JPS6155486A - Automatic temperature adjusting combination faucet - Google Patents

Abstract

PURPOSE:To prevent hot water from being delivered immediately after the delivery of water is operated, by forming a recessed part in the side end part forming a hot water valve seat of a spool opening and closing a cold and hot water inflow groove and protrucing in this recessed part an annular wall, integrally formed with a movable cock body, through an initial inflow control clearance. CONSTITUTION:This cock comprises a temperature setter part A including a slider 25 longitudinally moved in the axial direction through a spindle 16 by rotating a temperature adjusting handle, control valve part B including a spool 35 equipping a temperature sensing extending and contracting material 34 and a flow setter part C including a movable cock body 41 longitudinaly moved by operating an adjusting screw 43. The spool 35 forms in its both ends a cold water valve 31 and a hot water valve 32, and the movable cock body 41 changes the opening area of a cold water inflow groove 38 and a hot water inflow groove 39 through the spool 35 inaccordance with the action of the temperature sensing extending and contracting material 34 housed i a mixing hot and cold water path 41c. And the cock, forming a recessed part 35c in the side end part forming a hot water valve seat 41a of the spool 35, forms into movable cock body 41 an annular wall 41b so as to protrude in said part 35c through an initial inflow control clearance I.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is characterized in that when the temperature of mixed dry water deviates from the set temperature, a temperature-sensitive elastic body incorporated in the spool of the control valve detects this. to move the spool in the direction that corrects the misalignment.
This invention relates to an automatic temperature-adjusting mixing faucet configured to automatically adjust the temperature of mixed hot water to a set temperature by adjusting the opening area of the inflow channel.

[Prior Art] Conventionally, as shown in FIG. 5, an automatic temperature-adjusting mixer faucet 1 has a system in which hot water and sphagnum moss inflow channels 3 and 4 are controlled by moving a spool 6 located in a central area within a main shell 2. A control valve section B' equipped with a temperature-sensitive expandable body 5 that controls the opening area; and a temperature setting section A' that is located on one side of the control valve section B' and controls the axial position of the spool 6. and a flow rate setting part C' equipped with an on-off valve 7 located in the other side area of the control valve part and controlling the discharge flow rate of mixed drought water, are disposed in the main outer shell 2, and the main outer shell 2 Check valve portions are provided between the hot water and water supply ports 8.9 provided below and the hot water and water inflow grooves 3 and 4, respectively,
It is configured by providing F.

[Problems to be Solved by the Invention] However, in the conventional automatic temperature-controlled mixing faucet 1, the on-off valve 7 of the flow rate setting section C' is provided on the outflow side of the control valve section B', so that the following problem occurs. There were drawbacks.

- Since the closing operation of the on-off valve 7 is performed under a mixed state of hot water and water, a check valve E is indispensable. Providing the check valve E and the on-off valve 7 in this way increases the size of the faucet main body 1 and increases the cost.

◎ When the on-off valve 7 is throttled, a so-called hunting phenomenon occurs due to an increase in static pressure around the temperature-sensitive elastic body 5. This phenomenon causes the temperature of the mixed hot water to pulsate up and down, causing great discomfort during use.

[Means for Solving the Problems] In order to solve the above-mentioned drawbacks, the present invention provides an automatic temperature-adjusting mixing faucet that does not require any check valves or independent on-off valves and is free from the hunting phenomenon. purpose.

The gist of the present invention is to provide a spool that is slidably inserted into a spool case in the axial direction and has a water passage hole, and a spool that is slidable in the axial direction to form one water inlet passage and the other water inflow passage. The automatic temperature-adjusting mixing faucet is provided with a temperature-sensitive elastic member that controls the opening area of each of the inflow passages, and a temperature setting section that is located on one side of the spool and controls the opening position of the spool. The water inflow path includes a water valve formed at one end of the spool and a fixed water valve formed in the spool case, and the hot water inflow path includes a hot water valve formed at the other end of the front Rd spool. The movable stopper forming the hot water valve is provided with a hot water water passage for accommodating the temperature sensing portion of the thermosensitive elastic body. The hot water valve seat of the spool is configured to be movable from a water stop position where the spool is pressed toward the other side to close each of the hot water and water inflow passages to a water discharge position where the opening movement of the slide of the spool is not controlled. Four parts are formed on the forming side end, and the movable stopper has an annular wall projecting into the interior of the recess to control the initial inflow between the outer peripheral surface of the annular wall and the inner peripheral surface of the recess. They are formed with gaps between them.

[Example] Figure 1 shows an automatic temperature-controlled mixing faucet (hereinafter referred to as
FIG. 2 is a front partial sectional view showing an embodiment of a mixing faucet according to the present invention. The outer shell 12 of the mixing faucet 11 is formed into a horizontally long cylindrical part, and has a plurality of chambers inside.

The chambers are supply drought chambers e and d, and an outflow mixing spring chamber f,
It consists of installation chambers a and C for a temperature setting section and a flow rate setting section C. Each of the supply hot water chambers e, d is formed with a downwardly bulging portion d/, et, and each supply pipe 14.13 of the dry water
is connected. Further, the outflow mixing hot water chamber f communicates with a water discharge pipe section 12a protruding from the -L section of the cylindrical outer shell 12.

The temperature control handle 15 constituting the temperature setting section A has a ring 17 having serration grooves on its inner and outer peripheral surfaces inserted into the center thereof, and is inserted into the serration groove formed on the left end side of the temperature control spindle 16. They are fitted and fastened with bolts 18. As shown in the second diagram, the temperature control spindle 16 is rotatably supported at its axial center by a hollow spindle case 19, and the spindle case 1
This is to restrict the axial position relative to 9. Further, on the right side of the spindle case 19, as shown in FIG.
It is fitted into the inner installation chamber a, and the flange 19a is fixed by abutting against the inner flange 12b at the left end of the installation chamber a. Therefore, the axial positions of the spindle case 19, the temperature control spindle 16, and the temperature control handle 15 are regulated by the outer shell 12.
The r-claw will be attached. Inside the hollow part of the spindle case 19, as shown in FIG. 2 (8), a slider 24 is provided.
is attached so that it can be moved left and right by serration fitting. The slider 24 has a female screw 2 formed on its left end side.
A male screw 16b of the temperature control spindle 16 is screwed into the shaft 4a. Further, the slider 24 has a relief spring 26 and a disk 27 biased toward the right side by the relief spring 26 built in the hollow portion, and the stopper ring 2
9 prevents the disc 27 from popping out. The relief spring 26 is for absorbing the protrusion of the protrusion 34 of the temperature-sensitive elastic body 34 during the first water cycle (see FIG. 2 (Bl)), which will be described later.

In the concentration setting section A having the above configuration, as shown in FIG. 1, by rotating the tit handle 15, the temperature control spindle 16 rotates integrally, and the slider 24 (see the second diagram) is moved in the axial direction. However, in order to prevent the axial movement of the slider 24 from causing the temperature of the mixed hot water to exceed a dangerous temperature, a stopper mechanism 28 of an appropriate type is provided.

As shown in FIG. 2 (8), the control valve part BjJ consists of a spool case 36 and a spool 35 equipped with a temperature-sensitive elastic body 34 (with wax sealed inside as a temperature-sensing means). The spool 35 is fitted into the case 36 so as to be slidable left and right, and is always urged leftward by a spring 37, which will be described later. The spool case 36 is screwed and fastened 30 to the right end of the spindle case 19 of the temperature setting section A on the left end side, and is connected to the supply drying chambers e and d (see FIG. 1) and the outflow mixing hot water chamber f (see FIG. 1) of the outer shell 12. (See Figure 1). The spool case 36 has a large circumferential water flow groove (slit shape) 38 bored in a part of the outer peripheral surface located in the supply water chamber d (see Fig. 1), and further has a water flow groove (slit shape) 38 in the supply water chamber e.
A hot water inflow groove (slit shape) 39 in the circumferential direction is bored in a part of the outer circumferential surface located at (see FIG. 1). A screen filter 33 is fitted onto the large water flow groove 38 and the hot water inflow groove 39, respectively. Furthermore, the spool case 36
A discharge port 40 in the circumferential direction is bored near the right end. The spool 35 has a water valve 31 and a hot water valve 32 formed at its front and rear ends, and the water valve 31 and an annular water valve seat 36a formed in the spool case 36 form a water inflow passage G. An m inflow path H is formed by the valve 32 and a hot water valve seat 41a formed integrally with or separately from a movable stopper 41, which will be described later. The spool 35 has water holes 35a, 35a...
The temperature-sensitive elastic body 34 is screwed onto the boss portion 35b which is bored. The temperature-sensitive elastic body 34 has a large-diameter temperature-sensing portion (wax-enclosed portion) 34a connected to a mixing water channel 41 of a movable stopper 41, which will be described later.
(i), and the tip of the protrusion 34b is brought into contact with the disk 27.The protrusion 34b protrudes and enters in response to the temperature-sensing expansion and contraction of the enclosed wax. and the selectable amount is strictly and linearly proportional to the change in the mixing water.

The biasing force of a return spring 37 inserted into a hollow portion of a movable stopper 41, which will be described later, is set to be smaller than the biasing force of a relief spring 26 that biases a disc within the slider 24. Therefore, the disc 21 is held in place by being pressed against the stopper ring 29 during normal operation.

In the control valve section B, the protrusion 3 of the temperature-sensitive expandable body 34
The position of the spool 35 is determined by the stroke of 4b, and the opening area ratio of the hot water inflow paths G and H is determined.

The flow rate setting section C has the right end of the movable stopper 41 receiving the repulsive elastic force of the return spring slidably inserted into the spool case 36 of the temperature setting section B, and the right end of the movable stopper 41 receiving the repulsive elastic force of the return spring. An adjustment screw 43 is screwed into the center of the rear end of the plug case 42 into which the adjustment screw 43 is fitted.
The movable plug body 41 is configured to move forward and backward as the movable stopper 41 moves forward and backward. The plug case 42 is inserted into the installation chamber C of the outer shell 12, and is screwed into the outer shell 12 at a threaded portion 42a near the center. Near the left end of the opening of the movable stopper 41, an annular wall tlb is provided protruding from the inner side of the hot water valve seat 41a, and the outer peripheral surface of the annular wall 41b and the recess 35c of the spool 35 are connected.
An initial inflow control gap (2) is formed between the inner circumferential surface of the inlet and the inner peripheral surface of the inlet. The protruding dimension l (see FIG. 2B) of the annular wall 41b is generally set to 3 to 711, and the dimension n of the initial inflow control gap 2 is set to 0.5 to 1.5 11 m.

Furthermore, water flow slits 41d are formed in the annular wall 41b at appropriate layer pitches as necessary. The movable stopper 41 is
The hollow interior serves as a mixed hot water channel 41c, and
A discharge port 41e is opened near the rear end of the hot water mixing area 41c. Further, a stopper 45 for regulating the amount of movement of the movable stopper 41 is attached as necessary. The adjustment screw 43 is connected to the serration shaft 4 as shown in FIG.
Flow to 3a! Setting handle 46 is engaged and fastened with bolt 47. The movable stopper 41 changes the distance between the water valve dust 36a and the hot water valve dust 41a as the adjustment screw 43 moves forward and backward as the flow rate setting handle 46 is rotated, thereby adjusting the amount of mixed water.

In the flow rate setting section C having the above configuration, as the flow rate setting handle 46 is rotated in the water cutoff direction, the movable stopper 41 shown in FIG. When 11t L is set to the minimum value, the hot water valve 32 of the spool 35
At the same time, the water valve 31 and the water valve dust 36 come into close contact with each other.
a is in close contact with the water, completely stopping water.

Next, when the flow rate setting handle 46 is rotated from the water stop position in the water discharging direction, the movable stopper 41 is automatically moved to the right by the repulsive force of the return spring 37.
The spool 35 becomes movable, and an amount of mixed hot water corresponding to the amount of movement of the movable stopper 41 is guided into the mixed hot water channel 41c inside the movable stopper 41.

[Function] When the flow rate setting handle 46 (see Fig. 1) is in the water stop position, the movable stopper 41 is at its limit position to the left as shown in Fig. 2B), so the hot water in the spool 35 is valve 32
At the same time, the water valve 31 and the water valve dust 36 come into close contact with each other.
a is in close contact with the water, completely stopping water.

When the water stop state is maintained and the inside of the mixed hot water channel 41c of the movable stopper 41 is in a cold state, the tip of the protrusion 34b of the temperature-sensitive elastic body 34 retreats (at the position indicated by the two-dot chain line in the figure). )
As a result, the spool 35 is brought into a non-contact state with the disk 27, and the spool 35 is biased to the left only by the repulsion elastic force of the return spring 37. Next, when the flow setting handle 46 (see FIG. 1) is rotated in the water discharging direction, the adjustment screw 43 moves back to the right and the movable stopper 41 also moves toward the return spring 37.
The hot water valve dust 41a moves away from the hot water valve 32 of the spool 35, and the hot water inflow path H opens. With the opening of the hot water inflow path H, hot water passes through the initial inflow control gap (2) and flows into the mixed hot water channel 41a of the movable plug body 41. By the way, immediately after the movable plug body 41 retreats, the initial inflow control gap I suppresses the initial amount of hot water. The amount of hot water (usually 0.5 seconds or less) is the minimum required. When the temperature-sensitive elastic body 34 starts controlling due to the inflow of water, the spool 35 is moved to a predetermined sliding position so that the opening area ratio between the hot water inflow path H and the water inflow path G corresponding to the desired mixing temperature is obtained. Moving. As the spool 35 moves, the water flowing from the water inflow path G flows through the water passage hole 35 of the spool 35.
After passing through 35a, 35a, . . . , the hot water mixes with the hot water flowing in from the hot water inflow path H, reaches a desired temperature, and is guided into the mixed hot water channel 41c of the movable stopper 41. The mixed hot water at the desired temperature is supplied to the outlet 41e of the movable stopper 41 and the spool case 36.
The discharge pipe section 12a shown in FIG.
The water is guided to the water spout 12a/ and spouted from the water spout 12a/.

In order to confirm the effect of the initial inflow control gap (2), the inventors tested the mixing faucet of the present invention with the initial inflow control gap (1) and the mixing faucet without the initial inflow control gap (I) under the following conditions. A repeated test of water discharge and water stop was conducted under the following conditions, and the following results were obtained.

〔Test conditions〕

(1) Dimensions of inflow control gap I (see Figure 2 (B)) 1
=511. n −1−zono, l)=25amφ(
2) Water pressure = 4kg/cI#, 8 degrees - 20 degrees Celsius (3) Water pressure = 0.5 kq/cd, temperature = 80 degrees Celsius (4) Set temperature 40 degrees Celsius (5) Mixed tide water temperature measurement location Figure 2 Position of the outlet 40 in the figure [Test results] Figure 3 is a graph showing the measurement results of the mixed hot water temperature in the mixing faucet of the present invention, and Figure 4 is the mixed hot water in the mixing faucet without an initial inflow control gap. A graph showing concentration measurement results. Note that in both graphs, the vertical axis represents temperature, and the horizontal axis represents time. Furthermore, in both graphs, each peak value indicates the state immediately after the start of water spouting.

As is clear from both graphs, in the case of a mixer faucet that does not have an initial inflow control gap (Figure 4), the mixed water that is 7 to 8 degrees Celsius higher than the set temperature immediately after water starts spewing out can cause burns. On the other hand, with the mixing faucet of the present invention, only a mixture of hot water and water whose humidity is only about 2° C. higher than the set humidity is spouted immediately after water is spouted, which does not cause burns.

[Effects] ■ The mixing faucet of the present invention employs a water stop mechanism that separately shuts off water in the water inflow path and the hot water inflow path, so it does not require a check valve or an independent water inlet, which are essential in conventional mixing faucets. This eliminates the need for an on-off valve, making it possible to downsize the faucet body and reduce costs.

(2) In the mixing faucet of the present invention, since the temperature-sensitive elastic member is located on the outflow side of the water stop mechanism, the static pressure around the temperature-sensitive elastic member does not fluctuate rapidly even when the pressure of the supplied hot water changes. As a result, the mixing faucet of the present invention completely eliminates the so-called hunting phenomenon that occurs in conventional mixing faucets, and can provide mixed hot water and water at a stable temperature.

(2) Since the mixing faucet of the present invention is provided with an initial inflow control gap, it is possible to obtain mixed hot and cold water at a stable temperature without causing high-temperature drought water to be spouted immediately after the start of water spouting operation.

[Brief explanation of drawings]

1 to 3 show an embodiment of the automatic temperature-adjusting mixer faucet according to the present invention. FIG. 1 is a partial front cross-sectional view showing the whole, and FIG. A vertical cross-sectional view showing a cartridge inserted into the outer shell of the main body, Fig. 3 is a graph showing the temperature of mixed hot water when water is repeatedly discharged and stopped, and Fig. 4 shows mixed water without an initial inflow control gap. A graph showing the temperature of mixed hot water when water is repeatedly discharged and stopped at a faucet,
FIG. 5 is a front sectional view of a conventional automatic temperature-adjusting mixer faucet. 31...Water valve 32...Hot water valve 34...Temperature sensitive elastic body 35...Spool 35c...Concave portion 3
6...Spool case 36a...Water valve dust 4
1... Movable plug body 41a... Hot water valve dust 41b.
・Annular wall 41d...Water slit ・A...
・Temperature setting i! IG...Water inflow path H...Hot water inflow path I...Initial inflow lll11 gap Patent applicant
Ina Seito Co., Ltd. Aisan Kogyo Co., Ltd.

Claims (1)

[Claims] 1. A spool that is slidably inserted into a spool case in the axial direction and has a water passage hole, and the spool is slid in the axial direction to form one water inlet channel and the other water inflow channel. An automatic temperature-adjusting mixing faucet equipped with a temperature-sensitive elastic member that controls the opening area of each of the hot water inflow passages, and a temperature setting section that is located on one side of the spool and controls the sliding position of the spool. In the above, the water inflow path includes a water valve portion formed at one end of the spool and a fixed water valve seat formed on the spool case, and the hot water inflow path includes a water valve portion formed at the other end of the spool. The movable stopper is composed of a valve part and a hot water valve seat provided movably in the axial direction, and the movable stopper forming the hot water valve seat is formed with a mixed hot water channel for accommodating the temperature sensing part of the temperature sensitive expandable body. The hot water valve seat of the spool is configured to be movable from a water stop position where the spool is pressed toward the other side to close each of the hot water and water inflow passages to a water discharge position where sliding of the spool is not inhibited. A recess is formed in the side end, and the movable plug has an annular wall projecting into the recess to create an initial inflow control gap between the outer peripheral surface of the annular wall and the inner peripheral surface of the recess. An automatic temperature-controlled mixing faucet characterized by being formed by placing 2. The automatic temperature-controlled mixing faucet according to claim 1, wherein a flowing water slit is formed in the annular wall.