JP2005257209A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator for reducing power consumption by radiating heat of an overheated part such as a storage inside lamp and reducing a heat effect to a periphery and a room by reversely rotating a fan for forming an air curtain when a door is opened at a predetermined time or when the door is closed. <P>SOLUTION: The refrigerator comprises a storage chamber 5 formed in a heat insulated casing, the door for closing a front surface opening part of the storage chamber so as to freely open and close, a cold air duct 20 and the storage inside lamp 19 arranged on a ceiling part of the storage chamber, and the fan 23 closing to the storage inside lamp and provided in an upper front of an inside of the storage chamber. When the door is opened, the fan is driven to flow cold air downward by forming an air curtain . When a predetermined time passes after the door is opened, a rotation direction of the fan is reversed to blow to the storage inside lamp part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a refrigerator, and more particularly, to a refrigerator in which a fan for forming an air curtain is provided on an upper front surface of an opening of a storage room.

  In recent years, in a storage room having a large cooling space such as a refrigerator room in a refrigerator, in order to prevent intrusion of outside air through the opening and closing door, when the door is opened, cold air flows down from the upper part of the storage room in the width direction, so-called air curtain Some of them are designed to save power.

This air curtain forms a cool air curtain at the front opening of the storage room by driving a fan when the door is opened, and prevents high temperature outside air from entering the storage room by opening the door. The cooling air is prevented from flowing out to keep the indoor cooling temperature (for example, see Patent Document 1).
JP 2003-106756 A

  However, on the other hand, in a storage room having a large storage capacity such as the refrigerator room, there are many configurations in which an interior lamp that illuminates the room when the door is opened is arranged on the upper surface of the front part of the storage room. There is a problem that the temperature of the indoor cooling space rises due to the heat of the interior lamp or the wall surface of the storage room near the interior lamp is thermally deformed.

  In particular, when exhibiting a refrigerator at a storefront and demonstrating the air curtain mechanism or the like, the door opening time becomes longer and the lighting time of the interior lamp becomes longer. In addition, when the temperature of the drive unit such as a fan motor is overheated and the ambient atmosphere is hot and humid, the fan motor control unit is condensed due to intrusion warm air during the opening of the door. There was also a problem that the control board malfunctioned due to frost formation.

  The present invention has been made in consideration of the above points. By rotating the fan that forms the air curtain at the time of opening the door at a predetermined time or at the time of closing the door, heat is dissipated from an overheated portion such as an interior lamp, and the surroundings and the room can be radiated. An object of the present invention is to provide a refrigerator that can reduce the power consumption by eliminating the influence of heat.

  In order to solve the above-mentioned problems, a refrigerator according to the invention described in claim 1 includes a storage room formed in a heat-insulating housing, a door for opening and closing a front opening of the storage room, and a ceiling part of the storage room. A cool air duct and an interior lamp disposed in the interior of the storage room, and a fan provided in front of the interior of the storage room in the vicinity of the interior lamp. The fan is driven when the door is opened to cool the air in the form of an air curtain. Then, when the door is closed again, the fan is rotated in the reverse direction to blow air to the interior lamp section.

  Further, the refrigerator according to claim 2 is a storage room formed in the heat insulating casing, a door for closing the front opening of the storage room so as to be openable and closable, and a cold air duct and a cabinet disposed on the ceiling of the storage room. It consists of an inner lamp and a fan provided in front of the upper part in the storage chamber in the vicinity of the inner lamp, and this fan is driven when the door is opened to cool down the air in the form of an air curtain, When a predetermined time has elapsed after the door is opened, the fan is rotated in the reverse direction so as to blow air to the interior lamp unit.

  According to the invention of claim 1, when the air curtain action prevents heat leakage at the time of opening the door and saves power, and when the opening time of the door becomes long and the interior lamp is overheated. Can forcibly cool the overheated part at the same time as the door is closed, and can prevent dangers such as thermal deformation due to overheating and malfunction due to condensation.

  According to the invention of claim 2, when the opening time becomes longer than the predetermined time, the overheated portion such as the interior lamp is effectively cooled by rotating the fan in reverse while the door is opened. It is something that can be done.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The refrigerator main body (1) which shows the longitudinal cross-sectional view in FIG. 1 includes an outer box (2) that forms an outer shell, and an inner box (3) that forms the inner wall surface of a storage room via an insulating space inside the refrigerator. In the heat insulating space, a heat insulating box is formed by foam filling by a so-called in-situ foaming method in which a stock solution of a heat insulating material (4) such as urethane foam is directly injected into the heat insulating space.

  The inside of the inner box (3) has a refrigeration room (5) at the top as a storage space, a vegetable room (6) below it, and an ice storage room (7) via a heat insulating partition wall below the vegetable room. The temperature switching chamber is divided into the left and right side, the freezer compartment (8) is arranged independently at the bottom, and a dedicated door (9) is provided at the front opening of each storage compartment. Closed to open and close.

  Each storage chamber is closed by providing a dedicated opening / closing door at the front opening thereof, and a refrigeration cooler (10), a refrigeration cooler (11), Cooling air is circulated by cooling fans (12), (13) and ducts (15) provided in the vicinity of each cooler, and cooling is controlled to a temperature set for each storage room.

  A machine room (16) is formed in the lower rear part of the freezing space arranged at the lowermost part of the refrigerator main body (1), and supplies refrigerant to the refrigeration and freezing coolers (10) (11). A compressor (17) is installed.

  In the above configuration, a storage space for stored items is formed by providing a plurality of stages of shelves (18) in the refrigerator compartment (5) having the largest storage volume, and the refrigerator compartment is provided on the ceiling. There is an interior light (19) to illuminate.

  As shown in FIG. 2, which is a detailed cross-sectional view of the main part, the interior lamp (19) is disposed on the ceiling of the synthetic resin inner box (3) by vacuum molding, 10) and the cooling fan (12) are housed and installed in a housing recess (21) that is recessed from the duct (15) leading to the refrigeration space toward the ceiling surface duct (20).

  The storage recess (21) holds the cool air circulation space in the ceiling duct (20) and has a space that can substantially store the assembly of the interior lamp (19) and the interior lamp socket. It is formed in a container shape by steps provided on the surface. Furthermore, a shade (22) that protects the internal lamp from external force and transmits and diffuses the light is attached to the inside of the storage recess (21) to which the internal lamp (19) is attached.

  (23) is a cross flow fan which is a cross-flow fan disposed on the ceiling surface of the refrigerator compartment (5) located in front of the interior light (19), and a casing ( 25).

  This cross flow fan (23) is provided with a motor (23a) as a driving part at one end thereof, and has a cylindrical shape in which a wide blade (23b) is erected on a rotating shaft extending in the width direction of the refrigerator compartment (5). When the motor (23a) is driven to rotate, the cool air staying in the cool air duct (20) at the rear is sucked as shown by the white arrow, and the casing (25) is directly below in the perpendicular direction. Blow toward.

  The cross flow fan (23) is not driven when the refrigerator compartment door (9) is closed, and the cold air generated by the refrigerator (10) for refrigeration under normal control is generated by the cooling fan (12). The product is guided to the cold air duct (15) by rotation and blown into the refrigerator compartment (5) from a plurality of outlets formed at the rear of the refrigerator compartment and the ceiling duct (20) to cool the stored items. When the chamber door (9) is opened, it is driven by the operation of a door switch (not shown) that detects opening and closing of the door, and the blown cold air has a width in the vicinity of the opening of the refrigerator compartment (5). A wide air flow is formed to flow down, and a curtain made of cold air is formed to block the inside of the refrigerator from outside air.

  Thus, when the refrigerator door (9) is closed, the cross flow fan (23) rotates backward for a predetermined time, for example, about 30 seconds, as can be understood from FIG. 4 showing the drive timing. The fan (23) rotated in the reverse direction sucks in the cold air in the refrigerator compartment (5) from directly below and blows it backward in the horizontal duct (20). As shown, the wind direction plate A (26) and the wind direction plate B (27) formed in the casing (25) cause the cool air to flow as indicated by the black arrows, and the interior lamp (19) portion and the fan motor portion ( 23a).

  At this time, the interior lamp (19) and its surroundings are in a high temperature state due to energization by the door opening, and are effectively cooled by the heat radiation action by blowing air, so that the heat influence in the refrigerator compartment (5) is prevented. be able to.

  In addition, when the fan motor (23) is exposed to the outside air by opening the door, especially when the installation atmosphere of the refrigerator body (1) is in a high temperature and high humidity environment, the motor portion (23a However, it is possible to prevent condensation by blowing air to the motor part due to reverse rotation, and to ensure that malfunctions such as control boards placed on the motor part occur due to frost formation after cooling after closing the door. Can be prevented.

  In the above case, if the opening time is short, such as several seconds, the lighting of the interior lamp (19) has almost no temperature effect on the surrounding wall surface or the refrigerator compartment. You may make it transfer to the cooling operation by the normal main cooling fan (12) and cooler (10) as it is, without rotating a flow fan (23) reversely.

  Furthermore, as shown in the timing chart of FIG. 5, the cross flow fan (23) is not limited to the above-mentioned control. When the door opening time exceeds 1 minute, the cross flow fan (23) rotates in reverse even during the door opening. The wind is sent to the interior lamp (19) and the fan motor (23a).

  In this case, the cross-flow fan (23) sucks the cold air in the refrigerator compartment (5) from below and sends it to the rear. When the reverse rotation time has passed 1 minute, the cross-flow fan (23) rotates again in the forward direction. It may be controlled to repeat forward rotation and reverse rotation over a predetermined time, such as by moving to form an air curtain. When the refrigerator door (9) is closed, the cross flow fan (23) And the normal cooling operation may be restored by rotating the refrigeration cooling fan (12) as the main fan.

  As described above, the long door opening time hardly occurs in a normal home use state. However, when the amount of storage in the refrigerator is very large, or in the case of demonstrations at store displays, trial opening by the customer will continue, and the interior lamp will be lit continuously. By controlling as described above, even if the interior lamp (19) continues to be lit due to a long opening time, the cooling by blowing air by reverse rotation of the cross flow fan (23) It can prevent abnormal overheating of the interior light (19) and its surroundings, prevent thermal deformation and ensure safety, and eliminate the dew condensation caused by the intrusion of hot and humid warm air, thereby improving the reliability of control equipment, etc. Can be improved.

  In addition, although the Example which provided the air curtain in the refrigerator compartment was demonstrated above, it cannot be overemphasized that you may apply to other storage rooms, such as not only this but a vegetable compartment and a freezer compartment.

  INDUSTRIAL APPLICATION This invention can be utilized for the refrigerator which has an air curtain mechanism by a crossflow fan.

It is a longitudinal cross-sectional view of the refrigerator which shows one Embodiment of this invention. It is a detailed longitudinal cross-sectional view which shows the structure of the refrigerator compartment upper part in FIG. It is a perspective view which shows the cross flow fan periphery structure of FIG. It is a timing chart which shows the relationship between an opening-and-closing door state and a cross flow fan. It is a timing chart which shows another Example.

Explanation of symbols

1 Refrigerator body 3 Inner box 5 Refrigeration room 9 Door 10 Refrigeration cooler 12 Cooling fan
15 Duct 18 Mounting shelf 19 Interior light
20 Ceiling duct 21 Storage recess 22 Shade
23 Cross flow fan 23a Fan motor 23b Blade
25 Casing 26 Wind direction plate A 27 Wind direction plate B

Claims (4)

  A storage room formed in a heat-insulating housing, a door that opens and closes the front opening of the storage room, a cool air duct and an interior lamp disposed on the ceiling of the storage room, and the interior lamp And a fan provided in front of the upper part of the storage chamber. The fan is driven when the door is opened to cool down the air in the form of an air curtain, and when the door is closed again, the direction of rotation of the fan The refrigerator is characterized in that the air is blown to the interior lamp section by reversing the above.   A storage room formed in a heat-insulating housing, a door that opens and closes the front opening of the storage room, a cool air duct and an interior lamp disposed on the ceiling of the storage room, and the interior lamp And a fan provided in front of the upper part of the storage chamber. When the door is opened, the fan is driven to cool down the air in the form of an air curtain. The refrigerator is characterized in that the direction of rotation is reversed and the fan is blown to the interior lamp section.   The refrigerator according to claim 1 or 2, wherein the fan is a cross flow fan that expands to the opening width of the storage chamber, and when the fan is rotated in the reverse direction, the fan is blown to the interior lamp and the drive unit of the fan. 4. The refrigerator according to claim 1, wherein a time for rotating the fan in reverse is set to a predetermined time, and the fan is stopped or returned to normal rotation after the predetermined time has elapsed.

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