Air draft device and range hood with same

Abstract

The utility model relates to the technical field of ventilation equipment, in particular to an air draft device and a range hood with the same. The air draft device comprises a shell, a fan assembly and an air exhaust and liquid guide connector, the shell is provided with a cavity, and the cavity is provided with an air inlet; the fan assembly comprises a surrounding plate, a motor and a turbine, the two sides of the surrounding plate are connected with the two oppositely-arranged wall faces of the shell respectively, the surrounding plate and the two oppositely-arranged wall faces of the shell form a fan cavity, the turbine is arranged in the fan cavity, the motor is fixed to the fan cavity and connected with the turbine, and the air inlet is communicated with the fan cavity. The air exhaust and liquid guide connector extends into the cavity of the shell to be connected with an air outlet of the fan cavity in a sealed mode, a connecting groove is formed in the outer wall face of the air outlet end of the air exhaust and liquid guide connector, a liquid guide hole communicated with the interior of the air exhaust and liquid guide connector is formed in the connecting groove, and oil in the air exhaust and liquid guide connector flows into the fan cavity along the inner wall face of the air exhaust and liquid guide connector. The utility model aims to solve the problem that oil dirt is accumulated inside due to the fact that oil liquid cannot be smoothly discharged by the existing air draft equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation equipment, in particular to an exhaust device and a range hood having the same. Background Art

[0002] The range hood is an appliance designed for home kitchens to remove the fumes produced during cooking. The working principle of the range hood mainly includes three steps: fume suction, fume separation, and residual gas discharge. When the range hood is powered on, the motor rotates at high speed, driving the impeller to rotate at high speed at the same time, forming a vortex negative pressure area, and sucking the fume gas into the body. After passing through the filter and the centrifugal force, the fume is separated and finally discharged through the check valve and the exhaust pipe.

[0003] At present, the exhaust equipment (such as ventilator) that assists the range hood in exhausting oil fumes is installed above or on the side of the range hood and is located in the cabinet or the kitchen ceiling. During the long-term use of the existing exhaust equipment, the air outlet of the exhaust equipment is affected by the external environment, and the oil fumes in the exhaust equipment are easily condensed to form oil. The existing exhaust equipment cannot discharge the oil smoothly, and oil will accumulate inside the exhaust device, which is inconvenient for users to clean. The oil will then affect the normal operation of the ventilator, shortening the service life of the ventilator. Utility Model Content

[0004] The utility model provides an exhaust device and a range hood having the same, so as to solve the problem that during long-term use of the existing exhaust equipment, the exhaust equipment cannot smoothly discharge the condensed oil, resulting in the accumulation of oil stains inside the exhaust equipment.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an exhaust device for a range hood, comprising:

[0006] A housing having a cavity, wherein an air inlet is provided on one wall surface of the cavity;

[0007] A fan assembly, comprising a panel, a motor and a turbine, wherein the two sides of the panel in the width direction are respectively connected to two walls of the housing arranged opposite to each other, the panel and the two walls of the housing arranged opposite to each other, the parts defined by the panel constitute a fan cavity with an air outlet, the turbine is arranged in the fan cavity, the motor is fixed to the fan cavity and connected to the turbine, and is used to drive the turbine to rotate, and the air inlet is communicated with the fan cavity;

[0008] An exhaust liquid guiding joint, whose air inlet end extends into the cavity of the shell and is sealedly connected to the air outlet of the fan cavity, whose main body extends out of the shell through the wall of the shell, and whose air outlet end is provided with a connecting groove on the outer wall, and a liquid guiding hole connected to the interior of the exhaust liquid guiding joint is provided in the connecting groove, and the oil in the exhaust liquid guiding joint flows into the fan cavity along the inner wall of the exhaust liquid guiding joint.

[0009] According to one embodiment of the utility model, the air inlet is arranged on the bottom plate of the cavity, the upper edge and the lower edge of the enclosure are sealed with the top plate and the bottom plate of the shell respectively, and the line passing through the air inlet in the vertical direction coincides with the axis of the motor.

[0010] According to an embodiment of the utility model, a liquid guiding portion is extended downward from the edge of the air inlet, and the oil in the fan cavity flows out of the fan cavity along the liquid guiding portion.

[0011] According to one embodiment of the utility model, a drainage groove is provided on the inner wall surface below the exhaust and liquid guiding joint, one end of the drainage groove extends to the bottom of the connecting groove, and the other end extends to the air inlet end of the exhaust and liquid guiding joint, and the bottom of the connecting groove and the part aligned with the drainage groove are provided with the liquid guiding hole, the drainage groove is inclined, and the height of one end close to the liquid guiding hole is higher than the height close to the air inlet end of the exhaust and liquid guiding joint.

[0012] According to one embodiment of the utility model, an air inlet joint is connected to the lower surface of the bottom plate of the shell, an air inlet joint is provided with an air inlet channel, the air inlet channel is connected with the fan cavity, a liquid guide groove is provided on the upper surface of the air inlet joint, the downward projection of the air inlet falls into the liquid guide groove, and the liquid guide groove is connected with the air inlet channel.

[0013] According to one embodiment of the present utility model, the upper edge of the inner ring wall of the liquid guide groove extends upward to form an air guide portion, and the inner wall surface of the air guide portion is an arc surface convex inward, so that the space surrounded by the air guide portion forms a channel with an inner diameter gradually decreasing from bottom to top, and the outer wall surface of the air guide portion is an arc surface concave downward, so that the outer diameter of the air guide portion gradually decreases from bottom to top.

[0014] According to an embodiment of the present utility model, the upward projection of the air outlet of the air guide portion falls into the air inlet of the turbine.

[0015] According to one embodiment of the utility model, a transition portion is provided between the upper edge of the air inlet channel and the lower edge of the air guide portion, and the inner diameter of the transition portion gradually increases from bottom to top, so that the inner wall surface of the transition portion is an arc surface concave outward, the lower end of the inner wall surface of the transition portion is connected and tangent to the upper end of the air inlet channel, and the upper end of the inner wall surface of the transition portion is connected and tangent to the lower end of the inner wall surface of the air guide portion.

[0016] According to an embodiment of the utility model, a drainage hole is provided on the transition portion, and the oil in the liquid guiding groove enters the air inlet channel through the drainage hole.

[0017] The utility model also provides a range hood, which adopts the exhaust device described in any of the above items, including a connecting pipe and an air collecting box assembly, the air collecting box assembly has an air intake port and an air exhaust port, one end of the connecting pipe is connected to the air exhaust port, and the other end is connected to the air inlet.

[0018] Compared with the prior art, the exhaust device and the range hood having the same of the utility model have the following advantages:

[0019] The utility model provides an exhaust device, which is provided with a shell body with a cavity, a fan assembly, and an exhaust liquid guiding joint. When a user uses the exhaust device, a motor drives a turbine to rotate, and the turbine exhausts air outward, so that oil smoke enters the fan cavity through the air inlet, and the oil smoke then enters the air inlet end of the exhaust liquid guiding joint through the air outlet of the fan cavity. Oil liquid formed after the oil smoke in the exhaust liquid guiding joint is condensed drips into the connecting groove, and the oil liquid in the connecting groove flows through the liquid guiding hole and then flows into the fan cavity along the inner wall surface of the exhaust liquid guiding joint, so that the oil liquid inside the exhaust device can be discharged in time, and the accumulation of oil dirt inside the exhaust device is avoided, thereby improving the service life of the exhaust device.

[0020] The utility model provides a range hood, through the arrangement of a connecting pipe, an air collecting box assembly and an exhaust device, when the user uses the range hood, the exhaust device is started, the motor drives the turbine to rotate, the turbine exhausts air outward, the oil smoke in the kitchen enters the air collecting box assembly through the air suction port, the oil smoke enters the connecting pipe from the air outlet of the air collecting box assembly, the oil smoke in the connecting pipe enters the air inlet channel, the oil smoke in the air inlet channel passes through the air guide part and enters the fan cavity through the air inlet, and the oil smoke enters the exhaust guide through the air outlet of the fan cavity At the air inlet end of the liquid joint, the oil formed after the oil smoke in the exhaust liquid guiding joint is condensed drops into the connecting groove. After the oil in the connecting groove flows through the liquid guiding hole, it flows into the fan cavity along the inner wall surface of the exhaust liquid guiding joint, and then flows into the liquid guiding groove. The oil in the liquid guiding groove then flows to the inner wall of the air inlet channel, thereby not only guiding the oil, but also reducing the influence of the oil smoke on the oil discharge, so that the oil inside the exhaust device can be discharged in time, avoiding the accumulation of oil stains inside the exhaust device, thereby improving the normal life of the exhaust equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation of the utility model, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0022] Figure 1 The utility model is a schematic diagram of the overall structure of an exhaust device.

[0023] Figure 2 The utility model is a structural explosion diagram of an exhaust device.

[0024] Figure 3 The utility model is a cross-sectional schematic diagram of an exhaust device.

[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0026] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0027] Figure 6 The utility model is a schematic diagram of the overall structure of an exhaust and liquid guiding joint in an exhaust device.

[0028] Figure 7 The utility model is a top sectional view of an exhaust and liquid guiding joint in an exhaust device.

[0029] Figure 8 The utility model is a schematic diagram of the overall structure of a range hood.

[0030] Reference numerals:

[0031] Shell 1, air inlet 11, liquid guide part 111, cavity a, fan cavity b, fan assembly 2, enclosure 21, motor 22, turbine 23, exhaust liquid guide joint 3, connecting groove 31, liquid guide hole 32, drainage groove 33, air inlet joint 4, air inlet channel 41, liquid guide groove 42, air guide part 43, transition part 44, drainage hole 441, connecting pipe 5, air collecting box assembly 6, air suction port 61. DETAILED DESCRIPTION

[0032] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0036] Please also read Figures 1 to 7 The utility model provides an exhaust device for a range hood, comprising a housing 1, a fan assembly 2 and an exhaust and liquid guiding joint 3.

[0037] Please also read Figures 1 to 3 The housing 1 has a cavity a, and an air inlet 11 is provided on one of the walls of the cavity a; in this embodiment, the air inlet 11 is provided on the lower wall of the bottom of the cavity a. Through the air inlet 11, when the user uses the exhaust device, the oil smoke can enter the fan cavity b through the air inlet 11.

[0038] Among them, the fan assembly 2 includes a panel 21, a motor 22 and a turbine 23. The fan assembly 2 is installed in the cavity a; the two sides of the panel 21 in the width direction are respectively connected to the two walls of the shell 1 arranged opposite to each other, and the panel 21 and the two walls of the shell 1 arranged opposite to each other are defined by the panel 21 to form a fan cavity b with an air outlet, and the turbine 23 is arranged in the fan cavity b, and the motor 22 is fixed to the fan cavity b and connected to the turbine 23 to drive the turbine 23 to rotate, and the air inlet 11 is connected to the fan cavity b. When the user uses the utility model, the motor 22 drives the turbine 23 to rotate, and the turbine 23 exhausts air outward, and the oil smoke enters the fan cavity b through the air inlet 11, and the oil smoke is then discharged through the air outlet of the fan cavity b.

[0039] In this embodiment, the air inlet end of the exhaust liquid guiding joint 3 extends into the cavity a of the housing 1 and is sealedly connected with the air outlet of the fan cavity b. The body of the exhaust liquid guiding joint 3 extends through the wall of the housing 1 to the outside of the housing 1. A connecting groove 31 is provided on the outer wall of the air outlet end of the exhaust liquid guiding joint 3. A liquid guiding hole 32 communicating with the interior of the exhaust liquid guiding joint 3 is provided in the connecting groove 31. The oil in the exhaust liquid guiding joint 3 flows into the fan cavity b along the inner wall of the exhaust liquid guiding joint 3. In this way, the oil smoke enters the air inlet end of the exhaust liquid guiding joint 3 through the air outlet of the fan cavity b. The oil formed by the condensation of the oil smoke in the exhaust liquid guiding joint 3 drips into the connecting groove 31. The oil in the connecting groove 31 flows through the liquid guiding hole 32 and then flows into the fan cavity b along the inner wall of the exhaust liquid guiding joint 3.

[0040] The utility model provides an exhaust device. When the user uses it, after the motor 22 is started, the motor 22 drives the turbine 23 to rotate, and the turbine 23 exhausts air outward, so that the oil smoke enters the fan chamber b through the air inlet 11, and the oil smoke enters the air inlet end of the exhaust liquid guiding joint 3 through the air outlet of the fan chamber b. The oil liquid formed by the condensation of the oil smoke in the exhaust liquid guiding joint 3 drips into the connecting groove 31. The oil liquid in the connecting groove 31 flows through the liquid guiding hole 32 and then flows into the fan chamber b along the inner wall surface of the exhaust liquid guiding joint 3, so that the oil liquid inside the exhaust device can be discharged in time, avoiding the accumulation of oil stains inside the exhaust device.

[0041] Based on the above examples, please refer to Figure 2 , Figure 3 and Figure 5 In other embodiments, the air inlet 11 is arranged on the bottom plate of the cavity a, and the upper and lower edges of the enclosure 21 are sealed and connected to the top plate and the bottom plate of the housing 1, respectively, so as to achieve better installation of the motor 22 and the turbine 23 on the housing 1, increase the space of the fan chamber b, and the fan chamber b can store more oil, and can also prevent the oil from flowing to the top plate and the bottom plate of the housing 1. At the same time, the line passing through the air inlet 11 in the vertical direction coincides with the axis of the motor 22. By arranging the air inlet 11 on the bottom plate of the cavity a and arranging the direction line passing through the air inlet 11 in the vertical direction coincident with the axis of the motor 22, when the user uses the exhaust device, the oil can be affected by its gravity and drip into the air inlet 11 for collection, so as to prevent the oil from gathering in the cavity a.

[0042] Based on the above examples, please refer to Figure 2 and Figure 4In other embodiments, a liquid guide portion 111 extends downward from the edge of the air inlet 11, and the oil in the fan cavity b flows out of the fan cavity b along the liquid guide portion 111. Through the provision of the liquid guide portion 111, when the user uses the utility model, the oil in the connection groove 31 flows through the liquid guide hole 32 and then flows into the fan cavity b along the inner wall surface of the exhaust liquid guide joint 3, and the oil in the fan cavity b flows out of the fan cavity b along the liquid guide portion 111. The oil is guided by the liquid guide portion 111 so that the oil can drip into the air inlet 11 better, and then the user can collect it, so that the oil can be discharged from the inside of the exhaust device in time, and the oil will not gather in the cavity a.

[0043] Based on the above examples, please refer to Figure 3 and Figure 5 In other embodiments, a drainage groove 33 is provided on the inner wall surface of the exhaust and liquid guiding joint 3 at the bottom, one end of the drainage groove 33 extends to the bottom of the connecting groove 31, and the other end extends to the air inlet end of the exhaust and liquid guiding joint 3, and a liquid guiding hole 32 is provided at the bottom of the connecting groove 31 and the part aligned with the drainage groove 33. The drainage groove 33 is inclined, and the height of one end close to the liquid guiding hole 32 is higher than the height close to the air inlet end of the exhaust and liquid guiding joint 3. When the user uses the exhaust device, the oil liquid formed by the condensation of the oil smoke in the exhaust liquid guiding joint 3 drips into the connecting groove 31, and the oil liquid in the connecting groove 31 flows to the drainage groove 33 through the liquid guiding hole 32. The inclined drainage groove 33 guides the oil liquid to the air inlet end of the exhaust liquid guiding joint 3, thereby introducing the oil liquid into the fan cavity b. The oil liquid in the fan cavity b flows out of the fan cavity b along the liquid guiding part 111, and is guided by the drainage groove 33. Under ventilation conditions, the oil liquid can better drip into the air inlet 11, so that the user can collect it conveniently.

[0044] Based on the above examples, please refer to Figure 1 , Figure 2 and Figure 4 In other embodiments, the lower surface of the bottom plate of the housing 1 is connected with an air inlet joint 4, and an air inlet channel 41 is provided on the air inlet joint 4, and the air inlet channel 41 is communicated with the fan chamber b, and a liquid guide groove 42 is provided on the upper surface of the air inlet joint 4, and the downward projection of the air inlet 11 falls into the liquid guide groove 42, and the liquid guide groove 42 is communicated with the air inlet channel 41. Through the setting of the air inlet joint 4, when the user uses the exhaust device, the oil in the fan chamber b flows out of the fan chamber b along the liquid guide portion 111, and then flows into the liquid guide groove 42, and the oil in the liquid guide groove 42 flows to the inner wall of the air inlet channel 41, so that the oil smoke sucked by the turbine 23 enters the fan chamber b along the axial direction of the air inlet channel 41. At the same time, when the oil smoke is relatively strong, the oil flows out through the inner wall of the air inlet channel 41, avoiding the accumulation of oil stains inside the exhaust device and reducing the influence of the oil smoke on the discharge of the oil.

[0045] Based on the above examples, please refer to Figure 4 In other embodiments, the upper edge of the inner ring wall of the liquid guide groove 42 extends upward to form an air guide portion 43, and the inner wall surface of the air guide portion 43 is an inwardly convex arc surface, so that the space surrounded by the air guide portion 43 forms a channel with a gradually decreasing inner diameter from bottom to top, and the outer wall surface of the air guide portion 43 is a downwardly concave arc surface, so that the outer diameter of the air guide portion 43 gradually decreases from bottom to top. By setting the air guide portion 43 with an inwardly convex arc surface, when the user uses the exhaust device, the oil fume air inlet channel 41 forms a channel with a gradually decreasing inner diameter from bottom to top, and the channel becomes narrower, which not only guides the oil fume and allows it to better enter the fan chamber b, so that the exhaust device can discharge the oil smoothly; but also increases the flow speed of the oil fume in the channel, so that the oil fume in the kitchen is more strongly absorbed.

[0046] Based on the above examples, please refer to Figures 2 to 4 In other embodiments, the upward projection of the air outlet of the air guide portion 43 falls into the air inlet 11 of the turbine 23. When the user uses the exhaust device, the oil smoke sucked by the turbine 23 enters the fan chamber b along the axial direction of the air outlet of the air guide portion 43, so that the oil smoke can flow into the fan chamber b more smoothly. At the same time, when the user stops using the range hood, the oil can also flow out through the inner wall of the air inlet channel 41. After the oil in the fan chamber b flows out of the fan chamber b along the liquid guide portion 111, the oil flows into the liquid guide groove 42. The oil in the liquid guide groove 42 then flows to the inner wall of the air inlet channel 41, thereby guiding the oil. The oil can also better enter the fan chamber b, and then the oil can be better discharged from the exhaust device.

[0047] Based on the above examples, please refer to Figures 2 to 4 In other embodiments, a transition portion 44 is provided between the upper edge of the air inlet channel 41 and the lower edge of the air guide portion 43, and the inner diameter of the transition portion 44 gradually increases from bottom to top, so that the inner wall surface of the transition portion 44 is an outwardly concave arc surface, and the lower end of the inner wall surface of the transition portion 44 is connected and tangent to the upper end of the air inlet channel 41, and the upper end of the inner wall surface of the transition portion 44 is connected and tangent to the lower end of the inner wall surface of the air guide portion 43. By setting the transition portion 44 with an outwardly concave arc surface as the inner wall surface, when the user uses the exhaust device, the oil fume air inlet channel 41 forms a channel with a gradually decreasing inner diameter from bottom to top, and the channel becomes narrower, which not only guides the oil liquid so that the oil liquid can better enter the fan chamber b and then discharge the oil liquid smoothly, but also increases the flow speed of the oil fume in the channel, so that the oil fume in the kitchen is more strongly absorbed.

[0048] Based on the above examples, please refer to Figures 2 to 4In other embodiments, a drainage hole 441 is provided on the transition portion 44, and the oil in the liquid guide groove 42 enters the air inlet channel 41 through the drainage hole 441. Through the setting of the drainage hole 441, when the user uses the exhaust device, the oil in the fan chamber b flows out of the fan chamber b along the liquid guide portion 111, and then flows into the liquid guide groove 42. The oil in the liquid guide groove 42 enters the air inlet channel 41 through the drainage hole 441. The flow speed of the oil fume in the channel is increased by the transition portion 44, so that the oil fume in the kitchen is more strongly absorbed. The oil is guided by the drainage hole 441, so that the exhaust device cannot discharge the oil smoothly; at the same time, the oil fume sucked by the turbine 23 enters the fan chamber b along the axial direction of the air inlet channel 41, reducing the influence of the oil fume on the discharge of the oil.

[0049] Based on any of the above exhaust devices, in order to better collect the oil in the exhaust device, please refer to Figures 1 to 8 The utility model also provides a range hood, comprising a connecting pipe 5, an air collecting box assembly 6 and any of the above exhaust devices. Figure 8 The air collecting box assembly 6 has an air intake port 61 and an air exhaust port. One end of the connecting pipe 5 is connected to the air exhaust port, and the other end is connected to the air inlet 11. Through the arrangement of the connecting pipe 5, the air collecting box assembly 6 and the exhaust device, when the user uses the range hood, the exhaust device is started, the motor 22 drives the turbine 23 to rotate, and the turbine 23 exhausts air outwardly. The oil smoke in the kitchen enters the air collecting box assembly 6 through the air intake port 61, and the oil smoke enters the connecting pipe 5 from the air exhaust port of the air collecting box assembly 6. The oil smoke in the connecting pipe 5 enters the air inlet channel 41. The oil smoke in the air inlet channel 41 passes through the air guide portion 43 and the air inlet 11 into the fan chamber b. The oil smoke then enters the air inlet end of the exhaust liquid guide joint 3 through the air outlet of the fan chamber b. The oil liquid formed by the condensation of the oil smoke in the exhaust liquid guide joint 3 drips into the connecting groove 31. The oil liquid in the connecting groove 31 flows through the liquid guide hole 32 and then flows along the exhaust pipe 31. After the inner wall surface of the wind-liquid guide joint 3 flows into the fan chamber b, the oil flows into the liquid guide groove 42, and the oil in the liquid guide groove 42 flows to the inner wall of the air inlet channel 41, thereby not only guiding the oil, but also reducing the influence of oil smoke on the oil discharge, so that the oil inside the exhaust device can be discharged in time, avoiding the accumulation of oil stains inside the exhaust device, thereby improving the normal life of the exhaust equipment, and the oil fume air inlet channel 41 forms a channel with an inner diameter that gradually decreases from bottom to top. The narrowing of the channel increases the flow speed of the oil fume in the air inlet channel 41, making the air intake speed at the air intake port 61 faster, and the negative pressure formed near the air intake port 61 is larger, so that the suction force of the range hood is greater, and the oil fume in the kitchen is more strongly absorbed.

[0050] 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. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. An exhaust device for a range hood, characterized in that: include: A housing (1) having a cavity (a), wherein an air inlet (11) is provided on one of the walls of the cavity (a); A fan assembly (2), comprising a panel (21), a motor (22) and a turbine (23), wherein the two sides of the panel (21) in the width direction are respectively connected to two wall surfaces of the housing (1) arranged opposite to each other, the panel (21) and the two wall surfaces of the housing (1) arranged opposite to each other, the parts of which are defined by the panel (21) constitute a fan chamber (b) having an air outlet, the turbine (23) is arranged in the fan chamber (b), the motor (22) is fixed to the fan chamber (b) and connected to the turbine (23) to drive the turbine (23) to rotate, and the air inlet (11) is communicated with the fan chamber (b); An exhaust liquid guiding joint (3) has an air inlet end extending into the cavity of the shell (1) and sealedly connected to the air outlet of the fan cavity (b); a main body of the exhaust liquid guiding joint (3) extends through the wall of the shell (1) to the outside of the shell (1); a connecting groove (31) is provided on the outer wall of the exhaust liquid guiding joint (3); a liquid guiding hole (32) connected to the interior of the exhaust liquid guiding joint (3) is provided in the connecting groove (31); and oil in the exhaust liquid guiding joint (3) flows into the fan cavity (b) along the inner wall of the exhaust liquid guiding joint (3).

2. The exhaust device according to claim 1, characterized in that: The air inlet (11) is arranged on the bottom plate of the cavity (a), the upper edge and the lower edge of the enclosure (21) are sealed to the top plate and the bottom plate of the shell (1) respectively, and the line passing through the air inlet (11) in the vertical direction coincides with the axis of the motor (22).

3. The exhaust device according to claim 2, characterized in that: A liquid guide portion (111) extends downward from the edge of the air inlet (11), and the oil in the fan cavity (b) flows out of the fan cavity (b) along the liquid guide portion (111).

4. The exhaust device according to claim 2, characterized in that: A drainage groove (33) is provided on the inner wall surface of the exhaust and liquid guiding joint (3) located below, one end of the drainage groove (33) extends to the bottom of the connecting groove (31), and the other end extends to the air inlet end of the exhaust and liquid guiding joint (3), the bottom of the connecting groove (31) and the portion aligned with the drainage groove (33) are provided with the liquid guiding hole (32), the drainage groove (33) is arranged obliquely, and the height of one end close to the liquid guiding hole (32) is higher than the height close to the air inlet end of the exhaust and liquid guiding joint (3).

5. The exhaust device according to claim 2, characterized in that: The lower surface of the bottom plate of the shell (1) is connected to an air inlet joint (4), an air inlet channel (41) is provided on the air inlet joint (4), the air inlet channel (41) is communicated with the fan chamber (b), the upper surface of the air inlet joint (4) is provided with a liquid guide groove (42), the downward projection of the air inlet (11) falls into the liquid guide groove (42), and the liquid guide groove (42) is communicated with the air inlet channel (41).

6. The exhaust device according to claim 5, characterized in that: The upper edge of the inner ring wall of the liquid guiding groove (42) extends upward to form an air guiding portion (43); the inner wall surface of the air guiding portion (43) is an inwardly convex arc surface, so that the space surrounded by the air guiding portion (43) forms a channel with an inner diameter gradually decreasing from bottom to top; the outer wall surface of the air guiding portion (43) is a downwardly concave arc surface, so that the outer diameter of the air guiding portion (43) gradually decreases from bottom to top.

7. The exhaust device according to claim 6, characterized in that: The upward projection of the air outlet of the air guide portion (43) falls into the air inlet of the turbine (23).

8. The exhaust device according to claim 6, characterized in that: A transition portion (44) is provided between the upper edge of the air inlet channel (41) and the lower edge of the air guide portion (43); the inner diameter of the transition portion (44) gradually increases from bottom to top, so that the inner wall surface of the transition portion (44) is an arc surface that is concave outward; the lower end of the inner wall surface of the transition portion (44) is connected to and tangent to the upper end of the air inlet channel (41); and the upper end of the inner wall surface of the transition portion (44) is connected to and tangent to the lower end of the inner wall surface of the air guide portion (43).

9. The exhaust device according to claim 8, characterized in that: The transition portion (44) is provided with a drainage hole (441), and the oil in the liquid guide groove (42) enters the air inlet channel (41) through the drainage hole (441).

10. A range hood, using the exhaust device according to any one of claims 1 to 9, characterized in that: It comprises a connecting pipe (5) and an air collecting box assembly (6), wherein the air collecting box assembly (6) has an air suction port (61) and an air exhaust port, and one end of the connecting pipe (5) is connected to the air exhaust port, and the other end is connected to the air inlet (11).

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