Hidden range hood and control method thereof

Abstract

The invention discloses a hidden range hood and a control method thereof.The range hood comprises a machine shell and a smoke collecting cavity, the smoke collecting cavity is arranged on a lifting mechanism driven by a motor and can move along with the lifting mechanism to be stored or released by the machine shell, and the control method comprises the steps that the current of the motor is monitored, and when the current is larger than a corresponding current threshold value, the smoke collecting cavity is opened; and if yes, determining that the smoke collecting cavity is in a stuck state in the process of being stored or released. Therefore, the current of the motor is monitored, and when it is monitored that the current is larger than the corresponding current threshold value, it is considered that the smoke collection cavity is in a stuck state in the process of being stored or released. Furthermore, whether the smoke collecting cavity is stuck or not in the lifting process can be intelligently monitored, so that the hidden range hood can take some emergency treatment measures, a user can respond to emergency situations in time, the loss is reduced to the minimum, and the use safety of the range hood is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and in particular to a concealed range hood and a control method thereof. Background Art

[0002] Range hoods are essential appliances in modern kitchens, and their performance and safety are of great concern. Liftable range hoods, with their height-adjustable design, offer flexible adjustments to the distance between the air inlet and the fume source, tailored to cooking needs. This not only enhances fume extraction but also allows them to be hidden when not in use, saving space and enhancing the overall aesthetics of the kitchen. Consequently, they are popular with many consumers.

[0003] However, range hoods with a lift function present a serious safety hazard during actual use. When the lift assembly is operating, such as when closing the range hood, and the smoke chamber slides upward, if the operator's hand accidentally gets between the smoke chamber and the main unit, the smoke chamber can get caught in the main unit and cause injury. Summary of the Invention

[0004] The present invention provides a concealed range hood and a control method thereof, so as to solve the problem in the related art that the lifting range hood is easily stuck.

[0005] According to one aspect of the present invention, a concealed range hood and a control method thereof are provided. The range hood includes a housing and a smoke collection chamber. The smoke collection chamber is disposed on a lifting mechanism driven by a motor and can be received or released by the housing as the lifting mechanism moves. The method includes:

[0006] The current of the motor is monitored, and in response to the current being greater than a corresponding current threshold, it is determined that the smoke collecting chamber is in a stuck state during the process of being accommodated or released.

[0007] Optionally, before the step of monitoring the current of the motor and determining that the smoke collecting chamber is in a stuck state during the process of being stored or released in response to the current being greater than a corresponding current threshold, the method further includes:

[0008] determining lifting stroke information of the smoke collecting chamber in response to the smoke collecting chamber being in a corresponding target stroke section;

[0009] The current of the motor is monitored, and in response to the current being greater than a corresponding current threshold, it is determined that the smoke collection chamber is in a stuck state during the process of being stored or released; wherein the target travel section indicates that the smoke collection chamber has run to a travel section where stuck failures are more likely to occur.

[0010] Optionally, a Hall sensor is also provided on the motor.

[0011] Optionally, the step of determining the lifting stroke information of the smoke collecting chamber includes: determining the lifting stroke information by using the Hall sensor.

[0012] Optionally, the step of determining the lifting stroke information by the Hall sensor includes:

[0013] determining the number of operation steps of the motor based on the Hall sensor;

[0014] The lifting stroke information of the smoke collecting chamber is determined according to the number of operation steps.

[0015] Optionally, after the step of monitoring the current of the motor and determining that the smoke collecting chamber is in a stuck state during the process of being stored or released in response to the current being greater than a corresponding current threshold, the method further includes:

[0016] Controlling the motor to brake so as to stop the smoke collecting chamber from rising and falling; and / or feeding back corresponding jamming alarm information.

[0017] Optionally, the corresponding stuck alarm information fed back includes:

[0018] Based on the corresponding relationship between the different currents and the jamming types, corresponding jamming type alarm information is fed back in response to the magnitude of the current.

[0019] Optionally, based on different correspondences between the current and the jam type, feeding back corresponding jam type alarm information in response to the magnitude of the current includes:

[0020] When the current is greater than a first current threshold, it is determined that the smoke collecting chamber is in a hand-clamping state during the process of being stored or released, and a hand-clamping alarm message is fed back;

[0021] When the current is greater than a second current threshold, it is determined that the smoke collecting chamber is in an oil cup stuck state during the process of being stored or released, and an oil cup stuck alarm message is fed back.

[0022] Optionally, the smoke collecting chamber further comprises an air guide plate and an air guide plate anti-stuck device, wherein the air guide plate is openably and closably arranged on the smoke collecting chamber; the air guide plate anti-stuck device comprises: a raised portion located on a side surface of the air guide plate close to the smoke collecting chamber, a groove located on a side surface of the smoke collecting chamber close to the air guide plate, and a detection module;

[0023] The groove corresponds to the protrusion at the position of the smoke collecting chamber, so as to receive the protrusion when the air guide plate is in a closed state, so that the surface of the air guide plate tends to fit the surface of the smoke collecting chamber;

[0024] The detection module includes a signal transmitting module and a signal receiving module located on both sides of the groove, the signal transmitting module transmits a signal to the signal receiving module, and the corresponding signal is blocked and cut off after the protrusion is received in the groove;

[0025] Before monitoring the current of the motor and determining that the smoke collecting chamber is in a stuck state during the process of being stored or released in response to the current being greater than a corresponding current threshold, the method further includes:

[0026] In response to the result that the air guide plate is closed detected by the detection module, the motor is controlled to start.

[0027] According to another aspect of the present invention, a concealed range hood is provided, comprising a housing and a smoke collection chamber. The smoke collection chamber is arranged on a lifting mechanism driven by a motor and can be received or released by the housing as the lifting mechanism moves. The invention also includes a control module, which is used to execute any control method of the concealed range hood described in the present invention.

[0028] The technical solution of the embodiment of the present invention provides a control method for a concealed range hood, wherein the range hood includes a housing and a smoke collecting chamber, the smoke collecting chamber is arranged on a lifting mechanism driven by a motor, and can be received or released by the housing as the lifting mechanism moves, and the method includes: monitoring the current of the motor, and in response to the current being greater than the corresponding current threshold, determining that the smoke collecting chamber is in a stuck state during the process of being received or released. Thus, by monitoring the current of the motor, and when it is detected that the current is greater than the corresponding current threshold, it is considered that the smoke collecting chamber is in a stuck state during the process of being received or released. Furthermore, it is possible to intelligently monitor whether the smoke collecting chamber is stuck during the lifting process, so that the concealed range hood can take some emergency treatment measures, and the user can respond to emergencies in a timely manner, minimize losses, and improve the safety of the range hood.

[0029] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is a schematic structural diagram of a concealed range hood according to an embodiment of the present invention;

[0032] Figure 2 Schematic diagram of the structure of the lifting mechanism of the concealed range hood proposed in an embodiment of the present invention;

[0033] Figure 3 This is a structural diagram of a lifting mechanism for a concealed range hood according to an embodiment of the present invention;

[0034] Figure 4 This is a structural diagram of a concealed range hood proposed in one embodiment of the present invention;

[0035] Figure 5 This is a flow chart of the control method of the concealed range hood proposed in an embodiment of the present invention.

[0036] Reference numerals: 101, housing; 102, smoke collecting chamber; 103, motor; 105, control module; 106, air guide plate; 107, raised portion; 108, groove; 109, signal transmitting module; 110, signal receiving module; 300, oil cup. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0038] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] Figure 1 This is a schematic diagram of the structure of the hidden range hood proposed in an embodiment of the present invention. Figure 1 As shown, the range hood includes a housing 101 and a smoke collecting chamber 102. The smoke collecting chamber 102 is disposed on a lifting mechanism driven by a motor 103 and can be received or released by the housing 101 as the lifting mechanism moves. The method includes:

[0040] The current of the motor 103 is monitored, and in response to the current being greater than a corresponding current threshold, it is determined that the smoke collecting chamber 102 is in a stuck state during the process of being stored or released.

[0041] It should be noted that a centrifugal fan is provided in the housing 101, and the oil smoke intake port of the smoke collecting chamber 102 can be aligned with the location where the stove generates oil smoke. Then, when oil smoke is generated at this location, the centrifugal fan is turned on to suck the oil smoke out of the smoke collecting chamber 102, thereby achieving the basic function of the range hood.

[0042] In this embodiment, the housing 101 and the smoke collecting chamber 102 are connected by a lifting mechanism, so that the smoke collecting chamber 102 can be lowered and extended from the inside of the housing 101 when in use, and can be retracted into the inside of the housing 101 when not in use, thus saving space. Figure 2 FIG. 1 is a structural diagram of the lifting mechanism of the concealed range hood proposed in an embodiment of the present invention. Figure 2 As shown, the lifting mechanism includes a gear 301, a rack 302, and a motor 103. The motor 103 is fixed to the housing 101 and is in driving connection with the gear 301. The rack 302 is mounted on the smoke collection chamber 102 along the direction of its elevation. The gear 301 and rack 302 mesh with each other. When the motor 103 drives the gear 301 to rotate, the gear 301 drives the rack 302 to rise and fall, thereby driving the smoke collection chamber 102 to rise and fall.

[0043] In another embodiment, Figure 3 FIG. 1 is a structural diagram of a lifting mechanism of a concealed range hood according to another embodiment of the present invention. Figure 3 As shown, the lifting mechanism includes a slider 306, a slide rail 305, a lead screw 303, a nut 304, and a motor 103. The motor 103 is fixed to the housing 101 and is in driving connection with the lead screw 303. The lead screw 303 is disposed within the slide rail 305. The lead screw 303 is threadedly connected to the nut 304. The nut 304 is fixedly connected to the slider 306. The slider 306 is fixedly connected to the smoke collection chamber 102. The slide rail 305 is mounted on the housing 101 along the direction of the smoke collection chamber 102's lifting. The slider 306 and the slide rail 305 are slidably connected. When the motor 103 drives the lead screw 303 to rotate, the nut 304 rises and falls along the lead screw 303, thereby driving the slider 306 to rise and fall, and further driving the smoke collection chamber 102 to rise and fall. It should be noted that the lifting mechanism can also be other mechanical structures capable of achieving lifting in the art, all of which are within the scope of protection of the present invention.

[0044] The concealed range hood also includes a control module 105, which controls the motor 103 in the lifting mechanism. In one embodiment, when the control module 105 receives a signal to activate the centrifugal fan, it controls the motor 103 to release the smoke collection chamber 102 from the housing 101. When the control module 105 receives a signal to deactivate the centrifugal fan, it controls the motor 103 to retract the smoke collection chamber 102 into the housing 101.

[0045] When the control module 105 controls the smoke collecting chamber 102 to rise, if other objects appear between the smoke collecting chamber 102 and the housing 101, such as the operator's hand, or other stuck objects, the smoke collecting chamber 102 will drive these objects to continue to rise until they get stuck and cannot move. This will cause a jam between the smoke collecting chamber 102 and the housing 101, requiring disassembly for repair. If the jammed object is a human hand, there will be irreversible consequences. The same is true when the smoke collecting chamber 102 descends. In order to solve the above problem in the embodiment of the present invention, it is possible to determine whether the smoke collecting chamber 102 is stuck by detecting the current in the process of the motor 103 driving the smoke collecting chamber 102 to rise and fall.

[0046] It is understandable that the load of the motor 103 when the smoke collecting chamber 102 is normally raised and lowered is different from the load when the smoke collecting chamber 102 is raised and lowered after it is stuck, and the operation conditions per unit time will also change significantly. After the smoke collecting chamber 102 is stuck, the load becomes larger and the current of the motor 103 will become larger. Among them, the current of the motor 103 when the smoke collecting chamber 102 is normally raised and lowered can be stored in the control module 105 in advance as a normal current threshold, and used as a standard. When it is greater than the current threshold, it can be considered that an abnormality has occurred. Therefore, the control module 105 controls the lifting mechanism to control the lifting of the smoke collecting chamber 102, and can simultaneously detect the current of the motor 103. When the current of the motor 103 is less than the current threshold, it is normal, indicating that the smoke collecting chamber 102 has not been stuck. When the current of the motor 103 is greater than the current threshold, it indicates that the smoke collecting chamber 102 has been stuck. In this way, it is possible to intelligently identify whether a jam has occurred at the first time so that emergency measures can be taken.

[0047] Optionally, before the step of monitoring the current of the motor 103 and determining that the smoke collecting chamber 102 is in a stuck state during the process of being stored or released in response to the current being greater than a corresponding current threshold, the method further includes:

[0048] Determining lifting stroke information of the smoke collecting chamber 102 in response to the smoke collecting chamber 102 being in a corresponding target stroke section;

[0049] The current of the motor 103 is monitored. In response to the current being greater than the corresponding current threshold, it is determined that the smoke collecting chamber 102 is in a stuck state during the process of being stored or released. The target travel section indicates that the smoke collecting chamber 102 has run to a travel section where the stuck fault occurs most frequently.

[0050] Since the starting current of the motor 103 is generally greater than the current in an abnormal state, if the current is monitored and determined when the motor 103 starts, the current monitored at the time of motor 103 startup may be determined to be greater than the corresponding current threshold, thereby mistakenly determining that the smoke collection chamber 102 is in a stuck state. Therefore, it is necessary to monitor the current of the motor 103 after starting the motor 103 and determine whether the smoke collection chamber 102 is in a stuck state during the lifting process based on the monitored current.

[0051] In this embodiment of the present invention, the corresponding lifting stroke of the smoke collection chamber 102 during the startup of the motor 103 is preset in advance. Then, after the actual lifting stroke of the smoke collection chamber 102 exceeds the corresponding pre-set lifting stroke, that is, after the smoke collection chamber 102 is within the corresponding target stroke section, the current of the motor 103 is monitored and combined with the corresponding current threshold to determine whether the smoke collection chamber 102 is in a stuck state during the storage or release process. This avoids misjudgment when the motor 103 is started.

[0052] Optionally, a Hall sensor is also provided on the motor 103 .

[0053] When the motor 103 is running, the Hall sensor can output a corresponding Hall signal, and the Hall signal can reflect the number of steps of the motor 103 running.

[0054] Optionally, the step of determining the lifting stroke information of the smoke collecting chamber 102 includes: determining the lifting stroke information by using a Hall sensor.

[0055] After the number of steps of the motor 103 is obtained through the Hall sensor, the stroke of the motor 103 can be calculated, that is, the stroke of the smoke collecting chamber 102 driven to rise and fall by the motor 103 can be obtained synchronously.

[0056] Optionally, the step of determining the lifting stroke information by using a Hall sensor includes:

[0057] Determine the number of running steps of the motor 103 based on the Hall sensor;

[0058] The lifting stroke information of the smoke collecting chamber 102 is determined according to the number of operation steps.

[0059] It is understandable that by adding a Hall sensor to the motor 103, and when the motor 103 is running, the number of running steps of the motor 103 is calculated based on the Hall signal of the Hall sensor, and then the lifting distance of the smoke collection chamber 102 is calculated based on the number of running steps of the motor 103. When the lifting distance of the smoke collection chamber 102 is greater than the preset starting distance, it can be considered that the smoke collection chamber 102 is in the target travel section. At this time, the current of the motor 103 can be monitored. In response to the current being greater than the corresponding current threshold, it is determined that the smoke collection chamber is in a stuck state during the process of being stored or released. This avoids misjudgment when the motor 103 is started.

[0060] In other embodiments, the target travel section, that is, the travel section where the smoke collecting chamber 102 is likely to get stuck, can also be obtained through several tests and pre-stored in the control module 105. In this way, when the lifting stroke of the smoke collecting chamber 102 enters the target travel section, the current of the motor 103 is monitored again, which can avoid misjudgment and save monitoring times.

[0061] Optionally, after the step of monitoring the current of the motor 103 and determining that the smoke collecting chamber 102 is in a stuck state during the process of being stored or released in response to the current being greater than a corresponding current threshold, the method further includes:

[0062] The motor 103 is controlled to brake to stop the smoke collecting chamber 102 from rising or falling; and / or, corresponding jamming alarm information is fed back.

[0063] That is, if the smoke collection chamber 102 is in the target travel range during its lifting process and the current of the motor 103 is detected to be greater than the corresponding current threshold, it can be considered that the smoke collection chamber 102 is in a stuck state. Then, it is necessary to control the motor 103 to stop the lifting of the smoke collection chamber 102 to prevent the stuck state of the smoke collection chamber 102 from further deepening. For example, if the smoke collection chamber 102 is stuck due to a finger being pinched, then the timely shutdown of the motor 103 will not cause secondary injury to the finger, and the situation can be handled in a timely manner to avoid more serious consequences.

[0064] In addition, in order to remind other users around that the smoke collecting chamber 102 is stuck, an alarm can be used to remind them when the smoke collecting chamber 102 is stuck. The corresponding alarm methods include: speaker, voice prompt, etc.

[0065] It should be noted that when the current of the motor 103 is detected to be greater than the corresponding current threshold, the motor 103 can be controlled to brake to stop the smoke collection chamber 102 from rising or falling; and a corresponding jam alarm message can be fed back, thereby forming a double insurance policy to prevent more serious situations. Alternatively, in other embodiments, one or the other can be selected. For example, if a finger is stuck in the smoke collection chamber 102, only the motor 103 can be controlled to brake. Alternatively, if another object is stuck in the smoke collection chamber 102, only the corresponding jam alarm message can be fed back to alert the user, allowing the user to pay attention or manually turn off the power.

[0066] Optionally, the corresponding stuck alarm information fed back includes:

[0067] Based on the corresponding relationship between different currents and jam types, corresponding jam type alarm information is fed back in response to the magnitude of the current.

[0068] It should be noted that during the lifting and lowering process of the smoke collecting chamber 102, a stuck state may occur due to different reasons, such as a finger being pinched, an oil cup being stuck, or other objects being stuck between the smoke collecting chamber 102 and the housing 101. Each stuck situation is different, so the current of the motor 103 when the smoke collecting chamber 102 is stuck is also different. In this way, when the current of the motor 103 when the smoke collecting chamber 102 is stuck is in the same range, it can be set as a stuck type. Then, various foreign objects can be used in advance to cause the smoke collecting chamber 102 to be stuck to conduct tests, and obtain the size correspondence between the stuck type and the current. Among them, the current range can be divided according to the test results, such as being divided into three corresponding stuck types by small current, medium current and large current. The smaller the current, the smaller the load of the stuck foreign object, and vice versa.

[0069] In this way, when the monitored current is less than the minimum current, a level one alarm can be issued; when the current is at the medium current, a level two alarm can be issued; and when the current is at the high current, a level three alarm can be issued. The intensity of the level one alarm is weaker than the level two alarm, and the intensity of the level two alarm is weaker than the level three alarm. For example, the level one alarm may sound the whistle twice for 2 seconds, the level two alarm may sound the whistle twice for 5 seconds, and the level three alarm may sound the whistle continuously.

[0070] Optionally, based on the correspondence between different currents and jam types, the corresponding jam type alarm information fed back in response to the current includes:

[0071] When the current is greater than the first current threshold, it is determined that the smoke collecting chamber 102 is in a hand-clamping state during the process of being stored or released, and a hand-clamping alarm message is fed back;

[0072] When the current is greater than the second current threshold, it is determined that the smoke collecting chamber 102 is in an oil cup stuck state during the process of being stored or released, and an oil cup stuck alarm message is fed back.

[0073] When the smoke collection chamber 102 is not stuck, the current of the motor 103 remains stable. When the current of the motor 103 is detected to be abnormal (i.e., the current jumps relative to the stable state), that is, when the current is greater than the minimum stuck threshold, the smoke collection chamber 102 is determined to be stuck. In order to provide feedback on the stuck alarm information, the stuck type can be determined based on the current range within which the current is located.

[0074] In this embodiment, the first current threshold and the second current threshold can be calibrated in advance through experiments, and these thresholds are pre-stored in the control module 105 in advance.

[0075] If the first current threshold is less than the second current threshold, the first current threshold serves as the minimum jam threshold. When the monitored current exceeds the first current threshold, the smoke collection chamber 102 is determined to be in a jammed state. Furthermore, if the current is less than the second current threshold, a finger jam condition is present, and a finger jam alarm is generated. If the current is greater than the second current threshold, an oil cup jam condition is present, and an oil cup jam alarm is generated.

[0076] In another embodiment, if the second current threshold is less than the first current threshold, the second current threshold serves as the minimum jam threshold. When the monitored current exceeds the second current threshold, the smoke collection chamber 102 is determined to be in a jam state. Furthermore, if the current is less than the first current threshold, the oil cup is jammed, and an oil cup jam alarm is generated. If the current is greater than the first current threshold, the hand is jammed, and a hand jam alarm is generated.

[0077] Continue to refer Figure 1 The oil cup 300 is located at the bottom of the smoke collecting chamber 102. When the smoke collecting chamber 102 begins to descend, the oil cup 300 may get stuck on the inner wall of the casing 101, preventing the smoke collecting chamber 102 from descending. When the smoke collecting chamber 102 rises to the point where the oil cup 300 can touch the casing 101, the oil cup 300 may get stuck on the bottom of the casing 101, preventing the smoke collecting chamber 102 from rising. When the oil cup 300 is stuck on the inner wall or bottom of the casing 101, the current of the motor 103 will suddenly increase. The increased current value can be stored in advance, and then during actual operation, if the current of the motor 103 is greater than the stored value, it means that the oil cup 103 is stuck.

[0078] During the rising process of the smoke collecting chamber 102, if a person's finger touches the smoke collecting chamber 102, it will be drawn into the casing 101 as the smoke collecting chamber 102 rises. At this time, the person may make a corresponding stress reaction and want to pull the finger out, which will generate a force that blocks the rising of the smoke collecting chamber 102, causing the smoke collecting chamber 102 to become stuck. Similarly, during the descent of the smoke collecting chamber 102, a person's finger may appear in the gap between the smoke collecting chamber 102 and the casing 101, causing the smoke collecting chamber 102 and the casing 101 to become stuck and unable to descend. When a person's finger is stuck between the smoke collecting chamber 102 and the casing 101, the current of click 103 will suddenly increase. Among them, the increased current value can be stored in advance, and then during actual operation, if the current of the motor 103 is greater than the stored value, it means that the finger is stuck.

[0079] In other examples, the air guide plate 106 may become stuck. For example, if the air guide plate 106 is not closed during the lifting of the smoke collecting chamber 102, it may block the lifting gap between the smoke collecting chamber 102 and the housing 101, making it impossible for the smoke collecting chamber 102 to be lifted normally.

[0080] It can be understood that since each type of jamming is different, the current of the corresponding motor 103 may be different. Therefore, the minimum current value corresponding to each type of jamming can be used as the current threshold. That is to say, as long as the current of the motor 103 is greater than the minimum current value, it is considered that a jam has occurred. Then, based on the current value corresponding to the corresponding jamming type that the current is actually greater than, the current type of jamming can be determined.

[0081] In one specific embodiment, as the smoke collection chamber 102 rises from the bottom to the top, the motor 103 continues to operate, and the Hall effect sensor continuously monitors and sends signals to the control module 105. The control module 105 determines the total number of steps the smoke collection chamber 102 has ascended, which is a, based on the number of signals transmitted by the Hall effect sensor. However, actual measurements indicate that the smoke collection chamber 102 faces a risk of getting stuck or pinching hands after ascending b steps. Based on this, the range of strokes ab where the smoke collection chamber 102 is prone to problems during its ascent is calculated. Current monitoring equipment has previously measured the current ranges x and y for hand pinching and oil cup jamming. As the smoke collection chamber 102 moves upward, the motor current sensor on the control module 105 continuously monitors changes in the motor current. Because the starting current of the motor 103 is typically greater than x and y, it is not possible to directly configure the control module 105 to stop the motor when the current exceeds x and y. This would prevent the motor 103 from starting and the smoke collection chamber 102 from ascending. At this time, the information sent by the Hall sensor is combined to assist in the judgment that when the smoke collection chamber 102 rises, the Hall sensor starts to send a signal to the control module 105. When the control module 105 recognizes that the smoke collection chamber 102 has risen to ab, it is determined that the smoke collection chamber 102 has entered the stroke that is easy to pinch hands and easy to get stuck. Then, the current detection synchronously feeds back the detected current information to the control module 105. When the current size recognized by the control module 105 is greater than the smaller of x and y within the stroke, the control module 105 will determine that pinching hands or getting stuck has occurred. At this time, the control module 105 stops the lifting motor 103 from running upward to avoid safety problems caused by the continuous upward pulling of the smoke collection chamber 102.

[0082] It should be noted that in this embodiment, two sets of experiments were conducted in advance, namely the experiments on oil cup jamming and hand pinching. Since the values of x and y are uncertain during the experiment, after the measurement, the smaller of x and y is used as the standard and stored in the control module 105 to determine whether the smoke collection chamber 102 is jammed, and x and y are stored at the same time to make a corresponding judgment on the jamming type.

[0083] Optionally, Figure 4 FIG. 1 is a schematic diagram of the structure of a concealed range hood according to an embodiment of the present invention. Figure 4 As shown, the smoke collecting chamber 102 further includes an air deflector 106 and an air deflector anti-stuck device. The air deflector 106 is openably and closably arranged on the smoke collecting chamber 102. The air deflector anti-stuck device includes: a raised portion 107 located on a side surface of the air deflector 106 close to the smoke collecting chamber 102, a groove 108 located on a side surface of the smoke collecting chamber 102 close to the air deflector 106, and a detection module.

[0084] The position of the groove 108 in the smoke collecting chamber 102 corresponds to the protrusion 107, so as to receive the protrusion 107 when the air guide plate 106 is in the closed state, so that the surface of the air guide plate 106 tends to fit the surface of the smoke collecting chamber 102;

[0085] The detection module includes a signal transmitting module 109 and a signal receiving module 110 located on both sides of the groove 108. The signal transmitting module 109 transmits a signal to the signal receiving module 110. The corresponding signal is blocked and cut off after the protrusion 107 is received in the groove 108.

[0086] The current of the motor 103 is monitored, and in response to the current being greater than a corresponding current threshold, it is determined that the smoke collecting chamber 102 is in a stuck state during the process of being stored or released, and the method further includes:

[0087] In response to the result that the air guide plate 106 is closed detected by the detection module, the motor 103 is controlled to start.

[0088] It is understood that an air deflector 106 is provided on the surface of the smoke collection chamber 102. When the smoke collection chamber 102 is collecting smoke, the air deflector 106 is opened to direct the oil smoke into the smoke collection chamber 102. Before or after the smoke collection chamber 102 begins collecting smoke, the smoke collection chamber 102 needs to be raised or lowered. Before raising or lowering the smoke collection chamber 102, the air deflector 106 needs to be closed on the surface of the smoke collection chamber 102 to prevent it from getting stuck between the smoke collection chamber 102 and the housing 101, which could cause the range hood to malfunction.

[0089] Therefore, before the smoke collecting chamber 102 is raised or lowered, or even during the raising or lowering process of the smoke collecting chamber 102 , a detection module is required to detect whether the air guide plate 106 is closed on the surface of the smoke collecting chamber 102 , so as to improve the intelligence of the range hood.

[0090] Furthermore, in order to ensure that the air guide plate 106 can be closed tightly and tend to fit the surface of the smoke collecting chamber 102, an embodiment of the present invention provides a protrusion 107 on the surface of the side of the air guide plate 106 close to the smoke collecting chamber 102, and a groove 108 is provided on the surface of the side of the smoke collecting chamber 102 close to the air guide plate 106. The protrusion 107 and the groove 108 can be aligned, and when the air guide plate 106 is closed, the protrusion 107 just extends into the groove 108.

[0091] In addition, in order to detect whether the air deflector 106 is closed, a signal transmitting module 109 and a signal receiving module 110 are provided on both side walls of the groove 108, and the signal transmitting module 109 continuously transmits a signal to the signal receiving module 110. When the air deflector 106 is closed, the protrusion 107 will cut off the signal transmitted by the signal transmitting module 109, that is, it blocks the signal receiving module 110 from receiving the signal transmitted by the signal transmitting module 109. Furthermore, when the signal receiving module 110 cannot receive the signal transmitted by the signal transmitting module 109, it is considered that the air deflector 106 is closed on the surface of the smoke collecting chamber 102. Afterwards, the control module 105 can control the motor 103 to drive the smoke collecting chamber 102 to rise and fall. In this way, the jamming phenomenon caused by the air deflector 106 not being closed during the lifting and lowering process of the smoke collecting chamber 102 can be avoided.

[0092] Among them, a square sheet metal protrudes from the air deflector 106 (i.e., the aforementioned protrusion 107), and then a square groove 108 is recessed in the smoke collecting chamber 102 at the corresponding position to accommodate the protrusion on the air deflector 106. Then, an infrared transmitter is installed above the groove 108 of the smoke collecting chamber 102 to continuously transmit signals at a frequency of 500MS, and an infrared receiver is installed below the groove 108 of the smoke collecting chamber 102 to continuously receive signals and feed them back to the control module 105. When the control module 105 receives signals all the time, it determines that the air guide plate 106 is not closed properly. When the air guide plate 106 is closed, the raised square on the air guide plate 106 completely blocks the groove 108 on the smoke collecting chamber 102. At this time, the signal emitted by the infrared emitting device is completely blocked, and no signal is received at the receiving end to be fed back to the control module 105. At this time, the control module 105 determines that the air guide plate 106 is not completely closed, and prohibits the smoke collecting chamber 102 from being raised or lowered, thereby effectively avoiding the problem of the air guide plate 106 being stuck due to the air guide plate 106 not being completely closed.

[0093] In a specific embodiment, Figure 5 As shown, the control method includes:

[0094] S101, in response to a detection module detecting that the air deflector is closed, controlling the motor to start;

[0095] S102, determining the lifting stroke information of the smoke collecting chamber, in response to the smoke collecting chamber being in a corresponding target stroke section;

[0096] S103, monitoring the current of the motor, and in response to the current being greater than a corresponding current threshold, determining that the smoke collecting chamber is in a stuck state during the process of being stored or released;

[0097] S104: Control the motor to brake to stop the smoke collecting chamber from rising and falling; and / or feedback corresponding jam alarm information.

[0098] According to another aspect of the present invention, a hidden range hood is provided. Figure 1 As shown, it includes a casing 101 and a smoke collecting chamber 102. The smoke collecting chamber 102 is set on a lifting mechanism driven by a motor 103 and can be received or released by the casing 101 as the lifting mechanism moves. It also includes a control module 105. The control module 105 is used to execute the control method of the hidden range hood of any embodiment of the present invention.

[0099] In summary, the technical solution of the embodiment of the present invention provides a concealed range hood and a control method thereof, wherein the range hood includes a housing and a smoke collecting chamber, and the smoke collecting chamber is arranged on a lifting mechanism driven by a motor, and can be received or released by the housing as the lifting mechanism moves. The method includes: monitoring the current of the motor, and in response to the current being greater than the corresponding current threshold, determining that the smoke collecting chamber is in a stuck state during the process of being received or released. Thus, by monitoring the current of the motor, and when it is detected that the current is greater than the corresponding current threshold, it is considered that the smoke collecting chamber is in a stuck state during the process of being received or released. Furthermore, it is possible to intelligently monitor whether the smoke collecting chamber is stuck during the lifting process, so that the concealed range hood can take some emergency measures, and the user can respond to emergencies in a timely manner, minimize losses, and improve the safety of the range hood.

[0100] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0101] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A control method for a concealed range hood, characterized in that: The range hood includes a housing and a smoke collecting chamber. The smoke collecting chamber is disposed on a lifting mechanism driven by a motor and can be received or released by the housing as the lifting mechanism moves. The method includes: The current of the motor is monitored, and in response to the current being greater than a corresponding current threshold, it is determined that the smoke collecting chamber is in a stuck state during the process of being accommodated or released.

2. The control method of the concealed range hood according to claim 1, characterized in that: Before the step of monitoring the current of the motor and, in response to the current being greater than a corresponding current threshold, determining that the smoke collecting chamber is in a stuck state during the process of being stored or released, the method further includes: determining lifting stroke information of the smoke collecting chamber in response to the smoke collecting chamber being in a corresponding target stroke section; The current of the motor is monitored, and in response to the current being greater than a corresponding current threshold, it is determined that the smoke collection chamber is in a stuck state during the process of being stored or released; wherein the target travel section indicates that the smoke collection chamber has run to a travel section where stuck failures are more likely to occur.

3. The control method of the concealed range hood according to claim 2, characterized in that: The motor is also provided with a Hall sensor.

4. The control method of the concealed range hood according to claim 3, characterized in that: The step of determining the lifting stroke information of the smoke collecting chamber includes: determining the lifting stroke information by using the Hall sensor.

5. The control method of the concealed range hood according to claim 4, characterized in that: The step of determining the lifting stroke information by the Hall sensor includes: determining the number of operation steps of the motor based on the Hall sensor; The lifting stroke information of the smoke collecting chamber is determined according to the number of operation steps.

6. The control method of a concealed range hood according to any one of claims 1 to 5, characterized in that: After the step of monitoring the current of the motor and determining that the smoke collecting chamber is in a stuck state during the process of being stored or released in response to the current being greater than a corresponding current threshold, the method further includes: Controlling the motor to brake so as to stop the smoke collecting chamber from rising and falling; and / or feeding back corresponding jamming alarm information.

7. The control method of the concealed range hood according to claim 6, characterized in that: The corresponding stuck alarm information feedback includes: Based on the corresponding relationship between the different currents and the jamming types, corresponding jamming type alarm information is fed back in response to the magnitude of the current.

8. The control method of the concealed range hood according to claim 7, characterized in that: Based on the corresponding relationship between the current and the jam type, the corresponding jam type alarm information fed back in response to the current includes: When the current is greater than a first current threshold, it is determined that the smoke collecting chamber is in a hand-clamping state during the process of being stored or released, and a hand-clamping alarm message is fed back; When the current is greater than a second current threshold, it is determined that the smoke collecting chamber is in an oil cup stuck state during the process of being stored or released, and an oil cup stuck alarm message is fed back.

9. The control method of a concealed range hood according to claim 1, characterized in that: The smoke collecting chamber further includes an air guide plate and an air guide plate anti-stuck device, wherein the air guide plate is openably and closably arranged on the smoke collecting chamber; the air guide plate anti-stuck device includes: a raised portion located on a side surface of the air guide plate close to the smoke collecting chamber, a groove located on a side surface of the smoke collecting chamber close to the air guide plate, and a detection module; The groove corresponds to the protrusion at the position of the smoke collecting chamber, so as to receive the protrusion when the air guide plate is in a closed state, so that the surface of the air guide plate tends to fit the surface of the smoke collecting chamber; The detection module includes a signal transmitting module and a signal receiving module located on both sides of the groove, the signal transmitting module transmits a signal to the signal receiving module, and the corresponding signal is blocked and cut off after the protrusion is received in the groove; Before monitoring the current of the motor and determining that the smoke collecting chamber is in a stuck state during the process of being stored or released in response to the current being greater than a corresponding current threshold, the method further includes: In response to the result that the air guide plate is closed detected by the detection module, the motor is controlled to start.

10. A concealed range hood, characterized in that: It includes a casing and a smoke collection chamber, wherein the smoke collection chamber is arranged on a lifting mechanism driven by a motor and can be received or released by the casing as the lifting mechanism moves. It also includes a control module, which is used to execute the control method of the hidden range hood as described in any one of claims 1 to 9.

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