Ventilation pipeline and air conditioning equipment

Abstract

The invention discloses a ventilation pipeline and air conditioning equipment, and belongs to the technical field of air conditioning. The ventilation pipeline comprises a first shell, the first shell is of a tubular structure, the first shell is provided with a first end, a second end and a transition part, the transition part is located between the first end and the second end, the sectional area of the first shell is gradually reduced from the first end to the transition part, and the sectional area of the first shell is gradually increased from the transition part to the second end; the cross section is perpendicular to the ventilation direction. The structure of the first shell can restrain the vortex and flow separation phenomenon in the ventilation pipeline, so that the resistance of the ventilation pipeline is reduced, and the air inlet and outlet volume of the ventilation pipeline is increased.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air conditioning, and particularly to a ventilation duct and an air conditioning device. Background Art

[0002] A heat pump is a device that transfers the heat energy of a low-temperature heat source to a high-temperature heat source. For example, an air-source heat pump, a ground-source heat pump, etc. It uses renewable resources to achieve the purpose of temperature control, and has significant energy-saving effects and is widely used.

[0003] In the related art, the outer ventilation duct of an air conditioning device such as an air-source heat pump uses a circular pipe with a constant diameter, resulting in vortices in the pipe, large flow resistance of the fluid, and less air inflow and outflow. Summary of the Invention

[0004] Embodiments of the present disclosure provide a ventilation duct and an air conditioning device, which can solve the above technical problems existing in the related art. The technical solutions are as follows:

[0005] In a first aspect, the present disclosure provides a ventilation duct, and the ventilation duct includes a first housing;

[0006] The first housing has a tubular structure, the first housing has a first end, a second end, and a transition portion, the transition portion is located between the first end and the second end, the cross-sectional area of the first housing gradually decreases from the first end to the transition portion, and the cross-sectional area of the first housing gradually increases from the transition portion to the second end. The cross-section is a cross-section perpendicular to the ventilation direction.

[0007] Optionally, the ventilation duct further includes a second housing, the second housing has a tubular structure, the second housing has a third end and a fourth end, the second housing is sleeved outside the first housing, the third end is connected to the first end, and the fourth end is connected to the second end.

[0008] Optionally, the lengths of the first housing and the second housing in the ventilation direction are equal.

[0009] Optionally, the first housing further has a plurality of through holes, and the through holes are located on the side wall of the first housing.

[0010] Optionally, there is a cavity between the first housing and the second housing.

[0011] Optionally, the inner wall of the first housing has a first region, a second region, a third region, and a fourth region arranged circumferentially. The second region is adjacent to the first region and the fourth region, and the third region is adjacent to the first region and the fourth region. The distance from a point in the first region to the second housing is positively correlated with the distance to the first end. The distance from a point in the second region to the second housing is positively correlated with the distance to the first end and negatively correlated with the distance to the first region. The distance from a point in the third region to the second housing is positively correlated with the distance to the first end and negatively correlated with the distance to the first region. The distances from the points in the fourth region to the second housing are all equal.

[0012] Optionally, the inner wall of the first housing has a fifth region, a sixth region, a seventh region, and an eighth region arranged circumferentially. The sixth region is adjacent to the fifth region and the eighth region, and the seventh region is adjacent to the fifth region and the eighth region. The distance from a point in the fifth region to the second housing is positively correlated with the distance to the second end. The distance from a point in the sixth region to the second housing is positively correlated with the distance to the second end and negatively correlated with the distance to the fifth region. The distance from a point in the seventh region to the second housing is positively correlated with the distance to the second end and negatively correlated with the distance to the fifth region. The distances from the points in the eighth region to the second housing are all equal.

[0013] Optionally, the distance between the transition part and the first end in the ventilation direction is 10% - 40% of the length of the first housing in the ventilation direction.

[0014] Optionally, the pipe diameter of the transition part is 60% - 95% of the pipe diameter of the first end.

[0015] Optionally, the inner surface of the first housing is smooth and has no sharp corners.

[0016] In a second aspect, the present disclosure provides an air conditioning device, and the air conditioning device includes the ventilation duct described in any one of the first aspects.

[0017] The beneficial effects brought by the technical solutions provided in the embodiments of the present disclosure at least include:

[0018] In the embodiments of the present disclosure, the first housing has a tubular structure. The cross-sectional area (the cross-section perpendicular to the ventilation direction) of the first housing gradually decreases from the first end to the transition part and gradually increases from the transition part to the second end. The structure of the first housing can suppress the generation of vortex and flow separation phenomena in the ventilation duct, thereby reducing the resistance of the ventilation duct and increasing the air volume of the inlet and outlet of the ventilation duct.

[0019] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a schematic cross-sectional view of a ventilation duct provided by an embodiment of the present disclosure;

[0022] Figure 2 is a schematic cross-sectional view of another ventilation duct provided by an embodiment of the present disclosure;

[0023] Figure 3 is a partial cross-sectional view of a ventilation duct provided by an embodiment of the present disclosure;

[0024] Figure 4 is a front view of an air conditioning device provided by an embodiment of the present disclosure;

[0025] Figure 5 is a schematic structural view of a ventilation duct provided by an embodiment of the present disclosure;

[0026] Figure 6 is a partial cross-sectional view of an air conditioning device provided by an embodiment of the present disclosure;

[0027] Figure 7 is a partial cross-sectional view of another air conditioning device provided by an embodiment of the present disclosure;

[0028] Figure 8 is a schematic cross-sectional view of yet another ventilation duct provided by an embodiment of the present disclosure.

[0029] Reference Numerals:

[0030] First housing 1, first end 11, second end 12, transition part 13, through hole 1a, first area 101, second area 102, third area 103, fourth area 104, fifth area 105, sixth area 106, seventh area 107, eighth area 108;

[0031] Second housing 2, third end 21, fourth end 22;

[0032] Cavity 3, connecting rib 30, air conditioning device 4, device body 40, ventilation duct 41. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In order to make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the drawings.

[0034] An embodiment of the present disclosure provides a ventilation duct 41 for an air conditioning device 4. The ventilation duct 41 may include a first housing 11, and the ventilation duct 41 is connected to the device body 40.

[0035] The present disclosure does not specifically limit the number of the ventilation ducts 41. Without special instructions, the following takes two ventilation ducts 41 as an example. When the number of the ventilation ducts 41 is two, one is an air inlet duct and the other is an air outlet duct.

[0036] The following separately introduces each component of the ventilation duct 41:

[0037] I. The first housing 1

[0038] In some embodiments, referring to Figure 1 shown, Figure 1 is a cross-sectional schematic diagram of a ventilation duct provided by an embodiment of the present disclosure. The first housing 1 has a tubular structure, and the first housing 1 has a first end 11, a second end 12, and a transition part 13.

[0039] The present disclosure does not specifically limit the material of the first housing 1, which may be metal, plastic, ceramic, etc. Without special instructions, taking the first housing 1 as a rigid anti-corrosion plastic as an example, the first housing 1 made of a rigid material can avoid damage to the inner wall of the first housing 1 caused by solid foreign matters carried in the external gas; the first housing 1 made of an anti-corrosion material can avoid corrosion of the inner wall of the first housing 1 caused by liquid foreign matters carried in the external gas, which may further lead to damage to the first housing 1.

[0040] In some embodiments, referring to Figure 1 and Figure 2 shown, the inner surface of the first housing 1 is smooth and has no sharp corners.

[0041] The smooth and sharp-corner-free inner surface can further reduce the flow resistance of the tubular structure of the first housing 1, well adapt to the change of the flow field in the tubular structure of the first housing 1, and can avoid the sharp deflection of the local flow direction of the fluid in the tubular structure, thereby affecting the flow rate of the fluid.

[0042] The shape of the side line of the cross-section of the first housing 1 along the ventilation direction can be a body contour curve of a carangid fish. Its horizontal contour is a structure similar to a semi-ellipse and semi-parabola. This streamline structure can well adapt to the change of the flow field, realize the control of the surrounding vortices, prevent flow separation from occurring, reduce the flow resistance and flow loss, and at the same time can also reduce the aerodynamic noise.

[0043] 1.1 The first end 11 and the second end 12

[0044] The cross-sectional area of the first housing 1 gradually decreases from the first end 11 to the transition part 13, and gradually increases from the transition part 13 to the second end 12. The cross-section is a cross-section perpendicular to the ventilation direction.

[0045] The cross-sectional area of the first housing 1 first decreases and then increases from the first end 11 to the second end 12. The first end 11 is one end of the tubular structure for gas to enter the first housing 1, and the second end 12 is the end for gas to flow out of the tubular structure of the first housing 1. The change in the cross-sectional area of the first housing 1 can, to a certain extent, inhibit the generation of vortices in the tubular structure, reduce the pipeline resistance of the first housing 1, and increase the gas flow rate in and out of the first housing 1.

[0046] 1.2 Transition part 13

[0047] The transition part 13 is located between the first end 11 and the second end 12. The cross-sectional area of the first housing 1 gradually decreases from the first end 11 to the transition part 13, and gradually increases from the transition part 13 to the second end 12. That is, the transition part 13 is the part with the smallest cross-sectional area of the first housing 1.

[0048] In some embodiments, referring to Figure 2 shown, Figure 2 is a schematic cross-sectional view of another ventilation duct provided by an embodiment of the present disclosure. The distance between the transition part 13 and the first end 11 in the ventilation direction is 10% - 40% of the length of the first housing 1 along the ventilation direction.

[0049] When the ventilation duct 41 is an air inlet duct, the distance between the transition part 13 and the first end 11 in the ventilation direction is S, and the length of the first housing 1 along the ventilation direction is L. Preferably, S = 0.3L; when S = 0.3L, the fluid resistance of the tubular structure of the first housing 1 of the air inlet duct is the smallest, and the increased air inlet volume is the maximum value.

[0050] When the ventilation duct 41 is an air outlet duct, the distance between the transition part 13 and the first end 11 in the ventilation direction is S, and the length of the first housing 1 along the ventilation direction is L. Preferably, S = 0.25L; when S = 0.25L, the fluid resistance of the tubular structure of the first housing 1 of the air outlet duct is the smallest, and the increased air outlet volume is the maximum value.

[0051] In some embodiments, referring to Figure 2 shown, the diameter of the transition part 13 is 60% - 95% of the diameter of the first end 11.

[0052] When the ventilation duct 41 is an air inlet duct, the diameter of the transition part 13 is d, and the distance from a point on the transition part 13 to the second housing 2 from the first housing 1 is H. Preferably, the values are d = 0.85D and H = 0.075D. When d = 0.85D, the fluid resistance of the tubular structure of the first housing 1 of the air inlet duct is the smallest, and the increased air inlet volume is the maximum value.

[0053] When the ventilation duct 41 is an air outlet duct, the diameter of the transition part 13 is d, and the distance from the first housing 1 to the second housing 2 is H. Preferably, the values are d = 0.8D and H = 0.1D. When d = 0.8D, the fluid resistance of the tubular structure of the first housing 1 of the air outlet duct is the smallest, and the increased air outlet volume is the maximum value.

[0054] 1.3 Through hole 1a

[0055] In some embodiments, referring to Figure 3 as shown, Figure 3 is a partial cross-sectional view of a ventilation duct provided by an embodiment of the present disclosure. The first housing 1 further has a plurality of through holes 1a, and the through holes 1a are located on the side wall of the first housing 1.

[0056] When the ventilation duct 41 is an air inlet duct, the second end 12 of the first housing 1 is connected to the equipment body 40, and the first end 11 of the first housing 1 faces the external environment. Since the flow direction of the gas changes multiple times inside the equipment body 40, the pneumatic noise is mainly generated inside the equipment body 40. Therefore, the plurality of through holes 1a are located on the side wall of the first housing 1 close to the second end 12.

[0057] When the ventilation duct 41 is an air outlet duct, the first end 11 of the first housing 1 is connected to the equipment body 40, and the second end 12 of the first housing 1 faces the external environment. Since the flow direction of the gas changes multiple times inside the equipment body 40, the pneumatic noise is mainly generated inside the equipment body 40. Therefore, the plurality of through holes 1a are located on the side wall of the first housing 1 close to the first end 11.

[0058] 1.4 First zone 101, second zone 102, third zone 103 and fourth zone 104

[0059] In some embodiments, when the ventilation duct 41 is an air outlet duct, referring to Figure 6 as shown, Figure 6 is a partial cross-sectional view of an air conditioning equipment provided by an embodiment of the present disclosure. The inner wall of the first housing 1 has a circumferentially arranged first zone 101, second zone 102, third zone 103 and fourth zone 104. The second zone 102 is adjacent to the first zone 101 and the fourth zone 104, and the third zone 103 is adjacent to the first zone 101 and the fourth zone 104.

[0060] The ventilation duct 41 is an air outlet duct. Referring to Figure 4 as shown,Figure 4 It is a front view of an air conditioning device provided by an embodiment of the present disclosure. The connection position of the air outlet duct and the device body 40 is located at a corner of the side wall where the connection position is located. The flow separation of the fluid in the tubular structure of the first housing 1 mainly occurs in the section A3 - A1 - A2 - A4, while there is no obvious flow separation in the section A4 - A3.

[0061] The section A1 - A2 of the inner wall of the first housing 1 from the first end 11 to the transition part 13 is the first area 101. The distance from a point on the first area 101 to the second housing 2 is positively correlated with the distance to the first end 11. The distances from the points on the first area 101 with the same distance to the first end 11 to the second housing 2 are equal. For example: The distance from a point on the first area 101 to the second housing 2 and the distance to the first end 11 can be linearly positively correlated. There are point A and point B on the first area 101. In the axial direction of the first housing, the distance S1 from point A to the first end 11 = 0, the distance from point A to the second housing 2 is H1, the distance S2 from point B to the first end 11, and the distance from point B to the second housing 2 is H2, where S2 > 0, H2 > H1. Then the linear change coefficient k1 = (H2 - H1) / S2. The distance from a point on the first area 101 to the first end 11 is S, and the distance H from a point on the first area 101 to the second housing 2 = H1 + S*(H2 - H1) / S2. At the same time, based on the above relationship, it can be known that the S of the points on the first area 101 with the same distance to the first end 11 is the same, so the distances H from the points on the first area 101 with the same distance to the first end 11 to the second housing 2 are also equal.

[0062] The distance from a point on the first area 101 to the second housing 2 and the distance to the first end 11 can also be non - linearly positively correlated. For example: the body contour curve of the Carangidae fish family, as shown in Figure 2 shown, its contour is a structure similar to a semi - ellipse and semi - parabola. Its principle is similar to the situation in the above - mentioned embodiment, and will not be elaborated here.

[0063] The section A1 - A3 of the inner wall of the first housing 1 from the first end 11 to the transition part 13 is the second area 102, and the section A2 - A4 from the first end 11 to the transition part 13 is the third area 103. The distance from a point on the second area 102 to the second housing 2 and the distance from a point on the third area 103 to the second housing 2 are positively correlated with the distance to the first end 11. Its principle is similar to the situation where the distance from a point on the first area 101 to the second housing 2 is positively correlated with the distance to the first end 11 in the above - mentioned embodiment, and will not be elaborated here.

[0064] The distance from a point on the second region 102 to the second housing 2 and the distance from a point on the third region 103 to the second housing 2 are negatively correlated with the distance to the first region 101. For example: The distance from a point on the second region 102 to the second housing 2 is linearly negatively correlated with the distance to the first region 101. The second region 102 has points C and D on a radial cross-section of the first housing 1, that is, the distances from points C and D to the first end 11 are equal. The distance S3 from point C to the boundary line between the first region 101 and the second region 102 is 0, the distance from point C to the second housing 2 is H3, the distance S4 from point D to the boundary line between the first region 101 and the second region 102, and the distance from point D to the second housing 2 is H4. Among them, S4 > 0, H4 < H3, then the linear change coefficient k2 = (H4 - H3) / S4. For a point on the second region 102 that is on the same radial cross-section as points C and D, the distance from this point to the boundary line between the first region 101 and the second region 102 is S, and the distance H from this point to the second housing 2 = H3 + S*(H4 - H3) / S4.

[0065] The distance from a point on the second region 102 to the second housing 2 and the distance to the first end 11 can also be non-linearly negatively correlated, and its principle is similar to the situation in the above embodiments, so it will not be elaborated here.

[0066] The A3 - A4 section of the inner wall of the first housing 1 from the first end 11 to the transition part 13 is the fourth region 104. The distances from any point on the fourth region 104 to the second housing 2 are all equal, that is, the radii of any point on the fourth region 104 of the first housing 1 are equal. It is preferably set that the outer wall of the first housing 1 is in contact with the inner wall of the second housing 2. The distance from any point on the fourth region 104 to the second housing 2 is the wall thickness of the first housing 1.

[0067] In some embodiments, when the ventilation duct 41 is an air outlet duct, referring to Figure 7 as shown, Figure 7 is a partial cross-sectional view of another air conditioning device provided by an embodiment of the present disclosure. Figure 7 In it, the outer wall of the first housing 1 is not shown. The inner wall of the first housing 1 has a fifth region 105, a sixth region 106, a seventh region 107, and an eighth region 108 arranged circumferentially. The sixth region 106 is adjacent to the fifth region 105 and the eighth region 108. The seventh region 107 is adjacent to the fifth region 105 and the eighth region 108.

[0068] The ventilation duct 41 is an air outlet duct, and the connection position of the air outlet duct to the equipment body 40 is located in a corner of the side wall where the connection position is located. The flow separation of the fluid in the tubular structure of the first housing 1 mainly occurs in the B3 - B1 - B2 - B4 section, while there is no obvious flow separation in the B4 - B3 section.

[0069] The inner wall of the first housing 1 from the second end 12 to the B1-B2 section of the transition part 13 is the fifth region 105. The distance from a point on the fifth region 105 to the second housing 2 is positively correlated with the distance to the second end 12. The distances from the first housing 1 to the second housing 2 corresponding to the points on the fifth region 105 at the same distance from the second end 12 are equal. For example: The distance from a point on the fifth region 105 to the second housing 2 and the distance to the second end 12 can be linearly positively correlated. There are point E and point F on the fifth region 105. In the axial direction of the first housing, the distance S5 from point E to the second end 12 is 0, the distance from point E to the second housing 2 is H5, the distance S6 from point F to the second end 12 is S6, and the distance from point F to the second housing 2 is H6. Among them, S6>0, H6>H1, then the linear change coefficient k1=(H6-H5) / S6. The distance from a point on the fifth region 105 to the second end 12 is S, and the distance H from a point on the fifth region 105 to the second housing 2 is H = H5+S*(H6-H5) / S6. At the same time, based on the above relationship, it can be known that the S values of the points on the fifth region 105 at the same distance from the second end 12 are the same, so the distances H from the points on the fifth region 105 at the same distance from the second end 12 to the second housing 2 are also equal.

[0070] The distance from a point on the fifth region 105 to the second housing 2 and the distance to the second end 12 can also be non-linearly positively correlated. For example: Referring to the body contour curve of the Carangidae fish, as shown in Figure 2 shown, its contour is a structure similar to a semi-ellipse and semi-parabola. Its principle is similar to the situation in the above embodiment and will not be elaborated here.

[0071] The inner wall of the first housing 1 from the second end 12 to the B1-B3 section of the transition part 13 is the sixth region 106, and the B2-B4 section from the second end 12 to the transition part 13 is the seventh region 107. The distance from a point on the sixth region 106 to the second housing 2 and the distance from a point on the seventh region 107 to the second housing 2 are positively correlated with the distance to the second end 12. Its principle is similar to the situation where the distance from a point on the fifth region 105 to the second housing 2 and the distance to the second end 12 are positively correlated in the above embodiment and will not be elaborated here.

[0072] The distance from a point on the sixth region 106 to the second housing 2 is negatively correlated with the distance to the fifth region 105. For example: The distance from a point on the sixth region 106 to the second housing 2 is linearly negatively correlated with the distance to the fifth region 105. The sixth region 106 has points G and H on a radial cross-section of the first housing 1, that is, the distances from points G and H to the second end 12 are equal. The distance S7 from point G to the boundary line between the fifth region 105 and the sixth region 106 is 0. The distance from point C to the second housing 2 is H7, the distance S8 from point H to the boundary line between the fifth region 105 and the sixth region 106 is S8, and the distance from point D to the second housing 2 is H8. Wherein, S8 > 0 and H8 < H7, then the linear change coefficient k2 = (H8 - H7) / S8. For a point on the sixth region 106 that is on the same radial cross-section as points G and H, the distance from this point to the boundary line between the fifth region 105 and the sixth region 106 is S, and the distance H from this point to the second housing 2 is H = H7 + S*(H8 - H7) / S8.

[0073] The distance from a point on the sixth region 106 to the second housing 2 and the distance to the second end 12 can also be non-linearly negatively correlated, and the principle is similar to the situation in the above embodiments, so it will not be elaborated here.

[0074] The section B3 - B4 of the inner wall of the first housing 1 from the second end 12 to the transition part 13 is the eighth region 108. The distances from any point on the eighth region 108 to the second housing 2 are equal, that is, the radii of any point on the eighth region 108 of the first housing 1 are equal. Preferably, it is set that the outer wall of the first housing 1 is in contact with the inner wall of the second housing 2. The distances from any point on the fourth region 104 to the second housing 2 are all the wall thickness of the first housing 1.

[0075] Figure 7 The fifth region 105, the sixth region 106, the seventh region 107, and the eighth region 108 shown in Figure 6 correspond to the first region 101, the second region 102, the third region 103, and the fourth region 104 shown in

[0076] II. The second housing 2

[0077] In some embodiments, referring to Figure 1 shown, the ventilation duct 41 may further include a second housing 2. The second housing 2 has a tubular structure. The second housing 2 has a third end 21 and a fourth end 22. The second housing 2 is sleeved outside the first housing 1. The third end 21 is connected to the first end 11, and the fourth end 22 is connected to the second end 12.

[0078] The second housing 2 is sleeved outside the first housing 1. The second housing 2 can protect the first housing 1 from being collided and rubbed by external objects, thereby preventing the first housing 1 from being damaged and affecting the flow rate of the fluid in the tubular structure of the first housing 1.

[0079] The third end 21 is connected to the first end 11, and the fourth end 22 is connected to the second end 12, enhancing the connection stability between the first housing 1 and the second housing 2 and preventing the first housing 1 from falling off from the tubular structure of the second housing 2.

[0080] The present disclosure does not specifically limit the shape of the second housing 2. Without special instructions, the second housing 2 is taken as an equal-diameter circular tube as an example. When the second housing 2 is an equal-diameter circular tube and the installation hole of the installation wall adapted to the second housing 2 is circular, it is convenient for drilling work, and at the same time simplifies the angle problem during the fitting installation of the circular tube and the circular hole, facilitating the installation work of the installers of the air conditioning device 4.

[0081] The present disclosure does not specifically limit the material of the second housing 2, which can be metal, plastic, ceramic, etc. Without special instructions, the second housing 2 is taken as a rigid anti-corrosion plastic as an example. The second housing 2 made of rigid anti-corrosion plastic can be directly embedded in the corresponding installation hole of the installation wall and can also play a role in fixing the equipment body 40.

[0082] In some embodiments, referring to Figure 1 and Figure 2 as shown, the first housing 1 and the second housing 2 are equal in length along the ventilation direction. The first housing 1 and the second housing 2 are equal in length along the ventilation direction, and their ends are flush. The ends connected to the equipment body 40 of the air conditioning device 4 are flush, which is convenient for simplifying the processing technology of their connection and reducing the processing cost; the ends facing the external environment are flush, reducing the material consumption of the second housing 2 and at the same time improving the aesthetics after the ventilation duct 41 is embedded in the installation wall.

[0083] The present disclosure does not specifically limit the values of the lengths of the first housing 1 and the second housing 2 along the ventilation direction, which can be matched and set according to the thickness of the installation wall, and should satisfy that the lengths of the first housing 1 and the second housing 2 along the ventilation direction are greater than or equal to the thickness of the installation wall. Without special instructions, taking the lengths of the first housing 1 and the second housing 2 along the ventilation direction being equal to the thickness of the installation wall as an example, when the lengths of the first housing 1 and the second housing 2 along the ventilation direction are equal to the thickness of the installation wall, the stress at the connection between the first housing 1, the second housing 2 and the equipment body 40 is reduced, preventing cracks or fractures, and at the same time, the ends of the first housing 1 and the second housing 2 facing the external environment are flush with one side of the installation wall, improving the aesthetics after the ventilation duct 41 is embedded in the installation wall.

[0084] III. Cavity 3

[0085] In some embodiments, referring to Figure 3 as shown, Figure 3 FIG. Figure 3 is a partial cross-sectional view of a ventilation duct provided by an embodiment of the present disclosure. There is a cavity 3 between a first housing 1 and a second housing 2.

[0086] The cavity 3 can cooperate with a through hole 1a on the side wall of the first housing 1 to further reduce the influence of the pneumatic noise of the fluid in the tubular structure of the first housing 1 on the outside world and improve the user experience. Sound-absorbing elements can also be placed inside the cavity 3 to assist in sound absorption.

[0087] The present disclosure does not specifically limit the number, material, and shape of the sound-absorbing elements. The sound-absorbing elements can be placed inside the cavity 3 and occupy all the space inside the cavity 3, or can be placed at positions inside the cavity 3 close to each through hole 1a. The sound-absorbing elements can be one or more of sound-absorbing foam, density board, mineral wool, wood fiber, and ceramic fiber, and can be selected according to factors such as cost and noise frequency.

[0088] The present disclosure does not specifically limit the size of the diameter of the second housing 2, nor does it specifically limit the size of the depth of the cavity 3 (i.e., the distance H from the first housing 1 to the second housing 2), which can be set according to the frequency of the pneumatic noise of the fluid in the tubular structure of the first housing 1. The lower the frequency of the noise, the larger the value of the depth of the cavity 3 should be.

[0089] The present disclosure does not specifically limit the internal form of the cavity 3 either. The cavity 3 can be divided into multiple regions with different volumes, corresponding to different sound absorption frequency bandwidths, to achieve broadband sound absorption. At the same time, various types of cavities 3 can also be set, such as: maze type, loop type, and segmented type. When the overall volume of the cavity 3 remains unchanged, the sound wave transmission distance can be increased, further broadening the sound absorption frequency range.

[0090] In some other embodiments, referring to Figure 8 as shown, Figure 8 FIG. Figure 8 is a schematic cross-sectional view of another ventilation duct provided by an embodiment of the present disclosure. The ventilation duct 41 can further include a plurality of connecting ribs 30. The connecting ribs 30 are located between the first housing 1 and the second housing 2 and are respectively connected to the first housing 1 and the second housing 2. The connecting ribs 30 can further enhance the mechanical strength of the connection between the first housing 1 and the second housing 2. At the same time, the connecting ribs 30 can divide the cavity 3 into multiple regions with different volumes, corresponding to different sound absorption frequency bandwidths, to achieve broadband sound absorption.

[0091] Based on the same concept, an embodiment of the present disclosure also provides an air conditioning device 4. The air conditioning device 4 can include the ventilation duct 41 as described in any one of the above embodiments.

[0092] Referring to Figure 5 as shown, Figure 5It is a schematic structural diagram of a ventilation duct provided by an embodiment of the present disclosure. The air conditioning device 4 may further include a device body 40. When the ventilation duct 41 is an air inlet duct, it is used to suck in external gas. The second end 12 of the first housing 1 is connected to the device body 40, and the first end 11 of the first housing 1 faces the external environment. The external gas enters the tubular structure of the first housing 1 from the first end 11 and enters the device body 40 from the second end 12, and exchanges heat with the working components (such as a heat exchanger) in the device body 40.

[0093] When the ventilation duct 41 is an air outlet duct, it is used to discharge the gas that has exchanged heat with the device body 40 from the device body 40. The first end 11 of the first housing 1 is connected to the device body 40, and the second end 12 of the first housing 1 faces the external environment. The gas inside the device body 40 enters the tubular structure of the first housing 1 from the first end 11 and is discharged to the external environment from the second end 12.

[0094] Correspondingly, the air conditioning device 4 including such a ventilation duct 41 has the same advantages as those of the ventilation duct 41, which will not be elaborated here.

[0095] The present disclosure does not specifically limit the number of ventilation ducts 41 in the air conditioning device 4, and it can be two or more. For example, when the number of ventilation ducts 41 is three, it can be two air inlet ducts and one air outlet duct, or it can also be one air inlet duct and two air outlet ducts. Specifically, it can be set according to the different air inlet and outlet flow rates and flow velocities requirements of different air conditioning devices 4. The multiple ventilation ducts 41 are connected to the same side wall of the device body 40.

[0096] The present disclosure does not specifically limit the connection method between the ventilation duct 41 and the device body 40. It can be a direct connection. For example, the ventilation duct 41 and the device body 40 are integrally formed, or the ventilation duct 41 and the device body 40 are welded. It can also be an indirect connection. For example, the ventilation duct 41 and the device body 40 are connected through a flange or a screw.

[0097] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present invention.

[0098] It will be understood that the term "a plurality of" in this disclosure means two or more, and other quantifiers are similar thereto. "And / or" describes the relationship between associated objects and indicates that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates an "or" relationship between the associated objects before and after. The singular forms of "a", "the" and "said" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0099] It can be further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other and do not indicate a specific order or degree of importance. In fact, the expressions such as "first" and "second" can be used interchangeably. For example, without departing from the scope of this disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0100] It can be further understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this embodiment and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0101] It can be further understood that unless otherwise specified, "connection" and "coupling" include direct connection between the two without other components therebetween, and also include indirect connection between the two with other elements therebetween.

[0102] It can be further understood that although the operations are described in a specific order in the drawings in the embodiments of this disclosure, it should not be understood that it is required to perform these operations in the specific order shown or in a serial order, or to perform all the operations shown to obtain the desired result. In a specific environment, multitasking and parallel processing may be advantageous.

[0103] Those skilled in the art will readily conceive of other embodiments of this disclosure after considering the specification and practicing the solutions disclosed herein. This disclosure is intended to cover any variations, uses or adaptations of this disclosure that follow the general principles of this disclosure and include common general knowledge or conventional technical means in the technical field not disclosed in this disclosure. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of this disclosure are pointed out by the following claims.

[0104] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A ventilation duct (41), characterized in that, The ventilation duct (41) includes a first housing (1); The first housing (1) has a tubular structure. The first housing (1) has a first end (11), a second end (12), and a transition portion (13). The transition portion (13) is located between the first end (11) and the second end (12). The cross-sectional area of the first housing (1) gradually decreases from the first end (11) to the transition portion (13), and the cross-sectional area of the first housing (1) gradually increases from the transition portion (13) to the second end (12). The cross-section is a cross-section perpendicular to the ventilation direction.

2. The ventilation duct (41) according to claim 1, characterized in that, The ventilation duct (41) further includes a second housing (2). The second housing (2) has a tubular structure. The second housing (2) has a third end (21) and a fourth end (22). The second housing (2) is sleeved outside the first housing (1). The third end (21) is connected to the first end (11), and the fourth end (22) is connected to the second end (12).

3. The ventilation duct (41) according to claim 2, characterized in that, The first housing (1) and the second housing (2) have the same length in the ventilation direction.

4. The ventilation duct (41) according to claim 2, characterized in that, The first housing (1) further has a plurality of through holes (1a), and the through holes (1a) are located on the side wall of the first housing (1).

5. The ventilation duct (41) according to claim 4, characterized in that, There is a cavity (3) between the first housing (1) and the second housing (2).

6. The ventilation duct (41) according to claim 2, characterized in that, The inner wall of the first housing (1) has a first zone (101), a second zone (102), a third zone (103), and a fourth zone (104) arranged circumferentially. The second zone (102) is adjacent to the first zone (101) and the fourth zone (104). The third zone (103) is adjacent to the first zone (101) and the fourth zone (104); The distance from a point in the first zone (101) to the second housing (2) is positively correlated with the distance to the first end (11); The distance from a point in the second zone (102) to the second housing (2) is positively correlated with the distance to the first end (11) and negatively correlated with the distance to the first zone (101); The distance from a point in the third zone (103) to the second housing (2) is positively correlated with the distance to the first end (11) and negatively correlated with the distance to the first zone (101); The distances from each point in the fourth zone (104) to the second housing (2) are all equal.

7. The ventilation duct (41) according to claim 2, characterized in that, The inner wall of the first housing (1) has a fifth zone, a sixth zone, a seventh zone, and an eighth zone arranged circumferentially. The sixth zone is adjacent to the fifth zone and the eighth zone. The seventh zone is adjacent to the fifth zone and the eighth zone; The distance from a point in the fifth zone to the second housing (2) is positively correlated with the distance to the second end (12); The distance from a point in the sixth zone to the second housing (2) is positively correlated with the distance to the second end (12) and negatively correlated with the distance to the fifth zone; The distance from a point in the seventh zone to the second housing (2) is positively correlated with the distance to the second end (12) and negatively correlated with the distance to the fifth zone; The distances from each point in the eighth region to the second housing (2) are all equal.

8. The ventilation duct (41) according to claim 1, characterized in that, The distance between the transition part (13) and the first end (11) in the ventilation direction is 10% - 40% of the length of the first housing (1) along the ventilation direction.

9. The ventilation duct (41) according to claim 1, characterized in that, The pipe diameter of the transition part (13) is 60% - 95% of the pipe diameter of the first end (11).

10. The ventilation duct (41) according to claim 1, characterized in that, The inner surface of the first housing (1) is smooth and has no sharp corners.

11. An air conditioning device (4), characterized in that, The air conditioning device (4) includes the ventilation duct (41) as described in any one of claims 1 to 10 above.

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