JPH08233153A - Thermo valve cartridge - Google Patents

Abstract

PURPOSE: To prevent the inflow of hot water from a hot water passage by the pressure of water flowing in a guide section from being checked by projecting a ring shaped guide section which is faced at an interval to the inside of a valve main body while being faced to a hot water passage, out of an opening peripheral section of a valve seat collar. CONSTITUTION: Hot water flowing in the inside from the hot water passage 14 of a combination faucet is guided to the valve main body 61 of a valve with a thermostat provided for a thermovalve cartridge along a guide section 4a while being not affected by water pressure, and is mixed with water. When the temperature of mixed water is raised, for example, up to a temperature higher than a set temperature, the temperature is sensed by a thermo element 63, thermo-wax is thereby expanded, a piston 62 is pushed out, and the valve main body 61 is thereby moved to the left in the figure. As a result, the hot water passage 41 between the valve main body 61 and a valve seat collar 4, is narrowed, and on the other hand, since a water supply passage 81 interspaced from a valve seat 8 is widened, mixed water is lowered in temperature, and the temperature of mixed water is thereby automatically adjusted to the specified temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a thermovalve cartridge which is replaceably inserted in a hot and cold water mixing tap or the like.

[0002]

2. Description of the Related Art A thermo valve cartridge 3 as shown in FIG. 5, for example, is incorporated in a main body case of a hot and cold water mixing valve to automatically adjust the hot water supply temperature.

The thermovalve cartridge 3 includes a thermostatted valve 6, a valve seat collar 4 forming a hot water supply passage 41 between the thermostatted valve 6 and one end of a valve body 61, and the other end of the valve body 61. The valve seat 8 forming the water supply passage 81 is integrated and is replaceably inserted into the main body case 2.

A screw groove 32 for screwing the valve seat collar 4 is formed on one end of the housing 31 of the thermo valve cartridge 3 while the valve seat seat is formed on the other end. Screw groove 33 for screwing 8
Is engraved and formed, and an O-ring 7 which is in sliding contact with the sliding contact surface of the valve body 61 is fitted to the inner peripheral surface of the intermediate portion thereof, and the O-ring 7 corresponds to the hot water supply passage 41 on both sides. The opening 34 and the opening 35 corresponding to the water supply passage 81 are provided.

Then, the valve seat collar 4 and the valve body 6
The spring 5 for urging the valve body 61 to the other end side is interposed between the valve body 61 and the valve body 1, and the shaft portion of the valve body 61 is made watertight in the opening formed in the valve seat 8. The piston 62 attached to the thermoelement 63 of the thermostatted valve 6 is loosely fitted and protrudes to the other end side, and the piston 62 is attached to a stopper rod 19 connected to a temperature control handle (not shown) by a spring. It is connected through 17. In FIG. 5, reference numeral 11 is a hot and cold water mixing chamber, 12 is a shower channel, 13 is a faucet channel, and 14 is a switching plug.

In such a hot and cold water mixing tap, when the temperature of the mixed water rises above the set temperature, the thermoelement 63 senses the temperature, the thermowax expands and pushes out the piston 62, and the valve body 61 moves leftward in the drawing. The hot water supply passage 41 between the valve seat collar 4 and the valve seat collar 4 is narrowed to widen the water supply passage 81 between the valve seat seat 8 and the mixed water temperature to lower the temperature.

When the temperature of the mixed water falls below the set temperature, the thermowax contracts, the piston 62 contracts, the valve body 61 moves to the right in the figure, and the water supply passage 81 with the valve seat 8 is narrowed. The hot water supply passage 41 between the valve seat collar 4 and the valve seat collar 4 can be expanded to raise the temperature of the mixed water and adjust it to the set temperature.

[0008]

However, since the water pressure in the water supply passage 10 is usually much higher than the water pressure in the hot water supply passage 9, the hot water flowing into the hot water supply passage 41 from the hot water supply passage 41 has a high internal pressure. As a result, the inflow is blocked, the temperature of the mixed water does not rise sufficiently, and even if the mixed water flows in, it may not be mixed well with high pressure water.

The present invention has been made in view of such circumstances.
It is an object of the present invention to provide a thermo-valve cartridge with an excellent temperature control function that can mix hot and cold water well.

[0010]

The present invention has means for solving the above-mentioned problems as follows. That is, a valve with a thermostat, a valve seat collar that forms a hot water supply passage between one end side of the valve body, and a valve seat seat that forms a water supply passage between the other end side of the valve body are integrated. There is a thermo valve cartridge that can be exchangeably inserted into the body case of the hot and cold water mixing tap.
On one end side of the housing, a screw groove for screwing the valve seat collar is engraved and formed, while on the other end side,
A screw groove for screwing the valve seat is formed by engraving, and an O-ring that is in sliding contact with the sliding contact surface of the valve body is fitted to the inner peripheral surface of the intermediate portion of the O-ring. An opening corresponding to the hot water supply passage and an opening corresponding to the water supply passage are formed on both sides, and the shaft portion of the valve body is loosely fitted in the opening formed in the valve seat to form the thermostat. While the piston attached to the other end is projected to the other end side, a spring for urging the valve body to the other end side is interposed between the valve seat collar and the valve body, and the valve seat collar A ring-shaped guide portion, which faces the inside of the valve body at a distance and is opposed to the hot water supply passage, is integrally provided on the peripheral edge of the opening on the other end side.

[0011]

With the ring-shaped guide portion provided on the other end side opening peripheral edge of the valve seat collar, the water pressure of the water introduced into the guide portion may affect the hot water flowing into the cartridge from the hot water supply passage. On the other hand, the hot water is introduced inside along the guide part, and the mixing of the hot water is done well.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a thermovalve cartridge according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of a thermovalve cartridge 3 inserted in a main body case 2 of a hot and cold water mixing valve (see FIG. 3), and FIG. 2 is an exploded perspective view thereof. In these drawings, reference numeral 31 is a housing, and 4 is a A valve seat collar screwed to one end of the housing 31,
Reference numeral 5 is a spring, 6 is a valve with a thermostat which is urged to the other end side (right side in FIG. 1) of the housing 31 by the spring 5, and 7 is fitted in an intermediate portion of the housing 31 to slide the valve body 61. O-ring that makes sliding contact with the contact surface,
8 is a valve seat.

A ring-shaped guide portion 4a, which faces the inside of the valve body 61 with a space, is integrally formed on the periphery of the opening on the other end side of the valve seat collar 4, and the valve body 6 is formed.
The guide portion 4a is opposed to the hot water supply passage 41 formed between the one end side of the No. 1 and the hot water supply passage 41. The guide portion 4a has such a width (height) that the tip thereof reaches the substantially central position of the valve body 61, and a gap of about 1.5 mm is formed between the guide portion 4a and the inner surface of the valve body 61. Formed to have an outer diameter. By providing this guide portion 4a,
As will be described later, the hot water can be introduced without being affected by the water pressure of the water, the hot water can be mixed with good responsiveness, and the temperature control accuracy can be stably improved.

The housing 31 described above is provided with a screw groove 32 for screwing the valve seat collar 4 on the inner peripheral edge at one end thereof, while the valve seat 8 is integrated at the other end thereof. In the middle, the opening 34 communicating with the hot water supply passage 9 and the water supply passage 10
An opening 35 that communicates with the
An O-ring 7 is fitted on the inner peripheral surface of the housing between them.
Reference numeral 11 is a hot and cold water mixing chamber, 12 is a shower channel, 13 is a faucet channel, and 14 is a switching plug connected to a switching handle 15 (see FIG. 3). In FIG. 3, reference numeral 23 denotes a hot-water tap mounting screw, and 24 denotes a hot-water tap mounting screw.

The thermostatted valve 6 housed in the housing 31 has a cylindrical valve body 61 having a sliding contact surface 61a coated with a fluororesin, and a thermowax incorporated therein to expand and contract the piston 62 according to the water temperature. A thermoelement (thermostat) 63 to be operated is integrally formed, and one end side of the valve body 61 and the valve seat collar 4 are formed.
And a water supply passage 81 is formed between the other end and the valve seat 8, and the circumferential sliding contact surface 61 a of the valve body 61 is formed in the housing 31. Sliding contact is made with the O-ring 7 fitted on the inner peripheral surface, and hot water is separated. The shaft portion 61b of the valve body 61 is loosely fitted into the opening 8a formed in the valve seat 8 in a watertight state via the O-ring 7, and the valve body 61 moves in a watertight state with respect to the valve seat 8. It is free. Note that FIG.
In the figure, c is a retaining ring for restricting the length of the piston 62.

Reference numeral 16 designates a core bearing which comes into contact with the tip of the piston 62 to regulate its position, 17 a spring which urges the core bearing 16 toward the piston side, 18 a slide guide which guides the core bearing 16 and 19 a warmer. A spigot connected to the adjusting handle 20 (see FIG. 3) is splined to the base of the slide guide 18 screwed on the inner peripheral surface of the temperature adjusting upper body 21,
By rotating the temperature control handle 20, the slide guide 18 is moved forward and backward, and the set position of the valve main body 61 is variably adjusted via the piston 62 so that the set value of the hot water supply temperature can be adjusted. Has become. In addition, in FIG. 1, s is a stopper for preventing the core support 16 from coming off.

The temperature control function of the hot and cold water mixing valve 1 constructed as above will be described. The hot water introduced from the hot water supply passage 41 along the guide portion 4a is not affected by the high pressure of the water. It is guided up to around the central portion of the valve body 61 and mixed with water in the guide portion 4a. Therefore,
The proportion of the amount of hot water supplied is not reduced by the water pressure of the water, and it is extremely responsive and mixing of hot water is performed.
The temperature control accuracy is improved.

When the mixed water temperature rises above the set temperature, the thermoelement 63 senses the temperature, the thermowax expands and pushes out the piston 62, the valve body 61 moves leftward in the drawing, and the valve seat collar 4 ( (See FIG. 1), the hot water supply passage 41 between the hot water supply passage 41 and the valve seat seat 8 is narrowed, the mixed water temperature is lowered, and the temperature is automatically adjusted to the set temperature (see FIG. 4A).

When the temperature of the mixed water falls below the set temperature, the thermowax contracts, the piston 62 contracts, the valve body 61 moves to the right in the figure, and the water supply passage 81 with the valve seat 8 is narrowed. The hot water supply passage 41 between the valve seat collar 4 and the valve seat collar 4 is expanded, the temperature of the mixed water is raised, and the temperature is automatically adjusted to the set temperature [see FIG. 4 (B)].

Even in the above-described automatic temperature control process, since the guide portion 4a is provided, the mixing of the hot water and the water can be performed with good response and without delay, so that it is needless to say that a stable temperature control accuracy can always be obtained. .

The thermo-valve cartridge 3 constructed and functioning as described above has extremely good workability in assembling and has excellent workability in handling. The assembly procedure will be described. First, the valve seat 8 is screwed into one end of the housing 31, the spring 5 is fitted into the housing 31, and the thermostatted valve 6 is inserted. By assembling the valve seat 8 with the other end of the housing 31, the assembly is completed.

In the case of the present embodiment, since the diameter of the valve body 61 is set to be relatively small, the spring load of the spring 5 can be set to a small value. It can be easily assembled without the need for a special tool, the sealing property is improved, and the temperature control accuracy is improved.

The valve body 61 is attached to the housing 31.
The sliding contact surface 61a during handling work such as loading and unloading into the main body case 2.
Are not flawed, handling operability is extremely good, and maintenance management is very advantageous.

[0024]

As described above, according to the thermo-valve cartridge of the present invention, the ring-shaped guide portion facing the hot water supply passage in the valve main body with a space is provided in the valve seat collar. Since it is integrally projected at the edge of the end side opening, the water pressure of the water introduced into the guide part does not hinder the inflow of hot water into the cartridge from the hot water supply passage, and the hot water flows along the guide part. Introduced inside, mixing of hot and cold water is done well, and temperature control accuracy improves with good responsiveness.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a thermovalve cartridge of the present invention.

FIG. 2 is an exploded perspective view of the thermovalve cartridge.

FIG. 3 is a partial sectional view of a hot and cold water mixing tap incorporating the thermovalve cartridge.

FIGS. 4A and 4B are explanatory diagrams of a temperature control operation of the thermovalve cartridge. FIGS.

FIG. 5 is a sectional view showing an example of a conventional thermovalve cartridge.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hot water mixing tap, 2 ... Body case, 3 ... Thermo valve cartridge, 32, 33 ... Screw groove, 34, 35 ... Opening,
4 ... Valve seat collar, 4a ... Guide part, 41 ... Hot water supply passage, 5
... Spring, 6 ... Thermostatted valve, 61 ... Valve body, 61a ... Sliding contact surface, 61b ... Shaft part, 7 ... O-ring, 8 ... Valve seat, 8a ... Open hole, 81 ... Water supply passage.

Claims (1)

[Claims] 1. A thermostatted valve, a valve seat collar that forms a hot water supply passage between the valve body and one end side of the valve body, and a valve seat seat that forms a water supply passage between the thermostatted valve and the other end side of the valve body. Is a thermovalve cartridge that is inserted into the main body case of the hot and cold water mixing plug in a replaceable manner, and a screw groove for screwing the valve seat collar is engraved and formed on one end side of the housing. On the other hand, a screw groove for screwing the valve seat is formed on the other end side, and an O-ring that is in sliding contact with the sliding contact surface of the valve body is formed on the inner peripheral surface of the intermediate portion thereof. And an opening corresponding to the hot water supply passage and an opening corresponding to the water supply passage are formed on both sides of the O-ring, and the shaft portion of the valve body is inserted into the opening formed in the valve seat. Let it fit in a watertight state, While the piston attached to the thermostat is projected to the other end side, a spring for urging the valve body to the other end side is interposed between the valve seat collar and the valve body, and the valve is A thermo-valve cartridge characterized in that a ring-shaped guide portion, which faces the inside of the valve body at a distance and is opposed to the hot water supply passage, is integrally provided at the periphery of the opening on the other end side of the seat collar. .