Silencing range hood check valve

Abstract

A silencing range hood check valve comprises a valve body, a valve element and an air outlet connector, and the valve body comprises a bottom square annular seat, a frustum-shaped body part, a top circular ring seat, a radial seat frame and a hinge seat arranged on the radial seat frame; the valve core comprises a semicircular core plate and a rotating shaft; the air outlet connector comprises a connector part, a connecting cavity and a silencing pipe arranged at the bottom of the connector part, and the diameter of the connecting cavity is larger than that of the connector part. A gap between the hush pipe and the connector part forms a smoke exhaust pipe inserting groove of the range hood; the radius of the silencing pipe is greater than that of the semicircular core plate; and the connecting cavity is detachably connected with the top circular ring seat. And by arranging the silencing pipe on the air outlet interface, the noise during smoke exhaust is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a range hood, especially a check valve. BACKGROUND

[0002] The prior art, Chinese patent 201820042694.9, a check valve and smoke pipe assembly of a range hood, including check valve and smoke pipe, check valve includes valve body, valve core, valve core seat and air outlet interface;The smoke pipe includes threaded body, upper interface and lower interface;The lower end of the lower interface of the smoke pipe is provided with a ladder;The outer circumferential surface of the air outlet interface is provided with a stop buckle body;It also includes a fastening ring, the fastening ring includes a cylindrical body and a ring-shaped connecting seat around the cylindrical body, the ring-shaped connecting seat is provided with a buckling hole;The lower end of the lower interface is combined with the bottom plate of the air outlet interface by inserting into the air outlet interface;The cylindrical body of the fastening ring is inserted into the air outlet interface, and the lower end of the cylindrical body is supported and cooperated with the ladder;The stop buckle body is embedded with the buckling hole. The problem is that the noise is large when entering the smoke pipe from the air outlet interface. SUMMARY

[0003] The utility model aims at providing a check valve of the range hood, which has the characteristics of air outlet interface and noise reduction.

[0004] The utility model is realized as follows: a check valve of the range hood, including valve body, valve core and air outlet interface, the valve body includes bottom ring seat, taper body, top circular seat, radial seat frame and hinged seat arranged on the radial seat frame;The bottom plate of the counterbore in the top circular seat is flush with the upper surface of the radial seat frame;The valve core includes semicircular core plate and rotating shaft;Its special feature is that: the air outlet interface includes interface part, connecting cavity and sound attenuation pipe arranged at the bottom of the interface part, the diameter of the connecting cavity is larger than the diameter of the interface part;The gap between the sound attenuation pipe and the interface part constitutes the smoke exhaust pipe insertion slot of the range hood;The radius of the sound attenuation pipe is larger than the radius of the semicircular core plate;

[0005] The connecting cavity is detachably connected with the top circular seat.

[0006] The special feature of the check valve of the range hood is that: the upper end of the sound attenuation pipe is provided with a tooth groove.

[0007] The special feature of the check valve of the range hood is that: the upper end surface of the sound attenuation pipe is arc-shaped, and the upper end is wave-shaped.

[0008] The special feature of the check valve of the range hood is that: the outer circumferential surface of the top circular seat is provided with a locking block;

[0009] The inner wall of the connecting cavity is provided with a locking seat, and the locking seat is provided with a locking groove with one end open;

[0010] The locking block is locked with the locking groove.

[0011] The speciality of the sound-damping range hood check valve lies in that the locking groove is provided with an axial stop protrusion; and the locking block is located in the locking groove between the closed end of the locking groove and the axial stop protrusion.

[0012] The speciality of the sound-damping range hood check valve lies in that the upper end of the sound-damping pipe is tapered.

[0013] The speciality of the sound-damping range hood check valve lies in that the upper end of the sound-damping pipe is tapered.

[0014] The speciality of the sound-damping range hood check valve lies in that the outer surface of the interface part is provided with an axial reinforcing plate and a connecting hole penetrating through the axial reinforcing plate and the interface part.

[0015] The utility model discloses a sound-damping range hood check valve, and the setting of the sound-damping pipe on the air outlet interface reduces the noise during smoke exhaust. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the sectional view of the utility model.

[0017] Figure 2 It is the A-A view of Figure 1

[0018] Figure 3 It is the perspective view of the utility model.

[0019] Figure 4 It is one of the perspective exploded view of the utility model.

[0020] Figure 5 It is the second perspective exploded view of the utility model.

[0021] Figure 6 It is the third perspective exploded view of the utility model. DETAILED DESCRIPTION

[0022] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as the limitation of the utility model.

[0023] ​In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figure 1 , Figure 2 As shown, a noise-reducing check valve for a range hood includes a valve body 1, a valve core 2, and an air outlet 3. The valve body 1 includes a bottom square annular seat 11, a frustum-shaped body 12, a top circular annular seat 13, a radial seat 14, and a hinge seat 15 mounted on the radial seat. The top circular annular seat 15 has a countersunk hole, and the bottom plate of the countersunk hole is flush with the upper surface of the radial seat. The valve core 2 includes a semi-circular core plate 21 and a rotating shaft 22. The two ends of the rotating shaft are rotatably engaged with the hinge seat. In a static state, the radial seat 14 and the bottom plate of the countersunk hole support the semi-circular core plate 21.

[0025] The air outlet 3 includes an interface portion 31, a connecting cavity 32, and a silencer pipe 33 located at the bottom of the interface portion 31. The diameter of the connecting cavity 32 is larger than the diameter of the interface portion 31. The gap between the silencer pipe 33 and the interface portion 31 forms the exhaust pipe insertion groove 34 of the smoke machine. The radius of the silencer pipe 33 is larger than the radius of the semi-circular core plate 21. With this design, when the smoke plate is working, the semi-circular core plate 12 extends out from the silencer pipe 33.

[0026] The connecting cavity 32 is detachably connected to the top annular seat 13. When the smoke machine is working, the semi-circular core plate 21 extends from the silencer tube 33, and the combined action of the semi-circular core plate 21 and the silencer tube 33 achieves noise reduction.

[0027] The upper end of the silencer tube 33 is provided with a toothed groove.

[0028] Alternatively, the upper end face of the silencer tube 33 may be arc-shaped or wavy.

[0029] The upper end of the silencer pipe 33 is tapered.

[0030] As a further improvement of this utility model: the upper end of the silencer tube 33 is spherical curved and constricted.

[0031] As a further improvement of this utility model: a locking block 131 is provided on the outer circumferential surface of the top ring seat 13;

[0032] The inner wall of the connecting cavity 32 is provided with a locking seat 321, and the locking seat is provided with a locking groove 322 with one end open;

[0033] Locking block 131 engages with locking groove 322;

[0034] As further improvement of the utility model: the locking groove 322 is equipped with axial stop projection 323; the locking block 131 is located in the locking groove 322 between the closed end of locking groove 322 and axial stop projection 323. Play the effect of anti-loose.

[0035] The outer surface of the interface part 31 is provided with an axial reinforcing plate 311 and a connecting hole 312 penetrating through the axial reinforcing plate 311 and the interface part 31. In use, a screw passes through the connecting hole 312 and is screwed with the smoke pipe. With such a structure, the smoke pipe is fixed, and vibration of the smoke pipe is reduced.

[0036] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A silencing range hood check valve, comprising a valve body, a valve core and an air outlet interface, the valve body comprising a bottom annular seat, a frustum-shaped body part, a top annular seat, a radial seat frame and a hinged seat arranged on the radial seat frame; the valve core comprising a semicircular core plate and a rotating shaft; characterized in that: The air outlet interface comprises an interface part, a connecting cavity and a sound attenuation pipe arranged at the bottom of the interface part, the diameter of the connecting cavity is larger than that of the interface part; the gap between the sound attenuation pipe and the interface part forms the exhaust pipe insertion slot of the range hood; the radius of the sound attenuation pipe is larger than that of the semicircular core plate; The connecting cavity is detachably connected with the top circular seat.

2. A sound attenuated exhaust fan check valve according to claim 1 wherein: The upper end of the sound attenuation pipe is provided with a tooth slot.

3. A sound attenuated exhaust fan check valve according to claim 1 wherein: The upper end surface of the sound attenuation pipe is arc-shaped and the upper end is wave-shaped.

4. The sound attenuated exhaust hood check valve of claim 1 wherein: The outer circumferential surface of the top circular seat is provided with a locking block. The inner wall of the connecting cavity is provided with a locking seat, and the locking seat is provided with an open-ended locking slot. The locking block is locked with the locking slot.

5. A sound attenuated exhaust fan check valve according to claim 4 wherein: An axial stop protrusion is arranged in the locking slot, and the locking block is arranged in the locking slot between the closed end of the locking slot and the axial stop protrusion.

6. A sound attenuating range hood check valve according to claims 1, 2, 3, 4 or 5, wherein: The upper end of the sound attenuation pipe is tapered.

7. A sound attenuating range hood check valve according to claims 1, 2, 3, 4 or 5, wherein: The tapered upper end of the sound attenuation pipe is spherical and tapered.

8. A sound attenuated exhaust fan check valve according to claim 1 wherein: The outer surface of the interface part is provided with an axial reinforcing plate and a connecting hole penetrating through the axial reinforcing plate and the interface part.

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