JP2003083664A - Top panel duct opening/closing mechanism for cold storage room - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a top panel duct opening/closing mechanism for cold storage room that can maintain the inside of the cold storage room of a refrigerator, etc., at an appropriate cold temperature without causing any partial disturbance nor rupture in a cool curtain when the front door of the cold storage room is opened and, in addition, can prevent the occurrence of a supercooled state in the room when the front door is closed. SOLUTION: A damper 7 is provided in the top panel duct of the cold storage room. The damper 7 is provided with a lid body 8 which is opened and closed by means of a driving motor 9 and has a cold air communicating port 8b in the lower part of its central part. The lid body 8 is opened in an interlocking way with the front door of the cold storage room when the front door is opened and the opened duration of the body 8 is set longer than that of the front door. Consequently, when the front door is closed, a weak cool curtain is formed only of cold air passing through the cold air communication port 8a. When the front door is opened, on the contrary, a strong cool curtain is formed of a large quantity of cold air passing through the damper 7.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a refrigerator or a freezer.
The present invention relates to a mechanism for opening and closing a ceiling duct of a refrigerator compartment in a refrigerator.

[0002]

2. Description of the Related Art In a refrigerating room such as a refrigerator, cold air cooled by a refrigerant usually passes through a duct 1 formed on the back side of a back wall as shown in FIG. Cold air is blown into the refrigerating room from 2 to exert a cooling function. A ceiling duct 3 is provided in the upper part of the refrigerating chamber so as to communicate with the duct 1, and cool air is blown downward from a grill 4 provided at a front end portion of the ceiling duct 3. This downward cold air flow is a cool curtain (air curtain)
Exert its function as. Reference numeral 5 is a fan provided in the duct 1.

In the ceiling duct 3, the weir A is provided in the middle as shown in FIG. 7, and a notch B is formed at the center of the weir A so that the amount of cold air flowing to the grill 4 side can be adjusted. I have to. Since the cutout portion B of the weir A is set to have a constant width, a substantially constant cold airflow always passes therethrough, so that the cool curtain blown out from the grill 4 also has a substantially constant flow rate state.

[0004]

In the above-mentioned conventional refrigerator or the like, when the front door 6 (FIG. 6) of the refrigerating compartment is opened, the warm air entering from the outside is blocked by the cool curtain and the cool air escapes to the outside. Although the inside of the refrigerating room is kept at an appropriate cold temperature by blocking the above, there is a case where a part of the cool curtain is disturbed or broken and warm air enters into the inside of the refrigerating room to raise the temperature inside the refrigerating room. In order to prevent this, for example, the cool airflow of the cool curtain is increased so that the cool curtain is not disturbed or broken when the front door 6 is opened. However, in that case, even when the front door 6 is closed, the cool curtain in which the cold air flow has increased continues to flow, so that the temperature inside the refrigerating room becomes too cold (supercooling) and vegetables are frozen. A bad situation occurs.

The present invention has been made in order to solve such a conventional inconvenience, and when the front door of the refrigerating compartment is opened, the cool curtain is not disturbed or broken and the inside is kept at an appropriate cold temperature, and the front surface is kept. An object is to provide a ceiling duct opening / closing mechanism for a refrigerating room, which prevents a supercooled state from occurring when the door is closed.

[0006]

As a technical means for achieving the above object, the present invention provides a damper in association with a ceiling duct disposed above a refrigerating compartment in a refrigerator or the like. The gist of the present invention is a ceiling duct opening / closing mechanism of a refrigerating room, characterized in that a lid body having a cold air circulation port is formed to be openable / closable. Further, in this ceiling duct opening / closing mechanism of the refrigerating compartment, the lid body is opened in association with the opening of the front door of the refrigerating compartment, and is closed corresponding to the opening time of the front door. Is that it is set to be equal to or longer than the opening time of the front door.

According to the present invention, when the lid of the damper provided in relation to the ceiling duct is closed, an appropriate amount of cold air is supplied through the cold air circulation port, and when the lid is opened, a large amount of cold air is supplied. Supplied. That is, the lid opens in conjunction with the opening of the front door of the refrigerating room, and when the front door is opened, the flow of the cool curtain is strengthened to prevent warm air from entering from the outside to keep the inside of the refrigerating room at an appropriate cold temperature. be able to. Also, the opening time of the lid body is set to be equal to or longer than the opening time of the front door in consideration of the opening time of the front door, so that the front door is closed and closed at the same time, or even after the front door is closed. By keeping the open state for a certain period of time and then closing it, cold air is supplied only from the cool air flow port of the lid to weaken the flow of the cool curtain and prevent overcooling of the refrigerating chamber.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a ceiling duct opening / closing mechanism according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a top surface duct 3 of a refrigerator or a refrigerator in a freezer / refrigerator.
FIG. 6 shows a damper 7 provided inside (see FIG. 6). An openable / closable lid 8 is attached to the central portion, and a cold air circulation port 8a of a predetermined size is formed in the lower central portion of the lid 8. ing. The damper 7 is preferably attached at the same position as the conventional weir A.

The lid 8 has a shaft rod 8b at the upper ends of both sides.
(FIG. 3) are provided so as to extend horizontally, and the tips of the shaft rods 8b are rotatably supported by bearings 7b formed on the frame 7a of the damper 7, respectively.

Reference numeral 9 is a drive motor such as a pulse motor,
The damper 7 is supported by the end portion of the frame 7a, and the lid 8 can be rotated by a predetermined angle to open and close. The lid 8 is opened and closed in consideration of the opening and closing of the front door 6 of the refrigerator compartment. That is, when the front door 6 is opened, the lid body 8 opens in conjunction with it, and the front door 6 is closed and the lid body 8 is closed at the same time, or even after the front door 6 is closed, the lid body 8 is opened for a certain time. Set to close after the state continues.
In the latter case, for example, the opening time of the lid body 8 is about twice the opening time of the front door 6. Although illustration is omitted, the opening of the front door 6 is detected by a sensor, the opening time of the front door 6 is measured by a timer, and these detection signals are input to the control device.
The drive motor 9 for the lid 8 is controlled by a command signal from the control device.

The damper 7 constructed as described above is attached to the inner portion of the ceiling duct 3 as described above, and the lid 8 is positioned to face the grill 4 at the tip. When the front door 6 of the refrigerating compartment is closed, the lid 8 of the damper 7 is in a closed state, and the cold air flowing from the duct 1 into the ceiling duct 3 is cooled by the cold air flow port 8a of the lid 8. And blows downward from the grill 4 and functions as a cool curtain that shields the front opening of the refrigerator compartment.

The cool curtain is continuously formed even when the front door 6 is closed so that the temperature in the refrigerating room can be kept at an appropriate temperature together with the cool air supplied from the outlet 2 formed on the back wall of the refrigerating room. There is. At this time, the size of the cold air circulation port 8a of the lid 8 is set so that the temperature in the refrigerating chamber does not become too low and is not overcooled.

Cool airflow and outlet 2 of the cool curtain
The cold air supplied from the bottom duct 1 from the return port 10 (FIG. 6) provided at the bottom of the refrigerating chamber after performing the cooling action.
1 and is returned to the duct 1. The recirculated return cool air is cooled again by heat exchange with a refrigerant pipe (not shown) and reused (circulated use).

When the front door 6 of the refrigerating compartment is opened, the lid 8 of the damper 7 is interlocked and opened as shown in FIGS. 4 and 5, and the amount of cold air passing through the damper 7 increases. As a result, the cool air flow of the cool curtain can be increased, and the disturbance or breakage of the cool curtain due to the opening of the door can be prevented to prevent the entry of warm air from the outside. Since the opening time of the lid body 8 is set longer than that in consideration of the opening time of the front door 6 as described above, it is possible to sufficiently deal with the opening time of the front door 6. Therefore, when the front door 6 is opened, it is possible to prevent the temperature inside the refrigerating chamber from rising and to keep it at an appropriate cold temperature.

The lid 8 of the damper 7 is in a substantially horizontal state with respect to the ceiling duct 3 and is fully opened. However, it is also possible to regulate the rotation angle of the lid 8 and set the opening angle appropriately. . The size (particularly the width dimension) and the opening angle of the lid body 8 can be appropriately set according to the volume of the refrigerating chamber, that is, the cool airflow of the cool curtain when the door is opened is taken into consideration in consideration of the volume of the refrigerating chamber. Design the right amount.

After the lid 8 is closed again, a cool curtain is formed only by the cold air that has passed through the cold air flow port 8a as shown in FIGS. This cool curtain is continuously formed while the front door 6 is closed as described above.

[0017]

As described above, according to the present invention, in a refrigerating room such as a refrigerator, a damper is provided in a ceiling duct, and this damper is formed so that a lid having a cold air flow port can be opened and closed. When the front door of the refrigerating room is closed, the lid is closed to pass through the cold air circulation port to form a weak cool curtain, and when the front door is opened, the lid is opened and a large amount of air is passed. A strong cool curtain can be formed by the cold air. The opening time of the lid body is set in consideration of the opening time of the front door. As a result, when the front door of the refrigerating room is opened, the inside of the cool curtain is kept at an appropriate cooling temperature without being disturbed or broken, and when the front door is closed, an overcooled state occurs inside. It has an excellent effect that it does not exist.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a ceiling duct opening / closing mechanism of a refrigerating compartment according to the present invention.

FIG. 2 is a perspective view showing a state of the damper when the front door of the refrigerating compartment is closed.

FIG. 3 is a schematic sectional view of the same.

FIG. 4 is a perspective view showing a state of the damper when the front door of the refrigerator compartment is opened.

FIG. 5 is a schematic perspective view of the same.

FIG. 6 is a schematic sectional view showing an example of a freezer / refrigerator.

FIG. 7 is an exploded perspective view showing a conventional example.

[Explanation of symbols]

1 ... Duct 2 ... Blowout 3 ... Top duct 4 ... Grill 5 ... fan 6 ... Front door 7 ... Damper 8 ... Lid 8a ... Cold air flow port 9 ... Drive motor 10 ... Return port 11 ... Bottom duct

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Junichi Nunodome             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Kyoya Tateno             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Motoyuki Murasha             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Nishi Hiroshi             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Emi Nojima             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd.

Claims (3)

[Claims] 1. A damper is provided in association with a ceiling duct disposed above a refrigerating compartment in a refrigerator or the like, and the damper has a lid body having a cold air flow port that can be opened and closed. Top and bottom duct opening and closing mechanism of the refrigerator compartment. 2. The ceiling duct opening / closing mechanism for a refrigerating compartment according to claim 1, wherein the lid is opened in association with the opening of the front door of the refrigerating compartment and is closed corresponding to the opening time of the front door. 3. The ceiling duct opening / closing mechanism for a refrigerating room according to claim 1, wherein the opening time of the lid is set to be equal to or longer than the opening time of the front door.