A fume purification device

Abstract

The present invention relates to an oil fume purification device, comprising a shell, a motor and a rotating shaft installed in the shell, and a wind wheel fixed on the rotating shaft. The device also comprises a high-voltage electrostatic component arranged at a smoke inlet, wherein the high-voltage electrostatic component comprises a fixed positive electrode plate and two negative electrode plates located on both sides of the positive electrode plate and rotating with the rotating shaft. An oil collecting tank is arranged around the outer side of the high-voltage electrostatic component. The oil fume separation of the present invention is relatively thorough, the purification effect is good, and the structure is compact.

Description

Technical Field

[0001] The invention belongs to the field of environmental protection, and specifically relates to an oil fume purification device. Background Art

[0002] The oil fume purification device, namely the range hood, is a necessary kitchen appliance for purifying the family kitchen environment. It is installed above the kitchen stove, and can quickly extract the waste burned by the stove and the oil fume generated during the cooking process that is harmful to the human body, and discharge it outdoors, reducing pollution, purifying the air, and having the safety protection function of anti-toxic and explosion-proof. It mainly includes a casing, an air duct, a fan, a check valve, an oil collecting and exhausting device, a lighting device, a power switch and a power cord. Its common working mode is to drive the motor to make the wind wheel rotate at a high speed, so that a negative pressure area is formed within a certain space above the stove, and the indoor oil fume gas is sucked into the range hood. The oil fume gas is filtered through the oil net, and the first oil fume separation is carried out, and then it enters the air duct of the range hood. The second oil fume separation is carried out on the oil fume gas through the rotation of the impeller. The oil fume in the wind cabinet is subjected to the action of centrifugal force, and the oil mist condenses into oil droplets, which are collected into the oil cup through the oil path. The purified smoke is finally discharged along a fixed passage. As environmental protection requirements become increasingly stringent, oil fume purification devices generally need to have a good purification effect, and completely separate oil and smoke to prevent environmental pollution. Currently, commonly used oil fume purification devices mainly use the wind power of the impeller for adsorption, which has a poor oil fume purification effect, and the oil adsorption is not concentrated enough, which makes it easy for oil droplets inside the purification device to be difficult to separate, affecting the service life and efficiency of the product after long-term use.

[0003] Household range hoods have high requirements for installation space and the space of the device itself, and need to achieve the maximum effect in a smaller space to reduce product size and improve competitive advantage. Chinese patent application number CN201510291810.1 discloses a range hood with an electrostatic oil fume purification device, comprising a centrifugal fan (3), an electrostatic oil fume purification device (5) located above the centrifugal fan (3), and an air outlet hood (4) located between the centrifugal fan (3) and the electrostatic oil fume purification device (5), wherein the electrostatic oil fume purification device (5) comprises an ionization module (52) and a dust collection module (53), wherein the dust collection module (53) comprises a plurality of dust collection plates arranged at intervals, and two adjacent dust collection plates have opposite polarities, wherein the air outlet of the centrifugal fan (3) is located below one end of the dust collection plate, and the lower edge of the dust collection plate gradually tilts upward from one end located above the air outlet of the centrifugal fan (3) to the other end away from the air outlet of the centrifugal fan (3) to form a cut angle (58). By forming a bevel at the lower edge of the dust collecting plate of the electrostatic fume purification device, the oil droplets can flow out by themselves after accumulating to a certain extent, avoiding contamination of the impeller of the centrifugal fan. At the same time, the ventilation area can be increased at a position far away from the air outlet of the centrifugal fan, so that the air volume and air pressure can be further improved. The above structure is equipped with a special electrostatic fume purification device, which increases the space. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an oil fume purification device, which has relatively thorough oil fume separation, good purification effect and compact structure.

[0005] The content of the present invention includes a shell, a motor and a rotating shaft installed in the shell, and a wind wheel fixed on the rotating shaft. It also includes a high-voltage electrostatic component arranged at the smoke inlet position, and the high-voltage electrostatic component includes a fixed positive electrode plate and two negative electrodes located on both sides of the positive electrode plate and rotating with the rotating shaft. An oil collecting tank is arranged around the outside of the high-voltage electrostatic component.

[0006] The negative electrode plate is fixed on the rotating shaft and / or the wind wheel.

[0007] The negative electrode plate is a disc structure, comprising a negative electrode mounting plate, a negative electrode connecting ring located outside the negative electrode mounting plate, and a negative electrode rib fixed between the negative electrode mounting plate and the negative electrode connecting ring, wherein the negative electrode rib is arc-shaped.

[0008] An oil collecting cover is arranged on the shell, the high voltage electrostatic assembly is located in the oil collecting cover, and an oil collecting tank is arranged in the oil collecting cover.

[0009] The edge of the oil collecting tank is provided with an anti-overflow ring plate to prevent oil from overflowing.

[0010] The positive electrode plate is fixed to the shell through an insulator.

[0011] The insulator comprises an insulating body and a clamping groove arranged on the insulating body for clamping the positive electrode plate.

[0012] A cone block is arranged at the end of the insulating body.

[0013] The positive plate is a disc structure, including a positive mounting plate, a positive connecting ring located outside the positive mounting plate, and a positive rib fixed between the positive mounting plate and the positive connecting ring, wherein the edge of the positive rib is serrated.

[0014] The wind wheel comprises a sleeve sleeved on a rotating shaft, a cylindrical tube located outside the sleeve, and a fixed connection piece connecting the sleeve and the cylindrical tube. A plurality of blades parallel to the axis of the rotating shaft are arranged in the cylindrical tube.

[0015] The shaft is provided with a sleeve, the inner wall of the sleeve connected to the shaft is coated with insulating material, the outer wall of the sleeve is made of conductive material, and the outer surface of the sleeve is provided with a carbon brush connected to the housing for electrostatic grounding.

[0016] The beneficial effect of the present invention is that the present invention is provided with two negative plates, the two negative plates are located on both sides of the positive electrode, and a high-voltage electrostatic field is formed between the positive and negative electrodes. Under the action of the wind wheel, the gas with oil smoke first enters the high-voltage electrostatic field, and the oil and other liquids in the gas are charged and attracted by the negative electrode. The negative electrode rotates at a high speed under the drive of the rotating shaft, and the oil droplets adhered to the negative electrode are thrown out and enter the oil collecting tank, so that the oil and other liquids in the oil smoke gas are separated from the gas. The negative electrode of the present invention is directly fixed on the rotating shaft or the wind wheel, and rotates with the rotation of the rotating shaft. The rotation speed is fast and no additional power is required. The structure of the present invention is compact, the negative electrode facing the wind wheel is directly fixed on the wind wheel, and the negative electrode on the other side is directly fixed on the rotating shaft. Two electrostatic electric fields are formed between the positive electrode and the two negative electrodes, and the distance between the negative electrodes can be about 3 cm. The overall structural size is basically not increased, and the effect of high-voltage electrostatic and centrifugal separation is achieved in a small space, and the oil smoke purification efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the assembly structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the wind wheel.

[0019] Figure 3 Schematic diagram of the structure of the positive plate.

[0020] Figure 4 Schematic diagram of the structure of the insulator.

[0021] Figure 5 Schematic diagram of the structure of the negative plate.

[0022] Figure 6It is a schematic diagram of the structure of the oil collecting hood.

[0023] In the figure, 1 is a motor, 11 is a rotating shaft, 2 is a shell, 21 is a smoke outlet, 22 is a smoke inlet, 3 is a wind wheel, 31 is a sleeve, 32 is a blade, 33 is a fixed connector, 4 is a negative plate I, 41 is a negative mounting plate, 42 is a negative connecting ring, 43 is a negative rib, 431 is a protruding point, 5 is a positive plate, 51 is an insulator, 511 is an insulating body, 512 is a slot, 513 is a cone block, 514 is a mounting hole, 52 is a positive rib, 521 is a sawtooth, 53 is a positive mounting plate, 54 is a positive connecting ring, 6 is a negative plate II, 7 is an oil collecting cover, 71 is an oil collecting tank, and 72 is an anti-overflow ring plate. DETAILED DESCRIPTION

[0024] like Figure 1-6 As shown, the present invention includes a shell 2, a motor 1 and a rotating shaft 11 installed in the shell 2, and a wind wheel 3 fixed on the rotating shaft 11, and also includes a high-voltage electrostatic component arranged at the smoke inlet 22, the high-voltage electrostatic component includes a fixed positive electrode plate 5 and two negative electrode plates located on both sides of the positive electrode plate 5 and rotating with the rotating shaft 11, and an oil collecting tank 71 is arranged around the outer side of the high-voltage electrostatic component.

[0025] The negative electrode plate of the present invention includes a negative electrode plate I4 and a negative electrode plate II6 located on both sides of the positive electrode plate 5, the negative electrode plate I4 is directly fixed on the wind wheel 3, and the negative electrode plate II6 is fixed on the rotating shaft 11. Compared with the conventional rotating shaft only used to connect the wind wheel, the rotating shaft 11 of the present invention is longer, which passes through the wind wheel 3, the negative electrode plate I4 and the positive electrode plate 5, and is fixedly connected to the negative electrode plate II6, so the structure is more compact, and the separation between the two negative electrode plates and the positive electrode plate 5 is realized.

[0026] Due to space limitations, the high-voltage electrostatic component of the present invention is one, including two negative plates and one positive plate. When space is not limited, it can also include multiple positive plates and multiple negative plates arranged at intervals to form multiple high-voltage electrostatic electric fields.

[0027] The rotating shaft 11 of the present invention is connected to the wind wheel 3 and the negative electrode by means of a key pin or a latch pin.

[0028] The high-voltage generator of the present invention emits high-voltage static electricity, which is connected to the fixed positive plate 5, and the voltage is between 10,000 and 15,000 volts, which is lower than the conventional high-voltage static electricity. The positive plate 5 is fixed to the housing 2 through an insulator 51, which is equivalent to the positive plate 5 and the negative plate being insulated. The negative plate is directly fixed to the rotating shaft 11 and / or the wind wheel 3, and rotates with the rotation of the rotating shaft 11. The droplets in the oil smoke are attracted and adsorbed by the negative electrode, and are thrown out under the action of centrifugal force during rotation, fall into the oil collecting tank 71, and are discharged through the oil discharge port set at the lower end of the oil collecting tank 71.

[0029] like Figure 1As shown, the oil fume inlet of the present invention is located in the cavity in the middle of the oil collecting hood 7 where the oil collecting tank 71 is located. The oil fume purification device of the present invention can be a side suction, top suction or bottom suction method for a household. After the oil fume air enters from the oil fume inlet, it directly enters the high-voltage electrostatic electric field formed by the positive and negative electrodes. Most of the oil droplets are adsorbed and discharged by the negative electrode. Clean air enters the shell 2 and is discharged from the smoke outlet 21 in the shell 2. The concentration of oil droplets is very high. The shell 2 is provided with an oil collecting hood 7, and the high-voltage electrostatic component is located in the oil collecting hood 7. The oil collecting tank 71 is provided in the oil collecting hood 7. When the oil collecting tank 71 is separately provided in the oil collecting hood 7, very few oil droplets enter the wind wheel 3 and the shell 2, and cleaning is easier. It is only necessary to remove the oil discharge port or remove the oil collecting hood 7 for cleaning.

[0030] The negative pole, wind wheel 3 and rotating shaft of the present invention are grounded to realize a high-voltage electrostatic electric field. In order to reduce the influence of static electricity on the motor 1, a shaft sleeve is arranged on the rotating shaft 11. The interior of the shaft sleeve is connected to the rotating shaft 11, and the interior is coated with insulating material. The exterior is connected to the wind wheel 3 and the negative electrode plate, and is made of conductive material. The outer surface of the shaft sleeve is provided with a carbon brush connected to the housing 2 to conduct the static electricity on the wind wheel 3 and the negative electrode plate to realize grounding.

[0031] The negative electrode plate is a disc structure, including a negative electrode mounting plate 41, a negative electrode connecting ring 42 located outside the negative electrode mounting plate 41, and a negative electrode rib 43 fixed between the negative electrode mounting plate 41 and the negative electrode connecting ring 42, wherein the negative electrode rib 43 is arc-shaped.

[0032] The negative plate is used as a component to absorb and throw away oil droplets. The commonly used structure is usually to arrange radially distributed straight strips in the middle to increase the discharge density, such as Figure 5 As shown, the negative electrode rib 43 of the present invention is arc-shaped and has at least one protruding point 431. Preferably, the protruding point 431 preferably protrudes from the plane where the negative electrode plate is located. After the oil droplets are adsorbed on the negative electrode, under the action of high-speed centrifugation, most of the oil droplets are directly thrown out from the position of the protruding point 431 and enter the oil collecting tank 71. The protruding point 431 is the position where the oil droplets are most densely concentrated, which further increases the concentration of the oil droplets and is more conducive to cleaning.

[0033] The edge of the oil collecting groove 71 is provided with an anti-overflow ring plate 72 to prevent oil from overflowing. The oil collecting cover 7 is annular, including a bottom ring plate, the middle of the bottom ring plate is a smoke inlet 22, and side ring plates extending toward the center of the annular circle are fixed on both sides of the bottom ring plate. The bottom ring plate and the side ring plates on both sides constitute the oil collecting groove 71, and the anti-overflow ring plate 72 is arranged on the side ring plates and extends inside the oil collecting groove 71 to prevent oil droplets from overflowing.

[0034] The positive plate 5 is fixed to the housing 2 through an insulator 51. The insulator 51 includes an insulating body 511 and a slot 512 provided on the insulating body 511 for clamping the positive plate 5. A cone block 513 is provided at the end of the insulating body 511. The insulator 51 is preferably fixed to the housing 2 by bolts, and the bolts pass through the mounting holes 514 inside the insulator. The insulating body 511 is cylindrical, and the slot 512 is generally located at the waist of the insulating body 511, surrounding the cylinder. There are generally at least 2 insulators 51, preferably 3-4, such as Figure 5 As shown, there are four, which is equivalent to the positive plate 5 being clamped by at least two insulators. The contact area between the positive plate 5 and the insulator 51 is small. By arranging cone blocks 513 at both ends of the insulating body 511, the possibility of contact between the positive and negative electrodes is further reduced, and the possibility of high voltage electricity contacting the negative electrode through the insulator is smaller, which is safer.

[0035] Preferably, the present invention has an insulating baffle at a position near the center of the insulator 51 to prevent oil droplets thrown out from the negative electrode from contacting the insulator 51 and causing a safety accident.

[0036] The positive plate is a 5-disc structure, including a positive mounting plate, a positive connecting ring outside the positive mounting plate, and a positive rib 52 fixed between the positive mounting plate and the positive connecting ring, and the edge of the positive rib 52 is a sawtooth 521. The sawtooth 521 can increase the discharge efficiency and improve the high-voltage electrostatic purification effect.

[0037] The wind wheel 3 comprises a sleeve 31 sleeved on the rotating shaft 11, a cylindrical tube outside the sleeve 31, and a fixing connector 33 connecting the sleeve 31 and the cylindrical tube, and a plurality of blades 32 parallel to the axis of the rotating shaft 11 are arranged in the cylindrical tube. The wind wheel 3 structure of the present invention does not adopt the household method of directly fixing a plurality of blades on a base, but adopts a hollow cylindrical tube, on which arc-shaped blades are arranged, so that the wind force is sufficient and the noise is low.

Claims

1. A fume purification device, comprising a housing (2), a motor (1) and a rotating shaft (11) installed in the housing (2), and a wind wheel (3) fixed on the rotating shaft (11), wherein: It also includes a high-voltage electrostatic component arranged at the smoke inlet, the high-voltage electrostatic component including a fixed positive electrode plate (5) and two negative electrode plates located on both sides of the positive electrode plate (5) and rotating along with the rotating shaft (11), and an oil collecting groove (71) is arranged around the outer side of the high-voltage electrostatic component; The negative electrode plate is fixed on the rotating shaft (11) and / or the wind wheel (3), and the negative electrode plate includes a negative electrode plate I (4) and a negative electrode plate II (6) located on both sides of the positive electrode plate (5), the negative electrode plate I (4) is directly fixed on the wind wheel (3), and the negative electrode plate II (6) is fixed on the rotating shaft (11), and the distance between the negative electrode plate I (4) and the negative electrode plate II (6) is 3 cm; The negative electrode plate is a disc structure, comprising a negative electrode mounting plate (41), a negative electrode connecting ring (42) located outside the negative electrode mounting plate (41), and a negative electrode rib (43) fixed between the negative electrode mounting plate (41) and the negative electrode connecting ring (42); the negative electrode rib (43) is arc-shaped, and has at least one protruding point (431) on the negative electrode rib (43); The positive electrode plate (5) is provided with a positive electrode rib (52), and both sides of the edge of the positive electrode rib (52) are saw teeth (521); The positive electrode plate (5) is fixed on the housing (2) via an insulator (51); The insulator (51) comprises an insulating body (511) and a clamping groove (512) arranged on the insulating body (511) and used for clamping the positive electrode plate (5); A cone block (513) is provided at the end of the insulating body (511).

2. The oil fume purification device according to claim 1, characterized in that: An oil collecting hood (7) is provided on the housing (2), the high-voltage electrostatic assembly is located in the oil collecting hood (7), and an oil collecting tank (71) is provided in the oil collecting hood (7).

3. The oil fume purification device according to claim 2, characterized in that: An anti-overflow ring plate (72) is provided at the edge of the oil collecting groove (71) to prevent oil from overflowing.

4. The oil fume purification device according to claim 1, characterized in that: The rotating shaft (11) is provided with a shaft sleeve, the inner wall of the shaft sleeve connected to the rotating shaft (11) is coated with insulating material, the outer wall of the shaft sleeve is made of conductive material, and the outer surface of the shaft sleeve is provided with a carbon brush connected to the housing (2) for electrostatic grounding.

5. The oil fume purification device according to claim 1, characterized in that: The wind wheel (3) comprises a sleeve (31) sleeved on a rotating shaft (11), a cylindrical tube located outside the sleeve (31), and a fixed connection piece connecting the sleeve (31) and the cylindrical tube, wherein a plurality of blades (32) parallel to the axis of the rotating shaft (11) are arranged in the cylindrical tube.

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