A novel under-type integrated stove box body, design method and application

Abstract

The present application belongs to the integrated stove technical field, disclose a kind of novel under-set integrated stove box, including box body and fan section;The upper end of the box body is provided with box inlet, the lower side right end of the box body is provided with box outlet, and the fan section is fixedly connected with the outer end of box outlet;The right side of the lower end of the box inlet is connected with box inlet inclined section, and the left side of the lower end of the box body is provided with the box outlet inclined section connected with box outlet.The present application is designed based on the principle of micro air dynamics, with the help of CFD simulation technology, the principle of fluid negative pressure area is used to let the oil fume be discharged downward with negative pressure, so as to bring higher oil fume suction rate;According to the fluid dynamics theory, the present application reduces the cross-section change rate, which can effectively reduce the system resistance and noise;In the present application, the variable cross-section design can save the invalid space and reserve more space for other components of integrated stove.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of integrated stove, and particularly relates to a novel under-mounted integrated stove box body, a design method and application. BACKGROUND

[0002] According to the characteristics of the most popular integrated stove products on the current Chinese market, the fan inlet and outlet pipes are directly connected to the whole machine inlet and outlet air ducts, causing flow loss inside the integrated stove and generating a separation vortex, which is one of the noise sources of the integrated stove. The key factors affecting the performance and noise of the integrated stove are the integrated stove inlet channel, outlet channel and ventilator design. Moreover, the existing integrated stove has low smoke collection efficiency and low space utilization.

[0003] Through the above analysis, the problems and defects of the prior art are:

[0004] The existing integrated stove has large noise, low smoke collection efficiency and low space utilization. SUMMARY

[0005] In view of the problems existing in the prior art, the present application provides a novel under-mounted integrated stove box body, a design method and application. In view of the above problems, in order to improve the performance and noise of the integrated stove air duct system, the CFD simulation technology is needed to "virtually" do experiments on the computer to simulate the actual fluid flow situation. And its basic principle is to numerically solve the differential equation of the control fluid flow to obtain the discrete distribution of the flow field of the fluid flow on the continuous region, thereby approximating the fluid flow situation. Through experimental testing, the accuracy of numerical simulation is verified, and the actual performance of the integrated stove air duct system is tested. The present application is based on computational fluid dynamics (CFD) and acoustic analogy model, and proposes a novel under-mounted integrated stove box body, which has important significance for the improvement of modern kitchen working environment and the guidance of engineering design.

[0006] The present application is implemented as follows: a novel under-mounted integrated stove box body comprises:

[0007] a box body and a fan section;

[0008] an inlet of the box body is formed at the upper end of the box body, an outlet of the box body is formed at the lower right end of the box body, and the fan section is fixedly connected to the outer end of the outlet of the box body;

[0009] an inclined section of the inlet of the box body is connected to the right lower end of the inlet of the box body, and an inclined section of the outlet of the box body is arranged at the left lower end of the box body and connected to the outlet of the box body.

[0010] Further, the length of the inlet of the box body is a, and the width of the inlet of the box body is b, wherein 9 < a / b < 10;

[0011] Further, the height of the inlet of the box body is H, wherein 2 < a / H < 2.5;

[0012] Further, the height of the box outlet inclined section is d, the width of the box outlet inclined section is c, the width of the box outlet is e, and the curvature of the box outlet inclined section is Wherein 1

[0013] Further, the height of the box inlet inclined section is h, and the slope of the box inlet inclined section is alpha, wherein tan alpha = h / (a-c-e), and alpha = 20-23°.

[0014] Another object of the present application is to provide a design method of a new type of under-mounted integrated cooker box, which comprises the following steps:

[0015] Step one, three-dimensional modeling of the initial air duct of the integrated cooker;

[0016] Step two, dividing each fluid region and extending the outlet to make the outlet flow fully developed, using the pre-processing software icem of Fluent to divide the grid of the three-dimensional model, using structured grid for the impeller, and using unstructured grid for the complex part of the geometric model;

[0017] Step three, using Fluent software to calculate the flow field, the air flow speed inside the fan is slow, and the change of air density can be ignored, assuming that the flow is incompressible flow. The k-epsilon model is used for the turbulent flow model, the near-wall flow field is processed by using the non-equilibrium wall function, the SIMPLEC algorithm is selected for the pressure and velocity coupling mode, and the second-order upwind is used for the equation discrete format. The impeller speed is given, and the inlet and outlet are both pressure boundary conditions;

[0018] Step four, intercepting each cross section of the box to analyze the flow field, and optimizing the structure of the low-energy micro-cluster region to reduce vortex noise.

[0019] Another object of the present application is to provide an integrated cooker provided with the new type of under-mounted integrated cooker box.

[0020] Another object of the present application is to provide an application of the integrated cooker in the field of smoking and smoke exhaust in family and public catering.

[0021] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present application are analyzed from the following aspects:

[0022] First, in view of the technical problems existing in the prior art and the difficulty in solving the problems, the technical solutions to be protected by the present application are closely combined with the results and data in the research and development process, and the technical problems solved by the technical solutions are analyzed in detail and profoundly, and some creative technical effects brought by the solutions are described as follows:

[0023] 1) The present application is based on the principle of micro air dynamics, the air duct system is simplified modeling, the air volume, oil fume flow field, velocity flow field and negative pressure area are modified and analyzed, and is designed by means of CFD simulation technology, the lower exhaust utilizes the principle of fluid negative pressure area, the oil fume is discharged downward along with the negative pressure, the flow state of the airflow is improved, the airflow loss is reduced, so that higher oil fume suction rate is brought. The purpose of increasing air volume and reducing noise is achieved;

[0024] 2) According to the fluid dynamics theory, the present application can effectively reduce the system resistance and noise by reducing the cross section change rate;

[0025] 3) The variable cross section design in the present application can save invalid space and reserve more space for other parts of the integrated cooker.

[0026] Secondly, the technical scheme is regarded as a whole or from the product point of view, the technical effects and advantages of the technical scheme to be protected by the present application are described as follows:

[0027] The present application has higher oil fume suction rate, effectively reduces the system resistance and noise, and saves the occupied space. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic view of the new lower integrated cooker box provided by the embodiment of the present application;

[0029] Figure 2 is a front view of the new lower integrated cooker box provided by the embodiment of the present application;

[0030] Figure 3 is a side view of the new lower integrated cooker box provided by the embodiment of the present application;

[0031] Figure 4 is a surface sound power level cloud chart of the new lower integrated cooker box provided by the embodiment of the present application;

[0032] In the figure: 1, box body; 2, fan section; a, box inlet length; b, box inlet width; c, box outlet inclined section width; d, box outlet inclined section height; e, box outlet width; R1, box outlet inclined section arc; H, box inlet height; h, box inlet inclined section height; alpha, box inlet inclined section slope. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present application more clear and explicit, the present application is further described in detail below in combination with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0034] I. Explanation of the embodiments. In order for those skilled in the art to fully understand how the present application is specifically implemented, this part is an explanation of the embodiments of the technical solutions of the claims.

[0035] As shown in Figures 1 to 3 The new under-type integrated cooker box provided by the embodiment of the present application comprises a box body 1 and a fan section 2.

[0036] The box body 1 and the fan section 2;

[0037] The upper end of the box body 1 is provided with a box inlet, the lower right end of the box body is provided with a box outlet, and the fan section 2 is fixedly connected with the outer end of the box outlet.

[0038] The right side of the lower end of the box inlet is connected with a box inlet inclined section, and the left side of the lower end of the box body is provided with a box outlet inclined section connected with the box outlet.

[0039] The length of the box inlet is a, and the width of the box inlet is b, wherein 9 < a / b < 10;

[0040] Further, the height of the box inlet is H, wherein 2 < a / H < 2.5;

[0041] Further, the height of the box outlet inclined section is d, the width of the box outlet inclined section is c, the width of the box outlet is e, and the radian of the box outlet inclined section is R1, wherein 1 < c / d < 1.15;

[0042] Further, the height of the box inlet inclined section is h, and the slope of the box inlet inclined section is a, wherein tan a = h / (a-c-e), and a = 20-23°;

[0043] The fan inside the fan section 2 is not limited to a diagonal flow fan;

[0044] The air flow direction inside the device: the air flow is sucked into the box body 1 through the box inlet, and flows out through the fan section 2.

[0045] The embodiment of the present application also provides a design method of a new under-type integrated cooker box, which comprises the following steps:

[0046] Step one, three-dimensional modeling of the initial air duct of the integrated cooker;

[0047] Step two, dividing each fluid region and extending the outlet to make the outlet flow fully developed, using the pre-processing software icem of Fluent to divide the grid of the three-dimensional model, using structured grid for the impeller, and using unstructured grid for the part of the geometric model which is relatively complex;

[0048] Step three, Fluent software is used to calculate the flow field, the air flow rate inside the fan is slow, the air density change can be ignored, and the flow is assumed to be incompressible. The k-ε model is used for the turbulent flow model, the near-wall flow field is processed by the non-equilibrium wall function, the SIMPLEC algorithm is selected for the pressure and velocity coupling mode, and the second-order upwind is used for the equation discrete format. The impeller speed is given, and the inlet and outlet are both pressure boundary conditions;

[0049] Step four, the flow field of each cross section of the box is analyzed, the low-energy micro-cluster area is optimized, and the vortex noise is reduced.

[0050] II. Evidence of the effects of the embodiments. The embodiments of the present application have achieved some positive effects during research and development or use, and indeed have great advantages compared with the prior art. The following content is described in combination with test process data, charts, etc.

[0051] From Figure 4 The integrated stove modified box surface sound power and cloud map can be seen that the overall sound power level is lower than 52dB, and the noise source distribution on the box surface is relatively uniform, indicating that the box structure modification is reasonable.

[0052] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0053] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any modification, equivalent replacement and improvement made by those skilled in the art within the technical range disclosed by the present application, which is within the spirit and principles of the present application, should be covered within the protection scope of the present application.

Claims

1. A new type of integrated under-type oven, characterized in that, The new lower integrated stove box body comprises: A box body and a fan section; The upper end of the box body is provided with a box inlet, and the lower right end of the box body is provided with a box outlet, and the fan section is fixedly connected with the outer end of the box outlet; The right side of the lower end of the box inlet is connected with a box inlet inclined section, and the left side of the lower end of the box body is provided with a box outlet inclined section connected with the box outlet; The design method of the new lower integrated stove box body comprises: Step one, three-dimensional modeling of the initial air duct of the integrated stove; Step two, dividing each fluid region and extending the outlet to make the outlet flow fully developed; Step three, flow field calculation; Step four, flow field analysis of each cross section of the box, and structure optimization of the low-energy micro-cluster region; In step two, the grid of the three-dimensional model is divided by the pre-processing software icem of Fluent, the impeller adopts structured grid, and unstructured grid for the complex part of the geometric model; The step three flow field calculation includes: the airflow flow in the fan is incompressible flow, the turbulence model adopts k-ε model, the near-wall flow field adopts non-equilibrium wall function processing, the pressure and velocity coupling mode selects SIMPLEC algorithm, and the equation discrete format adopts second-order upwind; the given impeller speed, the inlet and outlet are both pressure boundary conditions.

2. The new under-type integrated cooker cabinet according to claim 1, characterized in that, The length of the box inlet is a, and the width of the box inlet is b, wherein 9 3. The new under-type integrated cooker cabinet according to claim 1, characterized in that, The height of the box inlet is H, wherein 2 4. The new under-type integrated cooker cabinet of claim 1, characterized in that, The height of the box outlet inclined section is d, the width of the box outlet inclined section is c, the curvature of the box outlet inclined section is wherein 1 < c / d < 1.

15.

5. The new under-type integrated cooker cabinet according to claim 4, characterized in that, The height of the box inlet inclined section is h, the inclination of the box inlet inclined section is α, and the width of the box outlet is e, wherein tanα=h / (a-c-e), α=20-23°.

6. An integrated hob, characterized in that The integrated stove is provided with the new lower integrated stove box body as claimed in any one of claims 1-5.

7. The integrated stove according to claim 6 is applied to smoke suction and smoke exhaust in the field of family and public catering.

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