Integrated cooker and control method thereof

Abstract

The application discloses an integrated cooker, which comprises an air quality detection device for detecting pollutants escaping to the outside of the air curtain. The integrated cooker has an air suction panel, an air suction port is arranged on the air suction panel, a top plate is horizontally arranged on the top of the air suction panel, a front side of the top plate is downwardly formed with an air curtain, the air curtain forms an air curtain surface for downward air supply, and the air curtain surface, the top plate and the air suction panel enclose a negative pressure area. The air suction port is communicated with an exhaust channel in a cabinet body, a variable frequency exhaust fan is arranged in the exhaust channel, and the rotating speed of the exhaust fan is positively correlated with the detection value of the air quality detection device. The integrated cooker can automatically control the rotating speed of the exhaust fan and the air curtain fan, and can automatically adjust the integrated cooker according to the cooking process, the amount of escaping oil fume and the like without the control of a cooking personnel, so that the problem of oil fume escaping due to the failure of the cooking personnel to timely adjust the exhaust fan and the air curtain fan can be effectively avoided.

Description

Technical Field

[0001] This invention belongs to the field of cooktops, specifically relating to an integrated cooktop and its control method. Background Technology

[0002] Integrated cooktops on the market include those that can generate an air curtain and those that cannot. Comparatively, integrated cooktops that can generate an air curtain are more effective at preventing the escape of cooking fumes. When an integrated cooktop is working, the cooker adjusts the cooktop's settings according to the amount of cooking fumes. This manual adjustment method is prone to errors due to the cooker being busy cooking, leading to a large amount of fumes escaping. Furthermore, the air curtain's fan speed also affects its effectiveness in preventing fumes from escaping. However, for energy-saving and noise-reduction considerations, the air curtain's fan speed cannot be blindly adjusted to maximum. The cooker manually adjusting both the cooktop settings and the air curtain fan speed simultaneously becomes even more overwhelmed and disorganized. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated stove and its control method, which aims to improve the problem of cooking personnel being unable to adjust the integrated stove in a timely manner, resulting in the escape of oil fumes.

[0004] The present invention is implemented as follows: An integrated stove includes a cabinet and an air quality detection device for detecting pollutants that escape to the outside of the air curtain. The integrated stove has an air intake panel with an air intake on it. A horizontally arranged top plate is located on the top of the air intake panel. An air curtain is formed downward on the front side of the top plate, forming a downward airflow surface. The air curtain surface, the top plate, and the air intake panel enclose a negative pressure area. The air intake is connected to a smoke exhaust channel inside the cabinet. A variable frequency smoke exhaust fan is installed in the smoke exhaust channel, and the rotation speed of the smoke exhaust fan is positively correlated with the detection value of the air quality detection device.

[0005] Optionally, variable-area baffles are formed on the left and right sides of the air intake panel. The baffles are arranged in a fan shape, and the fan angle after the baffles are unfolded is 0-90 degrees. The baffles are connected to a driving device, and the size of the unfolding angle of the baffles driven by the driving device is positively correlated with the detection value of the air quality detection device.

[0006] Optionally, the upper part of the cabinet is a countertop, and a vertical plate is provided on each of the left and right sides of the suction panel on the countertop. The vertical plate contains a receiving cavity, and the baffle is located in the receiving cavity when it is retracted. An opening and closing door is provided on the vertical plate, which is the outer panel of the vertical plate. The opening and closing door is connected to the drive device. In the storage state, the opening and closing door is vertically arranged and covers the receiving cavity.

[0007] Optionally, the driving device is disposed within the accommodating cavity and connected to the inner wall of the accommodating cavity. The driving device includes a stepper motor and a drive shaft. The stepper motor drives the drive shaft to rotate. The drive shaft is connected to the opening and closing door and drives the opening and closing door to rotate. The mounting part of the drive shaft is semi-cylindrical. A connecting plate is vertically disposed at one end of the opening and closing door. The end of the connecting plate away from the opening and closing door is provided with a semi-cylindrical hole that matches the mounting part of the drive shaft. The connecting plate is sleeved on the drive shaft through the semi-cylindrical hole. The baffle includes multiple sector plates, which are sequentially sleeved from the outside to the inside. The innermost sector plate is connected to the opening and closing door. The tips of all sector plates are hinged together on a shaft. Except for the innermost sector plate, the inner walls of the other sector plates are provided with arc-shaped grooves or arc-shaped holes. Except for the outermost sector plate, the outer walls of the other sector plates are provided with protrusions that fit into the arc-shaped grooves or arc-shaped holes of adjacent sector plates.

[0008] A control method for an integrated stove, wherein the integrated stove is equipped with an MCU chip, and an air curtain assembly capable of generating an air curtain is provided in the top plate, the air curtain assembly including an air curtain fan; when the integrated stove is started, the MCU chip of the integrated stove automatically sets a PM2.5 threshold, an air quality detection device has a PM2.5 detection module, the air quality detection device detects the PM2.5 concentration escaping from the negative pressure area and compares it with the PM2.5 threshold set in the MCU chip of the integrated stove, when the detected PM2.5 concentration exceeds the PM2.5 threshold, the MCU chip automatically controls the exhaust fan and / or the air curtain fan to increase their speed, and automatically controls the drive device to drive the baffle to unfold.

[0009] Optionally, when the detected PM2.5 concentration exceeds the PM2.5 threshold, the following actions are taken based on the comparison results:

[0010] A. When the value exceeds 15 micrograms per cubic meter or less, the exhaust fan should be set to medium speed and the baffle should be opened to 30 degrees.

[0011] B. When the value exceeds 15 micrograms per cubic meter, the wind curtain speed is adjusted to 65% of the maximum wind speed, and the baffle is opened at 45 degrees.

[0012] C. When the value exceeds 30 micrograms per cubic meter, the smoke exhaust fan is adjusted to the high setting, the air curtain speed is increased to 80% of the maximum speed, and the baffle is opened to 70 degrees.

[0013] D. When the value exceeds 45 micrograms per cubic meter, the exhaust fan is set to the high-speed setting, the air curtain speed is increased to the maximum speed, and the baffle is opened 90 degrees.

[0014] E. When the PM2.5 concentration is detected to exceed the PM2.5 threshold, and the excess value is greater than 60 micrograms per cubic meter, the exhaust fan is adjusted to high speed, the air curtain speed is kept at maximum speed, and the baffle is opened to 90 degrees.

[0015] At levels B, C, and D, when the PM2.5 concentration detected by the air quality monitoring device decreases to the level above, the exhaust fan speed, air curtain speed, and baffle opening angle are maintained at the current level for 20-40 seconds before being adjusted to the level above. At level E, when the PM2.5 concentration detected by the air quality monitoring device decreases to level C, the exhaust fan speed, air curtain speed, and baffle opening angle are maintained at the current level for 20-40 seconds before being adjusted to level C.

[0016] Optionally, the integrated stove has a back pressure detection module, and the exhaust fan has a constant air volume segment and a constant power segment. The constant air volume segment and the constant power segment can be switched within a certain back pressure range, which is 150-450 Pa; wherein the back pressure corresponding to the constant power segment is higher than the back pressure corresponding to the constant air volume segment.

[0017] In the constant airflow range, when the detected PM2.5 concentration exceeds the PM2.5 threshold, the MCU chip controls the exhaust fan, air curtain fan, and drive device to operate in five levels: A, B, C, D, and E. In levels B, C, and D, when the PM2.5 concentration detected by the air quality detection device decreases to the next level, the exhaust fan speed, air curtain speed, and baffle opening angle are maintained at the current level for 20-40 seconds before being adjusted to the next level. In level E, the exhaust fan speed, air curtain speed, and baffle opening angle are maintained at the current level for 20-40 seconds before being adjusted to level C.

[0018] In the constant power range, when the detected PM2.5 concentration exceeds the PM2.5 threshold, the MCU chip automatically controls the smoke exhaust fan and air curtain fan to operate in the following manner:

[0019] A1. When the value exceeds 15 micrograms per cubic meter or less, the smoke exhaust fan should be set to medium speed, the air curtain fan should be set to 75% of the maximum wind speed, and the baffle should be opened to 60 degrees.

[0020] B1. When the value exceeds 15 micrograms per cubic meter, the smoke exhaust fan is adjusted to the high setting, the air curtain speed is increased to 90% of the maximum speed, and the baffle is opened to 75 degrees.

[0021] C1. When the value exceeds 30 micrograms per cubic meter, the exhaust fan is set to the high-speed setting, the air curtain speed is increased to the maximum speed, and the baffle is opened 90 degrees.

[0022] D1. When the value exceeds 45 micrograms per cubic meter, the smoke exhaust fan should be set to high speed, the air curtain speed should be kept at maximum speed, and the baffle should be opened 90 degrees.

[0023] When the exhaust fan switches from the constant power setting to the constant air volume setting, first adjust the exhaust fan to the stir-fry setting and run it for 30 seconds, then run it according to the five-level mode A, B, C, D, and E.

[0024] Optionally, in the constant air volume range, the air velocity at the air intake is 7-13 meters per second.

[0025] Optionally, after starting the integrated stove, the MCU chip of the integrated stove can be set to the PM2.5 threshold as follows:

[0026] S1. The MCU chip controls the start of the air quality detection device. The PM2.5 detection module of the air quality detection device detects the PM2.5 concentration in the environment where the integrated stove is located and transmits the detection result P1 to the MCU chip.

[0027] S2. The PM2.5 threshold set by the MCU chip is P, then P = P1 + P2, and P2 satisfies: 10 micrograms / cubic meter ≤ P2 ≤ 20 micrograms / cubic meter.

[0028] Optionally, the integrated stove is equipped with a power storage module and a timing module. The power storage module supplies power to the MCU chip and the timing module, and the timing module is electrically connected to the MCU chip. When the integrated stove starts working and stops working, the MCU chip obtains time data from the timing module once. When the integrated stove is started, and the MCU chip automatically sets the PM2.5 threshold, the MCU chip detects and calculates the time difference T between this time and the last time the integrated stove stopped working. When T ≤ 30 minutes, the MCU chip sets the current PM2.5 threshold to the same as the previous PM2.5 threshold. When T > 30 minutes, the PM2.5 threshold is set according to the following method:

[0029] S1. The MCU chip controls the start of the air quality detection device. The PM2.5 detection module of the air quality detection device detects the PM2.5 concentration in the environment where the integrated stove is located and transmits the detection result P1 to the MCU chip.

[0030] S2. The PM2.5 threshold set by the MCU chip is P, then P = P1 + P2, and P2 satisfies: 10 micrograms / cubic meter ≤ P2 ≤ 20 micrograms / cubic meter.

[0031] Beneficial effects: This invention can automatically control the speed of the exhaust fan and air curtain fan, eliminating the need for manual control by the cook. It automatically adjusts the integrated stove according to the cooking progress and the amount of escaping fumes, effectively preventing fumes from escaping due to the cook's inability to adjust the exhaust fan and air curtain fan in a timely manner. Other advantages of this invention are described in the following description. Attached Figure Description

[0032] Figure 1 This is a three-dimensional schematic diagram of Embodiment 1 of the present invention when the baffle is in the retracted state;

[0033] Figure 2 This is a side view of Embodiment 1 of the present invention when the baffle is in the retracted state;

[0034] Figure 3 This is a three-dimensional schematic diagram of Embodiment 1 of the present invention when the baffle is in the unfolded state;

[0035] Figure 4 This is a side view of Embodiment 1 of the present invention when the baffle is in the unfolded state;

[0036] Figure 5 This is a three-dimensional schematic diagram of Embodiment 2 of the present invention when the baffle is in the retracted state;

[0037] Figure 6 This is a side view of Embodiment 2 of the present invention when the baffle is in the unfolded state;

[0038] Figure 7 This is a schematic diagram of the connection structure between the drive device and the opening / closing door when the baffle is in the retracted state.

[0039] Figure 8 This is a schematic diagram of the connection structure between the drive device and the opening / closing door when the baffle is in the unfolded state according to the present invention;

[0040] Figure 9 This is a side view of the baffle of the present invention in the retracted state;

[0041] Figure 10 This is a front view of the baffle of the present invention in the retracted state;

[0042] Figure 11 This is a side view of the baffle of the present invention in the unfolded state;

[0043] Figure 12 This is the PQ curve of the integrated stove in the mid-range mode in this embodiment of the invention;

[0044] Figure 13 This is the PQ curve of the integrated stove at high speed in the embodiment of the present invention;

[0045] Figure 14 This is the PQ curve of the integrated stove in the stir-fry mode in this embodiment of the invention;

[0046] Figure 15 This is a block diagram of the electronic control system structure according to an embodiment of the present invention.

[0047] Reference numerals: 1. Tabletop; 2. Drive unit; 201. Drive shaft; 202. Stepper motor; 3. Baffle; 301. Fan-shaped plate; 302. Protrusion; 4. Vertical plate; 5. Opening and closing door; 6. Connecting plate; 7. Suction panel; 8. Suction port; 9. Top plate; 10. Air curtain assembly. Detailed implementation method:

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to 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 invention according to the specific circumstances.

[0049] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0050] Example 1

[0051] An integrated stove, such as Figure 1 , Figure 2 and Figure 3 As shown, the cabinet includes a countertop 1 at the top, a drive unit 2, a baffle 3, a vertical panel 4, a suction panel 7, and a top panel 9. A cooktop is mounted on the countertop 1, and a smoke exhaust duct is located within the cabinet beneath the countertop 1, housing a variable frequency smoke exhaust fan. The suction panel 7 is vertically positioned at the rear end of the upper surface of the countertop 1, with a vertical panel 4 on each side. The top panel 9 is located directly above the countertop 1, connected to the vertical panels 4 and the suction panel 7, and positioned at the top of both. The suction panel 7 has a horizontally elongated suction port 8, which is close to the top panel 9. The height of the suction port 8 from the top panel 9 is 10-48% of the height of the suction panel 7. For example, when the height of the suction panel 7 is 60cm, the height of the suction port 8 from the top panel 9 is between 6cm and 28.8cm. A smoke exhaust duct is installed under the countertop 1, and a smoke exhaust fan is installed inside the duct. Smoke exhaust vents are located on the side wall of the cabinet under the countertop 1. When the integrated stove is working, the smoke exhaust fan starts, and cooking fumes are drawn in through the air intake vent 8 and discharged through the exhaust pipe connected to the exhaust vent. The top panel 9 is horizontally positioned or slopes downwards from front to back. The top panel 9 has a hollow structure and contains downward-facing lighting and an air curtain assembly 10 that generates an air curtain. The air curtain assembly 10 includes a variable frequency air curtain fan. An air curtain outlet is located on the bottom wall of the front end of the top panel 9, and the air curtain assembly 10 is positioned at the air curtain outlet to generate a downward air curtain. This air curtain covers 30-100% of the width of the countertop 1. For example, when the width of the countertop 1 is 60cm, the horizontal distance between the air curtain and the rear end of the countertop 1 is between 18cm and 60cm. By installing the air curtain assembly 10, the escape of cooking fumes can be better prevented. A light hole is provided on the bottom wall of the front end of the top plate 9, located behind the air curtain outlet, and the lighting is installed at this light hole.

[0052] As shown in Figures 1, 3, and 4. Figure 7 and Figure 8As shown, the upright plate 4 contains a receiving cavity, in which the driving device 2 and the baffle 3 are both located. The opening of the receiving cavity is a door 5, which serves as the exterior panel of the upright plate 4. When vertical, the door 5 completely conceals the receiving cavity. The driving device 2 is located at the upper end of the receiving cavity and includes a stepper motor 202 and a drive shaft 201. The drive shaft 201 is the output shaft of the stepper motor 202, and its exposed portion is semi-cylindrical. A connecting plate 6 is vertically mounted at one end of the door 5. The end of the connecting plate 6 furthest from the door 5 has a semi-cylindrical hole that matches the exposed portion of the drive shaft 201. The connecting plate 6 is fitted onto the drive shaft 201 through this semi-cylindrical hole. When the drive shaft 201 of the stepper motor 202 rotates, the connecting plate 6 drives the door 5 to rotate.

[0053] like Figure 3 , Figure 9 , Figure 10 and Figure 11 As shown, the baffle 3 is an expandable multi-panel fan-shaped structure, comprising multiple fan-shaped plates 301. These plates are nested sequentially from the outside in, with the innermost fan-shaped plate 301 connected to the opening / closing door 5. The tips of all fan-shaped plates 301 are hinged together on a single shaft. Except for the innermost fan-shaped plate 301, all other fan-shaped plates 301 must be hollow. The innermost fan-shaped plate 301 can be either hollow or solid. Except for the innermost fan-shaped plate 301, the inner walls of the other fan-shaped plates 301 are provided with arc-shaped grooves or arc-shaped holes. Except for the outermost fan-shaped plate 301, the outer walls of the other fan-shaped plates 301 are provided with protrusions 302 that engage with the arc-shaped grooves or arc-shaped holes of adjacent fan-shaped plates 301. When the stepper motor 202 drives the opening and closing door 5 to rotate via the connecting plate 6, the opening and closing door 5 drives the innermost sector plate 301 to rotate. When the protrusion 302 on the innermost sector plate 301 rotates to the end of the arc-shaped groove or arc-shaped hole provided on its outer sector plate 301, it will drive this sector plate 301 to rotate. In this way, other outermost sector plates 301 can be rotated in sequence, thus unfolding the baffle 3. When the opening and closing door 5 is rotated to the working state, the baffle 3 unfolds to form a baffle surface. The baffle surface is vertical, and the sector angle of the baffle 3 after unfolding is 30-90 degrees, specifically 30 degrees, 45 degrees, 60 degrees, 70 degrees, 75 degrees, 90 degrees, etc. The stepper motor 202 can precisely control the rotation angle, which can realize the precise unfolding and retraction of the baffle 3, and can drive the opening and closing door 5 to precisely and completely cover the receiving cavity of the vertical plate 4.

[0054] Example 2

[0055] An integrated stove, such as Figure 5 and Figure 6As shown, the cabinet includes a countertop 1 at the top, a drive unit 2, a baffle 3, a vertical panel 4, a suction panel 7, and a top panel 9. A cooktop is mounted on the countertop 1. The suction panel 7 is vertically positioned at the rear end of the upper surface of the countertop 1, with a vertical panel 4 on each side of the suction panel 7. The top panel 9 is located directly above the countertop 1, connected to the vertical panels 4 and the suction panel 7, and positioned at the top of both. The suction panel 7 has a horizontally elongated suction port 8, which is close to the countertop 1 and at a height of 10-48% of the height of the suction panel 7. For example, when the height of the suction panel 7 is 70cm, the height of the suction port 8 from the countertop 1 is between 7cm and 33.6cm. A smoke exhaust duct is installed under the countertop 1, and a smoke exhaust fan is installed inside the duct. Smoke exhaust vents are located on the side wall of the cabinet under the countertop 1. When the integrated stove is working, the smoke exhaust fan starts, and cooking fumes are drawn in through the air intake vent 8 and exhausted through the exhaust pipe connected to the exhaust vent. The top panel 9 is horizontally positioned or slopes downwards from front to back. The top panel 9 has a hollow structure and contains downward-facing lighting and an air curtain assembly 10 that generates an air curtain. An air curtain outlet is located on the bottom front wall of the top panel 9, and the air curtain assembly 10 is positioned at the air curtain outlet to generate a downward air curtain. This air curtain covers 30-100% of the width of the countertop 1. For example, when the width of the countertop 1 is 60cm, the horizontal distance between the air curtain and the rear end of the countertop 1 is between 18cm and 60cm. By installing the air curtain assembly 10, the escape of cooking fumes can be better prevented. A light hole is provided on the bottom wall of the front end of the top plate 9, located behind the air curtain outlet, and the lighting is installed at this light hole.

[0056] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the vertical plate 4 contains a cavity, in which the drive device 2 and the baffle 3 are both located. The opening of the cavity is a door 5, which serves as the exterior panel of the vertical plate 4. When vertical, the door 5 completely conceals the cavity. The drive device 2 is located at the lower end of the cavity and includes a stepper motor 202 and a drive shaft 201. The drive shaft 201 is the output shaft of the stepper motor 202, or it could be the output shaft of a reducer connected to the stepper motor 202. The exposed portion of the drive shaft 201 is semi-cylindrical. A connecting plate 6 is vertically mounted on one end of the door 5. The end of the connecting plate 6 furthest from the door 5 has a semi-cylindrical hole that matches the exposed portion of the drive shaft 201. The connecting plate 6 is fitted onto the drive shaft 201 through this semi-cylindrical hole. When the stepper motor 202 starts, its drive shaft 201 drives the connecting plate 6 to rotate, which in turn drives the door 5 to rotate.

[0057] As shown in Figures 5, 6, and 9. Figure 10 and Figure 11As shown, the baffle 3 is an expandable multi-panel fan-shaped structure, comprising multiple fan-shaped plates 301. These plates are nested sequentially from the outside in, with the innermost fan-shaped plate 301 connected to the opening / closing door 5. The tips of all fan-shaped plates 301 are hinged together on a single shaft. Except for the innermost fan-shaped plate 301, all other fan-shaped plates 301 must be hollow. The innermost fan-shaped plate 301 can be either hollow or solid. Except for the innermost fan-shaped plate 301, the inner walls of the other fan-shaped plates 301 are provided with arc-shaped grooves or arc-shaped holes. Except for the outermost fan-shaped plate 301, the outer walls of the other fan-shaped plates 301 are provided with protrusions 302 that engage with the arc-shaped grooves or arc-shaped holes of adjacent fan-shaped plates 301. When the stepper motor 202 drives the opening and closing door 5 to rotate via the connecting plate 6, the opening and closing door 5 drives the innermost sector plate 301 to rotate. When the protrusion 302 on the innermost sector plate 301 rotates to the end of the arc-shaped groove or arc-shaped hole provided on its outer sector plate 301, it will drive this sector plate 301 to rotate. In this way, other outermost sector plates 301 can be rotated in sequence, thus unfolding the baffle 3. When the opening and closing door 5 is rotated to the working state, the baffle 3 unfolds to form a baffle surface. The baffle surface is vertical, and the sector angle of the baffle 3 after unfolding is 30-90 degrees, specifically 30 degrees, 45 degrees, 60 degrees, 75 degrees, 90 degrees, etc. The stepper motor 202 can precisely control the rotation angle, which can realize the precise unfolding and retraction of the baffle 3, and can drive the opening and closing door 5 to precisely and completely cover the receiving cavity of the vertical plate 4.

[0058] The integrated stove proposed in this invention has two states: working and non-working. The baffle 3 has two states: unfolded and retracted. When the invention is in the working state, the drive device 2 drives the baffle 3 to unfold via the opening and closing door 5. At this time, the exhaust fan is also in working state. Under the action of the exhaust fan, negative pressure is generated at the air intake 8. The baffle 3, the vertical plate 4, the air intake panel 7, and the top plate 9 form a negative pressure area. Cooking fumes are drawn in through the air intake 8, and airflow from outside the negative pressure area also flows into the air intake 8 through at least one end face of the baffle 3. At this time, the air curtain assembly 10 is activated, generating a downward air curtain. The baffle 3, the vertical plate 4, the air intake panel 7, the top plate 9, and the air curtain surface together form the negative pressure area. When the invention is in the non-working state, the drive device 2 drives the baffle 3 to retract into the receiving cavity of the vertical plate 4 via the opening and closing door 5. The baffle 3 is in the retracted state, and the opening and closing door 5 is in a vertical position and completely covers the receiving cavity.

[0059] In summary, this invention features an expandable and retractable baffle 3. When the integrated stove is in operation, the baffle 3 expands to effectively prevent oil fumes from escaping. When the integrated stove is not in operation, the baffle 3 retracts, preserving the aesthetics of the integrated stove. Furthermore, this invention also includes an air curtain assembly 10, which generates a downward air curtain. When the baffle 3 expands, it works in conjunction with the air curtain to better prevent oil fumes from spreading.

[0060] like Figure 15 As shown, the integrated stove also includes an MCU chip, an air quality detection device, a power storage module, and a timing module. The air quality detection device has a PM2.5 detection module and a draft module. The draft module draws air from the environment surrounding the integrated stove to the PM2.5 detection module. The PM2.5 detection module, draft module, drive device, timing module, exhaust fan, and air curtain fan are all electrically connected to the integrated stove's MCU chip. The power storage module can be a rechargeable battery, dry cell battery, etc., and supplies power to the MCU chip and timing module.

[0061] Traditional integrated cooktops use a constant power and / or constant speed design, meaning that the exhaust fan motor operates at a constant power or constant speed at the same setting. Currently, all integrated cooktop manufacturers advertise large exhaust volumes, ranging from 16 cubic meters per minute to 20, 24, or even 26 cubic meters per minute. While these large exhaust volumes meet national standards for space ventilation, without proper airflow organization, even large volumes cannot effectively reduce oil fume pollution or control airflow direction at the mouth and nose. Furthermore, they consume more electricity, resulting in lower social benefits. In actual use, the exhaust performance of an integrated cooktop is affected by the air pressure in the shared flue. This air pressure is called back pressure. When the back pressure is low, the integrated cooktop only needs lower power to achieve a higher airflow to meet the exhaust requirements; when the back pressure is high, the integrated cooktop needs to increase power to maintain the airflow. In this embodiment, the integrated stove is also equipped with a back pressure detection module, which is used to detect the magnitude of the back pressure. The back pressure detection module is electrically connected to the MCU chip and transmits the detected back pressure to the MCU chip.

[0062] In this embodiment, the integrated stove has three speed settings: medium, high, and high-heat. The number of speed settings is not limited to three; it can also be four or more, depending on the actual product requirements. When the integrated stove has four speed settings, they can be named low, medium, high, and high-heat. Using airflow Q as the horizontal axis and back pressure P as the vertical axis, PQ curves for the three speed settings were designed. The PQ curves for the medium, high, and high-heat settings are shown below. Figure 12 , Figure 13 and Figure 14 As shown.

[0063] At the medium setting, the air volume is 10.5 m³ / min under a back pressure of 0-35 Pa; the air volume is 10.5 m³ / min under a back pressure of 35-250 Pa; and the air volume drops back to 10.5 m³ / min under a back pressure of 250-300 Pa.

[0064] At the high setting, the air volume is 11.5 m³ / min under a back pressure of 0-35 Pa; 12 m³ / min under a back pressure of 35-250 Pa; and drops back to 11.5 m³ / min under a back pressure of 250-300 Pa.

[0065] When using the stir-fry setting, the air volume is 13 m³ / min under a back pressure of 0-35 Pa; 13.5 m³ / min under a back pressure of 35-250 Pa; and the air volume drops back to 13 m³ / min under a back pressure of 250-300 Pa.

[0066] The design concept of the PQ curves for the three levels is the same, which are mainly divided into three segments: 0-35Pa: low back pressure and low air volume area, using constant air volume algorithm control; 35-250Pa: medium and high back pressure and large air volume area, using constant air volume algorithm control; and above 250Pa, high back pressure area, switching from constant air volume algorithm control to constant power control.

[0067] The constant air volume algorithm is designed based on its underlying physical principles. According to the analysis of the physical model of the fan, at the same air volume, the relationship between the motor power P and the speed n satisfies the following formula:

[0068] P = An 3 +Bn 2 +Cn+D

[0069] In the formula, P represents the power of the exhaust fan motor, n represents the motor speed, and A, B, C, and D are coefficients. Different air volumes correspond to different sets of coefficients. By measuring the parameters of the integrated stove system, data such as air volume, speed, and power are obtained for each air volume setting under a back pressure of 0-250Pa. By calculating these corresponding coefficients, the relationship between power P and fan speed n can be obtained, thereby achieving the goal of constant air volume control.

[0070] Specifically, experiments were conducted using a prototype of the integrated stove to calculate the specific values ​​of four coefficients (A, B, C, and D) corresponding to the target airflow at each speed setting of the exhaust fan. These values ​​were then stored in the integrated stove's MCU chip. The exhaust fan speed was then controlled through the following steps:

[0071] Step 1: Input the target air volume setting value and output power P1 according to 0Pa back pressure;

[0072] Step 2: After the exhaust fan motor reaches a stable operating power of P1, the actual operating speed n of the exhaust fan motor is calculated in real time by collecting the current curve of the exhaust fan motor.

[0073] Step 3: Using the formula

[0074] P = An 3 +Bn 2+Cn+D

[0075] Calculate the power P2 corresponding to the current speed of the exhaust fan motor. If P2 is greater than P1, increase P1 by 1-5 watts, specifically 1 watt, 2 watts, 3.5 watts, 5 watts, etc.; if P2 is less than P1, decrease P1 by 1-5 watts, specifically 1 watt, 2 watts, 3.5 watts, 5 watts, etc.

[0076] Step 4: Output the adjusted P1 value to the motor of the smoke exhaust fan to obtain the new speed n of the smoke exhaust fan motor;

[0077] Step 5: Continuously repeat steps 3 and 4 until the exhaust fan motor operates at a state where the difference between P1 and P2 is less than 0.5-2 watts. This is a continuous feedback operation process, which remains dynamic. Therefore, the operation of the exhaust fan does not strictly follow the PQ curve, but constantly fluctuates up and down based on the PQ curve as a standard.

[0078] As mentioned above, the control of the exhaust fan is divided into target air volume control and target power control, which we refer to as the target air volume control unit and target power control unit, or the target air volume control segment and target power control segment, or the constant air volume segment and constant power segment. The target power control unit and target air volume control unit switch within a certain back pressure range. In this embodiment, the switching is based on a back pressure of 250 Pa. However, this switching back pressure value is not required to be exactly 250 Pa; it can be within the range of 150-450 Pa. As shown in the PQ curve, the back pressure corresponding to the target power control unit is higher than that corresponding to the target air volume control unit, or in other words, the back pressure corresponding to the constant power segment is higher than that corresponding to the constant air volume segment. When designing the constant air volume segment, the wind speed at the air intake 8 should be considered, requiring the wind speed at the air intake 8 in the constant air volume segment to be between 7 m / s and 13 m / s. When the wind speed at the air intake 8 exceeds 13 m / s, it will cause excessive noise exceeding national standards. Integrated cooktops typically operate at a constant airflow rate, preventing excessive noise levels from exceeding national standards. Furthermore, when the air velocity at intake vent 8 exceeds 13 meters per second, it creates excessive negative pressure at intake vent 8, hindering the downward airflow from the air curtain component and weakening its ability to prevent oil fumes from escaping.

[0079] In the target air volume control unit, the speed of the exhaust fan is controlled to ensure that the exhaust fan operates at a relatively stable power output and air volume under different back pressures. Relatively stable air volume means that different target exhaust volumes are used depending on the exhaust fan's speed setting; the higher the fan speed, the higher the target air volume, and the actual exhaust volume generated by the exhaust fan is within ±15% of the target air volume. In this embodiment, the back pressure range of the target air volume control unit is 0-250 Pa. When the back pressure value is switched to 300 Pa, the pressure range of the target air volume control unit becomes 0-300 Pa.

[0080] In the target power control unit, the higher the speed of the exhaust fan, the higher the target power. The target power control unit controls the speed of the exhaust fan to ensure it operates at a relatively stable power level for the corresponding air volume under different back pressures. Relatively stable power means the operating power is within ±8% of the actual constant power operating range.

[0081] This invention can automatically control its operation by setting a control program in the MCU chip. The specific control method is as follows:

[0082] When the integrated stove is turned on, its MCU chip automatically sets the PM2.5 threshold. The PM2.5 threshold setting is performed as follows: First, the MCU chip controls the activation of the PM2.5 detection module and the air intake module. The air intake module draws air from the environment surrounding the integrated stove to the PM2.5 detection module, which detects the PM2.5 concentration P1 in the environment and transmits the result P1 to the MCU chip. Second, the MCU chip sets the PM2.5 threshold based on the detection result from the PM2.5 detection module. Let the PM2.5 threshold set by the MCU chip be P, then P = P1 + P2, where P2 satisfies: 10 micrograms / cubic meter ≤ P2 ≤ 20 micrograms / cubic meter. If the PM2.5 detection module detects a PM2.5 concentration P1 of 15 micrograms per cubic meter in the environment where the integrated stove is located, then the PM2.5 threshold P set by the MCU chip is between 25 micrograms per cubic meter and 35 micrograms per cubic meter, and the specific values ​​can be 25 micrograms per cubic meter, 28 micrograms per cubic meter, 31.6 micrograms per cubic meter, 35 micrograms per cubic meter, etc.

[0083] Furthermore, the MCU chip retrieves time data from the timing module once when the integrated stove starts working and once when it stops working. When the integrated stove is started, the MCU chip automatically sets the PM2.5 threshold. The MCU chip detects and calculates the time difference T between this time and the last time the integrated stove stopped operating. When T ≤ 30 minutes, the MCU chip sets the PM2.5 threshold to the same level as the previous threshold. When T > 30 minutes, the PM2.5 threshold is set according to the second step mentioned above. This prevents cooking fumes from escaping into the environment around the integrated stove and failing to dissipate quickly enough, which could lead to an excessively high PM2.5 threshold. An excessively high PM2.5 threshold would cause continuous fumes to escape, placing cooks in a highly polluted environment, which is detrimental to their health and also pollutes the surrounding environment.

[0084] After setting the PM2.5 threshold, this setting function is turned off. The PM2.5 detection module continuously monitors the PM2.5 concentration in the environment where the integrated stove is located and continuously transmits the detection results to the MCU chip. The MCU chip compares the received PM2.5 concentration with the set PM2.5 threshold, and based on the comparison result and back pressure, that is, whether the exhaust fan is in the constant air volume or constant power range, it performs the following actions.

[0085] First is the constant air volume section:

[0086] A. When the detected PM2.5 concentration exceeds the PM2.5 threshold, but the excess value is less than or equal to 15 micrograms per cubic meter, the MCU chip will adjust the exhaust fan to medium speed and the baffle will be opened 30 degrees.

[0087] B. When the PM2.5 concentration is detected to exceed the PM2.5 threshold, and the excess value is greater than 15 micrograms per cubic meter, the exhaust fan will maintain the medium speed operation, and the MCU chip will simultaneously control the air curtain speed to increase to 65% of the maximum speed, and the baffle will be opened at 45 degrees.

[0088] C. When the PM2.5 concentration is detected to exceed the PM2.5 threshold and the excess value is greater than 30 micrograms per cubic meter, the MCU chip will adjust the exhaust fan to high speed and at the same time control the air curtain speed to increase to 80% of the maximum speed, and the baffle will open to 70 degrees.

[0089] D. When the PM2.5 concentration is detected to exceed the PM2.5 threshold and the excess value is greater than 45 micrograms per cubic meter, the MCU chip will adjust the exhaust fan to the high-speed setting and simultaneously control the air curtain speed to increase to the maximum speed, and the baffle will open 90 degrees.

[0090] E. When the PM2.5 concentration is detected to exceed the PM2.5 threshold, and the excess value is greater than 60 micrograms per cubic meter, the MCU chip will adjust the exhaust fan to high speed, maintain the air curtain speed at maximum speed, and open the baffle to 90 degrees.

[0091] As the exhaust fan speed and air curtain speed increase, the escape of cooking fumes decreases. Some of the escaped fumes are drawn away by the exhaust fan, while some dissipate. The PM2.5 concentration in the environment around the integrated stove gradually decreases. When the PM2.5 concentration detected by the air quality monitoring device decreases to the next level, at levels B, C, and D, the exhaust fan speed and air curtain speed are maintained at the current level for 20-40 seconds before being adjusted to the next level. This effectively reduces the escape of cooking fumes and prevents frequent speed switching between the exhaust fan and air curtain fan, which could lead to unstable operation of the integrated stove. If the effect of reducing escaped fumes is not achieved at level D, one possible reason is that the exhaust fan's airflow is too high, resulting in excessively high air velocity at the air intake vent, affecting the normal organization of the air curtain airflow. At this point, the air velocity at air intake vent 8 can be reduced by lowering the exhaust fan speed, thus ensuring the air curtain functions properly and effectively prevents fumes from escaping. The progression from level C to level D, and then to level E, rather than directly from level C to level E, is due to considerations of the back pressure in the common flue. The high airflow of the level D exhaust fan effectively further clears the common flue and reduces back pressure. When the back pressure is low, the integrated stove only needs lower power to achieve a higher airflow to meet the exhaust requirements. In level E, when the PM2.5 concentration detected by the air quality monitoring device decreases to level C, the exhaust fan speed and air curtain speed are maintained at this level for 20-40 seconds before being adjusted back to level C.

[0092] Furthermore, there is the constant power segment:

[0093] In the constant power range, when the detected PM2.5 concentration exceeds the PM2.5 threshold, the MCU chip automatically controls the smoke exhaust fan and air curtain fan to operate in the following manner:

[0094] A1. When the value exceeds 15 micrograms per cubic meter or less, the smoke exhaust fan should be set to medium speed, the air curtain fan should be set to 75% of the maximum wind speed, and the baffle should be opened to 60 degrees.

[0095] B1. When the value exceeds 15 micrograms per cubic meter, the smoke exhaust fan is adjusted to the high setting, the air curtain speed is increased to 90% of the maximum speed, and the baffle is opened to 75 degrees.

[0096] C1. When the value exceeds 30 micrograms per cubic meter, the exhaust fan is set to the high-speed setting, the air curtain speed is increased to the maximum speed, and the baffle is opened 90 degrees.

[0097] D1. When the value exceeds 45 micrograms per cubic meter, the exhaust fan should be set to high speed, the air curtain speed should be kept at maximum speed, and the baffle should be opened to 90 degrees.

[0098] In the constant power range, high back pressure can lead to poor smoke extraction in the common flue. This can be mitigated by increasing the air curtain velocity to improve the integrated stove's ability to prevent smoke escape. When the exhaust fan switches from the constant power range to the constant airflow range, to fully open up the common flue, more effectively reduce back pressure, and achieve stable operation in the constant airflow range, first set the exhaust fan to the high-heat setting and run it for 30 seconds, then operate it according to the five-level (A, B, C, D, E) mode.

[0099] The integrated stove proposed in this invention can be set to two working modes: one is manual control of the exhaust fan and air curtain fan, and the other is automatic control of the exhaust fan and air curtain fan. When the exhaust fan and air curtain fan are automatically controlled, the integrated stove can automatically adjust according to the cooking progress and the amount of escaping fumes without the need for manual intervention. This effectively avoids the problem of fumes escaping due to the cook's inability to adjust the exhaust fan and air curtain fan in a timely manner.

[0100] In some embodiments, a smoke sensor is also provided in the fume extraction duct. The smoke sensor has an infrared emitting hole and an infrared receiving hole arranged in parallel. An infrared emitting head emits infrared rays outward from the infrared emitting hole. After being reflected by smoke and moisture in the duct, part of the infrared rays reflected by the smoke enter the infrared detection probe through the infrared receiving hole. A convex lens is provided in the optical path from the infrared receiving hole to the infrared detection probe. The radius of the circular surface of the convex lens is 1.5 to 2.3 times the distance between the convex lens and the infrared detection probe.

[0101] Based on the smoke detection data sent to the controller by the smoke sensor, the smoke detection data is compared with the PM2.5 detection data. When the smoke detection data is greater than the PM2.5 detection data, the initial fan speed of the current exhaust fan is maintained. When the smoke detection data is less than the PM2.5 detection data, the fan speed is increased to the maximum value and maintained for at least 120 seconds. Then, the PM2.5 value and the smoke detection data value are detected. If the PM2.5 value is lower than 120 seconds ago, while the smoke detection data is higher than 120 seconds ago, the fan speed is maintained at the maximum value for another 120 seconds. When the PM2.5 value is lower than the minimum threshold, or when the PM2.5 and smoke detection values ​​are close to the same (i.e., the difference between the two is less than ±5%), the fan speed returns to the initial fan speed at which the control was started.

[0102] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An integrated stove, comprising a cabinet, characterized in that: it includes an air quality detection device for detecting pollutants escaping to the outside of an air curtain; the integrated stove has an air intake panel with an air intake on the panel; a horizontally arranged top plate is located on the top of the air intake panel; an air curtain is formed downwards on the front side of the top plate; the air curtain forms a downward-flowing air curtain surface; the air curtain surface, the top plate, and the air intake panel enclose a negative pressure area; the air intake is connected to a smoke exhaust duct inside the cabinet; a variable frequency smoke exhaust fan is installed in the smoke exhaust duct; the rotational speed of the smoke exhaust fan is positively correlated with the detection value of the air quality detection device; in, On the left and right sides of the air intake panel, there are baffles with variable area. The baffles are arranged in a fan shape, and the fan angle after the baffles are unfolded is 0-90 degrees. The baffles are connected to a driving device, and the size of the unfolding angle of the baffles driven by the driving device is positively correlated with the detection value of the air quality detection device.

2. The integrated stove according to claim 1, characterized in that: The upper part of the cabinet is a countertop, and a vertical plate is provided on each of the left and right sides of the suction panel on the countertop. The vertical plate contains a receiving cavity, and the baffle is located in the receiving cavity when it is retracted. An opening and closing door is provided on the vertical plate, which is the outer panel of the vertical plate. The opening and closing door is connected to the drive device. In the storage state, the opening and closing door is vertically arranged and covers the receiving cavity.

3. An integrated stove according to claim 2, characterized in that: The driving device is disposed within the accommodating cavity and connected to the inner wall of the accommodating cavity. The driving device includes a stepper motor and a drive shaft. The stepper motor drives the drive shaft to rotate. The drive shaft is connected to the opening and closing door and drives the opening and closing door to rotate. The mounting part of the drive shaft is semi-cylindrical. A connecting plate is vertically disposed at one end of the opening and closing door. The end of the connecting plate away from the opening and closing door is provided with a semi-cylindrical hole that matches the mounting part of the drive shaft. The connecting plate is sleeved on the drive shaft through the semi-cylindrical hole. The baffle includes multiple sector plates, which are sequentially sleeved from the outside to the inside. The innermost sector plate is connected to the opening and closing door. The tips of all sector plates are hinged together on a shaft. Except for the innermost sector plate, the inner walls of the other sector plates are provided with arc-shaped grooves or arc-shaped holes. Except for the outermost sector plate, the outer walls of the other sector plates are provided with protrusions that fit into the arc-shaped grooves or arc-shaped holes of adjacent sector plates.

4. A control method for an integrated stove, used in the integrated cover as described in any one of claims 1-3, characterized in that: When the integrated stove is turned on, the MCU chip of the integrated stove automatically sets the PM2.5 threshold. The air quality detection device has a PM2.5 detection module. The air quality detection device detects the PM2.5 concentration that escapes from the negative pressure area and compares it with the PM2.5 threshold set in the MCU chip of the integrated stove. When the detected PM2.5 concentration exceeds the PM2.5 threshold, the MCU chip automatically controls the exhaust fan and / or air curtain fan to increase the speed and automatically controls the drive device to drive the baffle to unfold.

5. The control method for an integrated stove according to claim 4, characterized in that: When the detected PM2.5 concentration exceeds the PM2.5 threshold, the following actions will be taken based on the comparison results: A. When the value exceeds 15 micrograms per cubic meter or less, the exhaust fan should be set to medium speed and the baffle should be opened to 30 degrees. B. When the value exceeds 15 micrograms per cubic meter, the wind curtain speed is adjusted to 65% of the maximum wind speed, and the baffle is opened at 45 degrees. C. When the value exceeds 30 micrograms per cubic meter, the smoke exhaust fan is adjusted to the high setting, the air curtain speed is increased to 80% of the maximum speed, and the baffle is opened to 70 degrees. D. When the value exceeds 45 micrograms per cubic meter, the exhaust fan is set to the high-speed setting, the air curtain speed is increased to the maximum speed, and the baffle is opened 90 degrees. E. When the PM2.5 concentration is detected to exceed the PM2.5 threshold, and the excess value is greater than 60 micrograms per cubic meter, the exhaust fan is adjusted to high speed, the air curtain speed is kept at maximum speed, and the baffle is opened to 90 degrees. At levels B, C, and D, when the PM2.5 concentration detected by the air quality monitoring device decreases to the level above, the exhaust fan speed, air curtain speed, and baffle opening angle are maintained at the current level for 20-40 seconds before being adjusted to the level above. At level E, when the PM2.5 concentration detected by the air quality monitoring device decreases to level C, the exhaust fan speed, air curtain speed, and baffle opening angle are maintained at the current level for 20-40 seconds before being adjusted to level C.

6. A control method for an integrated stove according to claim 4 or 5, characterized in that: The integrated stove has a back pressure detection module, and the exhaust fan has a constant air volume segment and a constant power segment. The constant air volume segment and the constant power segment can be switched within a certain back pressure range, which is 150-450 Pa. The back pressure corresponding to the constant power segment is higher than the back pressure corresponding to the constant air volume segment. In the constant airflow range, when the detected PM2.5 concentration exceeds the PM2.5 threshold, the MCU chip controls the exhaust fan, air curtain fan, and drive device to operate in five levels: A, B, C, D, and E. In levels B, C, and D, when the PM2.5 concentration detected by the air quality detection device decreases to the next level, the exhaust fan speed, air curtain speed, and baffle opening angle are maintained at the current level for 20-40 seconds before being adjusted to the next level. In level E, the exhaust fan speed, air curtain speed, and baffle opening angle are maintained at the current level for 20-40 seconds before being adjusted to level C. In the constant power range, when the detected PM2.5 concentration exceeds the PM2.5 threshold, the MCU chip automatically controls the smoke exhaust fan and air curtain fan to operate in the following manner: A1. When the value exceeds 15 micrograms per cubic meter or less, the smoke exhaust fan should be set to medium speed, the air curtain fan should be set to 75% of the maximum wind speed, and the baffle should be opened to 60 degrees. B1. When the value exceeds 15 micrograms per cubic meter, the smoke exhaust fan is adjusted to the high setting, the air curtain speed is increased to 90% of the maximum speed, and the baffle is opened to 75 degrees. C1. When the value exceeds 30 micrograms per cubic meter, the exhaust fan is set to the high-speed setting, the air curtain speed is increased to the maximum speed, and the baffle is opened 90 degrees. D1. When the value exceeds 45 micrograms per cubic meter, the smoke exhaust fan should be set to high speed, the air curtain speed should be kept at maximum speed, and the baffle should be opened 90 degrees. When the exhaust fan switches from the constant power setting to the constant air volume setting, first adjust the exhaust fan to the stir-fry setting and run it for 30 seconds, then run it according to the five-level mode A, B, C, D, and E.

7. The control method for an integrated stove according to claim 6, characterized in that: In the constant air volume range, the air velocity at the air intake is 7-13 meters per second.

8. The control method for an integrated stove according to claim 5, characterized in that: After starting the integrated stove, set the PM2.5 threshold for the MCU chip as follows: S1. The MCU chip controls the start of the air quality detection device. The PM2.5 detection module of the air quality detection device detects the PM2.5 concentration in the environment where the integrated stove is located and transmits the detection result P1 to the MCU chip. S2. The PM2.5 threshold set by the MCU chip is P, then P = P1 + P2, and P2 satisfies: 10 micrograms / cubic meter ≤ P2 ≤ 20 micrograms / cubic meter.

9. The control method for an integrated stove according to claim 8, characterized in that: The integrated stove is equipped with a power storage module and a timing module. The power storage module supplies power to the MCU chip and the timing module, and the timing module is electrically connected to the MCU chip. When the integrated stove starts working and stops working, the MCU chip obtains time data from the timing module. When the integrated stove is started, and the MCU chip automatically sets the PM2.5 threshold, the MCU chip detects and calculates the time difference T between this time and the last time the integrated stove stopped operating. When T ≤ 30 minutes, the MCU chip sets the current PM2.5 threshold to the same as the previous PM2.5 threshold. When T > 30 minutes, the PM2.5 threshold is set according to the following method: S1. The MCU chip controls the start of the air quality detection device. The PM2.5 detection module of the air quality detection device detects the PM2.5 concentration in the environment where the integrated stove is located and transmits the detection result P1 to the MCU chip. S2. The PM2.5 threshold set by the MCU chip is P, then P = P1 + P2, and P2 satisfies: 10 micrograms / cubic meter ≤ P2 ≤ 20 micrograms / cubic meter.

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