JPS62159087A - Wax thermoelement - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention works by increasing the pressure of the wax sealed in the body, which serves as the temperature-sensing part, by increasing the temperature.

The present invention relates to an improvement in a wax thermoelement that operates so that a piston that is inserted into a guide tube continuous with a body is pushed out.

As shown in FIG. 1, the wax thermoelement A is a case-shaped body 1 filled with a wax W selected to melt and expand at a desired temperature. The piston 3 fitted into the guide tube 2 connected to the body 1 is pushed out by the pressure of the expanding wax. In order to accurately correspond to the set temperature, the pressure of the wax is not directly transmitted to the piston 3, but is transmitted to a fluid 4 with good fluidity, and the piston 3 is actuated by the flow of the fluid 4. and therefore the body l
The wax W filled inside is sealed and enclosed with a diaphragm 5 that covers the opening 1a of the body 1, and the base end of the diaphragm 5 is joined to the outside of the body 1, as shown in FIG. The guide cylinder part 2 is tightly attached,
A highly fluid fluid 4 is sealed in the enlarged diameter proximal end lumen of the guide cylindrical portion 2, and the fluid 4 is sealed by a rubber piston 6 and a Teflon plate 7 fitted into the lumen of the guide cylindrical portion 2. By fitting the piston 3 on the outside of the body 1, the expansion of the wax W in the body 1 is transmitted to the fluid 4 with good fluidity through the diaphragm 5, and the movement of the fluid 4 pushes the piston 3. It is configured to output. The diaphragm 5 seals the wax W filled in the body 1, which melts and expands as the temperature rises.
In order to ensure a secure seal so that the fluid does not leak out and get mixed into the fluid 4, a rib 50 is provided on the periphery, and this rib 50 fits into the fitting recess formed on the bottom surface of the base end of the guide cylinder section 2. It is made to fit tightly into the portion 20. For this reason, this diaphragm 5 has a problem in that severe precision is required in the shape of the rib 50 and the machining of its peripheral surface, making the manufacturing process extremely troublesome.

The present invention was made to solve this problem, and it is possible to securely seal the wax filled in the body against the highly fluid fluid 4 without requiring troublesome processing or precision. The purpose is to provide new means.

In the present invention, as a means to achieve this object, waxes are sealed in a bag made of a flexible sheet or film, and the bag is loaded into the body, and the outer peripheral surface of the bag is The present invention proposes a wax thermoelement that is characterized in that it comes into contact with a fluid sealed in a guide cylinder part that is assembled to an intermediary body.

Next, embodiments will be described in detail with reference to the drawings. Note that the same reference numerals in the drawings as in the conventional means are used for constituent members having the same effect.

Figure 2 shows a wax thermometer (A) in which the present invention can be implemented.
In Figure 1, l is a case-shaped body, W is wax loaded in the body 1,
2 is a guide tube whose base end 2a is joined to the opening 1a of the body 1 and caulked to the body 1; 3 is a piston that can be inserted into and out of the guide tube 2; 4 is a guide tube 2. 6 is a rubber piston installed in the guide cylinder 2, and 7 is a fluid inside the guide cylinder 2 outside the rubber piston 6. It shows Teflon plates stacked one on top of the other.

Thus, the wax W loaded into the inner cavity of the body L
is melted and expanded in a bag 8 (or a sac) formed of a flexible sheet or film made of a flexible material such as synthetic resin or rubber, as shown in Figure 3. At the same time, the inside of the bag B is evacuated to a vacuum, and the opening 80 of the bag 8 is sealed by heat welding, etc., and when the wax W solidifies and contracts due to the temperature drop, as shown in Figure 4. The bag 8 is made to be compressed by the volume of the wax W that has contracted, and in this state, the bag 8 is loaded into the body 1.

The opening 1a of the body 1 is left open without the diaphragm 5, and the bottom surface of the proximal end 2a of the guide tube 2 is brought into contact with the edge of the opening 1a.
Moreover, an O-ring 9 is interposed on the joint surface, and this O-ring 9 is inserted.
It is sealed by ring 9.

Furthermore, the highly fluid fluid 4 sealed in the inner cavity of the proximal end 2a of the guide tube 2 is brought into direct contact with the outer peripheral surface of the bag 8 so as to wrap around the outer circumference of the bag 8. It is sealed so as to extend from the inner cavity of the part 2 to the inner cavity of the body 1.

The bag 8 that seals the wax W may have any shape or structure, such as a bellows shape.
The material may be selected as desired, such as a metal plate.

The embodiment device configured as described above operates as follows.

When the temperature of the external part of the body 1 serving as the temperature sensing part is lower than the set temperature set by selecting the composition of the wax W, the wax W is in a solidified and contracted state, and the piston 3 is thereby retracted. It is in a state of confinement.

Furthermore, when the temperature of the wax W rises to the set temperature tool E due to the rise in the temperature of the outer periphery of the body 1, the wax W melts and expands, pushing the bag 8 to expand, and the pressure causes the fluid 4 to flow into the guide tube. 2 into the inner cavity, and the piston 3 is pushed out.

At this time, the bottom surface of the base end 2a of the guide cylinder 2 and the body 1
The O-ring 9 interposed on the contact surface with the mouth edge of the opening 1a reliably prevents leakage of the fluid 4 from the contact surface.

As explained above, the wax thermoelement according to the present invention encloses wax in a bag made of a flexible sheet or membrane, loads the bag together into the body, and then attaches it to the body through the outer peripheral surface of the bag. Since it is configured so that it comes into contact with the fluid sealed in the guide cylinder, the wax expands and contracts while it is sealed in the bag (or bag body), and the pressure caused by the expansion and contraction occurs. Fluctuations become the expansion and contraction of the bag and are transmitted to the fluid with good fluidity that is in contact with the outer periphery of the bag, so the diaphragm to isolate wax and the fluid with good fluidity can be omitted, and the diaphragm It becomes possible to obtain a wax thermoelement that operates accurately by eliminating the troublesome precision processing required for manufacturing.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view of a conventional wax thermoelement, Fig. 2 is a longitudinal sectional front view of a wax thermoelement in which the present invention can be implemented, Fig. 3 is a longitudinal sectional view of a bag containing the same wax, and Fig. 4. is an explanatory diagram of the same effect as above. Explanation of drawing symbols A: Wax thermodynamic element: Body 1a: Opening portion 2: Guide cylinder portion 2a: Base end portion 20: Fitting recess portion
3... Piston 4... Fluid 5... Diaphragm 50... Rib 6... Rubber piston 7.
...Teflon plate 8...Bag (or sac) 80...
Opening 9...0 ring W...Wax 1st section A and 2nd wJ

Claims (1)

[Claims] Wax is sealed in a bag made of a flexible sheet or film, etc., and the bag is loaded into the body, and the bag is brought into contact with the fluid sealed in the guide tube that is attached to the body through the outer peripheral surface of the bag. Features a wax thermo element.