JPS6027903Y2 - Damper mechanism for refrigerators, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the arrangement and mechanism of a gas temperature regulator (damper) suitable for a refrigerator-freezer with a rear cold air duct system.

As shown in Fig. 1, a conventional refrigerator-freezer has a cold air passage 1 for cooling the refrigerator compartment in a partition 4 between a freezer compartment 2 and a refrigerator compartment 3, and a temperature controller (damper thermostat) 5 in the middle. The cold air cooled by the cooler 6 is blown into the freezer compartment 2 by the fan 7, discharged to the refrigerator compartment 3 through the cold air passage 1, cooled the refrigerator compartment 3, and then cooled by the suction cold air passage 8. The structure was to return to vessel 6.

FIG. 2 is a diagram showing the structure of the temperature regulator (damper thermo main body) 5. As shown in FIG.

A flapper 9 for opening and closing the cold air passage 1 is attached by a tension spring 10, and the temperature of the refrigerator compartment 3 is adjusted by opening and closing the flapper 9.

Reference numeral 11 designates a capillary tube installed at the entrance of the suction cold air passage 8 to suck in the cold air, detect the temperature of the cold air, change the pressure of the gas sealed in the capillary tube 11, convert it into mechanical operation by the bellows 12, and rod 13. The cold air is transmitted to the flapper 9, and the amount of cold air discharged is varied depending on the detected temperature.

Reference numeral 14 denotes a gas pressure adjustment gear, which changes the pressure of a spring (not shown) installed between the bellows 12 and the adjustment gear 14 by turning an engaged temperature adjustment dial 15, thereby changing the degree of expansion and contraction of the bellows 12. Adjust the set temperature in the refrigerator.

Further, 16 is a temperature compensation heater attached to the bellows 12 to prevent malfunction.

The present invention is to allow the temperature regulator of the above structure to be attached to the back of a refrigerator that has a freezer compartment and a refrigerator compartment integrally formed by simply changing the dial mounting structure without changing the main structure, and to easily adjust the dial. The present invention provides a damper mechanism that enables the following.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 3 and 4. Reference numeral 21 denotes a refrigerator-freezer, which has a freezer compartment 22 and a refrigerator compartment 23.

24 is a partition wall that partitions the cooler 25 and the freezer compartment 22, and is also provided with an opening corresponding to a cold air circulation fan 26.

Reference numeral 27 denotes a back cold air duct which is a cold air passage from the freezer compartment 22 to the refrigerator compartment 23, and a temperature regulator 28 is attached to the refrigerator compartment side at a place where a part of the upper rear wall is made thin.

29 is a suction cold air passage. FIG. 4 is a diagram showing the structure of the temperature regulator 28 of the present invention.

A support frame 31 supports a flapper 30 that opens and closes the rear duct 27.
The temperature of the refrigerator compartment 23 is adjusted by opening and closing the flapper 30.

Reference numeral 32 designates a capillary tube that detects the temperature of the refrigerating room, and the pressure of the sealed gas changes depending on the temperature, and a bellows 33 attached to the support frame 31 expands and contracts to open and close the flapper via a rod 34.

35 is a tension spring for opening the flapper.

36 is an adjustment gear, and a face gear 37 is pivotally connected to the support frame.
By engaging the bellows 33 and rotating the temperature adjustment dial 38 fixed to the shaft, the spring pressure of a compression spring (not shown) installed between the bellows 33 and the adjustment gear 36 is changed, and the degree of expansion and contraction of the bellows 33 is changed. to adjust the refrigerator compartment temperature setting.

Further, 39 is a temperature compensation heater attached to the bellows 33 to prevent malfunction.

Consisting of the above structure, when the temperature of the refrigerator room rises due to door opening/closing and heat radiation to the outside, the gas inside the capillary tube 32 swells, the bellows 33 is expanded, and the flapper 30 is rotated by the rod 34. The refrigerator compartment 23 is opened to discharge cold air into the refrigerator compartment 23.

When the inside of the refrigerator compartment 23 is cooled to an appropriate temperature, the gas in the capillary tube 32 contracts, causing the bellows 33 to contract and the rod 34 to be pulled back.

The flapper 30 closes due to the return force of the tension spring 35, blocking the cold air.

Also, to change the set temperature in the refrigerator, use the adjustment dial 38.
For example, when the adjustment gear 36 is turned from the standard notch to the strong notch, the adjustment gear 36 rotates in a direction that weakens the spring pressure of the compression spring installed between the bellows 33 and the bellows 33, making it easier to expand the flapper. Open 30 early.

When closing, the spring pressure is weakened, so the contraction speed of the bellows 33 is slowed down, and by closing the flapper 30 on a late day, the flapper opening time is extended to allow cooling.
The temperature set in the refrigerator will be set to a low temperature.

In addition, in the present invention, since the face gear that meshes with the spring pressure variable adjusting gear is provided so as to cover the body part 28a of the temperature regulator from the cold air side, the compensation heater 39 is The capacity can be reduced.

Furthermore, in the present invention, as shown in FIG. 4, the connection part (1) between the flapper 30 and the push rod 34 and the fulcrum part of the flapper are located away from the cold air passage, so these positions do not interfere with the freezing waist temperature adjustment. It is something that cannot be expected.

Also, a dial 38 attached to the face gear rotating shaft 37a.
The joint part with the shaft part 38a is located in the cold air passage, but since this part is covered with a heat insulating material 40, the face gear 37 is cooled through the rotation shaft 37a, and the body part 28a is not cooled. be.

As explained above, the present invention includes a mechanism that displaces the bellows by the expansion and contraction of the sealed gas and transmits the amount of displacement to the cold air amount adjustment flapper via a push rod, etc., and a mechanism that changes the amount of displacement of the bellows by adjusting a dial etc. In a temperature regulator having a mechanism equipped with a spring and an adjustment gear for varying the spring pressure, a face gear is engaged with the adjustment gear for varying the spring pressure, and the face gear adjusts the temperature. Since the body of the controller is covered from the cold air side, even if the cold air circulation path is changed to the rear duct system, by providing a face gear, it is possible to use the current gas-type temperature controller, making it cheaper. This allows it to be made thin so as not to reduce the effective volume of the refrigerator compartment.

In addition, the adjustment dial can be installed in a location that is easy to operate, and the adjustment angle is smaller than that of conventional adjustment dials, making it easier to operate.

Furthermore, the bellows part of the temperature regulator is installed in a place with thin insulation material, so heat from outside the refrigerator can be used, and the bellows part is surrounded by a face gear, etc., so a small capacity compensation heater can prevent malfunctions. This saves power, and the effect is significant.

[Brief explanation of drawings]

Figure 1 shows a conventional gas temperature controller (damper thermo)
Fig. 2 is a cross-sectional view of a refrigerator-freezer with a conventional gas-type temperature controller (damper thermo) installed.
Figure 3 is a cross-sectional view of a refrigerator-freezer equipped with the gas-type temperature regulator (damper thermo) of the present invention, and Figure 4 is a cross-sectional view showing the structure of the gas-type temperature regulator (damper thermo) of the present invention. be. 21...Fridge-freezer, 22...Freezing room, 23...Refrigerating room, 24...Partition wall,
25...Cooler, 26...Fan, 2
7... Rear duct, 28. Bench/temperature regulator (damper thermo), 29. Bench/cold air passage, 30...
・Flapper 31... Song support frame, 32... Capillary tube, 33... Bellows, 34...
...Tatsudo, 35...Tension spring, 36...
...Adjustment gear, 37...Face gear, 3
8...Adjustment dial, 39...Compensation heater, 40...Insulation material, 28a...
body.

Claims (1)

[Claims for Utility Model Registration] 1. The bellows is moved by the expansion and contraction of the sealed gas,
A mechanism that transmits the amount of displacement to the cold air amount adjustment flapper via a push rod, etc., and a mechanism that includes a spring and an adjustment gear for varying the spring pressure so that the amount of displacement of the bellows can be varied by adjusting a dial, etc. A damper for a refrigerator, etc., characterized in that a face gear is engaged with the adjustment gear for varying the spring pressure, and the face gear covers the body of the temperature regulator from the cold air side. mechanism. 2 Utility model registration claim No. 1 characterized in that a part of the body of the temperature controller is provided in the thin heat insulating part at the rear of the refrigerator compartment.
Damper mechanism for refrigerators, etc., as described in section. 3. A damper mechanism for a refrigerator, etc. as set forth in claim 1 of the utility model registration claim, characterized in that the fulcrum part of the flapper and the connection part with the push rod for adjusting the amount of cold air discharged in the refrigerator compartment are provided apart from the cold air passage.