JPS6124773Y2 - - Google Patents

Description

[Detailed description of the invention] This invention works in such a way that when the temperature of mixed hot water deviates from the set temperature, a temperature-sensitive elastic body built into the spool of the control valve senses this and corrects the deviation. This invention relates to an automatic temperature-adjusting mixing faucet in which the temperature of mixed hot water and water is automatically adjusted to a set temperature by moving a spool and adjusting the opening areas of hot water and cold water inflow grooves.

Therefore, the present invention fixes the temperature-sensitive elastic body within the spool, and also creates an annular flow path for supplying hot water and water in a straight line along the axial direction between the temperature-sensitive elastic body and the inner peripheral surface of the spool. The spool is moved by the temperature-sensing action of the thermo-sensitive expandable body to control the opening areas of the supply hot water and water inflow grooves provided in an annular shape on a part of the circumference of the spool case, and the mixed hot water is kept at a certain set temperature. a control valve portion configured to adjust the temperature of the spool is provided at the center of the main outer shell portion of the faucet body; a temperature setting portion for controlling the axial position of the spool is provided at one end side of the main outer shell portion; By providing a flow rate setting section with a valve section for controlling the discharge flow rate of mixed hot water and water on the other end side, and arranging these control valve section, temperature setting section, and flow rate setting section on one axis, the mixing faucet can be easily adjusted. The aim is to achieve compactness and cost reduction, to bring the flow coefficient as close to the ideal value as possible, and to obtain a simple shape.

The configuration of the present invention will be described below based on the embodiments shown in the drawings.

FIG. 1 is a longitudinal cross-sectional view of the main parts of the automatic temperature-adjusting mixer faucet of the present invention. The main body 2 of the mixing faucet 1 has a main outer shell shaped like a horizontally long cylinder, and has a plurality of chambers inside. The chambers include chambers a and b for supply hot water, a mixing chamber d for hot water, and chambers e, f, and g for installing temperature setting section A, flow rate setting section C, and switching valve section F, which will be described later. . Each chamber a and b of the hot water supply has a horizontally long cylindrical outer shell part that bulges downward, and chambers a' and b' within this bulged part and hot water extending from the bulged part. Check valve parts D and E are installed between each supply pipe 3 and 4. Further, as shown in FIG. 2, the installation chamber f of the flow rate setting section C is continuous with the installation chamber g of the switching valve section F for switching the mixed hot water to the shower and the bath.

In the mixing faucet main body 2 having such a configuration, the present invention arranges the temperature setting part A, the control valve part B, and the flow rate setting part C on one axis in the main outer shell part of the horizontally long cylindrical shape. It is something.

The temperature setting section A includes inner and outer bottomed cylindrical members 5a, 5.
A ring 7 having serration grooves on the inner and outer circumferential surfaces is placed in the center of the temperature control handle 5 consisting of b.
The left end side of the temperature control spindle 6 (left side in Fig. 1,
(Same below) The serration grooves on the outer circumferential surface engage,
It is fastened with a bolt 8. The temperature control spindle 6 is rotatably supported at its axial center by a hollow spindle case 9, and its axial position relative to the spindle case 9 is controlled by a collar 10 and a split ring 11 of the spindle 6. regulated. The spindle case 9 is fitted onto the left-end inner circumferential surface of the oblong cylindrical portion of the faucet body 2 via an annular body 12 that fits onto the outer circumferential surface of the case, and is secured to the faucet body by bolts 13. It is fixed at 2. Therefore, the spindle case 9, the temperature control spindle 6, and the temperature control spindle 5 are attached to the faucet body 2 with their axial positions restricted. A slide shaft 14 is mounted in the hollow portion of the spindle case 9 by serration fitting. A recess 15 having a threaded groove on the inner peripheral surface is provided on the left end side of the slide shaft 14.
The screw groove is screwed onto the outer peripheral surface of the temperature control spindle 6. Further, on the right end side of the slide shaft 14, a recess 18 is provided which houses a spring 16 and a disc 17 biased by the spring 16.
A stopper ring 19 prevents the disk 17 from jumping out.

In the temperature setting section A having the above configuration, by rotating the temperature control handle 5, the temperature control spindle 6 rotates together with the temperature control spindle 6, and the slide shaft 14 can be moved in the axial direction. The axial movement of 14 needs to be regulated once at a certain position in order to prevent the temperature of the mixed hot water from rising above the dangerous temperature, and in this embodiment, a stopper mechanism is provided on the temperature control handle 5 to achieve this. ing. That is, a through hole 20 that communicates with the inside and outside is provided in a part of the side circumferential surface of the temperature control handle 5, and the safety button 21 is urged by a plate-like spring member 22 to protrude outward from the hole 20. The substrate 21a is brought into pressure contact with the inner peripheral surface of the temperature control handle 5. A locking pawl 23 corresponding to the base plate 21a of the safety button 21 is formed to protrude at a predetermined location on the left end surface of the annular body 12, so that when the temperature control handle 5 is rotated, the locking claw 23 can be positioned at a certain rotational position. A base plate 21a of the safety button 21 engages with a locking pawl 23 to stop rotation.

The control valve section B is composed of a spool 25 having a temperature-sensitive expandable body (wax is enclosed as a temperature-sensitive means) 24, and a spool case 26. Between the inner peripheral surface of the spool 25 and the outer peripheral surface of the temperature-sensitive expandable body 24, a linear flow passage is formed in an annular shape along the axial direction. The spool 25 is connected to the case 26.
1 by a spring 27. The spool case 26 is located across the hot water supply chambers a and b and the mixing chamber d of the faucet body 2, and is screwed and fastened at its left end to the spindle case 9 of the temperature setting section A. A circumferential water inlet groove (slit) 28 is formed in a portion of the outer circumferential surface of the spool case 26 located in the water supply chamber a, and a circumferential hot water inlet groove (slit) 29 is formed in a portion of the outer circumferential surface of the spool case 26 located in the hot water supply chamber b. Reference numeral 30 denotes the discharge port of the spool case 26.

On the other hand, the spool 25 has a small diameter land 25a and a large diameter land 25b, and an annular port 31 corresponding to the hot water inlet groove 29 of the spool case 26 is bored in the land 25a. The temperature-sensitive elastic body 24 is supported at the center line of the spool 25 by radial supports 32, and is connected to the port 3.
A large diameter temperature sensing part (wax enclosing part) 33 is arranged at a position corresponding to 1. 34 is a temperature-sensitive elastic body 24
It is a prominence of The tip of this protrusion 34 is attached to the disk 1 which is fixed in the slide shaft 14 of the temperature setting section A.
7 is screwed together. The protrusion 34 protrudes and retracts in accordance with the expansion and contraction of the wax due to the sensitive temperature, and the amount of protrusion and retraction is uniquely and linearly proportional to the amount of change in the sensitive temperature. 35 is the water inlet groove 28
This is an annular variable port formed by the left end surface of the spool 25 and the right end surface of the spindle case 9 at a position corresponding to . The force of the spring 27 that urges the spool 25 is the same as that of the slide shaft 14.
The biasing force is set smaller than the biasing force of the spring 16 that biases the inner disc. For this reason, the disc 17 is always held in pressure contact with the stopper ring 19, and the position of the spool 25 is determined by the stroke of the protrusion 34 at that time.
The opening area of 9 is determined.

The flow rate setting section C includes a flow rate setting valve 36 that is fitted into the valve case 41. This valve 36 is located penetrating the partition wall between the hot water mixing chamber d and the chamber f, and has a valve seat 37 and a valve body 38 of the same shape made of a ceramic disk shown in FIGS. 3 to 5. It is constructed by stacking them symmetrically.
The valve seat 37 and the valve body 38 have a fan-shaped through hole 39 and a concave groove 40, and are always urged rightward by a plate spring member 42 that engages with the concave groove 40 of the valve seat 37. Both ends of the plate-shaped spring member 42 are fitted into and supported by the window 41b of the valve case 41, so that the valve seat 37 is not rotatable and the valve body 38 is rotatable. The valve case 41 is screwed to the right end of the faucet body 2. 4
3 is a handle shaft fitted into a concave groove 40 of the valve body 38, and includes inner and outer bottomed cylindrical members 44a and 44b.
The flow rate setting handle 44 is engaged with a serration ring 45 (serration grooves are carved on the inner and outer peripheral surfaces) 45, and is fastened thereto with a bolt 46. The handle shaft 43 is designed such that a protrusion (not shown) provided on a part of the shaft 43 engages with a locking plate 41a of the valve case 41, thereby restricting its rotational position. There is. 47 is f
In the chamber, a slit-shaped discharge groove bored in the side circumferential surface of the valve case 41 connects the valve seat 37 and the valve body 3.
It communicates with the through hole 39 of No.8.

The hot water mixing faucet 1 of the present invention has the temperature setting part A, the control valve part B, and the flow rate setting part C of each of the above components arranged on one axis within the main outer shell part of the faucet body 2, as described above. This makes it possible to provide a mixing faucet that is compact in its entirety, has a simple shape, and has an excellent flow rate. This will be discussed later.

Next, the configurations of the check valve sections D and E and the switching valve section F will be explained. First, regarding the check valve sections D and E, since they both have the same configuration, only the configuration of the check valve section D will be explained here. Check valve part D
The case 49 is located between the water supply pipe 3 and the chamber a' and is screwed onto the faucet main body 2, and has a mesh (strainer) member 48 on the outer peripheral surface facing the supply water flow path. , and a spool 51, a portion of which is fitted into the case 49 and urged in the upstream direction via a spring 50 within the case. A portion of the spool 51 protrudes from the discharge port 52 into the a' chamber, and the protruding portion has a larger diameter than the diameter of the discharge port 52. Therefore, this check valve portion D operates to allow inflow only from the upstream side (water supply pipe 3) and prevent backflow from the downstream side.

The switching valve part F is in the g chamber communicating with the f chamber,
A case 53 that is screwed onto the faucet body 2, a valve shaft 54 that passes through the case 53 and is slidably attached to the case 53, and a valve shaft 54 that is attached to one end of the valve shaft 54 (on the left side in FIG. 2). A valve body 56 attached to the handle 55 and the other end side of the valve shaft 54, and a concave hole 5 of the case 53.
7 and a spring 58 that biases the valve body 56 in the right direction in the figure. A port 60 communicating with the recessed hole 57 is opened in the side peripheral surface of the case 53 facing the flow path 59 communicating with the bus. Further, the diameter of the valve body 56 is set larger than the diameter of the recessed hole 57 and the diameter of the flow path 61 to the shower.

In the mixing faucet 1 of the present invention configured as described above, water flows from the supply pipe 3 through the check valve part D to the a′ chamber and the a chamber, and the water flows through the water inflow groove 28 of the spool case 26 and Spool 25 through variable port 35
(the flow path formed by the gap between the inner circumferential surface of the spool and the outer circumferential surface of the temperature-sensitive expandable body). Hot water flows from the supply pipe 4 through the check valve portion E into chambers b' and b, and flows into the spool 25 through the hot water inlet groove 29 of the spool case 26 and the port 31 of the spool 25. For this reason, hot water is mixed in the spool 25, and the mixed hot water passes through the flow rate setting valve 36.
It flows into the chamber and the g chamber. Then, the switching valve part F is the second
In the state shown in the figure, the water is supplied to the bus from the port 60 through the channel 59. If you want to supply to the shower side, move the handle 55 to the left side in the figure,
Once the valve body 56 is brought into contact with the end face of the concave hole of the case 53, this state will be maintained by the mixed hot water pressure, and the mixed hot water will flow from the flow path 61 to the shower.

The flow rate of the mixed hot water at that time is determined by the opening area of the flow rate setting valve 36. That is, by setting the flow rate setting handle 44 to a certain rotation position, the ceramic disc valve body 38 rotates with respect to the valve seat 37 via the handle shaft 43, and the relative position with the valve seat 37 changes. The opening area of both through holes 39 is determined by the change, and the flow rate of the mixed hot water passing therethrough is determined.

On the other hand, the temperature of the mixed hot and cold water is determined by the opening area of the water inlet groove 28 and the hot water inlet groove 29, i.e., the amount of water and the amount of hot water flowing into the spool 25. The opening area of each of the above grooves can be freely set by rotating the temperature control handle 5. To explain in more detail, by setting the temperature control handle 5 to a certain rotational position, the temperature control spindle 6 rotates in the same way,
The force is transmitted to the slide shaft 14.
In the case of the temperature control spindle 6, the rotation is restricted by the serration engagement with the spindle case 9, so the rotation of the temperature control spindle 6 is converted into the axial movement of the slide shaft 14. When the slide shaft 14 moves to the left, the spool 25 also moves to the left,
By reducing the opening area of the variable port 35, the amount of water passing through it is reduced, and by increasing the opening area of the annular port 31, the amount of hot water passing through it is increased, thereby raising the temperature of the mixed hot water. When the slide shaft 14 moves to the right, the above operation is reversed to lower the temperature of the mixed hot water. Since the stroke of the protruding part 34 of the spool 25 at a certain temperature is known, the position of the spool 25 is determined in anticipation of this stroke, i.e., the ratio of the opening areas of the variable port 35 and the annular port 31 is determined, and the temperature control handle 5 and the temperature control spindle 6 are adjusted so that the temperature of the mixed hot water at that time matches the scale displayed on the temperature control handle 5.
By adjusting the connection state of the slide shaft 14 and assembling them, the temperature of the mixed hot and cold water can be set simply by aligning the temperature control handle 5 with the indication scale.

In this way, the temperature of the mixed hot water is set in the mixing faucet 1 of the present invention, but if there is a fluctuation in the supply water pressure or the supply hot water pressure, the amount of hot water flowing into the same opening area of the ports 35 and 31 will change. The temperature of the mixed hot water may deviate from the set temperature.
Therefore, in the present invention, this amount of deviation (temperature error of mixed hot water) is corrected as follows. In other words, if the temperature of the mixed hot water deviates in the direction of decreasing, the protrusion 3 will change in proportion to this temperature decrease.
Since the stroke of 4 is shorter, the spool 25
moves to the left side, decreases the opening area of the variable port 35 to reduce the amount of water flowing in, and increases the opening area of the annular port 31 to increase the amount of hot water flowing in, so that the opening area of the annular port 31 is increased to increase the amount of hot water flowing in. The temperature of the mixed hot water is increased by that amount. Furthermore, if the temperature of the mixed hot water deviates in the direction of rising, the stroke of the protrusion 34 becomes longer, so the spool 2
5 is moved to the right against the biasing force of the spring 27, and the temperature of the mixed water is lowered by an amount corresponding to the amount of deviation in the opposite manner to that described above.

In addition, when the temperature control handle 5 is at a position where the temperature of the mixed hot water reaches a dangerous temperature, the base plate 21a of the safety button 21 comes into contact with the locking pawl 23 of the annular body 12, as described above, and its rotation is temporarily restricted. However, if necessary, the safety button 21 may be attached to the plate spring member 22.
It is also possible to push it down against the force, release the engagement, and rotate it further.

As explained above, in the mixing faucet 1 of the present invention, the temperature setting part A, the control valve part B, and the flow rate setting part C are arranged on one axis, and the hot water and water in the control valve part B are Since the flow path of the mixed hot water is formed in an annular and straight line along the axial direction, there are few intervening members that become obstacles in the flow path of the mixed hot water, and the flow coefficient can be brought close to the ideal value. It is possible to obtain an excellent fluidity of mixed hot water and increase the flow rate. In addition, the control valve section B
Even if the supply pressure of hot water or water changes, it is possible to adjust the hot water to the set temperature without requiring a separate pressure balancing device or the like. In addition, since each part A to F is configured to be attached to the faucet main body 2 as a single unit,
It is easy to manufacture and convenient for maintenance and inspection. Furthermore, the temperature control handle 5 and the flow rate setting handle 44 do not stand upright in tandem shape as in the conventional case, and there is an advantage that the appearance is good.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional view of the main parts showing the entire mixer faucet.
Fig. 2 is a vertical sectional side view of the main part showing the switching valve section, Fig. 3 is a front view showing the valve seat and valve body of the flow rate setting valve, and Fig. 4 is a front view showing the valve seat and valve body of the flow rate setting valve.
The figure is a sectional view taken along the line X-X in FIG. 3, and FIG. 5 is a sectional view taken along the line Y-Y in FIG. 3. 28...Water inflow groove, 29...Hot water inflow groove, 24...
... Temperature-sensitive elastic body, 25 ... Spool, 2 ... Faucet body, A ... Temperature setting part, B ... Control valve part, C ...
Flow rate setting section.

Claims (1)

[Scope of utility model registration request] The temperature-sensitive elastic body is fixed within the spool, and supply hot water is provided between the temperature-sensitive elastic body and the inner peripheral surface of the spool.
An annular flow path of water is formed in a straight line along the axial direction,
The spool is moved by the temperature-sensing action of the thermo-sensitive expandable body to control the opening areas of the supply hot water and water inflow grooves provided in an annular shape on a part of the circumference of the spool case, and adjust the mixed hot water to a certain set temperature. A control valve portion configured as described above is provided in the center of the main outer shell portion of the faucet body, a temperature setting portion for controlling the axial position of the spool is provided on one end side of the main outer shell portion, and a temperature setting portion for controlling the axial position of the spool is provided on the other end side. The automatic temperature control type mixing device is characterized in that a flow rate setting section including a valve section for controlling the discharge flow rate of mixed hot water and hot water is provided, and these control valve section, temperature setting section, and flow rate setting section are arranged on one axis. Water faucet.