Range hood and its oil circuit layout structure

Abstract

This invention provides a range hood oil circuit arrangement structure, including an exhaust duct composed of a vertical duct and a horizontal duct, with an exhaust fan installed inside the exhaust duct to draw in flue gas. The exhaust duct includes an inner oil passage attached to the inner wall of the duct to drain accumulated oil, and an outer oil passage penetrating the fan housing to drain accumulated oil from the fan housing. The exhaust duct has two oil passages: an inner oil passage and an outer oil passage. The inner oil passage collects accumulated oil adsorbed on the inner wall of the exhaust duct and drains it. The outer oil passage connects to the exhaust fan, with its guide end penetrating the fan housing to drain accumulated oil from the fan housing, preventing oil buildup. Through the combined draining of the inner and outer oil passages, oil stains inside the exhaust duct are effectively removed, keeping the interior of the exhaust duct clean. This invention also provides a range hood.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and more specifically, to a range hood and a range hood oil circuit arrangement structure. Background Technology

[0002] Currently, axial flow split range hoods have relatively long flue pipes. The fumes pass through the oil mesh arranged on the smoke collection chamber. This oil mesh can block and collect large particles of fumes, while most of the small particles of fumes are drawn to the external flue by the fan.

[0003] When oil fume particles pass through the fan, the centrifugal force of the fan impeller throws the small oil fume particles onto the fan cavity wall, eventually accumulating at the bottom of the fan cavity wall. Over time, this can easily lead to oil dripping and oil accumulation, which in turn can cause bacteria growth and odor problems.

[0004] Therefore, how to effectively remove oil from the range hood is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a range hood oil circuit arrangement structure to achieve effective oil removal from the range hood; the present invention also provides a range hood.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A range hood oil circuit layout structure includes a smoke exhaust duct composed of a vertical air duct and a horizontal air duct, wherein a smoke exhaust fan for drawing and delivering smoke is installed in the smoke exhaust duct.

[0008] The exhaust duct is provided with an internal oil passage that is attached to the inner shell wall of the exhaust duct to drain the accumulated oil inside.

[0009] An external oil passage that penetrates the fan casing of the exhaust fan and drains the accumulated oil on the fan casing.

[0010] Preferably, in the above-mentioned oil circuit arrangement structure of the range hood, the exhaust fan is an axial flow fan, and the axial flow fan is located at the exhaust end of the transverse air duct;

[0011] An arc-shaped duct joint is provided between the horizontal duct and the vertical duct to seal and connect the two.

[0012] Preferably, in the above-mentioned oil circuit arrangement structure of the range hood, the transverse air duct is provided with an oil guiding angle that extends from the axial flow fan to the arc-shaped air duct joint.

[0013] Preferably, in the above-mentioned oil circuit arrangement structure of the range hood, the oil guiding angle is 2° to 5°.

[0014] Preferably, in the above-mentioned oil circuit arrangement structure of the range hood, a buffer elbow is provided between the external oil circuit and the axial flow fan.

[0015] Preferably, in the above-mentioned oil circuit arrangement structure of the range hood, the buffer elbow includes a first buffer elbow that bends from the wall thickness direction of the axial flow fan toward the exhaust end, and a second buffer elbow that bends downward from the external oil circuit that connects to the first buffer elbow.

[0016] Preferably, in the above-mentioned oil circuit arrangement structure of the range hood, the oil discharge end of the external oil circuit is provided with a first oil cup for collecting the oil discharged from the fan casing wall.

[0017] Preferably, in the above-mentioned oil circuit arrangement structure of the range hood, the buffer elbow includes a first bend elbow that bends from the wall thickness direction of the axial flow fan towards the vertical air duct direction.

[0018] The external oil circuit includes a first external oil circuit that connects to the first bend and is laid out in accordance with the shape of the horizontal air duct, and a second external oil circuit that is laid out in accordance with the shape of the vertical air duct.

[0019] A second bend is provided between the first external oil circuit and the second external oil circuit to connect the two.

[0020] Preferably, in the above-mentioned oil circuit arrangement structure of the range hood, the first external oil circuit and the second external oil circuit are installed on the outer wall surface of the exhaust duct;

[0021] The vertical air duct is equipped with a smoke collection hood at the smoke inlet end, and both the external oil circuit and the internal oil circuit are connected to the main oil cup inside the smoke collection hood.

[0022] A range hood has an axial flow fan installed in its exhaust duct, the axial flow fan being located at the air outlet end of the exhaust duct, and the oil passage provided on the exhaust duct having the range hood oil passage arrangement structure as described in any of the above.

[0023] The oil circuit arrangement structure of the range hood provided by this invention includes an exhaust duct composed of a vertical duct and a horizontal duct. An exhaust fan is installed inside the exhaust duct to draw in flue gas. The exhaust duct has an inner oil passage attached to the inner shell wall of the duct to drain accumulated oil, and an outer oil passage penetrating the fan shell wall to drain accumulated oil from the fan shell wall. The oil passages inside the range hood exhaust duct consist of two parts: the inner oil passage and the outer oil passage. The inner oil passage collects the accumulated oil adsorbed on the inner shell wall of the exhaust duct and drains it. The outer oil passage connects to the exhaust fan, and its oil guide end penetrates the fan shell wall to drain accumulated oil from the fan shell wall, preventing oil buildup on the fan shell wall. Through the combined oil guiding of the inner and outer oil passages, the oil inside the range hood exhaust duct is effectively drained, keeping the interior of the exhaust duct clean. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view of the first arrangement structure of the oil circuit arrangement structure of the range hood provided by the present invention;

[0026] Figure 2 for Figure 1 Cross-sectional view of the external oil circuit layout structure of a tobacco machine;

[0027] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0028] Figure 4 This is a front view of the second arrangement structure of the oil circuit arrangement structure of the range hood provided by the present invention;

[0029] Figure 5 for Figure 4 Cross-sectional view of the external oil circuit of the oil circuit layout structure of the Chinese tobacco machine. Detailed Implementation

[0030] This invention discloses a range hood oil circuit arrangement structure, which achieves effective oil removal from the range hood; this invention also provides a range hood.

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1-3 As shown, Figure 1 This is a front view of the first arrangement structure of the oil circuit arrangement structure of the range hood provided by the present invention; Figure 2 for Figure 1 Cross-sectional view of the external oil circuit layout structure of a tobacco machine; Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0033] This embodiment provides a range hood oil circuit arrangement structure, including a smoke exhaust duct 1 composed of a vertical duct 11 and a horizontal duct 12. A smoke exhaust fan 2 is installed inside the smoke exhaust duct 1 to draw in smoke. The smoke exhaust duct 1 has an inner oil passage attached to the inner wall of the duct for draining accumulated oil, and an outer oil passage 3 penetrating the fan casing wall of the smoke exhaust fan 2 for draining accumulated oil from the fan casing wall. The oil passages within the smoke exhaust duct 1 consist of two parts: the inner oil passage and the outer oil passage 3. The inner oil passage collects the accumulated oil adsorbed on the inner wall of the smoke exhaust duct 1 and drains it through the inner oil passage. The external oil circuit 3 is connected to the exhaust fan 2, and its oil guide end penetrates the fan casing wall of the exhaust fan 2 to discharge the oil accumulated on the fan casing wall, thus avoiding the accumulation of oil on the fan casing wall. Through the combination of internal oil circuit and external oil circuit 3, the oil stains inside the exhaust duct 1 of the range hood are effectively discharged, keeping the inside of the exhaust duct clean.

[0034] In one specific embodiment of this case, the exhaust fan 2 is an axial flow fan, which is located at the exhaust end of the horizontal duct 12; an arc-shaped duct joint 13 is provided between the horizontal duct 12 and the vertical duct 11 to seal and connect the two. The exhaust fan 2 is an axial flow fan and is arranged coaxially with the exhaust duct 1. The axial flow fan is located at the exhaust end of the exhaust duct 1, which can be located at the top of the indoor kitchen ceiling 4, effectively reducing the noise of the exhaust fan.

[0035] The range hood has a duct structure from the smoke collection hood to the exhaust fan 2. The vertical duct 11 draws the oil fumes collected by the smoke collection hood 5 upwards. Preferably, the horizontal duct 12 is installed at the top of the ceiling. The horizontal duct 12 and the vertical duct 11 are connected by an arc-shaped duct joint 13. The exhaust fan 2 is located at the end of the exhaust duct 1. During the oil fume extraction process, some oil droplets are adsorbed onto the inner wall of the exhaust duct 1, while others are thrown onto the inner wall of the exhaust fan 1 by the rotation of the fan blades of the exhaust fan 2.

[0036] Furthermore, when draining the oil adsorbed on the inner wall of the exhaust duct 1, the transverse duct 12 is provided with an oil guiding angle α that extends from the axial flow fan to the arc-shaped duct joint 13. Adapting to the bent structure of the exhaust duct 1 having a transverse duct 12 and a vertical duct 11, a certain oil guiding angle α is set in the transverse duct 12. The oil adhering to the inner wall of the exhaust duct 1 slides down to the lowest position of the transverse duct 12 under gravity, and flows axially from the transverse duct 12 towards the vertical duct 11. The oil guiding angle α prevents oil from accumulating in the transverse duct and facilitates the drainage of accumulated oil.

[0037] Preferably, the oil guide angle α is 2° to 5°.

[0038] In one specific embodiment of this case, a buffer elbow is provided between the external oil passage 3 and the axial flow fan to buffer the dripping of accumulated oil from the axial flow fan. The external oil passage 3 is an independent oil passage extending from the exhaust duct 1. During the rotation of the axial flow fan blades, the oil is thrown onto the fan casing wall 21 of the axial flow fan. The external oil passage 3 runs through the thickness direction of the fan casing and is located at the lowest position of the fan casing wall 21.

[0039] The rotating blades of the axial flow fan will adhere to a large amount of oil and throw it around the fan casing 21. To prevent the oil on the fan casing 21 from dripping directly from the external oil passage 3 when it reaches the lowest position of the fan casing 21, causing dripping noise or splashing of oil in the oil cup 6 at the end of the external oil passage 3, a buffer elbow is installed between the external oil passage 3 and the axial flow fan. The oil flowing out of the fan casing 21 is redirected by the buffer elbow, thus avoiding dripping noise and oil splashing.

[0040] Furthermore, the buffer elbow includes a first buffer elbow 31 that bends from the wall thickness direction of the axial flow fan towards the exhaust end, and a second buffer elbow 32 that bends downward from the external oil passage connecting to the first buffer elbow 31. The oil discharged from the axial flow fan needs to be collected in an oil cup for easy removal; therefore, the external oil passage 3 needs to extend downward from the axial flow fan location to a position easily accessible by hand. The end of the exhaust duct 1 is usually directly connected to the external flue. The buffer elbow is configured to include a first buffer elbow 31 and a second buffer elbow 32. The first buffer elbow 31 redirects the oil flowing down the fan casing wall 21 and extends through an external oil passage to be flush with the end of the exhaust duct 1. The second buffer elbow 32 further redirects the oil downward and leads it into the oil cup.

[0041] With the first buffer elbow 31 and the second buffer elbow 32, the external oil circuit 3 can be attached to the wall, reducing its space occupation, making it easy to fix, and its oil circuit fixing structure is stable.

[0042] The external oil passage 3 is equipped with a first oil cup 6 at its oil outlet end to collect the oil discharged from the fan casing wall 21. The external oil passage 3 and the internal oil passage use two separate oil cups for oil collection. The first oil cup 6 collects the oil discharged from the external oil passage 3, while the oil discharged from the internal oil passage is collected by the internal oil cup 14. This allows for separate cleaning of oil at different locations, extending the time interval for oil cleaning.

[0043] like Figure 4 and Figure 5 As shown, Figure 4 This is a front view of the second arrangement structure of the oil circuit arrangement structure of the range hood provided by the present invention; Figure 5 for Figure 4 Cross-sectional view of the external oil circuit of the oil circuit layout structure of the Chinese tobacco machine.

[0044] In a specific embodiment of this case, the buffer elbow includes a first bend elbow 41 that bends from the wall thickness direction of the axial flow fan toward the vertical air duct direction. The external oil passage 3 includes a first external oil passage 431 that connects to the first bend elbow 41 and is laid out in accordance with the shape of the horizontal air duct 12, and a second external oil passage 432 that is laid out in accordance with the shape of the vertical air duct 11. A second bend elbow 42 is provided between the first external oil passage 431 and the second external oil passage 432 to connect the two.

[0045] The external oil circuit 3 and the internal oil circuit adopt two separate oil cups. An independent external oil circuit fixing structure needs to be set on the flue wall. In order to meet the needs of different users and reduce the fixing structure of the range hood, the external oil circuit 3 can also adopt a conformal structure that is fixed together with the exhaust duct 1.

[0046] Specifically, the buffer elbow bends from the first bend elbow 41 towards the vertical air duct 11, serving as a single bend to buffer the dripping of oil. The first bend elbow 41 connects to the first external oil passage 431, which is fixed to the outer wall of the transverse air duct 12. Its arrangement direction follows the shape of the transverse air duct 12, that is, the first external oil passage 431 and the transverse air duct 12 have the same oil guiding angle, facilitating the outflow of oil.

[0047] The first external oil passage 431 extends to the position of the arc-shaped air duct joint 13 and is connected to the second external oil passage 432 through the second bend elbow 42. An oil cup is set at the end of the second external oil passage 432, or an oil cup connected to the smoke collection chamber can be set. The second external oil passage 432 is fixed to the vertical air duct 11 in a conformal manner to ensure support strength and reduce the difficulty of fixing.

[0048] The external oil circuit 3 and the internal oil circuit share the same oil cup, reducing the difficulty of oil cleaning and minimizing the space required for installation. The external oil circuit can be configured as an independent structure and fixed to the outer wall of the exhaust duct. Alternatively, the external oil circuit can be machined onto the inner wall of the exhaust duct to improve its aesthetic appearance.

[0049] Preferably, the first external oil passage 431 and the second external oil passage 432 are mounted on the outer wall of the exhaust duct 1; a smoke collection hood 5 is provided at the smoke inlet end of the vertical duct 11, and both the external oil passage 3 and the internal oil passage are connected to the main oil cup inside the smoke collection hood.

[0050] Based on the oil circuit arrangement structure of the range hood provided in the above embodiments, the present invention also provides a range hood, wherein an axial flow fan is provided in the exhaust duct, the axial flow fan is provided at the air outlet end of the exhaust duct, and the oil circuit provided on the exhaust duct has the oil circuit arrangement structure of the range hood provided in the above embodiments.

[0051] Since this range hood adopts the range hood oil circuit layout structure of the above embodiment, please refer to the above embodiment for the beneficial effects brought by the range hood oil circuit layout structure.

[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A range hood oil circuit layout structure, characterized in that, It includes a smoke exhaust duct consisting of a vertical air duct and a horizontal air duct, and a smoke exhaust fan is installed in the smoke exhaust duct to extract and deliver the smoke. The exhaust duct is provided with an internal oil passage that is attached to the inner shell wall of the exhaust duct to drain the accumulated oil inside. An external oil passage is provided that penetrates the fan casing wall of the exhaust fan and drains the accumulated oil on the fan casing wall; the external oil passage is set independently of the exhaust duct and is connected to the fan casing wall of the exhaust fan. The exhaust fan is an axial flow fan, which is located at the exhaust end of the transverse duct; an arc-shaped duct joint is provided between the transverse duct and the vertical duct to seal and connect the two. The transverse air duct is configured with an oil guide angle that extends from the axial flow fan to the arc-shaped air duct joint.

2. The oil circuit arrangement structure of the range hood according to claim 1, characterized in that, The oil guide angle is 2°~5°.

3. The oil circuit arrangement structure of the range hood according to claim 1, characterized in that, A buffer bend is provided between the external oil circuit and the axial flow fan.

4. The oil circuit arrangement structure of the range hood according to claim 3, characterized in that, The buffer elbow includes a first buffer elbow that bends from the wall thickness direction of the axial flow fan toward the exhaust end, and a second buffer elbow that bends downward from an external oil passage connected to the first buffer elbow.

5. The oil circuit arrangement structure of the range hood according to claim 4, characterized in that, The external oil circuit has an oil outlet end equipped with a first oil cup for collecting the oil discharged from the fan casing wall.

6. The oil circuit arrangement structure of the range hood according to claim 3, characterized in that, The buffer elbow includes a first bend elbow that bends from the wall thickness direction of the axial flow fan toward the vertical air duct direction. The external oil circuit includes a first external oil circuit that connects to the first bend and is laid out in accordance with the shape of the horizontal air duct, and a second external oil circuit that is laid out in accordance with the shape of the vertical air duct. A second bend is provided between the first external oil circuit and the second external oil circuit to connect the two.

7. The oil circuit arrangement structure of the range hood according to claim 6, characterized in that, The first external oil passage and the second external oil passage are installed on the outer wall of the exhaust duct; The smoke inlet of the vertical air duct is connected to the smoke collection hood, and both the external oil circuit and the internal oil circuit are connected to the main oil cup inside the smoke collection hood.

8. A range hood, characterized in that, An axial flow fan is installed in the exhaust duct, and the axial flow fan is located at the air outlet end of the exhaust duct. The oil circuit provided on the exhaust duct has the oil circuit arrangement structure of the smoke machine as described in any one of claims 1-7.

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