Self-cleaning control method of check valve system, check valve system and cooking equipment

Abstract

The invention provides a self-cleaning control method of a check valve system, the check valve system and cooking equipment, and relates to the technical field of kitchen appliances. The invention provides a self-cleaning control method of a check valve system. The check valve system is used for cooking equipment. The check valve system comprises a pipe body, blades, a driving mechanism and a monitoring unit. The pipe body is provided with a smoke exhaust channel, the blades are arranged in the smoke exhaust channel, and the driving mechanism is used for driving the blades to rotate to open or close the smoke exhaust channel; the monitoring unit is used for detecting oil stain thickness on the blade surface; the control method comprises the steps of determining a to-be-cleaned state of a blade in response to a cleaning signal; the driving mechanism is controlled to drive the blades to rotate in a reciprocating mode, so that oil stains are thrown away from the blades, the effect of cleaning the oil stains on the blades is achieved, and long-term reliable operation, efficient smoke exhaust and user maintenance convenience of the check valve are achieved.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to a self-cleaning control method for a check valve system, a check valve system, and cooking equipment. Background Technology

[0002] As the core cooking equipment in modern kitchens, integrated cooktops play a crucial role in the cooking process by using check valves to prevent backflow of cooking fumes.

[0003] In related technologies, when a user activates the exhaust function of an integrated stove, the check valve's blades open the exhaust duct via airflow, expelling cooking fumes outdoors. When not in operation, the blades must close to prevent odors and foul air from the shared exhaust duct from flowing back into the kitchen. However, over long-term use, high-temperature cooking fumes adhere to the surface of the check valve blades, forming sticky grease upon cooling. This grease buildup can cause the blades to become stuck and unable to close completely, resulting in check valve malfunction. Summary of the Invention

[0004] This application provides a self-cleaning control method for a check valve system, a check valve system, and a cooking device to solve the technical problem that oil buildup in the check valve of current cooking devices causes the blades to stick and fail to close completely, resulting in check valve malfunction.

[0005] In a first aspect, this application provides a self-cleaning control method for a check valve system used in cooking equipment; the check valve system includes a pipe body, blades, a drive mechanism, and a monitoring unit; the pipe body has a smoke exhaust channel, the blades are disposed within the smoke exhaust channel, the drive mechanism is used to drive the blades to rotate to open or close the smoke exhaust channel; the monitoring unit is used to detect the thickness of oil stains on the surface of the blades;

[0006] The control method includes:

[0007] In response to a cleaning signal, the cleaning status of the blade is determined;

[0008] The drive mechanism is controlled to drive the blade to reciprocate.

[0009] The self-cleaning control method provided in this application can, based on the condition of the blades, use the reciprocating motion of the blades to fling off the oil stains when oil accumulates on the blades, thereby achieving the effect of cleaning the oil stains on the blades. The blades can activate self-cleaning according to the oil stain status, maintaining smooth blade movement and ensuring normal blade closure, thus preventing check valve failure.

[0010] As an optional implementation, determining the cleaning status of the blade in response to a cleaning signal includes:

[0011] In response to a first cleaning signal, it is determined that the blades require light cleaning; wherein the first cleaning signal includes a cooking end signal of the cooking device and a feedback signal when the monitoring unit detects that the thickness of the oil stains is greater than or equal to a first threshold.

[0012] As an optional implementation, controlling the drive mechanism to drive the blade to reciprocate includes:

[0013] The drive mechanism is controlled to drive the blade to continuously reciprocate within a first stroke range at a first frequency for a first duration.

[0014] As an optional implementation, determining the cleaning status of the blade in response to a cleaning signal includes:

[0015] In response to a second cleaning signal, it is determined that the blades require deep cleaning; wherein the second cleaning signal includes a feedback signal when the cumulative running time of the cooking equipment is greater than a set value, and a feedback signal when the monitoring unit detects that the thickness of the oil stains is greater than or equal to a second threshold; the second threshold is greater than the first threshold.

[0016] As an optional implementation, the check valve system includes a heating unit disposed on the blade, the heating unit being used to heat the blade;

[0017] In response to the second cleaning signal, it is determined that the blade requires deep cleaning, followed by:

[0018] The heating unit is controlled to heat the blade to a preset temperature range and maintain the temperature for a preset time.

[0019] As an optional implementation, after heat preservation, controlling the drive mechanism to drive the blades to reciprocate includes:

[0020] The drive mechanism is controlled to drive the blade to reciprocate within a second stroke range for a second duration.

[0021] The second stroke range is the range of rotation of the blade from closing the smoke exhaust channel to fully opening the smoke exhaust channel.

[0022] As an optional implementation, the second duration includes a first time period and a second time period;

[0023] During the first time period, the blade reciprocates at a second frequency, and when the blade rotates to both ends of the second stroke range, it stays for a preset time.

[0024] During the second time period, the blade continuously reciprocates at a third frequency;

[0025] The third frequency is greater than the second frequency.

[0026] As an optional implementation, the check valve system includes an oil recovery structure located at the bottom of the exhaust channel; the oil recovery structure includes an oil collection box and a solenoid valve, the oil collection box having a flow guide channel, and the solenoid valve being used to open and close the flow guide channel;

[0027] The control method further includes:

[0028] Detect the oil level in the oil collection box;

[0029] If the oil level exceeds a preset height, the solenoid valve is controlled to open the flow channel to discharge the oil, and the opening time is maintained for a preset duration.

[0030] Control the solenoid valve to close the flow channel.

[0031] Secondly, this application provides a check valve system, the check valve system comprising:

[0032] The pipe body has a smoke exhaust channel;

[0033] Blades, the blades being disposed within the smoke exhaust channel;

[0034] A drive mechanism is used to drive the blades to rotate in order to open or close the smoke exhaust channel;

[0035] A monitoring unit is used to detect the thickness of oil stains on the surface of the blade;

[0036] The drive mechanism can drive the blades to rotate reciprocally to shake off the oil stains adhering to the surface of the blades.

[0037] As an optional implementation, the monitoring unit is disposed on the top wall of the smoke exhaust duct, and the monitoring unit is located on the windward side of the blade;

[0038] The monitoring unit has a monitoring window that faces the blade and is tilted.

[0039] As an optional implementation, the drive mechanism is located on the side of the blade facing away from the windward side; the blade is rotatably connected to the top wall of the smoke exhaust channel;

[0040] The drive mechanism includes a protective cover, a drive unit, and a connecting rod. The drive unit is located at the top of the smoke exhaust duct, and the protective cover covers the outside of the drive unit. The two ends of the connecting rod are respectively connected to the output end of the drive unit and the blade, so that the drive unit drives the connecting rod to rotate the blade.

[0041] As an optional implementation, the check valve system further includes a heating unit disposed on the blade and used to heat the blade; the heating unit is arranged circumferentially around the blade.

[0042] As an optional implementation, the check valve system further includes an oil recovery structure, which is disposed at the bottom of the exhaust channel;

[0043] The oil spill recovery structure includes:

[0044] The oil collection box has an oil leakage hole communicating with the bottom wall of the exhaust channel, and the bottom wall of the exhaust channel has a guide surface inclined toward the oil leakage hole.

[0045] A liquid level sensor is used to detect the oil level in the oil collection box.

[0046] The solenoid valve is used to open and close the flow channel according to the oil level detected by the liquid level sensor. The oil collection box has a flow channel.

[0047] Thirdly, this application provides a cooking device, which includes the check valve system described above.

[0048] This application provides a self-cleaning control method for a check valve system, a check valve system, and a cooking device. The check valve system is used in the cooking device. The check valve system includes a pipe body, blades, a drive mechanism, and a monitoring unit. The pipe body has a smoke exhaust channel, and the blades are disposed within the smoke exhaust channel. The drive mechanism is used to drive the blades to rotate to open or close the smoke exhaust channel. The monitoring unit is used to detect the thickness of oil stains on the surface of the blades. The control method includes: responding to a cleaning signal to determine the state of the blades to be cleaned; controlling the drive mechanism to drive the blades to rotate reciprocally, thereby throwing the oil stains off the blades, achieving the effect of cleaning the oil stains on the blades, and realizing long-term reliable operation of the check valve, efficient smoke exhaust, and convenient user maintenance.

[0049] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, the self-cleaning control method of the check valve system, the check valve system and cooking equipment provided by this application, other technical problems that can be solved, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a schematic diagram of the structure of the cooking equipment provided in the embodiments of this application;

[0052] Figure 2 This is a schematic diagram of the closed check valve system provided in an embodiment of this application;

[0053] Figure 3 This is a schematic diagram of the open structure of the check valve system provided in the embodiments of this application;

[0054] Figure 4 A flowchart of a self-cleaning control method for a check valve system provided in an embodiment of this application;

[0055] Figure 5 A flowchart of Embodiment 1 of the self-cleaning control method for a check valve system provided in this application;

[0056] Figure 6 A flowchart of Embodiment 2 of the self-cleaning control method for a check valve system provided in this application;

[0057] Figure 7 This is a flowchart of Embodiment 3 of the self-cleaning control method for a check valve system provided in this application.

[0058] Explanation of reference numerals in the attached figures:

[0059] 10-Cooking equipment;

[0060] 100-Check valve system; 110-Pipe body; 111-Exhaust duct; 112-Guide surface; 120-Blade; 130-Drive mechanism; 131-Protective cover; 132-Drive unit; 133-Connecting rod; 140-Monitoring unit; 141-Monitoring window; 150-Heating unit; 160-Oil recovery structure; 161-Oil collection box; 1611-Oil leakage hole; 162-Liquid level sensor; 163-Solenoid valve; 164-Guide channel;

[0061] 200 - Host computer module;

[0062] 300-Stove Module;

[0063] 400-Lower-level module;

[0064] 500-Smoke hood module. Detailed Implementation

[0065] Current integrated cooktops generally employ a mechanical flap structure for their check valve systems. The core components include the valve body, blades, and a drive mechanism. Under normal operating conditions, the blades open and close under airflow pressure or an external drive device (such as a motor) to control the flow of fumes. When the user activates the cooktop's exhaust function, the check valve blades open the exhaust channel via airflow, expelling fumes outdoors. In non-operating conditions, the blades must close to prevent odors and foul air from flowing back into the kitchen from the shared exhaust duct. This grease not only gradually accumulates at the blade's rotating joints, causing the blades to jam and fail to close completely, but also significantly reduces the effective cross-sectional area of ​​the exhaust channel due to continuous grease buildup, thereby increasing wind resistance and weakening the cooktop's smoke extraction efficiency and wind pressure performance.

[0066] Furthermore, check valves are typically installed deep within the flue, making it difficult for users to directly observe their status. The complex disassembly process also leads to a long-term neglect of cleaning and maintenance. The long-term accumulation of grease not only causes a continuous decline in equipment performance but can also lead to hygiene problems, such as unpleasant odors from deteriorated grease or bacterial growth. Therefore, achieving automatic cleaning, efficient grease treatment, and long-term functional reliability of check valves has become a critical technical bottleneck that urgently needs to be overcome in the design of integrated cooktops.

[0067] To address the aforementioned technical problems, this application provides a self-cleaning control method for a check valve system, a check valve system, and a cooking device. By integrating intelligent monitoring, a graded cleaning strategy, and an oil residue recovery system, it achieves active cleaning, dynamic optimization, and closed-loop management of oil residue on the check valve blades. Specifically, sensors monitor the oil residue thickness in real time, triggering light or deep cleaning modes based on preset cleaning thresholds. A push rod motor drives the blades in reciprocating motion, combined with a heating module to soften stubborn grease, achieving efficient cleaning. Simultaneously, an oil collection and guiding structure recovers the cleaned oil residue into the integrated stove's oil cup, preventing secondary pollution. The self-cleaning control method for the check valve system provided in this application overcomes the limitations of traditional check valves that passively rely on manual maintenance, constructing an integrated intelligent system of "monitoring-cleaning-recovery," solving core problems such as blade jamming, reduced smoke extraction efficiency, and secondary pollution caused by oil residue accumulation.

[0068] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0069] The self-cleaning control method of the check valve system, the application scenarios of the check valve system and cooking equipment provided in the embodiments of this application will be described first.

[0070] This application applies to the check valve system of kitchen exhaust equipment such as integrated cooktops. Its core application scenario is as follows: during cooking, the integrated cooktop controls the opening and closing of the exhaust duct via the check valve, while a built-in intelligent control system monitors the grease levels in real time and automatically triggers a cleaning process. Specifically, the check valve is installed in the flue, and its blades open and close to adapt to exhaust demand. Grease adheres to the blade surface during exhaust; the intelligent control system can control the check valve to perform self-cleaning to prevent grease accumulation from causing blade jamming and reduced exhaust efficiency.

[0071] Reference Figures 1 to 4 As shown, this application embodiment provides a self-cleaning control method for a check valve system. The check valve system 100 is used in a cooking appliance 10. The executing entity of this control method can be the intelligent control system of the cooking appliance 10.

[0072] The check valve system 100 includes a pipe body 110, a blade 120, a drive mechanism 130, and a monitoring unit 140. The pipe body 110 has a smoke exhaust channel 111, and the blade 120 is disposed within the smoke exhaust channel 111. The drive mechanism 130 is used to drive the blade 120 to rotate to open or close the smoke exhaust channel 111. The monitoring unit 140 is used to detect the thickness of oil stains on the surface of the blade 120.

[0073] Understandably, when cooking begins, the drive mechanism 130 drives the blades 120 to open the exhaust duct 111 to allow the fumes to escape; when cooking is finished, the drive mechanism 130 drives the blades 120 to close the exhaust duct 111 to prevent the fumes from flowing back in.

[0074] The control method includes:

[0075] S101. In response to the cleaning signal, determine the cleaning status of the blade.

[0076] Since cooking fumes accumulate on the surface of blade 120 during each cooking process, it is necessary to periodically check the oil stain adhesion status of blade 120 at specific time points, or to determine the oil stain adhesion status of blade 120 based on the real-time monitoring results of monitoring unit 140.

[0077] The blade 120 can have multiple cleaning modes, such as light cleaning mode and deep cleaning mode, with different cleaning signals corresponding to different cleaning modes. When the amount of oil on the surface of the blade 120 is large, the deep cleaning mode can be used, and when the amount of oil on the surface of the blade 120 is small, the light cleaning mode can be used.

[0078] It is understandable that the monitoring unit 140 is a non-contact sensor. A non-contact sensor is a sensor that can obtain target parameters without direct contact with the object being measured, such as an infrared optical sensor or a laser sensor, and is used to measure the thickness of oil stains on the surface of the blade 120.

[0079] For example, the monitoring unit 140 can be an infrared optical sensor that calculates the oil stain coverage thickness δ by measuring the intensity attenuation or time-of-flight variation of the emitted and received reflected light. When the sensor detects that the oil stain thickness δ on the surface of the blade 120 reaches a first threshold δ1, a light cleaning mode is triggered; if δ reaches a second threshold δ2, a deep cleaning mode is triggered.

[0080] In addition, non-contact oil stain thickness measurement can be achieved by measuring the intensity attenuation of emitted and reflected light. After emitted light (such as infrared light) shines on the surface of blade 120, some of the light is reflected by the oil stain. The sensor receives the reflected light and analyzes its intensity attenuation. The greater the oil stain thickness, the more obvious the intensity attenuation of the reflected light.

[0081] It should be noted that the infrared optical sensor, based on the reflective properties of light, enables non-contact monitoring without touching the blades 120, avoiding the subjectivity and lag of traditional manual observation. Through dynamic threshold judgment, the system can accurately distinguish between light and deep cleaning needs, thereby optimizing the allocation of cleaning resources and improving overall efficiency.

[0082] S102, control the drive mechanism to drive the blades to reciprocate.

[0083] Driven by the drive mechanism 130, the blade 120 rotates back and forth, which can throw off the oil stains on the blade 120. The oil stains after being thrown off flow down in the smoke exhaust channel 111 under the action of gravity and can be collected and cleaned.

[0084] Under the control of the intelligent control system of the cooking equipment 10, the drive mechanism 130 can control parameters such as the rotation amplitude, frequency, and duration of the blades 120. Different cleaning modes can correspond to different rotation amplitudes, frequencies, and durations of the blades 120.

[0085] It should be noted that the self-cleaning control method provided in this application embodiment, when oil accumulates on the blade 120, utilizes the reciprocating motion of the blade 120 to fling the oil off the blade 120, thereby achieving the effect of cleaning the oil on the blade 120. By employing a differentiated cleaning strategy, oil in different states is efficiently removed, ensuring smooth movement of the blade 120 and allowing it to close normally, thus preventing check valve failure.

[0086] The self-cleaning control method will be described in detail below through examples of different cleaning modes.

[0087] Example 1

[0088] Please refer to Figure 5 and combined Figures 1 to 3 In this embodiment, a light cleaning mode is performed on the check valve system 100.

[0089] This application provides a self-cleaning control method for a check valve system, the control method comprising:

[0090] S201. In response to a first cleaning signal, determine that the blades need light cleaning; wherein the first cleaning signal includes a cooking end signal of the cooking device and a feedback signal when the monitoring unit detects that the thickness of the oil stains is greater than or equal to a first threshold.

[0091] Understandably, the check valve system 100 can initiate a light self-cleaning operation after each cooking cycle. Alternatively, the check valve system 100 can initiate a light self-cleaning operation when the monitoring unit 140 detects that the thickness of the oil stains on the surface of the blade 120 is greater than the first threshold δ1.

[0092] S202, The control drive mechanism drives the blade to continuously reciprocate within the first stroke range at a first frequency for a first duration.

[0093] The drive mechanism 130 may include a push rod motor, which is connected to the blade 120 via a connecting rod 133 to form a crank-slider mechanism. The push rod stroke of the push rod motor corresponds to the rotation stroke of the blade 120.

[0094] For example, in the light cleaning mode, the first stroke range of the blade 120 corresponds to the push rod movement stroke of the push rod motor of 2mm-5mm, the first frequency of the reciprocating rotation of the blade 120 is 5Hz-10Hz, and the first duration of the continuous reciprocating rotation of the blade 120 is 60s, thereby shaking off the unsolidified oil droplets on the surface of the blade 120 through high-frequency vibration.

[0095] Example 2

[0096] Please refer to Figure 6 and combined Figures 1 to 3 This embodiment implements the deep cleaning mode of the check valve system 100. The check valve system 100 may include a heating unit 150, which is disposed on the blade 120 and is used to heat the blade 120. The difference between the deep cleaning mode and the light cleaning mode is that the deep cleaning mode uses the heating unit 150 to heat and soften the oil stains, and then the blade 120 rotates to centrifuge and throw away the oil stains, so as to achieve the effect of cleaning stubborn oil stains.

[0097] This application provides a self-cleaning control method for a check valve system, the control method comprising:

[0098] S301. In response to the second cleaning signal, determine that the blades need deep cleaning; wherein the second cleaning signal includes a feedback signal when the cumulative running time of the cooking equipment is greater than a set value, and a feedback signal when the monitoring unit detects that the thickness of the oil stains is greater than or equal to a second threshold.

[0099] Understandably, the intelligent control system of cooking equipment 10 has a timing function, which can time the cooking operation time of cooking equipment 10 and accumulate the operation time each time. The longer the accumulated operation time, the more oil stains will adhere to the surface of blade 120. In the first case, if the accumulated operation time t of cooking equipment 10 is greater than the set value T, the feedback signal is used as a cleaning signal to cause the check valve system 100 to start performing a deep cleaning operation.

[0100] In another scenario, if the monitoring unit 140 detects that the oil thickness δ on the surface of the blade 120 reaches a second threshold δ2, a deep cleaning mode is triggered. δ2 is greater than δ1, meaning that the oil thickness threshold for triggering deep cleaning is higher than the oil thickness threshold for triggering light cleaning.

[0101] S302, The heating unit controls the blades to heat to a preset temperature range and maintains the temperature for a preset time.

[0102] It is understood that the heating unit 150 can be located inside the blade 120, and the blade 120 can be heated to 60-70°C through indirect heating (the heating unit 150 and the surface of the blade 120 are separated by a layer design), which reduces the viscosity of the oil stains and transforms them from a solid or semi-solid state into a liquid state, making it easier for subsequent physical removal. The heating unit 150 can be a PTC heating element, a resistance wire heater, etc.

[0103] For example, the heating unit 150 can be a PTC heating element. The indirect heating design of the PTC heating element avoids the risk of open flame that may be caused by direct contact of high temperature with oil stains, while ensuring heating uniformity and avoiding incomplete cleaning caused by local cold areas.

[0104] It should be noted that after the blades 120 are heated to the preset temperature range, they can be kept warm for a certain period of time before performing the next physical cleaning step. The holding time can be 2-10 minutes, for example, 2 minutes, 5 minutes, 10 minutes, etc., and this application embodiment does not make a specific limitation on this.

[0105] S303, control the drive mechanism to drive the blade to reciprocate within the second stroke range for a second duration; wherein, the second stroke range is the range of rotation of the blade from the closed smoke exhaust channel to the fully open smoke exhaust channel.

[0106] The smoke exhaust direction of the smoke exhaust duct 111 is the X direction. When the blade 120 closes the smoke exhaust duct 111, the windward surface of the blade 120 can be perpendicular or approximately perpendicular to the X direction; when the blade 120 opens the smoke exhaust duct 111, the windward surface of the blade 120 can be parallel or nearly parallel to the X direction.

[0107] For example, the push rod motor can drive the blade 120 to reciprocate within the range of 0-80°, using centrifugal force to remove oil stains. Taking a second duration of 120 seconds as an example, it moves from the closed position (0°) to the fully open position (80°), pauses for 0.2 seconds, then quickly returns to the closed position, pauses for another 0.2 seconds, and this constitutes one cycle, lasting for 120 seconds.

[0108] In some embodiments, the motion frequency can be dynamically adjusted during the second duration. The second duration may include a first time period and a second time period. During the first time period, the blade 120 reciprocates at a second frequency, and when the blade 120 rotates to both ends of the second stroke range, it stays for a preset time; during the second time period, the blade 120 continuously reciprocates at a third frequency; the third frequency is greater than the second frequency.

[0109] For example, the first time period is the first 30 seconds, running at a lower frequency (e.g., 1Hz) to ensure that large pieces of oil are removed; the second time period is the last 90 seconds, increasing the frequency to 2Hz to generate greater inertial force to remove residual oil film. When cleaning is complete, the push rod motor stops and the blades 120 return to the closed position.

[0110] Example 3

[0111] Please refer to Figure 7 and combined Figures 1 to 3This embodiment adds an oil recovery step based on the aforementioned embodiment. The check valve system 100 may include an oil recovery structure 160, which is disposed at the bottom of the exhaust channel 111. The oil recovery structure 160 includes an oil collection box 161 and a solenoid valve 163. The oil collection box 161 has a flow guiding channel 164, and the solenoid valve 163 is used to open and close the flow guiding channel 164.

[0112] This application provides a self-cleaning control method for a check valve system, the control method comprising:

[0113] S401, in response to the cleaning signal, determines the cleaning status of the blades.

[0114] Step S401 is implemented in a similar manner to step S101 in the previous embodiment, and will not be described again here.

[0115] S402, control the drive mechanism to drive the blades to reciprocate.

[0116] Step S402 is implemented in a similar manner to step S102 in the previous embodiment, and will not be described again here.

[0117] S403. Detect the oil level in the oil collection box; if the oil level exceeds the preset height, control the solenoid valve to open the guide channel to discharge the oil and maintain the preset opening time.

[0118] Understandably, the oil collection box 161 can be connected to an oil cup that is easy to disassemble and clean via the guide channel 164. When the cleaning mode ends and the cooking device 10 is not in operation, the oil is thrown to the inner wall of the exhaust channel 111 by centrifugal force, and then flows down the wall under the action of gravity and collects in the oil collection box 161 at the bottom. When the liquid level in the oil collection box 161 is greater than the set value a cm, the one-way solenoid valve 163 opens and remains open for t = 10-15 seconds, allowing the collected oil to flow completely into the stove oil cup of the cooking device 10 by gravity for easy cleaning.

[0119] S404, Control the solenoid valve to close the flow channel.

[0120] Understandably, the solenoid valve 163 is normally closed to prevent odors from the public flue from entering the kitchen through the guide channel 164, thus keeping the kitchen air fresh.

[0121] In one possible implementation, the triggering of the cleaning mode in the above embodiments can be dynamically adjusted.

[0122] At least one of a humidity sensor and a smoke concentration sensor may be installed in the smoke exhaust duct 111 or on the airflow path of the smoke exhaust duct 111.

[0123] For example, the trigger threshold for the cleaning mode can be adjusted based on ambient humidity, where ambient humidity refers to the air humidity level in the kitchen environment. Ambient humidity affects the rate at which grease solidifies. Grease solidifies more easily in high humidity environments, requiring shorter cleaning intervals.

[0124] For example, the trigger frequency of the cleaning mode can be adjusted according to the concentration of cooking fumes, where the concentration of cooking fumes refers to the density of cooking fume particles in the air, which affects the rate at which oil adheres. In scenarios with high concentrations of cooking fumes, oil adheres faster, requiring a higher cleaning frequency.

[0125] It should be noted that environmental parameters are collected by ambient humidity and oil fume concentration sensors, and the triggering conditions for the cleaning mode are dynamically adjusted. For example, in high humidity environments, the trigger threshold for the cleaning mode is lowered (e.g., δ1 is reduced), or in high oil fume concentration scenarios, the cleaning frequency is increased (e.g., the trigger interval for the light cleaning mode is shortened), thus optimizing the cleaning strategy for different scenarios. As another example, in low-temperature, high-humidity scenarios, the heating time is extended to ensure sufficient softening of grease; in high oil fume concentration scenarios, the cleaning interval is shortened to prevent rapid accumulation of grease.

[0126] In one possible implementation, a spectral analysis unit can be provided in the check valve system 100, and the triggering of the cleaning mode in the above embodiments can be assisted by the spectral analysis unit.

[0127] Understandably, spectral analysis technology can be used to identify the composition of oil stains and select a cleaning mode based on those components. For example, near-infrared spectral analysis can be used, where near-infrared spectral sensors determine whether the oil stain is animal oil, vegetable oil, or a mixture of both by analyzing its absorption spectral characteristics.

[0128] It should be noted that by using spectral analysis technology (such as near-infrared spectral sensors) to identify the components of oil stains and selecting the cleaning mode based on the characteristics of these components, the cleaning process is precisely tailored. For example, animal oil triggers a deep cleaning mode and extends the heating time, while vegetable oil uses a mild cleaning mode combined with high-frequency micro-vibration. Furthermore, for viscous animal oil, the system actively extends the heating time and increases centrifugal force to ensure thorough removal; while for easily emulsified vegetable oil, it reduces heating energy consumption and shortens the cleaning cycle.

[0129] The structure of the check valve system 100 is described in detail below.

[0130] Please refer to Figures 1 to 3This application provides a check valve system 100, which includes a pipe body 110, a blade 120, a drive mechanism 130, and a monitoring unit 140. The pipe body 110 has a smoke exhaust channel 111, and the blade 120 is disposed within the smoke exhaust channel 111. The drive mechanism 130 is used to drive the blade 120 to rotate to open or close the smoke exhaust channel 111. The monitoring unit 140 is used to detect the thickness of oil stains on the surface of the blade 120.

[0131] The drive mechanism 130 can drive the blade 120 to rotate back and forth to shake off the oil stains attached to the surface of the blade 120.

[0132] In some embodiments, the monitoring unit 140 is disposed on the top wall of the smoke exhaust duct 111 and the monitoring unit 140 is located on the windward side of the blade 120. The monitoring unit 140 has a monitoring window 141 facing the blade 120 and is inclined.

[0133] It is understandable that the monitoring window 141 of the monitoring unit 140 faces the sealing surface when the blade 120 is closed, away from the end of the airflow entering the exhaust channel 111. At the same time, the sensor window is designed with an inclined angle to prevent oil stains from directly covering the center of the window, so as to ensure the accuracy of the detection results.

[0134] In some embodiments, the drive mechanism 130 is located on the side of the blade 120 away from the windward side. The blade 120 is rotatably connected to the top wall of the smoke exhaust duct 111.

[0135] The drive mechanism 130 includes a protective cover 131, a drive unit 132, and a connecting rod 133. The drive unit 132 is located on the top of the smoke exhaust channel 111. The protective cover 131 covers the outside of the drive unit 132. The two ends of the connecting rod 133 are connected to the output end of the drive unit 132 and the blade 120, respectively, so that the drive unit 132 drives the connecting rod 133 to rotate the blade 120.

[0136] Understandably, the drive unit 132 can be a push rod motor. The push rod motor is horizontally mounted on the top of the exhaust duct 111, away from the windward side of the blades 120, preventing direct contact between the push rod motor and oil contaminants, which could lead to failure over time and improve the reliability of the drive unit 132. A protective cover 131 is installed on the outside of the push rod motor, securing it and providing dust and oil protection, extending its service life. The push rod motor drives the opening and closing of the blades 120. The linear motion output end of the push rod motor is connected to the blades 120 via a connecting rod 133, forming a crank-slider mechanism that converts linear motion into rotational motion of the blades 120, improving the smoothness and reliability of the blade rotation.

[0137] For example, when the push rod of the push rod motor is in the extended state, the vane 120 of the check valve is in the closed and sealed state; when the push rod of the push rod motor is retracted, the vane 120 of the check valve is in the open state. When the vane 120 is open, the vane 120 and the top wall of the smoke exhaust channel 111 form a triangular area, and the vane 120 is positioned below the drive unit 132, thus preventing the oil fumes from directly contacting the drive unit 132.

[0138] For example, the connecting rod 133 and the blade 120 shaft can be connected by a ball bearing or a self-lubricating bushing. The output end of the push rod motor and the connecting rod 133 can also be connected by a ball joint bearing, thereby avoiding the mechanism from jamming due to oil accumulation or thermal deformation and ensuring smooth movement.

[0139] It should be noted that when the cooking device 10 is in operation, the control drive unit 132 opens the blade 120 of the check valve. The opening angle of the check valve blade 120 can be controlled according to the suction mode (weak, strong, and stir-fry mode) of the cooking device 10. The opening angle reaches the maximum in the stir-fry mode and decreases accordingly in the weak mode, which can reduce energy consumption while satisfying the smoke extraction effect.

[0140] In some embodiments, the check valve system 100 may further include a heating unit 150, which is disposed on the blade 120 and is used to heat the blade 120.

[0141] The heating unit 150 can be arranged circumferentially around the blade 120. The ring-shaped heating unit 150 ensures uniform heating of the blade 120 around its circumference, eliminating cold spots and ensuring consistent softening of oil. In addition, the surface of the heating unit 150 is separated from the exhaust channel 111 by a layer of stainless steel or aluminum alloy wall, achieving indirect heating and avoiding the risk of open flame that may be caused by the high-temperature heating unit 150 directly contacting the oil.

[0142] In some embodiments, the check valve system 100 may further include an oil recovery structure 160, which is disposed at the bottom of the exhaust duct 111. The oil recovery structure 160 may include an oil collection box 161, a liquid level sensor 162, and a solenoid valve 163.

[0143] The exhaust duct 111 has an oil drain hole 1611 at its bottom wall, which communicates with the oil collection box 161. The bottom wall of the exhaust duct 111 also has a guide surface 112 inclined towards the oil drain hole 1611. A liquid level sensor 162 is used to detect the oil level in the oil collection box 161. The oil collection box 161 has a guide channel 164, and a solenoid valve 163 is used to open and close the guide channel 164 according to the oil level detected by the liquid level sensor 162.

[0144] Understandably, the guide surface 112 of the bottom inner wall of the exhaust duct 111 is designed to slope towards the center. A funnel-shaped oil drain hole 1611 is designed at the opening of the oil collection box 161 at the lowest point of the guide surface 112 to facilitate oil collection and prevent secondary pollution of oil in the exhaust duct 111. To prevent oil from solidifying in the guide channel 164, the pipe of the guide channel 164 can be designed as a copper or aluminum pipe and installed close to the outer wall of the pipe body 110, which has a relatively high temperature, to use the residual heat of the pipe body 110 to insulate the pipeline.

[0145] Please refer to Figure 1 This application provides a cooking device 10, which includes the check valve system 100 described above.

[0146] Taking an integrated stove as an example, the cooking device 10 may include a host computer module 200, a stove module 300, a slave computer module 400, a range hood module 500, and a check valve system 100. The host computer module 200 and the slave computer module 400 are arranged vertically, and the stove module 300 is located above the slave computer module 400 and is used for cooking.

[0147] Understandably, the range hood module 500 is installed on the lower-level module 400. The range hood module 500 generates negative pressure suction to draw the cooking fumes from the air intake of the upper-level module 200 and flow downwards to the lower-level module 400. After passing through the range hood module 500, the fumes enter the check valve system 100 and are finally discharged from the check valve system 100.

[0148] It should be noted that, in the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0149] In the description of the embodiments of this application, the term "and / or" merely indicates a relationship describing the associated objects, meaning that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the term "at least one" indicates any combination of at least two of a plurality of options, for example, including at least one of A, B, and C, which can represent any one or more elements selected from a set including communication between A, B, and C.

[0150] In the description of the embodiments of this application, the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the term "multiple" means two or more, unless otherwise precisely specified.

[0151] In the description of the embodiments of this application, the terms "first," "second," "third," "fourth," etc. (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0152] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A self-cleaning control method of a check valve system, characterized by, The check valve system is used in a cooking device; the check valve system comprises a pipe body, a vane, a driving mechanism and a monitoring unit; the pipe body has a smoke exhaust passage, the vane is arranged in the smoke exhaust passage, and the driving mechanism is used to drive the vane to rotate to open or close the smoke exhaust passage; The monitoring unit is used to detect the thickness of oil stains on the surface of the vane; The control method comprises: In response to a cleaning signal, determining the cleaning state of the vane; Controlling the driving mechanism to drive the vane to reciprocate rotation.

2. The self-cleaning control method of a check valve system according to claim 1, characterized by, The response to the cleaning signal, determining the cleaning state of the vane, comprises: In response to a first cleaning signal, determining that the vane needs light cleaning; wherein the first cleaning signal comprises a cooking end signal of the cooking device and a feedback signal when the monitoring unit detects that the thickness of the oil stains is greater than or equal to a first threshold value.

3. The self-cleaning control method of a check valve system according to claim 2, wherein, The control of the driving mechanism to drive the vane to reciprocate rotation, comprises: Controlling the driving mechanism to drive the vane to reciprocate rotation in a first stroke range for a first time length at a first frequency.

4. The self-cleaning control method of a check valve system according to claim 2, wherein The response to the cleaning signal, determining the cleaning state of the vane, comprises: In response to a second cleaning signal, determining that the vane needs deep cleaning; wherein the second cleaning signal comprises a feedback signal when the cumulative running time of the cooking device is greater than a set value and a feedback signal when the monitoring unit detects that the thickness of the oil stains is greater than or equal to a second threshold value; the second threshold value is greater than the first threshold value.

5. The self-cleaning control method of a check valve system according to claim 4, wherein The check valve system comprises a heating unit arranged on the vane, and the heating unit is used to heat the vane; In response to the second cleaning signal, determining that the vane needs deep cleaning, further comprises: Controlling the heating unit to heat the vane to a preset temperature range and maintain the temperature for a preset time length.

6. The self-cleaning control method of a check valve system according to claim 5, wherein After maintaining the temperature, controlling the driving mechanism to drive the vane to reciprocate rotation, comprises: Controlling the driving mechanism to drive the vane to reciprocate rotation in a second stroke range for a second time length; Wherein, the second stroke range is the rotation range of the vane from closing the smoke exhaust passage to completely opening the smoke exhaust passage.

7. The self-cleaning control method of a check valve system according to claim 6, wherein The second time length comprises a first time period and a second time period; In the first time period, the vane reciprocates rotation at a second frequency, and when the vane rotates to both ends of the second stroke range, it stays for a preset time; In the second time period, the vane reciprocates rotation continuously at a third frequency; The third frequency is greater than the second frequency.

8. The self-cleaning control method of a check valve system according to claim 1, wherein, The check valve system comprises an oil stain recovery structure arranged at the bottom of the smoke exhaust passage; the oil stain recovery structure comprises an oil collecting box and a solenoid valve, the oil collecting box has a flow guide passage, and the solenoid valve is used to open and close the flow guide passage; The control method further comprises: Detecting the oil level of the oil collecting box; If the oil level exceeds a preset height, controlling the solenoid valve to open the flow guide passage to discharge the oil stains and maintain a preset opening time length; Controlling the solenoid valve to close the flow guide passage.

9. A check valve system characterized by, The check valve system comprises: A pipe body having a smoke exhaust passage; A vane arranged in the smoke exhaust passage; A drive mechanism is used to drive the blades to rotate in order to open or close the smoke exhaust channel; A monitoring unit is used to detect the thickness of oil stains on the surface of the blade; The drive mechanism can drive the blades to rotate reciprocally to shake off the oil stains adhering to the surface of the blades.

10. The check valve system of claim 9, wherein, The monitoring unit is installed on the top wall of the smoke exhaust duct, and the monitoring unit is located on the windward side of the blade; The monitoring unit has a monitoring window that faces the blade and is tilted.

11. The check valve system of claim 9, wherein, The drive mechanism is located on the side of the blade away from the windward side; the blade is rotatably connected to the top wall of the smoke exhaust channel; The drive mechanism includes a protective cover, a drive unit, and a connecting rod. The drive unit is located at the top of the smoke exhaust duct, and the protective cover covers the outside of the drive unit. The two ends of the connecting rod are respectively connected to the output end of the drive unit and the blade, so that the drive unit drives the connecting rod to rotate the blade.

12. The check valve system of claim 9, wherein, The check valve system also includes a heating unit disposed on the blade and used to heat the blade; the heating unit is arranged circumferentially around the blade.

13. The check valve system of claim 9, wherein, The check valve system also includes an oil recovery structure, which is located at the bottom of the exhaust channel; The oil spill recovery structure includes: The oil collection box has an oil leakage hole communicating with the bottom wall of the exhaust channel, and the bottom wall of the exhaust channel has a guide surface inclined toward the oil leakage hole. A liquid level sensor is used to detect the oil level in the oil collection box. The solenoid valve is used to open and close the flow channel according to the oil level detected by the liquid level sensor. The oil collection box has a flow channel.

14. A cooking apparatus, characterized by, The cooking device includes a check valve system as described in any one of claims 9-13.

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