CN217383056U - High-efficient entrapment device of hot plume of oil smoke based on high-speed efflux shielding effect - Google Patents

Abstract

The utility model discloses a high-efficient entrapment device of hot plume of oil smoke based on high-speed efflux shielding effect, including installing the organism on kitchen wall, the organism below sets up the collection petticoat pipe, collection petticoat pipe rear center is equipped with the air exit, the collection petticoat pipe is located the eye of a kitchen top, be provided with the cavity of keeping apart with the air exit wind path in the organism, the cavity encircles the air exit setting, the shape of collection petticoat pipe is the variable cross section setting, install fan and wind-guiding structure in the cavity, fan and wind-guiding structure set up the position of corner about the rear in the cavity respectively, the wind-guiding structure includes air intake and air outlet, air intake and air outlet set up respectively directly over the wind-guiding structure with control two angles, the air intake department at the wind-guiding structure is installed to the fan, the collection petticoat pipe diminishes from fan air supply direction cross-section gradually, collection petticoat pipe outline plane department be equipped with the high-speed jet supply-air outlet that the air outlet of wind-guiding structure matches. The utility model discloses when effectively shielding, quick discharge oil smoke, reduce unnecessary energy consumption and noise.

Description

High-efficient entrapment device of hot plume of oil smoke based on high-speed efflux shielding effect

Technical Field

The utility model belongs to the technical field of the oil smoke control, concretely relates to high-efficient entrapment device of hot plume of oil smoke based on high-speed efflux shielding effect.

Background

In the cooking process, the smoke exhaust ventilator cannot timely and completely exhaust smoke generated in the cooking process, and the smoke escapes to the periphery to cause indoor air pollution and harm to the health of people. Most of the current ways for improving the collection efficiency of the range hood on the market are to increase the air discharge amount, but the best way for improving the collection efficiency is not to increase the air discharge amount at one step. The exhaust quantity of the smoke exhaust ventilator is gradually increased to reach the peak value of the collecting efficiency, the exhaust quantity is increased again, the collecting efficiency is reduced, the exhaust quantity is too large, the indoor negative pressure is formed, the energy consumption is increased, and the environment-friendly and energy-saving requirements of the existing kitchen oil smoke control device cannot be met. In most of the prior art, a linear slotted air opening is arranged at the front side of a fume collecting hood to form an air curtain to prevent oil fume from overflowing, but the air opening is too long, so that the edge speed distribution of the air opening is not uniform, and the stability of the air curtain is poor; or a common air duct is adopted for supplying air to the air port, the longer the air duct is, the larger the on-way resistance is, the air quantity can be greatly reduced along with the increase of the distance, the air quantity distribution of the front section and the rear section of the air port is uneven, the speed is reduced more backwards, and the designed air supply speed cannot be reached.

Disclosure of Invention

In order to overcome above technical problem, the utility model aims to provide a high-efficient entrapment device of hot plume of oil smoke based on high-speed efflux shielding effect, shielding effect through high-speed efflux keeps apart user and the oil smoke of escape, and combine the inhomogeneous problem of air-out to solve through variable cross section wind channel spaced flat seam form air outlet, make the efflux can stabilize the shielding oil smoke, and to the dynamic change of the hot plume of oil smoke, adopt intelligent automatic control scheme, the high-speed fluidic intensity of reasonable control, make high-speed fluidic intensity and current air exhaust flow field suit, effectively shield, when discharging the oil smoke fast, reduce unnecessary energy consumption and noise.

In order to realize the purpose, the utility model discloses a technical scheme is:

a high-efficient entrapment device of hot plume of oil smoke based on high-speed efflux shielding effect, includes the organism 1 of installing on kitchen wall, and organism 1 below sets up collection petticoat pipe 2, and collection petticoat pipe 2 rear center is equipped with air exit 3, and collection petticoat pipe 2 is located the eye of a kitchen top, is provided with the cavity 4 with air exit 3 wind path isolation in the organism 1, and cavity 4 encircles air exit 3 and sets up, collection petticoat pipe 2's shape is for the variable cross section setting, install fan 5 and wind-guiding structure 6 in the cavity 4, fan 5 and wind-guiding structure 6 set up the position of rear left and right corner in cavity 4 respectively, wind-guiding structure 6 includes air intake 7 and air outlet 8, and air intake 7 and air outlet 8 set up respectively directly over wind-guiding structure 6 and two angles on the left and right, fan 5 installs in the air intake 7 department of wind-guiding structure 6, and collection petticoat pipe 2 diminishes from fan 5 direction cross section gradually, and a high-speed jet air supply outlet 9 matched with the air outlet 8 is arranged on the plane of the outer contour of the smoke collecting hood 2.

The top plate 12 is installed at the upper end of the fume collecting hood 2, the top plate 12 and the fume collecting hood 2 enclose a cavity 4, and the top plate 12 is provided with a ventilation hole 13 communicated with the outside of the machine body 1.

The high-speed jet air supply outlets 9 are arranged in a plurality of numbers, the high-speed jet air supply outlets 9 are distributed at equal intervals, and the fan 5 introduces air into the air guide structure 6 and discharges the air through the high-speed jet air supply outlets 9 to form an air curtain.

The high-speed jet air supply outlet 9 is a flat-slit-shaped through hole penetrating through the smoke collecting hood 2 plate.

A monitoring intelligent control module is arranged at a right air port of the air outlet 3, the monitoring intelligent control module comprises a flue gas sensor 14, and the flue gas sensor 14 is used for monitoring the pollutant concentration at the exhaust collecting hood port in real time; the flue gas sensor 14 is connected with the fan 5 through the control module, and the control module adjusts the current magnitude and direction of the power supply module through the pollutant concentration information monitored by the flue gas sensor 14 in real time, so that the air quantity of the fan 5 is controlled.

The smoke sensor 14 is an AGNC002 smoke sensor, the control module comprises a plc controller and a relay, the plc controller is a Mitsubishi plc controller FX1S-14MR, and the relay is an ohm dragon LY2N-J DC24 BY OMI universal relay.

The utility model has the advantages that:

1. the utility model discloses simple structure, low in production cost.

2. When the range hood works, the high-speed jet flow is ejected through the air supply outlet to form an air curtain similar to the outline of the smoke collecting hood at the smoke collecting hood, so that the overflow of oil smoke is effectively shielded.

3. The variable cross-section air duct is combined with the flat-slit-shaped air outlet, so that the air outlet speed of the air port can be ensured to be uniform, uneven air distribution of the front section and the rear section of the air duct is prevented, the stability of a high-speed jet air curtain is improved, the overflow of oil smoke is reduced, and the collecting efficiency of the range hood is improved.

4. The pollutant concentration is monitored in real time through the smoke sensor, the high-speed jet flow speed is intelligently adjusted according to actual load, and unnecessary energy consumption is reduced.

Drawings

Fig. 1 is a structural view of the usage state of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a structural bottom view of the smoke collecting hood of the present invention.

Fig. 4 is a structural section view of the front end variable cross-section air duct of the present invention.

Fig. 5 is the comparison of X ═ 1.44m tangent plane velocity vector diagram with the common range hood ((a) common range hood, (B) the utility model is implemented)

Fig. 6 is the comparison of Y-3.21 m section velocity vector diagram with the common range hood ((a) common range hood, (B) the utility model is implemented)

Fig. 7 is a comparison between X ═ 1.44m section pollutant concentration distribution cloud chart of the range hood of the present invention and that of the common range hood ((a) common range hood, (B) the present invention is implemented)

Fig. 8 is a cloud picture comparison of the pollutant concentration distribution on the section of 3.21m with the general range hood (a) general range hood, and (B) the utility model is implemented)

In the figure, 1, a machine body, 2, a smoke collecting hood, 3, an exhaust outlet, 4, a cavity, 5, a fan, 6, a wind guide structure, 7, an air inlet, 8, an air outlet, 9, a high-speed jet flow air supply outlet, 10, a fixed support, 11, an induced air hole, 12, a top plate, 13, an air vent and 14, a smoke sensor are arranged.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-4: the kitchen range hood comprises a body 1 and a smoke collecting hood 2, wherein an exhaust outlet 3 is arranged on the smoke collecting hood 2, the body 1 is installed on a kitchen wall, and the smoke collecting hood 2 is located above a range hole. Be equipped with the cavity 4 of keeping apart with 3 wind paths of air exit in the organism 1, the shape of collection petticoat pipe 2 is the variable cross section setting, collection petticoat pipe 2 upper end installation roof 12, roof 12 encloses with collection petticoat pipe 2 become cavity 4 is equipped with the outside ventilation hole 13 of intercommunication organism 1 on the roof 12.

Install fan 5, wind-guiding structure 6 in the cavity 4, wind-guiding structure 6 has air intake 7 and air outlet 8, fan 5 is installed wind-guiding structure 6's air intake 7 department, collection petticoat pipe 2 diminishes from 5 air supply direction cross-sections of fan gradually, 2 outline planes departments of collection petticoat pipe be equipped with a plurality of high-speed jet air supply outlets 9 that wind-guiding structure 6's air outlet 8 matches, 9 equidistance distributions of a plurality of high-speed jet air supply outlets, fan 5 introduce wind-guiding structure 6 and form the air curtain via 9 discharges of high-speed jet air supply outlets with wind.

The utility model discloses set up the installation cavity of keeping apart with 3 air currents of air exit in the organism to install fan 5, wind-guiding structure 6 in cavity 4, make fan 5, wind-guiding structure 6's air current keep apart completely with the air current of inlet scoop, guarantee the air quality of air curtain. Enclose into cavity 4 by roof 12 and collection petticoat pipe 2, simple structure sets up ventilation hole 13 on the roof 12 to set up the wind channel of collection petticoat pipe 2 both sides into the variable cross section wind channel, the wind pressure is as even as possible when making the air curtain air-out, improves and keeps off the cigarette effect.

The utility model is provided with a monitoring intelligent control module at the right side air port of the air outlet 3, the monitoring intelligent control module comprises a flue gas sensor 14, and the flue gas sensor 14 is used for monitoring the pollutant concentration at the exhaust fume collecting hood port in real time; the control module adjusts the current magnitude and direction of the power supply module through the pollutant concentration information monitored by the smoke sensor 14 in real time, so that the air quantity of the fan 5 is controlled, the air outlet speed of the high-speed jet air curtain is automatically and intelligently controlled, and the high-efficiency energy-saving effect is achieved; the monitoring system further comprises a power module, and the power module is used for supplying power to the monitoring module and the control module. Specifically, the utility model discloses an equipment all includes but not limited to following model: the flue gas sensor 14 is an AGNC002 flue gas sensor produced by Shenzhen Hongzitai electronics Limited, and the product can directly communicate through configuration software and the like, so that secondary development is facilitated; the control module comprises a plc controller and a relay, wherein the plc controller is a Mitsubishi plc controller FX1S-14MR, and the relay is an ohm dragon LY2N-J DC24 BY OMI general relay; the power supply module is an HCP series universal direct current power supply and an AC-DC power supply module of Suzhou Pi electromechanical, the product has small volume, adopts PWM modulation, and has low power consumption, high efficiency and more power saving of a crystal module, the input voltage AC is 220V, and the output voltage and the output current are 0-rated value.

The variable cross-section setting is made to the shape of collection petticoat pipe 2, and the wind channel section changes and high-speed efflux supply-air outlet 9 area is unchangeable, can evenly send out equivalent air via the wind channel lateral wall, and the air-out speed along high-speed efflux supply-air outlet 9 length also equals. The outer contour plane of the fume collecting hood 2 is provided with a plurality of high-speed jet air supply outlets 9, and the high-speed jet air supply outlets 9 are distributed at equal intervals. The high-speed jet air supply outlet 9 is a flat seam-shaped through hole penetrating through the exhaust fume collecting hood 2 plate, so that air can be uniformly discharged from an air curtain, the jet is prevented from being attenuated too fast along the edge of the air inlet, and the on-way resistance is effectively reduced. The high-speed jet air supply outlet 9 is arranged on the upper end surface, two sides and the front end surface of the fume collecting hood 2, and takes the front and the side of the fume collecting hood into consideration, so that the fume is not easy to leak at all the angular positions of the fume collecting hood 2.

Specifically, the calculation of each section diameter of the variable-section air duct comprises the following substeps:

a, step a: calculating the diameter D of the section 1 of the front pipeline of the first high-speed jet air supply outlet ₁ ；

Step b: calculating the diameter D of the section 2 according to the total pressure of the section 2 ₂ ；

Step c: continuing to calculate the resistance of each pipe section by analogy in turn, and obtaining the diameter D of each section ₁ …D _n Finally, the sections are connected to form a conical air duct.

Preferably, the diameter D of the section 1 in step a ₁ Obtained by the following method: according to the mean flow velocity v of the orifice ₀ Calculating the static pressure velocity v by the equations 1 and 2 _j And high velocity jet supply air outlet area f ₀ Press v _j /v _d 1.73 or more _d1 The diameter D of the first air supply outlet front duct section 1 is calculated according to the formula 3 ₁ ；

Preferably, the diameter D of the section 2 in step b ₂ Obtained by the following method: the total pressure p at the cross section 2 is determined from equation 4 _q2 Thereby calculating the diameter D of the cross section 2 according to equation 5 ₂ ；

Preferably, the size of the high-speed jet air supply outlet 9 is 20 x phi 3mm, which is beneficial to the uniform air outlet speed of the high-speed jet air supply outlet and the stability of the formed air curtain.

The first embodiment is as follows:

the utility model discloses the device is installed in the top of a kitchen range, the device during operation, the oil smoke is in 3 suction organisms 1 of the air exit of collection petticoat pipe 2, 5 air currents in the work extraction cavity 4 of fan, and let in the air intake 7 of wind-guiding structure 6 with the air current, blow to high-speed efflux supply-air outlet 9 from air outlet 8 after the drainage wind-guiding of wind-guiding structure 6, the air current forms the air curtain from high-speed efflux supply-air outlet 9 downward discharge, the air curtain has shielded the oil smoke and has spread outward, make the oil smoke that the culinary art process produced by the device entrapment. The combination of the variable cross-section air duct and the flat-seam-shaped high-speed jet air supply outlet 9 ensures that the air curtain formed has even air outlet and good smoke blocking effect, and the oil smoke generated in the cooking process is not easy to diffuse into the indoor environment, thereby avoiding the harm to human bodies and the pollution to the indoor environment.

Example two:

this embodiment provides experimental verification for embodiment one to the trapping effect of contrast ordinary smoke ventilator. The experimental effect shows the utility model discloses can effectively catch the pollutant that gives off in the environment. Numerical experiments of fluid mechanics were performed in this example using CFD numerical simulations. The present embodiment employs a component transport model (specials transport). The component delivery model enables a careful analysis of the flow of gas streams between different gas components.

In this example, the test environment was a small residential kitchen, measuring 3.45m in length by 2m in width by 3m in height. A double-hole cooking bench is arranged in the center of a room, the diameter of a heat source of the cooking bench is 0.2m, and the model of the double-hole cooking bench is a common double-hole cooking range. The operation panel divide into about two parts, is the U type and arranges, and the gas-cooker is placed to the kitchen right part, the utility model discloses place in the gas-cooker top.

In this embodiment, will provide the utility model discloses compare with current ordinary smoke ventilator's entrapment effect, table 1 is seen to current ordinary smoke ventilator's boundary condition, the utility model provides a table 2 is seen to the boundary condition of device.

TABLE 1 simulation boundary conditions for existing common range hood

TABLE 2. simulation boundary conditions for the trapping device provided by the utility model

The collecting effect of the utility model is obviously different from the collecting effect of the common smoke exhaust ventilator, see the attached figures 5-8. Fig. 5 and 6 are cross-sectional velocity vector diagrams of X being 1.44m and Y being 3.21m, respectively, the abscissa and ordinate are spatial positions, and the diagrams are velocity vector distributions, which represent the magnitude and direction of the velocity of the indoor flow field. As can be seen from fig. 5 and 6(a), the air outlet has a high air speed, and the speed direction is toward the inside of the hood, so that the ascending oil smoke is pressed to be gathered against the wall, and the speed direction is toward the outside of the hood at the edge of the hood, so that a large amount of oil smoke overflows from the hood. And figure 5, 6(B) can see that high-speed efflux air curtain shielding effect is obvious, and cover mouth speed is great and the direction is downward, so the oil smoke most is shielded in album petticoat pipe 2, finally by the exhaust exit entrapment, explain the utility model discloses the entrapment effect is better.

Fig. 7 and 8 are sectional density clouds with X being 1.44m and Y being 3.21m, respectively, with the horizontal and vertical coordinates being spatial positions and the values on the isobars being density distributions. As can be seen from fig. 7 and 8(a), pollutants overflow from the hood opening of the smoke collecting hood 2, a large amount of pollutants are collected on the inner wall surface of the smoke collecting hood cavity, the mass fraction of pollutants on the two sides of the cavity is about 0.03, the pollutants are collected on the upper part of the indoor space of the kitchen, the mass fraction of pollutants above the indoor space is about 0.02, and the trapping effect is poor. And figure 5, 6(B) can see that, under the effect of the high-speed jet flow forming air curtain of the utility model, the pollutant is effectively shielded, and seldom overflows from the cover opening, and the mass fraction of the indoor pollutant is about 0.01, which is lower than the condition of the action of the common range hood. Compare in ordinary smoke ventilator, use the utility model discloses a trapping effect will be more excellent.

Claims (6)

1. The high-efficiency oil smoke plume trapping device based on the high-speed jet shielding effect is characterized by comprising a body (1) arranged on a kitchen wall body, wherein a smoke collecting hood (2) is arranged below the body (1), an exhaust outlet (3) is arranged at the center of the rear of the smoke collecting hood (2), the smoke collecting hood (2) is arranged above a kitchen range, a cavity (4) isolated from an air path of the exhaust outlet (3) is arranged in the body (1), the cavity (4) is arranged around the exhaust outlet (3), the smoke collecting hood (2) is in a variable cross section shape, a fan (5) and an air guide structure (6) are arranged in the cavity (4), the fan (5) and the air guide structure (6) are respectively arranged at the positions of a rear left corner and a rear right corner in the cavity (4), the air guide structure (6) comprises an air inlet (7) and an air outlet (8), and the air inlet (7) and the air outlet (8) are respectively arranged right corner and left corner and right corner above the air guide structure (6), fan (5) are installed in air intake (7) department of wind-guiding structure (6), and collection petticoat pipe (2) diminishes from fan (5) air supply direction cross-section gradually, collection petticoat pipe (2) outline plane department be equipped with high-speed jet air supply outlet (9) that air outlet (8) match.

2. The high-efficiency oil smoke plume trapping device based on the high-speed jet shielding effect as claimed in claim 1, wherein a top plate (12) is installed at the upper end of the smoke collecting hood (2), the top plate (12) and the smoke collecting hood (2) enclose a cavity (4), and ventilation holes (13) communicated with the outside of the machine body (1) are formed in the top plate (12).

3. The high-efficiency oil smoke plume trapping device based on the high-speed jet shielding effect as claimed in claim 1, wherein the high-speed jet air supply outlets (9) are provided in a plurality, the high-speed jet air supply outlets (9) are distributed at equal intervals, and the fan (5) introduces air into the air guide structure (6) and discharges the air through the high-speed jet air supply outlets (9) to form an air curtain.

4. The high-efficiency oil smoke plume trapping device based on the high-speed jet flow shielding effect as claimed in claim 1, wherein the high-speed jet flow air supply outlet (9) is a flat slit-shaped through hole penetrating through the plate of the smoke collecting hood (2).

5. The high-efficiency oil smoke thermal plume trapping device based on the high-speed jet shielding effect as claimed in claim 1, wherein a monitoring intelligent control module is arranged at a right side air port of the air outlet (3), the monitoring intelligent control module comprises a smoke sensor (14), and the smoke sensor (14) is used for monitoring the pollutant concentration at the smoke collection hood port in real time; the smoke sensor (14) is connected with the fan (5) through the control module, and the control module adjusts the current size and direction of the power supply module through pollutant concentration information monitored by the smoke sensor (14) in real time, so that the air quantity of the fan (5) is controlled.

6. The lampblack thermal plume high-efficiency trapping device based on the high-speed jet shielding effect as claimed in claim 5, wherein the smoke sensor (14) is an AGNC002 smoke sensor, the control module comprises a plc controller and a relay, the plc controller is a Mitsubishi plc controller FX1S-14MR, and the relay is an ohm dragon LY2N-J DC24 BY OMI general relay.

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