Range hood

Abstract

The present invention provides a range hood, which relates to the technical field of range hood equipment, and is designed to solve the problem in the prior art that when the range hood is working, the oil smoke spreads around the air inlet, resulting in the range hood not completely absorbing the oil smoke and the oil smoke absorbing effect is not ideal. The range hood provided by the present invention includes: a main unit and a smoke collecting hood; the main unit has an air suction port and an air exhaust port connected to a smoke exhaust pipe; the smoke collecting hood has a smoke collecting channel connected to the air suction port, the smoke collecting hood is provided with a main air inlet and an auxiliary air inlet both arranged toward a stove, the auxiliary air inlet is arranged around the main air inlet, the main air inlet and the auxiliary air inlet are both connected to the smoke collecting channel, the air inlet area of ​​the main air inlet and the air inlet area of ​​the air suction port are ratio a, and 0.6≤a≤0.9.

Description

Technical Field

[0001] The invention relates to the technical field of range hood equipment, and in particular to a range hood. Background Art

[0002] With the development of society and the progress of science and technology, people enjoy the fun of cooking while enjoying delicious food. As a common household appliance, the range hood has been widely used in the kitchen. The range hood can quickly extract the waste from the stove combustion and the oil smoke generated during the cooking process that is harmful to the human body and discharge it outdoors. At the same time, it condenses and collects the oil smoke, reduces pollution, purifies the air, and has a safety guarantee function of anti-toxicity and explosion-proof. Therefore, the range hood allows people to cook in a kitchen without oil smoke, providing people with a good cooking environment.

[0003] The main unit of a range hood generally includes a casing, a bellows and a fan. The fan is arranged in the bellows. When the fan is started, a negative pressure is formed in the bellows, so that harmful gases such as oil smoke in the kitchen are sucked into the bellows and discharged to the outside through the exhaust duct, thereby ensuring an oil smoke-free environment in the kitchen.

[0004] When the range hood in the prior art is working, the oil smoke is easily diffused around the air inlet before entering the range hood, resulting in the range hood not completely absorbing the oil smoke and the oil smoke absorbing effect is not ideal. Summary of the invention

[0005] The purpose of the present invention is to provide a range hood to solve the technical problem in the prior art that when the range hood is working, the oil smoke diffuses around the air inlet, resulting in incomplete absorption of the oil smoke by the range hood and unsatisfactory oil smoke absorption effect.

[0006] The range hood provided by the present invention comprises a main unit and a fume collecting hood.

[0007] The main unit has an air intake port and an air exhaust port connected to a smoke exhaust duct.

[0008] The smoke hood has a smoke collection channel connected with the air suction port, the smoke hood is provided with a main air inlet and an auxiliary air inlet both facing the stove, the auxiliary air inlet is arranged around the main air inlet, the main air inlet and the auxiliary air inlet are both connected with the smoke collection channel, the ratio of the air inlet area of ​​the main air inlet to the air inlet area of ​​the air suction port is a, and 0.6≤a≤0.9.

[0009] Furthermore, the smoke collecting hood includes a main smoke collecting wall and a side smoke collecting wall connected to an edge of the main smoke collecting wall.

[0010] The main smoke collecting wall and the side smoke collecting wall are arranged to form a smoke collecting cavity with an opening, and the opening of the smoke collecting cavity is arranged toward the stove.

[0011] The main air inlet is arranged on the main smoke collecting wall.

[0012] Furthermore, both sides of the main smoke collecting wall are connected to the side smoke collecting walls, and the two side smoke collecting walls are both protruding from the main smoke collecting wall and arranged downward.

[0013] The auxiliary air inlet comprises a first auxiliary air inlet, and both of the two side smoke collecting walls are provided with the first auxiliary air inlet.

[0014] Furthermore, the auxiliary air inlet also includes a second auxiliary air inlet, and the second auxiliary air inlet is opened on the main smoke collecting wall; the second auxiliary air inlet is located on both sides of the main air inlet.

[0015] Furthermore, the width of the main air inlet is consistent with the width of the air suction port, the ratio of the length of the main air inlet to the length of the air suction port is a, and 0.6≤a≤0.9.

[0016] Furthermore, the ratio of the total cross-sectional area of ​​the main air inlet to the total cross-sectional area of ​​the auxiliary air inlet is b, and (5:5)≤b≤(8:2).

[0017] Furthermore, a ratio b of a total cross-sectional area of ​​the main air inlet to a total cross-sectional area of ​​the auxiliary air inlet is 6:4.

[0018] Furthermore, the range hood further comprises a connection plate for connecting the main unit and the fume hood.

[0019] The connecting plate has a connecting portion and a ventilation structure, the main unit is fixedly connected to the smoke collecting hood via the connecting portion, and the air suction port is communicated with the smoke collecting channel via the ventilation structure.

[0020] Furthermore, the ventilation structure includes a main air duct and a side air duct.

[0021] The side air duct is connected to the outer periphery of the main air duct in a surrounding manner, and the connecting portion is fixedly connected to the outer side of the side air duct.

[0022] The main air duct extends from the air suction port to the main air inlet, with one end of the main air duct facing the main air inlet and the other end connected to the air suction port; one end of the side air duct is connected to the auxiliary air inlet through the smoke collection channel, and the other end is connected to the air suction port.

[0023] Furthermore, the main air inlet is equipped with a first oil screen.

[0024] The cross-sectional area of ​​a single air inlet hole of the auxiliary air inlet is larger than the cross-sectional area of ​​a single mesh hole of the first oil net.

[0025] The beneficial effects brought by the range hood provided by the present invention are:

[0026] The range hood provided by the present invention comprises: a main unit and a smoke collecting hood; the main unit has an air suction port and an air exhaust port connected to a smoke exhaust duct; the smoke collecting hood has a smoke collecting channel connected to the air suction port, the smoke collecting hood is provided with a main air inlet and an auxiliary air inlet both arranged toward a stove, the auxiliary air inlet is arranged around the main air inlet, the main air inlet and the auxiliary air inlet are both connected to the smoke collecting channel, the ratio of an air inlet area of ​​the main air inlet to an air inlet area of ​​the air suction port is a, and 0.6≤a≤0.9.

[0027] By utilizing the above structure, during the operation of the range hood, the main unit is started and negative pressure is formed in the bellows of the main unit. Since the air suction port and the main air inlet are connected through the smoke collecting channel, negative pressure is generated at the main air inlet, which absorbs the surrounding smoke and guides the oil smoke above the stove body to flow toward the main air inlet. When the oil smoke approaches the main air inlet, most of the oil smoke is sucked into the main air inlet, and a small amount of oil smoke diffuses to the periphery of the main air inlet. The oil smoke entering the main air inlet enters the air suction port through the smoke collecting channel and enters the smoke exhaust duct through the exhaust port, and is discharged outdoors. The auxiliary air inlet is arranged around the main air inlet. Since the air intake and the auxiliary air inlet are connected through the smoke collecting channel, the bellows of the main unit also forms a negative pressure at the auxiliary air inlet to absorb smoke. When part of the oil smoke diffuses to the auxiliary air inlet, the oil smoke is captured by the auxiliary air inlet, and the auxiliary air inlet directly sucks the diffused oil smoke into the smoke collecting channel. The oil smoke enters the air intake through the smoke collecting channel and enters the smoke exhaust duct through the exhaust port, and is discharged to the outdoors.

[0028] When the ratio a of the air inlet area of ​​the main air inlet to the air inlet area of ​​the suction port is 0.6≤a≤0.9, the main air inlet can serve as the main exhaust port to absorb most of the oil smoke. At the same time, the main unit can provide negative pressure to the auxiliary air inlet so that the auxiliary air inlet can thoroughly absorb the diffused oil smoke, ensuring that the range hood has a good oil fume extraction effect.

[0029] In the above structure, the main air inlet sucks in most of the oil smoke, while the auxiliary air inlet located around the main air inlet captures the diffused oil smoke and sucks it into the smoke collecting channel, thereby preventing part of the diffused oil smoke from spreading to the kitchen environment. Compared with the range hood structure in the prior art that is unable to capture the diffused oil smoke, the above structure utilizes the auxiliary air inlet to be arranged around the main air inlet to avoid the diffusion and overflow of oil smoke, thereby solving the technical problem in the prior art that when the range hood is working, the oil smoke diffuses around the air inlet, resulting in incomplete absorption of the oil smoke by the range hood and unsatisfactory oil fume absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 One of the first structural schematic diagrams of the range hood provided by the embodiment of the present invention;

[0032] Figure 2 A second schematic diagram of the first structure of the range hood provided by the embodiment of the present invention;

[0033] Figure 3 A second structural schematic diagram of a range hood provided by an embodiment of the present invention;

[0034] Figure 4 An internal schematic diagram of a first structure of a range hood provided by an embodiment of the present invention;

[0035] Figure 5 A schematic structural diagram of a connection plate of a range hood provided by an embodiment of the present invention;

[0036] Figure 6 This is a third schematic diagram of the first structure of the range hood provided in the embodiment of the present invention.

[0037] Icons: 100 - smoke hood; 110 - main smoke collecting wall; 111 - main air inlet; 120 - side smoke collecting wall; 121 - auxiliary air inlet; 121a - first auxiliary air inlet; 121b - second auxiliary air inlet; 130 - smoke collecting chamber; 140 - smoke collecting channel; 200 - main unit; 210 - fan; 220 - bellows; 300 - connecting plate; 310 - main air duct; 320 - side air duct; 330 - connecting part; 400 - first oil net; 500 - second oil net. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that in the description of the present invention, the terms "first", "second", "third" and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "connection" and "installation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or connected through an intermediate medium; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0041] Specific structure such as Figure 1 - Figure 6 shown.

[0042] The present embodiment provides a range hood, comprising: a main unit 200 and a fume collecting hood 100 .

[0043] The host 200 has an air intake port and an air exhaust port connected to a smoke exhaust duct.

[0044] The smoke hood 100 has a smoke collecting channel 140 connected to the air suction port. The smoke hood 100 is provided with a main air inlet 111 and an auxiliary air inlet 121 both of which are arranged toward the stove. The auxiliary air inlet 121 is arranged around the main air inlet 111. The main air inlet 111 and the auxiliary air inlet 121 are both connected to the smoke collecting channel 140. The ratio of the air inlet area of ​​the main air inlet 111 to the air inlet area of ​​the air suction port is a, and 0.6≤a≤0.9.

[0045] With the above structure, during the operation of the range hood, the main unit 200 is started, and negative pressure is formed in the bellows 220 of the main unit 200. Since the air intake port and the main air inlet 111 are connected through the smoke collecting channel 140, negative pressure is generated at the position of the main air inlet 111, which absorbs the surrounding smoke, thereby guiding the oil smoke above the stove body to flow toward the main air inlet 111. When the oil smoke approaches the main air inlet 111, most of the oil smoke is sucked into the main air inlet 111, and a small amount of oil smoke diffuses to the periphery of the main air inlet 111. The oil smoke entering the main air inlet 111 enters the air intake port through the smoke collecting channel 140, and enters the smoke exhaust duct through the exhaust port, and is discharged outdoors. The auxiliary air inlet 121 is arranged around the main air inlet 111. Since the air intake port and the auxiliary air inlet 121 are connected through the smoke collecting channel 140, the bellows 220 of the main unit 200 also forms a negative pressure at the auxiliary air inlet 121 to absorb smoke. When part of the oil smoke diffuses to the auxiliary air inlet 121, the oil smoke is captured by the auxiliary air inlet 121, and the auxiliary air inlet 121 directly sucks the diffused oil smoke into the smoke collecting channel 140. The oil smoke enters the air intake port through the smoke collecting channel 140, and enters the smoke exhaust duct through the exhaust port, and is discharged to the outdoors.

[0046] In the above structure, the main air inlet 111 sucks in most of the oil smoke, and the auxiliary air inlet 121 located around the main air inlet 111 captures the diffused oil smoke and sucks it into the smoke collecting channel 140, thereby preventing part of the diffused oil smoke from diffusing to the kitchen environment. Compared with the range hood structure in the prior art that is unable to capture the diffused oil smoke, the above structure utilizes the auxiliary air inlet 121 arranged around the main air inlet 111 to avoid the diffusion and overflow of oil smoke, thereby solving the technical problem in the prior art that when the range hood is working, the oil smoke diffuses around the air inlet, resulting in incomplete absorption of the oil smoke by the range hood and unsatisfactory oil fume absorption effect.

[0047] Experiments were conducted on multiple groups of structures with different ratios of the air inlet area of ​​the main air inlet 111 to the air inlet area of ​​the air suction port, and the oil fume absorption effects of the main air inlet 111 and the auxiliary air inlet 121 were examined. The results showed that when the ratio of the air inlet area of ​​the main air inlet 111 to the air inlet area of ​​the air suction port a < 0.6, the flow velocity of the main air inlet 111 is relatively low, and most of the oil fume directly enters the smoke collecting channel 140 from the auxiliary air inlet 121. However, since the total cross-sectional area of ​​the auxiliary air inlet 121 is relatively small, it cannot serve as the main oil fume absorption port, and it is difficult to quickly absorb a large amount of oil fume in an instant, which easily causes the oil fume to overflow, resulting in a decrease in the oil fume absorption effect of the whole machine. When the ratio of the air inlet area of ​​the main air inlet 111 to the air inlet area of ​​the suction port a>0.9, the negative pressure provided by the main unit 200 to the auxiliary air inlet 121 is relatively small, which reduces the suction force of the auxiliary air inlet 121 on oil smoke, seriously affecting the auxiliary air inlet 121's absorption of diffused oil smoke, and seriously reducing the effectiveness of the auxiliary air inlet 121.

[0048] The experimental results show that when the ratio a of the air inlet area of ​​the main air inlet 111 to the air inlet area of ​​the air suction port is 0.6≤a≤0.9, the main air inlet 111 can be used as the main exhaust port to absorb most of the oil smoke. At the same time, the main unit 200 can provide negative pressure to the auxiliary air inlet 121 so that the auxiliary air inlet 121 can thoroughly absorb the diffused oil smoke, ensuring that the range hood has a good oil fume extraction effect.

[0049] It should be noted that the host 200 includes a bellows 220 and a fan 210, the air inlet and the air outlet are respectively provided at both ends of the bellows 220, and the fan 210 is arranged inside the bellows 220. When the fan 210 is running, negative pressure is generated inside the bellows 220, thereby guiding the oil smoke into the range hood. The specific working principle of the host 200 can refer to the prior art.

[0050] In an optional technical solution of this embodiment, the smoke collecting hood 100 includes a main smoke collecting wall 110 and a side smoke collecting wall 120 connected to the edge of the main smoke collecting wall 110 .

[0051] The main smoke collecting wall 110 and the side smoke collecting wall 120 are arranged to form a smoke collecting cavity 130 having an opening, and the opening of the smoke collecting cavity 130 is arranged toward the stove.

[0052] The main air inlet 111 is opened on the main smoke collecting wall 110 .

[0053] Preferably, the main smoke collecting wall 110 and the side smoke collecting wall 120 are arranged to form a smoke collecting chamber 130 with an opening. The oil smoke generated by the stove moves toward the smoke collecting hood 100 under the guidance of the range hood, and gradually enters the smoke collecting chamber 130 through the opening. When the oil smoke reaches the main smoke collecting wall 110, most of the oil smoke enters the smoke collecting channel 140 through the main air inlet 111 on the main smoke collecting wall 110, and is discharged through the main unit 200. When part of the oil smoke reaches the main smoke collecting wall 110, it diffuses to the periphery along the main smoke collecting wall 110 in the smoke collecting chamber 130. When the oil smoke contacts the auxiliary air inlet 121, it is captured by the auxiliary air inlet 121, and then enters the smoke collecting channel 140 and is discharged through the main unit 200.

[0054] In the above structure, the smoke collecting chamber 130 of the semi-enclosed structure surrounded by the main smoke collecting wall 110 and the side smoke collecting wall 120 utilizes the side smoke collecting wall 120 to block the oil smoke, and has a good collection and diffusion prevention effect on the oil smoke entering therein, so that the oil smoke circulates in the smoke collecting chamber 130 along the main smoke collecting wall 110 and between the side smoke collecting walls 120, thereby extending the oil smoke absorption time of the main air inlet 111 and the auxiliary air inlet 121, and further improving the oil smoke absorption effect of the range hood.

[0055] Preferably, the front of the range hood is the cooking area for the cook. The main smoke collecting wall 110 is located directly above the stove, and includes a flat wall portion and an inclined wall portion. The flat wall portion is connected to the front end of the inclined wall portion, the flat wall portion is horizontally arranged, and the inclined wall portion is gradually inclined downward from the inclined wall portion to the rear. The main air inlet 111 is opened in the inclined wall portion, so the main air inlet 111 is gradually inclined downward from the front to the rear. This structure allows the oil smoke to flow from the stove body to the upper and rear oblique direction, thereby minimizing the probability of the oil smoke spreading forward.

[0056] In an optional technical solution of the present embodiment, both sides of the main smoke collecting wall 110 are connected to the side smoke collecting walls 120 , and the two side smoke collecting walls 120 are both protruding from the main smoke collecting wall 110 and arranged downward.

[0057] The auxiliary air inlet 121 includes a first auxiliary air inlet 121 a , and both side smoke collecting walls are provided with a first auxiliary air inlet 121 a .

[0058] Preferably, the two side smoke collecting walls 120 are respectively connected to the two sides of the main smoke collecting wall 110, and the two side smoke collecting walls 120 extend downward, the front ends of the two side smoke collecting walls 120 are connected to the front end of the flat wall portion, and the rear ends are connected to the rear end of the inclined wall portion, and the bottoms of the two side smoke collecting walls 120 are a structure that gradually tilts downward from front to back.

[0059] Preferably, the smoke collecting hood 100 further comprises a shell cover, which is arranged above the main smoke collecting wall 110 and the side smoke collecting wall 120 and forms a seal with the main smoke collecting wall 110 and the side smoke collecting wall 120, and a smoke collecting channel 140 is formed between the shell cover and the main smoke collecting wall 110 and the side smoke collecting wall 120. An opening communicating with the air inlet is provided at the top of the shell cover.

[0060] Preferably, the first auxiliary air inlet 121a is opened on the side smoke collecting wall 120, and the oil smoke enters the smoke collecting chamber 130. Some of the oil smoke that is not absorbed by the main air inlet 111 diffuses to the surrounding along the main smoke collecting wall 110. When the oil smoke diffuses to the side smoke collecting wall 120, the first auxiliary air inlet 121a absorbs the oil smoke to prevent the oil smoke from overflowing the smoke collecting chamber 130.

[0061] In the optional technical solutions of this embodiment, the main reference is Figure 3 The auxiliary air inlet 121 also includes a second auxiliary air inlet 121b, which is opened on the main smoke collecting wall 110; the second auxiliary air inlet 121b is located on both sides of the main air inlet 111.

[0062] Preferably, the main smoke collecting wall 110 is provided with a second auxiliary air inlet 121b, which is provided on both sides of the air outlet of the main unit 200, and the two second auxiliary air inlets 121b are respectively located between the main air inlet 111 and the two side smoke collecting walls 120. With this structure, when the oil smoke enters the smoke collecting chamber 130, part of the oil smoke that is not absorbed by the main air inlet 111 diffuses to the periphery along the main smoke collecting wall 110. During the diffusion process, the second auxiliary air inlet 121b of the main smoke collecting wall 110 can absorb the oil smoke. When the oil smoke diffuses to the side smoke collecting wall 120, the first auxiliary air inlet 121a of the side smoke collecting wall 120 can also absorb the oil smoke. This structure expands the range of the auxiliary air inlet 121 to absorb the oil smoke, ensuring that the oil smoke can be absorbed thoroughly and preventing the oil smoke from overflowing the smoke collecting chamber 130.

[0063] It should be noted that the above-mentioned first auxiliary air inlet 121a and the second auxiliary air inlet 121b are used to distinguish the positions of the auxiliary air inlet 121, and should not be simply understood as distinguishing the structures of the auxiliary air inlet 121. The structure between the first auxiliary air inlet 121a and the second auxiliary air inlet 121b can be two parts of the same auxiliary air inlet 121 structure, or can be two auxiliary air inlets 121 with different structures.

[0064] In the optional technical solution of this embodiment, the width of the main air inlet 111 is consistent with the width of the air suction port, the ratio of the length of the main air inlet 111 to the length of the air suction port is a, and 0.6≤a≤0.9.

[0065] It should be noted that the distance along which the main air inlet 111 extends obliquely in the front-to-back direction is the width of the main air inlet 111 , and the distance along which the main air inlet 111 extends to both sides in the front-to-back direction is the length of the main air inlet 111 .

[0066] Preferably, the span of the range hood in the length direction is much larger than its width span, so the adjustment range of the main air inlet 111 in the width direction is not large. When testing the air intake effect of the main air inlet 111, the width of the main air inlet 111 is locked to make it consistent with the width of the air intake port.

[0067] The width of the main air inlet 111 is locked to be consistent with the width of the air suction port, and multiple groups of structures with different ratios of the length of the main air inlet 111 to the length of the air suction port are tested to examine the oil fume absorption effects of the main air inlet 111 and the auxiliary air inlet 121. The results show that when the ratio of the length of the main air inlet 111 to the length of the air suction port a is less than 0.6, the flow velocity of the main air inlet 111 is low, and most of the oil fume enters the smoke collecting channel 140 directly from the auxiliary air inlet 121. However, due to the small total cross-sectional area of ​​the auxiliary air inlet 121, it cannot serve as the main oil fume suction port. It is difficult to quickly absorb a large amount of oil fume in an instant, which easily causes the oil fume to overflow, resulting in a decrease in the oil fume absorption effect of the whole machine. When the ratio of the length of the main air inlet 111 to the length of the air suction port a>0.9, the negative pressure provided by the main unit 200 to the auxiliary air inlet 121 is relatively small, which reduces the suction force of the auxiliary air inlet 121 on oil smoke, seriously affecting the auxiliary air inlet 121's absorption of diffused oil smoke, and seriously reducing the effectiveness of the auxiliary air inlet 121.

[0068] The experimental results show that when the ratio a of the length of the main air inlet 111 to the length of the air suction port is 0.6≤a≤0.9, the main air inlet 111 can serve as the main exhaust port to absorb most of the oil smoke. At the same time, the main unit 200 can provide negative pressure to the auxiliary air inlet 121 so that the auxiliary air inlet 121 can thoroughly absorb the diffused oil smoke, ensuring that the range hood has a good oil smoke absorption effect.

[0069] In an optional technical solution of this embodiment, the ratio of the total cross-sectional area of ​​the main air inlet 111 to the total cross-sectional area of ​​the auxiliary air inlet 121 is b, and (5:5)≤b≤(8:2).

[0070] Preferably, based on the condition that the ratio a of the length of the main air inlet 111 to the length of the air suction port is 0.6≤a≤0.9, by adjusting the ratio of the total cross-sectional area of ​​the main air inlet 111 to the total cross-sectional area of ​​the auxiliary air inlet 121, the cooperation of the main air inlet 111 and the auxiliary air inlet 121 in absorbing oil smoke is investigated, and the test results are shown in the following table:

[0071]

[0072] It can be seen from the above data that when the ratio of the total cross-sectional area of ​​the main air inlet 111 to the total cross-sectional area of ​​the auxiliary air inlet 121 is 5:5<b<8:2, the proportion of the main air inlet 111 and the auxiliary air inlet 121 cooperating to absorb oil smoke is above 75%. Compared with the range hood structure with only the main air inlet 111, the structure in which the main air inlet 111 and the auxiliary air inlet 121 cooperate to absorb oil smoke has a good oil fume absorption effect.

[0073] It can be seen from the data in the above table that when the ratio of the total cross-sectional area of ​​the main air inlet 111 to the total cross-sectional area of ​​the auxiliary air inlet 121 is b<5:5, the ratio of the main air inlet 111 and the auxiliary air inlet 121 to absorb oil smoke is b<76%. Within this ratio range, the total cross-sectional area of ​​the main air inlet 111 is too small, and the main engine 200 air inlet has a limited degree of absorbing oil smoke, causing a large amount of oil smoke to diffuse, while the total cross-sectional area of ​​the auxiliary air intake is too small, and the degree of absorbing oil smoke is limited, so that within this ratio range, the ratio of the main air inlet 111 and the auxiliary air inlet 121 to absorb oil smoke is not good.

[0074] When the ratio of the total cross-sectional area of ​​the main air inlet 111 to the total cross-sectional area of ​​the auxiliary air inlet 121 is b>8:2, the ratio b of the main air inlet 111 and the auxiliary air inlet 121 in absorbing oil smoke is less than 75%. Within this ratio range, the total cross-sectional area of ​​the main air inlet 111 is too large, and the partial pressure on the main unit 200 is too large, which makes the partial pressure at the auxiliary air inlet 121 smaller, and reduces the suction force of the auxiliary air inlet 121 for oil smoke, which seriously affects the auxiliary air inlet 121 in absorbing diffused oil smoke, and seriously reduces the effectiveness of the auxiliary air inlet 121.

[0075] In an optional technical solution of this embodiment, the ratio b of the total cross-sectional area of ​​the main air inlet 111 to the total cross-sectional area of ​​the auxiliary air inlet 121 is 6:4.

[0076] It can be seen from the data in the above table that when the ratio of the total cross-sectional area of ​​the main air inlet 111 to the total cross-sectional area of ​​the auxiliary air inlet 121 is 5:5≤b<6:4, the proportion of the main air inlet 111 and the auxiliary air inlet 121 cooperating to absorb oil smoke gradually increases; when the ratio of the total cross-sectional area of ​​the main air inlet 111 to the total cross-sectional area of ​​the auxiliary air inlet 121 is 6:4<b≤8:2, the proportion of the main air inlet 111 and the auxiliary air inlet 121 cooperating to absorb oil smoke gradually decreases; when the ratio of the total cross-sectional area of ​​the main air inlet 111 to the total cross-sectional area of ​​the auxiliary air inlet 121 is b=6:4, the proportion of the main air inlet 111 and the auxiliary air inlet 121 cooperating to absorb oil smoke reaches the best.

[0077] In an optional technical solution of this embodiment, the range hood further includes a connection plate 300 for connecting the main unit 200 and the fume hood 100 .

[0078] The connection plate 300 has a connection portion 330 and a ventilation structure. The host 200 and the smoke collecting hood 100 are fixedly connected via the connection portion 330 , and the air inlet and the smoke collecting channel 140 are communicated via the ventilation structure.

[0079] Preferably, the connection plate 300 is used to fix the main unit 200 and the fume hood 100 to ensure that the connection between the main unit 200 and the fume hood 100 is stable and can conduct the oil smoke.

[0080] In an optional technical solution of this embodiment, the ventilation structure includes a main air duct 310 and a side air duct 320 .

[0081] The side air duct 320 is connected to the outer periphery of the main air duct 310 , and the connecting portion 330 is fixedly connected to the outer side of the side air duct 320 .

[0082] The main air duct 310 extends from the air suction port to the main air inlet 111, with one end of the main air duct 310 facing the main air inlet 111 and the other end connected to the air suction port; one end of the side air duct 320 is connected to the auxiliary air inlet 121 through the smoke collection channel 140, and the other end is connected to the air suction port.

[0083] With the above structure, the oil smoke enters the smoke collecting channel 140 from the main air inlet 111, and enters the main air duct 310 through one end of the main air duct 310 in the smoke collecting channel 140 facing the main air inlet 111. The oil smoke can be directly sucked into the main unit 200 through the main air duct 310 and discharged to the outside. The partially diffused oil smoke is sucked into the smoke collecting channel 140 by the auxiliary air inlet 121, flows into the fan 210 through the side air duct 320, and is discharged to the outside.

[0084] Preferably, the connection plate 300 includes an air duct housing, the air duct housing has a through hollow cavity, the hollow cavity forms a main air duct 310, and the end of the air duct housing close to the main unit 200 has a first flange facing outward, the first flange is provided with a side through hole, and the side through hole forms a side air duct 320. The edge of the first flange has a second flange protruding from the plane of the first flange, and the second flange forms a connecting portion 330 for connecting the main unit 200 and the smoke hood 100.

[0085] Preferably, the host 200 and the smoke collecting hood 100 are both fixedly connected to the connecting portion 330 by bolts.

[0086] Preferably, the main air duct 310 is used to transmit the oil fume entering the main air inlet 111, and the side air duct 320 is used to transmit the oil fume entering the auxiliary air inlet 121, so that the oil fume flowing in from the main air inlet 111 is isolated from the oil fume entering from the auxiliary air inlet 121, thereby preventing the oil fume entering from the main air inlet 111 from interfering with the oil fume entering from the auxiliary air inlet 121 and affecting the effect of absorbing the oil fume.

[0087] In an optional technical solution of this embodiment, a first oil screen 400 is installed at the main air inlet 111 .

[0088] The cross-sectional area of ​​a single air inlet hole of the auxiliary air inlet 121 is greater than the cross-sectional area of ​​a single mesh hole of the first oil net 400 .

[0089] Preferably, the first oil net 400 is used to filter the oil smoke entering the main air inlet 111 to prevent debris from being sucked into the main unit 200 and causing the range hood to malfunction.

[0090] Preferably, the auxiliary air inlet 121 is installed with a second oil net 500, and the second oil net 500 is used to filter the oil smoke entering the auxiliary air inlet 121 to prevent debris from being sucked into the main unit 200 and causing the range hood to malfunction.

[0091] Preferably, the first oil net 400 is composed of a plurality of adjacently arranged mesh holes, which are used to conduct oil smoke. The cross-sectional area of ​​a single mesh hole of the first oil net 400 is smaller than the cross-sectional area of ​​a single mesh hole of the second oil net 500. This structure reduces the wind resistance of oil smoke passing through the second oil net 500, which is beneficial for absorbing and collecting part of the diffused oil smoke, further improving the smoke extraction effect of the range hood.

[0092] Preferably, the mesh of the second oil net 500 is a long hole structure, which is extended along the diffusion direction of the oil smoke, further reducing the resistance of the oil smoke entering the auxiliary air inlet 121, thereby improving the effect of the auxiliary air inlet 121 in absorbing the oil smoke.

[0093] Preferably, a detachable oil collecting box is installed at the bottom of the smoke collecting channel 140. The first oil net 400 and the second oil net 500 can filter the oil smoke while intercepting part of the oil in the oil smoke, so that the oil adheres to the first oil net 400 and the second oil net 500 and falls into the oil collecting box. The detachable structure of the oil collecting box facilitates the regular disassembly and cleaning of the oil collecting box.

[0094] In addition, the auxiliary air inlet 121 may be directly opened in the smoke hood 100 without the second oil net 500 , and the cross-sectional area of ​​a single air inlet hole of the auxiliary air inlet 121 is larger than the cross-sectional area of ​​a single mesh of the first oil net 400 .

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A range hood, characterized in that: include: A main machine (200) and a fume hood (100); The main unit (200) has an air intake port and an air exhaust port connected to a smoke exhaust duct; The smoke collecting hood (100) has a smoke collecting passage (140) connected to the air suction port, the smoke collecting hood (100) is provided with a main air inlet (111) and an auxiliary air inlet (121) both of which are arranged toward the stove, the auxiliary air inlet (121) is arranged around the main air inlet (111), the main air inlet (111) and the auxiliary air inlet (121) are both connected to the smoke collecting passage (140), the ratio of the air inlet area of ​​the main air inlet (111) to the air inlet area of ​​the air suction port is a, and 0.6≤a≤0.9; The smoke collecting hood (100) comprises a main smoke collecting wall (110) and a side smoke collecting wall (120) connected to the edge of the main smoke collecting wall (110); The main smoke collecting wall (110) and the side smoke collecting wall (120) are arranged to form a smoke collecting cavity (130) having an opening, and the opening of the smoke collecting cavity (130) is arranged toward the stove; The main air inlet (111) is opened on the main smoke collecting wall (110); Both sides of the main smoke collecting wall (110) are connected to the side smoke collecting walls (120), and the two side smoke collecting walls (120) are both protruding from the main smoke collecting wall (110) and arranged downward; The auxiliary air inlet (121) comprises a first auxiliary air inlet (121a), and the two side smoke collecting walls are both provided with the first auxiliary air inlet (121a); The auxiliary air inlet (121) further comprises a second auxiliary air inlet (121b), wherein the second auxiliary air inlet (121b) is opened on the main smoke collecting wall (110); the second auxiliary air inlet (121b) is located on both sides of the main air inlet (111); the two second auxiliary air inlets (121b) are respectively located between the main air inlet (111) and the two side smoke collecting walls (120); The range hood further comprises a connection plate (300) for connecting the main unit (200) and the fume collecting hood (100); The connecting plate (300) has a connecting portion (330) and a ventilation structure, the main unit (200) and the smoke collecting hood (100) are fixedly connected via the connecting portion (330), and the air suction port and the smoke collecting channel (140) are connected via the ventilation structure; The ventilation structure comprises a main air duct (310) and a side air duct (320); The side air duct (320) is connected to the outer periphery of the main air duct (310) in a surrounding manner, and the connecting portion (330) is fixedly connected to the outer side of the side air duct (320); The main air duct (310) is extended from the air suction port to the main air inlet (111), one end of the main air duct (310) faces the main air inlet (111), and the other end is connected to the air suction port; one end of the side air duct (320) is connected to the auxiliary air inlet (121) through the smoke collecting channel (140), and the other end is connected to the air suction port.

2. The range hood according to claim 1, characterized in that: The width of the main air inlet (111) is consistent with the width of the air suction port, the ratio of the length of the main air inlet (111) to the length of the air suction port is a, and 0.6≤a≤0.

9.

3. The range hood according to claim 2, characterized in that: The ratio of the total cross-sectional area of ​​the main air inlet (111) to the total cross-sectional area of ​​the auxiliary air inlet (121) is b, and (5:5)≤b≤(8:2).

4. The range hood according to claim 1, characterized in that: The ratio b of the total cross-sectional area of ​​the main air inlet (111) to the total cross-sectional area of ​​the auxiliary air inlet (121) is 6:

4.

5. The range hood according to claim 1, characterized in that: The main air inlet (111) is equipped with a first oil screen (400); The cross-sectional area of ​​a single air inlet hole of the auxiliary air inlet (121) is greater than the cross-sectional area of ​​a single mesh hole of the first oil net (400).

Images