Light push door closing control method for drawer refrigerator

Abstract

The invention discloses a light push door closing control method for a drawer refrigerator, which comprises the following steps: S1, after a drawer is pulled out of a box body for a distance D and stops for T1, a photoelectric sensor works; s2, the drawer moves to trigger a photoelectric sensor to generate a high-low level change signal, and the time T2 is counted after the high-low level change signal is received; s3, detecting the number of continuous effective signals in the high and low level change signals within the T2 time, and calculating the number n of the effective signals through a grating signal counter; s4, when the counting n of the grating signal counter is larger than N, the motor assembly is controlled to drive the drawer to be closed, the grating signal counter is reset, the photoelectric sensor stops working, and the step S1 is executed again; when the counting n of the grating signal counter is smaller than or equal to N, the grating signal counter is reset, and the process returns to S2, the drawer is controlled to be automatically closed by detecting continuous effective signals in high and low level change signals of the photoelectric sensor, abnormal signals generated under the shaking condition of the drawer can be filtered, and the detection accuracy of slightly pushing the drawer by a user is improved.

Description

[Technical field]

[0001] The present invention relates to the field of vehicle-mounted refrigerators, and in particular to a method for controlling the gentle push and close of a drawer refrigerator door. [Background Technology]

[0002] With the development of intelligent refrigerators, automatic door opening and closing has become a trend in user interaction experience. This is especially true for car-mounted drawer refrigerators, where users are generally accustomed to triggering the automatic closing of the refrigerator drawer by gently pushing it. However, as shown in patent application number 202420961135.3, which discloses a rope-type car refrigerator using a photoelectric sensor, the automatic closing of the car refrigerator drawer is triggered when the car vibrates while driving. This leads to low accuracy in detecting the push of the car refrigerator drawer and a poor user experience. [Summary of the invention]

[0003] The present invention overcomes the shortcomings of the prior art and provides a drawer refrigerator push-door closing control method that controls the automatic closing of a drawer by detecting a continuous valid signal in a high and low level change signal of a photoelectric sensor.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A drawer refrigerator push door closing control method, characterized by:

[0006] S1: After the drawer is pulled out of the cabinet by a distance D and stops for a period of time T1, the control module controls the photoelectric sensor to operate;

[0007] S2: The drawer movement triggers the photoelectric sensor to generate a high-low level change signal. The control module counts the time T2 after receiving the high-low level change signal.

[0008] S3, the control module detects the number of continuous valid signals in the high and low level change signals generated by the photoelectric sensor within the duration T2, and calculates the number of valid signals n through the grating signal counter; wherein, the judgment condition of the valid signal is t1 < the duration of the continuous high and low level change signal t < t2, and t2 < T2;

[0009] S4. When the grating signal counter counts n>N, the control module controls the motor assembly to drive the drawer to close, the grating signal counter is reset, the photoelectric sensor stops working, and returns to S1;

[0010] When the grating signal counter counts n≤N, the grating signal counter is cleared and returns to S2.

[0011] The method for controlling the gentle door closing of a drawer refrigerator as described above is characterized in that T2 is in the range of 1.4s<T2<1.6s.

[0012] The above-mentioned method for controlling the gentle closing of a drawer refrigerator is characterized in that: the range of t1 is 35ms<t1<45ms,

[0013] The above-mentioned method for controlling the gentle door closing of a drawer refrigerator is characterized in that the range of t2 is 195ms<t2<205ms.

[0014] The drawer refrigerator gentle push closing control method as described above is characterized in that: N is 1.

[0015] The above-mentioned method for controlling the gentle door closing of a drawer refrigerator is characterized in that the time length T1 is 2 seconds.

[0016] The above-mentioned method for controlling the gentle push closing of a drawer refrigerator is characterized in that: a storage cavity is provided in the cabinet, the drawer is movably inserted in the storage cavity, a photoelectric sensor is provided on the inner side of the storage cavity, a grating is provided on the outer side of the drawer, and after the drawer is pulled out of the cabinet a distance D, the grating moves to the photoelectric sensor.

[0017] The above-mentioned method for controlling the gentle push closing of a drawer refrigerator is characterized in that: a storage cavity is provided in the cabinet, the drawer is movably inserted in the storage cavity, a photoelectric sensor is provided on the outer side of the drawer, a grating is provided on the inner side of the storage cavity, and the photoelectric sensor moves to the grating after the drawer is pulled out a distance D from the cabinet.

[0018] The method for controlling the gentle door closing of a drawer refrigerator as described above is characterized in that when the grating blocks the photoelectric sensor, the photoelectric sensor generates a high-level signal; when the grating does not block the photoelectric sensor, the photoelectric sensor generates a low-level signal.

[0019] The above-mentioned method for controlling the gentle push closing of a drawer refrigerator is characterized in that the distance D is the maximum distance the drawer is pulled out from the refrigerator body.

[0020] The beneficial effects of the present invention are:

[0021] The present invention triggers the photoelectric sensor to generate high and low level change signals when the drawer is pushed. By detecting the number of continuous valid signals in the high and low level change signals generated by the photoelectric sensor within a period of time, and controlling the drawer to automatically close when the number of continuous valid signals is not less than a preset value, and clearing the number of continuous valid signals to zero and waiting for the next continuous valid signal number detection when the number of continuous valid signals is less than the preset value, the present invention can effectively filter out abnormal high and low level change signals generated by the drawer when it is shaken, thereby greatly improving the detection accuracy of the user gently pushing the drawer. [Brief Description of the Drawings]

[0022] Figure 1 This is a schematic diagram of the present invention;

[0023] Figure 2 A cross-sectional view of a drawer in a closed state according to one embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of a drawer in one embodiment of the present invention when it is pulled out to its maximum distance. [Specific implementation method]

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the descriptions of "preferred", "sub-preferred", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "preferred" or "sub-preferred" may explicitly or implicitly include at least one such feature.

[0027] like Figure 1 As shown, a drawer refrigerator push door closing control method includes:

[0028] S1: After the drawer is pulled out of the cabinet by a distance D and stops for a period of time T1, the control module controls the photoelectric sensor to operate;

[0029] In this case, distance D is the maximum distance the drawer can be pulled out from the cabinet, and duration T1 is 2 seconds. That is, the photoelectric sensor starts operating after the drawer is pulled out from the cabinet to the maximum open position and stops for S2.

[0030] S2, the drawer movement triggers the photoelectric sensor to generate a high-low level change signal. The control module counts the time T2 after receiving the high-low level change signal; where T2 is in the range of 1.4s<T2<1.6s;

[0031] In this case, T2 is set to 1.5 seconds. When the drawer is fully opened, the light barrier moves onto the photoelectric sensor. As the drawer moves, the light barrier and the photoelectric sensor move relative to each other, triggering the photoelectric sensor to generate a high-low level change signal. The control module then counts for 1.5 seconds after receiving the high-low level change signal.

[0032] S3. The control module detects the number of continuous valid signals in the high and low level change signals generated by the photoelectric sensor within the duration T2, and calculates the number of valid signals n through the grating signal counter; wherein, the judgment condition of the valid signal is t1 < continuous high and low level change signal duration t < t2, and t2 < T2, the range of t1 is 35ms < t1 < 45ms, and the range of t2 is 195ms < t2 < 205ms;

[0033] In this case, t1 is set to 40ms and t2 is set to 200ms. Therefore, the condition for determining a valid signal is that 40ms < the duration of the continuous high-low level change signal t < 200ms. In other words, the control module detects the number of consecutive valid signals in the high-low level change signals generated by the photoelectric sensor within 1.5 seconds, and the grating signal counter calculates the number of valid signals n.

[0034] For example, when the continuous high and low level change signals generated by the photoelectric sensor within 1.5s last for more than 250ms, according to the judgment conditions of the valid signal, the range of the first valid signal t1 is 0-200ms, and the range of the second continuous valid signal t2 is 200-250ms, that is, two consecutive valid signals are detected. At this time, the grating signal counter calculates the number of valid signals n as 2.

[0035] S4, the control module determines whether the grating signal counter count n is greater than N; wherein N is 1;

[0036] When the grating signal counter counts n>1, the control module controls the motor assembly to drive the drawer to close, the grating signal counter is reset, the photoelectric sensor stops working, and returns to S1, waiting for the next time the drawer is pulled out from the box to the maximum distance open position.

[0037] When the grating signal counter counts n≤1, the grating signal counter is cleared and returns to S2, waiting for the next drawer movement to trigger the photoelectric sensor to generate a high or low level change signal.

[0038] This case controls the automatic closing of the drawer by detecting whether there are two or more consecutive valid signals in the high and low level change signals generated by the photoelectric sensor within 1.5 seconds. It can effectively filter out abnormal high and low level change signals generated by the photoelectric sensor when the drawer is shaken, thereby improving the detection accuracy of the user gently pushing the drawer.

[0039] In this case, a storage cavity is provided in the body of the vehicle refrigerator, and a drawer is movably inserted into the storage cavity.

[0040] In this case, the photoelectric sensor and the grating arrangement may be implemented as follows: Figure 2-3As shown, the photoelectric sensor 3 is arranged on the inner side of the storage cavity 11, and the grating 4 is provided on the outer side of the drawer 2. When the drawer 2 is pulled out of the box 1 by a distance D, the grating 4 moves to the photoelectric sensor 3. That is, when the drawer is pulled out of the box, the grating moves outward with the box, and when the drawer is pulled out the maximum distance to the maximum open position, the grating moves to the photoelectric sensor.

[0041] In this case, the photoelectric sensor and light barrier can be implemented by installing the photoelectric sensor on the outer side of the drawer and the light barrier on the inner side of the storage cavity. When the drawer is pulled out of the box a distance D, the photoelectric sensor moves to the light barrier. That is, when the drawer is pulled out of the box, the photoelectric sensor moves outward with the box. When the drawer is pulled out to the maximum open position, the photoelectric sensor moves to the light barrier.

[0042] In this case, when the light barrier blocks the photoelectric sensor, it generates a high-level signal; when it does not, it generates a low-level signal. Therefore, when the drawer is pulled out to its maximum open position, the photoelectric sensor may be blocked by the light barrier, generating a high-level signal, or unblocked by the light barrier, generating a low-level signal. When the drawer is gently pushed, the light barrier and the photoelectric sensor move relative to each other, causing the sensor to generate alternating high and low-level signals, which are then sent to the control module for detection of valid signals.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A method for controlling the gentle closing of a drawer refrigerator, characterized in that: Including S1: After the drawer is pulled out of the cabinet by a distance D and stops for a period of time T1, the control module controls the photoelectric sensor to operate; S2: The drawer movement triggers the photoelectric sensor to generate a high-low level change signal. The control module counts the time T2 after receiving the high-low level change signal. S3, the control module detects the number of continuous valid signals in the high and low level change signals generated by the photoelectric sensor within the duration T2, and calculates the number of valid signals n through the grating signal counter; wherein, the judgment condition of the valid signal is t1 < the duration of the continuous high and low level change signal t < t2, and t2 < T2; S4. When the grating signal counter counts n>N, the control module controls the motor assembly to drive the drawer to close, the grating signal counter is reset, the photoelectric sensor stops working, and returns to S1; When the grating signal counter counts n≤N, the grating signal counter is cleared and returns to S2.

2. The drawer refrigerator gentle door closing control method according to claim 1, characterized in that: The range of T2 is 1.4s<T2<1.6s.

3. The drawer refrigerator gentle push closing control method according to claim 2, characterized in that: The range of t1 is 35ms<t1<45ms.

4. The drawer refrigerator gentle push closing control method according to claim 3, characterized in that: The range of t2 is 195ms<t2<205ms.

5. The drawer refrigerator gentle push closing control method according to claim 1, characterized in that: N is 1.

6. The drawer refrigerator gentle push closing control method according to claim 1, characterized in that: The duration T1 is 2S.

7. The drawer refrigerator gentle push closing control method according to claim 1, characterized in that: A storage cavity is provided in the box body, and a drawer is movably inserted in the storage cavity. A photoelectric sensor is provided on the inner side of the storage cavity, and a grating is provided on the outer side of the drawer. After the drawer is pulled out of the box body by a distance D, the grating moves to the photoelectric sensor.

8. The drawer refrigerator gentle push closing control method according to claim 1, characterized in that: A storage cavity is provided in the box body, and a drawer is movably inserted in the storage cavity. A photoelectric sensor is provided on the outer side of the drawer, and a grating is provided on the inner side of the storage cavity. After the drawer is pulled out of the box body by a distance D, the photoelectric sensor moves to the grating.

9. A drawer refrigerator gentle push door closing control method according to claim 7 or 8, characterized in that: When the light grating blocks the photoelectric sensor, the photoelectric sensor generates a high-level signal; when the light grating does not block the photoelectric sensor, the photoelectric sensor generates a low-level signal.

10. A drawer refrigerator gentle push door closing control method according to claim 1, 7 or 8, characterized in that: Distance D is the maximum distance the drawer can be pulled out from the cabinet.

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