JP2654938B2 - Thermo valve cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermo-valve cartridge which can be inserted into a hot-water mixer tap or the like.

[0002]

2. Description of the Related Art A thermovalve 6 as shown in FIG. 5, for example, is incorporated in a main body case of a hot and cold water mixing tap to automatically adjust a hot water supply temperature. The thermo-valve 6 includes a thermo-element 63 containing a thermo-wax and a piston 62. When the thermo-element 63 senses the temperature of the mixed water, the thermo-wax expands and pushes the piston 62 to change the position of the thermo-valve 6. By doing so, the gap between the water supply side passage and the hot water supply side passage is adjusted. In the figure, reference numeral 15 denotes a switching handle, 51 denotes a water outlet, 4 denotes a collar, 5 denotes a spring, 52
Is a guide, 8 is an inset sheet, 21 is a temperature control upper body, 5
3 is a point cover, 54 is an insert, 20 is a temperature control handle, b is a screw, and 55 is a cap.

[0003]

The above-described conventional thermovalve 6, together with the collar 4, the spring 5, the guide 52 and the fitting sheet 8, is commercially supplied as a set of replacement parts, and can be replaced as needed.

However, in the replacement work, the spring 5 has a relatively high resilience and the sliding surface 61a of the thermo valve 6 is easily scratched. there were.

The present invention has been made in view of such circumstances,
An object of the present invention is to provide a thermovalve cartridge which has good workability in assembling, does not easily damage the sliding surface of the valve, and has good workability in handling.

[0006]

According to the present invention, means for solving the above-mentioned problems are constituted as follows. That is, a valve with a thermostat, a valve seat collar forming a hot water supply passage between one end of the valve body, and a valve seat seat forming a water supply passage between the other end of the valve body are integrated. A thermo-valve cartridge that is replaceably inserted into the main body case of the hot and cold water mixing tap, and a screw groove for screwing the valve seat collar is formed in one end of the housing, On the other end side, a screw groove for screwing the valve seat is formed, and an O-ring that is in sliding contact with the sliding contact surface of the valve body is fitted on an inner peripheral surface of an intermediate portion thereof. An opening corresponding to the hot water supply passage and an opening corresponding to the water supply passage are opened on both sides of the O-ring, and the valve body is biased toward the other end between the valve seat collar and the valve body. Sprites to do The shaft of the valve body is loosely fitted to the opening formed in the valve seat in a watertight state, and the piston attached to the thermostat is projected to the other end. It is characterized by.

[0007]

A valve seat collar is screwed into one end of the housing of the thermo valve cartridge , a spring is fitted therein, a valve with a thermostat is inserted, and then a valve seat is screwed into the other end of the main body. Then, the assembly of the thermo valve cartridge is completed.

Since the thermostatted valve is incorporated in the housing together with the spring and the valve seat, the sliding surface of the valve body is not damaged, and the work of attaching and detaching the hot and cold water mixing tap to and from the main body case is extremely easy. Becomes

[0009]

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 into a main body case 2 of a hot and cold water mixing tap 1 (see FIG. 3), and FIG. 2 is an exploded perspective view thereof.
Is a valve seat collar screwed to one end of the housing 31; 5 is a spring; 6 is a valve with a thermostat;
Is an O-ring and 8 is a valve seat.

The housing 31 is provided with a screw groove 32 for screwing the valve seat collar 4 on one inner peripheral edge thereof, and a screw for screwing the valve seat 8 on the other inner peripheral edge. Grooves 33 are respectively formed, and an opening 34 communicating with the hot water supply passage 9 and an opening 35 communicating with the water supply passage 10 are opened at an intermediate portion, and the O-ring 7 is fitted on the inner peripheral surface of the housing between the two openings 34, 35. Is equipped. 11 is a hot and cold water mixing room, 12
Is a shower channel, 13 is a faucet channel, and 14 is a switching tap 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 thermostat-equipped valve 6 housed in the housing 31 has a cylindrical valve body 61 having a sliding surface 61a coated with a fluororesin, and a built-in thermowax, which expands and contracts a piston 62 according to the water temperature. A thermoelement (thermostat) 63 to be operated is integrally formed, and one end of the valve body 61 and a 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 in a watertight state through an O-ring 7 into an opening 8a formed in the valve seat 8, 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.

Numeral 16 designates a core bearing which abuts against the tip of the piston 62 to regulate its position, 17 a spring for biasing the core bearing 16 toward the piston, 18 a slide guide for guiding the core bearing 16 and 19 a temperature guide. A stopper rod connected to the adjusting handle 20 (see FIG. 3) is spline-connected to the base of the slide guide 18 screwed on the inner peripheral surface of the temperature adjusting upper main 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 retaining the core receiver 16.

Referring to FIGS. 4A and 4B, the automatic temperature control function of the hot / water mixer tap 1 constructed as described above will be described. Upon warming, the thermowax expands and pushes the piston 62, and the valve body 61 moves leftward in the figure, narrowing the hot water supply passage 41 between the valve seat collar 4 (see FIG. 1) and the valve seat seat 8. The water supply passage 81 is widened to lower the temperature of the mixed water and adjust the temperature to the set 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 rightward in the figure, and the water supply passage 81 between the valve seat and the valve seat 8 narrows. The hot water supply passage 41 between the valve seat collar 4 is expanded to raise the temperature of the mixed water and adjust the temperature to the set temperature.

The thermovalve cartridge 3 configured and functioning as described above has a very good assembling workability, and has an excellent handling workability.

First, the assembling procedure will be described.
The valve seat collar 4 is screwed into one end of the housing 31, the spring 5 is fitted into the housing 31, the thermostat-equipped valve 6 is inserted, and the valve seat 8 is connected to the housing 31 via the O-ring 7. Assembling is completed by screwing to the end side.

In the case of this embodiment, since the diameter of the valve body 61 is set relatively small, the spring load of the spring 5 can be set small. It is easy to assemble without using a special tool, the sealing property is improved, and the temperature control accuracy is improved.

Then, the valve body 61 is connected 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.

[0019]

As described above, according to the thermovalve cartridge of the present invention, the spring and the valve with thermostat are incorporated in the housing in which the valve seat collar and the valve seat are screwed on both sides. Therefore, it can be assembled without requiring a special tool, and the assembling workability is extremely good.

Further, since the valve body is housed in the housing, the operation of attaching and detaching the hot / water mixer tap to / from the main body case becomes extremely easy without damaging the sliding contact surface, and the workability is extremely good. Become.

Moreover, since the O-ring is fitted on the inner peripheral surface of the housing and the valve body is inserted therein, the valve diameter can be set small, and the sealing performance is improved. By setting the spring load of the spring to be small, the above-described assembling workability can be further improved.

[Brief description of the 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 thermo valve 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 an exploded view of a conventional thermovalve set.

[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, 41 ... hot water supply passage, 5 ... spring, 6
... Valve with thermostat, 61 ... Valve body, 61a
... Sliding contact surface, 61b ... Shaft, 7 ... O-ring, 8 ... Valve seat, 8a ... Opening, 81 ... Water supply passage.

Claims (1)

(57) [Claims] 1. A valve with a thermostat, a valve seat collar defining a hot water supply passage between one end of the valve body, and a valve seat seat defining a water supply passage between the other end of the valve body. A thermo-valve cartridge which is integrally inserted into a main body case of a hot and cold water mixing tap so as to be replaceable, wherein a thread groove for screwing the valve seat collar is formed in one end of the housing. On the other hand, a screw groove for screwing the valve seat is formed in the other end side, and an O-ring that is in sliding contact with a sliding contact surface of the valve body is formed on an inner peripheral surface of an intermediate portion thereof. And an opening corresponding to the hot water supply passage and an opening corresponding to the water supply passage are opened on both sides of the O-ring, and the valve body is connected to the other end between the valve seat collar and the valve body. Spur for biasing While the ring is interposed, the shaft of the valve body is loosely fitted in a watertight state in the opening formed in the valve seat, and the piston attached to the thermostat is projected to the other end side. A thermo valve cartridge characterized by the following.