JPS6237583A - Damper thermostat with forced full opening mechanism - Google Patents

Abstract

PURPOSE:To enable switching of a damper thermostat for a low temperature chamber to a damper thermostat for a refrigerating chamber by operating a lever regardless of expansion and contraction of a bellows by a projection mounted at one end of the adjust lever to forcedly full open a damper. CONSTITUTION:A lever 4 having a supporting point 5 is formed like a hook 4', and a projection 14-c is bent to the bellows 2 side. The bellows 2 is expanded and contracted according to an excessive change of a heat-sensitive cylinder 3 to turn the lever 4 centering around the supporting point 5. A damper 6 is fixed to the forward end of the lever 4, and the operating value of a damper thermostat is adjusted by changing the screwed amount of a screw 9. When the damper thermostat is for a low temperature chamber, a cam 13 is rotated within a range where the projection 14-c is not brought into contact with a belly portion 4'. When the damper thermostat is for a refrigerating chamber, the cam 13 is rotated in such a manner as to contact the belly portion 4'. Thus, as a controller, the damper thermostat for the low temperature chamber can be switched to the damper thermostat for the refrigerating chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is used to adjust the temperature of a cold room, such as a refrigerator-freezer, which has a cold room, and also has a structure in which the cold room can be converted into a freezing room. This relates to a damper thermostat with a forced full opening mechanism that switches between a cold room and a freezing room in a refrigerator, etc.

Prior Art A conventional damper thermostat will be explained with reference to FIG. The lever 4 rotates around a fulcrum 6 attached to a body 11 due to the expansion and contraction of the refrigerant gas sealed in the closed container of the bellows 2 attached to the bottom plate 1 and the heat sensitive section 3. A damper 6 is attached to the tip of the lever 4 to open and close a ventilation duct (not shown) and adjust the amount of cold air discharged. The other end of the lever 4 is bent, a tension coil spring 7 is hooked onto the hook portion 4', and the other end is fixed to the adjustment lever 1o via a screw seat 8 with an adjustment screw 9. The adjustment lever 10 has a fulcrum portion 10-b hooked onto the body 11, and the other end 10-a abuts against a cam 13 rotatably fixed to the body 11 at a position facing the bottom plate 1 by an E/IJ song 2. has been done. The operating value of the damper thermostat is adjusted by adjusting the tension of the tension coil spring 7 by changing the screwing amount of the adjustment screw 9. Further, temperature adjustment by the customer is performed by rotating the cam 13, moving the adjustment lever 1o, and changing the tension of the tension coil spring 7.

Even if the damper thermostat with the above structure is used exclusively for cold rooms or for freezing, even if the temperature is adjusted, the damper will only be affected by the bellows when switching from a cold room to a freezing room, or vice versa, from a freezing room to a cold room. It is impossible to fully open the refrigerator when the refrigerator is closed, and it is not suitable as a controller for a multi-purpose refrigerator-freezer, which is a demand of customers these days.

Problems to be Solved by the Invention Many modern refrigerators are equipped with a freezer compartment, a refrigerator compartment, a vegetable compartment, and another independent room, ie, a cold room. There is a growing need for refrigerator-freezers that can be used more widely by converting this low-temperature chamber into a freezing chamber for customer convenience. However, with the damper thermos fan 1 described in the conventional example, it is impossible to switch between a low temperature room at around -3°C and a freezing room at around -20°C, and it cannot meet the needs of customers.

Means for Solving the Problems In the present invention, a heat-sensitive part filled with a refrigerant, a bellows, a lever that transmits the displacement of the bellows by expansion and contraction of refrigerant gas, a damper that opens and closes by rotation of the lever, and are attached to the lever. A tension coil spring that acts in the direction of suppressing the expansion of the bellows, an adjustment screw attached to the other end of the tension coil spring through a screw seat, an adjustment lever that fixes this adjustment screw, and an abutting slide on one end of the adjustment lever. A cam that moves to change the amount of displacement of the tension coil spring and a protrusion cut out at the other end of the adjustment lever are brought into contact with the lever by rotation of the adjustment lever, and the lever is connected to the damper regardless of the expansion and contraction movement of the bellows. By forcibly moving the controller to the fully open position, the controller can be used normally as a controller for a cold room, and by forcing the controller to fully open, it can be used as a controller for a freezing room.

Accordingly, the present invention has the above-mentioned configuration, and when the purpose is to adjust the damper thermostat to a low temperature room, the present invention includes: a heat-sensitive part filled with a refrigerant and a closed container of the bellows; a lever that transmits the displacement of the bellows by expansion and contraction of the refrigerant gas; Cold air can be adjusted by a damper that opens and closes by rotating a lever. In addition, when switching from a cold room to a freezing room in the same room, the cam of the damper thermostat of the present invention is rotated, and the adjustment lever in contact with the cam is rotated using one end of the adjustment lever as a fulcrum to make the adjustment. A protrusion cut and raised near the fulcrum of the lever comes into contact with the ventral surface of the lever, operating the lever regardless of the extension and contraction movements of the bellows, and forcing the damper to fully open.

Example An embodiment of the present invention is shown in FIGS. 1, 2, and 3.

Fig. 4 will be explained as a whole, but components that are the same as the conventional one will be given the same numbers and detailed explanations will be omitted. In Fig. 1, 4 indicates the head of the bellows 2 as the point of action a of the lever It is a lever whose fulcrum 5 is a part inserted into the side surface of the contact body 11, and a damper 6 is attached to one end of the lever. The bent portion at the other end of the lever 4 is shaped like a hook 4', and the lever 4 is attached by hooking one end of a tension coil spring 7, which exerts a force in a direction to suppress expansion and contraction of the bellows, to the hook 4'. . The other end of the tension coil spring 7 is fixed to an adjustment lever 10 with an adjustment screw 9 via a screw seat 8. As shown in FIG. 2, a protrusion 14-c is bent toward the bellows 2 and raised toward the cam 13 near the fulcrum of the adjustment lever.

Next, to explain the operation, when an excessive change occurs in the heat-sensitive tube 3, the internal gas pressure changes, so the bellows 2
performs an expansion and contraction operation, and the lever 4 rotates around the fulcrum 5. A damper 6 is attached to the tip of the lever to open and close a ventilation duct (not shown) and adjust the amount of cold air discharged.

A tension coil spring 7 is hooked on the flange of the lever 4, and the other end is fixed to an adjustment lever 10 with an adjustment screw 9 via a screw seat 8. The adjustment lever 14 has a fulcrum portion 14a hooked onto the body 11, and the other end 14-a hooked onto the body 11.
A cam 13 rotatably fixed by an E ring 12 to
is in contact with. The operating value of the damper thermostat is adjusted by adjusting the tension of the tension coil spring 7 by changing the screwing amount of the adjustment screw 9. Therefore, when the customer uses the damper thermostat as a cold room, the temperature can be adjusted by tilting the adjustment lever 14 in the direction of the arrow in FIG.
Rotate the cam 13 within a range where it does not come into contact with the abdomen 4' of the
This is done by changing the tension of the tension coil spring 7 by moving the adjustment lever 14. Therefore, when a customer uses the damper thermostat for a freezer compartment, he or she raises the adjustment lever 14 in the direction of the arrow in FIG.
The cam 13 is brought into contact with the lever C by the lever that contacts the abdomen 4' of the lever 4.
When the lever 4 is rotated, the lever 4 is forcibly rotated around the fulcrum 5, and the adjustment lever 1 is rotated without being affected by the bellows 2.
Regardless of the tension of the tension coil spring 7 due to the movement of 4,
As a result, the lever 4 is rotated regardless of the expansion or contraction of the bellows 2 due to temperature changes, and the damper attached to one end of the lever 4 is forcibly opened to the ventilation duct (not shown), thereby blowing out the cold air. It flows in without resistance, making it possible to use the cold room as a freezing room.

Effects of the Invention As stated above, the present invention has the other end of the adjustment lever cut into a protrusion, and when the adjustment lever is rotated, the protrusion comes into contact with the belly surface of the lever, causing the lever to The structure consists of an adjustment lever with a protrusion that operates regardless of the expansion and contraction of the bellows and forcibly opens the damper fully, so it can be used as a controller for the cold room installed in modern refrigerators and freezers. This is a damper thermostat with a forced full opening switch 414 that has the advantage of being able to be used as a dedicated controller for switching between the cold room and freezing room of refrigerators that have a cold room. , which is very useful in practical situations.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a damper thermostat showing an embodiment of the present invention, FIG. 2 is a perspective view of the main part of FIG. FIG. 4 is a sectional view of the damper thermostat according to the present invention during forced full-open operation, and FIG. 5 is a sectional view of a conventional example. 2...be-o-zu, 3-kawa...g-heat m, 4...
Lever, 6... Damper, 14...
Adjustment lever, 14-c... projection, 12 river... E-ring, 13... cam. Name of agent: Patent attorney Toshio Nakao 1 person 2-
-- Bellows 3- First, P! -, cylinder 4--- ν-6-da, par No. 1 Fig. 72-E
Su7g/j ---, 77K /4~-1 Death = Reno (- ni-C 2-m-Bellows 8- Yuretsuka/2--E-ring/3- Cam/4-- - Sword 1 arm r-reno (-? -m-herose', 3--be outer cylinder 4, --- ν) Fig. 4
6---- Damper / Z-E ring / 3- Cam / 4- Adjustment illumination / Bar liao-C---￥Super

Claims (1)

[Claims] A heat-sensitive part and bellows filled with refrigerant, a lever that transmits the displacement of the bellows by the expansion and contraction of the refrigerant gas in the heat-sensitive part, a damper that opens and closes when the lever rotates, and a damper that is attached to the lever and works to suppress the expansion of the bellows. A tension coil spring, an adjustment screw attached to the other end of the tension coil spring via a screw seat, an adjustment lever that fixes this adjustment screw, and a lever that slides in contact with one end of the adjustment lever to determine the amount of displacement of the tension coil spring. and a cam that changes the adjustment lever, and the other end of the adjustment lever is cut and raised into a protrusion, and when the adjustment lever rotates, it comes into contact with the lever, and the lever forcibly moves the damper to the fully open position regardless of the expansion and contraction movement of the bellows. A damper thermostat with a forced full opening mechanism consisting of a protrusion that allows the user to open the damper.