Refrigerator LED lamp control device and control method

Abstract

The application relates to a refrigerator LED lamp control device and a control method. The control device comprises: a recognition resistor Rx, which is connected in parallel with each constant-current LED lamp strip with the same input current but different specifications to form a constant-current LED lamp circuit; a controller, which is internally provided with: a constant-current LED lamp power output control circuit, which is connected with a power input terminal of the controller in input and connected with the constant-current LED lamp circuit in output; a constant-voltage LED lamp power output control circuit, which is connected with the power input terminal of the controller in input and connected with a constant-voltage LED lamp in output; and a main control module, which is used for setting preset parameters, controlling the constant-current LED lamp power output control circuit to supply power to the constant-current LED lamp, and controlling the constant-voltage LED lamp power output control circuit to supply power to the constant-voltage LED lamp. The application can supply power to the constant-current LED lamp and the constant-voltage LED lamp separately or simultaneously, has strong versatility, and is low in cost.

Description

Technical Field

[0001] This invention belongs to the field of electrical technology, and relates to freezer control technology. Specifically, it relates to a freezer LED light control device and control method. Background Technology

[0002] With the development of the times and the continuous acceleration of modernization, the demand for LED lighting in various industries is constantly increasing, and the display effects of lighting are also increasing. This has resulted in a wide variety of LED light types and specifications, and the required specifications of the switching power supplies have also increased accordingly. Controllers also need to be configured according to actual needs.

[0003] Currently, LED lights for freezers on the market include two types: constant current LED lights and constant voltage LED lights. On the one hand, both types of LED lights require separate power supplies, and the various specifications and lack of versatility create difficulties in procurement, production, and after-sales service. On the other hand, both types of LED lights require additional light switches to turn on and off. Furthermore, the brightness cannot be adjusted; a separate controller is needed for a dynamic lighting effect. Finally, combining both types of LED lights is costly. Summary of the Invention

[0004] This invention addresses the aforementioned problems of poor versatility and high cost of existing LED lights for refrigerators by providing a highly versatile and low-cost control device and method for LED lights in refrigerators.

[0005] To achieve the above objectives, the present invention provides a refrigerator LED light control device, comprising:

[0006] The identification resistor Rx is connected in parallel with each constant current LED strip with the same input current but different specifications to form a constant current LED lamp circuit;

[0007] Controller, with built-in features:

[0008] The constant current LED lamp power output control circuit includes a constant current LED lamp transformer T1, a constant current LED lamp switch S1, a constant current LED lamp detection switch Sr, and a measuring resistor R. The positive input terminal of the constant current LED lamp transformer T1 is connected to the positive input terminal L of the controller's power supply, and the negative input terminal of the constant current LED lamp transformer T1 is connected to the negative input terminal N of the controller's power supply. The positive output terminal of the constant current LED lamp transformer T1 is connected in series with a parallel circuit consisting of the constant current LED lamp switch S1, the constant current LED lamp detection switch Sr, and the measuring resistor R. This parallel circuit is then connected to one end of the constant current LED lamp circuit through the positive output terminal of the controller's constant current power supply. The other end of the constant current LED lamp circuit is connected to the negative output terminal of the constant current LED lamp transformer T1 through the negative output terminal of the controller's constant current power supply.

[0009] The constant voltage LED lamp power supply output control circuit includes a constant voltage LED lamp transformer T2 and a constant voltage LED lamp switch S2. The positive input terminal of the constant voltage LED lamp transformer T2 is connected to the positive input terminal L of the controller's power supply, and the negative input terminal of the constant voltage LED lamp transformer T2 is connected to the negative input terminal N of the controller's power supply. The positive output terminal of the constant voltage LED lamp transformer T2 is connected in series with the constant voltage LED lamp switch S2, and then connected to the positive terminal of the constant voltage LED lamp through the positive output terminal of the controller's constant voltage power supply. The negative terminal of the constant voltage LED lamp is connected to the negative output terminal of the constant voltage LED lamp transformer T2 through the negative output terminal of the constant voltage power supply. The control terminal of the constant voltage LED lamp is connected to the signal control line output terminal of the controller through a signal control line.

[0010] The control module is used to set preset detection voltage V, preset voltage value Vi, preset current value Ai, and mode parameter values ​​for the constant voltage LED lamp lighting parameter mode, and to control the opening and closing of constant current LED lamp switch S1, constant current LED lamp detection switch Sr, and constant voltage LED lamp switch S2. It is also used to detect the closed state of constant current LED lamp switch S1 when the constant current LED lamp is powered on, detect and measure the voltage value Vr of resistor R, match it with the preset voltage value Vi, and control the constant current LED lamp power supply output control circuit to output the current value Ai corresponding to the voltage value Vi to power the constant current LED lamp. Furthermore, it is used to detect the closed state of constant voltage LED lamp switch S2 when the constant voltage LED lamp is powered on, detect the mode parameter value of the lighting parameter mode, output the lighting parameter mode corresponding to the detected lighting parameter mode value, and control the constant voltage LED lamp power supply output control circuit to output the preset voltage value Vc to power the constant voltage LED lamp.

[0011] Preferably, the identification resistor Rx connected in parallel for constant current LED light strips with the same input current but different specifications has the same resistance value.

[0012] Preferably, the preset voltage value Vi corresponds one-to-one with the operating current of the constant current LED lamp, and the preset current value Ai is equal to the operating current of the constant current LED lamp; the constant voltage LED lamp lighting parameter modes include constant light mode, breathing light mode, light flashing mode, color changing mode, and running light mode, each mode corresponds to a mode parameter, and the mode parameter values ​​are different for different modes, and the preset voltage value Vc is equal to the operating voltage of the constant voltage LED lamp.

[0013] Preferably, when the constant current LED lamp is powered on, the control module controls the constant current LED lamp switch S1 to close and detects whether the constant current LED lamp switch S1 is closed. If it is closed, the control module provides a preset detection voltage V. This preset detection voltage V is insufficient to light up the entire constant current LED lamp. The control module detects the voltage value Vr of the measuring resistor R and matches the voltage value Vr with the preset voltage value Vi set by the control module. When Vr = Vi, the control module controls the constant current LED lamp transformer T1 to output the output current value Ai corresponding to the voltage value Vi to power the constant current LED lamp and saves the current value Ai. The control module then controls the constant current LED lamp detection switch Sr to close, lighting up the constant current LED lamp.

[0014] Preferably, when the constant voltage LED lamp is powered on, the control module controls the constant voltage LED lamp switch S2 to close and detects whether the constant voltage LED lamp switch S2 is closed. If it is closed, the control module detects the mode parameter value of the lighting parameter mode, outputs the lighting parameter mode corresponding to the detected lighting parameter mode value, and controls the constant voltage LED transformer T2 to output a preset voltage value Vc to power the constant voltage LED lamp and light up the constant voltage LED lamp.

[0015] Furthermore, it also includes a photosensitive control circuit, which includes a photosensitive sensor located outside the controller, a first photosensitive switch S3 and a second photosensitive switch S4 located inside the controller. The positive terminal of the photosensitive sensor is connected to the positive output terminal of the constant voltage LED transformer T2, and the negative terminal of the photosensitive sensor is connected to the negative output terminal of the constant voltage LED transformer T2. The signal terminal of the photosensitive sensor is connected to the signal transmission line terminal of the controller through a signal transmission line, and the signal transmission line terminal is connected to the negative output terminals of the constant current LED transformer T1 and the constant voltage LED transformer T2, respectively. The first photosensitive switch S3 is connected between the negative output terminal of the constant current LED transformer T1 and the negative output terminal of the constant current power supply of the controller. The second photosensitive switch S4 is connected between the negative output terminal of the constant voltage LED transformer T2 and the negative output terminal of the constant voltage power supply of the controller.

[0016] To achieve the above objectives, this application provides a method for controlling a constant current LED light in a freezer, employing the aforementioned freezer LED light control device, the specific steps of which are as follows:

[0017] The control module controls the constant current LED light switch S1 to close and detects whether the constant current LED light switch S1 is closed. If it is closed, the control module provides a preset detection voltage V, which is insufficient to light up the entire constant current LED light.

[0018] The control module detects and measures the voltage value Vr of the resistor R, and matches the voltage value Vr with the preset voltage value Vi set by the control module. When Vr = Vi, the control module controls the constant current LED lamp transformer T1 to output the current value Ai corresponding to the voltage value Vi to power the constant current LED lamp, and saves the current value Ai. The control module controls the constant current LED lamp detection switch Sr to close, and lights up the constant current LED lamp. Each time the constant current LED lamp is lit, the current output current value Ai is saved. If the identification resistor Rx is damaged, the constant current LED lamp is lit directly according to the previously saved current value Ai.

[0019] To achieve the above objectives, the present invention also provides a constant voltage LED light control method for a freezer, using the aforementioned freezer LED light control device. The specific steps are as follows: the control module controls the constant voltage LED light switch S2 to close and detects whether the constant voltage LED light switch S2 is closed. If it is closed, the control module detects the mode parameter value of the lighting parameter mode, outputs the lighting parameter mode corresponding to the detected lighting parameter mode value, and controls the constant voltage LED transformer T2 to output a preset voltage value Vc to power the constant voltage LED light, thereby lighting the constant voltage LED light.

[0020] To achieve the above objectives, the present invention further provides a method for controlling LED lights in a freezer, employing the aforementioned LED light control device for a freezer, the specific steps of which are as follows:

[0021] When the constant current LED is powered on, the control module controls the constant current LED switch S1 to close and detects whether the constant current LED switch S1 is closed. If it is closed, the control module provides a preset detection voltage V, which is insufficient to light up the entire constant current LED. The control module detects the voltage value Vr of the measuring resistor R and matches the voltage value Vr with the preset voltage value Vi set by the control module. When Vr = Vi, the control module controls the constant current LED transformer T1 to output the current value Ai corresponding to the voltage value Vi to power the constant current LED and saves the current value Ai. The control module then controls the constant current LED detection switch Sr to close and lights up the constant current LED. Each time the constant current LED is lit, the current output value Ai is saved. If the identification resistor Rx is damaged, the constant current LED is lit directly according to the previously saved current value Ai.

[0022] When the constant voltage LED is powered on, the control module controls the constant voltage LED switch S2 to close and detects whether the constant voltage LED switch S2 is closed. If it is closed, the control module detects the mode parameter value of the lighting parameter mode, outputs the lighting parameter mode corresponding to the detected lighting parameter mode value, and controls the constant voltage LED transformer T2 to output the preset voltage value Vc to power the constant voltage LED and light up the constant voltage LED.

[0023] To achieve the above objectives, the present invention also provides a method for controlling LED lights in a freezer, using the aforementioned LED light control device for a freezer, the specific steps of which are as follows:

[0024] When the constant current LED is powered on, the control module controls the constant current LED switch S1 to close and checks whether the constant current LED switch S1 is closed. If it is closed, the control module controls the first photosensitive switch S3 to close based on the photosensitive value detected by the photoresistor, indicating whether it is bright or dark, and checks whether the first photosensitive switch S3 is closed. If it is closed, the control module provides a preset detection voltage V, which is insufficient to light up the entire constant current LED. The control module detects the voltage value Vr of the measuring resistor R and matches the voltage value Vr with the preset voltage value Vi set by the control module. When Vr = Vi, the control module controls the constant current LED transformer T1 to output the current value Ai corresponding to the voltage value Vi to power the constant current LED and saves the current value Ai. The control module then controls the constant current LED detection switch Sr to close, lighting up the constant current LED. Each time the constant current LED is lit, the current output value Ai is saved. If the identification resistor Rx is damaged, the constant current LED is lit directly according to the previously saved current value Ai.

[0025] When the constant voltage LED is powered on, the control module controls the constant voltage LED switch S2 to close and detects whether the constant voltage LED switch S2 is closed. If it is closed, the control module controls whether the second photosensitive switch S4 is closed based on the photosensitive value detected by the photoresistor, indicating whether it is bright or dark, and detects whether the second photosensitive switch S4 is closed. If it is closed, the control module detects the mode parameter value of the lighting parameter mode, outputs the lighting parameter mode corresponding to the detected lighting parameter mode value, and controls the constant voltage LED transformer T2 to output the preset voltage value Vc to power the constant voltage LED, thus lighting up the constant voltage LED.

[0026] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0027] (1) The control device and control method of the present invention can control constant current LED lamps and constant voltage LED lamps separately, and can also realize the simultaneous dual control of constant current LED lamps and constant voltage LED lamps. It can intelligently output current to power constant current LED lamps of different current and specifications, and can change the lighting mode of different constant voltage LED lamps. It is highly versatile, has many uses, is easy to install and has low cost.

[0028] (2) The present invention also includes photosensitive control, which performs the on-time and off-time operation of constant current LED lamp and constant voltage LED lamp by detecting different photosensitive values ​​of visible light, thereby controlling the on-time and off-time of constant current LED lamp and constant voltage LED lamp. When the photosensitive sensor detects that the photosensitive value is dark (i.e., simulating the nighttime shutdown state), the power output of constant current LED lamp and constant voltage LED lamp is automatically disconnected. When the photosensitive sensor detects that the photosensitive value is bright (i.e., simulating the daytime business state), the power output of constant current LED lamp and constant voltage LED lamp is automatically turned on, thereby saving energy. Attached Figure Description

[0029] Figure 1-2 This is a circuit diagram of the freezer LED light control device according to an embodiment of the present invention;

[0030] Figure 3-4 This is a flowchart illustrating the control of a constant current LED lamp according to an embodiment of the present invention;

[0031] Figure 5-6 This is a flowchart illustrating the control of a constant voltage LED lamp according to an embodiment of the present invention.

[0032] In the diagram, 1 is a constant current LED lamp, 2 is a constant current LED lamp circuit, 3 is a controller, 4 is a constant voltage LED lamp, 5 is a signal control line, 6 is a photosensitive sensor, and 7 is a signal transmission line. Detailed Implementation

[0033] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0034] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Example 1: See Figure 1 A refrigerator LED light control device, comprising:

[0036] The identification resistor Rx is connected in parallel with each constant current LED strip 1 with the same input current but different specifications to form a constant current LED circuit 2;

[0037] Controller 3, built-in:

[0038] The constant current LED lamp power output control circuit includes a constant current LED lamp transformer T1, a constant current LED lamp switch S1, a constant current LED lamp detection switch Sr, and a measuring resistor R. The positive input terminal of the constant current LED lamp transformer T1 is connected to the positive input terminal L of the power supply of the controller 3, and the negative input terminal of the constant current LED lamp transformer T1 is connected to the negative input terminal N of the power supply of the controller 3. The positive input terminal L of the power supply of the controller 3 is connected to the positive terminal of the power plug XP, and the negative input terminal N of the power supply of the controller 3 is connected to the negative terminal of the power plug XP. The positive output terminal of the constant current LED lamp transformer T1 is connected in series with the parallel circuit formed by the constant current LED lamp switch S1, the constant current LED lamp detection switch Sr, and the measuring resistor R. This circuit is then connected to one end of the constant current LED lamp circuit through the positive output terminal of the constant current power supply of the controller 3. The other end of the constant current LED lamp circuit is connected to the negative output terminal of the constant current LED lamp transformer T1 through the negative output terminal of the constant current power supply of the controller 3.

[0039] The constant voltage LED lamp power supply output control circuit includes a constant voltage LED lamp transformer T2 and a constant voltage LED lamp switch S2. The positive input terminal of the constant voltage LED lamp transformer T2 is connected to the positive power input terminal L of the controller 3, and the negative input terminal of the constant voltage LED lamp transformer T2 is connected to the negative power input terminal N of the controller 3. The positive output terminal of the constant voltage LED lamp transformer T2 is connected in series with the constant voltage LED lamp switch S2, and then connected to the positive terminal of the constant voltage LED lamp through the constant voltage power supply positive output terminal of the controller 3. The negative terminal of the constant voltage LED lamp is connected to the negative output terminal of the constant voltage LED lamp transformer T2 through the constant voltage power supply negative output terminal. The control terminal of the constant voltage LED lamp is connected to the signal control line output terminal of the controller 3 through the signal control line 5.

[0040] The control module is used to set preset detection voltage V, preset voltage value Vi, preset current value Ai, and mode parameter values ​​for the constant voltage LED lamp lighting parameter mode, and to control the opening and closing of constant current LED lamp switch S1, constant current LED lamp detection switch Sr, and constant voltage LED lamp switch S2. It is also used to detect the closed state of constant current LED lamp switch S1 when the constant current LED lamp is powered on, detect and measure the voltage value Vr of resistor R, match it with the preset voltage value Vi, and control the constant current LED lamp power supply output control circuit to output the current value Ai corresponding to the voltage value Vi to power the constant current LED lamp. Furthermore, it is used to detect the closed state of constant voltage LED lamp switch S2 when the constant voltage LED lamp is powered on, detect the mode parameter value of the lighting parameter mode, output the lighting parameter mode corresponding to the detected lighting parameter mode value, and control the constant voltage LED lamp power supply output control circuit to output the preset voltage value Vc to power the constant voltage LED lamp.

[0041] Specifically, the identification resistor Rx connected in parallel for constant current LED light strips with the same input current but different specifications has the same resistance value. In other words, the identification resistor Rx on constant current LED light strips with different input currents has different resistance values.

[0042] Specifically, the preset voltage value Vi corresponds one-to-one with the operating current of the constant current LED lamp, and the preset current value Ai is equal to the operating current of the constant current LED lamp; the constant voltage LED lamp lighting parameter modes include constant light mode, breathing light mode, light flashing mode, color changing mode, and running light mode. Each mode corresponds to a mode parameter, and the mode parameter values ​​are different for different modes. The preset voltage value Vc is equal to the operating voltage of the constant voltage LED lamp.

[0043] Specifically, see Figure 3 When the constant current LED light is powered on, the control module controls the constant current LED light switch S1 to close and detects whether the constant current LED light switch S1 is closed. If it is closed, the control module provides a preset detection voltage V. This preset detection voltage V is insufficient to light up the entire constant current LED light. The control module detects the voltage value Vr of the measuring resistor R and matches the voltage value Vr with the preset voltage value Vi set by the control module. When Vr = Vi, the control module controls the constant current LED light transformer T1 to output the output current value Ai corresponding to the voltage value Vi to power the constant current LED light and saves the current value Ai. The control module then controls the constant current LED light detection switch Sr to close and lights up the constant current LED light. It should be noted that when detecting the voltage value Vr of the measuring resistor R, the identification resistor Rx and the measuring resistor R are connected in series. Since the sum of the resistance values ​​of the two resistors is 100 to 2000 times the sum of the resistance values ​​of the LED beads on the constant current LED strip, which is much larger than the sum of the resistance values ​​of the LED beads on the constant current LED strip, the voltage drop on the LED bead circuit of the constant current LED strip can be ignored. After the control module detects the voltage of the measuring resistor R, it outputs a current value to power the constant current LED strip. At this time, the constant current LED light switch S1 of the measuring resistor is short-circuited and does not participate in the constant current LED strip lighting circuit.

[0044] Specifically, see Figure 5 When the constant voltage LED light is powered on, the control module controls the constant voltage LED light switch S3 to close and detects whether the constant voltage LED light switch S2 is closed. If so, the control module detects the mode parameter value of the lighting parameter mode, outputs the lighting parameter mode corresponding to the detected lighting parameter mode value, and controls the constant voltage LED transformer T2 to output a preset voltage value Vc to power the constant voltage LED light, thus lighting the constant voltage LED light. It should be noted that by setting different mode parameter values ​​for different lighting parameter modes, different mode conversions can be achieved (e.g., constant light, breathing light, flashing light, color change, running light mode).

[0045] The above-mentioned LED light control device for the freezer in this embodiment can output current to power constant current LED lights of different specifications by setting preset voltage and current values; by setting different lighting parameter values, different mode conversions can be achieved (e.g., constant light, breathing light, light flashing, color change, running light mode). It is highly versatile, has many uses, is easy to install, and has low cost.

[0046] Example 2: See Figure 3 This embodiment provides a constant current LED light control method for a freezer, using the freezer LED light control device described in Embodiment 1. The specific steps are as follows:

[0047] S1. Power on the constant current LED lamp. The control module controls the constant current LED lamp switch S1 to close and detects whether the constant current LED lamp switch S1 is closed.

[0048] S2. If the constant current LED light switch S1 is closed, the control module provides a preset detection voltage V, which is insufficient to light up the entire constant current LED light.

[0049] S3. Based on the principle of voltage division by resistors, the control module detects and measures the voltage value Vr of resistor R;

[0050] S4. Match the voltage value Vr with the preset voltage value Vi set by the control module. When Vr = Vi, the control module controls the constant current LED lamp transformer T1 to output the current value Ai corresponding to the voltage value Vi to power the constant current LED lamp, and saves the current value Ai.

[0051] S5. The control module controls the constant current LED light detection switch Sr to close, lighting up the constant current LED light.

[0052] It should be noted that the output current value Ai is saved each time the constant current LED is lit. If the identification resistor Rx is damaged, the constant current LED will be lit directly according to the previously saved current value Ai.

[0053] The constant current LED light control method for refrigerators described in this embodiment can output current to power constant current LED lights of different currents and specifications by setting preset voltage and current values. It is highly versatile, has many uses, and is low in cost.

[0054] Example 3: See Figure 5 This embodiment provides a method for controlling a constant-pressure LED light in a freezer, using the freezer LED light control device described in Embodiment 1. The specific steps are as follows:

[0055] S1. Power is supplied to the constant voltage LED. The control module controls the constant voltage LED light switch S2 to close and detects whether the constant voltage LED light switch S2 is closed.

[0056] S2. If the constant voltage LED light switch S2 is closed, the control module detects the mode parameter value of the lighting parameter mode and outputs the lighting parameter mode corresponding to the detected lighting parameter mode value.

[0057] S3. The control module controls the constant voltage LED transformer T2 to output a preset voltage value Vc to power the constant voltage LED lamp and light it up.

[0058] The constant voltage LED light control method for refrigerators described in this embodiment can achieve different mode conversions (e.g., constant light, breathing light, light flashing, color change, and running light mode) by setting different lighting parameter values. It is applicable to different constant voltage LED light power supplies, has strong versatility, multiple uses, and low cost.

[0059] Example 4: This example provides a method for controlling LED lights in a freezer, using the aforementioned LED light control device for a freezer. The specific steps are as follows:

[0060] See also Figure 3 When the constant current LED is powered on, the control module controls the constant current LED switch S1 to close and detects whether the constant current LED switch S1 is closed. If it is closed, the control module provides a preset detection voltage V, which is insufficient to light up the entire constant current LED. The control module detects the voltage value Vr of the measuring resistor R and matches the voltage value Vr with the preset voltage value Vi set by the control module. When Vr = Vi, the control module controls the constant current LED transformer T1 to output the current value Ai corresponding to the voltage value Vi to power the constant current LED and saves the current value Ai. The control module then controls the constant current LED detection switch Sr to close and lights up the constant current LED. Each time the constant current LED is lit, the current output value Ai is saved. If the identification resistor Rx is damaged, the constant current LED is lit directly according to the previously saved current value Ai.

[0061] See also Figure 5 When the constant voltage LED is powered on, the control module controls the constant voltage LED switch S2 to close and detects whether the constant voltage LED switch S2 is closed. If it is closed, the control module detects the mode parameter value of the lighting parameter mode, outputs the lighting parameter mode corresponding to the detected lighting parameter mode value, and controls the constant voltage LED transformer T2 to output the preset voltage value Vc to power the constant voltage LED and light up the constant voltage LED.

[0062] The above-described refrigerator LED light control method in this embodiment can output current to power constant current LEDs of different specifications by setting preset voltage and current values; by setting different lighting parameter values, different mode conversions can be achieved (e.g., constant light, breathing light, light flashing, color change, running light mode), which is applicable to different constant voltage LED power supplies, has strong versatility, multiple uses, and low cost.

[0063] Example 5: See Figure 2 A refrigerator LED light control device, comprising:

[0064] The identification resistor Rx is connected in parallel with each constant current LED strip 1 with the same input current but different specifications to form a constant current LED circuit 2;

[0065] Controller 3, built-in:

[0066] The constant current LED lamp power output control circuit includes a constant current LED lamp transformer T1, a constant current LED lamp switch S1, a constant current LED lamp detection switch Sr, and a measuring resistor R. The positive input terminal of the constant current LED lamp transformer T1 is connected to the positive input terminal L of the power supply of the controller 3, and the negative input terminal of the constant current LED lamp transformer T1 is connected to the negative input terminal N of the power supply of the controller 3. The positive input terminal L of the power supply of the controller 3 is connected to the positive terminal of the power plug XP, and the negative input terminal N of the power supply of the controller 3 is connected to the negative terminal of the power plug XP. The positive output terminal of the constant current LED lamp transformer T1 is connected in series with the parallel circuit formed by the constant current LED lamp switch S1, the constant current LED lamp detection switch Sr, and the measuring resistor R. This circuit is then connected to one end of the constant current LED lamp circuit through the positive output terminal of the constant current power supply of the controller 3. The other end of the constant current LED lamp circuit is connected to the negative output terminal of the constant current LED lamp transformer T1 through the negative output terminal of the constant current power supply of the controller 3.

[0067] The constant voltage LED lamp power supply output control circuit includes a constant voltage LED lamp transformer T2 and a constant voltage LED lamp switch S2. The positive input terminal of the constant voltage LED lamp transformer T2 is connected to the positive power input terminal L of the controller 3, and the negative input terminal of the constant voltage LED lamp transformer T2 is connected to the negative power input terminal N of the controller 3. The positive output terminal of the constant voltage LED lamp transformer T2 is connected in series with the constant voltage LED lamp switch S2, and then connected to the positive terminal of the constant voltage LED lamp through the constant voltage power supply positive output terminal of the controller 3. The negative terminal of the constant voltage LED lamp is connected to the negative output terminal of the constant voltage LED lamp transformer T2 through the constant voltage power supply negative output terminal. The control terminal of the constant voltage LED lamp is connected to the signal control line output terminal of the controller 3 through the signal control line 5.

[0068] The control module is used to set preset detection voltage V, preset voltage value Vi, preset current value Ai, and mode parameter values ​​for the constant voltage LED lamp lighting parameter mode, and to control the opening and closing of constant current LED lamp switch S1, constant current LED lamp detection switch Sr, and constant voltage LED lamp switch S2; it is also used to detect the closed state of constant current LED lamp switch S1 when the constant current LED lamp is powered on, detect the voltage value Vr of the measuring resistor R, match it with the preset voltage value Vi, and control the constant current LED lamp power supply output control circuit to output the current value Ai corresponding to the voltage value Vi to power the constant current LED lamp; it is also used to detect the closed state of constant voltage LED lamp switch S2 when the constant voltage LED lamp is powered on, detect the mode parameter value of the lighting parameter mode, output the lighting parameter mode corresponding to the detected lighting parameter mode value, and control the constant voltage LED lamp power supply output control circuit to output the preset voltage value Vc to power the constant voltage LED lamp;

[0069] The photosensitive control circuit includes a photosensitive sensor 6 located outside the controller 3, and a first photosensitive switch S3 and a second photosensitive switch S4 located inside the controller 3. The positive terminal of the photosensitive sensor 6 is connected to the positive output terminal of the constant voltage LED transformer T2, and the negative terminal of the photosensitive sensor 6 is connected to the negative output terminal of the constant voltage LED transformer T2. The signal terminal of the photosensitive sensor 6 is connected to the signal transmission line terminal of the controller 3 through the signal transmission line 7. The signal transmission line terminal is connected to the negative output terminals of the constant current LED transformer T1 and the constant voltage LED transformer T2, respectively. The first photosensitive switch S3 is connected between the negative output terminal of the constant current LED transformer T1 and the negative output terminal of the constant current power supply of the controller 3. The second photosensitive switch S4 is connected between the negative output terminal of the constant voltage LED transformer T2 and the negative output terminal of the constant voltage power supply of the controller 3.

[0070] Specifically, the identification resistor Rx connected in parallel for constant current LED light strips with the same input current but different specifications has the same resistance value. In other words, the identification resistor Rx on constant current LED light strips with different input currents has different resistance values.

[0071] Specifically, the preset voltage value Vi corresponds one-to-one with the operating current of the constant current LED lamp, and the preset current value Ai is equal to the operating current of the constant current LED lamp; the constant voltage LED lamp lighting parameter modes include constant light mode, breathing light mode, light flashing mode, color changing mode, and running light mode. Each mode corresponds to a mode parameter, and the mode parameter values ​​are different for different modes. The preset voltage value Vc is equal to the operating voltage of the constant voltage LED lamp.

[0072] Specifically, see Figure 4When the constant current LED light is powered on, the control module controls the constant current LED light switch S1 to close and detects whether the constant current LED light switch S1 is closed. If it is closed, the control module controls whether the first photosensitive switch S3 is closed based on the photosensitive value detected by the photoresistor, indicating whether it is bright or dark, and detects whether the first photosensitive switch S3 is closed. If it is closed, the control module provides a preset detection voltage V, which is insufficient to light up the entire constant current LED light. The control module detects the voltage value Vr of the measuring resistor R and matches the voltage value Vr with the preset voltage value Vi set by the control module. When Vr = Vi, the control module controls the constant current LED light transformer T1 to output the current value Ai corresponding to the voltage value Vi to power the constant current LED light and saves the current value Ai. The control module then controls the constant current LED light detection switch Sr to close, lighting up the constant current LED light. It should be noted that when detecting the voltage value Vr of the measuring resistor R, the identification resistor Rx and the measuring resistor R are connected in series. Since the sum of the resistance values ​​of the two resistors is 100 to 2000 times the sum of the resistance values ​​of the LED beads on the constant current LED strip, which is much larger than the sum of the resistance values ​​of the LED beads on the constant current LED strip, the voltage drop on the LED bead circuit of the constant current LED strip can be ignored. After the control module detects the voltage of the measuring resistor R, it outputs a current value to power the constant current LED strip. At this time, the constant current LED light switch S1 of the measuring resistor is short-circuited and does not participate in the constant current LED strip lighting circuit.

[0073] Specifically, see Figure 6 When the constant voltage LED light is powered on, the control module controls the constant voltage LED light switch S2 to close and detects whether the constant voltage LED light switch S2 is closed. If it is closed, the control module controls whether the second photosensitive switch S4 is closed based on the photosensitive value detected by the photoresistor, indicating whether it is bright or dark, and detects whether the second photosensitive switch S4 is closed. If it is closed, the control module detects the mode parameter value of the lighting parameter mode, outputs the lighting parameter mode corresponding to the detected lighting parameter mode value, and controls the constant voltage LED transformer T2 to output the preset voltage value Vc to power the constant voltage LED light, thus lighting the constant voltage LED light. It should be noted that by setting different mode parameter values ​​for different lighting parameter modes, different mode conversions can be achieved (e.g., constant light, breathing light, light flashing, color changing, running light mode).

[0074] The above-mentioned LED light control device for the freezer in this embodiment can output current to power constant current LED lights of different specifications by setting preset voltage and current values; by setting different lighting parameter values, different mode conversions can be achieved (e.g., constant light, breathing light, light flashing, color change, running light mode). It is highly versatile, has many uses, is easy to install, and has low cost.

[0075] In this embodiment, the above-mentioned LED light control device for the freezer automatically disconnects the power output of the LED light when the photosensitive sensor detects a light value indicating darkness (i.e., simulating a nighttime shutdown state) while the LED light is powered on, thereby saving energy.

[0076] Example 6: This example provides a method for controlling LED lights in a freezer, using the LED light control device for a freezer described in Example 5. The specific steps are as follows:

[0077] See also Figure 4 When the constant current LED is powered on, the control module controls the constant current LED switch S1 to close and detects whether the constant current LED switch S1 is closed. If it is closed, the control module controls whether the first photosensitive switch S3 is closed based on the photosensitive value detected by the photoresistor, indicating whether it is bright or dark, and detects whether the first photosensitive switch S3 is closed. If it is closed, the control module provides a preset detection voltage V, which is insufficient to light up the entire constant current LED. The control module detects the voltage value Vr of the measuring resistor R and matches the voltage value Vr with the preset voltage value Vi set by the control module. When Vr = Vi, the control module controls the constant current LED transformer T1 to output the current value Ai corresponding to the voltage value Vi to power the constant current LED and saves the current value Ai. The control module then controls the constant current LED detection switch Sr to close, lighting up the constant current LED. Each time the constant current LED is lit, the current output value Ai is saved. If the identification resistor Rx is damaged, the constant current LED is lit directly according to the previously saved current value Ai.

[0078] See also Figure 6 When the constant voltage LED is powered on, the control module controls the constant voltage LED switch S2 to close and detects whether the constant voltage LED switch S2 is closed. If it is closed, the control module controls whether the second photosensitive switch S4 is closed based on the photosensitive value detected by the photoresistor, indicating whether it is bright or dark, and detects whether the second photosensitive switch S4 is closed. If it is closed, the control module detects the mode parameter value of the lighting parameter mode, outputs the lighting parameter mode corresponding to the detected lighting parameter mode value, and controls the constant voltage LED transformer T2 to output the preset voltage value Vc to power the constant voltage LED, thus lighting up the constant voltage LED.

[0079] The above-described LED light control method for refrigerators in this embodiment can output current to power constant current LEDs of different specifications by setting preset voltage and current values; by setting different lighting parameter values, different mode conversions can be achieved (e.g., constant light, breathing light, light flashing, color change, running light mode). It is highly versatile, has many uses, is easy to install, and has low cost.

[0080] In this embodiment, the above-mentioned LED light control method for the freezer automatically disconnects the LED light power output when the photosensitive sensor detects a light value indicating darkness (i.e., simulating a nighttime shutdown state) while the LED light is powered on, thereby saving energy.

[0081] The above embodiments are used to explain the present invention, but not to limit the present invention. Any modifications and changes made to the present invention within the spirit and scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A control device for LED lights in a freezer, characterized in that, include: The identification resistor Rx is connected in parallel with each constant current LED strip with the same input current but different specifications to form a constant current LED lamp circuit; Controller, with built-in features: The constant current LED lamp power output control circuit includes a constant current LED lamp transformer T1, a constant current LED lamp switch S1, a constant current LED lamp detection switch Sr, and a measuring resistor R. The positive input terminal of the constant current LED lamp transformer T1 is connected to the positive input terminal L of the controller's power supply, and the negative input terminal of the constant current LED lamp transformer T1 is connected to the negative input terminal N of the controller's power supply. The positive output terminal of the constant current LED lamp transformer T1 is connected in series with a parallel circuit consisting of the constant current LED lamp switch S1, the constant current LED lamp detection switch Sr, and the measuring resistor R. This parallel circuit is then connected to one end of the constant current LED lamp circuit through the positive output terminal of the controller's constant current power supply. The other end of the constant current LED lamp circuit is connected to the negative output terminal of the constant current LED lamp transformer T1 through the negative output terminal of the controller's constant current power supply. The constant voltage LED lamp power supply output control circuit includes a constant voltage LED lamp transformer T2 and a constant voltage LED lamp switch S2. The positive input terminal of the constant voltage LED lamp transformer T2 is connected to the positive input terminal L of the controller's power supply, and the negative input terminal of the constant voltage LED lamp transformer T2 is connected to the negative input terminal N of the controller's power supply. The positive output terminal of the constant voltage LED lamp transformer T2 is connected in series with the constant voltage LED lamp switch S2, and then connected to the positive terminal of the constant voltage LED lamp through the positive output terminal of the controller's constant voltage power supply. The negative terminal of the constant voltage LED lamp is connected to the negative output terminal of the constant voltage LED lamp transformer T2 through the negative output terminal of the constant voltage power supply. The control terminal of the constant voltage LED lamp is connected to the signal control line output terminal of the controller through a signal control line. The control module is used to set preset detection voltage V, preset voltage value Vi, preset voltage value Vc, preset current value Ai, and mode parameter values ​​for the constant voltage LED lamp lighting parameter mode, and to control the opening and closing of constant current LED lamp switch S1, constant current LED lamp detection switch Sr, and constant voltage LED lamp switch S2; it is also used to detect the closed state of constant current LED lamp switch S1 when the constant current LED lamp is powered on, detect the voltage value Vr of the measuring resistor R, match it with the preset voltage value Vi, and control the constant current LED lamp power supply output control circuit to output the current value Ai corresponding to the voltage value Vi to power the constant current LED lamp; it is also used to detect the closed state of constant voltage LED lamp switch S2 when the constant voltage LED lamp is powered on, detect the mode parameter value of the lighting parameter mode, output the lighting parameter mode corresponding to the detected lighting parameter mode value, and control the constant voltage LED lamp power supply output control circuit to output the preset voltage value Vc to power the constant voltage LED lamp; When the constant current LED is powered on, the control module controls the constant current LED switch S1 to close and detects whether the constant current LED switch S1 is closed. If it is, the control module provides a preset detection voltage V. This preset detection voltage V is insufficient to light up the entire constant current LED. The control module detects the voltage value Vr of the measuring resistor R and matches the voltage value Vr with the preset voltage value Vi set by the control module. When Vr = Vi, the control module controls the constant current LED transformer T1 to output the output current value Ai corresponding to the voltage value Vi to power the constant current LED and saves the current value Ai. The control module then controls the constant current LED detection switch Sr to close and lights up the constant current LED. Each time the constant current LED is lit, the current output current value Ai is saved. If the identification resistor Rx is damaged, the constant current LED is lit directly according to the previously saved current value Ai. When the constant voltage LED lamp is powered on, the control module controls the constant voltage LED lamp switch S2 to close and detects whether the constant voltage LED lamp switch S2 is closed. If it is closed, the control module detects the mode parameter value of the lighting parameter mode, outputs the lighting parameter mode corresponding to the detected lighting parameter mode value, and controls the constant voltage LED transformer T2 to output the preset voltage value Vc to power the constant voltage LED lamp and light it up.

2. The freezer LED light control device as described in claim 1, characterized in that, The identification resistor Rx of constant current LED light strips with the same input current but different specifications connected in parallel has the same resistance value.

3. The freezer LED light control device as described in claim 1, characterized in that, The preset voltage value Vi corresponds one-to-one with the operating current of the constant current LED lamp, and the preset current value Ai is equal to the operating current of the constant current LED lamp; the constant voltage LED lamp lighting parameter modes include constant light mode, breathing light mode, light flashing mode, color changing mode, and running light mode. Each mode corresponds to a mode parameter, and the mode parameter values ​​are different for different modes. The preset voltage value Vc is equal to the operating voltage of the constant voltage LED lamp.

4. The freezer LED light control device as described in any one of claims 1 to 3, characterized in that, It also includes a photosensitive control circuit, which includes a photosensitive sensor located outside the controller, a first photosensitive switch S3 and a second photosensitive switch S4 located inside the controller. The positive terminal of the photosensitive sensor is connected to the positive output terminal of the constant voltage LED transformer T2, and the negative terminal of the photosensitive sensor is connected to the negative output terminal of the constant voltage LED transformer T2. The signal terminal of the photosensitive sensor is connected to the signal transmission line terminal of the controller through a signal transmission line. The signal transmission line terminal is connected to the negative output terminals of the constant current LED transformer T1 and the constant voltage LED transformer T2, respectively. The first photosensitive switch S3 is connected between the negative output terminal of the constant current LED transformer T1 and the negative output terminal of the constant current power supply of the controller 3. The second photosensitive switch S4 is connected between the negative output terminal of the constant voltage LED transformer T2 and the negative output terminal of the constant voltage power supply of the controller 3.

5. A method for controlling LED lights in a freezer, employing the LED light control device for a freezer as described in claim 4, characterized in that, The specific steps are as follows: When the constant current LED light is powered on, the control module controls the constant current LED light switch S1 to close and detects whether the constant current LED light switch S1 is closed. If it is closed, the control module controls whether the first photosensitive switch S3 is closed based on the photosensitive value detected by the photoresistor, indicating whether it is bright or dark, and detects whether the first photosensitive switch S3 is closed. If it is closed, the control module applies a preset detection voltage V, which is insufficient to light up the entire constant current LED light. The control module detects the voltage value Vr of the measuring resistor R and compares the voltage value Vr with the preset voltage value set by the control module. When Vi is matched, and Vr = Vi, the control module controls the constant current LED lamp transformer T1 to output the current value Ai corresponding to the voltage value Vi, which supplies power to the constant current LED lamp and saves the current value Ai. The control module then controls the constant current LED lamp detection switch Sr to close, lighting up the constant current LED lamp. Each time the constant current LED lamp is lit, the current output current value Ai is saved. If the identification resistor Rx is damaged, the constant current LED lamp is lit directly according to the previously saved current value Ai. If the first photosensitive switch S3 is not closed, the constant current LED lamp is off. When the constant voltage LED is powered on, the control module controls the constant voltage LED switch S2 to close and detects whether the constant voltage LED switch S2 is closed. If it is closed, the control module controls whether the second photosensitive switch S4 is closed based on the photosensitive value detected by the photoresistor, indicating whether it is bright or dark, and detects whether the second photosensitive switch S4 is closed. If it is closed, the control module detects the mode parameter value of the lighting parameter mode, outputs the lighting parameter mode corresponding to the detected lighting parameter mode value, and controls the constant voltage LED transformer T2 to output the preset voltage value Vc to power the constant voltage LED, thus lighting up the constant voltage LED.

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