A range hood

Abstract

The present invention discloses a range hood, comprising a fan frame, a smoke collecting hood arranged below the fan frame, and a fan system arranged in the fan frame, wherein the fan system is a double-inlet fan and comprises a left input end and a right input end, the axis of the fan system extends in the left and right directions, the smoke collecting hood comprises a hood body and an air inlet opened at the bottom of the hood body, the air inlet has two and is arranged at intervals on the left and right; the left input end of the fan system can selectively communicate with the air inlet on the left or the two air inlets, and the right input end of the fan system can selectively communicate with the air inlet on the right or the two air inlets. Compared with the prior art, the advantage of the present invention is that the flow rate of the left and right air ducts can be increased or decreased without changing the total air intake, thereby solving the problem of smoke leakage during unilateral stir-frying.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a range hood. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Usually, range hoods include top suction type and side suction type. Top suction range hoods are more and more widely used due to their advantages such as neatness, lightness and small space occupation. Top suction range hoods usually include a fume hood and a fan frame located on the fume hood. The fan frame is equipped with a volute, an impeller and a motor driving the impeller. The center of the fume hood is provided with an air inlet directly connected to the high negative pressure area where the fan is located.

[0003] This type of range hood has a fast wind speed and strong negative pressure at the air inlet of the hood, while the negative pressure attenuation is large at a position far from the air inlet. The stove burners used for cooking are usually set on the left and right sides directly below the range hood, and the oil smoke diffuses during the rising process, which leads to poor smoke extraction effect of this type of range hood, and the oil smoke often escapes. In addition, the internal resistance along the way of this type of range hood is large, resulting in a certain amount of air volume loss, resulting in a decrease in the performance and efficiency of the fan system.

[0004] Common household stoves usually have two burners on the left and right. During cooking, users sometimes only use one burner, and sometimes use both burners at the same time. However, stir-frying, which can produce a lot of oil smoke in household cooking, is often only done on one side. If the user only uses the burner on the left to cook, or uses the left burner to cook and the right burner to steam rice, then for the range hood, the oil smoke concentration and oil smoke particles on the left side will inevitably be much larger than those on the right side. Therefore, oil smoke often escapes during stir-fry cooking. The common solution is to increase the speed of the impeller to increase the total air volume of the range hood. The increase in the total air volume will increase the air volume on the left and right sides at the same time, thereby improving the oil smoke extraction effect. Obviously, the increase in the impeller speed will lead to a significant increase in noise, affecting people's health, and the actual cooking stir-frying occurs on one side, and increasing the air volume on both sides at the same time will lead to energy waste on the other side.

[0005] In addition, the range hood is usually hung on the kitchen wall, and there is a certain gap between the range hood and the wall. Due to the wall adhesion effect, a small amount of oil fume vapor will be absorbed in the gap. During the long-term cooking process, the gap will gradually become moldy due to long-term moisture. The gap is usually difficult to clean, and moldy bacteria will pollute the kitchen environment and affect people's health. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a range hood in view of the deficiencies in the above-mentioned prior art, so as to increase or decrease the flow rates in the left and right air ducts, thereby avoiding smoke leakage during unilateral stir-frying.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: a range hood, comprising a fan frame, a smoke collecting hood arranged below the fan frame, and a fan system arranged in the fan frame, the fan system is a double-inlet fan and comprises a left input end and a right input end, the axis of the fan system extends in the left and right directions, the smoke collecting hood comprises a hood body and an air inlet opened at the bottom of the hood body, the air inlet has two and is arranged at intervals on the left and right sides; the characteristics are:

[0008] The left input end of the fan system can be selectively connected to the fluid of the air inlet on the left or the two air inlets, and the right input end of the fan system can be selectively connected to the fluid of the air inlet on the right or the two air inlets.

[0009] Therefore, without changing the total air intake volume, the flow rate of the left and right air ducts can be increased or decreased, thereby solving the problem of smoke leakage during unilateral stir-frying.

[0010] In order to facilitate the connection between each air inlet and the corresponding input end of the fan system, the range hood further comprises a connecting pipe in fluid communication with the fan frame, a header box arranged on the cover body, and a regulator assembly, wherein the connecting pipe has two and is arranged at intervals on the left and right sides, and the regulator assembly comprises a first regulator arranged between the left and right connecting pipes of the header box to connect the two fluids, and a second regulator arranged between the right and right connecting pipes of the header box to connect the two fluids;

[0011] The collecting box comprises a box body, the box body is divided into an upper cavity and a lower cavity, the lower cavity is divided into a first cavity and a second cavity which are independently connected to two air inlets respectively;

[0012] The first chamber can be directly connected to the first regulator fluid or connected to the first regulator and / or the second regulator fluid through the upper chamber, and the second chamber can be directly connected to the second regulator fluid or connected to the first regulator and / or the second regulator fluid through the upper chamber.

[0013] Preferably, the box body is a rectangular parallelepiped, the left side wall of the box body constitutes a first partition, the right side wall of the box body constitutes a second partition, the first partition is provided with a circular first through-hole, and the second partition is provided with a circular second through-hole;

[0014] The first regulator and the second regulator are both cylindrical, the end wall of the first regulator close to the first partition is adapted to the shape and size of the first through hole, the end wall of the second regulator close to the second partition is adapted to the shape and size of the second through hole, the first regulator and the second regulator can rotate relative to the box body and the connecting pipe, and the rotation axis is the axis of each regulator itself;

[0015] The first regulator is provided with a first inlet on the end wall close to the first partition, and the first inlet can be rotated to completely correspond to the lower cavity, completely correspond to the upper cavity, or partially correspond to the upper cavity and partially correspond to the lower cavity; the first regulator is provided with a first outlet on the end wall close to the left connecting pipe, so as to connect the first regulator with the left connecting pipe fluid;

[0016] The second regulator is provided with a second inlet on the end wall close to the second partition, and the second inlet can be rotated to completely correspond to the lower cavity, completely correspond to the upper cavity, or partially correspond to the upper cavity and partially correspond to the lower cavity; the second regulator is provided with a second outlet on the end wall of the connecting pipe close to the right side, thereby connecting the second regulator and the connecting pipe fluid on the right side.

[0017] Thereby, fluid communication switching between the first chamber and the two regulators and between the second chamber and the two regulators is achieved.

[0018] Preferably, the first inlet and the second inlet are both fan-shaped, so as to facilitate adjustment of the inlet area and communication with different chambers during rotation.

[0019] In order to facilitate the formation of each chamber and make the first chamber and the upper chamber selectively connected, a third partition, a fourth partition and a fifth partition are also arranged in the box body, the upper chamber and the lower chamber are separated by the third partition, the first chamber and the second chamber are separated by the fourth partition, the fifth partition extends between the first partition and the second partition and extends to the top and the bottom of the box body, and the rear end of the fourth partition abuts against the fifth partition;

[0020] A ventilation hole is provided on the third partition, and the ventilation hole extends forward from near the fifth partition, and connects the first chamber and the second chamber. The ventilation hole has a left part corresponding to the first chamber and a right part corresponding to the second chamber, and one of the left part and the right part of the ventilation hole is selectively closed.

[0021] A flap is arranged in the ventilation hole, the depth of the flap in the front-to-back direction is adapted to the ventilation hole, and the flap can rotate around an axis extending in the front-to-back direction, thereby selectively closing the left part or the right part of the ventilation hole.

[0022] Preferably, in order to make the air ducts on the left and right sides symmetrical, the rotation axis of the flap is flush with the third partition, the length of the flap in the left and right direction is equivalent to half the length of the ventilation hole, and the rotation axis of the flap is located in the middle position of the ventilation hole in the left and right direction and corresponds to the fourth partition.

[0023] In order to facilitate the independent communication between the air inlet and the first chamber and the second chamber, two second notches are provided on the top of the cover body, and the two second notches are arranged on the left and right and are connected. The smoke collecting hood also includes a smoke collecting hood partition plate arranged in the cover body and located between the two second notches, and the upper and lower ends of the smoke collecting hood partition plate extend to the second notches and the bottom of the cover body respectively, thereby isolating the passage between the air inlet and the second notch on the left side and the passage between the air inlet and the second notch on the right side from each other, so that the air inlet on the left side and the air inlet on the right side are independent of each other;

[0024] The first chamber corresponds to the second notch on the left side and is thus in fluid communication with the air inlet on the left side, and the second chamber corresponds to the second notch on the right side and is thus in fluid communication with the air inlet on the right side.

[0025] The first chamber and the second chamber are respectively provided with heating modules, thereby utilizing the thermodynamic principle to increase the flow rates of the left and right air ducts respectively, so as to improve the smoking effect.

[0026] To facilitate fluid communication between the fan rack and the connecting pipe, the fan rack includes a base plate at the bottom, and the base plate is respectively provided with first notches near the left and right sides. The connecting pipe is connected to the fluid in the fan rack through the first notches at the corresponding positions, thereby the left and right sides of the fan system and the space between the fan rack respectively constitute cold chambers.

[0027] In order to further improve the temperature gradient distribution, the range hood further comprises a heat dissipation structure, wherein the heat dissipation structure comprises a radiator arranged in the fan frame at a position above each first notch.

[0028] To further improve the temperature gradient distribution, the heat dissipation structure also includes a heat dissipation plate arranged under the bottom plate, and the left and right sides of the heat dissipation plate have overlapping parts with the radiators at corresponding positions respectively, so that the heat dissipation plate conducts heat to the radiator.

[0029] Preferably, the heat dissipation structure further comprises a heat dissipation fan for blowing the heat emitted by the heat dissipation plate to the gap between the range hood and the installation base, thereby recycling the heat in the air duct and drying the gap under the action of the heat dissipation fan, thereby achieving drying of the wall and reducing mildew.

[0030] Compared with the prior art, the advantages of the present invention are:

[0031] 1. Without changing the total air intake, the flow rate of the left and right air ducts can be increased or decreased, thereby solving the problem of smoke leakage during frying on one side;

[0032] 2. By setting up a heating module and a heat dissipation structure, a multi-gradient temperature distribution can be formed, so that the impeller speed does not need to be increased, that is, the flow of the left and right air ducts is increased respectively by using the thermodynamic principle, thereby increasing the air volume at the air inlet to improve the smoking effect.

[0033] 3. Recycle the heat in the air duct and dry the gaps under the action of the cooling fan, so as to dry the walls and reduce mildew. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of a range hood according to an embodiment of the present invention;

[0035] Figure 2 is a cross-sectional view of a range hood according to an embodiment of the present invention;

[0036] Figure 3 It is a cross-sectional view (left-right cross-section) of a header box and a regulator assembly of a range hood according to an embodiment of the present invention;

[0037] Figure 4 It is a partial cross-sectional view (front-to-back cross-section) of a collecting box and a regulator of a range hood according to an embodiment of the present invention;

[0038] Figure 5 A cross-sectional view of a working state of a collecting box and a regulator assembly of a range hood according to an embodiment of the present invention;

[0039] Figure 6 A cross-sectional view of a working state of a collecting box and a regulator assembly of a range hood according to an embodiment of the present invention;

[0040] Figure 7 It is a top view of the range hood installed in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below with reference to the accompanying drawings.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0043] See also Figure 1 to Figure 4 A range hood comprises a fan frame 1, a smoke collecting hood 2 arranged below the fan frame 1, and a connecting pipe 3 connected between the fan frame 1 and the smoke collecting hood 2, wherein the connecting pipe 3 connects the fan frame 1 and the smoke collecting hood 2 fluidly.

[0044] A fan system 4 is arranged in the fan rack 1. The fan system 4 is a double-inlet fan, and the axis of the fan system 4 extends in the left-right direction, that is, it takes in air from the input ends 41 and 42 on the left and right sides respectively. The left and right sides of the fan system 4 and the space between the fan rack 1 constitute a cold chamber Q respectively. The fan rack 1 includes a bottom plate 11 located at the bottom, and the bottom plate 11 is provided with a first notch 111 (the entrance of the fan rack 1) near the left and right sides respectively. The smoke hood 2 includes a hood body 21, which can be in a flat rectangular shape. A second notch 22 (the outlet of the smoke hood 2) is provided at the top of the hood body 21. The two second notches 22 are arranged on the left and right sides and are connected. Preferably, the whole formed by the two notches 22 is located in the middle position of the top of the hood body 21 in the left-right direction. An air inlet 23 is provided at the bottom of the hood body 21. There are two air inlets 23, which are arranged at intervals on the left and right sides. The smoke hood 2 also includes a smoke hood partition 24 disposed in the hood body 21 and located between the two second notches 22. The upper and lower ends of the smoke hood partition 24 extend to the second notches 22 and the bottom of the hood body 21, respectively, so as to isolate the passage between the air inlet 23 and the second notch 22 on the left side and the passage between the air inlet 23 and the second notch 22 on the right side from each other, so that the air inlet on the left side and the air inlet on the right side are independent of each other. The space on the left side of the smoke hood partition 24 in the hood body 21 forms a left smoke collecting chamber, and the space on the right side of the smoke hood partition 24 in the hood body 21 forms a right smoke collecting chamber. The connecting pipe 3 is hollow, and a narrow and long air duct is formed therein. The independent air duct can avoid turbulence.

[0045] The range hood further comprises a collecting box 5 and a regulator assembly, wherein the collecting box 5 is arranged corresponding to the above-mentioned second notch 22 and is located above the second notch 22. The collecting box 5 comprises a box body 53 with an open bottom, the box body 53 is a roughly rectangular parallelepiped, and the bottom of the box body 53 abuts against the top of the hood body 21. Two heating modules 7 are arranged in the box body 53, each heating module 7 corresponds to a second notch 22, and the two heating modules 7 are tightly arranged on the smoke hood partition 24, and the bottom of each heating module 7 is tightly against the top of the smoke hood partition 24. The left side wall of the box body 53 constitutes a first partition 54, and the right side wall of the box body 53 constitutes a second partition 55, and the first partition 54 and the second partition 55 both extend in the up-down direction. A circular first through-hole 541 is provided on the first partition 54, and a circular second through-hole 551 is provided on the second partition 55.

[0046] The regulator assembly includes a first regulator 61 and a second regulator 62. The first regulator 61 is arranged between the first baffle 54 and the connecting pipe 3 on the left, and the second regulator 62 is arranged between the second baffle 55 and the connecting pipe 3 on the right. The first regulator 61 and the second regulator 62 are both cylindrical. The end wall of the first regulator 61 close to the first baffle 54 is adapted to the shape and size of the first through hole 541, and the end wall of the second regulator 62 close to the second baffle 55 is adapted to the shape and size of the second through hole 551. The first regulator 61 and the second regulator 62 can rotate relative to the box body 53 and the connecting pipe 3, and the rotation axis is the axis of each regulator itself.

[0047] A fan-shaped first inlet 611 is provided on the end wall of the first regulator 61 close to the first partition 54, and the first inlet 611 is not connected to the center of the end wall. A fan-shaped second inlet 621 is provided on the end wall of the second regulator 62 close to the second partition 55, and the second inlet 621 is not connected to the center of the fourth partition 57. The first inlet 611 allows fluid communication between the box body 53 and the first regulator 61, and the second inlet 612 allows fluid communication between the box body 53 and the second regulator 62. The central angle between the first inlet 611 and the second inlet 621 is not greater than 180°.

[0048] A first outlet 612 is provided on the end wall of the first regulator 61 near the left connecting pipe 3, so that the first regulator 61 is fluidically connected to the left connecting pipe 3. A second outlet 622 is provided on the end wall of the second regulator 62 near the right connecting pipe 3, so that the second regulator 62 is fluidically connected to the right connecting pipe 3. Each connecting pipe 3 is fluidically connected to the fan rack 1, so that each air inlet 23 can be fluidically connected to the fan system 2.

[0049] The box body 53 is also provided with a third partition 56, a fourth partition 57 and a fifth partition 58. The third partition 56 extends transversely, preferably horizontally, thereby dividing the interior of the box body 53 into an upper chamber Q1 and a lower chamber Q2. The center of the end wall of the first regulator 61 corresponds to the third partition 56, and the center of the end wall of the second regulator 62 also corresponds to the third partition 56. Since the first inlet 611 is not connected to the center of the end wall of the first regulator 61, and the second inlet 621 is not connected to the center of the end wall of the second regulator 62, the upper chamber Q1 and the lower chamber Q2 will not be always connected due to the two inlets. Alternatively, the centers of the two end walls can also be made lower than the third partition, and in this case, each inlet can be connected to the center of the corresponding end wall.

[0050] The fourth partition plate 57 is tightly attached between the two heating modules 7, and the edges of the fourth partition plate 57 are respectively in contact with the upper end of the smoke hood partition plate 24 and the bottom surface of the third partition plate 56. The fifth partition plate 58 extends between the first partition plate 54 and the second partition plate 55, and extends to the top and bottom of the box body 53, and the rear end of the fourth partition plate 57 is in contact with the fifth partition plate 58. Preferably, the fourth partition plate 57 is located in the middle position of the box body 53 in the left-right direction. The space between the fourth partition plate 57 and the first partition plate 54 in the lower cavity Q2 constitutes the first cavity 51, and the space between the fourth partition plate 57 and the second partition plate 55 in the lower cavity Q2 constitutes the second cavity 52.

[0051] The third partition 56 is provided with a ventilation hole 561, which is preferably rectangular and extends forward from the position close to the fifth partition 58, and the length direction of the ventilation hole 561 is the left-right direction. The ventilation hole 561 is connected to the first chamber 51 and the second chamber 52. A flap 59 is arranged in the ventilation hole 561, and the depth of the flap 59 in the front-to-back direction is adapted to the ventilation hole 561, and the flap 59 can rotate around the axis extending in the front-to-back direction, and the rotation axis of the flap 59 can be flush with the third partition 56. The length of the flap 59 in the left-to-right direction is equivalent to half of the length of the ventilation hole 561, and the rotation axis of the flap 59 is located in the middle position of the ventilation hole 561 in the left-to-right direction, and also corresponds to the fourth partition 57. Therefore, the ventilation hole 561 is divided into a left part and a right part with the rotation axis of the flap 59 as the boundary, and the left part of the ventilation hole 561 corresponds to the first chamber 51, and the right part of the ventilation hole 561 corresponds to the second chamber 52. The flap 59 is always in a state of closing the left side portion of the ventilation hole 561 or the right side portion of the ventilation hole 561 .

[0052] The range hood further includes a first motion mechanism 60 for driving the flap 59 to rotate. To prevent the first motion mechanism 60 from being affected by the oil smoke, it is arranged on the rear side of the fifth partition 58, thereby being isolated from the oil smoke. The first motion mechanism 60 is a motor in this embodiment, and a drive mechanism capable of outputting torque in the prior art may also be used.

[0053] The first regulator 61 is rotatably supported between the connecting pipe 3 and the collecting box 5 on the left side, and the second regulator 62 is rotatably supported between the connecting pipe 3 and the collecting box 5 on the right side. The range hood also includes a second motion mechanism 63 for driving the first regulator 61 and the second regulator 62 to move. The second motion mechanism 63 has two, which independently drive the first regulator 61 and the second regulator 62 to rotate around their own axes (extending in the left and right directions). The second motion mechanism 63 is a motor in this embodiment, and a driving mechanism that can output torque in the prior art can also be used. It is arranged below the connecting pipe 3 and isolated from the connecting pipe 3.

[0054] The range hood further includes a heat dissipation structure, which includes a radiator 81 disposed in the fan frame 1 above each first notch 111, a heat dissipation plate 82 disposed under the bottom plate 11, and a heat dissipation fan 83 disposed under the bottom plate 11. The left and right sides of the heat dissipation plate 82 respectively overlap with the radiator 81 at the corresponding position, so that the heat dissipation plate 82 can effectively conduct heat to the radiator 81. The heat dissipation fan 83 is disposed on the top of the header box 5, see Figure 7 A narrow gap is formed between the rear of the connecting pipes 3 on the left and right sides and the wall 100 as the installation base of the range hood to facilitate the passage of fluid. Figure 7 As indicated by the arrow in .

[0055] Since there is a gap between the left and right connecting pipes 3 and the wall 100, and there is also a gap between the back of the range hood and the wall 100, when the cooling fan 83 is started, the heat on the heat sink 82 is recovered and blown to the gap between the wall 100 and the range hood, and the air in the gap is dried to reduce the mildew in the gap. This is heat recovery and reduces energy waste.

[0056] The oil smoke entering from the left and right air inlets 23 converges into the two heating chambers, the two heating modules 7 heat the incoming oil smoke, and the left and right radiators 81 dissipate heat for the gas entering the cold chamber Q. The air in each heating chamber forms a temperature difference with the air in each cold chamber Q, and the cold chamber Q is located above each heating chamber. According to the chimney effect in the heat exchange principle, the air has a difference in air density due to the temperature difference, thereby forming a pressure difference. The hot air rises along the chimney, is sucked in from the bottom of the chimney, and leaves at the top of the chimney, thereby making the air flow. In the invention, after the smoke generated during cooking enters the smoke collecting hood 2, it converges into the first chamber Q1 and the second chamber Q2. Under the action of the two heating modules 7, it is heated to form a hot end. At this time, the first chamber Q1 and the second chamber Q2 serve as the heating chamber. The air temperature inside the fan rack 1 is relatively low, and because the radiator 81 is arranged upstream of the left and right input ends of the fan rack 1, the air temperature can be further rapidly reduced, that is, the inside of the fan rack 1 is a cold end. According to the chimney effect, the air generates a pressure difference due to the temperature difference, and the gas continuously flows from the hot end to the cold end, that is, the gas is continuously sucked in from the air inlet 23 of the smoke hood 2. Combined with the suction force of the fan system 4, a greater negative pressure is generated at the air inlet 23 of the smoke hood 2, and a large amount of air can be sucked into the interior of the range hood, thereby improving the smoking effect.

[0057] According to the above principle, the flow rate on one side can be increased. For example, when the air volume on the left side needs to be increased but not on the right side, the heating module 7 on the left side is turned on and the heating module 7 on the right side is turned off, so that a chimney effect is formed on the left side and the air volume at the air inlet 23 on the left side is increased.

[0058] In addition, the present invention can also distribute the flow between the left and right sides. Figure 5 , when cooking on the left side with a high fire and cooking on the right side with a low fire, the first inlet 611 of the first regulator 61 on the left side rotates to the first chamber 51, and the second inlet 621 of the second regulator 62 on the right side rotates to be partially located in the second chamber 52, and the other part is located in the upper chamber Q1. In addition, the flap 59 closes the right side of the ventilation hole 561, and at this time, the first chamber 51, the left side of the ventilation hole 561, the upper chamber Q1, and the second inlet 621 of the second regulator 62 on the right side located in the upper chamber Q1 are connected. In other words, at this time, the flow of the left input end of the fan system 4 is all sucked from the first chamber 51, and the flow of the right input end of the fan system 4 is simultaneously distributed to the first chamber 51 and the second chamber 52. Then at this time, the total flow of the first chamber 51 is increased, and the air volume of the air inlet 23 on the left side is increased, and the smoking effect is improved.

[0059] Furthermore, in order to further increase the air volume of the air inlet 23 on the left side and reduce the gas flow loss, the heating module 7 on the left side can be started at this time. When the heating module 7 on the left side is started, the air passing through the heating module 7 on the left side is quickly heated, and the air duct on the left side forms a chimney effect, and the air volume is increased. And because part of the gas in the first chamber 51 will pass through the left part of the ventilation hole 561 and then enter the second regulator 62 after passing through the upper chamber Q1, there is a certain flow loss in this process. When the heating module 7 on the left side is started, the gas in the first chamber 51 will be heated, that is, the gas flowing into the upper chamber Q1 is hot gas, and the gas flowing through the second chamber 52 is normal temperature gas. These two gases are mixed in the second regulator 62 on the right side, and the temperature drops. That is to say, there is a certain temperature difference from the upper cavity Q1 to the second regulator 62. The air generates a pressure difference due to the temperature difference, and the hot air will quickly enter the second regulator 62 from the upper cavity Q1, thereby reducing flow losses, and this process further increases the flow rate of the upper cavity, that is, increases the air volume of the left air inlet 23, thereby improving the smoking effect.

[0060] In summary, by adjusting the ratio of the air inlet area of ​​the second inlet 621 of the second regulator 62 in the upper chamber Q1 and the second chamber 52, the temperature of the mixed gas in the right heating module 7 can be adjusted. When the area of ​​the upper chamber Q1 is small and the area of ​​the second chamber 52 is large, that is, there is less hot gas and more normal temperature gas, the temperature of the mixed gas is low. At this time, the temperature difference between the upper chamber Q1 and the second chamber 52 is large, and the flow loss in the upper chamber Q1 is reduced. When the area of ​​the upper chamber Q1 is large and the area of ​​the second chamber 52 is small, that is, there is more hot gas and less normal temperature gas, the temperature of the mixed gas is high. At this time, the temperature difference between the upper chamber Q1 and the second chamber 52 is small. Although the flow loss increases, the overall flow rate is large due to the large area of ​​the upper chamber Q1. In comparison, the flow loss can be ignored, and because the temperature of the mixed gas is high, that is, a hot end is formed in the second regulator 62, the air duct on the right forms a chimney effect, and the total air volume will be increased.

[0061] Vice versa, see Figure 6 . Figure 5 and Figure 6 The arrows in the figure show the flow path of the oil smoke.

[0062] When cooking on the left side and not cooking on the right side, the second inlet 621 of the second regulator 62 on the right side is completely immersed in the upper chamber Q1, and the flap 59 closes the right part of the ventilation hole 561. At this time, the flow of the left and right input ends of the fan system 4 all comes from the first chamber 51, and the smoking effect on the left side is greatly improved. On this basis, the heating module 7 on the left side is started, and the flow on the left side is further improved under the chimney effect. At this time, under the premise that the gear of the fan system 4 remains unchanged and the noise does not change, the air volume on the left side reaches the maximum, and the smoking effect is the best.

[0063] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A range hood, comprising a fan frame (1), a fume hood (2) arranged below the fan frame (1), and a fan system (4) arranged in the fan frame (1), wherein the fan system (4) is a double-inlet fan and comprises a left input end (41) and a right input end (42), and the axis of the fan system (4) extends in the left-right direction, the fume hood (2) comprises a hood body (21) and an air inlet (23) opened at the bottom of the hood body (21), and the air inlet (23) has two and is arranged at intervals on the left and right sides; and characterized in that: The left input end (41) of the fan system (4) can selectively be in fluid communication with the air inlet (23) on the left or the two air inlets (23), and the right input end (42) of the fan system (4) can selectively be in fluid communication with the air inlet (23) on the right or the two air inlets (23); The range hood further comprises a connecting pipe (3) in fluid communication with the fan frame (1), a header box (5) arranged on the cover body (21), and a regulator assembly, wherein the connecting pipe (3) has two connecting pipes and is arranged at intervals on the left and right sides, and the regulator assembly comprises a first regulator (61) arranged between the left side of the header box (5) and the connecting pipe (3) on the left side to connect the two fluids, and a second regulator (62) arranged between the right side of the header box (5) and the connecting pipe (3) on the right side to connect the two fluids; The collecting box (5) comprises a box body (53), the box body (53) is divided into an upper cavity (Q1) and a lower cavity (Q2), the lower cavity (Q2) is divided into a first cavity (51) and a second cavity (52) which are independently connected to two air inlets (23); The first chamber (51) can be directly in fluid communication with the first regulator (61) or in fluid communication with the first regulator (61) and / or the second regulator (62) through the upper chamber (Q1); the second chamber (52) can be directly in fluid communication with the second regulator (62) or in fluid communication with the first regulator (61) and / or the second regulator (62) through the upper chamber (Q1); The box body (53) is in the shape of a rectangular parallelepiped, the left side wall of the box body (53) constitutes a first partition (54), the right side wall of the box body (53) constitutes a second partition (55), the first partition (54) is provided with a circular first through hole (541), and the second partition (55) is provided with a circular second through hole (551); The first regulator (61) and the second regulator (62) are both cylindrical, the end wall of the first regulator (61) close to the first partition (54) is adapted to the shape and size of the first through hole (541), the end wall of the second regulator (62) close to the second partition (55) is adapted to the shape and size of the second through hole (551), the first regulator (61) and the second regulator (62) can rotate relative to the box (53) and the connecting pipe (3), and the rotation axis is the axis of each regulator itself; A first inlet (611) is provided on the end wall of the first regulator (61) close to the first partition (54), and the first inlet (611) can be rotated to completely correspond to the lower cavity (Q2), completely correspond to the upper cavity (Q1), or partially correspond to the upper cavity (Q1) and partially correspond to the lower cavity (Q2); a first outlet (612) is provided on the end wall of the first regulator (61) close to the left connecting pipe (3), so that the first regulator (61) and the left connecting pipe (3) are fluidically connected; The second regulator (62) is provided with a second inlet (621) on the end wall close to the second partition (55), and the second inlet (621) can be rotated to completely correspond to the lower cavity (Q2), completely correspond to the upper cavity (Q1), or partially correspond to the upper cavity (Q1) and partially correspond to the lower cavity (Q2); the second regulator (62) is provided with a second outlet (622) on the end wall close to the right connecting pipe (3), so as to connect the second regulator (62) and the right connecting pipe (3) fluid.

2. The range hood according to claim 1, characterized in that: The first inlet (611) and the second inlet (621) are both fan-shaped.

3. The range hood according to claim 1, characterized in that: A third partition (56), a fourth partition (57) and a fifth partition (58) are also provided in the box body (53); the upper cavity (Q1) and the lower cavity (Q2) are separated by the third partition (56); the first chamber (51) and the second chamber (52) are separated by the fourth partition (57); the fifth partition (58) extends between the first partition (54) and the second partition (55) and extends to the top and the bottom of the box body (53); the rear end of the fourth partition (57) abuts against the fifth partition (58); The third partition (56) is provided with a ventilation hole (561), and the ventilation hole (561) extends forward from a position close to the fifth partition (58). The ventilation hole (561) connects the first chamber (51) and the second chamber (52). The ventilation hole (561) has a left part corresponding to the first chamber (51) and a right part corresponding to the second chamber (52), and one of the left part and the right part of the ventilation hole (561) is selectively closed.

4. The range hood according to claim 3, characterized in that: A flap (59) is provided in the ventilation hole (561), the depth of the flap (59) in the front-to-back direction is adapted to the ventilation hole (561), and the flap (59) can rotate around an axis extending in the front-to-back direction, thereby selectively closing the left side portion or the right side portion of the ventilation hole (561).

5. The range hood according to claim 4, characterized in that: The rotation axis of the flap (59) is flush with the third partition (56), the length of the flap (59) in the left-right direction is equivalent to half the length of the ventilation hole (561), and the rotation axis of the flap (59) is located in the middle position of the ventilation hole (561) in the left-right direction and corresponds to the fourth partition (57).

6. The range hood according to any one of claims 1 to 5, characterized in that: The top of the hood body (21) is provided with two second notches (22), the two second notches (22) are arranged on the left and right and are connected, the smoke hood (2) further comprises a smoke hood partition (24) arranged in the hood body (21) and located between the two second notches (22), the upper and lower ends of the smoke hood partition (24) respectively extending to the second notches (22) and the bottom of the hood body (21), thereby isolating the passage between the left air inlet (23) and the second notch (22) and the passage between the right air inlet (23) and the second notch (22) from each other, so that the left air inlet and the right air inlet are independent of each other; The first chamber (51) corresponds to the second notch (22) on the left side and is thereby fluidly connected to the air inlet (23) on the left side, and the second chamber (52) corresponds to the second notch (22) on the right side and is thereby fluidly connected to the air inlet (23) on the right side.

7. The range hood according to any one of claims 1 to 5, characterized in that: A heating module (7) is provided in each of the first chamber (51) and the second chamber (52).

8. The range hood according to claim 7, characterized in that: The fan frame (1) comprises a bottom plate (11) located at the bottom, and the bottom plate (11) is provided with first notches (111) at positions close to left and right sides, respectively. The connecting pipe (3) is in fluid communication with the fan frame (1) through the first notches (111) at corresponding positions, thereby the space between the left and right sides of the fan system (4) and the fan frame (1) respectively forms a cold chamber (Q).

9. The range hood according to claim 7, characterized in that: The range hood further comprises a heat dissipation structure, wherein the heat dissipation structure comprises a radiator (81) arranged in the fan frame (1) at a position above each first notch (111).

10. The range hood according to claim 9, characterized in that: The heat dissipation structure also includes a heat dissipation plate (82) arranged below the bottom plate (11), and the left and right sides of the heat dissipation plate (82) respectively have overlapping portions with the radiator (81) at the corresponding position, so that the heat dissipation plate (82) conducts heat to the radiator (81).

11. The range hood according to claim 10, characterized in that: The heat dissipation structure also includes a heat dissipation fan (83) for blowing the heat dissipated by the heat dissipation plate (82) toward the gap between the range hood and the installation base.

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