JPS594530Y2 - Temperature control switch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature control switch device having at least two single-pole double-throw switches and used for a thermostat for heating and cooling of an air conditioner, or for a two-stage, stage, etc.

Generally, in the liquid-filled type, the magnitude of the operating force of the switch does not have much effect, and the operating position is determined by the stroke of the switch.

Therefore, the conventional type had two switches arranged in two rows horizontally, but in the gas-filled type, the operation force is negligible because it operates based on the balance of force with the gas pressure determined by the temperature. There is no value.

Therefore, in a switch arrangement such as a liquid-filled type, the force that the bellows lever receives from these switches is not symmetrical during temperature-raising operation and temperature-lowering operation, and depends on the differential width of each switch and the stage between the switches. It is difficult to match the width.

Here, the differential width refers to the temperature range in which each switch opens and closes, and the stage width refers to the temperature range from when one switch opens and closes to when the other switch opens and closes.

The present invention was developed in view of the above-mentioned problems.The lever is of a seesaw type, which is rotated by a heat-sensitive element, and switches are installed at the bottom of both ends, so that the operating forces of the switches are opposed to each other, and the operating force of the other party is reduced. By using the reverse, the desired differential and stage width can be obtained in a symmetrical manner with temperature rising and cooling benefits.Also, a temperature control switch device is provided with an adjustment mechanism at one end of the lever so that the combination of these switches can be freely selected. The purpose is to provide

An embodiment of the temperature control switch device of the present invention will be described based on the accompanying drawings.

Reference numeral 1 denotes a heat sensitive section, which detects changes in the ambient temperature.

Reference numeral 2 denotes a bellows, which expands and contracts in accordance with changes in the ambient temperature detected by the heat sensitive section 1 and changes in the medium (gas) sealed within the bellows 2.

3 is a protrusion, which is provided at the tip of the bellows 2.

4 is a protrusion, which is pressed against the protrusion 3;

Reference numeral 5 denotes a bellows lever, which is rotated around a support shaft 6 that corresponds to the displacement of the bellows 2.

An insulating button 7 is attached to one end of the bellows lever 5, and is attached to the surface of the bellows lever 5 opposite to the projection 4.

Reference numeral 8 denotes a single-pole double-throw switch, which is disposed coaxially below the axis of the bellows lever 5.

Reference numeral 9 denotes a push spring for the switch 8, which is pressed by the insulating button 7.

Reference numeral 10 denotes a movable contact, which is moved by a push spring 9.

11 and 12 are fixed contacts, one of which is always in contact with the movable contact 10.

13 is a differential adjustment screw, and movable contact 1
0 and the fixed contact 11 are adjusted.

This adjustment of the contact spacing determines the differential width of the switch 8.

Reference numeral 14 denotes a hexagonal screw, which is attached to the hole 15 at the other end of the bellows lever 5 so that its diameter can be adjusted.

Reference numeral 16 denotes a rotation stopper pad for the hexagonal screw 14.

17 is an insulating button whose position can be changed up or down by turning the hexagonal screw 14.

18 is a single-pole double-throw switch, which, like the switch 8, is disposed coaxially with the axis of the bellows lever 5.

19 is a push spring for the switch 18, and the insulating button 17
Pressed by.

By changing the position of the insulation button 17, the switch 1
The stage width for the switch 8 of 8 can be changed.

If the stage width is to be increased, the position of the insulating button 17 may be raised upward, and if the stage width is to be reduced, the screw 14 may be turned so as to be moved downward.

Reference numeral 20 denotes a movable contact of the switch 18, which is moved by a push spring 19.

21 and 22 are fixed contacts, and in the initial state of this embodiment, the movable contact 20 is in contact with the upper fixed contact 21.

23 is a differential adjustment, and a fixed contact 22
Adjust the contact spacing to determine the contact spacing.

This contact spacing determines the differential width of switch 18.

24 is a register spring, one end of which is hooked onto a hook 25 provided at the center of the bellows lever 5.

A nut 26 is fitted to the other end of the range spring 24, and an adjustment screw 27 is screwed into the nut 26 via a cam arm 28.

A cam 29 is in contact with the cam arm 28.

30 is a support shaft of the cam arm 28, and when the cam 29 is rotated, the cam arm 28 rotates around the support shaft 30.

The operation of the temperature regulator according to the present invention will be explained.

When the heat sensitive section 1 detects the ambient temperature, the pressure of the medium (gas) sealed within the heat sensitive section 1 changes.

This gas pressure change is transmitted into the bellows 2 and displaces the protrusion 3.

Now, in order to simplify and clarify the operation of the temperature control switch device of the present invention, the temperature when the bellows 2 is contracted to the maximum is defined as the reference temperature t.

shall be.

Reference temperature t. , the bellows lever 5 presses and rotates the bellows 2 in the clockwise direction at the protrusion 4 by the tensile force of the range spring 24.

At this time, the movable contact 10 of the switch 8 is connected to the lower fixed contact 1.
2 and is in an open state (OFF state).

Further, the movable contact 20 of the switch 18 is connected to the upper fixed contact 21.
However, this switch 18 is also in the open state (OFF).
condition).

Next, when the ambient temperature rises to temperature t1, the bellows 2
expands and rotates the bellows lever 5 counterclockwise.

At this time, the movable contact 20 of the switch 18 switches from the upper fixed contact 21 to the lower fixed contact 22, and is in the closed state (ON).
state).

However, the movable contact 10 of the switch 8 does not operate because the push spring 9 is not pushed down to the switching position.
It remains open.

At this time, the force F required for bellows 1 is the range spring 2
The force F of the bellows 2 is F=
Range spring force + (force of switch 8 switch 18
power).

The force relationship in parentheses above can be easily changed by adjusting the screw 14 up and down, and the necessary stage width can be obtained.

Furthermore, when the ambient temperature rises to temperature t2, the bellows 2
further expands, rotating the bellows lever 5 counterclockwise, and the movable contact 10 of the switch 8 switches from the lower fixed contact 12 to the upper fixed contact 11, and is now in the closed state.

Next, assume that the ambient temperature drops to an arbitrary temperature t3.

At this time, the bellows 1 contracts again and the bellows lever 5 is rotated clockwise.

The movable contact 10 of the switch 8 is switched from the upper fixed contact 11 to the lower fixed contact 12 and becomes open.

The switch 18 still remains closed and does not operate at this temperature t3.

When the ambient temperature further decreases, the switch 18 reaches the reference temperature t.

When it is removed, it switches from the closed state to the open state and returns to the initial state.

Here, the temperature t3 at which switch 8 is turned off and switch 1
The relationship between the temperature t1 at which switch 8 turns on is determined by the respective inherent differential widths of switch 8 and switch 18 and the relative stage widths of switch 8 and switch 18. Ru.

For example, the temperature t3 of the switch 8 is changed to the temperature t3 of the switch 18.
If you want it to be equal to 1, switch 18 of switch 8 (
The intermediate width of the two stages may be made equal to the differential width of the switch 8.

Further, if it is desired to make the temperature t3 of the switch 8 higher than the temperature t1 of the switch 18, the stage width of the switch 8 may be made larger than the differential width of the switch 18.

Conversely, if the temperature t3 is desired to be lower than the temperature t1, the stage width of the switch 8 may be made smaller than its differential width.

In the above operation, the temperature when the bellows 2 is at its maximum contraction is set as the reference temperature, but it is easy to perform the same operation even if the temperature at which the bellows 2 is at its maximum expansion is set as the reference temperature. be understood.

Note that the reference temperature is selected using the adjustment screw 27.
Further, the range of the reference temperature can be varied by the cam 29.

According to the temperature control switch device of the present invention, the first and second switches are arranged at both ends of the bellows lever on the opposite side of the contact point between the bellows and the bellows lever, and open and close as the bellows lever rotates. Because of the differential configuration, the force applied to the bellows lever is from O to F.
.

(F, -F2), the spring constant of the range spring can be weakened (smaller), and the range of adjustment of the hexagonal screw can be easily adjusted.

[Brief explanation of the drawing]

The drawing is a schematic diagram showing an embodiment of the present invention. 1... Heat sensitive part, 2... Bellows, 3.
...Protrusion, 4...Protrusion, 5...
Bellows lever, 8... Switch, 14...
...Hexagonal screw, 18...Switch, 27...
...adjustment screw, 29...cam.

Claims (1)

[Claims for Utility Model Registration] A bellows lever 2 having a temperature-sensitive medium sealed in it and expanding and contracting as the ambient temperature rises and falls, and a bellows lever having two arms around a support shaft 6, one of which a bellows lever 5 whose intermediate portion of the arm abuts the bellows and receives a rotational force in a counterclockwise direction as the bellows expands about the support shaft; first and second switches 8 and 18, which are arranged at both ends of the bellows lever opposite to the point of contact between the bellows and the bellows lever, and whose opening and closing operations are differentially performed as the bellows lever rotates; and the second switch. a first adjustment member 14.17 that abuts on the bellows lever and is provided at the end of the other arm of the bellows lever to adjust the stage width of the first and second switches; A temperature control switch device characterized in that it comprises a range spring 24 tensioned against the bellows so as to do so, and a second adjustment member having cam means 28, 29 for adjusting the tension of the range spring.