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; the baffle is provided with a first surface facing the ventilation direction and a second surface opposite to the ventilation direction. The blades are rotationally connected with the baffles; the blade is provided with a first part and a second part, the first part and the second part are both arranged in the overflowing hole, 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 in the ventilation direction; when the edge of the second part covers the second surface, the second part is obliquely arranged relative to the valve body, and the included angle between the second part and the axis of the flow passage is an acute angle, so that under the action of gravity, the gravity of the second part has an acting force component on the baffle, and the acting force component can tightly cover the second part of the blade on the baffle; and the sealing performance between the blades and the baffle is improved.

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 as to improve the operation efficiency of the whole system.

[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 in the valve body through a rotating shaft, the valve body is provided with an overflow passage, a baffle is arranged in the overflow passage and used for stopping the blade to realize check. However, when the blade is stopped by the baffle, the blade is arranged perpendicularly relative to the axis of the overflow passage, at this time, under the action of gravity, the force component of the blade on the baffle is almost zero, and the sealing performance between the blade and the baffle is poor. 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 an overflow passage. The baffle is arranged in the overflow passage, and the baffle has an overflow hole. The baffle has a first surface facing a ventilation direction and a second surface facing away from the ventilation direction. The blade is rotationally connected with the baffle. The blade has a first part and a second part, and the first part and the second part are arranged in the overflow hole. 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. When the edge of the second part covers the second surface, the second part is arranged obliquely relative to the valve body, and the included angle between the second part and the axis of the overflow passage is an acute angle.

[0006] In an optional mode, when the edge of the first part covers the first surface, the first part is arranged obliquely relative to the valve body, and the included angle between the first part and the axis of the overflow passage is an obtuse angle.

[0007] In an alternative mode, one end of the baffle is recessed to form a first step portion and a second step portion; the first step portion is provided with a first through hole, the second step portion is provided with a second through hole, and the first through hole and the second through hole are communicated to form the flow passage; 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 area of the first surface located at the first step portion, and the edge of the second portion is used to cover the area of the second surface located at the second step portion.

[0008] In an alternative mode, the second step portion is arranged obliquely relative to the valve body, and the included angle between the second step portion and the axis of the flow passage is an acute angle.

[0009] In an alternative mode, the first step portion is arranged obliquely relative to the valve body, and the included angle between the first step portion and the axis of the flow passage is an obtuse angle.

[0010] In an alternative mode, the circular check valve further comprises an inner ring pipe, the inner ring pipe is sleeved on the flow passage, and the inner ring pipe abuts against the first surface.

[0011] In an alternative mode, the baffle has a first mounting portion, the vane has a second mounting portion, the second mounting portion is located between the first portion and the second portion, and the second mounting portion is rotationally connected with the first mounting portion.

[0012] In an alternative mode, the circular check valve further comprises a linkage shaft, the linkage shaft penetrates through the first mounting portion and the second mounting portion respectively.

[0013] In an alternative mode, the circular check valve further comprises a flange, and the flange is annularly arranged on the valve body.

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

[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 blade; the valve body has a flow passage; the baffle is arranged in the flow passage, and the baffle has a flow hole; the baffle has a first surface facing a ventilation direction and a second surface facing away from the ventilation direction; the blade is rotationally connected with the baffle; the blade has a first part and a second part, both of which are arranged in the flow hole, and the edge of the first part is used to cover the first surface along the ventilation direction, and the edge of the second part is used to cover the second surface; when the edge of the second part covers the second surface, the second part is arranged to be inclined relative to the valve body, and the included angle between the second part and the axis of the flow passage is an acute angle. Through the circular check valve, the wind blows to the blade along the ventilation direction, the blade rotates with the wind, the flow hole is exposed, and the wind passes through; when the wind stops, the second part of the blade rotates against the ventilation direction, so that the edge of the second part covers the second surface and the edge of the first part covers the first surface, and the check is realized. In addition, since the edge of the second part of the blade covers the second surface, the second part is arranged to be inclined relative to the valve body, and the included angle between the second part and the axis of the flow passage is an acute angle, so that under the action of gravity, the gravity of the second part has a force component on the baffle, which can tightly cover the second part of the blade on the baffle, and improve the sealing between the blade and the baffle. 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 the same elements. The figures of the drawings are not to scale and the figures are provided for the purpose of best disclosing the present embodiments and do not purport to limit the scope of the present embodiments.

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

[0018] Figure 2 is a schematic view of a baffle provided by the embodiments of the present application; Figure 1 is a sectional view along P of the above-mentioned baffle;

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

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

[0021] Figure 5 is a schematic view of a blade provided by the embodiments of the present application;

[0022] Figure 6This is a schematic diagram of the circular check valve provided in an embodiment of this application from another direction;

[0023] Figure 7 This is provided by the embodiments of this application. Figure 6 Enlarged view of section A in the middle;

[0024] Figure 8 This is a schematic diagram of the inner ring pipe provided in an embodiment of this application. Detailed Implementation

[0025] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0027] Please see Figure 1 and Figure 2 This application provides a circular check valve 100, which includes a valve body 10, a baffle 20, a blade 30, a linkage shaft 40, a snap-fit ​​component 50, an inner ring pipe 60, and a flange 70. The baffle 20, blade 30, linkage shaft 40, snap-fit ​​component 50, and inner ring pipe 60 are all disposed within the valve body 10. The flange 70 is circumferentially disposed within the valve body 10 and is used for mounting the circular check valve 100 to external equipment. The blade 30 is rotatably connected to the baffle 20 via the linkage shaft 40. The snap-fit ​​component 50 is snapped between the linkage shaft 40 and the baffle 20. The inner ring pipe 60 abuts against the baffle 20. Through the circular check valve 100, air is blown towards the blade 30 along the ventilation direction D1. The blade 30 rotates with the airflow, allowing air to pass through the valve body 10. When the airflow stops, the blade 30 rotates in the reverse direction, achieving check valve operation.

[0028] It is worth noting that the linkage shaft 40, snap-fit ​​component 50, inner ring pipe 60, and flange 70 may also be omitted, and the purpose of this application embodiment can still be achieved.

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

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

[0031] It is worth noting that the flange 70 can be arranged on the 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. Along the axial direction of the flow passage 10s, the two mounting rings 11 are arranged at both ends of the valve body 10, and one flange 70 is arranged on one mounting ring 11.

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

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

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

[0036] It is worth noting that in some embodiments, the second step portion 23 extends to form the first mounting portion 21 facing the ventilation direction D1, and through this arrangement, the blade 30 is rotatably mounted on the first mounting portion 21.

[0037] For the blade 30 described above, 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 at 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 at 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 with respect 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, there is a thickness difference between the leaf 30 and the baffle, and when the pressure in the ventilation pipeline connected to the valve body 10 exceeds 300 Pa, the circular check valve 100 can achieve a 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 through the linkage shaft 40, the rotation connection of the leaf 30 relative to the baffle 20 is realized.

[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 rotation 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 to 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 to 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 to 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, wind blows to the blade 30 along a ventilation direction D1, the blade 30 rotates with the wind, air can pass through the valve body 10, and when the wind stops, the blade 30 reversely rotates, so that 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 by, The valve body, the baffle, the vane; The valve body has a flow passage; The baffle is arranged in the flow passage, and the baffle has a flow hole; The baffle has a first surface facing the ventilation direction and a second surface facing away from the ventilation direction; The vane is rotationally connected with the baffle; The vane has a first part and a second part, both of which are arranged in the flow hole, and the edge of the first part is used to cover the first surface in the ventilation direction, and the edge of the second part is used to cover the second surface; When the edge of the second part covers the second surface, the second part is arranged obliquely relative to the valve body, and the included angle between the second part and the axis of the flow passage is an acute angle. When the edge of the first part covers the first surface, the first part is arranged obliquely relative to the valve body, and the included angle between the first part and the axis of the flow passage is an obtuse angle.

2. The circular check valve of claim 1, wherein 3. The circular check valve according to claim 1, wherein One end of the baffle is recessed to form a first step portion and a second step portion; The first step portion is provided with a first through hole, and the second step portion is provided with a second through hole, and the first through hole and the second through hole are communicated to form the flow hole; The first part is arranged in the first through hole, and the second part is arranged in the second through hole; The edge of the first part is used to cover the first surface in the region of the first step portion, and the edge of the second part is used to cover the second surface in the region of the second step portion. The second step portion is arranged obliquely relative to the valve body, and the included angle between the second step portion and the axis of the flow passage is an acute angle.

4. The circular check valve of claim 3, wherein The first step portion is arranged obliquely relative to the valve body, and the included angle between the first step portion and the axis of the flow passage is an obtuse angle.

5. The circular check valve of claim 4, wherein, The circular check valve further comprises an inner ring pipe, the inner ring pipe is sleeved on the flow passage, and the inner ring pipe abuts against the first surface.

6. The circular check valve according to any one of claims 1 to 5, wherein The baffle has a first mounting portion, the vane has a second mounting portion, the second mounting portion is located between the first part and the second part, and the second mounting portion is rotationally connected with the first mounting portion.

7. The circular check valve according to any one of claims 1-5, wherein The circular check valve further comprises a linkage shaft, the linkage shaft penetrates the first mounting portion and the second mounting portion respectively.

8. The circular check valve of claim 7, wherein, The circular check valve further comprises a flange, and the flange is annularly arranged on the valve body.

9. The circular check valve according to any one of claims 1-5, wherein The circular check valve comprises the circular check valve according to any one of claims 1-9.

10. A central air conditioning system, characterized by, ​

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