JPS6237584A - 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 providing an auxiliary cam mechanism adapted to bring one of a lever into contact with one end of a cam and slide same, so that the lever is operated regardless of expansion and contraction of a bellows to forcedly full open a damper. CONSTITUTION:A damper 6 is fixed to a lever 15 having a supporting point 16 and a coiled spring 7 for applying force to hold down expansion and contraction of a bellows 2 is fixed to the lever. The damper 6 is forced to move the lever 15 to be open by an auxiliary cam 14 brought into contact with the horizontal surface 15'' of the lever 15. When a damper thermostat is for a refrigerating chamber, a cam 13 is rotated to bring the auxiliary cam 14 into contact with the lever 15, so that the lever 15 is turned to open the damper 16. Thus, as a controller, a damper thermostat for a low temperature chamber can be switched to a damper thermostat for the refrigerating chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a refrigerator-freezer which is used for temperature adjustment of the cold room of a refrigerator-freezer having a cold room, and has a structure in which the cold room can be switched to a freezing room. This invention relates to a damper thermostat with a forced full opening mechanism, which is a special controller for switching between cold and freezing rooms.

Prior Art A conventional damper thermostat will be explained with reference to FIG. The lever 4 rotates around a fulcrum 5 attached to a body 11 due to the expansion and contraction of the refrigerant gas sealed in the sealed container of the bellows 2 attached to the bottom plate 1 and the heat sensitive part 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, and a tension coil spring 7 is hooked onto the hook portion 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 1o hooks the fulcrum part 10-b onto the body 11,
Body 1 in a position where the other end 10-a faces the bottom plate 1
A cam 13 rotatably fixed to 1 by an E ring 12
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. Further, temperature adjustment by the customer is performed by rotating the cam 13, moving the adjustment lever 10, and changing the tension of the tension coil spring 7. The damper thermostat with the above structure can be used only for cold rooms or refrigerator rooms, even if the temperature is adjusted.
On the other hand, when switching from a freezing room to a cold room, it is impossible to fully open the damper without being affected by the bellows, making it suitable for controllers for multi-purpose freezers and refrigerators, which is a customer need these days. It wasn't.

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 thermostat described in the conventional example, it is impossible to switch between a low temperature room at around -3°C and a freezer room at around -20°C, and the damper thermostat cannot meet the needs of customers.

Means for Solving the Problems The present invention provides a heat-sensitive section 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 rotating the lever, and a lever. A tension coil spring that is attached to the spring and works in the direction of suppressing the expansion of the bellows, an adjustment screw that is attached to the other end of the tension coil spring through a screw seat, an adjustment lever that fixes this adjustment screw, and one end of the adjustment lever that a cam that slides in contact with and changes the amount of displacement of the tension coil spring; a cam that is attached to one end of the cam and that slides in contact with one end of the lever;
operating the lever regardless of the expansion/contraction movement of the bellows;
The damper is configured with an auxiliary cam mechanism that fully opens the damper, and can be used normally as a controller for a cold room, and by forcing the damper 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 thermotact to a low temperature room, the heat-sensitive part filled with a refrigerant and the closed container of the bellows, and the lever that transmits the displacement of the bellows by expansion and contraction of the refrigerant gas are provided. The amount of cold air can be adjusted using a damper that opens and closes by rotating a lever. In addition, when switching from a low-temperature room to a freezing room in the same room, the cam of the damper thermostand of the present invention is turned and the auxiliary cam attached to one end of the cam slides into contact with one end of the lever. Then, the lever is operated regardless of the expansion/contraction movement of the bellows, and the damper is forcibly fully opened.

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

The explanation will be made using FIG. 5, but the same components as the conventional ones are denoted by the same numerals, and detailed explanation thereof will be omitted.

Reference numeral 15 in FIG.
6, and a damper 6 is attached to one end of the lever. The other end of the lever 15 is bent into an abbreviated shape, and the first bent portion is hook-shaped.
’.

One end of a tension coil spring 7, which exerts a force in a direction to suppress expansion and contraction of the bellows 2, is hooked and attached to this hook 15'. 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.

An auxiliary cam 14 is attached to one end of the cam 13 to which the E-ring 12 is attached, and is fixed to a pin 17, which abuts the tip of the horizontal surface 15'' of the bent portion of the lever 4.

When this horizontal surface 15'' comes into contact with the auxiliary cam 14, the lever 15 of the damper 6 is forcibly moved and the damper 6 is brought into an open state.

Next, to explain the operation, when a temperature change occurs in the heat-sensitive tube 3, the internal gas pressure changes, so the bellows 2
rt'i, the lever 15 rotates around the fulcrum 16 by performing an expansion and contraction operation. 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 onto the hook part of the lever 15, and the other end is fixed to the adjustment lever 10 (through the screw seat 8 with an adjustment screw 9.
10 hooks the fulcrum part 10-b onto the body 11, and the other end 1
0-a is in contact with a cam 13 which is rotatably fixed to the body 11 by an E-ring 12.

The operating value of the damper thermo 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 for a cold room, the temperature adjustment is done by using the cam 13 as the second
By rotating the adjustment lever 10 clockwise as shown in the figure, the adjustment lever 10 is moved and the tension of the tension coil spring 7 is changed. Also, when the customer uses the damper thermostand for a freezer compartment, by rotating the cam 13 counterclockwise as shown in FIG. The auxiliary cam 14 is
When the cam 13 is rotated counterclockwise until it comes into contact with the vertically bent portion of the lever, the auxiliary cam 1
4, the lever 15 is forcibly rotated around the fulcrum 16, regardless of the tension of the tension coil spring 7 due to the movement of the adjustment lever 10, and even the expansion and contraction of the bellows 2 due to temperature changes in the temperature sensing tube 3. Regardless, the lever 15 is rotated and the damper attached to one end of the lever 15 is forcibly opened to the ventilation duct (not shown), allowing cold air to flow in without resistance, allowing the cold room to be used as a freezing room. becomes.

Effects of the Invention As described above, the present invention is attached to one end of the cam,
The structure consists of an auxiliary cam 14 that slides in contact with one end of the lever, operates the lever regardless of the expansion and contraction movement of the bellows, and forcibly opens the damper fully, which improves the performance of the low temperature chambers installed in modern refrigerators. Not only can it be used as a controller, but it also makes it possible to switch from a low-temperature room to a freezing room at around -20'C. As described above, this damper thermostat with a forced full opening mechanism has the advantage that it can be used as a dedicated controller for switching between a cold room and a freezing room in a refrigerator in which a cold room is installed, and is very useful in practice.

[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 sectional view of the damper thermostat shown in Fig. 1 during normal operation, and Fig. 3 is a perspective view of the main parts of Fig. 2. , FIG. 4 is a cross-sectional view of the damper thermostat according to the present invention during forced full-open operation, FIG. 6 is a perspective view of the main part of FIG. 4, and FIG. 6 is a cross-sectional view of a conventional damper thermostand. 2...Bellows, 3...Heat-sensitive fm, 15
...Lever, 6...Damper, 10.
...Adjustment lever, 12...E ring, 13
...'° cam, 14... Auxiliary cam. Name of agent: Patent attorney Toshio Nakao and 1 other person2-
Bellows 3--One temperature tube No. 1 Figure 6-Damper/θ-m=Adjustment lever/Z-E ring/, 3-71mm2---Bellows. 3-11 Comfort Warm 6--- Gunhe- /3- Sword Mu○ /4...- Sun Nori η Mu Figure 3
○ Figure 6/, 3 Ll')
) Mound

Claims (1)

[Claims] A heat-sensitive part filled with refrigerant, a bellows, a lever that transmits the displacement of the bellows by expansion and contraction of the refrigerant gas in the heat-sensitive part, a damper that opens and closes by rotating the lever, and a damper that is attached to the lever and moves in the direction of suppressing the expansion of the bellows. A working 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 mechanism that slides in contact with the adjustment lever to change the amount of displacement of the tension coil spring. A damper with a forced full opening mechanism consisting of a cam and an auxiliary cam mechanism that is attached to one end of the cam, slides into contact with one end of the lever, operates the lever regardless of the expansion/contraction movement of the bellows, and forces the damper to fully open. thermostat.