An integrated stove with vortex control capability, its control method and application

Abstract

This invention discloses an integrated stove with vortex entrainment and control capabilities, its control method, and its application. The integrated stove includes: an integrated stove body, an integrated stove head, a head baffle, a volute, an impeller, an upper air duct, and a lower air duct. The integrated stove head includes a head air inlet, a head first guide plate, and a head second guide plate. The profiles of the head second guide plate and the volute are determined using a multi-objective optimization method, improving the flow lines of the oil fumes, reducing energy loss, thereby enhancing the entrainment and smoke collection effect of the air inlet, resulting in faster flow velocity and improved oil fume extraction. This invention, through the joint optimization design of the integrated stove head guide plate and the volute, forms a pressure gradient distribution at different levels of the external flow field of the integrated stove, thereby creating a four-vortex entrainment effect and solving the problem of oil fume escape.

Description

Technical Field

[0001] This invention belongs to the field of range hoods / integrated cooktops, and particularly relates to an integrated cooktop with suction and vortex control capabilities, its control method, and its application. Background Technology

[0002] The large amount of PM2.5 produced in the kitchen, also known as fine particulate matter, refers to particulate matter in the atmosphere with a diameter of 2.5 micrometers or less, less than 1 / 20th the diameter of a human hair. Although cooking fumes and PM2.5 are invisible, if the range hood / integrated stove's smoke collection ability is not strong enough, they can enter our respiratory tract and cause harm to our health.

[0003] When using a regular range hood or integrated cooktop for daily cooking, housewives inhale more than 100 times the PM2.5 levels of fresh outdoor air. This is because incomplete combustion of fuel produces harmful nitrogen monoxide, and cooking fumes and nitrogen oxides generated during fuel combustion are also harmful substances. Air pollution is very serious; long-term exposure to this pollutant can lead to its accumulation in the bronchi and trachea, worsening symptoms of rhinitis or bronchitis and significantly impacting the respiratory system.

[0004] Traditional kitchen range hoods and integrated cooktops have very low upward air velocity within a short distance below the air intake, resulting in insufficient upward suction. Therefore, they are easily affected by turbulent airflow from open windows, people walking around, fans, or air conditioners, further reducing the effective fume capture area to a very small size. As a result, the fumes produced during cooking escape with the turbulent airflow, endangering the health of those cooking in the kitchen.

[0005] Therefore, in order to solve the above-mentioned problems, the present invention utilizes the principle of gas dynamics to provide an integrated stove with vortex control capability, its control method and application, so as to overcome the defects in the prior art. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention provides an integrated stove with vortex control capability, its control method, and its application.

[0007] The present invention is implemented as follows: a control method and application for an integrated stove with suction and vortex control capability includes: an integrated stove body, an integrated stove head, a head baffle, a volute, an impeller, an upper air duct, and a lower air duct; the volute is disposed in the integrated stove body and connects the upper air duct and the lower air duct, and an impeller is disposed inside the volute.

[0008] The device body includes a stove;

[0009] The integrated stove head includes a head air inlet, a head first guide plate, and a head second guide plate;

[0010] The profiles of the second guide vane and the volute were determined using a multi-objective optimization method, which improved the flow lines of the fumes, reduced energy loss, and thus enhanced the suction and fume collection effect of the air inlet, resulting in faster flow and improved fume extraction.

[0011] As a further technical solution, the head second guide plate device is parametrically fitted using B-spline curves. Points P1, P3, P5, P6, P7, and P8 are fixed points of the integrated stove head, P2 and P4 are control points of the head second guide plate, point P1 is the starting point of the head second guide plate, point P3 is the fixed point at the rear top of the head second guide plate, and P6 and P7 are the fixed points at the bottom of the head second guide plate. With P6 as the origin of the coordinate system, P6P7 as the X-axis, P6P3 as the Y-axis, and points P7 and P8 as fixed points of the integrated stove head, the distance between points P7 and P8 is H1, and the distance between points P6 and P7 is H2, where H2 = 1 / 8H1.

[0012] Point P1 is the fixed point of the integrated stove head. A ray P1P2 is generated from P1 and is tangent to the second guide plate of the head. A ray P3P2 is generated from P3 and is tangent to the second guide plate of the head. The two rays intersect at P2.

[0013] A tangent ray P3P4 originates from P3 and another tangent ray P5P4 originates from P5 and intersects at P4; the perpendicular distance in the Y direction between points P5 and P6 is H3, and the perpendicular distance in the Y direction between points P3 and P5 is H4; H3 = 5 / 4H1, H4 = 4 / 5H1;

[0014] Let points a, b, c, d, and g enclose a region M; control points P2 and P4 move within region M, point d lies on line segment ce, and the length of line segment cd is equal to half the length of line segment ce.

[0015] Given the control points P2 and P4, a non-uniform quadratic B-spline node vector is generated using the Hartley-Judd algorithm. To meet the computational requirements, k = 3 is required. The Hartley-Judd algorithm ensures the continuity of the non-uniform B-spline curve. Furthermore, by considering the sum of the sides of the polygon formed by the control points, the node lengths within the domain are normalized to obtain the node vector. Specifically, the node interval lengths within the domain are calculated using the following formula:

[0016]

[0017] In the formula: l j To control the side length of the polygon, l j =|P i -Pi-1 |, where P i With P i-1 Let l be the coordinates of the control point. j Control point P i With control point P i-1 The spacing, j = 1, 2, ..., n; thus, the node values ​​are obtained as follows: In the formula t k =0,t n+1 =1, i = k+1, k+2, ..., n+1, where n is the total number of control vertices minus 1;

[0018] Based on the calculated node vectors, the basis function F is calculated using the de Boor-Cox recursive formula. i,k (t), divide the interval into m parts, thus obtaining (m+1) distinct values ​​of t, where m and k satisfy the following equation to meet the control relationship:

[0019] m+1=n+k+2 (2)

[0020] Then, the points on the second guide vane profile in rectangular coordinates are obtained from the basis functions and control points; where the deBoor-Cox recursive formula is:

[0021]

[0022]

[0023]

[0024] In the formula F i,k In the double subscripts of (t), i = 0, 1, ..., n;

[0025] The profile function of the second guide vane at the head is determined as follows:

[0026]

[0027] In the formula: P i (i = 0, 1, ..., n) represents n+1 control points, and the polyline connecting these control points in sequence forms a B-spline control polygon; F i,k (t) is a (k-1)th degree B-spline basis function;

[0028] The design variables are established as a function of the head air inlet flow rate Q and the head air inlet wind speed V based on the approximate model. The accuracy of the established approximate model is evaluated based on the coefficient of determination, and the final approximate model is determined. The approximate model is optimized using an optimization algorithm. Based on the optimal solution obtained by optimization, the relevant parameters of the volute are determined. The final geometric model is then performed using 3D software, and numerical simulation is then conducted.

[0029] likeFigure 7 The diagram shows the parametric design of the volute. The profiles involved include the profiles at the volute tongue and the volute exit. A ray is drawn with the impeller center as the origin, intersecting the volute tongue profile at point M1, the 120° ray at point M3, and the 320° ray at point M4. A ray L2 is drawn tangent to the volute tongue from M1, and a ray L3 is drawn tangent to the volute profile from M3. Rays L2 and L3 intersect at point M2. M6 is the left endpoint of the volute exit. A ray L5 is drawn tangent to the volute profile from M4 and M6. The intersection of L5 and L6 is set as control point M5. B-spline curves are constructed with M1, M2, and M3 as control points, and similarly with M4, M5, and M6 as control points. These two spline curves can be used to characterize the profile changes at these two locations.

[0030] By parametrically describing the volute profile, the parameters selected for this invention are determined to be: volute tongue placement angle θ1, center distance L1, volute tongue radius R, and volute outlet tilt angle γ. These parameters control the changes in the profile. Considering the smooth connection of the constructed profile and taking into account the compact nature of the integrated stove fan housing, to ensure that the profile design does not exceed the housing's dimensions, the value ranges of the designed parameters are determined as follows:

[0031]

[0032] This paper selects the fan outlet flow rate Q and the fan far-field noise sound pressure level (SPL) value as optimization objectives, and establishes a multi-objective optimization function as shown in Equation 5. This invention mainly focuses on optimizing the four parameters involved for high flow rates and low far-field noise SPL:

[0033]

[0034] Based on an approximate model, a functional relationship is established between the design variables, the outlet flow rate Q, and the sound pressure level (SPL) of the far-field noise of the wind turbine. Multi-objective optimization design is carried out on the volute tongue and the outlet profile. Spatial samples are constructed by combining the optimized Latin hypercube test method, and a Kriging model is constructed at the same time to map the relationship between the design objectives and the optimization variables. The Kriging model is solved using the NSGA-II genetic algorithm. Based on the optimal solution obtained, the relevant parameters of the volute are determined. The final geometric model is then performed using 3D software, and numerical simulation is conducted.

[0035] As a further technical solution, when both the integrated cooktop head and the volute are optimized to their best performance, the four-vortex effect of the integrated cooktop head is optimal, and the smoke collection effect is also the best. Numerical simulations are performed using the optimized profile to measure the airflow Q and wind speed V at the head's air inlet. When both airflow Q and wind speed V reach their maximum values, the guide plate is considered optimal. When the integrated cooktop's airflow Q and air inlet wind speed V reach their maximum values, and the sound pressure level (SPL) reaches its minimum value, the volute and head are considered to be simultaneously optimized to their best performance.

[0036] As a further technical solution, the integrated stove head is also equipped with a PM2.5 detection device, which can display the PM2.5 value in real time.

[0037] As a further technical solution, the integrated stove is also equipped with a touch screen and a control unit, which is connected to a mobile phone cloud for remote control.

[0038] By employing the above-described technology, the beneficial effects of the present invention compared to the prior art are as follows:

[0039] 1. This invention achieves a pressure gradient distribution at different levels of the external flow field of the integrated stove by jointly optimizing the design of the guide plate and the volute at the head of the integrated stove, thereby forming a four-vortex suction effect and solving the problem of oil fume escape.

[0040] 2. This invention features detachable left and right baffles, which solves the problem of oil fume diffusion caused by opening windows for ventilation or people walking around during cooking;

[0041] 3. During cooking, the integrated stove of this invention generates a columnar vortex above the cookware, creating a strong suction above the pot, which gathers the oil fumes and makes them difficult to escape. At the same time, the high-speed airflow and strong negative pressure formed by the air inlet at the head can capture pollutant particles such as PM2.5, absorb the oil fumes, and reduce the harmful substances inhaled by the cook in the kitchen.

[0042] 4. The integrated stove of this invention achieves high wind speed and strong suction while maintaining low air volume and low noise, thus combining the characteristics of high wind speed and strong suction with reducing the noise of cooking. Attached Figure Description

[0043] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the integrated stove device of the present invention;

[0045] Figure 2This is a side view of the integrated stove device of the present invention;

[0046] Figure 3 This is a schematic diagram of the oil fume flow in the integrated stove of the present invention;

[0047] Figure 4 This is a schematic diagram of the air inlet at the head of the integrated stove of the present invention;

[0048] Figure 5 This is a parameterized schematic diagram of the integrated stove head guide plate of the present invention;

[0049] Figure 6 This is a side view of the head of the integrated stove of the present invention;

[0050] Figure 7 This is a schematic diagram of the parameterization of the volute of the present invention;

[0051] Figure 8 This is a schematic diagram of the eccentric vortex of the air inlet of the volute in numerical simulation of the unoptimized integrated stove head and volute of this invention.

[0052] Figure 9 This is a schematic diagram of the positive vortex of the streamline of the air inlet of the volute, which is a numerical simulation of the optimized integrated stove head and volute of the present invention.

[0053] Figure 10 This is a numerical simulation streamline diagram of the four-vortex suction head of the present invention;

[0054] Figure 11 This is a numerical simulation diagram of the four-vortex flow lines above the pot of this invention;

[0055] In the diagram: 1. Integrated stove body; 11. Stove; 2. Integrated stove head; 21. Head air inlet; 22. Head first guide plate; 23. Head second guide plate; 3. Head baffle; 4. Volute; 5. Impeller; 6. Upper air duct; 7. Lower air duct. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0057] This invention is implemented as follows: Figure 1-4 As shown, an integrated stove with suction and vortex control capability includes: integrated stove body 1, integrated stove head 2, head baffle 3, volute 4, impeller 5, upper air duct 6, and lower air duct 7.

[0058] The device body 1 includes a stove 11;

[0059] The integrated stove head 2 includes a head air inlet 21, a head first guide plate 22, and a head second guide plate 23;

[0060] The control method of the integrated stove of the present invention is as follows: the profile of the second guide plate 23 and the volute 4 at the head is determined by a multi-objective optimization method, which improves the oil fume flow line, reduces energy loss, thereby enhancing the suction and smoke collection effect of the air inlet, resulting in a faster flow rate and improved oil fume extraction effect.

[0061] The head second guide plate 23 device is parametrically fitted using B-spline curves. Points P1, P3, P5, P6, P7, and P8 are fixed points of the integrated stove head, P2 and P4 are control points of the head second guide plate 23, point P1 is the starting point of the head second guide plate 23, point P3 is the fixed point at the rear top of the head second guide plate 23, and P6 and P7 are the fixed points at the bottom of the head second guide plate 23. With P6 as the origin of the coordinate system, P6P7 as the X-axis, P6P3 as the Y-axis, and points P7 and P8 as fixed points of the integrated stove head, the distance between points P7 and P8 is H1, and the distance between points P6 and P7 is H2, where H2 = 1 / 8H1.

[0062] like Figure 5 As shown, point P1 is the fixed point of the head 2 of the integrated stove. A ray P1P2 is generated from P1 and is tangent to the second guide plate 23 of the head. A ray P3P2 is generated from P3 and is tangent to the second guide plate 23 of the head. The two rays intersect at P2.

[0063] A tangent ray P3P4 originates from P3 and intersects the second deflector plate 23 at P4; another tangent ray P5P4 originates from P5 and intersects the second deflector plate 23 at P4; the perpendicular distance in the Y direction between points P5 and P6 is H3, and the perpendicular distance in the Y direction between points P3 and P5 is H4; H3 = 5 / 4H1, H4 = 4 / 5H1;

[0064] like Figure 6 As shown, let points a, b, c, d, and g enclose region M; control points P2 and P4 move within region M, point d lies on line segment ce, and the length of line segment cd is equal to half the length of line segment ce.

[0065] Given the control points P2 and P4, a non-uniform quadratic B-spline node vector is generated using the Hartley-Judd algorithm. To meet the computational requirements, k = 3 is required. The Hartley-Judd algorithm ensures the continuity of the non-uniform B-spline curve. Furthermore, by considering the sum of the sides of the polygon formed by the control points, the node lengths within the domain are normalized to obtain the node vector. Specifically, the node interval lengths within the domain are calculated using the following formula:

[0066]

[0067] In the formula: l j To control the side length of the polygon, lj =|P i -P i-1 |, where P i With P i-1 Let l be the coordinates of the control point. j Control point P i With control point P i-1 The spacing, j = 1, 2, ..., n; thus, the node values ​​are obtained as follows: In the formula t k =0,t n+1 =1, i = k+1, k+2, ..., n+1, where n is the total number of control vertices minus 1;

[0068] Based on the calculated node vectors, the basis function F is calculated using the de Boor-Cox recursive formula. i,k (t), divide the interval into m parts, thus obtaining (m+1) distinct values ​​of t, where m and k satisfy the following equation to meet the control relationship:

[0069] m+1=n+k+2 (2)

[0070] Then, the points on the second guide vane profile in rectangular coordinates are obtained from the basis functions and control points; where the deBoor-Cox recursive formula is:

[0071]

[0072]

[0073]

[0074] In the formula F i,k In the double subscripts of (t), i = 0, 1, ..., n;

[0075] The linear function of the second guide vane 23 at the head is determined as follows:

[0076]

[0077] In the formula: P i (i = 0, 1, ..., n) represents n+1 control points, and the polyline connecting these control points in sequence forms a B-spline control polygon; F i,k (t) is a (k-1)th degree B-spline basis function;

[0078] The design variables are established as a function of the head air inlet flow rate Q and the head air inlet wind speed V based on the approximate model. The accuracy of the established approximate model is evaluated based on the coefficient of determination, and the final approximate model is determined. The approximate model is optimized using an optimization algorithm. Based on the optimal solution obtained by optimization, the relevant parameters of the volute 4 are determined. The final geometric modeling is performed using 3D software, and then numerical simulation is carried out.

[0079] like Figure 7 The diagram shows the parametric design of the volute. The profiles involved include the profiles at the volute tongue and the volute exit. A ray is drawn with the impeller center as the origin, intersecting the volute tongue profile at point M1, the 120° ray at point M3, and the 320° ray at point M4. A ray L2 is drawn tangent to the volute tongue from M1, and a ray L3 is drawn tangent to the volute profile from M3. Rays L2 and L3 intersect at point M2. M6 is the left endpoint of the volute exit. A ray L5 is drawn tangent to the volute profile from M4 and M6. The intersection of L5 and L6 is set as control point M5. B-spline curves are constructed with M1, M2, and M3 as control points, and similarly with M4, M5, and M6 as control points. These two spline curves can be used to characterize the profile changes at these two locations.

[0080] By parametrically describing the volute profile, the parameters selected for this invention are determined to be: volute tongue placement angle θ1, center distance L1, volute tongue radius R, and volute outlet tilt angle γ. These parameters control the changes in the profile. Considering the smooth connection of the constructed profile and taking into account the compact nature of the integrated stove fan housing, to ensure that the profile design does not exceed the housing's dimensions, the value ranges of the designed parameters are determined as follows:

[0081]

[0082] This paper selects the fan outlet flow rate Q and the fan far-field noise sound pressure level (SPL) value as optimization objectives, and establishes a multi-objective optimization function as shown in Equation 5. This invention mainly focuses on optimizing the four parameters involved for high flow rates and low far-field noise SPL:

[0083]

[0084] Based on an approximate model, a functional relationship was established between the design variables, the outlet flow rate Q, and the sound pressure level (SPL) of the far-field noise of the wind turbine. Multi-objective optimization design was carried out on the profile of the volute tongue and the outlet. Spatial samples were constructed by combining the optimized Latin hypercube test method, and a Kriging model was constructed at the same time to map the relationship between the design objectives and the optimization variables. The Kriging model was solved using the NSGA-II genetic algorithm. Based on the optimal solution obtained by optimization, the relevant parameters of the volute 4 were determined. The final geometric model was carried out using 3D software, and numerical simulation was performed.

[0085] When both the integrated cooktop head 2 and the volute 4 are optimized to their best performance, the four-vortex effect of the integrated cooktop head 2 is optimal, and its smoke collection effect is also the best. Numerical simulations of the airflow Q and wind speed V at the head air inlet are performed using the optimized profile. When both airflow Q and wind speed V reach their maximum values, the guide plate is considered optimal. When the integrated cooktop's airflow Q and air inlet wind speed V reach their maximum values, and the sound pressure level SPL reaches its minimum value, both the volute and the head are considered to be optimized to their best performance.

[0086] Figure 8 The diagram shows an eccentric vortex at the air inlet of an unoptimized integrated cooktop head and volute. The streamline diagram of the air inlet of an unoptimized standard integrated cooktop volute shows an eccentric vortex forming slightly to the lower left of the volute center. This eccentric vortex affects the airflow velocity distribution, directly influencing the fan's kinetic pressure. The eccentric vortex easily causes uneven velocity distribution, resulting in varying blade inlet velocities and reduced work capacity. Consequently, it prevents the generation of a vortex at the inlet of the integrated cooktop head. Figure 10 The four vortex-like structures, resembling tornadoes, reduce the smoke-gathering effect on the head.

[0087] Figure 9 This invention provides a numerical simulation diagram of the streamlined center vortex at the air inlet of the integrated stove's head and volute. The optimized streamline diagram shows that the center of the vortex formed at the air inlet coincides almost exactly with the center of the volute, reducing airflow loss within the volute and thus generating a vortex at the head of the integrated stove. Figure 10 The four vortexes, resembling tornadoes, generate a powerful suction force at the center of the vortexes, trapping the oil fumes and preventing them from escaping.

[0088] Figure 10 This is a numerical simulation streamline diagram of the four-vortex suction head of the present invention. Based on the joint optimization of the air inlet and the volute, and relying on the principle of aerodynamics, four vortices similar to "tornadoes" are generated during the process of the oil fumes being sucked in from the outlet of the pot to the inlet of the head. Because of the generation of vortices, a strong suction force is generated above the pot, which gathers the oil fumes and makes them difficult to escape. The high-speed airflow captures pollutant particles such as PM2.5, and the negative pressure effect cleans up the oil fumes.

[0089] Figure 11 This is a numerical simulation diagram of the four-vortex streamline above the pot in this invention; due to the joint optimization of the integrated stove head and volute, a flow pattern is generated above the pot and at the head air inlet. Figure 10 A tornado-like vortex, from Figure 11 The streamline diagram of the plane above the pot shows that two opposing vortices appear above the plane of each pot.

[0090] The integrated stove head 2 of the present invention is also equipped with a PM2.5 detection device, which can display the PM2.5 value in real time.

[0091] The integrated stove is also equipped with a touch screen and a control unit, which is connected to a mobile phone cloud for remote control.

[0092] It should be noted that the optimized design and control method for the volute and head guide plate of this invention is not limited to integrated stoves, but is also applicable to range hoods.

[0093] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A control method for an integrated stove with vortex control capability, characterized in that, The integrated stove includes an integrated stove body (1), an integrated stove head (2), a volute (4), an upper air duct (6), and a lower air duct (7). The volute (4) is located inside the integrated stove body (1) and connects the upper air duct (6) and the lower air duct (7). An impeller (5) is installed inside the volute (4). The integrated stove head (2) includes a head air inlet (21), a head first guide plate (22), and a head second guide plate (23). The profiles of the head second guide plate (23) and the volute (4) are determined using a multi-objective optimization method to improve the flow of oil fumes and enhance the suction and smoke collection effect of the air inlet. The body is as follows: the profiles of the second guide plate (23) and the volute (4) of the head are parametrically fitted using B-spline curves; when the integrated stove head (2) and the volute (4) are simultaneously optimized to the best effect, the four-vortex effect of the integrated stove head (2) is the best, and the smoke collection effect is also the best; the air volume Q and wind speed V of the head air inlet are numerically simulated through the optimized profiles, and the guide plate is considered to be the best when both air volume Q and wind speed V reach the maximum value; when the air volume Q and wind speed V of the integrated stove reach the maximum value and the sound pressure level SPL reaches the minimum value, that is, the volute and the head are simultaneously optimized to the best. The head second guide plate (23) device is parametrically fitted using B-spline curves. Points P1, P3, P5, P6, P7, and P8 are fixed points of the integrated stove head (2), P2 and P4 are control points of the head second guide plate (23), point P1 is the starting point of the head second guide plate (23), point P3 is the fixed point at the rear top of the head second guide plate (23), and P6 and P7 are the fixed points at the bottom of the head second guide plate (23). With P6 as the origin of the coordinate system, P6P7 as the X-axis, P6P3 as the Y-axis, and points P7 and P8 as fixed points of the integrated stove head (2), the distance between points P7 and P8 is H1, the distance between points P6 and P7 is H2, and H2 = 1 / 8H1; Point P1 is the fixed point of the head (2) of the integrated stove. A ray P1P2 is generated from P1 and is tangent to the second guide plate (23) of the head. A ray P3P2 is generated from P3 and is tangent to the second guide plate (23) of the head. The two rays intersect at P2. A tangent ray P3P4 originates from P3 and is perpendicular to the second deflector plate (23) of the head. A tangent ray P5P4 originates from P5 and is perpendicular to the second deflector plate (23) of the head. The two rays intersect at P4. The perpendicular distance in the Y direction between points P5 and P6 is H3, and the perpendicular distance in the Y direction between points P3 and P5 is H4. H3 = 5 / 4H1, H4 = 4 / 5H1. Let points a, b, c, d, and g enclose a region M; control points P2 and P4 move within region M, point d lies on line segment ce, and the length of line segment cd is equal to half the length of line segment ce; Given the control points P2 and P4, a non-uniform quadratic B-spline node vector is generated using the Hartley-Judd algorithm. To meet the computational requirements, k=3 is required. The Hartley-Judd algorithm ensures the continuity of the non-uniform B-spline curve. Furthermore, by considering the sum of the sides of the polygon formed by the control points, the node lengths within the domain are normalized to obtain the node vector. Specifically, the node interval lengths within the domain are calculated using the following formula: In the formula: To control the side length of the polygon, ,in and The coordinates of the control points, Control points With control points The spacing, Therefore, the node value is obtained as follows: In the formula , , n is the total number of control vertices minus 1; Based on the calculated node vectors, the basis functions are calculated using the de Boor-Cox recurrence relation. Divide the interval into m parts, thus obtaining (m+1) distinct values ​​of t, where m and k satisfy the following equation to meet the control relationship: ； Then, the points on the second guide vane profile in rectangular coordinates are obtained from the basis functions and control points; where the deBoor-Cox recursive formula is: ； ； ； In the formula In the double subscript, ; The profile function of the second guide vane (23) at the head is determined as follows: In the formula: (i=0, 1, ..., n) represents n+1 control points, and the polyline connecting the control points in sequence is a B-spline control polygon; The basis functions are (k-1)th degree B-spline functions; Design variables and head air inlet flow rate were established based on an approximate model. Q Airflow speed at the head air inlet V The functional relationship is determined, and the accuracy of the established approximate model is evaluated based on the coefficient of determination. The final approximate model is determined, and the approximate model is optimized using an optimization algorithm. Based on the optimal solution obtained by optimization, the relevant parameters of the volute (4) are determined. The final geometric modeling is performed using three-dimensional software, and then numerical simulation is carried out. Let there be a set of nodes represented as follows: And its determined B-spline basis functions The vertex is Composed of characteristic polygons, and P i Linear combination, to obtain k Second-rate( k +1) order B-spline curve, the B-spline curve is calculated using the following formula. （1） In the formula p ( u ) is a parameter t of k Piecewise polynomial; The algorithm for finding the basis functions of B-spline curves is based on the most widely used de Boor-Cox recursive formula, and its expression is shown below: （2） （3） In calculations, 0 / 0 = 0 is defined. That is, when a special case occurs where the denominator is 0, special handling is required, and the result of the calculation is treated as 0. Parametric design of the volute is performed, including the profile at the volute tongue and the profile at the volute exit. A ray is drawn with the impeller center as the origin, intersecting the volute tongue profile at point M1, the 120° ray at point M3, and the 320° ray at point M4. A ray L2 tangent to the volute tongue is drawn from M1, and a ray L3 tangent to the volute profile is drawn from M3. Rays L2 and L3 intersect at point M2. M6 is the left endpoint of the volute exit. A ray L5 tangent to the volute profile is drawn from M4 and M6. The intersection of L4 and L6 is set as control point M5. B-spline curves are constructed with M1, M2, and M3 as control points, and B-spline curves are constructed with M4, M5, and M6 as control points. The changes in the profile at the volute tongue and the volute exit are represented by two spline curves. By parametrically describing the volute profile, the selected parameter is determined to be: volute tongue placement angle. θ 1. Distance between centers L 1 and the radius of the cochlear tongue R and the volute outlet tilt angle γ By controlling the changes in parameters, the changes in the characterizable profile can be observed; the range of values ​​for the designed parameters is shown below: （4） Select the fan outlet flow rate Q Far-field noise sound pressure level of the wind turbine SPL Using the value as the optimization objective, a multi-objective optimization function is established as shown in Equation 5; the four parameters involved are optimized for high flow rate and low far-field noise sound pressure level (SPL): （5） Design variables and outlet flow rate are established based on an approximate model. Q Far-field noise sound pressure level of the wind turbine SPL The function relationship of the values ​​is used to optimize the profile of the volute tongue and the outlet. The spatial sample is constructed by combining the optimization Latin hypercube test method, and the Kriging model is constructed at the same time to map the relationship between the design objective and the optimization variables. The Kriging model is solved by the NSGA-II genetic algorithm. Based on the optimal solution obtained by optimization, the relevant parameters of the volute (4) are determined. The final geometric model is carried out by three-dimensional software, and numerical simulation is performed.

2. The control method for an integrated stove with vortex control capability according to claim 1, characterized in that, Head baffles (3) are provided on both sides of the integrated stove head (2). The integrated stove head (2) is also equipped with a PM2.5 detection device, which displays the PM2.5 value in real time.

3. The control method for an integrated stove with vortex control capability according to claim 1, characterized in that, The integrated cooktop is also equipped with a touch screen and a control unit, which is connected to a mobile phone cloud for remote control.

4. The application of the control method for the integrated stove with suction and vortex control capability as described in claim 1 in a range hood.

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