Ventilation device

Abstract

The utility model relates to the technical field of ventilation equipment, in particular to a ventilation device. Comprising an air collecting assembly, an air draft assembly and a connecting pipe. The air collecting assembly is provided with an air suction opening and an air outlet, and the air outlet is connected with an air outlet connector used for guiding oil. The air draft assembly is provided with an air inlet and an air outlet, and the air inlet is connected with an air inlet connector used for guiding oil. The air inlet end of the connecting pipe is connected with the air outlet connector, and the air outlet end of the connecting pipe is connected with the air inlet connector. The air inlet end of the connecting pipe is connected into the air outlet connector in a sleeved mode, and the lower end of the air inlet connector is connected into the connecting pipe in a sleeved mode. The utility model aims to solve the problem that oil is easy to gather in the ventilation device due to the fact that the existing ventilation device cannot smoothly discharge backflow oil.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation equipment, in particular to a ventilation device. Background Art

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. The main function of a range hood is to quickly extract and discharge the waste from stove combustion and the harmful fumes produced during cooking to the outside, while collecting the oil liquid after the condensation of the fumes. The working principle of the range hood mainly includes three steps: fumes suction, fumes 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 fumes into the body.

[0003] At present, the range hood mainly includes an air collecting device, an exhaust device, a control system and an oil fume collection system. The air outlet joint of the existing air collecting device is difficult to guide the oil liquid flowing down in the air duct. When the user uses the range hood for a long time, the oil liquid in the air duct is difficult to flow downward smoothly, causing the oil liquid to gather in the air duct. At the same time, the exhaust device that assists the range hood in exhausting oil fume is installed above or on the side of the range hood and is located in the cabinet or kitchen ceiling. During the long-term use of the existing exhaust device, the air outlet of the exhaust device is affected by the external environment, and the oil fume in the exhaust device is easy to condense to form oil liquid, so that the existing ventilation device cannot smoothly discharge the oil liquid, and oil stains will also accumulate inside the ventilation device. As a result, the existing range hood cannot smoothly discharge the refluxed oil liquid, and the interior of the range hood is prone to oil collection. The oil stains generated after the oil collection are very likely to block the channel for discharging oil smoke inside the range hood, shortening the service life of the range hood. Utility Model Content

[0004] The utility model provides a ventilation device to solve the problem that the existing ventilation device cannot smoothly discharge the refluxed oil, resulting in the easy collection of oil inside the ventilation device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a ventilation device, comprising:

[0006] An air collecting component, which has an air inlet and an air outlet, wherein the air outlet is connected to an air outlet connector for guiding oil;

[0007] An air exhaust component, which has an air inlet and an air outlet, wherein the air inlet is connected to an air inlet joint for guiding oil;

[0008] A connecting pipe, the air inlet end of which is connected to the air outlet joint, and the air outlet end of which is connected to the air inlet joint;

[0009] Wherein, the air inlet end of the connecting pipe is sleeved in the air outlet joint, and the lower end of the air inlet joint is sleeved in the connecting pipe.

[0010] According to one embodiment of the utility model, an air outlet channel extends upward from the upper surface of the air outlet joint, and the air outlet channel is connected to the interior of the air collecting component. The upper surface of the air outlet joint is provided with a first connecting groove surrounding the air outlet channel, and the first connecting groove is connected to the air outlet channel. The air inlet end of the connecting pipe is connected to the first connecting groove, and the air outlet channel is sleeved in the connecting pipe.

[0011] According to one embodiment of the utility model, the air suction port is a narrow and long air suction port arranged along the width direction of the air collecting component, and its size along the front-to-back direction is smaller than the size of the air outlet of the air collecting component along the front-to-back direction, and its size along the left-to-right direction is larger than the size of the air outlet of the air collecting component along the left-to-right direction. The downward projection of the air outlet of the air collecting component covers part of the air suction port, and an oil guide structure is provided on the air outlet joint, and the oil guide structure is used to guide oil from one side of the air suction port to the other side of the air suction port along the front-to-back direction.

[0012] According to one embodiment of the utility model, the oil guiding structure includes an oil guiding groove arranged on the inner wall of the air outlet channel, the oil guiding groove has an oil outlet, the inner wall of the air outlet channel and the part aligned with the oil outlet form a first oil guiding surface, the downward projection of the first oil guiding surface falls on the outside of the air suction port, the first connecting groove is connected with the oil circuit of the oil guiding groove, the oil in the first connecting groove and the oil guiding groove flows out through the oil outlet and flows into the inner cavity of the air collecting component along the first oil guiding surface.

[0013] According to one embodiment of the utility model, the oil guiding structure also includes an oil guiding section arranged at the lower edge of the air outlet channel, the oil guiding section spans the air suction port in the front-to-back direction, and extends from one side of the air suction port to the other side of the air suction port, the bottom surface of the oil guiding section forms a second oil guiding surface, and the second oil guiding surface is inclined from top to bottom from one side of the air suction port to the other side of the air suction port.

[0014] According to one embodiment of the utility model, the air collecting assembly includes a shell and an inner bellows, the inner bellows is arranged in the shell, and the air intake and air outlet are connected to the inner bellows; the top plate of the inner bellows located on both sides of the air outlet is inclined from an end close to the air intake to an end away from the air intake, and the downward projection of the inclined portion of the top plate of the inner bellows covers the air intake, and the inner wall surface of the inclined portion of the top plate of the inner bellows forms a third oil guide surface.

[0015] According to one embodiment of the utility model, an air inlet channel extends downward from the lower surface of the air inlet joint, and the air inlet channel is connected to the interior of the exhaust assembly. The lower surface of the air inlet joint is provided with a second connecting groove surrounding the air inlet channel, the air outlet end of the connecting pipe is connected to the second connecting groove, and the air inlet channel is sleeved in the connecting pipe.

[0016] According to one embodiment of the utility model, a liquid guide groove is provided on the upper surface of the air inlet joint, the downward projection of the air inlet of the exhaust assembly falls into the liquid guide groove, and the liquid guide groove is connected to the air inlet channel.

[0017] According to an embodiment of the utility model, a liquid guiding portion extends downward from the edge of the air inlet, and the liquid guiding portion extends into the liquid guiding groove.

[0018] According to one embodiment of the utility model, the exhaust assembly includes a bellows and a centrifugal fan, the centrifugal fan is arranged in the bellows, the air inlet is connected to the interior of the volute of the centrifugal fan, and the oil in the centrifugal fan enters the liquid guide groove through the air inlet.

[0019] Compared with the prior art, the ventilation device of the utility model has at least the following advantages:

[0020] The utility model discloses a ventilation device, through the arrangement of an air collecting component, an exhaust component and a connecting pipe, when the user uses the ventilation device, he starts the exhaust component, the exhaust component generates airflow inside the ventilation device, and then causes negative pressure to be generated at the air suction port, the oil smoke enters the air collecting component from the air suction port, the oil smoke in the air collecting component enters the connecting pipe from the air outlet through the air outlet joint, the oil smoke in the connecting pipe enters the exhaust component through the air outlet end and the air inlet joint, and then is discharged through the exhaust component. The oil smoke in the exhaust component that is about to be discharged to the outside is affected by the external air, and the condensed oil flows back into the exhaust component, and the oil in the exhaust component flows back to the air inlet, and the oil at the air inlet is guided by the air inlet joint so that the oil can flow smoothly into the connecting pipe, and the oil in the connecting pipe flows back to the air outlet joint, and the oil is guided by the air outlet joint so that the oil is smoothly introduced into the air collecting component, thereby avoiding the accumulation of oil in the exhaust component and the connecting pipe, avoiding the influence of oil pollution on the ventilation device, and increasing the service life of the ventilation device. 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 1The utility model is a schematic diagram of the overall structure of a ventilation device.

[0023] Figure 2 This is another overall structural schematic diagram of a ventilation device of the utility model.

[0024] Figure 3 The utility model is a schematic diagram of the structure of an air collecting component and an air outlet joint after being assembled in a ventilation device.

[0025] Figure 4 The utility model is an exploded view of an air collecting component and an air outlet joint in a ventilation device.

[0026] Figure 5 The utility model is a schematic diagram of the overall structure of an air outlet joint in a ventilation device.

[0027] Figure 6 The utility model is a cross-sectional view of an air outlet joint in a ventilation device.

[0028] Figure 7 The utility model is a schematic diagram of the overall structure of an exhaust component and an air inlet joint in a ventilation device after being assembled.

[0029] Figure 8 The utility model is an exploded view of an exhaust assembly and an air inlet joint in a ventilation device.

[0030] Fig. 9 It is a cross-sectional view of an air exhaust component and an air inlet joint in a ventilation device of the utility model after assembly.

[0031] Fig.10 for Fig. 9 Enlarged view of point B in the middle.

[0032] Fig.11 for Fig. 9 Enlarged view of point A in the middle.

[0033] Fig.12 It is a cross-sectional view of the right side of an air collecting component and an air outlet joint in a ventilation device of the utility model.

[0034] Fig.13 for Fig.12 Enlarged view of point C in the middle.

[0035] Fig.14 It is a cross-sectional view of the front side of an air collecting component and an air outlet joint in a ventilation device of the utility model.

[0036] Fig.15 for Fig.14 Enlarged view of point D in the middle.

[0037] Reference numerals:

[0038] Air collecting component 1, air suction port 11, shell 12, inner bellows 13, third oil guide surface 131, air outlet joint 2, air outlet channel 21, first oil guide surface 211, oil guide section 212, second oil guide surface 2121, first connecting groove 22, oil guide groove 23, oil outlet 231, air exhaust component 3, air inlet 31, liquid guide part 311, exhaust groove 312, liquid guide hole 313, drainage groove 314, bellows 32, centrifugal fan 33, air inlet joint 4, air inlet channel 41, second connecting groove 42, liquid guide groove 43, connecting pipe 5. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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:

[0043] See also Figures 1 to 15 The utility model provides a ventilation device, including an air collecting component 1, an air exhaust component 3 and a connecting pipe 5.

[0044] Please also refer to Figure 1 , Figure 4 and Figure 8 The air collection component 1 has an air suction port 11 and an air outlet; the air collection component 1 can suck in the oil smoke on the stove through the air suction port 11. The air outlet of the air collection component 1 is connected to an air outlet connector 2 for guiding oil, and the oil smoke sucked in by the air suction port 11 enters the air outlet connector 2 through the air outlet.

[0045] In this embodiment, the exhaust assembly 3 has an air inlet 31 and an air outlet, and the air inlet 31 is connected to an air inlet connector 4 for guiding oil. After the exhaust assembly 3 is started, it drives the air flow in the channel connected to the exhaust assembly 3, the air collecting assembly 1 and the connecting pipe 5, so that the air suction port 11 generates negative pressure, so that the oil smoke enters the exhaust assembly 3 from the air inlet 31, and the oil smoke is discharged from the air outlet of the exhaust assembly 3 with the flow of air flow. At the same time, the oil smoke that is about to be discharged to the outside is affected by the external air, and the condensed oil flows back into the exhaust assembly 3, and the oil in the exhaust assembly 3 flows back to the air inlet 31. The oil at the air inlet 31 is guided by the air inlet connector 4 to prevent the oil from gathering in the exhaust assembly 3.

[0046] Specifically, the air inlet end of the connecting pipe 5 is connected to the air outlet joint 2, and the air outlet end of the connecting pipe 5 is connected to the air inlet joint 4. The oil flowing into the connecting pipe 5 from the air outlet joint 2 flows back to the air outlet joint 2, and the air outlet joint 2 guides the oil to prevent the oil from gathering in the connecting pipe 5.

[0047] The air inlet end of the connecting pipe 5 is sleeved in the air outlet joint 2, and the lower end of the air inlet joint 4 is sleeved in the connecting pipe 5. In this embodiment, an oil cup is also provided at the bottom of the air collecting component 1, and the oil cup is connected below the oil drain hole of the air collecting component 1. The oil cup is used to collect the oil flowing out of the air collecting component 1. In this way, the oil flowing out of the air collecting component 1 is collected to prevent the oil flowing out of the air collecting component 1 from dripping on the stove.

[0048] The utility model discloses a ventilation device. When the user uses the ventilation device, the exhaust component 3 is started. The exhaust component 3 generates airflow inside the ventilation device, and negative pressure is generated at the air inlet 11. The oil smoke enters the air collecting component 1 from the air inlet 11. The oil smoke in the air collecting component 1 enters the connecting pipe 5 through the air outlet joint 2 from the air outlet. The oil smoke in the connecting pipe 5 enters the exhaust component 3 through the air outlet end and the air inlet joint 4, and then the oil smoke is discharged through the exhaust component 3. The oil smoke that is about to be discharged to the outside is Affected by the external air, the condensed oil flows back to the exhaust component 3, and the oil in the exhaust component 3 flows back to the air inlet 31. The oil at the air inlet 31 is guided by the air inlet joint 4, so that the oil can flow smoothly into the connecting pipe 5. The oil in the connecting pipe 5 flows back to the air outlet joint 2, and the oil is guided by the air outlet joint 2, so that the oil is smoothly introduced into the air collecting component 1, so as to avoid the oil from gathering in the exhaust component 3 and the connecting pipe 5, thereby avoiding the influence of oil pollution on the ventilation device.

[0049] Based on the above examples, please refer to Figure 4 , Figure 5 , Figure 6 , Fig.14 and Fig.15 In other embodiments, an air outlet channel 21 is provided on the upper surface of the air outlet joint 2, the bottom end of the air outlet channel 21 is connected to the inside of the air collecting assembly 1, and after the air outlet channel 21 extends upward, the top end of the air outlet channel 21 is connected to the connecting pipe 5, and a first connecting groove 22 surrounding the air outlet channel 21 is provided on the upper surface of the air outlet joint 2, the first connecting groove 22 is connected to the air outlet channel 21, the air inlet end of the connecting pipe 5 is connected to the first connecting groove 22, and the air outlet channel 21 is sleeved in the connecting pipe 5. By providing the first connecting groove 22 on the air outlet joint 2, when installing the ventilation device, the user installs the air inlet end of the connecting pipe 5 in the first connecting groove 22, so that the air outlet channel 21 is located in the connecting pipe 5. When the user uses the ventilation device, the oil smoke enters the air collection component 1 from the air inlet 11, and the oil smoke in the air collection component 1 enters the connecting pipe 5 from the air outlet through the air outlet channel 21. The oil smoke in the connecting pipe 5 enters the exhaust component 3 through its air outlet end and the air inlet joint 4, and then the oil smoke is discharged through the exhaust component 3. At the same time, the oil smoke in the exhaust component 3 affected by the external air condenses to form oil, and the oil in the exhaust component 3 flows back to the air inlet 31. The oil at the air inlet 31 is guided by the air inlet joint 4 so that the oil can flow smoothly into the connecting pipe 5. The first connecting groove 22 receives the oil flowing down in the connecting pipe 5, and the oil in the first connecting groove 22 flows to the air outlet channel 21, thereby guiding the oil so that the oil is smoothly introduced into the air collection component 1, and the oil is prevented from gathering in the exhaust component 3 and the connecting pipe 5.

[0050] Based on the above examples, please refer to Figure 1 In other embodiments, the air inlet 11 is a narrow and long air inlet 11 arranged along the width direction of the air collecting component 1, and its dimension along the front-to-back direction is smaller than the dimension of the air outlet of the air collecting component 1 along the front-to-back direction, and its dimension along the left-to-right direction is larger than the dimension of the air outlet of the air collecting component 1 along the left-to-right direction, and the downward projection of the air outlet of the air collecting component 1 covers part of the air inlet 11, and an oil guide structure is provided on the air outlet joint 2, and the oil guide structure is used to guide the oil from one side of the air inlet 11 to the other side of the air inlet 11 along the front-to-back direction. The air inlet 11 is set as a narrow and long air inlet 11, and the dimension of the air inlet 11 along the front-to-back direction is smaller than the dimension of the air outlet of the air collecting component 1 along the front-to-back direction, and the dimension of the air inlet 11 along the left-to-right direction is larger than the dimension of the air outlet of the air collecting component 1 along the left-to-right direction, so that the range of the air inlet 11 to absorb oil smoke is increased, so that when there is a lot of oil smoke, the air inlet 11 can absorb more oil smoke. At the same time, the oil is guided from one side of the air suction port 11 to the other side of the air suction port 11 along the front-to-back direction through the oil guiding structure. When the user uses the ventilation device, the oil guiding structure guides the oil flowing down in the connecting pipe 5 from one side of the air suction port 11 to the other side of the air suction port 11, so that the oil entering the air collecting component 1 is concentrated on one side of the air collecting component 1, thereby guiding the oil, facilitating the collection of the oil entering the air collecting component 1, and also preventing the oil from flowing out of the air suction port 11, thereby preventing the oil from contaminating the stove.

[0051] Based on the above examples, please refer to Figure 5 and Figure 6 In other embodiments, the oil guiding structure includes an oil guiding groove 23 provided on the inner wall of the air outlet channel 21, the oil guiding groove 23 has an oil outlet 231, and the portion of the inner wall of the air outlet channel 21 aligned with the oil outlet 231 forms a first oil guiding surface 211, the downward projection of the first oil guiding surface 211 falls on the outside of the air intake port 11, the first connecting groove 22 is connected with the oil guiding groove 23 in oil circuit, and the oil in the first connecting groove 22 and the oil guiding groove 23 flows out through the oil outlet 231 and flows into the inner cavity of the air collecting component 1 along the first oil guiding surface 211. By setting the oil guide groove 23 with the oil outlet 231, the oil guide groove 23 increases the range of catching the oil flowing down from the connecting pipe 5. When the user uses the ventilation device, the oil guide groove 23 and the first connecting groove 22 respectively catch the oil flowing down from the connecting pipe 5, especially when a large amount of oil flows down from the connecting pipe 5, thereby preventing the oil flowing down from the connecting pipe 5 from directly dripping into the air collection component 1, thereby preventing the oil from flowing out of the air suction port 11 and preventing the oil from contaminating the stove. At the same time, the oil in the oil guide groove 23 and the oil in the first connecting groove 22 flow out through the oil outlet 231 and flow into the inner cavity of the air collection component 1 along the first oil guide surface 211, thereby guiding the oil, so that the oil entering the air collection component 1 can be better collected.

[0052] Based on the above examples, please refer to Figure 5 , Figure 6 , Fig.12 and Fig.13 In other embodiments, the oil guide structure further includes an oil guide section 212 disposed at the lower edge of the air outlet channel 21, the oil guide section 212 spans the air inlet 11 in the front-to-back direction, and extends from one side of the air inlet 11 to the other side of the air inlet 11, and the bottom surface of the oil guide section 212 forms a second oil guide surface 2121, and the second oil guide surface 2121 is inclined from top to bottom from one side of the air inlet 11 to the other side of the air inlet 11. Specifically, the oil guide section 212 is connected to the first oil guide surface 211, and the second oil guide surface 2121 is inclined from top to bottom and toward the first oil guide surface 211. By setting the oil guiding section 212 and the second oil guiding surface 2121, when the user uses the ventilation device, the oil in the connecting pipe 5 flows into the oil guiding groove 23 and the first connecting groove 22 and then is collected, and the oil flows out through the oil outlet 231 and then along the first oil guiding surface 211; at the same time, when the oil overflows the oil guiding groove 23 or the oil drips on the outer wall of the oil guiding groove 23, the oil flows along the outer wall of the oil guiding groove 23 to the oil guiding section 212, and the second oil guiding surface 2121 on the oil guiding section 212 guides the oil so that the oil flows toward the first oil guiding surface 211, thereby preventing the oil from dripping out from the air inlet 11.

[0053] Based on the above examples, please refer to Figure 3 , Figure 4 , Fig.14 and Fig.15In other embodiments, the air collecting assembly 1 includes a shell body 12 and an inner bellows 13, the inner bellows 13 is arranged in the shell body 12, and the air intake port 11 and the air outlet are connected to the inner bellows 13; the top plate of the inner bellows 13 is located on both sides of the air outlet and is inclined from an end close to the air intake port 11 to an end away from the air intake port 11, and the downward projection of the inclined portion of the top plate of the inner bellows 13 covers the air intake port 11, and the inner wall surface of the inclined portion of the top plate of the inner bellows 13 forms a third oil guide surface 131. Through the arrangement of the shell 12 and the inner bellows 13, the user installs the shell 12 on the wall above the gas stove or other places during installation, thereby fixing the air collecting device. When the user uses the air collecting device, the oil smoke is sucked into the inner bellows 13 from the air intake port 11, and the oil smoke in the inner bellows 13 is discharged to the air outlet channel 21 of the air outlet joint 2 through the air outlet, and the oil smoke in the air outlet channel 21 enters the connecting pipe 5 and then enters the exhaust component 3 and is then discharged, and the oil formed after the oil smoke in the exhaust component 3 is condensed flows back to the connecting pipe 5 through the guidance of the air inlet joint 4, and the oil guide groove 23 and the first connecting groove 22 respectively receive the oil flowing down in the connecting pipe 5, and the oil flows out through the oil outlet 231 and then flows into the inner bellows 13 along the first oil guide surface 211 and then flows out. At the same time, by tilting the top plate of the inner bellows 13, when the user uses the air collecting device, the top plate of the inner bellows 13 will gather the oil smoke entering the air intake port 11, so that the oil smoke can enter the air outlet channel 21 of the air outlet joint 2 more quickly; at the same time, when the oil smoke is too large, the oil smoke will blow the oil to the third oil guide surface 131, and the oil can flow on the third oil guide surface 131, and then the oil can be guided by the third oil guide surface 131 to avoid the oil gathering in the inner bellows 13.

[0054] Based on the above examples, please refer to Figure 7 , Fig. 9 and Fig.11 In other embodiments, an air inlet channel 41 extends downward from the lower surface of the air inlet joint 4, and the air inlet channel 41 is connected to the inside of the exhaust assembly 3; so that after the exhaust assembly 3 is started, the exhaust assembly 3 generates airflow to drive the oil smoke in the connecting pipe 5 to enter the exhaust assembly 3 through the air inlet channel 41 and then be discharged. A second connecting groove 42 surrounding the air inlet channel 41 is provided on the lower surface of the air inlet joint 4, and the air outlet end of the connecting pipe 5 is connected to the second connecting groove 42, and the air inlet channel 41 is sleeved in the connecting pipe 5. The second connecting groove 42 is provided to facilitate the user to install the air outlet end of the connecting pipe 5 in the second connecting groove 42, so that the air inlet joint 4 is installed on the connecting pipe 5. At the same time, the oil flowing out of the exhaust assembly 3 flows to the air inlet channel 41, and the second connecting groove 42 also prevents the connecting pipe 5 from blocking the oil flowing out of the exhaust assembly 3, thereby avoiding the situation of oil collection in the exhaust assembly 3.

[0055] Based on the above examples, please refer to Figures 7 to 11In other embodiments, a liquid guide groove 43 is provided on the upper surface of the air inlet joint 4, and the downward projection of the air inlet 31 of the exhaust assembly 3 falls into the liquid guide groove 43, and the liquid guide groove 43 is connected with the air inlet channel 41. Through the provision of the liquid guide groove 43, when the user uses the ventilation device, the oil formed by the condensation of the oil smoke in the exhaust assembly 3 flows into the liquid guide groove 43 through the air inlet 31, so that the liquid guide groove 43 receives the oil in the exhaust assembly 3, and the oil flows to the air inlet channel 41 and then flows back to the connecting pipe 5, and the oil guide groove 23 and the first connecting groove 22 respectively receive the oil flowing down from the connecting pipe 5, and the oil flows out through the oil outlet 231 and then flows into the inner bellows 13 along the first oil guide surface 211 and then flows out. The oil smoke in the exhaust assembly 3 is collected and guided through the liquid guide groove 43, thereby avoiding the accumulation of oil in the exhaust assembly 3, and also preventing the oil from dripping directly from the air inlet 31 of the exhaust assembly 3 into the connecting pipe 5 and then dripping out from the air intake port 11 to pollute the stove.

[0056] Based on the above examples, please refer to Figure 7 and Figure 8 In other embodiments, a liquid guide portion 311 extends downward from the edge of the air inlet 31, and the liquid guide portion 311 extends into the liquid guide groove 43. Through the arrangement of the liquid guide portion 311, when the user uses the ventilation device, the oil at the air inlet 31 of the exhaust component 3 flows into the liquid guide groove 43 along the liquid guide portion 311, thereby achieving more accurate oil guidance for the oil at the air inlet 31 of the exhaust component 3, and preventing the oil at the air inlet 31 of the exhaust component 3 from dripping on other places.

[0057] Based on the above examples, please refer to Figure 7 , Figure 8 and Fig. 9In other embodiments, the exhaust assembly 3 includes a bellows 32 and a centrifugal fan 33. The centrifugal fan 33 is disposed in the bellows 32. The air inlet 31 is connected to the interior of the volute of the centrifugal fan 33. The oil in the centrifugal fan 33 enters the liquid guide groove 43 through the air inlet 31. Through the arrangement of the bellows 32 and the centrifugal fan 33, when the user installs the ventilation device, the bellows 32 is fixed on the top of the stove. When the ventilation device is used, the centrifugal fan 33 is started, and the centrifugal fan 33 exhausts air outwardly. The oil smoke enters the volute of the centrifugal fan 33 through the air inlet 31, and the oil smoke is then discharged outwardly. At the same time, the oil smoke in the volute of the centrifugal fan 33 that is about to be discharged to the outside is affected by the external air, and the condensed oil flows back to the air inlet 31, and the liquid guiding groove 43 receives the oil at the air inlet 31 to prevent the oil from gathering in the exhaust component 3; at the same time, the liquid guiding groove 43 guides the oil, and the oil flows into the connecting pipe 5, and the oil in the connecting pipe 5 flows back to the air outlet joint 2, and the oil guiding groove 23 and the first connecting groove 22 respectively receive the oil flowing down in the connecting pipe 5 to prevent the oil from gathering in the connecting pipe 5; and, the oil in the oil guiding groove 23 and the oil in the first connecting groove 22 flow out through the oil outlet 231 and flow into the inner cavity of the air collecting component 1 along the first oil guiding surface 211 and then are discharged, thereby guiding the oil and preventing the oil from gathering in the exhaust component 3 and the connecting pipe 5. The ventilation device can discharge the oil smoke smoothly, thereby increasing the service life of the ventilation device.

[0058] In this embodiment, please refer to Fig.10 The exhaust assembly 3 also includes an exhaust liquid guide joint, the body of which passes through the wall of the bellows 32 and extends out of the bellows 32. An exhaust groove 312 is provided on the outer wall of the air outlet end of the exhaust liquid guide joint, and a liquid guide hole 313 communicating with the interior of the exhaust liquid guide joint is provided in the exhaust groove 312. The oil in the exhaust liquid guide joint flows along the inner wall of the exhaust liquid guide joint to the air inlet 31. The oil formed by the condensation of the oil smoke in the exhaust liquid guide joint drips into the exhaust groove 312, and the oil in the exhaust groove 312 flows through the liquid guide hole 313 and flows into the air inlet 31 along the inner wall of the exhaust liquid guide joint.

[0059] A drainage groove 314 is provided on the inner wall surface of the exhaust and liquid guiding joint located at the bottom. One end of the drainage groove 314 extends to the bottom of the exhaust groove 312, and the other end extends to the air inlet end of the exhaust and liquid guiding joint. A liquid guiding hole 313 is provided at the bottom of the exhaust groove 312 and the part aligned with the drainage groove 314. The drainage groove 314 is tilted, and the height of one end close to the liquid guiding hole 313 is higher than the height close to the air inlet end of the exhaust and liquid guiding joint. When the user uses the ventilation device, the oil liquid formed by the condensation of the oil smoke in the exhaust and liquid guiding joint drips into the exhaust groove 312, and the oil liquid in the exhaust groove 312 flows to the drainage groove 314 through the liquid guiding hole 313. The tilted drainage groove 314 guides the oil liquid to the air inlet end of the exhaust and liquid guiding joint, thereby directing the oil liquid to the air inlet 31, thereby preventing the oil liquid from gathering in the exhaust assembly 3.

[0060] 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. A ventilation device, characterized in that: include: An air collection component (1) having an air intake port (11) and an air outlet, wherein the air outlet is connected to an air outlet connector (2) for guiding oil; An air exhaust assembly (3) having an air inlet (31) and an air outlet, wherein the air inlet is connected to an air inlet connector (4) for guiding oil; A connecting pipe (5), the air inlet end of which is connected to the air outlet joint (2), and the air outlet end of which is connected to the air inlet joint (4); The air inlet end of the connecting pipe (5) is sleeved in the air outlet joint (2), and the lower end of the air inlet joint (4) is sleeved in the connecting pipe (5).

2. The ventilation device according to claim 1, characterized in that An air outlet channel (21) extends upward from the upper surface of the air outlet joint (2), and the air outlet channel (21) is connected to the interior of the air collecting component (1). A first connecting groove (22) surrounding the air outlet channel (21) is provided on the upper surface of the air outlet joint (2), and the first connecting groove (22) is connected to the air outlet channel (21). The air inlet end of the connecting pipe (5) is connected to the first connecting groove (22), and the air outlet channel (21) is sleeved in the connecting pipe (5).

3. The ventilation device according to claim 2, characterized in that The air suction port (11) is a narrow and long air suction port arranged along the width direction of the air collecting component (1), and its size in the front-to-back direction is smaller than the size of the air outlet of the air collecting component (1) in the front-to-back direction, and its size in the left-to-right direction is larger than the size of the air outlet of the air collecting component (1) in the left-to-right direction. The downward projection of the air outlet of the air collecting component (1) covers part of the air suction port (11), and an oil guide structure is provided on the air outlet joint (2), and the oil guide structure is used to guide oil from one side of the air suction port (11) to the other side of the air suction port (11) in the front-to-back direction.

4. The ventilation device according to claim 3, characterized in that The oil guide structure comprises an oil guide groove (23) arranged on the inner wall of the air outlet channel (21), the oil guide groove (23) having an oil outlet (231), a portion of the inner wall of the air outlet channel (21) aligned with the oil outlet (231) forming a first oil guide surface (211), a downward projection of the first oil guide surface (211) falling outside the air intake port (11), the first connecting groove (22) being connected to the oil guide groove (23) in an oil circuit, the oil in the first connecting groove (22) and the oil guide groove (23) flowing out through the oil outlet (231) and flowing into the inner cavity of the air collecting component (1) along the first oil guide surface (211).

5. The ventilation device according to claim 3, characterized in that: The oil guiding structure further comprises an oil guiding section (212) arranged at the lower edge of the air outlet channel (21); the oil guiding section (212) crosses the air suction port (11) in the front-to-rear direction and extends from one side of the air suction port (11) to the other side of the air suction port (11); the bottom surface of the oil guiding section (212) forms a second oil guiding surface (2121); the second oil guiding surface (2121) is arranged to be inclined from top to bottom from one side of the air suction port (11) to the other side of the air suction port (11).

6. The ventilation device according to claim 3, characterized in that: The air collecting component (1) comprises a shell (12) and an inner bellows (13), wherein the inner bellows (13) is arranged in the shell (12), and the air inlet (11) and the air outlet are connected to the inner bellows (13); the top plate of the inner bellows (13) is located on both sides of the air outlet and is inclined from an end close to the air inlet (11) to an end away from the air inlet (11), and the downward projection of the inclined portion of the top plate of the inner bellows (13) covers the air inlet (11), and the inner wall surface of the inclined portion of the top plate of the inner bellows (13) forms a third oil guide surface (131).

7. The ventilation device according to claim 1, characterized in that An air inlet channel (41) extends downward from the lower surface of the air inlet joint (4), and the air inlet channel (41) is connected to the interior of the exhaust assembly (3). A second connecting groove (42) surrounding the air inlet channel (41) is provided on the lower surface of the air inlet joint (4), and the air outlet end of the connecting pipe (5) is connected to the second connecting groove (42), and the air inlet channel (41) is sleeved in the connecting pipe (5).

8. The ventilation device according to claim 7, characterized in that The upper surface of the air inlet joint (4) is provided with a liquid guide groove (43), the downward projection of the air inlet (31) of the exhaust assembly (3) falls into the liquid guide groove (43), and the liquid guide groove (43) is connected to the air inlet channel (41).

9. The ventilation device according to claim 8, characterized in that A liquid guiding portion (311) extends downward from the edge of the air inlet (31), and the liquid guiding portion (311) extends into the liquid guiding groove (43).

10. The ventilation device according to claim 8, characterized in that The air exhaust component (3) comprises a bellows (32) and a centrifugal fan (33); the centrifugal fan (33) is arranged in the bellows (32); the air inlet (31) is connected to the interior of a volute of the centrifugal fan (33); and the oil in the centrifugal fan (33) enters the liquid guide groove (43) through the air inlet (31).

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