JPS639079Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a temperature regulator.

Conventionally, this type of temperature controller automatically repeats on/off operations at preset upper and lower temperature limits to keep refrigerators, etc., close to the set temperature.・Some devices that change the off-temperature in parallel are known, but there are also some that can keep the on-temperature constant and adjust only the off-temperature according to seasonal temperature changes, or vice versa. requested.
Furthermore, in the event of an abnormality in the refrigeration system, etc., there is a need for a temperature controller that has the function of manually stopping the operation of an automatically operating refrigerator, etc., regardless of the temperature of the temperature sensing part of the temperature controller. has been done.

The present invention was developed in consideration of these points, and allows for accurate adjustment of either the off temperature or the on temperature, and a manual operation for turning the switch off or on regardless of the temperature of the temperature sensing part. The present invention provides a temperature controller with functions.

Next, one embodiment of the present invention will be described based on the drawings.

In FIG. 1, reference numeral 1 denotes a box-shaped frame with an open bottom, and a conversion mechanism 2 formed by a diaphragm or bellows or the like that converts temperature changes into pressure changes is provided on one side of the bottom opening of the frame 1. A capillary tube 3 filled with a gas whose pressure changes depending on the temperature, such as Freon gas, is connected to the conversion mechanism 2, and the actuating protrusion 4 of the conversion mechanism 2 advances or retreats by detecting the temperature at the temperature sensing portion at the tip of the capillary tube 3. It's becoming like that.

Reference numeral 5 denotes a lever, and this lever 5 has a fulcrum part 6 protruding from both sides of the center, and the fulcrum part 6 rotatably engages with a cutout part 7 in both side plates of the frame 1.
A manual operation tab 8 is provided on the left side of the fulcrum portion 6 in FIG. The lever 5 is rotated about the fulcrum 6 by the forward and backward movement of the operating protrusion 4. Additionally, a range spring mounting tab 10 is provided on the right side of the fulcrum portion 6 of the lever 5 in FIG.
is provided to protrude upward, and an insulator 11 made of an insulating material is attached to cover the lower and side surfaces of the lever 5, and a protrusion 12 is formed on the lower surface of the insulator 11. One end of the range spring 13 is engaged with the range spring mounting tab 10, and the range spring nut 1 is attached to the other end of the range spring 13.
4 is fixed, and this range spring nut 14
A range screw 15 whose head is rotatably engaged with the frame 1 is screwed onto the frame 1 to hold the lever 5 in the notch 7 of the frame 1 and urge the lever 5 counterclockwise. ing. This biasing force is applied to the range screw 1 during assembly.
Adjustment can be made by rotating the range spring nut 14 and moving the range spring nut 14 forward or backward.

Reference numeral 16 designates a cut-out lever. The cut-out lever 16 has fulcrum portions 17 protruding from both sides of one end. A tab 19 for attaching a cutout spring is provided on the upper surface of the lever 5, and a projection 20 is formed on the lower surface of the lever 5, and this projection 20 abuts the upper surface of the lever 5 near the end thereof.

21 is a cam slide, this cam slide 21
A slide portion 22 is formed protrudingly on both sides, and the slide portion 22 movably engages with a step portion 23 formed by cutting and raising the upper surface of the frame 1 downward into a hook shape,
In FIG. 1, the slide portion 22 has a cut-out screw fixing portion 24 bent downward on the left side, and a cam sliding portion 25 bent downward on the right end thereof. There is. As shown in FIG. 2, one end of the cutout spring 26 is engaged with the tab 19 of the cutout lever 16, and a cutout spring nut 27 is fixed to the other end of the cutout spring 26. Cam slide 21 to nut 27
A cut-out screw 28 whose head is rotatably engaged with the fixing portion 24 of the frame 1 is screwed, and the cut-out spring 26 urges the cut-out lever 16 leftward to open the cut-out of the frame 1. The engagement with the portion 18 is maintained. Further, the tension of the cut-out spring 26 is caused by the force that tries to make the fulcrum part 17 of the cut-out lever 16 and both ends of the cut-out spring 26 in a straight line because they are not in a straight line, that is, the tab 19 of the cut-out lever 16 As a result, the cut-out lever 1
The protrusion 20 of 6 presses the upper surface of the right end of the lever 5 to suppress rotation of the lever 5 in the counterclockwise direction.
This suppressing force can be adjusted during assembly by rotating the cutout screw 28 and moving the cutout spring nut 27 forward or backward.

A dial shaft 29 is rotatably attached to the frame 1 by a bush 30 and a nut 31, and has a cam 32 and an off-cam 33 fixed to its lower end. This cam 32 comes into contact with the cam sliding portion 25 of the cam slide 21 as shown in FIGS. 21
is moved to change the tension of the cutout spring 26 to adjust the force with which the cutout lever 16 restrains the lever 5 from rotating in the counterclockwise direction. and the off cam 3
3 is rotated together with the cam 32 by rotating the dial shaft 29, and the position shown in _FIG. When the cam sliding portion 25 of the cam slide 21 is further rotated clockwise from the abutting state, the operating portion 33a of the off cam 33 presses the manual operation tab 8 of the lever 5 to the left, and the lever 5 The first
It is forcibly rotated counterclockwise in the figure.

34 is a switch, and this switch 34 accommodates in a case 35 a contact mechanism 36 that is turned on or off by being pressed against the protrusion 12 on the lower surface of the insulator 11 by clockwise rotation of the lever 5; As shown in FIGS. 2 and 3, stoppers 37 are provided projecting from the top of both sides of the case 35. This stopper 37 stops the cutout lever 16 from pressing against the lever 5 before the lever 5 turns on or off the contact mechanism 36 of the switch 34, as shown in FIG.

Next, the operation of this embodiment will be explained.

When the temperature of the temperature sensing part at the tip of the capillary tube 3 shown in FIG.
is pressed, and the lever 5 begins to rotate clockwise about the fulcrum 6 against the tension of the range spring 13. At this time, the cutout lever 16 is moved to the lever 5 by the tension of the cutout spring 26.
However, before the lever 5 turns on or off the contact mechanism 36 of the switch 34, it comes into contact with a stopper 37 provided on the case 35, as shown in FIG. After the pressing is stopped, the clockwise rotational force of the lever 5 is determined only by the tension of the range spring 13, and when the temperature reaches a certain level adjusted by the range screw 15 during assembly, the contact mechanism 36 is pressed by the protrusion 12. turned on or off.

Then, when the temperature of the temperature sensing section decreases, the pressure of the gas in the capillary tube 3 decreases, and the lever 5 begins to rotate counterclockwise about the fulcrum section 6 due to the tension of the range spring 13. And lever 5
contacts the protrusion 20 of the cut-out lever 16 before the contact mechanism 36 is turned off or on, and thereafter the cut-out lever 16 is also lifted. And lever 5 is cutout lever 16
The contact mechanism 36 is further rotated counterclockwise against the load of , and the contact mechanism 36 automatically returns to turn off or on. The load on the cutout lever 16 can be changed by rotating the dial shaft 29 and moving the cam slide 21, and the temperature at which the cam slide 21 is turned off or on can be adjusted.
When the cam sliding portion 25 of No. 1 is in contact with the maximum diameter portion A _c of the cam 32 shown in FIG. The load on the cutout spring 26 becomes maximum, and the temperature at which the lever 5 releases the pressure on the contact mechanism 36 and the contact mechanism 36 turns off or on becomes the lowest. and,
When the cam 32 is rotated counterclockwise in FIG. 4 from this position, the cam sliding part 25 gradually moves to the right, and the cutout spring 2
6 also becomes smaller, and the lever 5 becomes the contact mechanism 36.
The temperature at which the contact mechanism 36 turns off or on after releasing the pressure on the contact mechanism 36 gradually increases, and as shown in FIG.
When it comes into contact with A _w , the temperature at which the contact mechanism 36 turns off or on also increases.

Then, when the dial shaft 29 rotates the cam ₃₂ shown in FIG. Press the manual operation action tab 8 to the left,
The lever 5 is forcibly rotated in the counterclockwise direction in FIG. Turn off or on.

The temperature at which the contact mechanism 36 of the switch 34 turns on or off can be adjusted by rotating the range screw 15 during assembly and adjustment, moving the range spring nut 14 forward or backward, and adjusting the tension of the range spring 13. In addition, to adjust the off or on temperature adjustment range, rotate the cut-out screw 28 during assembly and adjustment to move the cut-out spring nut 27 forward and backward, and adjust the tension of the cut-out spring 26. This is done by

In this embodiment, the stopper 37 is provided on the case 35 of the switch 34, but it may be provided on the frame 1. Further, although the switch 34 is of a self-resetting type, a switch 34 that does not self-return may also be used. In this case, the lever 5 and the actuating part of the switch 34 are engaged, and the rotation of the lever 5 causes the switch 34 to be actuated. All you have to do is force the group to advance and retreat.

According to the present invention, the switch is rotatably provided on the frame and rotates by the operation of the conversion mechanism to turn on/off the switch.
The lever to be turned off is pressed by the cut-out lever, and a stopper is provided to stop the pressing of the cut-out lever in the middle of the switch's on/off stroke, so the temperature at which the switch operates remains constant, and Since the pressing force of the cut-out lever is adjusted by changing the tension of the cut-out spring using the cam slide and cam, the temperature at which the switch is released can be reliably adjusted. If the dial shaft is stuck and the dial shaft is rotated beyond the adjustment range of the switch deactivation temperature using the cam, the manual operation tab provided on the lever is pressed using the off cam, and the lever is forcibly moved in the direction to deactivate the switch. Because it rotates, the switch can be deactivated regardless of the temperature of the temperature sensing part, and it is possible to precisely adjust either the on temperature or the off temperature, and the temperature of the temperature sensing part can be adjusted. The present invention provides a temperature controller with a manual operation function to turn the switch off or on regardless of the temperature.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the temperature controller of the present invention, Fig. 2 is a front view showing its main parts, Fig. 3 is a side view showing its main parts, and Fig. 4 The figure is a bottom view showing the main parts. DESCRIPTION OF SYMBOLS 1... Frame, 2... Conversion mechanism, 5... Lever, 8... Manual operation tab, 13... Range spring, 16... Cutout lever, 21...
Cam slide, 29...Dial shaft, 32
...Cam, 33...Off cam, 34...Switch, 37...Stopper.

Claims (1)

[Scope of utility model registration request] a frame, a conversion mechanism attached to the frame that converts temperature changes into pressure changes, a lever rotated by the operation of the conversion mechanism, a switch operated by rotation of the lever, the frame and the lever. and a cut-out lever that is rotatably attached at one end to the frame and opposite the lever, and a cut-out lever that is movably attached to the frame. a cam slide stretched between the cam slide and the cut-out lever; rotation of the cut-out lever in a direction to press the lever and release the operating state of the switch; a cutout spring that suppresses the rotation of the cutout lever, and a stopper that prevents rotation of the cutout lever to stop pressing the lever and maintain a constant operating temperature of the switch before the lever operates the switch;
a cam that adjusts the tension of the cut-out spring and the deactivation temperature of the switch by moving the cam slide; a dial shaft to which the cam is fixed and rotatably provided on the frame; and the dial; An off cam fixed to the shaft and rotating together with the cam, and a dial shaft protruding from the lever that is pressed by the off cam by rotating the dial shaft beyond the adjustment range of the deactivation temperature for the switch of the cam. and a manual operation tab for rotating the switch in a direction to release the switch.