JPH04306476A - Damper opening and closing device - Google Patents

Abstract

PURPOSE:To provide a damper opening and closing device, having a thin total thickness and controllable two or many chambers easily, in the damper opening and closing device controlling the inside temperature of a refrigerator or the like. CONSTITUTION:A rotor 27, rotated by a driving source 22 or a unit motor, is provided in the cylindrical space 18 of a housing 16, in which a cold air inlet port 19 and cold air outlet ports 20, 21 are arranged on the same circumference, while a detecting means 32, detecting the position of the rotor, is provided. A seal form 30, bonded on said rotor 27, is contacted with seal members 35a, 35b, 35c attached to the cold air inlet port 19 and the cold air outlet ports 20, 21 whereby a damper can be opened and/or closed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper opening/closing device for controlling the temperature inside a refrigerator or the like by controlling the amount of cold air discharged from a discharge port.

0002

[Prior Art] In recent years, damper opening/closing devices have been used to improve temperature control inside refrigerators, and because there is a strong tendency for refrigerators to have multiple compartments due to diversification of internal temperatures. In place of the type damper opening/closing device, a device in which a damper is opened and closed by a motor has been proposed, as shown in, for example, Japanese Utility Model Application No. 61-23673. but,
The increase in the number of damper opening/closing devices due to the multi-chamber design reduces the effective internal volume of the refrigerator as well as securing the air passages, leading to an increase in the cost of the refrigerator as a whole. Therefore, as shown in Japanese Unexamined Patent Publication No. 62-24084, a system has been proposed in which multiple rooms are controlled by one motor.

A conventional damper opening/closing device will be explained below. 6 and 7 show the configuration of a conventional damper opening/closing device, and FIG. 8 shows the movement of the cam and the opening/closing state of the opening/closing plate of the conventional damper opening/closing device. 6 and 7, reference numerals 1 and 2 are opening/closing plates, which are provided between a cold air outlet (not shown) and a chamber to be controlled, and which rotate around fulcrums 4 and 5 provided in the case 3, respectively. It can be installed freely. A spring 6 always urges the opening/closing plates 1, 2 in the closing direction.

There is a single motor 7 on the back side of the opening/closing plates 1, 2, and a motor output gear 8 and a second gear 9 are connected between the single motor 7 and the opening/closing plates 1, 2. two eccentric cams 1 fixed to a shaft 10 integral with the second gear 9;
1 and 12. Reference numerals 13 and 14 indicate driven pins, which are provided at positions where they come into contact with the eccentric cams 11 and 12. The driven pins 13 and 14 pass through through holes 15 provided in the case 3 and are connected to the opening and closing plates 1 and 2.

The operation of the damper opening/closing device constructed as described above will be explained below. First, when the motor 7 is driven by a signal, the motor output giga 8 and the second
Eccentric cams 11 and 12 rotate via gear 9.

Depending on the degree of displacement of the outer periphery of the eccentric cams 11, 12, the opening/closing plates 1, 2 open and close, respectively, via the driven pins 13, 14, and as shown in FIG.
rotation is stopped every 90°, and the two opening/closing plates 1 and 2 are in four modes in the order of close-close, close-open, open-open, and open-close.

Therefore, the two opening/closing plates 1 and 2 are operated by a single motor 7.
This allows the two chambers to be controlled independently, eliminating the need to install a damper opening/closing device for each chamber.

[0008]

[Problems to be Solved by the Invention] However, in the above conventional configuration, the opening/closing plate 1 is mounted on the motor 7 which is the drive source 7.
, 2 and the driven pin 1.
3 and 14, and is provided with an opening/closing plate that opens and closes up and down, the overall thickness is thick, and when attached to a refrigerator, there is a problem that the effective internal volume becomes small. Another problem was that the structure was complicated in order to control two or more rooms.

The present invention solves the above-mentioned conventional problems, and aims to provide a damper opening/closing device that is thin and can easily handle control of two or more rooms with a single drive source. do.

0010

[Means for Solving the Problems] To achieve this object, the damper opening/closing device of the present invention includes a cold air inlet communicating with a cold air inlet, and a plurality of cold air outlets communicating with the cold air inlet and each chamber. a housing in which the cold air inlet and the cold air outlet are arranged on the same circumference; a seal member attached to the cold air inlet and the plurality of cold air outlet parts of the housing; and a seal member fixed to the seal member. a rotor having a sealing form that can be opened and closed by fitting into a sealing member of the cold air inlet or the cold air outlet rotatably provided in the center of the housing; and a drive source for rotating the rotor. , a detecting means for detecting the position of the rotor and controlling the rotor to stop at each cold air inlet portion and cold air outlet portion.

[0011]

[Operation] With this configuration, the rotor can be stopped at each cold air inlet and a plurality of cold air outlets, and at the stopped position, the inlet or outlet is connected to the sealing member provided in the housing and the tip of the rotor. The provided seal portion can abut and close.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 5, 16 is a housing;
It has a box shape and has a cylindrical protrusion 17 in the center, and consists of frame parts 16a, 16b, and 16c provided around the cylindrical protrusion 17 with an annular space 18 interposed therebetween. A cold air inlet 19 is formed between the frame parts 16a and 16b, and communicates with a cold air inlet (not shown) of the refrigerator. Frame portions 16b and 16c each differing by 90 degrees from the cold air inlet portion 19.
A cold air outlet portion 20 communicating with the chamber is formed between the frame portion 16 and the cold air outlet portion 20 communicating with the chamber.
A cold air outlet portion 21 communicating with the chamber is formed between a and 16c.

The outlet portions 20, 21 and the inlet portion 19 communicate with each other via the annular space 18 and are arranged on the same circumference.

The cylindrical projection 17 is hollow, and in this hollow part there is one motor as a drive source 22 and its output gear 23, and this output gear 23 is a group of reduction gears held on a disk 24. It meshes with 25.

The final stage gear 26 of this reduction gear group 25 protrudes from the hole 17a of the cylindrical projection 17. A rotor 27 has a cylindrical shape so as to fit around the outer periphery of the cylindrical projection 17, and is supported by a shaft so as to be rotatable. Reference numeral 28 denotes a blade portion which extends in the radial direction of the rotor 27 and is provided so as to be rotatable within the cylindrical space 18 of the housing 16 as the rotor 27 rotates.

A gear 29 is rotatably supported on the cylindrical protrusion 17 by a shaft 29a within the rotor 27, and meshes with the final stage gear 26 of the reduction gear group 25, so that the rotor 27 can be rotated. There is.

Numeral 30 is a sealing foam which is attached to the blade portion 28 of the rotor 27 at equal intervals with a dimensional difference from the cold air inlet portion 19 and outlet portions 20, 21 of the housing 16. 31 is a magnet that connects the blade portion 2 of the rotor 27.
8, and on the bottom surface 16d of the cold air inlet portion 19 of the housing 16, there is a detection means 32 for detecting the position of the rotor 27 in correspondence with the magnet 31.
A reed switch is embedded.

This reed switch 32 is connected to an external control circuit (
(not shown). A cover 33 that covers the housing 16 and forms one corner of the cold air inlet section 19 and the cold air outlet sections 20 and 21 is attached to the top side of the housing 16 with screws 34.

The cold air inlet part 19 and the cold air outlet parts 20 and 21 formed by the housing 16 and the cover 33 have side surfaces 19a and 20a of the cold air inlet part 19 and the cold air outlet parts 20 and 21, respectively, in the direction toward the center. , 21a, a part of the entire circumference is exposed in the cylindrical space 18 of the housing 16, and a relatively thin seal member 35a, 35b contacts the seal form 30 attached to the tip of the rotor 27.
35c is installed.

Reference numerals 36a, 36b, and 36c are locks for fixing the seal members 35a, 35b, and 35c, respectively. cold air inlet section 19 and cold air outlet section 20,
21 so as to be in close contact with the entire circumference of the side surfaces 19a, 20a, 21a, and are fixed with screws 37.

The operation of the damper opening/closing device constructed as described above will be explained with reference to FIGS. 1 to 5. First, when a signal is input from a control circuit (not shown), the motor 22 rotates, and is passed through a reduction gear group 25 to a final output stage gear 26.
Rotation is transmitted from the rotor 27 to the rotor 27. The rotor 27, the blade portion 26, and the seal form 30 rotate within the annular space 18 of the housing 16.

Here, the origin of the rotational position of the rotor 27 is determined by the sensor embedded in the housing 16 when the seal foam 30 of the rotor 27 comes into contact with the entire circumference of the seal member 35a and closes the inlet portion 19 of the housing 16. It can be detected by turning on the reed switch as means 32 and inputting it to the external control circuit.

[0024] Here, assuming that the outlet section 20 communicates with the first chamber and the outlet section 21 communicates with the second chamber, both chambers:
When the temperature is low, the sealing foam 30 of the rotor 27 closes to the sealing member 3 incorporated in the inlet portion 19 of the housing 16.
5a and stops at a position where the inlet portion 19 is closed, thereby stopping cold air from flowing in from the discharge port (see FIG. 2).

Further, when the temperature of only the second chamber is high and the temperature of the first chamber is low, the motor 22 is energized for a certain period of time so that the rotor 27 rotates by 90° from the state shown in FIG. 20 (see Figure 3).

[0026] Also, when the temperature of both chambers is high and you want to cool them,
The motor 22 is energized so that the rotor 27 rotates by 90 degrees from the state shown in FIG. 3 (see FIG. 4). Similarly, if you want to cool only the first chamber, just rotate it by 90 degrees from FIG. 4 (see FIG. 5).

As described above, according to this embodiment, the cold air inlet portion 19 communicating with the cold air inlet and the two outlet portions 20 and 21 communicating with the inlet portion 19 are provided on the same circumference rotated by 90°. , a rotatable rotor 27 and a seal form 30 for opening and closing the inlet section 19, outlet sections 20, 21, and a reed switch 32 for detecting the rotor position are provided, and a control circuit controls the respective inlet section 19, outlet section 20, Since it is possible to stop the sealing foam 30 attached to the rotor 27 on the entire circumference of the sealing members 35a, 35b, and 35c incorporated in the rotor 21, it is possible to stop the sealing foam 30 in contact with the entire circumference of the sealing members 35a, 35b, and 35c incorporated in the rotor 21. It is possible to provide a damper opening/closing device that requires only one motor, is thin, and has a simple structure.

[0028]

As described above, the present invention includes a rotor rotated by a drive source and a detection means for detecting the rotor position, and further stops the rotor at each cold air inlet and cold air outlet. Since the inlet and outlet sections can be opened and closed by the seal foam attached to the inlet and the sealing members provided at the inlet and outlet sections, it is easy to control two or multiple chambers. The overall thickness is thin, and when installed in a refrigerator, the effective internal volume of the refrigerator can be utilized widely, resulting in a compact and efficient damper opening/closing device.

[Brief explanation of drawings]

[Fig. 1] An exploded perspective view of a damper opening/closing device in an embodiment of the present invention.

[Figure 2] Plan view of main parts when the damper opening/closing device in Figure 1 closes the inlet section

[Figure 3] The damper opening/closing device in Figure 1 is at the outlet (second chamber side)
Main part plan view when closed

[Fig. 4] A plan view of main parts showing the damper opening/closing device in Fig. 1 in a fully open state.

[Figure 5] The damper opening/closing device in Figure 1 is at the outlet (first chamber side)
Main part plan view when closed

[Figure 6] Cross-sectional view of main parts of a conventional damper opening/closing device

[Figure 7]
Cross-sectional view taken along line A-A of the damper opening/closing device in Figure 6

[Fig. 8] An explanatory diagram showing the movement of the cam and the opening/closing state of the opening/closing plate of the damper opening/closing device in Figure 6.

[Explanation of symbols]

16 Housing 33 Cover 19 Cold air inlet section 20, 21 Cold air outlet 22 Drive source 27 Rotor 30 Seal form 32 Detection means

Claims (1)

[Claims] [Claim 1] A cold air inlet communicating with a cold air inlet;
A housing in which the inlet portion and a plurality of cold air outlet portions communicating with each chamber are arranged on the same circumference, a cover that fits the housing to form a space inside the housing, and the housing and the cover. a relatively thin sealing member that fits around the entire side surface of the formed cold air inlet and the plurality of cold air outlets, and a part of the entire periphery is exposed in the space of the housing; and a locking member that fixes the sealing member; A rotor having a seal form that is rotatably provided in the center of the housing and that can be opened and closed by contacting a relatively thin seal member whose entire circumference is partially exposed in the space from the cold air inlet or the cold air outlet. A damper opening/closing device comprising: a drive source for rotating the rotor; and a detection means for detecting the position of the rotor and controlling the rotor to stop at each cold air inlet and cold air outlet.