A bottom-mounted air duct exhaust pipe connection structure

Abstract

The present invention discloses a bottom-mounted air duct and oil smoke exhaust pipe connection structure, which includes an inner smoke exhaust pipe, a main unit, an outer smoke exhaust pipe, a negative pressure box, and an exhaust extension pipe. The negative pressure box includes a negative pressure shell and a fan. The fan is placed in the negative pressure shell and also includes an exhaust pipe sealing ring. The exhaust channel inside the inner smoke exhaust pipe is in the shape of a column or a table as a whole. The horizontal height of the exhaust channel near the fan at the lowest point in the inner smoke exhaust pipe is lower than the horizontal height of the exhaust channel near the lowest point in the exhaust pipe sealing ring. Such a design can allow the oil condensed in the inner smoke exhaust pipe to flow back to the negative pressure box due to the natural height difference inside the inner smoke exhaust pipe, thereby avoiding the accumulation of oil in the inner smoke exhaust pipe, the outer smoke exhaust pipe, and the exhaust extension pipe. At the same time, such a design can raise the horizontal position of the outer smoke exhaust pipe and the exhaust extension pipe to avoid conflict with the bottom of the cabinet next to the integrated stove. The exhaust channel inside the inner smoke exhaust pipe is in the shape of a column or a table as a whole. Such a design can make the air circulation smoother.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated stoves, and in particular to a bottom-mounted air duct and oil smoke exhaust pipe connection structure. Background Art

[0002] Nowadays, most integrated stoves have a downward exhaust structure. Oil and dirt accumulate under the integrated stove, blocking the air duct and affecting the performance of the integrated stove. As a result, the integrated stove usually needs to be disassembled and the entire machine cleaned after two years of use. Therefore, improvements are needed. Summary of the Invention

[0003] The present invention aims to solve the defects in the prior art such as the accumulation of oily dirt under the integrated stove and the blocking of the air duct, and provides a new lower-mounted air duct and oil fume exhaust pipe connection structure.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] 1. The smoke exhaust duct of claim 1, wherein the smoke exhaust duct is an airtight container and the smoke exhaust duct is connected to the fan housing. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection. The smoke exhaust duct is connected to the fan housing by a threaded connection.

[0006] The lowest point of the exhaust duct near the fan in the inner exhaust duct is lower than the lowest point of the exhaust duct near the exhaust duct sealing ring. This design allows condensed oil and dirt in the inner exhaust duct to flow back into the negative pressure box due to the natural height difference inside the inner exhaust duct, preventing oil and dirt from accumulating in the inner exhaust duct, outer exhaust duct, and exhaust extension duct. At the same time, this design raises the horizontal position of the outer exhaust duct and exhaust extension duct to avoid interference with the bottom of the cabinet next to the integrated stove. The exhaust duct inside the inner exhaust duct is generally cylindrical or platform-shaped, which allows for smoother air circulation.

[0007] Preferably, the above-mentioned downward-mounted air duct exhaust pipe connection structure also includes an internal exhaust oil return pipe, the exhaust pipe sealing ring is sleeved on the outside of the inner exhaust pipe mouth, the exhaust pipe sealing ring is provided with an external connecting groove and a sealing ring oil return pipe, the sealing ring oil return pipe is located at the lower part of the exhaust pipe sealing ring, the external exhaust pipe is inserted into the external connecting groove, the sealing ring oil return pipe connects the external connecting groove and the internal exhaust oil return pipe, the internal exhaust oil return pipe connects the sealing ring return pipe and the internal space of the negative pressure box, and the connection point between the sealing ring oil return pipe and the external connecting groove is located at the lowest point of the external connecting groove in the horizontal position.

[0008] The sealing ring oil return pipe is used to return the accumulated oil in the external connection groove to the internal exhaust oil return pipe and finally into the oil collection box.

[0009] Preferably, in the above-mentioned bottom-mounted air duct and oil fume exhaust pipe connection structure, the outer connection groove is provided with an oil-blocking protrusion near the opening.

[0010] The provision of the oil-blocking convex portion can allow the oil in the external connecting groove to flow into the oil return pipe of the sealing ring.

[0011] Preferably, the above-mentioned bottom-mounted air duct exhaust pipe connection structure further includes an external exhaust sealing ring, which is placed in the external connection groove and respectively abuts against the exhaust pipe sealing ring and the inner wall of the external exhaust pipe.

[0012] The external smoke exhaust sealing ring plays a sealing role, which can reduce the oil spilled from the connection gap between the smoke exhaust pipe sealing ring and the external smoke exhaust pipe.

[0013] Preferably, in the above-mentioned bottom-mounted air duct and oil fume exhaust pipe connection structure, the outer wall of the sealing ring oil return pipe is provided with an oil return pipe introduction slope.

[0014] The setting of the oil return pipe introduction slope makes the connection between the sealing ring oil return pipe and the inner smoke exhaust pipe easier and plays a certain sealing role.

[0015] Preferably, the above-mentioned downward-mounted air duct exhaust pipe connection structure further includes an expansion core rod, the outer exhaust pipe is provided with a locking cone sleeve, the exhaust pipe sealing ring is provided with a cone sleeve connector, the cone sleeve connector is provided with a cone sleeve connecting hole, the locking cone sleeve is provided with a cone sleeve elastic arm, and the top of the cone sleeve elastic arm is provided with a cone sleeve buckle, the expansion core rod passes through the locking cone sleeve, the locking cone sleeve is inserted into the cone sleeve connecting hole, and the cone sleeve buckle is clamped with the edge of the cone sleeve connecting hole close to the inner exhaust pipe with the help of the expansion core rod.

[0016] The exhaust pipe sealing ring is used to seal the joint between the outer exhaust pipe and the inner exhaust pipe, so that the smoke will not overflow from the connection between the two. The inner exhaust pipe and the exhaust pipe sealing ring are pre-connected with screws, and then the exhaust pipe sealing ring is aligned with the reserved hole on the host, and the exhaust pipe sealing ring is fixed to the host with screws. After the locking cone sleeve is inserted into the cone sleeve connection hole, the expansion core rod is inserted into the locking cone sleeve. The elastic arm of the cone sleeve expands outward to force the cone sleeve buckle to engage with the edge of the cone sleeve connection hole close to the inner exhaust pipe. From the specific operation point of view, you only need to insert the locking cone sleeve of the outer exhaust pipe into the cone sleeve connection hole, and then insert the expansion core rod into the locking cone sleeve to complete the connection of the outer exhaust pipe. The operation is simple and provides convenience for the installation and removal of the outer exhaust pipe.

[0017] Preferably, in the above-mentioned bottom-mounted air duct exhaust pipe connection structure, a cone sleeve introduction slope is provided on the side of the cone sleeve connection hole close to the external exhaust pipe, and a cone sleeve upper slope is provided on the top of the cone sleeve buckle.

[0018] The arrangement of the tapered sleeve lead-in inclined surface and the tapered sleeve upper inclined surface facilitates the process of locking the tapered sleeve and inserting it into the tapered sleeve connecting hole.

[0019] Preferably, in the above-described downward-mounted air duct exhaust pipe connection structure, a cone sleeve lead-out inclined surface is provided on the side of the cone sleeve connection hole close to the inner exhaust pipe, and a cone sleeve lower inclined surface is provided on the cone sleeve buckle, and the cone sleeve lead-out inclined surface is snap-connected with the cone sleeve lower inclined surface.

[0020] The arrangement of the tapered sleeve leading-out inclined surface and the tapered sleeve lower inclined surface provides convenience for the process of locking the tapered sleeve and inserting it into the tapered sleeve connecting hole.

[0021] Preferably, in the above-described downward-mounted air duct exhaust pipe connection structure, the expansion core rod is provided with a core rod step, the locking cone sleeve is provided with a cone sleeve hole, the expansion core rod passes through the cone sleeve hole, and the core rod step abuts against the edge surface of the cone sleeve hole on the side away from the inner exhaust pipe.

[0022] The setting of the core rod step can make the expansion core rod stop after being inserted into the locking cone sleeve to a certain extent, avoiding the situation that the expansion core rod is difficult to pull out due to being inserted too much.

[0023] Preferably, in the above-described downward-mounted air duct exhaust pipe connection structure, the external exhaust pipe is an eccentric structure, the cross-section of the external exhaust pipe close to the internal exhaust pipe is adapted to the internal exhaust pipe, and the cross-section of the external exhaust pipe close to the exhaust extension pipe is circular and adapted to the exhaust extension pipe.

[0024] The external smoke exhaust pipe has an eccentric structure, which can more effectively connect the internal smoke exhaust pipe and the smoke exhaust extension pipe, so that the smoke exhaust extension pipe can be closer to the inner wall of the cabinet or the wall, saving more space.

[0025] Preferably, in the above-mentioned bottom-mounted air duct exhaust pipe connection structure, the external exhaust pipe is provided with a rectifier plate.

[0026] The setting of the rectifier plate can sort out the turbulence of the gas flow after being discharged from the inclined inner exhaust pipe and the outer exhaust pipe with a changing cross-section. At the same time, this design also increases the strength of the outer exhaust pipe and effectively improves the deformation of the rectangular air outlet.

[0027] Preferably, in the above-mentioned bottom-mounted air duct and oil fume exhaust pipe connection structure, the cross-section of the rectifier plate is teardrop-shaped.

[0028] The cross section of the rectifier is teardrop-shaped, which reduces the windward area, lowers wind resistance and reduces noise.

[0029] Preferably, in the above-mentioned bottom-mounted air duct exhaust pipe connection structure, the cross-section of the inner exhaust pipe is rectangular.

[0030] The internal smoke exhaust pipe is mainly used for connection with the fan. Conventional internal smoke exhaust pipes mainly use pipes with a circular cross-section, which does not match the outlet of the fan and easily causes airflow turbulence. Therefore, the use of an internal smoke exhaust pipe with a rectangular cross-section can effectively solve the problem of airflow turbulence. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a cross-sectional view of the present invention;

[0032] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0033] Figure 3 is a cross-sectional view of the expansion mandrel of the present invention;

[0034] Figure 4 is a cross-sectional view of the sealing ring of the smoke exhaust pipe in the present invention;

[0035] Figure 5 This is a schematic structural diagram of the smoke exhaust pipe sealing ring of the present invention;

[0036] Figure 6 This is an exploded view of the smoke exhaust pipe sealing ring of the present invention;

[0037] Figure 7 Schematic diagram of the structure of the locking cone sleeve in the present invention;

[0038] Figure 8 Schematic diagram of the structure of the external smoke exhaust pipe in the present invention;

[0039] Figure 9 This is a cross-sectional view of the negative pressure box, inner smoke exhaust pipe, smoke exhaust pipe sealing ring, and inner smoke exhaust oil return pipe after connection in the present invention;

[0040] Figure 10 for Figure 9 A partial enlarged view of point B in the middle. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-10 The present invention is further described in detail with specific embodiments, but they are not intended to limit the present invention: Example

[0042] A downward-mounted air duct exhaust pipe connection structure includes an inner exhaust pipe 3, a main unit 2, an outer exhaust pipe 1, a negative pressure box 6, and an exhaust extension pipe 7. The negative pressure box 6 is placed inside the main unit 2. The negative pressure box 6 includes a negative pressure shell 61 and a fan 62. The fan 62 is placed inside the negative pressure shell 61 and also includes an exhaust pipe sealing ring 4. The exhaust pipe sealing ring 4 connects one end of the outer exhaust pipe 1 and one end of the inner exhaust pipe 3. The other end of the inner exhaust pipe 3 is inserted into the negative pressure shell 61 and connected to the fan 62. The other end of the outer exhaust pipe 1 is connected to the exhaust extension pipe 7. The exhaust pipe sealing ring 4 is connected to the main unit 2 by means of screws. The horizontal height of the lowest point of the exhaust channel in the inner exhaust pipe 3 near the fan 62 is lower than the horizontal height of the lowest point of the exhaust channel near the exhaust pipe sealing ring 4. The exhaust channel inside the inner exhaust pipe 3 is a column or a table as a whole.

[0043] Preferably, it also includes an internal smoke exhaust oil return pipe 14, the smoke exhaust pipe sealing ring 4 is sleeved on the outside of the mouth of the internal smoke exhaust pipe 3, the smoke exhaust pipe sealing ring 4 is provided with an external connecting groove 43 and a sealing ring oil return pipe 44, the sealing ring oil return pipe 44 is located at the lower part of the smoke exhaust pipe sealing ring 4, the external smoke exhaust pipe 1 is inserted into the external connecting groove 43, the sealing ring oil return pipe 44 connects the external connecting groove 43 with the internal smoke exhaust oil return pipe 14, the internal smoke exhaust oil return pipe 14 connects the sealing ring return pipe 44 with the internal space of the negative pressure box 6, and the connection point between the sealing ring oil return pipe 44 and the external connecting groove 43 is located at the lowest point of the external connecting groove 43 in the horizontal position.

[0044] Preferably, the external connection groove 43 is provided with an oil-blocking protrusion 431 near the opening.

[0045] Preferably, an external smoke exhaust sealing ring 81 is further included, which is placed in the external connecting groove 43 and respectively abuts against the inner wall of the smoke exhaust pipe sealing ring 4 and the external smoke exhaust pipe 1.

[0046] Preferably, an oil return pipe introduction slope 441 is provided on the outer wall of the sealing ring oil return pipe 44 .

[0047] Preferably, it also includes an expansion core rod 5, the outer smoke exhaust pipe 1 is provided with a locking cone sleeve 11, the smoke exhaust pipe sealing ring 4 is provided with a cone sleeve connector 41, the cone sleeve connector 41 is provided with a cone sleeve connecting hole 42, the locking cone sleeve 11 is provided with a cone sleeve elastic arm 12, and the top of the cone sleeve elastic arm 12 is provided with a cone sleeve buckle 13, the expansion core rod 5 passes through the locking cone sleeve 11, and the locking cone sleeve 11 is inserted into the cone sleeve connecting hole 42, and the cone sleeve buckle 13 is clamped with the edge of the cone sleeve connecting hole 42 close to the inner smoke exhaust pipe 3 by means of the expansion core rod 5.

[0048] Preferably, a cone sleeve introduction inclined surface 421 is provided on the side of the cone sleeve connecting hole 42 close to the external smoke exhaust pipe 1 , and a cone sleeve upper inclined surface 131 is provided on the top of the cone sleeve buckle 13 .

[0049] Preferably, the cone sleeve connecting hole 42 is provided with a cone sleeve leading out inclined surface 422 on the side close to the inner smoke exhaust pipe 3 , and the cone sleeve buckle 13 is provided with a cone sleeve lower inclined surface 132 , and the cone sleeve leading out inclined surface 422 is engaged with the cone sleeve lower inclined surface 132 .

[0050] Preferably, the expansion core rod 5 is provided with a core rod step 51, and the locking cone sleeve 11 is provided with a cone sleeve hole 111. The expansion core rod 5 passes through the cone sleeve hole 111, and the core rod step 51 abuts against the edge surface of the cone sleeve hole 111 away from the inner smoke exhaust pipe 3.

[0051] Preferably, the external smoke exhaust pipe 1 is an eccentric structure, the cross-section of the external smoke exhaust pipe 1 near the internal smoke exhaust pipe 3 is adapted to the internal smoke exhaust pipe 3, and the cross-section of the external smoke exhaust pipe 1 near the exhaust extension pipe 7 is circular and adapted to the exhaust extension pipe 7.

[0052] Preferably, the external smoke exhaust pipe 1 is provided with a rectifying plate.

[0053] Preferably, the cross section of the rectifying plate is in the shape of a teardrop.

[0054] Preferably, the cross section of the inner smoke exhaust pipe 3 is rectangular.

[0055] When the present invention is in use, fan 62 blows cooking fumes into the exhaust passage of inner exhaust pipe 3. The fumes are then directed through inner exhaust pipe 3 into outer exhaust pipe 1, where they are combed by a rectifier plate and ultimately released to the outside via exhaust extension pipe 7. Oil condensed on the inner wall of inner exhaust pipe 3 flows back into negative pressure housing 61 under the influence of gravity. Oil accumulated at the joint between outer exhaust pipe 1 and exhaust pipe seal 4 flows back into negative pressure housing 61 via inner exhaust oil return pipe 14 and seal oil return pipe 44.

[0056] In short, the above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A bottom-mounted air duct and oil smoke exhaust pipe connection structure, comprising an inner smoke exhaust pipe (3), a main unit (2), an outer smoke exhaust pipe (1), a negative pressure box (6), and a smoke exhaust extension pipe (7), wherein the negative pressure box (6) is placed inside the main unit (2), the negative pressure box (6) comprises a negative pressure shell (61), and a fan (62), wherein the fan (62) is placed inside the negative pressure shell (61), and wherein: It also includes a smoke exhaust pipe sealing ring (4), the smoke exhaust pipe sealing ring (4) connecting one end of the outer smoke exhaust pipe (1) and one end of the inner smoke exhaust pipe (3), the other end of the inner smoke exhaust pipe (3) is inserted into the negative pressure housing (61) and communicated with the fan (62), the other end of the outer smoke exhaust pipe (1) is connected to the smoke exhaust extension pipe (7), the smoke exhaust pipe sealing ring (4) is connected to the main unit (2) by means of screws, the horizontal height of the lowest point of the smoke exhaust channel in the inner smoke exhaust pipe (3) near the fan (62) is lower than the horizontal height of the lowest point of the smoke exhaust channel near the smoke exhaust pipe sealing ring (4), and the smoke exhaust channel inside the inner smoke exhaust pipe (3) is a column or a table as a whole; It also includes an inner smoke exhaust oil return pipe (14), the smoke exhaust pipe sealing ring (4) is sleeved on the outer side of the mouth of the inner smoke exhaust pipe (3), the smoke exhaust pipe sealing ring (4) is provided with an outer connecting groove (43) and a sealing ring oil return pipe (44), the sealing ring oil return pipe (44) is located at the lower part of the smoke exhaust pipe sealing ring (4), the outer smoke exhaust pipe (1) is inserted into the outer connecting groove (43), the sealing ring oil return pipe (44) connects the outer connecting groove (43) and the inner smoke exhaust oil return pipe (14), the inner smoke exhaust oil return pipe (14) connects the sealing ring oil return pipe (44) and the internal space of the negative pressure box (6), and the connection point between the sealing ring oil return pipe (44) and the outer connecting groove (43) is located at the lowest point of the outer connecting groove (43) in the horizontal position.

2. The bottom-mounted air duct and oil fume exhaust pipe connection structure according to claim 1, characterized in that: The external connection groove (43) is provided with an oil-blocking convex portion (431) near the opening.

3. The bottom-mounted air duct and oil fume exhaust pipe connection structure according to claim 1, characterized in that: It also includes an external smoke exhaust sealing ring (81), which is placed in the external connection groove (43) and respectively abuts against the smoke exhaust pipe sealing ring (4) and the inner wall of the external smoke exhaust pipe (1).

4. The bottom-mounted air duct and oil fume exhaust pipe connection structure according to claim 1, characterized in that: An oil return pipe introduction inclined surface (441) is provided on the outer wall of the sealing ring oil return pipe (44).

5. The bottom-mounted air duct and oil fume exhaust pipe connection structure according to claim 1, characterized in that: It also includes an expansion core rod (5), the outer smoke exhaust pipe (1) is provided with a locking cone sleeve (11), the smoke exhaust pipe sealing ring (4) is provided with a cone sleeve connector (41), the cone sleeve connector (41) is provided with a cone sleeve connecting hole (42), the locking cone sleeve (11) is provided with a cone sleeve elastic arm (12), the top of the cone sleeve elastic arm (12) is provided with a cone sleeve buckle (13), the expansion core rod (5) passes through the locking cone sleeve (11), the locking cone sleeve (11) is inserted into the cone sleeve connecting hole (42), and the cone sleeve buckle (13) is clamped with the edge of the cone sleeve connecting hole (42) close to the inner smoke exhaust pipe (3) by means of the expansion core rod (5).

6. The bottom-mounted air duct and oil fume exhaust pipe connection structure according to claim 5, characterized in that: A cone sleeve introduction inclined surface (421) is provided on one side of the cone sleeve connection hole (42) close to the external smoke exhaust pipe (1), and a cone sleeve upper inclined surface (131) is provided on the top of the cone sleeve buckle (13).

7. The bottom-mounted air duct and oil fume exhaust pipe connection structure according to claim 5, characterized in that: A cone sleeve leading out inclined surface (422) is provided on one side of the cone sleeve connecting hole (42) close to the inner smoke exhaust pipe (3), and a cone sleeve lower inclined surface (132) is provided on the cone sleeve buckle (13), and the cone sleeve leading out inclined surface (422) is engaged with the cone sleeve lower inclined surface (132).

8. The bottom-mounted air duct and oil fume exhaust pipe connection structure according to claim 5, characterized in that: The expansion core rod (5) is provided with a core rod step (51), the locking cone sleeve (11) is provided with a cone sleeve hole (111), the expansion core rod (5) passes through the cone sleeve hole (111), and the core rod step (51) abuts against the edge surface of the cone sleeve hole (111) on a side away from the inner smoke exhaust pipe (3).

9. The bottom-mounted air duct and oil fume exhaust pipe connection structure according to claim 1, characterized in that: The outer smoke exhaust pipe (1) is an eccentric structure. The cross section of the outer smoke exhaust pipe (1) near the inner smoke exhaust pipe (3) is compatible with the inner smoke exhaust pipe (3). The cross section of the outer smoke exhaust pipe (1) near the smoke exhaust extension pipe (7) is circular and compatible with the smoke exhaust extension pipe (7).

10. The bottom-mounted air duct and oil fume exhaust pipe connection structure according to claim 1, characterized in that: The external smoke exhaust pipe (1) is provided with a rectifying plate.

11. The bottom-mounted air duct and oil fume exhaust pipe connection structure according to claim 10, characterized in that: The cross section of the rectifying plate is in a water drop shape.

12. The bottom-mounted air duct and oil fume exhaust pipe connection structure according to claim 1, characterized in that: The cross section of the inner smoke exhaust pipe (3) is rectangular.

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