LED lamp and illumination area having same

A freezer lamp includes a strip lamp holder, a light module, a socket, and a plurality of decks. The light module is disposed in the strip lamp holder. The socket is disposed on the end of the strip lamp holder and electrically connected to the light module. The strip lamp holder includes a main lateral surface and a mounting lateral surface. An installation groove is formed in the main lateral surface along length direction thereof. The light module is received into the installation groove. Two clamping grooves are formed in the mounting lateral surface along length direction thereof and are spaced apart from each other. Each of the decks includes two clamping edges which are spaced apart from each other. The distance between the two clamping edges is exactly equal to that between the two clamping grooves. The clamping edge is cooperating with the corresponding buckle of the clamping groove.

TECHNICAL FIELD

The invention relates to a lighting device, in particular, to a lighting lamp for freezer.

DESCRIPTION OF THE RELATED ART

Providing better sense for customer to choose and pick goods conveniently, present refrigerator and freezer manufacturer (especially refrigerator used in supermarket) tends to assemble corresponding light source to light the products. However, present light source in most refrigerator and freezer adopts traditional light source (e.g. incandescent lamp or fluorescent lamp) for providing illumination. When it's irradiating, there are problems including this lighting illumination of high power consumption, non-uniform illumination, shadow, and so on. In view of this situation, many manufacturers have made improvements on the present method of illumination of refrigerator and freezer, such as arranging a plurality of traditional light source in rows and columns to provide illumination. However, this method of illumination cannot fundamentally solve the problem of insufficient illumination, shadow, and so on. Moreover, it may further increase the power consumption.

In the current art, the patent such as the Chinese utility model, whose title is an unidirectional and bidirectional illuminating LED lamp for refrigerators and whose patent number is ZL200820207126.6, discloses a kind of lamp for refrigerator. The lamp includes LED light source, housing and holder. The housing includes a light transmission unit and a light emitting unit. The light transmission unit has an external surface and an internal surface that both have smooth arc shape. The light emitting unit has an external surface and an internal surface. The external surface of the light emitting unit has a smooth arc shape and the internal surface has a plurality of light reflections troughs formed thereon. The lamp is characterized with low power consumption, high efficiency, and long lifetime as it adopts LED as light source for illuminating, and the lamp makes use of the most of principles of transmission, refraction and reflection to distribute the light emitted from the LED light source to a wide range to avoid shadows and inadequate illumination appearing in the process of illuminating the cavity of freezer or refrigerator. However, it is difficult to install the above lamp as a lamp holder of the lamp is directly fixed to the mounting surface of the freezer that cannot assemble and disassemble immediately. And, only when the mounting surface is perfectly corresponding to the lamp holder contact surface, the lamp can ensure steady thereof. In addition, the lamp has not any waterproof sealing structure. When the lamp is used for a long time in the freezer, it is easy to be damaged which greatly shortens the lifetime thereof. Since the lamp is used in freezer whose internal environment in which humidity and water vapor exist because of temperature change, is different from the dry environment of conventional lamps.

DETAILED DESCRIPTION

The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one.

A freezer lamp according to the embodiment of the present invention is shown fromFIG. 1toFIG. 7. The freezer lamp includes a strip lamp holder1, a light module and two sockets7configured for connecting to an external power supply.

Wherein, the light module includes a printed circuit board2and a plurality of LED chips21electrically arranged on the printed circuit board2. The socket7is electrically connected with the printed circuit board2. A strip condensing lens3is arranged at front of the printed circuit board2. The cross-section of the strip condensing lens3may have a shape of approximate semicircular. Two lateral portions with certain width are formed at two side of the condensing lens3along length direction thereof.

The strip lamp holder1includes a main lateral surface11and a mounting lateral surface12. An installation groove111is formed on the main lateral surface11along length direction thereof. The cross-section of the installation groove111likes U-shape, and two bulgy strips112are respectively formed on the two lateral wall of the installation groove111along length direction thereof Each of the bulgy strips112divides the lateral wall of the installation groove111into an upper lateral surface a and a lower lateral surface b. A flat groove113is formed among the bulgy strip112, the lower lateral surface b of the installation groove111and the bottom of the installation groove111. The printed circuit board2is disposed onto the flat groove113, and is firmly fixed on the strip lamp holder1by screws22. An L-shape clamping portion is formed between the bulgy strip112and the upper lateral surface a of the installation groove111. A C-shape seal groove cavity114is formed in the clamping portion along length direction thereof. The seal groove cavity114has same size with a sealing strip4. The lower portion of two lateral sides of the condensing lens3touches against a portion of the sealing strip4which exposes out of the seal groove cavity114. A plurality of protrudes a1are formed on the top of the upper lateral wall a of the installation groove111, and the upper portion of two lateral sides of the condensing lens3are limited under the protrudes a1.

An inclined angle β is formed on the mounting lateral surface12with respect to the main lateral surface11, the angular value of the inclined angle β is predetermined according to the specific output angle of the freezer lamp. As the preferred, the included angle β can be selected as 45 degrees. In this condition, when the freezer lamp is assembled along vertical direction, the freezer lamp would illuminate the center of freezer which results in a better output angle.

Two clamping grooves are formed in the mounting lateral surface12along length direction thereof and are spaced apart from each other. The two clamping grooves include a first clamping groove121and a second clamping groove122. A convex groove123is opened between the first clamping groove121and the second clamping groove122along length direction thereof. An exit of the first clamping groove121is opened along a direction which is perpendicular to the mounting lateral surface12. A first blocking portion124is formed between the first clamping groove121and the convex groove123. A clamping part125is formed in the first blocking portion124along length direction thereof. An exit of the second clamping groove122is opened along a direction which is parallel to the mounting lateral surface12. A second blocking portion126is formed between the second clamping groove122and the convex groove123and is parallel to the mounting lateral surface12. The wall between the second blocking portion126and the convex groove123has an L-typed section. In order to assemble and disassemble the freezer lamp conveniently, pluralities of decks5are disposed on the mounting lateral surface12. Each of the decks5includes a main body51and two clamping edges52perpendicular to the main body51and spaced apart from each other. The main body51of the decks5is firmly fixed onto the freezer. A leaf spring53is formed on the main body51and tilts outward of the main body51. The leaf spring53can touch onto the bottom of the convex groove123. The cross-section of leaf spring53has a reverse J-shaped. Two through holes54are opened on the main body51and configured for crossing through the fastener so as to fix the decks5onto the freezer. In the present embodiment, the fastener is screw. The screw is fixed on the freezer after crossing through the through hole54such that the decks5can be fixedly connected to a mounting surface of the freezer. The distance between the two clamping edges52is exactly equal to that between the first and second clamping grooves121,122so that the two clamping edges52can be buttoned respectively into the first clamping groove121and the second clamping groove122. Specifically, as shown inFIG. 5, one of the clamping edges52is buttoned into the first clamping groove121and is limited on the clamping part125of the first blocking portion124, and the other is buttoned into the second clamping groove122and is limited onto the second blocking portion126.

Thus, when assembling the strip lamp holder1of the present embodiment, it's not assembled directly onto the mounting surface of the freezer. The decks5are fixed on mounting surface firstly, and then, the strip lamp holder1is buttoned into the decks5. As a result, assembly and disassembly of the strip lamp holder1is simpler and more convenient. In addition, the decks5have small size and occupy small space to assemble in fact. Therefore, operation becomes easier. Moreover, the surface of the strip lamp holder1does not directly contact the mounting surface of the freezer so as to protect the surface of the strip lamp holder1from being damaged, which elongates lifetime of the strip lamp holder1.

In order to lighten weight of the freezer lamp and save material, the strip lamp holder1is hollow. That is to say that a cavity13with special-shaped structure is opened in the middle portion of the strip lamp holder1along length direction thereof. Two sealing plugs6are respectively inserted into two ends of the strip lamp holder1so as to avoid moisture permeating thereinto for ensuring tightness thereof. The sealing plug6has same shape and size with the section of the cavity13. A tap-type hole131is formed on the cavity13along length direction thereof at two ends of holder1. Two end caps9are respectively disposed on two ends of the strip lamp holder1. A mounting hole (not shown) is opened in the end cap9in response to the tap-typed hole131. The end caps9are fixed on the strip lamp holder1by screw which crosses through the mounting hole and the tap-typed hole131.

In order to electrically connect the freezer lamp to the power supply conveniently, two sockets7are respectively formed at two ends of the strip lamp holder1. A plug connector is disposed on one end of each of the sockets7for electrically connecting external power supply. A wire72is disposed on the other end of each of the sockets7for electrically connecting the printed circuit board2. The freezer lamp further includes two protection suits8and the sockets7are inserted into the protection suits8respectively. An assembly open (not labeled) is opened in the protection suits8and a sealed cap81, which has same size and shape with the assembly open, is plug into the assembly open. The protection suits8are connected to the end caps9respectively via screws so as to assemble or disassemble conveniently. An aperture is formed in each of the end caps9for disposing the wire72of the socket7. The wire72of the socket7is electrically connected to the printed circuit board2.