JP4591860B2 - Hot water tap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot and cold water mixing tap having an automatic temperature adjustment function, and more particularly to an apparatus configuration in which the position of a valve element is optimized by a temperature sensing element so as to stabilize the mixed water temperature.
[0002]
[Prior art]
In the prior art, the structure of a seal portion that shuts off the hot water flow path and the water flow path of the housing and the housing, which influences the size of the valve body in the radial direction, is described in, for example, Japanese Patent Laid-Open No. 8-75037. As described above, two O-rings having different diameters are mounted on substantially the same surface in the circumferential direction of the housing and the valve body, with the same center. FIG. 5 shows a longitudinal sectional view of a conventional example. In the housing 1, an O-ring 19 accommodated in a groove 18 provided on the outer peripheral wall of the housing 1 and perpendicular to the axial direction of the housing 1 includes a bottom peripheral surface of the groove 18 and a faucet body 30. The water inlet a and the hot water inlet b flowing into the housing 1 are shut off so as to prevent hot water and water from mixing outside the housing 1.
[0003]
On the other hand, the blocking structure for partitioning the water and hot water flowing into the valve body 4 is housed in a groove 20 provided on the outer wall of the valve body 4 at the approximate center in the axial direction of the length of the valve body and vertically in the axial direction. The formed O-ring 21 is in contact with the bottom peripheral surface of the groove 20 and the inner peripheral surface of the housing 1 to block hot water and water flowing into the valve body 4.
[0004]
That is, the structure of the housing and the valve body provided for the purpose of blocking the water flow path and the hot water flow path in the prior art has a vertical circumference centered on the axis of the valve body 4 at the approximate center position of the length of the valve body 4. Two different O-rings 20 and 21 are arranged on the surface.
[0005]
FIG. 4 shows a cross-sectional view of the main part showing the configuration of a conventional valve body and housing. Here, in terms of the components constituting the outer diameter A of the housing 1 around the valve body 4, the inner diameter B of the O-ring groove provided on the outer wall of the valve body 4 and the depth of the O-ring groove 20. It is composed of four elements: a thickness dimension C, a thickness dimension D between the outer diameter of the valve body 4 and an O-ring groove 18 provided in the housing 1, and a depth dimension E of the O-ring groove 18 of the housing. Has been.
[0006]
[Problems to be solved by the invention]
In general, in a hot and cold water mixing tap that has an automatic temperature control function and a valve body that adjusts the amount of hot water and has a hollow cylindrical shape, the point of greatest pressure loss that affects the discharge flow rate is the valve body and the water valve seat. It is often the total area of a cylindrical gap provided between the water valve seat and the conventional example taken up in this case. Here, the total area of a cylindrical gap provided between the valve body and the hot water valve seat and the water valve seat for flowing hot water and water into the valve body is defined as the opening area, and the relationship with the discharge flow rate is as follows: The concept will be described with reference to FIG. In FIG. 4, the valve body 4 is in a state of being seated on the water valve seat 2. The opening area is represented by the product of the circumferential length of the outer diameter F of the valve body and the stroke G that the valve body can move in the axial direction in order to adjust the amount of flowing hot water. Speaking of the outer diameter of the valve body, the seat portion 22 having a ring shape of about 1 mm width provided on both end faces of the valve body perpendicular to the axis of the valve body and blocking hot water and water flowing into the valve body. It shall be equal to the outer diameter.
The circumferential length L of the maximum diameter F of the valve body is expressed by the following equation (1).
[0007]
L = F × π (1)
[0008]
The opening area S is expressed by equation (2), which is obtained by multiplying the equation 1 by the stroke G of the valve disc.
S = L × G = F × π × G (2)
[0010]
The opening area S, that is, the area where hot water and water can flow into the valve body. That is, the larger the area, the more the pressure loss of the valve body is relaxed and a larger flow rate passes through the valve body, leading to an increase in the discharge flow rate from the hot and cold water mixing tap.
[0011]
In this conventional structure, when the main body of the hot and cold water mixing plug is replaced with the same housing and the discharge flow rate is increased, that is, when the outer diameter of the housing is determined, the above-described valve body is used. 4, an inner diameter dimension B of the O-ring groove provided on the outer wall 4, a depth dimension C of the O-ring groove 20, and a wall between the outer diameter of the valve body 4 and the O-ring groove 18 provided in the housing 1. Since the components of the four parts of the thickness dimension D and the depth dimension E of the O-ring groove 18 of the housing are necessary, the outer diameter F of the valve body is increased to increase the opening area, and the discharge is performed. It was structurally difficult to increase the amount of water.
[0012]
An object of the present invention is to provide a flow rate to be discharged from a hot and cold water mixing tap without changing the mounting and fixing dimensions of the housing having an automatic temperature control function provided in the hot and cold water mixing tap body, that is, without changing the outer diameter of the conventional housing. It is an object to provide a housing having an automatic temperature control function capable of increasing the number of times.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a cylindrical housing part, a water inlet and a hot water inlet provided on the peripheral wall of the housing part at intervals in the axial direction, and the water inlet and the hot water flow. A substantially hollow cylindrical valve body which is incorporated so as to be movable in the axial direction between the inlet, a water valve seat facing one end surface in the axial direction of the valve body on the water inlet side, and on the hot water inlet side In the mixed water flow path from the water valve seat to the mixed water outlet, the hot water valve seat facing the other end surface in the axial direction of the valve body, the mixed water outlet opened in the peripheral wall of the housing on the downstream side of the water valve seat A temperature sensing element that urges the valve body toward the hot water valve seat side, and a spring that is connected to a temperature setting operation portion and biases the valve body toward the water valve seat side. In the hot and cold water mixer tap where the housing is attached to the main body of the hot and cold water mixer tap in the form of a cartridge, The housing is vertically divided in the axial direction between the water inlet and the hot water inlet, and the divided end faces are opposed to each other at regular intervals in the axial direction, and the valve is positioned between the end faces. And a connecting member for connecting the divided housings through the inner diameter portion of the valve body , and a sealing member for blocking the water inlet and the hot water inlet on the outer peripheral surface of the valve body. It was characterized by having.
[0014]
As a result, the sealing material that shuts off the hot water and water flowing into the housing and the sealing material that shuts off the hot water and water flowing into the valve body in contact with the outer peripheral surface of the valve body are the same parts, so that there is a conventional example. The wall thickness D of the peripheral wall of the housing in contact with the sealing material attached to the valve body is no longer necessary, and the unnecessary thickness can be increased in addition to the outer diameter of the valve body.
[0015]
As a result, the outer diameter of the valve body can be increased without changing the outer diameter of the conventional housing. As described above, the opening area through which hot water and water flow into the valve body is increased and discharged from the hot and cold water mixing tap. Can increase the flow rate.
[0016]
Furthermore, more particularly the sealing member is mounted on the outer peripheral surface of the valve body, the seal member for blocking the hot water flowing into the housing is mounted to the valve body, the outer diameter itself of the valve body it can be increased to almost the same dimension as the outer diameter of the housing, thereby increasing the outer diameter of the valve body further.
[0017]
Further, the present invention is characterized in that each of the divided housings is connected to the temperature setting spindle through a shaft bar that is integral with or connected to the temperature setting spindle. Since the shaft rod, which is a member for connecting the divided housings, is located in the vicinity of the central axis of the housing, each housing is provided opposite to each other in a ring-shaped place where the sealing material is located. Has no effect .
[0018]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a front longitudinal sectional view showing the structure of a hot and cold water mixing tap showing an embodiment of the present invention. In FIG. 1, a water inlet a and a hot water inlet b are opened on the peripheral wall of the housing 1 composed of a hot water side housing 1a and a water side housing 1b incorporated in the main body 30 of the hot and cold water mixing tap, respectively, at intervals in the axial direction. At the same time, a mixed water outlet c is opened on the downstream side communicating with the inlets a and b. The water inlet a communicates with the water chamber d in the housing 1, and similarly, the hot water inlet b and the mixed water outlet c communicate with the hot water chamber e and the mixing chamber f, respectively, and the mixed water passes through the mixing chamber f. Is discharged from the discharge end.
[0019]
Inside the housing 1, a water valve seat 2 and a hot water valve seat 3 are provided on the water inlet a side and the hot water inlet b side, respectively. And between these water valve seats 2 and hot water valve seats 3, a temperature regulating valve body 4 having a substantially H-shaped longitudinal section movable in the axial direction is incorporated. The valve body 4 has both ends in the axial direction as seating surfaces of the water valve seat 2 and the hot water valve seat 3, and a communication port 4b is opened in a partition wall 4a that partitions the water side and the hot water side. An annular sealing material 5 is incorporated around the valve body 4 at a position sandwiched between the hot water side housing 1a and the water side housing 1b, and this sealing material 5 is brought into close contact with the inner wall of the main body 30 to be water side. The hot water side is shut off.
[0020]
The interior of the housing 1 is partitioned into a water chamber d and a hot water chamber e by a valve body 4, and a mixing chamber f is formed downstream of these. Then, a sleeve 7 whose one end abuts against the partition wall 4a of the valve body 4 is incorporated from the mixing chamber f to the water chamber d. The sleeve 7 has an opening 7b for water formed by a fin-like portion 7a on the peripheral wall facing the water chamber d, communicates with the communication port 4b of the partition wall 4a, and communicates the water chamber d, the hot water chamber e, and the mixing chamber f. Water and hot water in a quantity ratio corresponding to the valve opening of the valve body 4 with respect to the water valve seat 2 and the hot water valve seat 3 are supplied to the mixing chamber f.
[0021]
The mixing chamber f incorporates a temperature sensitive element 8 having one end abutting against the inner wall of the water-side housing 1b and the other end fitted into the end face of the sleeve 7. The temperature sensing element 8 changes its length in response to the temperature of the mixed water passing through the mixing chamber f, and shifts the valve body 4 so that the temperature of the discharged mixed water is maintained at the set temperature. Has function. The temperature sensing element 8 is not limited to a shape memory alloy, but may be a temperature sensing element in which a shape memory element made of a synthetic resin or a wax having thermal expansion / contraction properties is enclosed.
[0022]
The position of the valve body 4 is set by a handle 11 connected to a spindle 9 inserted in the hot water side housing 1a. The spindle 9 rotates in conjunction with the rotation of the handle 11 and is connected to the valve body 4 via a guide 20 screwed to convert this rotational force into an axial force and a bias spring 10 that contacts the guide 20.
[0023]
The bias spring 10 incorporated in the hot water chamber e biases the valve body 4 in the direction opposite to the extending direction of the temperature sensing element 8. This bias spring 10 has a function of moving the valve body 4 to the water valve seat 2 side, and the position of the valve body 4 with respect to the temperature sensing element 8 that moves the valve body 4 to the hot water valve seat 3 side according to the mixing temperature. To balance.
[0024]
FIG. 2 is an exploded perspective view of the components shown in FIG. A spindle 9 is inserted from an open portion 23 provided at one end of the hot water side housing 1a, and a guide 20 for biasing the rotational force of the spindle 9 into an axial force, a bias, and the spindle shaft 9a formed integrally with the spindle 9 A spring 10 and a washer 12 are incorporated. Next, the sealing material 5 is attached to the periphery, and the valve body 4 coated with a lubricant around the sealing material 5 is passed through the spindle shaft 9a. Further, the water-side housing 1b incorporating the temperature sensitive element 8, the washer 13 and the sleeve 7 is passed through the spindle shaft 9a, and the groove 9b of the spindle shaft 9a is penetrated from the end surface of the water-side housing 1b, and is fixed to the groove 9b. The ring 14 is inserted and fixed, and the hot water side housing 1a and the water side housing 1b are connected to form the housing 1. Here, the sealing material 5 is configured to be sandwiched between end faces where the hot water side housing 1a and the water side housing 1b face each other, and a function of blocking the original water inlet a and the hot water inlet b of the housing 1 and a valve. It has two functions of blocking the water and hot water on the outer peripheral surface of the body 4.
[0025]
FIG. 3 is a longitudinal sectional view according to the second invention, in which a valve body 4 is arranged at a position sandwiched between the divided housings 1a and 1b, and is perpendicular to the central axis of the valve body 4 and centered on this axis. An annular groove 15 having an annular shape is provided, and an annular sealing material 16 that contacts and slides against the inner peripheral surface 17 of the main body 30 is disposed. The sealing material 16 has a function of blocking hot water and water flowing into the valve body 4 and a function of blocking the hot water inlet b and the water inlet a flowing into the housing 1. Thus, by sandwiching the valve body 4 itself between the divided housings, the outer diameter of the valve body 4 can be further increased, and a water passage area can be ensured larger than the configuration described in the first invention, resulting in pressure loss. Can be reduced, and the amount of water discharged can be further increased.
[0026]
The sealing material disposed in the annular space provided with the divided housings opposed to each other described in the present invention does not necessarily need to completely block the hot water channel and the water channel, and the sealing material is made of, for example, resin. Further, a slit groove may be provided, and some hot water and water may flow backward.
[0027]
Further, the shaft rod that connects the divided housings does not necessarily have to be integrated with the temperature setting spindle. For example, the shaft rod may be connected to the spindle by a screw or a resin claw.
[0028]
【The invention's effect】
According to the first invention, the sealing material for blocking hot water and water flowing into the housing and the sealing material for blocking the hot water and water flowing into the valve body in contact with the valve body are the same parts, so that there is a conventional example. The thickness of the peripheral wall of the housing itself in contact with the sealing material attached to the valve body is no longer necessary, and the unnecessary thickness can be added to the outer diameter of the valve body. The outer diameter of the valve body can be increased without changing the dimensions necessary for insertion and fixation into the mixing plug body. Therefore, when the outer diameter of the valve body increases, the water flow area through which hot water and water can flow into the valve body increases as described above, and the flow rate discharged from the hot and cold water mixing tap can be increased.
[0029]
According to the second aspect of the invention, since the sealing member for blocking hot water and water flowing into the housing is mounted on the valve body, the outer diameter of the valve body can be increased to approximately the same size as the outer diameter of the housing. Thus, the outer diameter of the valve body can be made larger than that of the first invention, and the amount of water discharged can be increased.
[0030]
According to the third aspect of the invention, the divided housings are connected via the shaft rod connected to the spindle disposed substantially near the central axis of the housing, so that the divided housings face each other and the seal material is located. There is no influence on the location of the shape, and the configurations of the first and second terms of the present invention are satisfied.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of the first invention of the present invention.
FIG. 2 is an exploded perspective view of components of the embodiment of FIG.
FIG. 3 is a longitudinal sectional view showing an embodiment of the second invention.
FIG. 4 is a cross-sectional view of a main part according to a conventional example.
FIG. 5 is a longitudinal sectional view showing a conventional example.
[Explanation of symbols]
a: water inlet b: hot water inlet c: mixed water outlet d: water chamber e: hot water chamber f: mixing chamber g: inner wall guide A: outer diameter B of the housing B: inner diameter C of the O-ring groove of the valve body C: Depth dimension D of O-ring groove of valve body D: Wall pressure dimension of O-ring mounting portion of housing E: Depth dimension of O-ring groove of housing F: Outer diameter G of valve body G: Stroke 1: Housing 1a: Hot water side Housing 1b: Water-side housing 2: Water valve seat 3: Hot water valve seat 4: Valve body 4a: Partition wall 4b: Connection port 5: Sealing material 7: Sleeve 7a: Fin-shaped portion 7b: Water opening 8: Temperature sensing Element 9: Spindle 9a: Spindle shaft 9b: Groove portion 10: Bias spring 11: Handle 12: Washer 13: Washer 14: Retaining ring 15: O-ring mounting groove 16 of the valve body 16: Sealing material 17: Body wall 18: Groove 19 : O ring 20: Groove 21: O phosphorus 22: seat 23: opening portion 30: mixer tap body

Claims (2)

A cylindrical housing portion is incorporated in the peripheral wall of the housing portion so as to be movable in the axial direction between the water inlet and the hot water inlet provided at intervals in the axial direction and between the water inlet and the hot water inlet. A substantially hollow cylindrical valve body, a water valve seat facing one end surface in the axial direction of the valve body on the water inlet side, and hot water facing the other end surface in the axial direction of the valve body on the hot water inlet side A valve seat, a mixed water outlet opened in a peripheral wall of the housing downstream of the water valve seat, and a mixed water flow path from the water valve seat to the mixed water outlet, and the valve body is placed on the hot water valve seat side A temperature sensing element for biasing and a spring for biasing the valve body toward the water valve seat side connected to a temperature setting operation portion are mounted in a cartridge shape on the main body of the hot and cold water mixing tap In the hot and cold water mixing tap, the housing is disposed between the water inlet and the hot water inlet. The valve body is divided perpendicularly to the axial direction, the divided end faces are opposed to each other at a constant interval in the axial direction, the valve body is disposed at a position sandwiched between the end faces, and the outer peripheral surface of the valve body And a sealing member for blocking the water inlet and the hot water inlet, and a connecting member for connecting the divided housings through the inner diameter portion of the valve body .   2. The hot and cold water mixing tap according to claim 1, wherein each of the divided housings is connected to the temperature setting spindle via a shaft bar that is integral with or connected to the temperature setting spindle.

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