KR101328262B1 - Back lamp for refrigerator using led - Google Patents

Abstract

The present invention relates to a rear lamp for a refrigerator using an LED, comprising a box-shaped housing fixed to a rear wall of a refrigerator, and a plurality of LEDs arranged at predetermined intervals so as to irradiate light in the downward direction. An LED array installed at an upper end, a stepped reflector having a plurality of reflective surfaces reflecting light emitted from the plurality of LEDs toward the front of the refrigerator, and the LED array installed at the front of the housing and provided inside the housing. And it provides a back lamp for a refrigerator using the LED is configured to include a transparent cover for blocking the stepped reflector to the outside.

Refrigerator, Lighting, LED, Reflector

Description

Back lamp for refrigerator using LED {BACK LAMP FOR REFRIGERATOR USING LED}

The present invention relates to a rear lamp for a refrigerator, and more particularly, as a lighting module, as an alternative to an incandescent lamp having a disadvantage of being bulky and having low light efficiency, it has not only a high color temperature and color rendering property but also an LED having excellent light efficiency. In addition, the present invention relates to a rear lamp for a refrigerator using an LED that can improve productivity by minimizing its configuration while having many advantages in terms of emotionality that a user feels.

In general, the refrigerator is provided with a lighting device so that the user can easily observe the internal storage space when using the refrigerator. Since the inside of the refrigerator is surrounded by walls except for the front side of the door, lighting inside the refrigerator is an essential device not only at night but also at daytime.

Such a lighting device has a structure in which a lighting lamp is turned on / off by a door switch interlocked with opening and closing of a refrigerator door. As a lighting lamp installed in the lighting device, a bulb lamp using a filament is widely used.

However, these filament bulbs have a limited lifespan, and thus have a hassle that needs to be replaced after a certain time. In addition, since a considerable amount of heat is generated in the light bulb itself during light emission, it is necessary to provide a space between the light bulb and the stored article so that the heat generated from the light bulb does not affect the goods stored and stored in the refrigerator. There is a problem in that it is difficult to secure a sufficient degree of illumination and lighting range due to the size of the bulb in the installation conditions in the refrigerator storage compartment case.

In view of these problems, in the refrigerator lighting apparatus of Korean Utility Model Registration No. 20-0312800, as shown in FIG. 1, a plurality of LEDs are provided in a plurality of LED installation holes 2 formed on the inner wall of the storage case 6 of the refrigerator. A printed circuit board (PCB) 5, in which luminescent diodes 1 are installed, is inserted and a reflection cover 3 is provided on the surfaces of the plurality of LEDs 1.

By the way, although the above invention solves the problem of the above-described conventional filament-type bulb to some extent, in general, the inside of the refrigerator has a multi-stage configuration partitioned into a plurality of partitions. In the case of the refrigerator lighting device of the registered utility model No. 20-0312800, the problem is that the lower side darker than the upper side still remains because the lighting does not reach the bottom.

In addition, in order to install the plurality of LEDs 1 on the inner wall of the refrigerator due to the structure of the lighting device of the refrigerator, a plurality of LED installation holes 2 are additionally formed, so that the configuration is very complicated, which leads to a problem of low productivity. have.

The present invention has been made to overcome the disadvantages of the prior art as described above, while installing a minimum LED to obtain sufficient illuminance inside the refrigerator, by improving the productivity by minimizing the configuration, through a luxurious atmosphere The technical problem is to provide a back lamp for a refrigerator using an LED that can satisfy the emotional aspect of the user.

The rear lamp for a refrigerator using the LED according to the present invention for achieving the technical problem as described above is a box-shaped housing fixed to the rear side wall inside the refrigerator, and a plurality of LEDs arranged at predetermined intervals to irradiate light downward And an LED array installed at an inner upper end of the housing, a stepped reflector having a plurality of reflecting surfaces for reflecting light emitted from the plurality of LEDs toward the front of the refrigerator, and a front panel of the housing The LED array and the stepped reflector provided therein are configured to include a transparent cover to block the outside.

In one embodiment of the present invention, the inclination angle of the reflecting surface RS _{n which} receives light irradiated vertically downward from the center of the plurality of LEDs among the plurality of reflecting surfaces is adjusted to be 45 degrees, and the half slope (RS _n) a reference to the angle of inclination of the upper side of the reflective surface _{(RS 1, RS 2 ... RS} n -1) is being formed is adjusted to less than 45, adjusted so that the inclination angle is decreased toward the upper side in order It is formed, the inclination angle of the lower reflection surface (RS _{n + 1} , RS _{n + 2} ... RS _m ) on the basis of the reflective surface (RS _n ) is controlled to be formed to be 45 degrees or more, sequential toward the lower side The tilt angle is adjusted to increase.

In one embodiment of the present invention, the inclination angle of the plurality of reflecting surfaces is preferably adjusted so that light reflected through the plurality of reflecting surfaces has an even brightness.

In an embodiment of the present invention, the inclination angles of the plurality of reflective surfaces are adjusted so that all the light reflected through the plurality of reflective surfaces travels horizontally with respect to the ground.

In one embodiment of the present invention preferably the stepped reflector plate is coated with a white material having high reflectivity and high diffusivity, like the coating material inside the refrigerator.

According to the rear lamp for a refrigerator using the LED according to the present invention having the configuration as described above, the LED has a small volume and semi-permanent service life of the light module compared to the incandescent bulb having a large volume but low light efficiency and a short service life. By applying it, there is an advantage that the layout design is easy, the volume inside the refrigerator is easy, and the durability is excellent.

In addition, productivity can be improved through a minimal configuration of a LED having high color temperature and color rendering property as well as an LED having excellent light efficiency and a plurality of reflecting surfaces, and also ensuring sufficient illuminance inside the refrigerator. By appropriately adjusting the number of reflection surfaces and the respective inclination angles, various moods can be produced, and through this, there is an advantage of satisfying various emotional aspects of the user.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the back lamp for a refrigerator using the LED according to the present invention. 2 is a perspective view of a rear lamp for a refrigerator using the LED according to the present invention, FIG. 3 is a cutaway side view as seen in FIG. 2A, and FIGS. 4 and 5 illustrate a reflection state of light according to embodiments of the present invention. The state diagram shown.

2 and 3, the back lamp 100 for a refrigerator using the LED according to the present invention is largely a box-shaped housing 110, an LED array 120 having a plurality of LEDs 122, a plurality of And a stepped reflector 130 having reflective surfaces 132 and a transparent cover 140.

The box-shaped housing 110 is fixedly installed on the rear wall (not shown) inside the refrigerator.

The LED array 120 is installed on an inner upper end of the box-shaped housing 110 and includes a plurality of LEDs 122 disposed at predetermined intervals along a length direction thereof. Each of the LEDs 122 irradiates light downward, and the irradiated light is refracted through the plurality of reflective surfaces 132 provided in the stepped reflector 130 to illuminate the inside of the refrigerator. Here, the number of the LEDs 122 may be selectively increased or decreased as needed. In one embodiment of the present invention, the LED 122 is basically composed of those irradiating white light having a color temperature of 6200 ~ 6500K, it is composed of those irradiating colored light of various colors if necessary to produce a variety of atmosphere It may be.

On the other hand, the position where the plurality of LEDs 122 are installed on the LED array 120 is a height from the inner rear of the box-shaped housing 110 to the center of the LEDs 122, as follows: It is determined through the same process. That is, while changing the height h from a low value to a high value, the position where the brightness of light refracted through the reflecting surfaces 132 to the front of the refrigerator is maximized, that is, the number of reflecting surfaces with high reflectivity is The maximum position will be found and determined. In this case, the determination position may vary according to the beam profile of the LEDs 122, and may be determined differently according to the size of the stepped reflector 130 and the number of the reflecting surfaces 132. Thus, once the above-described elements, namely the beam profile of the LEDs 122, the size of the stepped reflector 130, and the number of the reflecting surfaces 132 are determined, an optimization position is determined accordingly.

On the other hand, the above-described stepped reflector 130 is mounted on the inner rear of the box-shaped housing 110. The stepped reflector 130 has a stepped shape having a plurality of reflective surfaces 132 reflecting the light emitted from the plurality of LEDs 122 to the front of the refrigerator. The surface of the stepped reflector 130 is coated with a white PS (polystyrene) -based material having high reflectivity and high diffusion, similar to the coating material inside the refrigerator.

In this case, the brightness and the lighting atmosphere inside the refrigerator may be variously produced according to the type of the LEDs 122, the number of the reflective surfaces 132, and the respective inclination angles. Therefore, the types of the LEDs 122 and the number of the reflecting surfaces 132 are selected according to the design concept of the brightness and the lighting atmosphere of the refrigerator to be pursued, and then the reflecting surfaces 132 are respectively matched to the design concept. Optimization of the inclination angle should be made.

The number of the reflecting surfaces 132 is m, and the reflecting surfaces 132 sequentially arranged from top to bottom are RS ₁ , RS ₂ ... RS _{n -1} , RS _n , RS _{n +1} , RS _{When n +2} ... RS _m , RS _n of the reflecting surfaces 132 is a reflecting surface reflecting light irradiated vertically downward from the center of the LEDs 122 positioned through the above-described process. the inclination angle (α _n) is being formed is adjusted to control the road 45 is formed, the upper side of the reflecting surface of the RS, based on _n, that is, less than 45 degree tilt angle are the _{RS 1, RS 2 ... RS n} -1, as toward the image side are formed sequentially controlled so that the inclination angle is decreased, wherein the RS _n of the lower reflection surface based on, i.e., the inclination angle of the _{n + 1} RS, RS _{n + 2} ... RS _m is adjusted such that more than 45 It is formed, it is formed to adjust so that the inclination angle is sequentially increased toward the lower side. Through such a configuration, the light emitted from the LEDs 122 may be refracted through the reflective surfaces 132 to travel toward the front of the refrigerator where the user is to be located.

As an embodiment of the present invention, the plurality of reflecting surfaces 132 described above are even when the brightness of each of the reflected light is measured through optical simulation at a certain range of heights at positions away from the refrigerator by a certain distance. The inclination angles of the reflective surfaces 132 may be adjusted to have brightness. In this case, the uniform brightness means when the deviation of the brightness of each reflective surface 132 is the minimum, the predetermined distance and the height of the predetermined range is the size of the refrigerator, the installation height of the step reflector 130 and the user's line of sight height Since it is determined in consideration of the like and may vary in each case.

As an example of the predetermined distance and the range of the height, the height is about 1m75cm in consideration of the height of the refrigerator in the recent trend of large size, the length of the stepped reflector 130 installed in the refrigerator is about 50cm When the center height at the time of installation is about 1m40cm, the predetermined distance may be set to about 1m from the refrigerator in consideration of the door rotation radius of the refrigerator, and the range of the predetermined height may be set to 1m30cm ~ 1m50cm. This range is roughly consistent with the case where the user's gaze height is considered. That is, in the case of infants or the elderly, the gaze height of the standing state may be included in the above range, and in the case of an adult man and woman, the gaze height at the time of use of an adult man and woman is also approximately in the above range in consideration of the general bowing. May be included.

When observed based on the above-described range, the refraction progress path of the light in which the inclination angle is adjusted so that each reflective surface 132 of the stepped reflector 130 has an even brightness is shown in FIG. 5. The rear lamp 100 for a refrigerator using the LED according to the present invention as described above not only serves as an illumination device for securing sufficient illuminance inside the refrigerator, but also serves as an emotional lighting to satisfy the emotional side felt by the user. Can be.

In another embodiment of the present invention, the plurality of reflective surfaces 132 described above may have the inclination angle of each reflective surface 132 so that the light reflected therethrough proceeds horizontally with respect to the ground, as shown in FIG. 5. It may be regulated. In this case, the evenness of the brightness of each of the reflective surfaces 132 of the stepped reflector 130 may be relatively less depending on the height of the user's gaze, unlike the above-described embodiment, but may have a difference in maximizing illuminance inside the refrigerator. .

On the other hand, the front of the box-shaped housing 110 is provided with a transparent cover 140 to block the LED array 120 and the stepped reflector 130 provided in the box-shaped housing 110 from the outside to protect them. As the installation method of the transparent cover 140, a bolt fastening method through a plurality of bolts (not shown) or a hook (not shown) is formed in the transparent cover 140, and fitted into the box-shaped housing 110 ( And other well-known methods such as a method of forming the hook into the fitting groove to be coupled to each other.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Of course. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by the equivalents of the claims.

1 is a partially exploded perspective view of a lighting apparatus installed in a conventional refrigerator.

2 is a perspective view of a rear lamp for a refrigerator using the LED according to the present invention.

Fig. 3 is a cutaway side view as seen at Fig. 2A.

4 is a state diagram showing a reflection state of light according to an embodiment of the present invention.

5 is a state diagram showing a reflection state of light according to another embodiment of the present invention.

Description of Reference Numerals in Main Parts of the Drawings

110 housing 120 LED array

122: LED 130: reflector

132: reflective surface 140: transparent cover

Claims (6)

A box-shaped housing fixed to the rear side wall of the refrigerator; An LED array having a plurality of LEDs arranged at predetermined intervals to irradiate light in a downward direction and installed on an inner top of the housing; And Includes; a stepped reflector having a plurality of reflective surfaces for reflecting the light emitted from the plurality of LEDs to the front of the refrigerator, The inclination angle of the reflection surface RS _{n that} receives light irradiated vertically downward from the center of the plurality of LEDs among the plurality of reflection surfaces is adjusted to be 45 degrees, The inclination angle of the reflecting surface, the lower reflection surface based on the (RS _n) is the back of the refrigerator lamp using an LED which the tilting angle becomes larger the more distant from the reflective surface (RS _n) or smaller. The method of claim 1, The inclination angles of the upper reflection surfaces RS ₁ , RS ₂ ... RS _n-1 are adjusted to be 45 degrees or less based on the reflection surface RS _n , and the inclination angles of the reflection surfaces RS _n are gradually decreased toward the upper side. Is controlled to The inclination angle of the reflective surface (RS _n) in the lower side of the reflective surface (RS _{n + 1, n + 2} ... RS RS _m), based on the adjustment is being formed is at least 45, the inclination angle toward the lower side in sequence Refrigerator back lamp using the LED, characterized in that the control is configured to increase. The method of claim 2, The rear lamp of the refrigerator using the LED, characterized in that the inclination angle of the plurality of reflective surfaces is adjusted to have a uniform brightness of the light reflected through the plurality of reflective surfaces. The method of claim 2, And an inclination angle of the plurality of reflecting surfaces is adjusted so that all the light reflected through the plurality of reflecting surfaces proceeds horizontally with respect to the ground. 5. The method according to any one of claims 1 to 4, The stepped reflector is a back lamp for a refrigerator using an LED, characterized in that the coating is coated with a white material with high reflectivity and high diffusion, similar to the coating material inside the refrigerator. The method of claim 1, And a transparent cover installed on the front of the housing to block the LED array and the stepped reflector provided inside the housing from the outside.

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