Round check valve and central air conditioning system

Abstract

The embodiment of the utility model relates to a circular check valve and a central air conditioning system. The circular check valve comprises a valve body, a baffle and blades. The valve body is provided with an overflowing channel; the baffle is arranged in the overflowing channel and is provided with an overflowing hole and a first mounting part; the baffle is provided with a first surface facing the ventilation direction and a second surface opposite to the ventilation direction. The blades are provided with second mounting parts, and the second mounting parts are rotationally connected with the first mounting parts; the blade is further provided with a first part and a second part, the second installation part is arranged between the first part and the second part, the first part and the second part are both arranged in the overflowing hole, and in the ventilation direction, the edge of the first part is used for covering the first surface, and the edge of the second part is used for covering the second surface. Due to the fact that the second installation portion of the blade is rotationally connected with the first installation portion of the baffle arranged in the overflowing channel of the valve body, a hole does not need to be additionally formed in the valve body for arranging a rotating shaft, and the defect that a hole needs to be formed in the valve body of a round check valve in the prior art is overcome.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the ventilation technical field of central air conditioning system, and particularly relates to a circular check valve and a central air conditioning system. BACKGROUND

[0002] The ventilation device is arranged in the central air conditioning system, and the ventilation device is equipment for ensuring that air can flow smoothly in the room. The circular check valve is arranged in the ventilation device, and the arrangement of the circular check valve is very important. The circular check valve can not only ensure that air can flow smoothly in the room, but also can effectively prevent air from flowing backward, so that the operation efficiency of the whole system is improved.

[0003] During the implementation of the present application, the applicant of the present application finds that in the prior art, the circular check valve is arranged on the valve body through a rotating shaft, and during the manufacturing of the check valve in the prior art, the rotating shaft is first punched on the valve body, and the blade is rotatably connected relative to the rotating shaft. That is, the circular check valve in the prior art needs to punch a hole on the valve body, which is easy to cause deformation of the valve body. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the embodiment of the present application provides a circular check valve and a central air conditioning system, which overcomes the above problems or at least partially solves the above problems.

[0005] According to one aspect of the embodiment of the present application, a circular check valve is provided, which comprises a valve body, a baffle and a blade. The valve body has a flow passage. The baffle is arranged in the flow passage, and the baffle has a flow hole and a first mounting portion. The baffle has a first surface facing a ventilation direction and a second surface facing away from the ventilation direction. The blade has a second mounting portion, and the second mounting portion is rotatably connected with the first mounting portion. The blade further has a first portion and a second portion, and the second mounting portion is arranged between the first portion and the second portion. The first portion and the second portion are both arranged in the flow hole. In the ventilation direction, an edge of the first portion is used to cover the first surface, and an edge of the second portion is used to cover the second surface.

[0006] In an optional mode, one end of the baffle is recessed to form a first stepped portion and a second stepped portion. The first stepped portion is provided with a first through hole, and the second stepped portion is provided with a second through hole. The first through hole and the second through hole are communicated to form the flow hole, and the second stepped portion extends to form the first mounting portion. The first portion is arranged in the first through hole, and the second portion is arranged in the second through hole. The edge of the first portion is used to cover the first surface in the region of the first stepped portion, and the edge of the second portion is used to cover the second surface in the region of the second stepped portion.

[0007] In an alternative, the second step portion extends to form the first mounting portion in the ventilation direction.

[0008] In an alternative, the second portion is staggered relative to the first portion, such that the first portion matches the first step portion and the second portion matches the second step portion; the second portion extends to form the second mounting portion.

[0009] In an alternative, the second portion extends to form the second mounting portion in the ventilation direction.

[0010] In an alternative, the circular check valve further comprises a linkage shaft, the linkage shaft penetrating the first mounting portion and the second mounting portion respectively.

[0011] In an alternative, the number of the first mounting portions is two, the two first mounting portions being spaced apart; the number of the second mounting portions is two, the two second mounting portions being spaced apart.

[0012] In an alternative, the circular check valve further comprises two clamping members, one end of the linkage shaft penetrating one of the second mounting portions, the first mounting portion in sequence and clamping to one of the clamping members, the other end of the linkage shaft penetrating the other of the second mounting portions, the first mounting portion in sequence and clamping to the other of the clamping members.

[0013] In an alternative, the linkage shaft is provided with two clamping grooves, one of the clamping members clamping to one of the clamping grooves.

[0014] According to an aspect of the embodiments of the present application, there is provided a central air conditioning system, comprising the circular check valve.

[0015] The beneficial effects of the embodiments of the present application include: a circular check valve is provided, comprising a valve body, a baffle and a vane; the valve body has a flow passage; the baffle is arranged in the flow passage, the baffle has a flow hole, and the baffle has a first mounting portion; the baffle has a first surface facing a ventilation direction and a second surface facing away from the ventilation direction; the vane has a second mounting portion, which is rotationally connected with the first mounting portion; the vane further has a first portion and a second portion, the second mounting portion is arranged between the first portion and the second portion, and the first portion and the second portion are both arranged in the flow hole; in the ventilation direction, an edge of the first portion is used to cover the first surface, and an edge of the second portion is used to cover the second surface. Through the circular check valve, wind blows to the vane along the ventilation direction, the vane rotates with the wind, the flow hole is exposed to make the wind pass through; when the wind stops, the second portion in the vane rotates against the ventilation direction to make the edge of the second portion cover the second surface and the edge of the first portion cover the first surface, thereby achieving check. In addition, since the second mounting portion of the vane is rotationally connected with the first mounting portion of the baffle arranged in the flow passage of the valve body, a rotating shaft does not need to be additionally arranged on the valve body, thereby overcoming the defect that the circular check valve in the prior art needs to be opened on the valve body. BRIEF DESCRIPTION OF DRAWINGS

[0016] One or more embodiments are illustrated by way of example in the figures that are part of this disclosure and which are illustrative, but not restrictive, of the present embodiments, wherein elements having the same reference number designates like elements throughout the various figures, and wherein the figures do not necessarily bear a proportional relationship to each other.

[0017] Figure 1 is a schematic view of a circular check valve provided by an embodiment of the present application;

[0018] Figure 2 is a schematic view of a circular check valve provided by an embodiment of the present application; Figure 1 is a sectional view along P of the above-mentioned circular check valve;

[0019] Figure 3 is a schematic view of a valve body provided by an embodiment of the present application;

[0020] Figure 4 is a schematic view of a baffle provided by an embodiment of the present application;

[0021] Figure 5 is a schematic view of a vane provided by an embodiment of the present application;

[0022] Figure 6 is a schematic view of a circular check valve provided by an embodiment of the present application, in another direction;

[0023] Figure 7 is a schematic view of a circular check valve provided by an embodiment of the present application, in another direction;Figure 6 Enlarged view of middle A part;

[0024] Figure 8 is a schematic view of the inner ring pipe provided by the embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present application, the present application will be described in more detail below in combination with the drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right", "inner", "outer" and similar expressions used in the present specification are only for the purpose of illustration.

[0026] Unless otherwise defined, all technical and scientific terms used in the present specification are the same as the meanings commonly understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used in the present specification includes any and all combinations of one or more related listed items.

[0027] Please refer to Figure 1 and Figure 2 The embodiment of the present application provides a circular check valve 100, which comprises a valve body 10, a baffle 20, a vane 30, a linkage shaft 40, a clamping piece 50, an inner ring pipe 60 and a flange 70. The baffle 20, the vane 30, the linkage shaft 40, the clamping piece 50 and the inner ring pipe 60 are all arranged in the valve body 10, the flange 70 is annularly arranged on the valve body 10, and the flange 70 is used for mounting the circular check valve 100 on an external device. The vane 30 is rotationally connected to the baffle 20 through the linkage shaft 40, the clamping piece 50 is clamped between the linkage shaft 40 and the baffle 20, and the inner ring pipe 60 abuts against the baffle 20. Through the circular check valve 100, wind blows to the vane 30 along a ventilation direction D1, the vane 30 rotates with the wind, air can pass through the valve body 10, and when the wind stops, the vane 30 reversely rotates to achieve check.

[0028] It is worth noting that the linkage shaft 40, the clamping piece 50, the inner ring pipe 60 and the flange 70 can also not be arranged, and the application purpose of the embodiment of the present application can also be achieved.

[0029] For the valve body 10 and the flange 70 described above, please refer to Figure 2 and Figure 3Valve body 10 is provided with flow passage 10s, and valve body 10 is formed in a cylindrical shape. Flange 70 is arranged around valve body 10, and valve body 10 can be installed on an external device through flange 70.

[0030] In some embodiments, mounting ring 11 is arranged on valve body 10 in a radial direction away from flow passage 10s, and flange 70 is arranged on mounting ring 11.

[0031] It is worth noting that flange 70 can be arranged on mounting ring 11 by welding.

[0032] It is worth noting that in some embodiments, the number of flanges 70 is two, and the number of mounting rings 11 is two. In the axial direction of flow passage 10s, two mounting rings 11 are arranged at both ends of valve body 10, and one flange 70 is arranged on one mounting ring 11.

[0033] For the above-mentioned baffle 20, please refer to Figure 2 and Figure 4 Baffle 20 is arranged in flow passage 10s, and baffle 20 has flow hole 20a for air to pass through and first mounting portion 21 for rotary mounting of blade 30. Baffle 20 has first surface 201 facing ventilation direction D1 and second surface 202 facing away from ventilation direction D1.

[0034] It is worth noting that in some embodiments, baffle 20 is fixed to valve body 10 by welding.

[0035] In some embodiments, one end of baffle 20 is recessed to form first step portion 22 and second step portion 23; first step portion 22 is provided with first through hole 22s, second step portion 23 is provided with second through hole 23s, first through hole 22s and second through hole 23s are connected to form flow hole 20a, and second step portion 23 extends to form first mounting portion 21.

[0036] It is worth noting that in some embodiments, second step portion 23 extends to form first mounting portion 21 facing ventilation direction D1, which facilitates the rotary mounting of blade 30 on first mounting portion 21.

[0037] For the above-mentioned blade 30, please refer to Figure 2 , Figure 4 and Figure 5, the blade 30 comprises a first part 31, a second part 32 and a second mounting part 33, the second mounting part 33 is arranged between the first part 31 and the second part 32, the first part 31 and the second part 32 are arranged in the flow hole 20a, in particular, the first part 31 is arranged in the first through hole 22s, and the second part 32 is arranged in the second through hole 23s; along the ventilation direction D1, the edge of the first part 31 is used to cover the first surface 201 of the baffle plate 20, in particular, the edge of the first part 31 is used to cover the area of the first surface 201 located in the first step part 22; the edge of the second part 32 is used to cover the second surface 202 of the baffle plate 20, in particular, the edge of the second part 32 is used to cover the area of the second surface 202 located in the second step part 23; the second mounting part 33 is rotationally connected with the first mounting part 21 of the baffle plate 20. Through the above arrangement, the wind blows to the blade 30 along the ventilation direction D1, the blade 30 rotates with the wind, and the flow hole 20a is exposed to make the wind pass through; when the wind stops, the second part 32 in the blade 30 rotates against the ventilation direction D1, so that the edge of the second part 32 covers the second surface 202 and the edge of the first part 31 covers the first surface 201, realizing the check valve. In addition, since the second mounting part 33 of the blade 30 is rotationally connected with the first mounting part 21 of the baffle plate 20 arranged in the flow channel 10s of the valve body 10, it is not necessary to additionally open a hole in the valve body 10 to arrange a rotating shaft, overcoming the defect that the circular check valve 100 in the prior art needs to open a hole in the valve body 10.

[0038] It is worth noting that in some embodiments, the second part 32 is arranged staggered relative to the first part 31, so that the first part 31 matches the first step part 22, and the second part 32 matches the second step part 23; the second part 32 extends to form the second mounting part 33.

[0039] It is worth noting that in some embodiments, the second part 32 extends to form the second mounting part 33 facing the ventilation direction D1, through the above arrangement, the second mounting part 33 of the blade 30 is rotationally connected with the first mounting part 21 of the baffle plate 20.

[0040] It is worth mentioning that in some embodiments, when the edge of the second part 32 is covered on the second surface 202, the second part 32 is arranged to be inclined relative to the valve body 10, and the included angle a between the second part 32 and the axis of the flow passage 10s is an acute angle. Through the arrangement that when the edge of the second part 32 of the vane 30 is covered on the second surface 202, the second part 32 is arranged to be inclined relative to the valve body 10, and the included angle a between the second part 32 and the axis of the flow passage 10s is an acute angle, under the action of gravity, the gravity G of the second part 32 has a force component G1 on the baffle 20, which can tightly cover the second part 32 of the vane 30 on the baffle 20 and improve the sealing between the vane 30 and the baffle 20. That is, by arranging the second part 32 to be inclined, compared with the prior art in which the vane 30 is perpendicular to the axis of the flow passage 10s of the valve body 10, the force of the vane 30 on the baffle 20 is almost zero, and the present application increases the force component G1 of the second part 32 of the vane 30 on the baffle 20 to improve the sealing between the vane 30 and the baffle 20.

[0041] It is worth mentioning that in some embodiments, the included angle a between the second part 32 and the axis of the flow passage 10s is between 70 degrees and 85 degrees.

[0042] It is worth mentioning that in some embodiments, in the direction perpendicular to the vane 30, the area of the second part 32 is greater than the area of the first part 31, that is, the gravity of the second part 32 is greater than the gravity of the first part 31, and the second mounting part 33 is arranged eccentrically, so as to facilitate the edge of the second part 32 of the vane 30 to cover the second surface 202.

[0043] It is worth mentioning that in some embodiments, when the edge of the first part 31 is covered on the first surface 201, the first part 31 is arranged to be inclined relative to the valve body 10, and the included angle b between the first part 31 and the axis of the flow passage 10s is an obtuse angle. Therefore, when the edge of the second part 32 of the vane 30 is tightly covered on the second surface 202, it is convenient for the edge of the first part 31 of the vane 30 to be tightly covered on the first surface 201.

[0044] It is worth mentioning that since when the edge of the second part 32 of the vane 30 is covered on the second surface 202 of the baffle 20, the second part 32 is arranged to be inclined relative to the valve body 10, and the included angle a between the second part 32 and the axis of the flow passage 10s is an acute angle, in order to adapt to the second part 32 of the vane 30, the second step part 23 of the baffle 20 is arranged to be inclined relative to the valve body 10, and the included angle between the second step part 23 and the axis of the flow passage 10s is an acute angle.

[0045] It is worth mentioning that, since the edge cover of the first part 31 is arranged on the first surface 201, the first part 31 is arranged obliquely relative to the valve body 10, and the included angle b between the first part 31 and the axis of the flow passage 10s is obtuse. In order to adapt to the first part 31 of the leaf 30, the first step part 22 of the baffle 20 is arranged obliquely relative to the valve body 10, and the included angle between the first step part 22 and the axis of the flow passage 10s is obtuse.

[0046] It is worth mentioning that, in some embodiments, the thickness of the leaf 30 and the baffle has a thickness difference. When the pressure of the ventilation pipe connected with the valve body 10 exceeds 300 Pa, the circular check valve 100 can achieve the state of zero leakage, anti-backflow, and flexible opening and closing of the leaf 30.

[0047] For the above-mentioned linkage shaft 40, please refer to Figure 6 and Figure 7 The linkage shaft 40 penetrates the first mounting part 21 and the second mounting part 33 respectively, and the linkage shaft 40 realizes the rotational connection of the leaf 30 relative to the baffle 20.

[0048] It is worth mentioning that, in some embodiments, the number of the first mounting part 21 of the baffle 20 is two, and the two first mounting parts 21 are arranged at intervals. The number of the second mounting part 33 of the leaf 30 is two, and the two second mounting parts 33 are arranged at intervals. One end of the linkage shaft 40 penetrates the second mounting part 33 and the first mounting part 21 in turn, and the other end of the linkage shaft 40 penetrates the second mounting part 33 and the first mounting part 21 in turn. Through this arrangement, the stability of the rotational connection of the leaf 30 relative to the baffle 20 is increased.

[0049] For the above-mentioned clamping piece 50, please refer to Figure 6 and Figure 7 The number of the clamping piece 50 is two, one end of the linkage shaft 40 penetrates the second mounting part 33 and the first mounting part 21 in turn and is clamped in one of the clamping pieces 50, and the other end of the linkage shaft 40 penetrates the second mounting part 33 and the first mounting part 21 in turn and is clamped in the other clamping piece 50.

[0050] It is worth mentioning that, in some embodiments, the linkage shaft 40 is provided with two clamping grooves 41, and one clamping piece 50 is clamped in one clamping groove 41.

[0051] It is worth mentioning that, in some embodiments, the clamping piece 50 is a clamping spring.

[0052] For the above-mentioned inner ring pipe 60, please refer toFigure 2 and Figure 8 The inner ring pipe 60 is sleeved on the flow passage 10s, and the inner ring pipe 60 abuts against the first surface 201 of the baffle 20. By arranging the inner ring pipe 60, the arrangement position of the baffle 20 in the flow passage 10s is limited.

[0053] It can be understood that the end of the inner ring pipe 60 abutting against the first surface 201 is adapted to the shape of the baffle 20.

[0054] It should be noted that in some embodiments, the material thickness of the blade 30 can be selected according to the size of the wind speed in the ventilation duct connected with the valve body 10 and the size of the circular check valve 100, and the angle of the inner ring pipe 60 is correspondingly selected according to the material thickness of the blade 30.

[0055] In the embodiments of the present application, the circular check valve 100 includes a valve body 10, a baffle 20, a blade 30, a linkage shaft 40, a clamping piece 50, an inner ring pipe 60 and a flange 70. The valve body 10 is provided with a flow passage 10s, the baffle 20, the blade 30, the linkage shaft 40, the clamping piece 50 and the inner ring pipe 60 are arranged in the flow passage 10s, and the flange 70 is annularly arranged on the valve body 10, and the flange 70 is used for mounting the circular check valve 100 on an external device. The second mounting portion 33 of the blade 30 is rotationally connected with the first mounting portion 21 of the baffle 20 through the linkage shaft 40, the clamping piece 50 is clamped between the linkage shaft 40 and the baffle 20, and the inner ring pipe 60 abuts against the baffle 20. Through the circular check valve 100, the wind blows to the blade 30 along the ventilation direction D1, the blade 30 rotates with the wind, the wind can pass through the valve body 10, and when the wind stops, the blade 30 reversely rotates, and the check function can be realized.

[0056] The embodiments of the present application also provide an embodiment of a central air conditioning system, and the central air conditioning system includes the circular check valve 100. For the specific structure and functions of the circular check valve 100, refer to the above embodiments, and details are not described herein.

[0057] It should be noted that the specification and drawings of the present application give the preferred embodiments of the present application, but the present application can be implemented in many different forms, and is not limited to the embodiments described in the specification, and the embodiments are not additional limitations on the content of the present application, and the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Furthermore, the above technical features continue to be combined with each other, forming various embodiments not listed above, which are considered to be within the scope of the present application. Furthermore, those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes should be within the protection scope of the claims of the present application.

Claims

1. A circular check valve, characterized in that, include: Valve body, baffle, blade; The valve body has a flow passage; The baffle is disposed in the flow channel, the baffle has a flow hole, and the baffle has a first mounting part; The baffle has a first surface facing the ventilation direction and a second surface facing away from the ventilation direction; The blade has a second mounting portion, which is rotatably connected to the first mounting portion. The blade also has a first part and a second part, and the second mounting part is disposed between the first part and the second part. Both the first part and the second part are disposed in the flow hole. Along the ventilation direction, the edge of the first part is used to cover the first surface, and the edge of the second part is used to cover the second surface.

2. The circular check valve according to claim 1, characterized in that, One end of the baffle is recessed to form a first step portion and a second step portion; The first stepped portion is provided with a first through hole, and the second stepped portion is provided with a second through hole. The first through hole and the second through hole are connected to form the flow hole, and the second stepped portion extends to form the first mounting portion. The first part is disposed in the first through hole, and the second part is disposed in the second through hole; The edge of the first part is used to cover the area of ​​the first surface located at the first step portion, and the edge of the second part is used to cover the area of ​​the second surface located at the second step portion.

3. The circular check valve according to claim 2, characterized in that, The second stepped portion extends towards the ventilation direction to form the first mounting portion.

4. The circular check valve according to claim 2, characterized in that, The second part is staggered relative to the first part, so that the first part matches the first step part, and the second part matches the second step part; The second part extends to form the second mounting part.

5. The circular check valve according to claim 4, characterized in that, The second part extends in the ventilation direction to form the second mounting part.

6. The circular check valve according to any one of claims 1-5, characterized in that, The circular check valve also includes a linkage shaft, which passes through the first mounting part and the second mounting part respectively.

7. The circular check valve according to claim 6, characterized in that, The number of first mounting parts is two, and the two first mounting parts are arranged at intervals. The number of second mounting parts is two, and the two second mounting parts are arranged at intervals.

8. The circular check valve according to claim 7, characterized in that, The circular check valve also includes two snap-fit ​​components. One end of the linkage shaft passes through one of the second mounting parts and the first mounting part in sequence and is snapped into one of the snap-fit ​​components. The other end of the linkage shaft passes through the other second mounting part and the first mounting part in sequence and is snapped into the other snap-fit ​​component.

9. The circular check valve according to claim 8, characterized in that, The linkage shaft is provided with two snap-fit ​​slots, and one of the snap-fit ​​components snaps into one of the snap-fit ​​slots.

10. A central air conditioning system, characterized in that, Includes the circular check valve as described in any one of claims 1-9.

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