JPS6150192B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a thermostatic water mixing faucet among sanitary appliances that can automatically adjust the temperature of hot water using a temperature-sensing function.

(Prior Art) Conventionally, a hot/cold mixer faucet of the type in which a thermosensor senses the temperature difference between hot and cold water, and a valve body is actuated in response to the sensing to control the fluid, is disclosed in Japanese Patent Laid-Open No. 57-
There is one shown in FIG. 2 of Publication No. 127171 (FIGS. 6 and 6a of the drawings of the present application).

To briefly explain the above FIG. 6 and partially enlarged FIG. 6a, the valve body 50 includes a hot water supply chamber 51 and a water supply chamber 52 on one side in the axial direction, and a mixing water chamber 53 in the center that communicates with the discharge section. A liner 54 is installed in the axial direction across this mixing water chamber 53, and a water valve seat 56 is opened at the tip of the liner 54 to communicate with the water supply chamber 52, and the other hot water valve seat 5
7 is provided inside the blind cover 59 of the screw hole 58 opened in the valve body 50 on the hot water supply chamber 51 side to narrow the distance from the water valve seat 56 and shorten the width of the control valve body 60. In addition, an eccentric through hole 62 is provided on the end surface of the temperature sensing body case 61 facing inside the water valve seat 56 to communicate with the plurality of through holes 55 of the control valve body 60. is interposed in the valve guide hole 63 of the partition wall 65 that partitions the hot water supply chamber 51 and the water supply chamber 52, and corresponds to the temperature sensing element 64.

In the case of the above, there is a diameter difference between the seal diameter D of the valve guide hole 63 and the effective diameter D ₁ of the control valve body 60 when sealed, and the width of the control valve body 60 itself is significantly large. Coupled with the fact that it is narrow, when fluid pressure is applied during water flow, this pressure acts greatly on the valve guide hole 63, causing the control valve body 60 to operate toward the side with lower pressure, which is a fatal flaw. . Also,
Since the space T between the inner diameter of the temperature sensor case 61 and the outer diameter of the temperature sensor 64 is wider than necessary, the fluid moving in this space T has a slow flow rate due to an excessive flow rate, and the temperature sensor This has many disadvantages, such as significantly slowing down the sensitivity of the water flow rate, making it time-consuming to adjust the flow rate, and increasing the loss of hot water due to adjustment.

(Problem to be solved by the invention) The problem to be solved by this invention is to improve the accuracy of water shutoff and prevent hot water leakage by stabilizing the correspondence between the control valve body and the valve guide hole. In addition, due to the correspondence between the temperature sensitive body case and the control valve body, it is possible to quickly respond to temperature changes at the time of switching.

(Means for Solving the Problem) The technical means taken by the present invention to solve the above problem is to install a hot water passage and a water passage on one side in the axial direction so that their extended ends overlap vertically. Set up differently,
Each valve body is formed with a hot water supply source, and along the hot water passage and the water passage within the valve body are provided an eccentric liner opening, along which a mixing water jacket and a hot water jacket are arranged. They were arranged concentrically in the axial direction, with the left and right being misplaced, and a thermosensor case equipped with a thermosensor and a liner containing a temperature adjustment mechanism were inserted into the liner insertion opening, and the liner was placed facing the thermosensor. The diameter of the control valve body and the effective diameter of the seal are made equal, and this control valve body is flexibly fitted into the valve guide hole of the liner, and the corresponding valve body is attached to a handle for adjusting flow rate. It is connected to the shaft so that it can be screwed freely, and a notch is provided in the end face of the temperature sensing element case by a short protrusion that abuts against the control valve element, and the end of the temperature sensing element is slightly connected to the valve opening of the control valve element. The temperature sensing element and the actuator of the temperature control mechanism connected to one end of the liner are elastically engaged, and the spring between the nut corresponding to the actuator and the valve chamber are The interposed control valve body and the spring between the valve bodies are elastically balanced, and the valve body and the handle shaft on the hot water supply side are connected to each other so that they can be screwed freely, and the valve body is actuated by the temperature sensing of the thermosensor. By operating both valve bodies, the temperature of the hot water and the flow rate of the hot water can be adjusted as appropriate.

(Example) Hereinafter, the configuration of the present invention will be explained in detail based on the drawings.

In an embodiment of the present invention, as shown in FIGS. 1A, 2B to 5A, 2B, and 5C, a valve body 1 has a laterally elongated liner socket 2 and a liner socket 2 which is eccentric in the axial direction. A mixing water jacket 3 having an inner diameter larger than 2 and communicating in the discharge direction, a hot water jacket 4 and a water jacket 4' are concentrically connected, and a hot water inlet 5 and a water inlet are provided on the walls of the hot water jacket 4 and water jacket 4'. 6 are opened, and male and female screw threads 7 and 7a having different inner diameters are provided at the outer ends of the water jacket 4' and the liner insertion opening 2, respectively. The hot water passage 8 and the water passage 9 are provided in parallel on one side of the valve body 1 in the axial direction.
The parallel parts are separated into upper and lower parts by a partition wall 10, and are arranged in different places, each communicating with the hot water inlet 5 and the water inlet 6 separately on the inside, and communicating with the water heater and water pipes on the outside, respectively. ing. The liner 11 has a cylindrical shape, and a flange portion 41 at one end is attached to the threaded portion 7 of the valve body 1 via a cylindrical nut 16, and a plug 19 is attached to the threaded portion 7b at the other end. The handle shaft 23 is rotatably supported by the handle shaft 23, and the handle shaft 23 and the valve body 17 interposed in the valve chamber 20 are connected to each other by a threaded portion 7c so as to be freely threaded, and the valve chamber 20 and the water inlet 6 A control valve body 18 is interposed between the valve seat 13 on the water side leading to the
The control valve body 18 has a spring seat 21 so as to be always in contact with the valve seat 13 side by the biasing force of a spring 22 between the spring seat 21' of the valve body 17, and the control valve body 18 As shown in FIG. 1A and B, the hot water side seal 15 and the water side seal 1 are cylindrical and have ring shapes on both end surfaces.
5', and the effective diameter D of both seals 15, 15' is made equal to the outer diameter of the control valve body 18, and this control valve body 18 is located between the hot water inlet 5 and the water inlet 6 of the liner 11. The valve guide hole 24 is slidably inserted into a valve guide hole 24 whose inner diameter is approximately equal to the outer diameter of the control valve body 18 . The liner insertion port 2 is configured to hold the liner 11 eccentrically to the valve body 1 via seal portions 28 at a plurality of locations that protrude annularly at required intervals from the inner circumferential surface of the valve body 1. It is removably attached to the threaded portion 7 of the valve body 1 with a cylindrical nut 16. The valve body 17
The control valve body 18 controls the flow rate of hot water by receiving elastic pressure from the valve body 17. Valve body 1 to adjust
7 and the valve seat 13 of the liner 11, the flow rate of hot water can be increased or decreased through the hot water inlet 5' of the liner 11, which is interposed between the water inlet 6 and the valve seat 13 of the liner 11, and communicates with the valve port 12' of the control valve body 18. The structure is such that the increase and decrease of water flowing in from 6' through the inlet 12 of the temperature sensitive body case 26 is performed in conjunction with the operation of the temperature sensitive body 30, which will be described later. Also, a handle shaft 23 that operates the valve body 17
is held by a plug 19a attached to the threaded portion 7a of the liner 11 so as to be movable forward and backward. As shown in FIGS. 2 and 4, the separately provided thermosensitive body case 26 has a plurality of short protrusions 27 and each protrusion 27 on the periphery of the fluid inlet 12 side facing the control valve body 18. The notches 27' are provided alternately so that the temperature sensed by the temperature sensing element 30 (described later) can be controlled by the flow from the notches 27' when the control valve body 18 is in the early stages of opening or just before closing the valve port 12'. The normal temperature sensing element 30 filled with a liquid or gas temperature sensing medium is integrally connected to the temperature sensing element case 26, and the tip of the temperature sensing part is lower than each of the projections 27. The control valve body 18 is elongated.
a correspondence relationship in which the control valve body 18 extends a required length into the inside of the valve port 12' when facing the control valve body 18;
A correspondence relationship in which the fluid flowing into the working chamber 29 from the inlet 12 side passes through the outlets 40, 40' as shown by arrow P3, while the flow rate is throttled by the narrow flow path between the working chamber 29 and the temperature sensing element 30. Depending on the temperature sensor 3
The temperature sensing case 26 is slidably interposed in the working chamber 29a of the liner 11 so as to improve the temperature sensing performance of the liner 11. The handle shaft 23' for temperature adjustment is attached to the threaded part 7e of the liner 11 via a packing presser 33, as shown in FIG. and a female spline portion 36, and the handle shaft 23' and the handle 38' are also connected to the nut 16 via a nut 16' having a male spline portion 35 and a female spline portion 36, A spring 22' is interposed between the plug 19b and the actuator 32, and the spring 22' causes the temperature sensing element 30 to actuate the control valve body 18 in response to the temperature of the fluid passing through the actuation chamber 29. , this control valve body 18
They are linked so that hot water and water are automatically increased and decreased by the operation of the system. The elastic force of the spring 22' is applied to the control valve body 1 while being pressed by the temperature sensitive body case 26 which moves in the direction of arrow P together with the temperature sensitive body 30.
The temperature adjustment mechanism 37 is configured to correspond to the elasticity and balance of the spring 22 supporting the temperature adjustment mechanism 8.

The temperature sensing effect can be maintained to the maximum by setting the gap between the outer peripheral surface of the temperature sensing element 30 and the working chamber 29 to 1.5 m/m to 2.5 m/m.

Also, the packing presser 33 of the handle shaft 23'
A safety device (not shown) is installed between the handle shaft 23' and the handle shaft 23'.
A push button 34 is provided.

Now, when the valve body 17 and the control valve body 18 of the temperature adjustment mechanism 37 are in the position shown in FIG. 4, the hot water flows in the direction indicated by the arrow P1 shown in FIGS.
The hot water jacket 4 shown in FIG. 4 is reached through the hot water inlet 5 that opens at the end through the hot water passage 8 as shown in FIG.
The valve enters the inside of the control valve body 18 through the gap between the valve body 17 and the control valve body 18, and communicates with each through hole 14' opening at the inner end surface of the control valve body 18. It reaches the working chamber 29 of the temperature sensitive body case 26 through the valve port 12', which is opposite to the valve port 12', and the inlet 12 of the temperature sensitive body case 26, and extends along the inner wall surface of the working chamber 29. While soaking the surface of the temperature sensing element 30 in the working chamber 29 to the extent that a narrow gap is left, move toward the outlet 40 side and move from the previous one to the outlet 40 side.
The liner 11 passing through 0 and facing this outlet 40
A faucet 39 enters the mixed water jacket 3 through an outlet 40' and communicates with the mixed water jacket 3.
Release hot water from.

During this supply of hot water, the temperature sensor 30 that senses the temperature in the working chamber 29 operates quickly due to its sensitive characteristics and the spacing relationship with the inner wall of the working chamber 29. The temperature sensitive body case 26, which is integral with the temperature sensitive body case 26, similarly moves in the same direction, and presses the control valve body 18, which is in contact with the end face of the temperature sensitive body case 26 as shown in FIG. 4, in the same direction. Accordingly, the distance between the control valve body 18 and the valve body 17 is appropriately narrowed, and the distance between the control valve body 18 and the valve port 12' on the opposite side is widened, so that the water jacket 4' flows along the path of arrow P2.
The cold water that has reached
2' and passes through the valve port 12' from the inlet 12 of the temperature sensitive body case 26 to the working chamber 29 as described above, while being appropriately mixed with the hot water from the outlet 40, 40' and The mixed water flows out through the jacket 3 to the faucet 39. At this time, when the seal 15' of the control valve body 18 is slightly separated from the valve seat 13, the cold water flowing in from the water inlet 6' is quickly activated through the notch 27' formed by the protrusion 27 at the mouth end of the temperature sensor case 26. Since the cold water enters the chamber 29, the temperature sensing element 30 quickly senses the temperature drop due to the inflow of cold water, quickly responds in the opposite direction, and automatically adjusts the distance between the control valve body 18 and the valve body 17. Turn the water to the appropriate temperature at the faucet 39.
Supplied from. The temperature sensing element 30 during this temperature adjustment is
The valve body 1 is supported by an actuator 32 which is elastically engaged through a guide 31 at its end.
7 and the control valve body 18 by the elastic balance of the springs 22, 22', which flexibly separate the valve body 18, temperature adjustment is easy. ' to rotate the handle shaft 23' in the screwing direction.
Plug 19b that engages with the male spline portion 35
moves in the direction of arrow P to compress the spring 22', and applies the pressure to the temperature sensing element 30 via the actuator 32, thereby reducing the operating range of the temperature sensing element 30 for fine adjustment.

Next, in order to reduce the use of hot water, handle 3
8 in a predetermined direction and pressurizes the control valve body 18 toward the valve seat 13 side using the valve body 17 to squeeze the hot water inlet 5' and the water inlet 6', the control valve body 18
By making the outer diameter D and the effective diameter of the seals 15, 15' equal when they are in operation, the pressure applied to the outer diameter D and the effective diameter of the seals 15, 15' is made equal, so the control valve body 18 is It does not fluctuate or fluctuate due to the pressure difference between hot and cold water. Therefore, the set temperature value can be stably maintained.

In addition, due to long-term use, valve body 17, control valve body 1
8. If there is dirt or foreign matter in the mutually corresponding surfaces of the valve chamber 20 and the valve seat 13, which obstructs fine adjustment of the water temperature, operate the handle 38 to remove the valve body 1.
If you supply water while reciprocating 7 in the forward and backward directions several times, you can easily remove dirt and foreign matter from the hot water.

Furthermore, in order to stop the hot water supply, if the handle 38 is operated in the screwing direction, the handle shaft 23 shown in FIG.
moves in the opposite direction of the arrow P and presses the valve body 17 toward the control valve body 18 side with its end face, so that the hot water is on the primary pressure side of the hot water inlet 5', and the cold water is on the primary pressure side of the water inlet 6'. The water will also be shut off separately and stand by.

(Effects) Since the present invention has the above configuration, it has the following advantages.

(1) Both hot water and cold water are stopped separately on the primary pressure side, so there is no risk of cold water exceeding the pressure flowing back into the water heater, loss of heat due to temperature drop, or turning off the pilot light of the water heater. You can prevent potential dangers from occurring.

(2) By making the outer diameter of the control valve body equal to the effective diameter when the seals provided at both ends are in operation, the pressure received by the outer diameter and the effective diameter of the seals is made equal, so that the control valve body 18 does not easily fluctuate due to the pressure difference between hot water and water, and as a result, the set temperature value can be stably maintained.

(3) Since the valve body and handle shaft are connected by a screw thread so that they can be screwed freely, there is no risk of dirt from hot water or foreign matter getting caught on the corresponding surfaces of the valve body, control valve body, valve chamber, valve seat, etc. If the water temperature becomes too hot and interferes with fine adjustment of the water temperature, you can operate the handle and reciprocate the valve body several times in the forward and backward directions while supplying water.
You can easily remove dirt and foreign substances from hot water.

(4) A plurality of short protrusions are provided on the end face of the thermosensor case facing the control valve body, and a gap between the working chamber of the thermosensor case and the thermosensor prevents fluid flow. Since the handle is made as narrow as possible, the temperature sensing element can respond sensitively to sudden changes in the handle, allowing smooth temperature adjustment.

(5) Compared to conventional products, it not only eliminates the possibility of erroneous operation of the handle, but also improves productivity due to its simple mechanism, and significantly reduces costs in distribution processes such as transportation and packaging.

[Brief explanation of the drawing]

FIG. 1A is an enlarged side sectional view of the control valve body of the present invention;
B is a left side view of A, FIG. 2 is a partially broken enlarged side perspective view of the thermosensitive body case of the present invention, and FIG.
The figure is a partially broken plan view of the valve body, Figure 4 is a front sectional view, Figure 5 A is a sectional view taken along line A-A in Figure 3, and B is B-B in Figure 4. A cross-sectional view along line C is also a cross-sectional view along C-C line, Figures 6 and 6a.
The figure is an explanatory diagram of the prior art. Explanation of symbols of main parts, 1... Valve body, 2
...Liner socket, 4...Hot water jacket, 4'...
...Water jacket, 5,5'...Hot water inlet, 6,6'...
...Water inlet, 8...Hot water passage, 9...Water passage, 11...
...Liner, 12'... Valve port, 13, 13'... Valve seat, 15, 15'... Seal, 17... Valve body, 1
8...Control valve body, 19b...Plug, 20...Valve chamber, 23, 23'...Handle shaft, 24...Valve guide hole, 26...Temperature sensor case, 27...Protrusion, 2
7'... Notch, 29... Working chamber, 30... Temperature sensing element, 31... Guide hole, 32... Actuator, 37...
Temperature control mechanism.

Claims (1)

[Claims] 1. The hot water inlet 5, the water inlet 6, the hot water jacket 4, and the water jacket 4' are provided at different positions from the hot water passage 8 and the water passage 9, and the liner insertion port 2 is made eccentric.
and a valve chamber 20 communicating with the hot water inlet 5 and the water inlet 6 at one end, and a control valve body 18 and a handle shaft 23 on the flow rate adjustment side are screwably connected to the valve chamber 20 at one end. A plug 19b having an operating element 32 resiliently corresponding to the guide element 31 of the temperature sensing element 30 is installed at the other end of the plug 19b. and a handle shaft 23' for temperature adjustment.
The liner 11 has a temperature control mechanism 37 interposed therebetween that can freely reciprocate in the axial direction to finely adjust the hot water temperature, and a liner 11 with a temperature control mechanism 37 interposed therebetween that can freely reciprocate in the axial direction. A seal 15' corresponding to the valve seat 13 on the water side is provided, and the effective diameter of both seals 15, 15' during operation and the outer diameter between the two seals 15, 15' are made equal to each other. A temperature sensing element 30 made of a desired temperature sensing medium is housed in an operating chamber 29 having a notch 27' formed by a plurality of protrusions 27 on the end surface, and the outer diameter and operation of the temperature sensing element 30 are room 29
The gap with the inner diameter of the temperature sensing element 30 is narrowed to the extent that fluid circulation is not inhibited, and the end of the temperature sensing element 30 is adapted to slightly face the valve port 12' of the control valve element 18. The control valve body 18 and the valve guide hole 2
By stably maintaining the correspondence relationship with 4, the accuracy of water stoppage is improved and the temperature sensor case 26
A thermostatic hot/cold mixer faucet characterized by a correspondence relationship between the notch 27' and the valve port 12' of the control valve body 18 to quickly respond to temperature changes at the time of switching.