JP6554079B2 - Hot water tap - Google Patents

Description

  The present invention relates to a hot and cold water mixing tap.

  A single-lever hot and cold water faucet is known. With this hot / cold water mixing tap, it is possible to switch between hot water and water and to adjust the hot / cold water mixing ratio by turning the lever handle left and right. Further, the amount of discharge can be adjusted by rotating the lever handle back and forth (up and down).

  Unexamined-Japanese-Patent No. 2010-185569 discloses the hot and cold water mixing valve in which the hot water inflow valve hole and the water inflow valve hole were symmetrically formed in the fixed valve body. This hot and cold water mixing tap is configured such that only water is discharged when the lever handle is opened while the lever handle is positioned between the hot water inlet valve hole and the water inlet valve hole.

  JP-A-2015-124819 discloses a hot and cold water mixing valve in which a stepped portion is formed in a water passage of a fixed valve so as to change the flow passage cross-sectional area. This level | step-difference part is equipped with the flow-rate raise suppression means which suppresses the raise of the flow rate of the water of passing.

JP 2010-185569 A Japanese Patent Laying-Open No. 2015-124819

  In the hot and cold water mixing tap described in JP 2010-185569 A, the hole shape of the movable valve body is changed from the normal shape so that only water is discharged at the front position where the frequency of use is high. However, in this hot and cold water mixing valve, when the discharge amount is maximized in the hot and cold water mixing area, it was found that the disturbance of the water flow and the cavitation occur to generate an abnormal noise. In addition, it was also found that the water temperature is difficult to rise in the hot and cold water mixing region with this hot and cold water mixing valve.

  In the hot and cold water mixing tap described in Japanese Patent Application Laid-Open No. 2015-124819, a step portion is provided in order to suppress abnormal noise just before the water stops. However, it has been found that this step portion has little effect of suppressing abnormal noise when the discharge amount is maximized in the hot and cold water mixing region.

  An object of the present invention is to provide a hot and cold water mixing valve capable of suppressing abnormal noise.

  A preferable hot and cold water mixing plug according to the present invention has a fixed valve body having an inflow hole and an outflow hole composed of a water inflow hole and a hot water inflow hole, and a flow path forming recess for communicating the inflow hole and the outflow hole. And a movable valve body that can slide on the fixed valve body, and a lever handle that can move the movable valve body. The discharge amount is adjusted by changing the lever back and forth position by rotating the lever handle back and forth. The discharge temperature is adjusted by changing the left / right position of the lever by the left / right rotation of the lever handle. The lever left and right position has a water area where only water from the water inflow hole is discharged, a hot water area where only hot water from the hot water inflow hole is discharged, and a hot water mixing area. An overlapping area between the water inflow hole and the flow path forming recess is defined as a water-side overlapping area Sc. The overlapping area of the hot water inflow hole and the flow passage forming recess is taken as a hot water side overlapping area Sh. The total area of the area Sc and the area Sh is S. The total area S has the maximum value Smax and the minimum value Smin when changing the lever left and right position from the water side limit to the hot water side limit while keeping the lever front and back position at the maximum discharge position. The left and right position of the lever when the total area S becomes the minimum value Smin is in the hot and cold water mixing area. Smin / Smax is 0.70 or less.

The water side overlapping area Sc when the total area S becomes the minimum value Smin is taken as Sc1. At this time, Sc1 / Smax is preferably 0.50 or less.
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  A preferable hot and cold water mixing plug from another viewpoint has a fixed valve body having an inflow hole and an outflow hole made up of a water inflow hole and a hot water inflow hole, and a flow path forming recess for communicating the inflow hole and the outflow hole. And a movable valve body that can slide on the fixed valve body, and a lever handle that can move the movable valve body. The discharge amount is adjusted by changing the lever back and forth position by rotating the lever handle back and forth. The discharge temperature is adjusted by changing the left / right position of the lever by the left / right rotation of the lever handle. On the upper surface of the fixed valve body, a central angle θ1 of a hole portion between the water inflow hole and the hot water inflow hole is 20 ° or more.

  In the upper surface of the fixed valve body, the central angle between the vertical center line of the fixed valve body and the water inflow hole is θc1, and the central angle between the vertical center line and the hot water inflow hole is θh1. The central angle of the water inlet hole is θc2, the central angle of the hot water inlet hole is θh2, and the total of the central angles θc1, θh1, θc2, and θh2 is θ. Preferably, θ1 / θ is 0.1 or more and 0.175 or less.

  Preferably, θc1 / θ1 is 0.42 or more and 0.95 or less.

  A preferable hot and cold water mixing plug from another viewpoint has a fixed valve body having an inflow hole and an outflow hole made up of a water inflow hole and a hot water inflow hole, and a flow path forming recess for communicating the inflow hole and the outflow hole. And a movable valve body that can slide on the fixed valve body, and a lever handle that can move the movable valve body. The discharge amount is adjusted by changing the lever back and forth position by rotating the lever handle back and forth, and the discharge temperature is adjusted by changing the lever left and right position by moving the lever handle left and right. It is configured to be adjusted. On the upper surface of the fixed valve body, rotate a half line extending outward from the center point of the fixed valve body, from a position overlapping the longitudinal center line of the fixed valve body, around the center point toward the hot water side In this case, the first point of contact with the upper opening line of the hot water inlet is PH2. In the upper surface of the fixed valve body, a half straight line extending outward from the center point of the fixed valve body is centered on the center point toward the water side from a position overlapping the longitudinal center line of the fixed valve body. When rotated, the point that first contacts the upper opening line of the water inflow hole is defined as PW2. The distance between the point PH2 and the point PW2 is taken as the shortest distance d. In the hot and cold water mixing tap, the shortest distance d is 3 mm or more and 3.8 mm or less.

  The intersection of the straight line Ld connecting the point PH2 and the point PW2 and the vertical center line is P1, the distance between the point PH2 and the point P1 is d1, and the distance between the point PW2 and the point P1 is d2. Preferably, d1 ≦ d2 is established.

  Preferably, a flow regulating member is disposed in the flow path forming recess.

  Preferably, when the lever left and right position is in the front position, only water is discharged.

  A hot and cold water mixing tap in which the generation of abnormal noise is suppressed can be obtained.

FIG. 1 is a perspective view of a hot and cold water mixing valve according to an embodiment of the present invention. FIG. 2 is a front view showing a part of the hot and cold water mixing valve of FIG. FIG. 3 is a side view showing a part of the hot and cold water mixing tap of FIG. FIG. 4 is a perspective view of the lever assembly. FIG. 5 is a side view of the lever assembly. 6 is a cross-sectional view taken along the line F6-F6 of FIG. FIG. 7 is an exploded perspective view of the lever assembly. 8 (a) is a plan view (top view) of the lower member of the movable valve body, and FIG. 8 (b) is a bottom view (bottom view) of the lower member of the movable valve body. Fig.9 (a) is sectional drawing along the AA line of FIG.8 (b), FIG.9 (b) is sectional drawing along the BB line of FIG.8 (b). Fig.10 (a) is a top view (top view) of a fixed valve body, FIG.10 (b) is a side view of a fixed valve body, FIG.10 (c) is a bottom view (bottom view) of a fixed valve body. It is. 11 (a) is a plan view (top view) of the flow straightening member, FIG. 11 (b) is a side view of the flow straightening member, and FIG. 11 (c) is a bottom view (bottom view) of the flow straightening member. (A1) and (b1) of FIG. 12 show a state when the lever left-right position is at the hot water side limit and the lever front-rear position is at the water stop position. (A2) and (b2) of FIG. 12 show a state when the lever left-right position is at the hot water side limit and the lever front-rear position is at the maximum discharge position. Note that (a1) and (a2) show reference examples, and (b1) and (b2) show embodiments. (A3) and (b3) of FIG. 13 show a state in which the lever left-right position is in the hot water / mixing region and the lever front-rear position is in the water stop position. (A4) and (b4) of FIG. 13 show a state where the lever left-right position is in the hot and cold mixing region and the lever front-rear position is at the maximum discharge position. Note that (a3) and (a4) show reference examples, and (b3) and (b4) show embodiments. (A5) and (b5) of FIG. 14 show a state when the lever left-right position is in the front position and the lever front-rear position is in the water stop position. (A6) and (b6) of FIG. 14 show a state where the lever left-right position is at the front position and the lever front-rear position is at the maximum discharge position. Note that (a5) and (a6) show reference examples, and (b5) and (b6) show embodiments. (A7) and (b7) of FIG. 15 show a state where the lever left-right position is at the water limit and the lever front-rear position is at the water stop position. (A8) and (b8) of FIG. 15 show a state when the lever left-right position is at the water limit and the lever front-rear position is at the maximum discharge position. (A7) and (a8) show reference examples, and (b7) and (b8) show embodiments. FIG. 16 is a plan view (top view) of the fixed valve body according to the first embodiment. FIG. 17 is a plan view (top view) of the fixed valve body according to the second embodiment. FIG. 18 is a plan view (top view) of the fixed valve body according to the third embodiment. FIG. 19 is a plan view (top view) of the fixed valve body according to the fourth embodiment. FIG. 20 is a plan view (top view) of the fixed valve body according to the fifth embodiment. FIG. 21 is a plan view (top view) of the fixed valve body according to the sixth embodiment. Fig.22 (a) is a top view of the lower side member to which the rectification | straightening member was attached, FIG.22 (b) is sectional drawing along the AA of FIG. 22 (a), FIG.22 (c) 22 is a cross-sectional view taken along the line C-C of FIG. FIG. 23 is a plan view showing a pivot range of the lever handle. FIG. 24 is a graph showing the hot water side overlapping area Sh and the water side overlapping area Sc at each of the lever left and right positions.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the drawings as appropriate.

  FIG. 1 is a perspective view of a hot and cold water mixing tap 10 according to an embodiment of the present invention. FIG. 2 is a front view of the upper portion of the hot and cold water mixing valve 10. FIG. 3 is a side view of the upper part of the hot and cold water mixing tap 10. The hot and cold water mixing tap 10 includes a main body 12, a lever handle 14, a discharge portion 16, a hot water introduction pipe 18, a water introduction pipe 20 and a discharge pipe 22. The ejection unit 16 has a head 24. The head 24 has a switching lever 26. By the operation of the switching lever 26, it is possible to switch between shower discharge and normal discharge. The hot / cold mixing tap 10 is used, for example, in a kitchen, a wash basin or the like.

  Furthermore, the head 24 has a switching button 28 and a display unit 30. The discharge unit 16 incorporates a water purification cartridge (not shown). The switching button 28 switches between a flow path that passes through the water purification cartridge and a flow path that does not pass through the water purification cartridge. If it switches to the flow path which permeates a water purification cartridge, purified water will be discharged. If it switches to the flow path which does not permeate | transmit a water purification cartridge, raw water will be discharged. The display unit 30 displays whether the discharged water is purified water or raw water.

  The front and rear position of the lever is changed by the front and rear rotation (up and down rotation) of the lever handle 14. The discharge amount is adjusted according to the lever front-rear position. In the present embodiment, the amount of discharge increases as the lever handle 14 is moved upward. The position of the lever handle 14 in FIG. 3 is the lowest side (water stop position) of the movable range. Note that, contrary to this configuration, the discharge amount may be increased as the lever handle 14 is moved downward.

  As the lever handle 14 rotates left and right, the lever left-right position changes. The mixing ratio of hot water and water changes depending on the left / right position of the lever. The discharge temperature can be adjusted by rotating the lever handle 14 left and right.

  The mixing tap 10 has a lever assembly 38 therein. FIG. 4 is a perspective view of the lever assembly 38. As shown in FIG. FIG. 5 is a side view of the lever assembly 38. FIG. 6 is a cross sectional view of the lever assembly 38 taken along a cross section perpendicular to the lever axis. FIG. 7 is an exploded perspective view of the lever assembly 38.

  As shown in FIG. 7, the lever assembly 38 includes the movable body 40, the housing 42, the rotating body 44, the lever 46, the lever shaft 48, the left and right click elastic members 50, the left and right click contact members 52, the shaft 54, and the front and rear It has a click abutment 56, a front and rear click elastic member 58, a movable valve body 60, a flow straightening member 61, a fixed valve body 62, a packing 64, an O-ring 66, an O-ring 67, and a base 68. The aforementioned lever handle 14 is fixed to the lever 46.

  The front / rear click contact body 56 and the front / rear click elastic member 58 are attached to the moving body 40. The front and rear click contact members 56 are in contact with the front and rear click engaging portions while being urged by the front and rear click elastic members 58 (torsion springs). Although not shown, the front-rear click engaging portion is provided on the side surface 59 of the lever 46. Due to the contact between the front-rear click engaging portion and the contact body 56, a click feeling accompanying the front-rear rotation of the lever 46 occurs.

 The left-right click contact body 52 and the left-right click elastic member 50 are attached to the rotating body 44. The left-right click contact body 52 can be brought into contact with the left-right click engagement portion while being urged by the left-right click elastic member 50 (plate spring). Although the left and right click engaging portions are not shown, they are provided on the inner surface of the housing 42. Due to the contact between the contact member 52 and the left and right click engaging portion, a click feeling accompanied by the left and right rotation of the lever 46 is generated.

  The base body 68 has a hot water inlet 70, a water inlet 72, and an outlet 74. In the lower part of the base body 68, openings corresponding to the hot water inlet 70, the water inlet 72 and the outlet 74 are provided, and the hot water inlet pipe 18 and the water inlet pipe 20 are provided in these openings respectively. And the discharge pipe 22 is connected.

  The fixed valve body 62 is fixed to the upper side of the base body 68. The base body 68 is provided with an engaging convex portion 76 for fixing the fixed valve body 62 and an engaging convex portion 77 for fixing the housing 42. The fixed valve body 62 is provided with an engagement recess 78 that engages with the engagement protrusion 76.

  The fixed valve body 62 has a hot water inflow hole 80, a water inflow hole 82, and an outflow hole 84. The hot water inlet 80 is connected to the hot water inlet 70 of the base body 68. The water inlet 82 is connected to the water inlet 72 of the base body 68. The outflow hole 84 is connected to the discharge port 74 of the base body 68.

  The movable valve body 60 has an upper member 86 and a lower member 88. The upper member 86 is fixed to the lower member 88. The upper member 86 has a convex portion 90. The lower member 88 has a recess 92. This fixing is achieved by the engagement of the projection 90 and the recess 92. In the present embodiment, the upper member 86 and the lower member 88 are separate members. By using separate members, optimum materials and manufacturing methods can be selected for each of the upper member 86 and the lower member 88. The movable valve body 60 may be integrally formed as a whole.

  On the upper surface of the fixed valve body 62, a smooth surface PL1 is provided. A smooth surface PL1 is formed in a portion where the holes 80, 82 and 84 are not present. On the other hand, a smooth surface PL2 is provided on the lower surface of the lower member 88 (movable valve body 60). A watertight state is ensured by surface contact between the smooth surface PL1 and the smooth surface PL2.

  The upper surface of the upper member 86 is provided with a lever engagement recess 98 which engages with the lower end 95 of the lever 46. The lower end 95 of the lever 46 is inserted into the lever engagement recess 98. The movable valve body 60 slides on the fixed valve body 62 in conjunction with the movement of the lever 46 (lever handle 14). The movable valve body 60 rotates in conjunction with the left and right rotation of the lever handle 14. The movable valve body 60 moves in conjunction with the forward and backward rotation of the lever handle 14.

  The engagement between the lever 46 and the lever engagement recess 98 may be direct or indirect. For example, another member may be interposed between the lever 46 and the lever engaging recess 98.

  The lever 46 has a shaft hole 100. A lever shaft 48 is inserted into the shaft hole 100.

  The rotating body 44 includes a base portion 102 and an upper portion 104. The upper part 104 has a lever insertion hole 106 and a shaft hole 108. The base 102 is slidably attached to (the upper member 86 of) the movable valve body 60.

  In the lever assembly 38, the lever 46 is inserted into the lever insertion hole 106, and the shaft hole 100 of the lever 46 and the shaft hole 108 of the rotating body 44 are coaxially arranged. A lever shaft 48 is inserted into the shaft hole 100 and the shaft hole 108. By the insertion of the lever shaft 48, the lever 46 is fixed to the pivoting body 44 in a state where it can be pivoted back and forth. The dimension of the lever insertion hole 106 is set so as to allow the lever 46 to rotate back and forth. In the present application, the rotation of the lever 46 and the rotation of the lever handle 14 with the lever shaft 48 as a rotation axis are also referred to as “front-rear rotation”.

  The moving body 40 is held by the rotating body 44 in a state where it can move up and down. The movable body 40 can only move up and down with respect to the rotating body 44 and cannot rotate relative to the rotating body 44. The moving body 40 is configured to rotate together with the rotating body 44 in conjunction with the left and right rotation of the lever handle 14 and to move up and down in conjunction with this rotation.

  The vertical movement of the moving body 40 is achieved by a cam mechanism formed between the moving body 40 and the housing 42. A convex portion (not shown) is formed on the inner peripheral surface of the moving body 40. This cam mechanism is configured by engagement of the convex portion formed on the movable body 40 and the groove 112 provided on the housing 42. The groove 112 is bent and extends. As the convex portion moves along the groove 112, the moving body 40 moves up and down while rotating. When the moving body 40 moves upward, the engagement related to the front-rear click (engagement between the contact body 56 and the front-rear click engaging portion) is released. When the moving body 40 moves downward, engagement related to back and forth click is achieved. Therefore, in the left and right rotation area of the lever handle 14, an area where the front and rear clicks occur and an area where the front and rear clicks do not occur are set.

  The moving body 40 is held by the rotating body 44 in a state where relative rotation with respect to the rotating body 44 is unnecessary. The moving body 40 rotates with the rotating body 44. The lever handle 14, the lever 46, the moving body 40 and the rotating body 44 rotate together.

  The housing 42 includes a small diameter cylindrical portion 120, a large diameter cylindrical portion 122, and a connecting portion 124. The connecting portion 124 extends in the radial direction of the housing 42. The small diameter cylindrical portion 120 has an upper opening 126. The large diameter cylindrical portion 122 has a lower opening 128. The groove 112 described above is provided on the outer peripheral surface of the small diameter cylindrical portion 120.

  The large diameter cylindrical portion 122 has an engagement hole 130. The engagement hole 130 is engaged with the engagement convex portion 77 of the base body 68. By this engagement, the housing 42 is fixed to the base body 68.

  The outer diameter of the circumferential surface portion of the upper portion 104 of the rotating body 44 is substantially equal to the inner diameter of the small diameter cylindrical portion 120. The upper part 104 of the rotating body 44 is held by the small diameter cylindrical part 120 in a rotatable state. In this rotation, the outer peripheral surface of the upper part 104 and the inner peripheral surface of the small diameter cylindrical part 120 slide. The large-diameter cylindrical portion 122 accommodates the base portion 102 of the rotating body 44, the movable valve body 60 and the fixed valve body 62.

  FIG. 8A is a plan view of the lower member 88 of the movable valve body 60. FIG. FIG. 8 (b) is a bottom view of the lower member 88. FIG. 9A is a cross-sectional view taken along the line A-A of FIG. FIG. 9B is a cross-sectional view taken along the line BB in FIG. A flow path forming recess 94 is formed on the lower surface of the lower member 88 (movable valve body 60). The flow path forming recess 94 is open downward. The flow passage forming recess 94 is a recess having a bottom. That is, the upper side of the flow passage forming recess 94 is closed. Of the lower surface of the lower member 88, the aforementioned smooth surface PL2 is provided in a portion where the flow path forming recess 94 is not formed.

  The flow path forming recess 94 has a lower opening line 94b. As will be described later, the overlap between the area surrounded by the lower opening line 94 b and the upper opening of each valve hole of the fixed valve body 62 determines the specification of water discharge.

  In the present embodiment, the flow path forming recess 94 is formed only by the lower member 88. The flow path forming recess 94 may be formed by two members. For example, the flow path forming recess 94 may be formed by a lower member having a through hole and an upper member having a recess. In this case, the recess of the upper member is disposed to close the upper opening of the through hole of the lower member, and the passage forming recess 94 is formed by combining the through hole and the recess.

 FIG. 10A is a plan view (top view) of the fixed valve body 62. FIG. FIG. 10B is a side view of the fixed valve body 62. FIG. 10C is a bottom view (bottom view) of the fixed valve body 62. As described above, the fixed valve body 62 has the hot water inlet 80, the water inlet 82 and the outlet 84.

  The hot water inflow hole 80 has an upper opening line 80a. The upper opening line 80a is a contour line of the hot water inflow hole 80 in the smooth surface PL1. The upper opening line 80 a is a contour of the upper opening of the hot water inflow hole 80. As shown in FIG. 10A, the upper opening defined by the upper opening line 80a is a bent long hole. Furthermore, the hot water inflow hole 80 has a lower opening line 80b. The lower opening line 80 b is a contour of the lower opening of the hot water inlet 80.

  The hot water inflow hole 80 has a first inclined surface Y1 and a second inclined surface Y2. The first inclined surface Y1 and the second inclined surface Y2 are upward inclined surfaces. The first inclined surface Y <b> 1 is located at the water-side end in the longitudinal direction of the hot water inflow hole 80. The second inclined surface Y <b> 2 is located at the end of the hot water side in the longitudinal direction of the hot water inflow hole 80. The first inclined surface Y1 is inclined upward as it goes to the water side. The second inclined surface Y2 is inclined upward as it goes to the hot water side.

  The water inflow hole 82 has a first inclined surface M1 and a second inclined surface M2. The first inclined surface M1 and the second inclined surface M2 are upward inclined surfaces. The first inclined surface M <b> 1 is located at the end of the hot water side in the longitudinal direction of the water inflow hole 82. The second inclined surface M <b> 2 is located at the water-side end in the longitudinal direction of the water inflow hole 82. The first inclined surface M1 is inclined to be higher on the hot water side. The second inclined surface M2 is inclined so as to be on the upper side as it goes to the water side.

  The water inflow hole 82 has an upper opening line 82a. The upper opening line 82a is a contour line of the water inflow hole 82 in the smooth surface PL1. The upper opening line 82 a is a contour of the upper opening of the water inflow hole 82. As shown in FIG. 10A, the upper opening defined by the upper opening line 82a is a bent long hole. Further, the water inflow hole 82 has a lower opening line 82b. The lower opening line 82 b is a contour of the lower opening of the water inflow hole 82.

  The outflow hole 84 has an upper opening line 84a. The upper opening line 84a is a contour line of the outflow hole 84 in the smooth surface PL1. The upper opening line 84 a is a contour of the upper opening of the outflow hole 84. Furthermore, the outflow hole 84 has a lower opening line 84b. The lower opening line 84 b is a contour of the lower opening of the outflow hole 84.

  10 (a) and 10 (c), the vertical center line L1 of the fixed valve body 62 is indicated by a one-dot chain line. The vertical center line L1 is defined in a plan view (a plan view and a bottom view) of the fixed valve body 62. In a plan view of the fixed valve body 62 (hereinafter, also simply referred to as a plan view), the center line CH1 (see FIG. 23) of the lever handle 14 when the lever handle 14 is on the front coincides with the longitudinal center line L1. In a plan view, the longitudinal center line L1 is a symmetry axis of the upper opening line 84a. In the plan view, the longitudinal center line L1 is an axis of symmetry of the contour line 96 of the fixed valve body 62.

  10A and 10C, the horizontal center line L2 of the fixed valve body 62 is indicated by a one-dot chain line. The lateral center line L2 is defined in a plan view (a plan view and a bottom view) of the fixed valve body 62. The horizontal center line L2 intersects the vertical center line L1 at a right angle. The horizontal center line L2 passes through a center point VC described later.

  In FIGS. 10 (a) and 10 (c), the center point VC of the fixed valve body 62 is indicated by an alternate long and short dash line. The outline 96 of the fixed valve body 62 has an arc portion. The center point VC of the fixed valve body 62 coincides with the center of a circle whose part is the arc portion. In a plan view, when considering a circular region having a diameter D including the entire fixed valve body 62, the minimum circular region when the diameter D is minimum can be determined. The center point VC coincides with the center point of this minimum circular area. The center point VC is an intersection point of the vertical center line L1 and the horizontal center line L2.

  In the present application, the wording "inflow hole" is used. This inflow hole is a concept including a hot water inflow hole 80 and a water inflow hole 82. Moreover, in this application, the wording "flow passage hole" is used. This passage hole is a concept including the inflow holes 80 and 82 and the outflow hole 84. The fixed valve body 62 has these flow passage holes 80, 82, 84.

  As shown in FIG. 10A, the inflow holes 80 and 82 (upper opening lines 80a and 82a) are arranged asymmetrically in the left-right direction. The upper opening line 80a and the upper opening line 82a are asymmetric with respect to the vertical center line L1. The upper opening line 80a is closer to the longitudinal center line L1 than the upper opening line 82a.

  FIG. 11A is a plan view of the rectifying member 61. FIG. 11B is a side view of the rectifying member 61. FIG. 11C is a bottom view of the rectifying member 61. The rectifying member 61 has the same outline shape as the flow path forming recess 94 (see FIG. 8B). The rectifying member 61 is made of a wire mesh. In FIG. 11A, a part of the rectifying member 61 is drawn in a net shape, but in reality, the entire rectifying member 61 is a wire net. The rectifying member 61 is a molded wire mesh. The flow straightening member 61 is accommodated in the flow passage forming recess 94. The flow straightening member 61 is fixed to the flow passage forming recess 94. The rectifying member 61 is fitted in the flow path forming recess 94. The rectifying member 61 may be disposed at least in part of the flow path forming recess 94.

  The rectifying member 61 adjusts the flow in the flow path forming recess 94. The rectifying member 61 suppresses turbulent flow in the flow path forming recess 94. Therefore, abnormal noise is suppressed.

  The rectifying member 61 is not limited to a wire mesh. If there is water permeability, it can be the flow straightening member 61. As the flow control member 61, a wire mesh, a resin mesh, a non-woven fabric (having a coarse mesh) is exemplified. Examples of wire mesh include woven wire mesh, turtle shell wire mesh, tough clean (diamond wire mesh), punching metal and wedge wire screen (weld wire mesh). Examples of the weaving method of the woven wire mesh include plain weave, twill weave, plain tatami weave, ton cap weave, and flat top weave.

  A wire mesh is preferred from the viewpoint of flow straightening, water permeability and formability. In the metal mesh, the mesh, mesh size, wire diameter, space ratio, etc. are selected in consideration of the balance between water permeability and rectification.

  The flow regulating member 61 may not be woven. For example, the straightening member 61 may have a structure in which straight line members are arranged in parallel. The rectifying member 61 may have a brush-like structure.

  12, 13, 14 and 15 show the overlapping state of the movable valve body 60 (lower member 88) and the fixed valve body 62 (fixed valve body 62h). In other words, these figures show the overlapping state of the channel forming recess 94 (channel forming recess 94) and the channel holes 80, 82, 84 (upper opening line 80a, upper opening line 82a, upper opening line 84a). Indicates. In these figures, a lower opening line 94b, an upper opening line 80a and an upper opening line 82a viewed from above are shown. Although each line should be a dashed line, the lower opening line 94b is shown by a solid line in consideration of legibility. In addition, a portion of the upper opening line 80a and the upper opening line 82a overlapping the flow path forming recess 94 is shown by a solid line.

  12 to 15, (a1), (a2), (a3), (a4), (a5), (a6), (a7), and (a8) used the fixed valve body 62h of the reference example. In this case, the overlapping state is shown. On the other hand, (b1), (b2), (b3), (b4), (b5), (b6), (b7) and (b8) show the overlapping state when the fixed valve body 62 of the embodiment is used. Show.

  As (a1) to (a8) in FIG. 12 to FIG. 15 show, in the fixed valve body 62h of the reference example, the upper opening line 80a and the upper opening line 82a are line symmetrical with the longitudinal center line L1 as the symmetry axis. is there. On the other hand, as shown in (b1) to (b8) of FIGS. 12 to 15, in the fixed valve body 62 of the embodiment, the upper opening line 80a and the upper opening line 82a are lines having the longitudinal center line L1 as the axis of symmetry. Not symmetric.

  (A1) and (b1) of FIG. 12 show a state when the lever left-right position is at the hot water side limit and the lever front-rear position is at the water stop position. (A2) and (b2) of FIG. 12 show a state when the lever left-right position is at the hot water side limit and the lever front-rear position is at the maximum discharge position.

  (A3) and (b3) of FIG. 13 show a state in which the lever left-right position is in the hot water / mixing region and the lever front-rear position is in the water stop position. (A4) and (b4) of FIG. 13 show a state where the lever left-right position is in the hot and cold mixing region and the lever front-rear position is at the maximum discharge position.

  (A5) and (b5) of FIG. 14 show a state when the lever left-right position is in the front position and the lever front-rear position is in the water stop position. (A6) and (b6) of FIG. 14 show a state where the lever left-right position is at the front position and the lever front-rear position is at the maximum discharge position.

  (A7) and (b7) of FIG. 15 show a state where the lever left-right position is at the water limit and the lever front-rear position is at the water stop position. (A8) and (b8) of FIG. 15 show a state when the lever left-right position is at the water limit and the lever front-rear position is at the maximum discharge position.

  In FIG. 12 to FIG. 15, the overlapping area Sh of the hot water inflow hole 80 and the flow passage forming concave portion 94 is indicated by hatching. Further, the overlapping area Sc of the water inflow hole 82 and the flow path forming concave portion 94 is indicated by hatching. Hot water is discharged due to the overlapping area Sh. Water is discharged due to the overlapping area Sc. In the present application, the overlapping area Sh is also referred to as a hot water side overlapping area. The overlapping area Sc is also referred to as a water side overlapping area.

  As (a2) in FIG. 12 shows, in the reference example, when the lever left / right position is at the hot water side limit, the overlapping area Sh exists and the overlapping area Sc does not exist. That is, in this case, only hot water (100% hot water) is discharged. In this respect, the present embodiment is also the same. As (b2) of FIG. 12 shows, in the embodiment, when the lever left / right position is the hot water side limit, the overlapping area Sh exists and the overlapping area Sc does not exist. That is, also in this case, only hot water (100% of hot water) is discharged.

  As (a8) of FIG. 15 shows, when the lever left-right position is the water side limit in the reference example, the overlapping area Sc exists and the overlapping area Sh does not exist. That is, in this case, only water (100% water) is discharged. In this respect, the present embodiment is also the same. As (b8) of FIG. 15 shows, when the lever left-right position is the water side limit in the embodiment, the overlapping area Sc exists and the overlapping area Sh does not exist. That is, also in this case, only water (100% water) is discharged.

  As (a6) of FIG. 14 shows, when the lever left-right position is the front position in the reference example, the overlapping area Sc exists and the overlapping area Sh does not exist. That is, in this case, only water (100% water) is discharged. In this respect, the present embodiment is also the same. As (b6) of FIG. 14 shows, when the lever left-right position is the front position in the embodiment, the overlapping area Sc exists and the overlapping area Sh does not exist. That is, also in this case, only water (100% water) is discharged. That is, when the lever left and right position is the front position, only water is discharged.

  As shown in (a4) and (b4) of FIG. 13, both the overlapping area Sc and the overlapping area Sh exist in both the reference example and the embodiment. That is, in this case, the water and the hot water are mixed and discharged.

  In FIG. 13, the lever left and right position is a predetermined position at the hot and cold water mixing position. The lever left-right position is the same between (a4) and (b4). In this same lever left-right position, the overlapping area Sc of the embodiment is smaller than the overlapping area Sc of the reference example. In the same lever left and right position, Sh / Sc of the embodiment is larger than Sh / Sc of the reference example. In the embodiment, the water side overlapping area Sc is suppressed. By suppressing the water side overlapping area Sc on the water side where the water pressure is high, the turbulent flow in the hot and cold water mixing area is effectively suppressed.

  FIG. 16 is a plan view of the fixed valve body 62 (first embodiment) as viewed from above.

  As shown in FIG. 16, Lc <b> 1 is a half line extending from the center point VC of the fixed valve body 62 toward the outside of the fixed valve body 62. The half straight line Lc1 passes through the most hot water side point PW2 in the upper opening line 82a. When the half line starting from the center point VC is rotated around the point VC from the position overlapping the longitudinal center line L1 toward the water side, the half line Lc1 is first in contact with the upper opening line 82a. The contact is PW2.

  As shown in FIG. 16, Lc <b> 2 is a half line extending from the center point VC of the fixed valve body 62 toward the outside of the fixed valve body 62. The half straight line Lc2 passes the most water-side point in the upper opening line 82a. When the half line starting from the center point VC is rotated around the point VC from the position overlapping the longitudinal center line L1 toward the water side, the half line Lc2 is in contact with the upper opening line 82a last.

  As shown in FIG. 16, Lc3 (broken line) is a half line extending toward the outside of the fixed valve body 62 starting from the center point VC of the fixed valve body 62. The half straight line Lc3 passes the most hot water side point PW1 in the lower end line of the first inclined surface M1. When the half line starting from the center point VC is rotated around the point VC from the position overlapping the longitudinal center line L1 toward the water side, the half line Lc3 is first in contact with the lower end line of the first inclined surface M1. And the contact is PW1.

  As shown in FIG. 16, Lh <b> 1 is a half line extending from the center point VC of the fixed valve body 62 toward the outside of the fixed valve body 62. The half straight line Lh1 passes through the most water side point PH2 in the upper opening line 80a. When the half line starting from the center point VC is rotated around the point VC from the position overlapping the longitudinal center line L1 toward the hot water side, the half line Lh1 is first in contact with the upper opening line 80a. The contact is PH2.

  As shown in FIG. 16, Lh <b> 2 is a half line extending from the center point VC of the fixed valve body 62 toward the outside of the fixed valve body 62. The half straight line Lh2 passes the point on the most hot water side in the upper opening line 80a. When the half line starting from the center point VC is rotated around the point VC from the position overlapping the longitudinal center line L1 toward the hot water side, the half line Lh2 touches the upper opening line 80a last.

  As shown in FIG. 16, Lh3 (broken line) is a half line extending toward the outside of the fixed valve body 62 starting from the center point VC of the fixed valve body 62. The half straight line Lh3 passes the most water-side point PH1 on the lower end line of the first inclined surface Y1. When the half line starting from the center point VC is rotated around the point VC from the position overlapping the longitudinal center line L1 toward the hot water side, the half line Lh3 is first in contact with the lower end line of the first inclined surface Y1. And the contact is PH1.

  With respect to the upper opening lines of the hot water inlet 80 and the water inlet 82, in the present application, a central angle θ, a central angle θ1, a central angle θc1, a central angle θh1, a central angle θc2, and a central angle θh2 are defined. Each of these central angles is an angle at the fixed valve body 62 in plan view.

  The central angle θ is the sum of θc1, θh1, θc2 and θh2. The central angle θ is also the sum of θ1, θc2 and θh2.

  What is indicated by a double arrow θc1 in FIG. 16 is a central angle between the longitudinal center line L1 and the water inflow hole 82. The central angle θc1 is an angle formed by the longitudinal center line L1 and the half straight line Lc1.

  What is indicated by a double arrow θh1 in FIG. 16 is a central angle between the longitudinal center line L1 and the hot water inlet 80. The central angle θh1 is an angle formed by the longitudinal center line L1 and the half straight line Lh1.

  In FIG. 16, a double arrow θ <b> 1 indicates the central angle of the inter-hole portion B <b> 1 between the water inflow hole 82 and the hot water inflow hole 80. The central angle θ1 is the sum of θc1 and θh1.

  A center angle of the water inflow hole 82 is indicated by a double arrow θc2 in FIG. The central angle θc2 is an angle formed by the half line Lc1 and the half line Lc2.

  A center angle of the hot water inflow hole 80 is indicated by a double arrow θh2 in FIG. The central angle θh2 is an angle formed by the half line Lh1 and the half line Lh2.

  In the fixed valve body 62, θh2 is larger than θc2. Also, θc1 is larger than θh1. θh2 is greater than 90 °. θc2 is smaller than 90 °.

  In the fixed valve body 62, the upper opening line 80a has a straight portion 80c at the water-side end. The straight line portion 80c is substantially parallel to the vertical center line L1. The upper opening line 82a has a straight portion 82c at the end on the hot water side. The straight line portion 82c is substantially parallel to the vertical center line L1. In the present application, “substantially parallel” means that two straight lines are parallel or the angle formed by the two straight lines is 20 ° or less.

  FIG. 17 is a plan view of the fixed valve body 62A according to the second embodiment as viewed from above.

  In the fixed valve body 62A, θc1 is larger than θh1. θh2 (not shown) is smaller than 90 °. θ c2 (not shown) is smaller than 90 °.

  In the fixed valve body 62A, the upper opening line 80a has a straight portion 80c at the end on the water side. The straight line portion 80c is substantially parallel to the vertical center line L1. The upper opening line 82a has a straight portion 82c at the end on the hot water side. The straight line portion 82c is substantially parallel to the vertical center line L1.

  FIG. 18 is a plan view of the fixed valve body 62B according to the third embodiment as viewed from above.

  In the fixed valve body 62B, θc1 is larger than θh1. θh2 (not shown) is greater than 90 °. θc2 (not shown) is smaller than 90 °.

  In the fixed valve body 62B, the upper opening line 80a does not have a straight line portion at its water end. The upper opening line 80a has a curved portion 80d at its water side end. The curved portion 80 d is curved so as to be convex toward the outside of the hot water inflow hole 80. The half straight line Lh1 is in contact with the curved portion 80d.

  In the fixed valve body 62B, the upper opening line 82a does not have a straight portion at the end on the hot water side. The upper opening line 82a has a curved portion 82d at the end on the hot water side. The curved portion 82d is bent so as to be convex toward the outside of the water inflow hole 82. The half straight line Lc1 is in contact with the curved portion 82d.

  FIG. 19 is a plan view of the fixed valve body 62C according to the fourth embodiment as viewed from above.

  In the fixed valve body 62C, θc1 and θh1 are substantially the same, but θc1 is larger than θh1. θh2 (not shown) is greater than 90 °. θ c2 (not shown) is smaller than 90 °.

  In the fixed valve body 62C, the upper opening line 80a has a linear portion 80c at the water-side end. The straight line portion 80c is substantially parallel to the vertical center line L1.

  In the fixed valve body 62C, the upper opening line 82a does not have a straight portion at the end on the hot water side. The upper opening line 82a has a curved portion 82d at the end on the hot water side. The curved portion 82d is bent so as to be convex toward the outside of the water inflow hole 82. The half straight line Lc1 is in contact with the curved portion 82d.

  FIG. 20 is a plan view of the fixed valve body 62D according to the fifth embodiment as viewed from above.

  In the fixed valve body 62D, θc1 is larger than θh1. θh2 (not shown) is smaller than 90 °. θ c2 (not shown) is smaller than 90 °.

  In the fixed valve body 62D, the upper opening line 80a has a straight portion 80c at the water-side end. The straight line portion 80c is substantially parallel to the vertical center line L1.

  In the fixed valve body 62D, the upper opening line 82a has a straight portion 82c at the end of the hot water side. The straight line portion 82c is substantially parallel to the vertical center line L1.

  FIG. 21 is a plan view of the fixed valve body 62E according to the sixth embodiment as viewed from above.

  In the fixed valve body 62E, θc1 is larger than θh1. θh2 (not shown) is greater than 90 °. θ c2 (not shown) is larger than 90 °.

  In the fixed valve body 62E, the upper opening line 80a has a straight portion 80c at the water-side end. The straight line portion 80c is substantially parallel to the vertical center line L1.

  In the fixed valve body 62E, the upper opening line 82a has a straight portion 82c at the end of the hot water side. The straight portion 82c is not substantially parallel to the longitudinal center line L1. The straight line portion 82c is inclined so as to move away from the vertical center line L1 as the distance from the center point VC increases.

  FIG. 22A is a plan view of the lower member 88 to which the flow control member 61 is attached. 22B is a cross-sectional view taken along line AA in FIG. 22A, and FIG. 22C is a cross-sectional view taken along line BB in FIG.

  The flow straightening member 61 is accommodated in the flow passage forming recess 94. The entire flow regulating member 61 is accommodated in the flow path forming recess 94.

  The rectifying member 61 is a member formed of a wire mesh (see FIG. 11). The straightening member 61 is a cage-like member made of a wire mesh as a whole. The rectifying member 61 is fitted in the flow path forming recess 94. The rectifying member 61 is fixed to the flow path forming recess 94 by a restoring force accompanying elastic deformation (see FIG. 22C). As shown in FIGS. 22B and 22C, the rectifying member 61 has a bent portion 61a. The bent portion 61 a is provided around the rectifying member 61. The bent portion 61a is easily elastically deformed. The rectifying member 61 is fitted in the flow path forming recess 94 while compressing and deforming the bent portion 61a.

  In FIGS. 22B and 22C, a single-layer cross section is shown as the rectifying member 61. However, as described above, the rectifying member 61 is actually formed of a metal mesh.

  Due to the permeation of the rectifying member 61, the disturbance of the water flow is suppressed. As a result, abnormal noise is suppressed.

  FIG. 23 is a plan view for explaining the lever left and right position. The lever handle 14 can turn left and right from the hot water side limit ML to the water side limit MR. The double arrow RT1 indicates a water region where only water from the water inflow hole 82 is discharged. The double arrow RT1 indicates a water region where only water from the water inflow hole 82 is discharged. Double arrow RT2 shows a hot and cold water mixing area. A double-headed arrow RT3 indicates a hot water region where only hot water from the hot water inflow hole 80 is discharged. The angle of the hot water region RT3 may be 0 °. That is, only the hot water may be discharged only when the lever left / right position is at the hot water side limit ML.

  In the hot water mixing valve 10 according to the first embodiment, the angle of the water region RT1 is 55 °, the angle of the hot water mixing region RT2 is 25 °, and the angle of the hot water region RT3 is 10 °.

  In the embodiment of FIG. 23, the left and right rotation range RF of the lever handle 14 is symmetrical with respect to the front position C1. The left and right rotation range RF may not be symmetrical with respect to the front position C1. The left-right rotation range RF is an angle range from the hot water side limit ML to the water side limit MR.

  In the embodiment of FIG. 23, the boundary position K1 between the water region RT1 and the hot water mixing region RT2 is located on the hot water side of the front position C1. When the lever left and right position is on the hot water side relative to the boundary position K1, the hot water is mixed.

  In this embodiment, when the lever left and right position is at the front position C1, only water is discharged. In any of the second to sixth embodiments, only the water is discharged when the lever left-right position is at the front position C1. Therefore, since only water is discharged at the front position C1 with high frequency, unintentional mixing of hot water is suppressed.

  In the embodiment of FIG. 23, the boundary position K1 between the water region RT1 and the hot water mixing region RT2 is located on the hot water side of the front position C1. Therefore, even when the lever left-right position is slightly shifted from the front position C1 to the hot water side, only water can be discharged. For this reason, unintentional mixing of hot water is further suppressed, contributing to energy saving.

  What is indicated by a double arrow θk in FIG. 23 is an angle between the front position C1 and the boundary position K1. From the viewpoint of energy saving, the angle θk is preferably 1 degree or more, more preferably 3 degrees or more, and further preferably 5 degrees or more. The angle θ k is preferably 20 degrees or less, more preferably 15 degrees or less, and still more preferably 10 degrees or less, from the viewpoint of enhancing the operability of switching from water to hot and cold water. In the hot and cold water mixing valve 10 according to the first embodiment, the angle θk is 5 °.

  In each embodiment of the present application, the central angle θ1 is large. By increasing the central angle θ1, abnormal noise generated in the hot and cold water mixing area can be suppressed.

  In the hot and cold water mixing region, there is an aspect in which the overlapping area Sh between the hot water inflow hole 80 and the flow path forming recess 94 is narrowed. In this case, the balance between the flow of hot water and water is deteriorated, resulting in disturbance of the water flow and cavitation. In general, since the hot water supplied to the hot water inflow hole 80 is supplied from the hot water supply device, the water pressure in the hot water inflow hole 80 is often lower than the water pressure in the water inflow hole 82. Usually, the water pressure at the hot water inflow hole 80 is about 3 to 4 times the water pressure at the water inflow hole 82. The pressure difference between the hot water and the cold water further worsens the balance of the flow of hot water and water, and the turbulence and cavitation of the water flow are more likely to occur. This tendency is remarkable when the discharge amount is maximum. Turbulence and cavitation in the water flow produce noise.

  The flow rate in the hot and cold water mixing area can be reduced by increasing the central angle θ1. This reduction in flow rate suppresses turbulence and cavitation in the water flow and can reduce noise.

  Conventionally, in the hot and cold water mixing region, the water temperature may be difficult to increase due to the above-described hot water pressure difference. The flow of water can be suppressed in the hot and cold water mixing area by increasing the central angle θ1. As a result, the water temperature can be easily raised. The large central angle θ1 also contributes to the adjustability of the water temperature.

  The central angle θ1 is preferably 20 ° or more, more preferably 23 ° or more, and still more preferably 26 ° or more from the viewpoint of suppressing abnormal noise in the hot and cold water mixing region and controlling the water temperature. If the central angle θ1 is too large, the angle range of the hot and cold water mixing region RT2 may be reduced, and the controllability of the water temperature may be reduced. In this respect, the central angle θ1 is preferably 35 ° or less, more preferably 33 ° or less, and still more preferably 31 ° or less.

  As described above, the central angle θ is the sum of θc1, θh1, θc2, and θh2. 0.05 or more are preferable, 0.06 or more are more preferable, and 0.07 or more are still more preferable from a viewpoint of suppression of the noise in the hot and cold water mixing area | region, and the adjustability of a water temperature. If the central angle θ1 is too large, the angle range of the hot and cold water mixing region RT2 may be reduced, and the controllability of the water temperature may be reduced. In this respect, θ1 / θ is preferably equal to or less than 0.15, more preferably equal to or less than 0.14, and still more preferably equal to or less than 0.13.

  0.4 or more is preferable, 0.5 or more is more preferable, and 0.6 or more is still more preferable from the viewpoint of suppression of abnormal noise in the hot and cold water mixing region and controllability of the water temperature. When the central angle θc1 is excessive, it is difficult to discharge only water at the front position C1. In this respect, θc1 / θ1 is preferably equal to or less than 1.0, more preferably equal to or less than 0.9, and still more preferably equal to or less than 0.8.

  From the viewpoint of securing the central angle θ1, the central angle θh1 preferably exceeds 0 °. In other words, the half straight line Lh1 is preferably located on the hot water side of the vertical center line L1 (see FIG. 16). For the same reason, the central angle θh1 is preferably 5 ° or more, more preferably 7 ° or more, and still more preferably 9 ° or more. In order to suppress the turbulence of the water flow, it is preferable to ensure the mixing ratio of hot water in the hot water / mixing region RT2. In this respect, the central angle θh1 is preferably 15 ° or less, more preferably 13 ° or less, and still more preferably 11 ° or less.

  In order to suppress the flow rate in the hot / cold water mixing region RT2, it is effective to suppress the flow rate on the water side where the water pressure is high. In this respect, the central angle θc1 is preferably equal to or greater than 13 °, more preferably equal to or greater than 15 °, and still more preferably equal to or greater than 17 °. From the viewpoint of enhancing the controllability of the water temperature, the central angle θc1 is preferably 23 ° or less, more preferably 21 ° or less, and still more preferably 19 ° or less.

  In order to suppress the flow rate in the hot / cold water mixing region RT2, it is effective to suppress the flow rate on the water side where the water pressure is high. In this respect, θc1 / θh1 is preferably equal to or greater than 2.0, and more preferably equal to or greater than 2.3. From the viewpoint of water temperature controllability, an excessive θ c1 is not preferable. In this respect, θc1 / θh1 is preferably equal to or less than 3.0, and more preferably equal to or less than 2.8.

  As described above, points PW1 and PW2 are defined for the water inflow hole 82, and points PH1 and PH2 are defined for the hot water inflow hole 80 (see FIG. 16). In plan view, the length of a line segment connecting point PW1 and point PW2 is defined as a slope width W1 (not shown), and the length of a line segment connecting point PH1 and point PH2 is a slope width W2 (not shown) Is defined. When the overlapping area (hot water side overlapping area Sh) between the hot water inflow hole 80 and the flow path forming concave portion 94 is reduced, turbulence and cavitation of the water flow are easily generated, which causes abnormal noise. At that time, as the direction of the flow of the hot water from the hot water inflow hole 80 to the flow passage forming concave portion 94 is closer to the vertical direction, the flow of the hot water tends to be blocked. Further, the hot water flow is more easily inhibited as the water flow from the water inflow hole 82 to the flow path forming recess 94 is directed toward the hot water inflow hole 80 at that time.

  Therefore, the inclination width W1 in the water inflow hole 82 is preferably smaller than the inclination width W2 in the hot water inflow hole 80. From this viewpoint, W1 / W2 is preferably 1.0 or less, and more preferably 0.9 or less. If W1 / W2 is too small, it will be difficult to configure the water inflow holes 82 and the hot water inflow holes 80 within the range of a limited fixed valve area. In this respect, W1 / W2 is preferably equal to or greater than 0.6, and more preferably equal to or greater than 0.7.

  In addition, from the viewpoint of securing the amount of water required in a limited fixed valve area, it is preferable that the point PW2 is located on the hot water side (hot water inflow hole side) from the point PW1. Further, from the viewpoint of securing the amount of hot water required within the limited fixed valve area, the point PH2 is preferably located on the water side (water inflow hole side) from the point PH1.

  As shown in the enlarged portion of FIG. 16, the distance between the point PH2 and the point PW2 is defined as the shortest distance d. By increasing the shortest distance d, the flow rate in the hot and cold water mixing area can be reduced. This reduction in flow rate suppresses turbulence and cavitation in the water flow and can reduce noise. In this respect, the shortest distance d is preferably 3 mm or more, more preferably 3.1 mm or more, and still more preferably 3.2 mm or more. From the viewpoint of the flow rate in the hot and cold water mixing region, the shortest distance d is preferably 3.8 mm or less, and more preferably 3.7 mm or less.

  As an enlarged portion in FIG. 16 shows, an intersection point of a straight line Ld connecting the point PH2 and the point PW2 with the vertical center line is taken as P1, and a distance between the point PH2 and the point P1 is taken as d1. The distance between the point PW2 and the point P1 is d2. As described above, in the hot and cold water mixing area, the flow balance between hot water and water becomes poor, and water flow disturbance and cavitation may occur. Furthermore, as described above, the balance between the flow of hot water and water becomes worse due to the difference in hot water pressure. From the viewpoint of improving this balance and suppressing abnormal noise, the distance d1 is preferably not more than the distance d2. In other words, the distance d1 is preferably the same as the distance d2 or smaller than the distance d2. That is, it is preferable that d1 ≦ d2 be established. Furthermore, it is more preferable that the distance d1 be smaller than the distance d2 (d1 <d2).

  In light of suppressing abnormal noise, d1 / d2 is preferably equal to or less than 0.9, more preferably equal to or less than 0.7, and still more preferably equal to or less than 0.5. If d1 / d2 is too small, temperature controllability may be reduced. In this respect, d1 / d2 is preferably equal to or greater than 0.1, more preferably equal to or greater than 0.15, and still more preferably equal to or greater than 0.2.

  Table 1 below shows the result of measuring the sound by changing the shortest distance d in the fixed valve body 62 of the first embodiment. Sound was measured every 5 ° when the lever left-right position was in the range of −40 ° to 0 °. The unit of measurement value is dB (decibel).

The measured fixed valve bodies 62 are the following six types.
(1) Fixed valve body 62-1: The shortest distance d is 2.0 mm (d1 is 1 mm, d2 is 1 mm)
(2) Fixed valve body 62-2: The shortest distance d is 2.5 mm (d1 is 1 mm, d2 is 1.5 mm)
(3) Fixed valve body 62-3: The shortest distance d is 3.0 mm (d1 is 1 mm, d2 is 2 mm)
(4) Fixed valve body 62-4: The shortest distance d is 3.5 mm (d1 is 1 mm, d2 is 2.5 mm)
(5) Fixed valve body 62-5: shortest distance d is 3.8 mm (d1 is 1 mm, d2 is 2.8 mm)
(6) Fixed valve body 62-6: shortest distance d is 4.0 mm (d1 is 1 mm, d2 is 3 mm)

  The flow rate when the lever left-right position is −5 ° (hot water 5 °) is 7.4 liters / minute for the fixed valve body 62-1, 7.3 liters / minute for the fixed valve body 62-2, and the fixed valve body 62. -3 for 7.15 liters / minute, fixed valve body 62-4 for 6.7 liters / minute, fixed valve body 62-5 for 6.2 liters / minute, fixed valve body 62-6 for 5.8 liters / minute Minutes.

  As described above, in the preferable range of the shortest distance d, the flow rate is secured while suppressing abnormal noise. In addition, this result is a result when the water pressure of the hot water inflow hole 80 and the water inflow hole 82 is both set to 0.45 MPa. In the actual use state, the above-described difference in hot and cold water pressure exists, so the difference between the data is considered to be even greater.

  Tables 2 and 3 show the hot water side overlapping area Sh and the water side overlapping area Sc in the first embodiment. Table 2 and Table 3 show the hot water side overlapping area Sh and the water side overlapping area when the lever left and right position is changed from the water side limit MR to the hot water side limit ML while the lever front and back position is the maximum discharge position. Sc is shown. Furthermore, in Tables 2 and 3, the total area S is shown. The total area S is the sum of the hot water side overlapping area Sh and the water side overlapping area Sc.

  Table 2 shows the values when the lever left-right position is from -50 ° to 0 °. FIG. 3 shows values when the lever left / right position is from 0 ° to 50 °. The lever left and right position is indicated by an angle from the front position C1 and is a negative value on the hot water side of the front position C1, and a positive value on the water side of the front position C1. At the position C1, the lever left-right position is 0 °.

  FIG. 24 is a graph showing the hot water side overlapping area Sh and the water side overlapping area Sc in the first embodiment. FIG. 24 is a graph of the data shown in Tables 2 and 3. In the bar graph of FIG. 24, the water side overlapping area Sc is shown in black, and the hot water side overlapping area Sh is shown in hatching.

  In the embodiment of FIG. 24, the lever left / right position of 0 ° is the water region RT1. The −5 ° lever left / right position is the water area RT1. The left-right position of the −10 ° lever is the hot and cold mixing region RT2. The left / right position of the −15 ° lever is the hot and cold water mixing region RT2. The left-right position of −20 ° lever is the hot / cold water mixing region RT2. The total area S is maximized in the water region RT1. The lever left and right position of 0 ° or more is the water region RT1. When the lever left / right position is 5 °, the total area S is not maximum. When the lever left / right position is 10 °, the total area S is not maximum. When the lever left / right position is 15 °, the total area S is not maximum. When the lever left / right position is 20 °, the total area S is maximum. When the lever left / right position is 25 °, the total area S is maximum.

  As shown in FIG. 24, in the first embodiment, the area S of the hot and cold water mixing area is suppressed in the vicinity of the front position C1. As described above, when the overlapping area Sh is small, the balance of the flow of the hot water and the water becomes bad, and the disturbance of the water flow and cavitation are likely to occur. However, in the present embodiment, since the area S is suppressed in the hot water mixing region near the front position C1, the flow rate is suppressed. As a result, the turbulence of the water flow and cavitation are reduced, and the generation of abnormal noise is suppressed.

  Moreover, in this 1st Embodiment, since the water side duplication area Sc is suppressed in the hot and cold water mixing area | region near the front position C1, the balance of the flow of hot water and water is improved. For this reason, even when there is a hot water pressure difference, the mixing ratio of hot water can be easily increased, and the hot water temperature tends to rise.

  In the present application, a maximum value Smax and a minimum value Smin are defined. When changing the lever left / right position from the water side limit MR to the hot water side limit ML while keeping the lever back and forth position at the maximum discharge position, the maximum value of the total area S is Smax and the minimum value of the total area S is Smin is there.

  In the present application, the water-side overlapping area Sc when the total area S becomes the minimum value Smin is defined as Sc1. The hot water overlapping area Sh when the total area S becomes the minimum value Smin is defined as Sh1.

  In the first embodiment, the left and right position of the lever when the total area S becomes the minimum value Smin is the hot and cold water mixing area (see FIG. 24). As described above, in the hot water / water mixing area and in the phase where the hot water side overlapping area Sh is small, abnormal noise is likely to occur due to the disturbance of the water flow or the like. By setting the lever left / right position when the total area S becomes the minimum value Smin in the hot and cold water mixing area, it is possible to suppress the flow rate in the phase where abnormal noise is likely to occur.

  In the first embodiment, the lever left-right position when the total area S is the minimum value Smin is −10 °. The lever left and right position is in the hot and cold water mixing area.

  0.70 or less is preferable, as for Smin / Smax, from a viewpoint of suppressing a flow volume in the situation which noise is easy to generate, 0.60 or less is more preferable, and 0.55 or less is still more preferable. From the viewpoint of securing the flow rate, Smin / Smax is preferably 0.3 or more, more preferably 0.4 or more, and still more preferably 0.5 or more.

  The balance between hot water and water is improved by suppressing the flow rate from the water inflow hole 82 in a situation where abnormal noise is likely to occur. In consideration of the pressure difference between the hot and cold water, it is effective to control the flow rate on the water side. By suppressing the flow rate on the water side, abnormal noise is suppressed and the rise of the water temperature becomes easy. From these viewpoints, Sc1 / Smax is preferably 0.50 or less, more preferably 0.47 or less, and still more preferably 0.44 or less. From the viewpoint of securing the flow rate, Sc1 / Smax is preferably 0.2 or more, more preferably 0.3 or more, and still more preferably 0.4 or more.

  It was found that, among the hot and cold water mixing regions, particularly the noise is likely to occur when the Sh / Smax is 0.50 or less. Since the hot water pressure difference is usually 3 to 4 times, when the Sh / Smax is 0.50 or less, the flow of hot water is small and turbulence tends to occur. From the viewpoint of suppressing turbulent flow, when the left / right position of the lever when Sh / Smax is 0.50 is the position X, the following definition is preferable. That is, S / Smax is preferably 0.70 or less, more preferably 0.60 or less, and more preferably 0.55 or less over the entire range from the boundary position K1 (see FIG. 23) to the position X. Further preferred. Here, the total area S is the total area when the lever front-rear position is the maximum discharge position.

  From the viewpoint of securing the flow rate, the following provisions are preferable. That is, S / Smax is preferably 0.3 or more, more preferably 0.4 or more, and still more preferably 0.5 or more in the entire range from the boundary position K1 to the position X of the lever left / right position. Here, the total area S is the total area when the lever front-rear position is the maximum discharge position.

  Turbulent flow is likely to occur when the mixing ratio of hot water is low in the hot and cold water mixing area. From this point of view, it is preferable to suppress the flow rate in the range where the lever left and right position is in the range of -20 ° to -5 °.

  The total area S when the lever front-rear position is the maximum discharge position and the lever left-right position is −5 ° is S5. In light of suppressing abnormal noise, S5 / Smax is preferably equal to or less than 0.70, more preferably equal to or less than 0.60, and still more preferably equal to or less than 0.55. From the viewpoint of securing the flow rate, S5 / Smax is preferably 0.3 or more, more preferably 0.4 or more, and still more preferably 0.5 or more.

  The total area S when the lever front-rear position is the maximum discharge position and the lever left-right position is −10 ° is S10. In light of suppressing abnormal noise, S10 / Smax is preferably equal to or less than 0.70, more preferably equal to or less than 0.60, and still more preferably equal to or less than 0.55. From the viewpoint of securing the flow rate, S10 / Smax is preferably 0.3 or more, more preferably 0.4 or more, and still more preferably 0.5 or more.

  The total area S when the lever front-rear position is the maximum discharge position and the lever left-right position is −15 ° is S15. In light of suppressing abnormal noise, S15 / Smax is preferably equal to or less than 0.70, more preferably equal to or less than 0.60, and still more preferably equal to or less than 0.55. From the viewpoint of securing the flow rate, S15 / Smax is preferably 0.3 or more, more preferably 0.4 or more, and still more preferably 0.5 or more.

  The total area S when the lever front-back position is the maximum discharge position and the lever left-right position is -20 ° is S20. In light of suppressing abnormal noise, S20 / Smax is preferably equal to or less than 0.70, more preferably equal to or less than 0.62, and still more preferably equal to or less than 0.58. From the viewpoint of securing the flow rate, S20 / Smax is preferably 0.3 or more, more preferably 0.4 or more, and still more preferably 0.5 or more.

  From the viewpoint of suppressing turbulent flow, Sc1 / Sh1 is preferably 5.5 or less, more preferably 5.0 or less, and even more preferably 4.5 or less. From the viewpoint of an appropriate water temperature, Sc1 / Sh1 is preferably 2.0 or more, more preferably 2.5 or more, and still more preferably 3.0 or more.

  The hot water overlapping area Sh when the lever front-rear position is the maximum discharge position and the lever left-right position is −10 ° is Sh10. The water side overlapping area Sc when the lever front-rear position is the maximum discharge position and the lever left-right position is −10 ° is Sc10. From the viewpoint of suppressing turbulent flow, Sc10 / Sh10 is preferably 5.5 or less, more preferably 5.0 or less, and even more preferably 4.5 or less. From the viewpoint of an appropriate water temperature, Sc10 / Sh10 is preferably 2.0 or more, more preferably 2.5 or more, and still more preferably 3.0 or more.

  The hot water overlapping area Sh when the lever front-rear position is the maximum discharge position and the lever left-right position is −15 ° is Sh15. The water side overlapping area Sc when the lever front-rear position is the maximum discharge position and the lever left-right position is −15 ° is Sc15. From the viewpoint of suppressing turbulent flow, Sc15 / Sh15 is preferably 2.4 or less, more preferably 2.0 or less, and still more preferably 1.6 or less. From the viewpoint of an appropriate water temperature, Sc15 / Sh15 is preferably 1.0 or more, more preferably 1.1 or more, and still more preferably 1.2 or more.

  The hot water side overlapping area Sh when the lever front-rear position is the maximum discharge position and the lever left-right position is −20 ° is Sh20. The water side overlapping area Sc when the lever front-rear position is the maximum discharge position and the lever left-right position is −20 ° is Sc20. From the viewpoint of suppressing turbulent flow, Sc20 / Sh20 is preferably 1.1 or less, more preferably 1.0 or less, and still more preferably 0.8 or less. From the viewpoint of an appropriate water temperature, Sc20 / Sh20 is preferably 0.2 or more, more preferably 0.3 or more, and still more preferably 0.4 or more.

  In each embodiment described above, the upper opening line (upper opening line 80a and upper opening line 82a) of the inflow hole is asymmetric with respect to the longitudinal center line L1. However, it is not limited to this configuration. The upper opening line (upper opening line 80a and upper opening line 82a) of the inflow hole may be symmetric with respect to the vertical center line L1. Therefore, for example, the above reference example is not necessarily excluded from the present invention.

  Even if the upper opening line of the inflow hole is symmetrical, it is possible to reduce the flow rate in the above-mentioned phase where abnormal noise is likely to occur. For example, the hole portion B1 can be widened while maintaining the symmetry. Further, the flow rate is not determined only by the form of the upper opening lines (80a, 82a). It is also possible to control the flow rate in the above-described situation where abnormal noise is likely to occur, depending on the shape of the side surfaces of the hot water inflow hole 80 and the water inflow hole 82 and the lower opening lines 80b and 82b. Such controlled flow configurations may also be included in the present invention.

  Resin and a metal are illustrated as a material of the said lever shaft. This resin includes a fiber reinforced resin. From the viewpoint of suppressing water corrosion, stainless alloys and resins are preferred. In the above embodiment, a stainless steel alloy was used.

  Resin and a metal are illustrated as a material of the upper side member of a movable valve body. This resin includes a fiber reinforced resin. If metal slides during lever operation, unpleasant noise may be generated. From the viewpoint of avoiding unpleasant noise, resin is preferable as the material of the upper member. Moreover, the manufacturing cost as the whole movable valve body is suppressed by making this upper side member into resin. In the said embodiment, POM resin which does not contain a reinforced fiber was used.

  Examples of the material of the lower member of the movable valve body include resin (including fiber reinforced resin), metal, and ceramic. From the viewpoint of wear resistance in sliding with the fixed valve body, ceramic is preferred. This ceramic is also preferable from the viewpoints of corrosiveness to water, strength and durability. In the above embodiment, ceramic is used.

  Examples of the material of the fixed valve include resin (including fiber reinforced resin), metal and ceramic. From the viewpoint of wear resistance in sliding with the movable valve body (lower member), ceramic is preferable. This ceramic is also preferable from the viewpoints of corrosiveness to water, strength and durability. In the above embodiment, ceramic is used.

  Resin and a rubber material (vulcanized rubber) are illustrated as a material of packing and an O-ring. Flexibility and stretchability increase the sealability. In addition, the stretchability improves assemblability, and manufacturing errors (such as dimensional errors) can be mitigated. From these viewpoints, a rubber material is preferable. In the above embodiment, a rubber material was used.

  Examples of the material of the base body include resin (including fiber reinforced resin) and metal. From the viewpoint of avoiding unpleasant noise and strength, a fiber reinforced resin is preferable, and a glass fiber reinforced resin is more preferable. In the above embodiment, glass fiber reinforced PPS resin was used.

  When resin is used as a material of each said member, POM resin and PPS resin are preferable. POM resin has little time-dependent change of mechanical properties (tensile strength etc.) in use over a long time and in a wide temperature range. Moreover, the POM resin is excellent in fatigue resistance against repeated stress loads and has good sliding properties. Furthermore, in POM resin, the dimensional change due to water absorption is small. PPS resin is excellent in strength and rigidity, and is excellent in wear resistance. Furthermore, PPS resin has a small shrinkage rate during molding and can achieve high dimensional accuracy. In order to further enhance these properties, the resin is preferably reinforced with short fibers such as glass fibers.

  The present application also describes other inventions different from the invention according to the claims (including the independent claims). Each form, member, configuration and combination thereof described in the claims and the embodiments of the present application are recognized as inventions based on the effects of the respective ones.

  The respective forms, members, configurations and the like shown in each of the above embodiments do not have all the forms, members or configurations of these embodiments, but individually include the invention according to the claims of the present application. It can be applied to all described inventions.

  The present invention can be applied to hot and cold water mixing taps for any use.

DESCRIPTION OF SYMBOLS 10 ... Hot water / water mixing tap 12 ... Mixing tap main body 14 ... Lever handle 16 ... Discharge part 18 ... Hot water introduction pipe 20 ... Water introduction pipe 22 ... Discharge pipe 28 ... Switch button 30 ··· Display
38 ... Lever assembly 40 ... Moving body 42 ... Housing 44 ... Rotating body 46 ... Lever 48 ... Lever shaft 50 ... Left and right click elastic member 52 ... Left and right click For contact 54: shaft 56: contact for back and forth click 58: elastic member for back and forth click 60: movable valve body 61: current collector 62, 62A, 62B, 62C, 62D , 62 E: fixed valve body 62 h: fixed valve body of reference example 64: packing 66, 67: O ring 68: base body 80: hot water inflow hole 80 a: hot water inflow Upper opening line 80b ··· lower opening line of hot water inlet 82 · · · water inlet 82a · upper opening line of water inlet 82b · lower opening line of water inlet 84 · · · outflow Hole 84a: Upper opening line of outflow hole 84b: Under outflow hole Open line 86 ... Upper member of movable valve element 88 ... Lower member of movable valve element 94 ... Flow path forming recess L1 ... Vertical center line of fixed valve element VC ... of fixed valve element Center point B1 ... inter-hole area MR ... water side limit ML ... hot water side limit RF ... right and left turn range of lever handle C1 ... front position RT1 ... water area RT2 ... Hot and cold water mixing area RT3 ... hot water area

Claims (6)

A fixed valve body having an inlet and outlet formed of a water inlet and a hot water inlet;
A movable valve body having a flow path forming recess for communicating the inflow hole and the outflow hole, and capable of sliding on the fixed valve body;
A lever handle capable of moving the movable valve body;
Equipped with
The discharge amount is adjusted by changing the lever back and forth position by rotating the lever handle back and forth.
A hot and cold water mixing faucet configured to adjust the discharge temperature by changing the lever left and right position by turning the lever handle left and right,
The lever left and right position has a water area where only water from the water inflow hole is discharged, a hot water area where only hot water from the hot water inflow hole is discharged, and a hot water mixing area.
The overlapping area of the water inflow hole and the flow path forming recess is taken as a water side overlapping area Sc,
The overlapping area of the hot water inflow hole and the flow passage forming recess is taken as the hot water side overlapping area Sh,
The total area of the area Sc and the area Sh is S,
The total area S has a maximum value Smax and a minimum value Smin when changing the lever left and right position from the water side limit to the hot water side limit while keeping the lever front and back position at the maximum discharge position,
The left and right position of the lever when the total area S is the minimum value Smin is in the hot and cold water mixing area,
A hot / cold mixing tap having Smin / Smax of 0.70 or less. When the water side overlapping area Sc when the total area S is the minimum value Smin is Sc1:
The hot / cold mixing tap according to claim 1, wherein Sc1 / Smax is 0.50 or less. A fixed valve body having an inlet and outlet formed of a water inlet and a hot water inlet;
A movable valve body having a flow path forming recess for communicating the inflow hole and the outflow hole, and capable of sliding on the fixed valve body;
A lever handle capable of moving the movable valve body;
Equipped with
The discharge amount is adjusted by changing the lever back and forth position by rotating the lever handle back and forth.
A hot and cold water mixing faucet configured to adjust the discharge temperature by changing the lever left and right position by turning the lever handle left and right,
A hot and cold water mixing tap in which a central angle θ1 of a hole portion between the water inlet hole and the hot water inlet hole is 20 ° or more on the upper surface of the fixed valve body. The upper surface of the fixed valve body is a longitudinal centerline line coincides with the center line of the lever handle of the stationary valve member when the lever handle in a plan view is in the front position, the longitudinal of said stationary valve member The central angle between the center line and the most hot water side point of the upper opening line of the water inflow hole is θ c1, and the distance between the vertical center line and the most water side point of the upper water opening line The center angle of the water inlet hole is θc2, the center angle of the hot water inlet hole is θh2,
When the sum of the central angles θc1, θh1, θc2 and θh2 is θ,
The hot / cold mixing tap according to claim 3, wherein θ1 / θ is 0.05 or more and 0.15 or less.   The hot and cold water mixing valve according to claim 4, wherein θc1 / θ1 is 0.4 or more and 1.0 or less. The hot and cold water mixing tap according to any one of claims 1 to 5 , wherein only water is discharged when the lever left-right position is at the front position.

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