WO2011109952A1 - Illumination system for top-opened refrigerator - Google Patents

Abstract

An illumination system for a top-opened refrigerator comprises an LED lamp (3) and a magnetic control switch controlling the on-off of the LED lamp (3), in which the LED lamp (3) and the magnetic control switch are provided on the refrigerator door body. The illumination system has advantages of energy saving and compact structure, and enables the illumination lamps in the refrigerator door being on and off following the opening and the closing of the refrigerator door without additional manually interfering. The lighting system also has function of anti-explosion.

Description

Top-opening door freezer lighting system

Technical field

The invention relates to the technical field of refrigerators and refrigerators in household electrical appliances, and more specifically, to a lighting system for top-opening refrigerators.

Background technique

The volume of refrigerator products on the market is getting larger and larger, and the structure of the refrigerator products themselves are made relatively deep. When the ambient light source cannot directly shine inside the cabinet, the light is often blocked by the tall and wide cabinet itself and cannot be illuminated. Items inside. Adding a lighting system inside the refrigerator to achieve auxiliary lighting of the items in the cabinet has become an important function of cold products.

At present, the horizontal freezer products with cabinet lighting on the market mostly use small-size and low-power incandescent lamps or fluorescent lamps, and the control switches are mostly mechanical switches that are toggled by external forces or ball rolling weight switches. Magnetically controlled proximity switches are also used in vertical freezer and refrigerator products. These solutions can automatically control the lights in the cabinet when opening and closing the door. However, the incandescent lamp has high heat and energy consumption and dim light. The main disadvantage is that the tungsten filament of the bulb is easy to break during frequent door opening and closing; the fluorescent lamp is large in size and occupies the effective volume in the cabinet, which is not convenient to use in the cabinet; the ball rolling weight switch has a larger volume due to its own structure. ; And there are hidden dangers in functional reliability and safety: sparking occurs when the steel ball rolls to connect or disconnect the circuit, and the surface of the iron ball is poorly oxidized when used for a long time. At present, most refrigerator products use R600a or R290 refrigerants as refrigerants. These refrigerants are flammable and explosive. Once internal leakage occurs, they are easily ignited by cremation. Therefore, the ball rolling hammer switch cannot be used in the cabinet. Proximity switches are also used in vertical freezer and refrigerator products. The control system switch and the light are located in different positions. The light is located in the cabinet, and the switch is located outside the cabinet, but the connection between them requires a long wire and the structure is not compact enough.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the shortcomings of the existing freezer lighting system technology, and provide a kind of energy saving, compact structure, without additional human intervention, which can automatically realize the opening and closing of the lighting lamp in the freezer door with the opening and closing of the door. Off the lighting system.

In order to solve the above technical problems, the technical solution of the present invention is: a top-opening door freezer lighting system, which includes an LED lamp installed on the door of the freezer and a magnetic switch that controls the on and off of the LED lamp.

The normal state of the magnetic control switch is off.

The LED lights are several LED lights in series and/or in parallel.

The magnetic control switch includes a reed switch, a guide rail and a magnet connected in series with the LED light. The high end of the guide rail slope is placed with a reed switch, and the magnet that controls the on and off of the reed switch by its own weight is located on the guide rail slope when the freezer door is closed. The low-end position.

The top-opening door freezer lighting system also includes a lampshade covering the outside of the LED lamp, the reed tube, the magnet and the guide rail.

The guide rail and the lampshade are integrated, and the guide rail is designed at the bottom of the lampshade.

The guide rail is an inclined guide rail that enables the magnet to roll or slide along the inclined surface from high to low when the refrigerator door is closed. The magnet is located at the low end of the inclined guide rail, and the reed switch is located at the high end of the inclined guide rail.

The magnet is a permanent magnet.

The magnet is in the shape of a round cake, a cylinder, or a square.

The dry reed switch is a fully plastic package.

The beneficial effects of the present invention over the prior art are:

The lighting system of the present invention adopts LED lighting. The system consumes very little energy, saves power, prolongs its service life, and the LED lamp is small in size and occupies less cabinet content; the magnet relies on its own gravity when the user opens and closes the door of the freezer The on and off of the circuit is controlled by rolling to realize the automation of the light on and off; the use of a compact magnetic proximity switch, the switch is sensitive and reliable, and the reed switch is fully plastic packaged, safe, no sparking, and explosion-proof Function, it can be used in the freezer product cabinets such as flammable and explosive R600a or R290 as the refrigerant; the lighting system of the present invention is equipped with inclined guide rails in the lampshade, the lampshade is used to protect the internal circuit of the LED, and the inclined guide rails are used for control The trajectory of the magnet makes the whole system small and compact.

Description of the drawings

The present invention will be further described below in conjunction with the drawings and specific embodiments.

Figure 1 is a schematic structural view of the front of the present invention when the freezer is open;

Figure 2 is a schematic structural view of the side of the present invention when the freezer is open;

Figure 3 is a partial enlarged view of Figure 2;

Figure 4 is a schematic diagram of the structure of the present invention when the freezer is open;

Figure 5 is a partial enlarged view of Figure 4;

Fig. 6 is a schematic diagram of the on-off of the magnet rolling control circuit of the present invention when the refrigerator door is opened and closed.

Detailed ways

Referring to Figure 1, Figure 2, Figure 3, a top-opening door freezer lighting system of the present invention includes an LED light 3 installed on the freezer door 1 and a magnetic switch that controls the on and off of the LED light 3; the normal state of the magnetic control switch is Disconnected; LED lamp 3 is a combination of several LED lamps in series and parallel. The currently designed LED contains 12 lamp beads, each of which is connected in series, and then 3 sets of series connected lamp beads are connected in parallel. The magnetic control switch includes a reed switch 4, a guide rail 7 and a magnet 5 connected in series with the LED light 3. One end of the guide rail 7 is placed on the reed switch 4, and the magnet 5 that controls the on and off of the reed switch 4 by rolling or sliding on its own weight is in the freezer The door body 1 is located at the other end of the guide rail 7 when the door is closed. The outside of the LED lamp 3, the reed tube 4, the magnet 5 and the guide rail 7 is covered with a lampshade 2. The lampshade 2 has a lampshade cover 6, and the lampshade 2 and the lampshade cover 6 can be integrated. The guide rail 7 is an inclined guide rail. The guide rail 7 and the lamp shade 2 are integrated. The guide rail 7 is designed at the bottom of the lamp shade 2. The magnet 5 is located at the low end of the inclined rail when the freezer door 1 is closed. The reed switch 4 is located at the high end of the inclined rail. Make an opening in the lampshade 2. After inserting the magnet 5 through the opening, seal it with the lampshade cover 6. The tilt angle of the inclined rail should be large enough to ensure that when the freezer door 1 is closed, the magnet 5 can follow the inclined surface on the rail Rolling or sliding from high to low, the magnet 5 is a permanent magnet, which can be made into a round pie-shaped body, a cylindrical body or a square-shaped body, and the reed switch 4 is a fully plastic package. With the opening and closing of the freezer door 1, the magnet 5 rolls along the inclined guide rail 7 in the lampshade 2 by its own gravity, and the inclined guide rail 7 is enclosed in the lampshade 2 to control the movement trajectory of the magnet 5.

When the freezer door 1 is opened (the freezer door 1 is perpendicular to the ground at this time), the magnet 5 placed in the lampshade 2 will roll along the guide rail 7 of the lampshade 2 from the lower part of the inclined guide rail slope to the slope under the action of gravity. At a high place, it is gradually approaching the reed switch 4, and the reed switch 4 in the normally-off state is subjected to the magnetic field of the magnet 5 and the two contacts are closed to connect the circuit, and the LED light 3 is on.

As shown in Figure 4 and Figure 5, when the freezer door 1 is closed (the door 1 is parallel to the ground at this time), the magnet 5 placed in the lampshade 2 follows the inner rail 7 of the lampshade 2 under the action of gravity, from the slope of the inclined rail The high place rolls to the low place of the slope, the magnet 5 and the fixed dry reed switch 4 gradually move away, the reed switch 4 cannot get the magnetic field of the magnet 5, and the two contacts are kept out of normal state, and the circuit cannot be connected. The LED light is off.

Figure 6 is a schematic diagram of the on-off of the magnet rolling control circuit of the present invention when the refrigerator door is opened and closed. State A is the door closed state, State B is the state where the door opening angle is equal to the angle of the lamp shade, and State C is the door opening angle is greater than the angle of the lamp shade. D state is the door open state.

When the door is opened, as the opening angle of the freezer door 1 becomes larger and larger, the lampshade 2 gradually turns from the horizontal state to the vertical state. When the rotation angle is greater than the angle between the inclined surface of the guide rail and the horizontal plane, the magnet 5 follows the lampshade under its own gravity. The inclined surface inside 2 rolls in the direction of the reed pipe, and the reed pipe 4 is closed by the force of the ferromagnetic field of the magnet 5, thereby connecting the circuit.

When the door is closed, the rolling direction of the magnet 5 is opposite to that when the door is opened. As the opening angle of the freezer door 1 becomes smaller and smaller, the lampshade 2 gradually turns from the vertical state to the horizontal state. When the freezer door 1 and the horizontal plane are smaller than the guide rail slope and At the angle of the horizontal plane, the magnet 5 rolls along the inner slope of the lampshade 2 in the direction away from the reed switch 4 under the action of its own gravity, the reed switch 4 loses the magnetic field force of the magnet 5 and resumes the normal state of disconnection, thereby disconnecting Circuit.

The lighting system of the invention has a compact structure, saves power, and has a long service life.

Claims (10)

1. A top-opening door freezer lighting system is characterized in that it comprises an LED light (3) installed on the freezer door (1) and a magnetic control switch for controlling the on and off of the LED light (3).
2. The top-opening door freezer lighting system according to claim 1, wherein the normal state of the magnetic control switch is off.
3. The top-opening door freezer lighting system according to claim 1, characterized in that: the LED lamp (3) is a plurality of LED lamps connected in series and/or in parallel.
4. The top-opening door freezer lighting system according to claim 1, characterized in that: the magnetic control switch comprises a reed switch (4), a guide rail (7) and a magnet (5) connected in series with the LED light (3), and the guide rail ( 7) One end of the reed switch (4) is placed, and the magnet (5) that controls the on/off of the reed switch (4) by its own weight is located at the other end of the guide rail (7) when the freezer door (1) is closed.
5. The top-opening door freezer lighting system according to claim 4, characterized in that it further comprises a lampshade (2) on the outside of the LED lamp (3), the reed switch (4), the magnet (5) and the guide rail (7). ).
6. The top-opening door freezer lighting system according to claim 5, characterized in that: the guide rail (7) and the lampshade (2) are integrated, and the guide rail (7) is designed at the bottom of the lampshade (2).
7. The top-opening door freezer lighting system according to claim 6, characterized in that: the guide rail (7) is such that when the freezer door (1) is closed, the magnet (5) can roll or roll along the inclined surface from high to low. Sliding the inclined rail, the magnet (5) is located at the low end of the inclined rail, and the reed switch (4) is located at the high end of the inclined rail.
8. The top-opening door freezer lighting system according to claim 7, wherein the magnet (5) is a permanent magnet.
9. The top-opening door freezer lighting system according to claim 8, characterized in that the magnet (5) is a round pie-shaped body, a cylindrical body or a square-shaped body.
10. The top-opening door freezer lighting system according to any one of claims 4 to 9, characterized in that: the reed switch (4) is a fully plastic package.

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