CN110686459B - Door opening and closing signal detection structure and method and refrigerator - Google Patents
Door opening and closing signal detection structure and method and refrigerator Download PDFInfo
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- CN110686459B CN110686459B CN201910827810.7A CN201910827810A CN110686459B CN 110686459 B CN110686459 B CN 110686459B CN 201910827810 A CN201910827810 A CN 201910827810A CN 110686459 B CN110686459 B CN 110686459B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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Abstract
The invention provides a door opening and closing signal detection structure, a door opening and closing signal detection method and a refrigerator, wherein a refrigerator door on the refrigerator is arranged on one side of a refrigerating chamber through the door opening and closing signal detection structure, the door opening and closing signal detection structure is provided with a grating plate connected with the refrigerator door, and a light source assembly and a photosensitive element which are arranged on two sides of the grating plate, and the light source assembly emits light to irradiate the photosensitive element through the grating plate so that the photosensitive element generates induced current; when the refrigerator door opens and closes, the grating plate moves with the refrigerator door, and the induction current generated by the photosensitive element changes. The door opening and closing signal detection structure provided by the invention can achieve the purpose of controlling the movement of the door by converting the movement information of the door into the electric signal of the induced current and feeding back the electric signal to the main control chip to generate the control information, and solves the problems that in the prior art, the door body and the structural parts are damaged or the safety accident is caused by the fact that the door still executes the original movement direction under the condition of the obstruction of an obstacle.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to a door opening and closing signal detection structure and method and a refrigerator.
Background
With the popularization of intellectualization of refrigerators, automatic door opening of refrigerators has become a trend of user interaction experience: when a user holds food or dishes in the hands, the refrigerator can automatically open the door by receiving voice information or sensing motion information and limb information, so that the user can conveniently take the articles in the refrigerator or put the articles in the refrigerator when the user does not conveniently open the door.
However, in the conventional automatic door opening interaction method of the refrigerator, there are the following problems: when the opening and closing path of the refrigerator door collides with an obstacle or a human body, the refrigerator door does not stop or move reversely to avoid the obstacle, but continues to work according to the original opening and closing mode, so that people near the refrigerator door can be injured to cause safety problems, and the refrigerator door driving part can be damaged. How to avoid the potential safety hazard when the refrigerator door is automatically opened and closed becomes a problem to be solved in the industry.
Disclosure of Invention
In order to solve the problem that in the prior art, a refrigerator door does not stop or reversely move to avoid an obstacle when being bumped against the obstacle or a human body in the automatic opening and closing process, the invention provides a door opening and closing signal detection structure which is used for converting motion information of a door body into a current signal, feeding back the current signal to a driving motor to change the motion of the door body, and simultaneously provides a door opening and closing signal detection method and a refrigerator applying the door opening and closing signal detection structure.
The invention is realized by the following technical scheme:
a door opening and closing signal detection structure, comprising: the door body wobbling door shaft gear, drive door shaft gear rotatory driving motor and control driving motor's main control chip, switch door signal detection structure still includes coding structure, coding structure includes:
the door shaft gear comprises a light source assembly used for emitting light, a grating plate connected with the door shaft gear, a photosensitive element used for receiving illumination to generate induced current, and a code output spring sheet used for encoding the induced current to generate control information;
the light source component and the coding output shrapnel are arranged on two sides of the grating plate, and the photosensitive element is arranged on the coding output shrapnel and faces the grating plate;
the door spindle gear drives the grating plate to rotate, the light source component emits light to irradiate the photosensitive element through the grating plate, and induced current generated by the photosensitive element is encoded by the encoding output spring plate and then sent to the main control chip.
The door opening and closing signal detection structure, wherein the coding structure further comprises: a housing mounted on the code output spring and an encoder shaft penetrating and mounted on the housing;
the light source component is arranged on the housing, and the light source component emits light to the interior of the housing;
the grating plate is mounted in the housing and on the encoder shaft;
the photosensitive element is positioned in the housing, and the coding output spring plate seals the housing.
The door opening and closing signal detection structure comprises a notch positioned at one side of the housing and a coding gear arranged at one end of the encoder shaft exposed out of the housing;
the cover shell is abutted to the mounting shaft of the door shaft gear through the notch, and the coding gear is meshed with the door shaft gear to drive the grating plate to rotate.
The switch door signal detection structure comprises a light source assembly and a lens, wherein the light source assembly comprises a light piece and a lens, the light piece is electrified to emit light and emits outwards after passing through the lens, and the lens refracts the light emitted by the light piece to form parallel light.
The door opening and closing signal detection structure, wherein the grating plate comprises: the grating plate comprises zero holes and gratings distributed along the edges of the grating plate and positioned outside the zero holes;
the photosensitive element comprises a sensor for receiving light to generate induced current: the optical grating comprises a zero position sensor, a first sensor and a second sensor, wherein the zero position sensor receives illumination through the zero position hole, and the first sensor and the second sensor receive illumination through the optical grating.
The door opening and closing signal detection structure comprises a plurality of reduction gears, and the driving motor drives the door shaft gear to rotate through the reduction gears.
The door opening and closing signal detection method is realized based on the door opening and closing signal detection structure described in any one of the above, and comprises the following steps:
the driving motor drives the door shaft gear to rotate so as to drive the grating plate to rotate;
the light source component emits light to irradiate the photosensitive element through the grating plate;
the photosensitive element receives illumination to generate induced current;
the coding output spring plate codes the induced current to generate control information and outputs the control information to the main control chip;
and the main control chip controls the driving motor according to the control information.
The method for detecting a door opening and closing signal, wherein the step of receiving light by the photosensitive element to generate an induced current includes:
the first sensor of the photosensitive element receives illumination to generate a first current signal;
a second sensor of the photosensitive element receives illumination to generate a second current signal;
the null sensor of the photosensitive element receives illumination to generate a third current signal.
The method for detecting the door opening and closing signal, wherein the encoding output spring encodes the induced current to generate control information and outputs the control information to the main control chip, comprises:
the coding output spring plate judges the rotation direction of the door shaft gear according to the phase difference of the first current signal and the second current signal;
and the coding output shrapnel judges whether the door shaft gear is static or rotating according to the period of the third current signal.
A refrigerator, comprising: the door opening and closing signal detection structure, the refrigerator door and the refrigerating chamber according to any one of the above, wherein the refrigerator door is installed on one side of the refrigerating chamber through a door shaft gear in the door opening and closing signal detection structure, and the driving motor drives the refrigerator door to open or close the refrigerating chamber.
The invention has the beneficial effects that:
in the switch door signal detection structure provided by the invention, light emitted by the photosensitive element irradiates the photosensitive element through the grating plate, so that the photosensitive element generates induced current; the grating plate is connected with the door shaft gear, when the door on which the door shaft gear is arranged executes door opening, door closing or stopping actions, the door shaft gear can drive the grating plate to rotate or stop, when the grating plate moves, the light irradiated on the photosensitive element changes, and the induction current generated by the photosensitive element also changes;
according to the induction current generated by the photosensitive element, the motion information of the door provided with the door shaft gear can be judged, namely, the motion information of the door is converted into a current signal; the current signal is encoded to generate control information, and the control information is fed back and controlled to drive the motor, so that automatic adjustment of opening and closing the door can be realized, the door can be stopped in time or returned according to the original route when meeting the obstacle obstruction, and the problems that in the prior art, the door body and structural parts are damaged or crashed personnel cause safety accidents when the door still executes the original movement direction under the obstacle obstruction condition are solved.
Drawings
Fig. 1 is a schematic diagram of an internal structure of a door opening/closing signal detection structure according to the present invention;
FIG. 2 is a schematic diagram of an exploded view of a door spindle gear and encoding structure according to the present invention;
FIG. 3 is a schematic diagram showing the positional relationship between a grating plate and a photosensitive element in the door opening/closing signal detection structure according to the present invention;
FIG. 4 is a schematic representation of the current signal generated by the photosensor over time in accordance with the present invention;
FIG. 4a is a schematic representation of the current signal over time when the door is stopped with obstruction in the present invention;
FIG. 4b is a schematic representation of the current signal over time when the door is subjected to reverse thrust in accordance with the present invention;
FIG. 5 is a schematic flow chart of a door opening/closing signal detection method according to the present invention;
fig. 6 is a schematic perspective view of a refrigerator according to the present invention.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and more specific, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, a door opening/closing signal detecting structure 100 according to the present invention includes: the door comprises a door shaft gear 21 driving the door body to swing, a driving motor 22 connected with the door shaft gear 21 to drive the door shaft gear 21 to rotate, and a main control chip (not shown) connected with the driving motor 22 to control the driving motor 22. The main control chip controls the driving motor 22 to rotate forward, rotate reversely, stop or start, and the driving motor 22 drives the door shaft gear 21 to rotate, so that the door body arranged on the door shaft gear 21 can realize automatic door opening and closing operations.
In one embodiment of the present invention, the door may be opened or closed by providing a door shaft on the door, and connecting the door shaft with the driving motor 22 through a track or a gear to enable the driving motor 22 to drive the door to open or close.
In one embodiment of the present invention, the output shaft of the driving motor 22 and the door shaft gear 21 are engaged through a set of reduction gears 23, the reduction gears 23 reduce the output power of the driving motor 22 to the door shaft gear 21, and the user increases or decreases the number of reduction gears 23 according to the rotation speed requirement of the door shaft gear 21, changing the opening and closing speed of the door mounted on the door shaft gear 21.
Referring to fig. 2, the door opening/closing signal detecting structure 100 further includes a coding structure 1, where the coding structure 1 includes: the door comprises a housing 11, an encoder shaft 12 penetrating and installed on the housing 11, and an encoding gear 120 installed on one end of the encoder shaft 12 exposed out of the housing 11, wherein the encoding gear 120 is meshed with the door shaft gear 21, and when the door is opened or closed, the door shaft gear 21 drives the encoding gear 120 to rotate when rotating.
The housing 11 is further provided with a coding output spring 13, the coding output spring 13 seals the housing 11, and the coding structure 1 further comprises a plurality of coding units which are all arranged inside the housing 11: a light source assembly 14 mounted on the housing 11 for emitting light, a grating plate 15 mounted on the encoder shaft 12 coaxially with the encoding gear 120, and a photosensitive element 16 mounted on the encoding output dome 13. The light source assembly 14 emits light to the inside of the housing 11, the light irradiates the photosensitive element 16 through the grating plate 15, the photosensitive element 16 receives the light to generate induced current, the code output spring 13 receives the induced current and codes the induced current to generate control information, the code output spring 13 is connected with the main control chip, and the code output spring 13 outputs the control information to the main control chip to control the driving motor 22.
In this embodiment, the door shaft gear 21 sequentially drives the encoding gear 120, the encoder shaft 12 and the grating plate 15 to rotate when rotating, and the light source assembly 14 emits light to irradiate the photosensitive element 16 through the grating plate 15, when the grating plate 15 rotates, the light intensity irradiated on the photosensitive element 16 will periodically change, and the induced current generated by the photosensitive element 16 will periodically change accordingly, so that the action information of the door shaft gear 21 (or door) is converted into an electrical signal, and the induced current is encoded to control the driving motor 22. The induced current is used for generating control information and feeding back the control information to the main control chip, so that the door can be prevented from timely stopping or reversely moving in the opening and closing process, and the problem that the door body part is damaged or hurts people due to the fact that the door still moves in the original moving direction after being prevented is avoided.
In this embodiment, the housing 11 is configured to cover the photosensitive element 16, and the photosensitive element 16 located in the housing 11 can only receive the illumination emitted by the light source assembly 14, and is not interfered by external light, so as to ensure the uniqueness and accuracy of the photosensitive element 16 receiving the illumination.
Referring to fig. 2, the light emitted by the light source assembly 14 is parallel light, and the parallel light propagates along only one direction during the propagation process, so that the intensity of illumination of the parallel light on a predetermined area is stronger than that of scattered light or spherical light, and the greater the intensity change of the induced current generated by the photosensitive element 16, the better the identification of the induced current by the code output spring 13. In a preferred embodiment of the present invention, the light source assembly 14 is composed of a light member 141 and a lens 142, the light emitted by the light member 141 is transmitted to the photosensitive element 16 after passing through the lens 142, the lens 142 refracts the light emitted by the light member 141 to form parallel light, and the lens 142 is used for refracting and adjusting the light emitted by the light member 141, so that the production and use cost of the light member 141 can be reduced, and the industrialized production of the light source assembly 14 is facilitated.
Referring to fig. 3, the photosensitive element 16 is mainly composed of three parts, namely, a first sensor 161, a second sensor 162 and a zero sensor 163, and the grating plate 15 also includes two light-transmitting parts: one is the grating 151 that is located grating board 15 border, takes the form of cyclic annular distribution and is located the zero position hole 152 of cyclic annular grating 151 one side, the light that light source module 14 sent is respectively sees through grating 151 with zero position hole 152 shines on photosensitive element 16, first sensor 161 with second sensor 162 passes through grating 151 receives light, zero position sensor 163 passes through zero position hole 152 receives light, there is the difference between the induced current that zero position sensor 163, first sensor 161 and second sensor 162 produced, the code output shell fragment 13 passes through different induced current and generates control information.
In this embodiment, the grating 151 is disposed on the grating plate 15 and has a plurality of hole structures arranged in a ring shape and equidistant, and the grating 151 continuously blocks, partially blocks and completely transmits light during rotation of the grating plate 15, so that the intensity of the light irradiated on the photosensitive element 16 varies periodically. Referring to fig. 4, at the same time, the different shielding degrees of the grating 151 on the first sensor 161 and the second sensor 162 will cause the difference between the induced currents generated by the first sensor 161 and the second sensor 162, and the induced currents are encoded according to the difference between the induced currents to generate the control information, and a specific encoding generation step will be specifically described in the "door opening and closing signal detection method" of the present invention.
Referring to fig. 2, in the above-mentioned structure, the conversion of the motion information of the door shaft gear 21 (or door) during rotation into the electric signal information of the induced current mainly depends on the rotation speed of the grating plate 15, and in daily use, the rotation angle rotation speed of the door shaft gear 21 is usually within 180 ° during opening and closing of the door, and the grating plate 15 often needs to rotate for several weeks to meet the requirement of the induced current encoding into the control information, so the transmission ratio of the door shaft gear 21 and the encoding gear 120 needs to be increased, the diameter of the encoding gear 120 is small and the door shaft gear 21 needs to be small, and in order to ensure that the encoding gear 120 can abut against the door shaft gear 21 to engage with the door shaft gear 21, the housing 11 needs to be as close to the installation shaft of the door shaft gear 21 as possible, therefore, a notch 110 is concavely formed in the housing 11 of the housing 11, the housing 11 abuts against the installation shaft of the door shaft gear 21 through the notch 110, the door shaft gear 21 engages with the encoding gear 120, and the door shaft gear 21 is guaranteed to drive the door shaft gear 21 to rotate the grating plate 15.
Referring to fig. 5, based on the above-mentioned door opening/closing signal detection structure 100, the present invention further provides a door opening/closing signal detection method, where the door opening/closing signal detection method includes the following steps:
s100, the driving motor 22 drives the door shaft gear 21 to rotate, so as to drive the grating plate 15 to rotate;
s200, the light source component 14 emits light to irradiate the photosensitive element 16 through the grating plate 15;
s300, the photosensitive element 16 receives illumination to generate the induction current;
s400, the code output spring 13 codes the induced current to generate control information and outputs the control information to the main control chip;
s500, the main control chip controls the driving motor 22 according to the control information.
The following specifically explains the steps of the door opening and closing signal detection method according to the present invention:
according to the door opening/closing signal detecting structure 100 of the present invention, the photosensor 16 includes the first sensor 161, the second sensor 162 and the zero sensor 163, so that in step S300, there are three induced currents generated after the photosensor 16 receives light, i.e., the first sensor 161 generates the first current signal, the second sensor 162 generates the second current signal, and the zero sensor 163 generates the third current signal.
The motion information of the door spindle gear 21 is determined according to different current signals generated by the photosensitive element 16, specifically:
referring to fig. 3 and 4, according to the door opening/closing signal detecting structure 100 of the present invention, the first sensor 161, the second sensor 162 or the zero sensor 163 receives light through the grating plate 15, and the rotation of the grating plate 15 causes the light intensity irradiated on the first sensor 161, the second sensor 162 or the zero sensor 163 to change periodically, so that the current generated by the first sensor 161, the second sensor 162 or the zero sensor 163 is a periodic current, and the periodic current generally has three properties: period, amplitude and phase.
Wherein, the first sensor 161 and the second sensor 162 collect light from the gratings 151 on the grating plate 15, and the gratings 151 are equidistantly arranged, so that the periods of the first current signal and the second current signal are the same; the grating 151 at the same time has different shielding degrees for the first sensor 161 and the second sensor 162, the first current signal and the second current signal are different in size and the same in period at the same time, and the first current signal and the second current signal are different in phase when the currents at the same time are different in size.
Taking an embodiment of the present invention as an example, when the door shaft gear 21 rotates to cause the door to perform a door opening operation, a phase difference between the first current signal and the second current signal is a positive value; when the door shaft gear 21 rotates to enable the door to perform a door closing action, the door shaft gear 21 drives the grating plate 15 to reversely rotate, and the phase difference between the first current signal and the second current signal is a negative value. Therefore, the rotation direction of the door-shaft gear 21 can be judged from the phase difference of the first current signal and the second current signal.
In one embodiment of the present invention, the grating plate 15 is provided with a zero hole 152, when the grating plate 15 rotates for one circle, the illumination received by the zero sensor 163 changes in one period, the third current signal passes through one period, if the third current signal does not detect a new current signal in one period, or a certain current value is continuous, it indicates that the grating plate 15 stops rotating at a certain moment, and the door-axis gear 21 is in a static state.
Thus, in step S400, the rotation direction of the door shaft gear 21 may be determined according to the phase difference between the first current signal and the second current signal, whether the door shaft gear 21 rotates may be determined according to the period of the third current signal, and in the encoding output spring 13, control information may be generated according to the changes of the first current signal, the second current signal and the third current signal, so as to achieve the purpose of generating an electrical signal according to the motion state of the door shaft gear 21 and feeding back the electrical signal to the main control chip.
Referring to fig. 4a, taking an embodiment of the present invention as an example, when the door is blocked by a person or object during the opening process, there are necessarily: the first current signal, the second current signal and the third current signal are kept at a certain constant value and are continuous. The code output spring 13 generates control information according to the current induced at this time, and the main control chip brakes or rotates the driving motor 22 reversely according to the control information.
Referring to fig. 4b, taking an embodiment of the present invention as an example, when the door is subjected to a force during the opening process, the door performs the closing action, there is necessarily: the phase difference between the first current signal and the second current signal is changed from a positive value to a negative value after the moment of stress. The code output spring 13 generates control information according to the current induced at this time, and the main control chip makes the driving motor 22 reversely rotate according to the control information, so that the door performs closing action.
In the above embodiment, only two implementations of encoding the induced current signal are needed, and in the practical application process, the relationship between the phase difference between the first current signal and the second current signal and the rotation direction or the number of zero holes 152 needs to be set according to the environment where the door opening/closing signal detecting structure 100 is applied.
Referring to fig. 6, based on the above door opening/closing signal detecting structure 100, the present invention proposes a refrigerator 200, where the refrigerator 200 includes: the door opening and closing signal detecting structure 100, the refrigerator door 201 and the refrigerating chamber 202, the refrigerator door 201 is installed at one side of the refrigerating chamber through the door shaft gear 21 in the door opening and closing signal detecting structure 100, and the driving motor 22 drives the refrigerator door 201 to open or close the refrigerating chamber 202.
The door opening and closing signal detection structure 100 is connected with the door shaft gear 21 and the coding structure 1, the grating plate 15 is driven to rotate in the rotating process of the door shaft gear 21, the light intensity received by the photosensitive element 16 changes, the generated induced current periodically changes, the coding structure 1 converts the rotating action information of the door shaft gear 21 into the generated electric signal of the photosensitive element 16, coding can be carried out according to the electric signal and the electric signal is fed back to the driving motor 22, when the door opening and closing signal detection structure 100 is applied to the refrigerator 200, the refrigerator door 201 can stop or change the original moving direction in time due to the blocking of obstacles in the opening and closing process, and the original moving direction can be changed according to the stressed direction after the stress effect. The problems that in the prior art, the refrigerator door 201 still moves according to the original execution route after impacting an obstacle in the automatic opening and closing process, and personnel are injured or components and connecting components in the refrigerator door 201 are damaged are avoided.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (7)
1. A door opening and closing signal detection structure, comprising: the door body swing door shaft gear, drive door shaft gear rotatory driving motor and control driving motor's main control chip, its characterized in that, switch door signal detection structure still includes coding structure, coding structure includes:
the door shaft gear comprises a light source assembly used for emitting light, a grating plate connected with the door shaft gear, a photosensitive element used for receiving illumination to generate induced current, and a code output spring sheet used for encoding the induced current to generate control information;
the light source component and the coding output shrapnel are arranged on two sides of the grating plate, and the photosensitive element is arranged on the coding output shrapnel and faces the grating plate;
the door shaft gear drives the grating plate to rotate, the light source component emits light to irradiate the photosensitive element through the grating plate, and induced current generated by the photosensitive element is encoded by the encoding output spring plate and then sent to the main control chip;
the grating plate includes: the grating plate comprises zero holes and gratings distributed along the edges of the grating plate and positioned outside the zero holes; the photosensitive element comprises a sensor for receiving light to generate induced current: the zero position sensor receives illumination through the zero position hole to generate a third current signal, and the first sensor and the second sensor receive illumination through the grating to generate a first current signal and a second current signal;
the first current signal, the second current signal and the third current signal are all periodic current signals; the coding output spring piece is used for judging the rotation direction of the door shaft gear according to the phase difference of the first current signal and the second current signal, and judging whether the door shaft gear is static or rotating according to the period of the third current signal.
2. The door opening and closing signal detection structure according to claim 1, wherein the encoding structure further comprises: a housing mounted on the code output spring and an encoder shaft penetrating and mounted on the housing;
the light source component is arranged on the housing, and the light source component emits light to the interior of the housing;
the grating plate is mounted in the housing and on the encoder shaft;
the photosensitive element is positioned in the housing, and the coding output spring plate seals the housing.
3. The door opening and closing signal detecting structure according to claim 2, wherein the encoding structure includes a notch at one side of the housing and an encoding gear installed at an end of the encoder shaft exposed outside the housing;
the cover shell is abutted to the mounting shaft of the door shaft gear through the notch, and the coding gear is meshed with the door shaft gear to drive the grating plate to rotate.
4. The door opening and closing signal detecting structure according to claim 1, wherein the light source assembly includes a lamp and a lens, the lamp emits light by being energized and emitted outward through the lens, and the lens refracts the light emitted from the lamp to form parallel light.
5. The door opening and closing signal detecting structure according to claim 1, wherein the door opening and closing signal detecting structure includes a plurality of reduction gears, and the driving motor drives the door shaft gear to rotate through the reduction gears.
6. A door opening and closing signal detection method, characterized in that the door opening and closing signal detection method is implemented based on the door opening and closing signal detection structure according to any one of the above claims 1 to 5, the door opening and closing signal detection method comprising:
the driving motor drives the door shaft gear to rotate so as to drive the grating plate to rotate;
the light source component emits light to irradiate the photosensitive element through the grating plate;
the photosensitive element receives illumination to generate induced current;
the coding output spring plate codes the induced current to generate control information and outputs the control information to the main control chip;
the main control chip controls the driving motor according to the control information;
the "the photosensitive element receives light to generate induced current" includes: the first sensor of the photosensitive element receives illumination to generate a first current signal; a second sensor of the photosensitive element receives illumination to generate a second current signal; the zero sensor of the photosensitive element receives illumination to generate a third current signal;
the "the encoding output shrapnel encodes the induced current to generate control information and outputs the control information to the main control chip" includes: the coding output spring plate judges the rotation direction of the door shaft gear according to the phase difference of the first current signal and the second current signal; and the coding output shrapnel judges whether the door shaft gear is static or rotating according to the period of the third current signal.
7. A refrigerator, the refrigerator comprising: the door opening and closing signal detecting structure, refrigerator door and refrigerating compartment as claimed in any one of claims 1 to 5, wherein the refrigerator door is installed at one side of the refrigerating compartment through a door shaft gear in the door opening and closing signal detecting structure, and the driving motor drives the refrigerator door to open or close the refrigerating compartment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910827810.7A CN110686459B (en) | 2019-09-03 | 2019-09-03 | Door opening and closing signal detection structure and method and refrigerator |
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| CN201910827810.7A CN110686459B (en) | 2019-09-03 | 2019-09-03 | Door opening and closing signal detection structure and method and refrigerator |
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| CN114508882A (en) * | 2020-11-17 | 2022-05-17 | 海信（山东）冰箱有限公司 | A kind of refrigerator |
| CN114508880A (en) * | 2020-11-17 | 2022-05-17 | 海信（山东）冰箱有限公司 | A kind of refrigerator |
| CN114508881B (en) * | 2020-11-17 | 2023-12-12 | 海信冰箱有限公司 | Refrigerator with a refrigerator body |
| CN114541917B (en) * | 2022-02-11 | 2024-05-28 | 海信冰箱有限公司 | Refrigerator door opening and closing angle control method and refrigerator |
| CN114941923B (en) * | 2022-05-26 | 2024-08-06 | 合肥美的电冰箱有限公司 | Door body control method, electronic equipment, storage medium, chip and refrigeration equipment |
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| CN209214637U (en) * | 2018-08-31 | 2019-08-06 | 格鲁克（天津）工业科技有限公司 | A kind of encoder of measurable length and position |
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2019
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