact with a plurality of bridges provided at substantially equal intervals in the circumferential direction at the water valve seat side end of the valve body,
Further, between the adjacent bridges, are formed introducing path for introducing from the outside to the inside of the water the valve body through the between the valve body and the water valve seat,
Furthermore, in order to guide the water that has passed between the valve body and the water valve seat to the downstream side , an annular and downstream surface at a position corresponding to the inside of the introduction path on the inner wall of the valve body However, a hot and cold water mixing faucet characterized in that a guide portion configured to be positioned on the downstream side toward the inner side is provided.

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