Eddy current improvement device and vehicle air conditioning system

Abstract

An eddy current improvement device and a vehicle air conditioning system relate to the technical field of air conditioners. The eddy current improvement device includes a contraction pipe, a mixing pipe, a diffuser pipe, a drainage pipe and a support seat; the inlet end of the contraction pipe is an air inlet, and the outlet end of the diffuser pipe is an air outlet; the mixing pipe is sleeved on the contraction pipe, and one end of the mixing pipe close to the air outlet is communicated with the inlet end of the diffuser pipe, and one end of the mixing pipe close to the air inlet is hermetically connected to the contraction pipe; the outlet end of the contraction pipe is arranged inside the mixing pipe; a mixing drainage hole communicated with the top of the drainage pipe is arranged on the pipe wall of the mixing pipe; the bottom of the drainage pipe is connected with a support seat, and an air suction port communicated with the drainage pipe is arranged on the support seat. The vehicle air conditioning system includes the eddy current improvement device. The purpose of the present invention is to provide an eddy current improvement device and a vehicle air conditioning system to improve or eliminate to a certain extent the technical problem of eddy current existing in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and more particularly, to a vortex improvement device and a vehicle air conditioning system. Background Art

[0002] In the structural design of a vehicle HVAC (heating, ventilation, and air conditioning system, air conditioning box), due to different requirements for different air outlet modes, such as air volume and temperature, there are various flow guiding ribs inside the HVAC to adjust flow characteristics such as the direction and speed of the fluid. However, the flow guiding ribs forcefully change the original flow direction of the fluid, resulting in the appearance of vortices in the area near the flow guiding ribs, and the vortices change the flow characteristics of the fluid near the wall surface, thereby affecting the performance of the vehicle HVAC.

[0003] Traditional methods for eliminating and improving vortices usually involve making the shape of an object streamlined to reduce the adverse pressure gradient of fluid flow, thereby suppressing the generation of vortices due to flow separation. However, the space in a vehicle HVAC is relatively narrow, and considering the mold release of the structure, generally the flow guiding ribs are arranged perpendicular to the shell wall surface, and the connection between the flow guiding ribs and the shell cannot be made into a transitional shape. In this way, the vortices formed near the flow guiding ribs inevitably have an adverse impact on the performance of the vehicle HVAC. For the vortices caused by the flow guiding ribs in the vehicle HVAC, generally, the position of the vortices is optimized by adjusting the position, size, shape, etc. of the flow guiding ribs so that they occur in a position that has little impact on the performance of the vehicle HVAC. However, in the later stage of the design of the vehicle HVAC product, the structural data has been frozen and cannot be changed to a large extent. At this time, the impact of local vortices caused by unreasonable design schemes such as the air outlet position and the arrangement of the flow guiding ribs on the performance of the vehicle HVAC cannot be fundamentally solved, affecting the performance of the vehicle HVAC. Summary of the Invention

[0004] The purpose of the present invention is to provide a vortex improvement device and a vehicle air conditioning system to improve or eliminate to a certain extent the technical problem of vortices existing in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A vortex improvement device includes a contraction tube, a mixing tube, a diffuser tube, a drainage tube, and a support base;

[0007] The inlet end of the contraction tube is an air inlet, and the outlet end of the diffuser tube is an air outlet;

[0008] The mixing tube is sleeved on the contraction tube, and one end of the mixing tube close to the air outlet is communicated with the inlet end of the diffuser tube, and one end of the mixing tube close to the air inlet is hermetically connected to the contraction tube; the outlet end of the contraction tube is arranged inside the mixing tube;

[0009] Mixing drainage holes communicated with the top of the drainage tube are arranged on the tube wall of the mixing tube;

[0010] The bottom of the drainage tube is connected with the support base, and an air suction port communicated with the drainage tube is arranged on the support base;

[0011] When the air flow sequentially flows through the air inlet, the contraction tube, the mixing tube, the diffuser tube and the air outlet, the gas around the support base can flow into the drainage tube and the mixing tube from the air suction port in sequence, and be discharged from the diffuser tube and the air outlet in sequence.

[0012] In any of the above technical solutions, optionally, in a plane parallel to the axis direction of the contraction tube, the projection of the drainage tube is streamlined.

[0013] In any of the above technical solutions, optionally, along the length direction of the drainage tube, the outer wall of the drainage tube includes a drainage tube windward increasing section and a drainage tube wake decreasing section connected in sequence;

[0014] From the air inlet to the air outlet, the width of the drainage tube windward increasing section gradually increases, the width of the drainage tube wake decreasing section gradually decreases, and the length of the drainage tube windward increasing section is less than the length of the drainage tube wake decreasing section; wherein, the length direction of the drainage tube is parallel to the axial direction of the contraction tube, and the width direction of the drainage tube is parallel to the radial direction of the contraction tube;

[0015] The range of the length L4 of the drainage tube is 6 mm - 10 mm;

[0016] The radius of the wake area of the drainage tube wake decreasing section is L5, and half of the maximum width of the drainage tube is L6, then the range of L6 / L5 is 7.3 - 9.3;

[0017] The range of the length L3 of the drainage cavity of the drainage tube is 4 mm - 6 mm, and the range of the maximum width D2 of the drainage cavity is 2 mm - 6 mm.

[0018] In any of the above technical solutions, optionally, the support base includes a support transition part and an installation base;

[0019] The top of the support transition part is fixedly connected to the drainage tube, and the bottom of the support transition part is fixedly connected to the installation base;

[0020] The outer surface of the support transition part is smoothly connected with the outer surface of the drainage tube;

[0021] One or more of the suction ports are provided on the mounting base;

[0022] The inner cavity of the support transition part communicates the suction port with the drainage cavity.

[0023] In any of the above technical solutions, optionally, a plurality of flow guiding vanes are arranged in the support seat; the flow guiding vanes are connected with the mounting base, and the flow guiding vanes extend into the support transition part;

[0024] The mounting base has a mounting insertion part protruding from the flow guiding vane;

[0025] In any of the above technical solutions, optionally, in a plane parallel to the axis direction of the contraction tube, the cross section of the support transition part is an annular shape;

[0026] The diameter gradually decreases from the bottom diameter of the support transition part to the top diameter of the support transition part; the side wall of the support transition part bends towards the axis of the support seat;

[0027] The range of the radius R1 of the mounting base is 6 mm - 10 mm;

[0028] The number of the flow guiding vanes is 3 - 5.

[0029] In any of the above technical solutions, optionally, the drainage cavity of the drainage tube is cylindrical, elliptical cylindrical, streamline-shaped column or quasi-streamline-shaped column;

[0030] And / or, a spiral drainage groove is arranged on the inner wall of the drainage cavity of the drainage tube.

[0031] In any of the above technical solutions, optionally, from the air inlet to the air outlet, the diameter of the contraction channel of the contraction tube gradually decreases, and the diameter of the diffusion channel of the diffusion tube gradually increases;

[0032] The diameter of the outlet end of the contraction channel is smaller than the diameter of the inlet end of the diffusion channel, and the diameter of one end of the mixing cavity of the mixing tube close to the air outlet is larger than the diameter of the inlet end of the diffusion channel;

[0033] The contraction tube and the diffusion tube are coaxially arranged, and / or the mixing tube and the contraction tube are coaxially arranged;

[0034] The distance H1 between the axis of the contraction tube and the bottom of the support seat ranges from 40 mm to 75 mm;

[0035] The range of the height H2 of the suction port is 4 mm - 8 mm;

[0036] From the air inlet to the air outlet, the length L1 of the contraction channel ranges from 10 mm to 15 mm, and the length L2 of the diffusion channel ranges from 15 mm to 20 mm;

[0037] The cone angle α1 of the contraction channel ranges from 4° to 8°; the cone angle α2 of the diffusion channel ranges from 9° to 11°.

[0038] An eddy current improvement device includes an eddy current improvement device;

[0039] The number of the drainage pipes is multiple, and the number of the support seats corresponds to the number of the drainage pipes;

[0040] The multiple drainage pipes are arranged circumferentially on the mixing pipe and communicate with the mixing cavity of the mixing pipe through the corresponding mixing drainage holes.

[0041] A vehicle air conditioning system includes an eddy current improvement device.

[0042] The beneficial effects of the present invention mainly lie in:

[0043] The eddy current improvement device and the vehicle air conditioning system provided by the present invention can be installed in the area where eddy currents exist inside the vehicle HVAC, eliminating or weakening the intensity of the eddy currents at that place, thereby changing the flow characteristics of the fluid in this area and minimizing the influence of the eddy currents on the product performance. Specifically, the fluid in the mainstream area of the vehicle HVAC flow channel enters from the air inlet, is accelerated through the contraction pipe, and flows out in the form of a jet in the mixing pipe. Due to the action of the mixing pipe wall surface and the diffusion pipe wall surface, the entrainment effect of the fluid will be enhanced. There is a pressure difference force between the fluid in the wall eddy current area where the eddy current improvement device is installed and the fluid in the mixing pipe. This pressure difference force will drive the fluid in the wall eddy current area to enter the drainage pipe and the mixing pipe through the suction port, and then be discharged from the diffusion pipe and the air outlet in sequence. The eddy current improvement device can be installed anywhere in the vehicle HVAC where eddy currents occur through the support seat, with great flexibility. It can greatly eliminate or improve the local eddy currents affecting the performance of the vehicle HVAC without changing the structure and flow characteristics of the vehicle HVAC itself, thereby solving to a certain extent the product performance problems caused by local eddy currents.

[0044] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, makes detailed descriptions as follows. Description of the Drawings

[0045] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention, and thus should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0046] Figure 1 Schematic diagram of the influence of the eddy current caused by the existing flow guiding ribs on the HVAC performance;

[0047] Figure 2 Schematic diagram of the structure of the eddy current improvement device provided by the embodiment of the present invention;

[0048] Figure 3 For Figure 2 A - A cross-sectional view of the eddy current improvement device shown (the support base is not shown in the figure);

[0049] Figure 4A For Figure 2 Bottom view of the eddy current improvement device shown;

[0050] Figure 4B For Figure 4A Schematic diagram of the fluid flow in the near-wall eddy current area shown;

[0051] Figure 5 For Figure 4A B - B cross-sectional view of the eddy current improvement device shown;

[0052] Figure 6 Another structural cross-sectional view of the eddy current improvement device provided by the embodiment of the present invention;

[0053] Figure 7A Schematic diagram of the structure of the variant of the eddy current improvement device provided by the embodiment of the present invention;

[0054] Figure 7B For Figure 7A Schematic diagram of the fluid flow of the eddy current improvement device shown;

[0055] Figure 8 Simulation diagram of the comparison of the flow characteristics in the near-wall eddy current area before and after installing the eddy current improvement device on the vehicle-mounted HVAC.

[0056] Icon: 110 - air inlet; 120 - contraction pipe; 130 - mixing pipe; 140 - diffuser pipe; 150 - air outlet; 160 - drainage pipe; 161 - increasing section of the drainage pipe facing the wind; 162 - decreasing section of the wake of the drainage pipe; 170 - support base; 171 - support transition part; 172 - installation base; 180 - suction port; 190 - deflector. Detailed implementation manners

[0057] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0059] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0060] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0061] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0062] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific cases.

[0063] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0064] Embodiment

[0065] This embodiment provides a vortex improvement device and a vehicle air conditioning system; please refer to Figures 2 - 8 , Figure 2 which is the front view of the vortex improvement device provided in this embodiment; Figure 3 is Figure 2 the sectional view taken along the line A-A of the vortex improvement device shown in the figure. The support base is not shown in the figure, and the sectional view of the drainage pipe is shown in the figure; Figure 4A is Figure 2 the bottom view of the vortex improvement device shown in the figure, Figure 4B is Figure 4A the schematic diagram of the fluid flow in the near-wall vortex region shown in the figure, showing the flow characteristics of the fluid in the near-wall vortex region passing through three suction ports; Figure 5 is Figure 4A the sectional view taken along the line B-B of the vortex improvement device shown in the figure; Figure 6 is another structural sectional view of the vortex improvement device provided in this embodiment, showing the spiral drainage grooves provided in the drainage cavity of the drainage pipe in the figure; Figure 7A is the schematic structural diagram of a variant of the vortex improvement device provided in this embodiment, showing two drainage pipes in the figure; Figure 7B is Figure 7A the schematic diagram of the fluid flow of the vortex improvement device shown in the figure; Figure 8 is the comparative simulation diagram of the flow characteristics of the near-wall vortex region before and after installing the vortex improvement device on the vehicle HVAC. Among them, Figure 4B and Figure 7B the arrows indicate the direction of gas flow.

[0066] The vortex improvement device provided in this embodiment can be used to improve and eliminate the vortex in the air duct, especially in the vehicle HVAC.

[0067] Referring to Figures 2 - 8 shown in the figure, the vortex improvement device includes a contraction pipe 120, a mixing pipe 130, a diffuser pipe 140, a drainage pipe 160, and a support base 170.

[0068] The inlet end of the contraction pipe 120 is an air inlet 110, and the outlet end of the diffuser pipe 140 is an air outlet 150.

[0069] The mixing tube 130 is sleeved on the contraction tube 120, and one end of the mixing tube 130 close to the air outlet 150 is communicated with the inlet end of the diffuser tube 140, and one end of the mixing tube 130 close to the air inlet 110 is hermetically connected to the contraction tube 120; the outlet end of the contraction tube 120 is arranged inside the mixing tube 130, and the outlet end of the contraction tube 120 is communicated with the inlet end of the diffuser tube 140 through the mixing tube 130. Optionally, a mixing cavity is formed between the tube walls of the mixing tube 130 and the contraction tube 120 and the inlet end of the diffuser tube 140, and the outlet end of the contraction tube 120 is arranged inside the mixing cavity.

[0070] Mixing drainage holes communicated with the top of the drainage tube 160 are arranged on the tube wall of the mixing tube 130; through the mixing drainage holes, the gas enters from the air suction port 180, flows into the mixing tube 130 through the drainage tube 160 and the mixing drainage holes in sequence, is mixed with the gas from the contraction tube 120, and is discharged from the diffuser tube 140.

[0071] A support base 170 is connected to the bottom of the drainage tube 160, and an air suction port 180 communicated with the drainage tube 160 is arranged on the support base 170. The support base 170 is used for being installed on the wall surface of the area where the eddy current exists; optionally, the air suction port 180 is arranged between the support base 170 and the wall surface. Optionally, the contraction tube 120, the mixing tube 130 and the diffuser tube 140 are used for flowing the fluid in the main flow channel. Optionally, the contraction tube 120 and the diffuser tube 140 are coaxially arranged, and / or the mixing tube 130 and the contraction tube 120 are coaxially arranged; optionally, the contraction tube 120, the mixing tube 130 and the diffuser tube 140 are coaxially arranged; optionally, the axial direction of the contraction tube 120 is parallel to or coincides with the flow direction of the fluid in the main flow channel. Optionally, the axial direction of the drainage tube 160 is perpendicular to the axial direction of the contraction tube 120.

[0072] When the air flow flows through the air inlet 110, the contraction tube 120, the mixing tube 130, the diffuser tube 140 and the air outlet 150 in sequence, the gas around the support base 170 can flow into the drainage tube 160 and the mixing tube 130 from the air suction port 180 in sequence, and is discharged from the diffuser tube 140 and the air outlet 150 in sequence.

[0073] The vortex improvement device described in this embodiment can be installed in the area where the vortex exists inside the vehicle-mounted HVAC to eliminate or weaken the intensity of the vortex there, thereby changing the flow characteristics of the fluid in this area and minimizing the impact of the vortex on product performance. Specifically, the fluid located in the mainstream area of ​​the vehicle-mounted HVAC flow channel enters from the air inlet 110, is accelerated through the contraction tube 120, and flows out in the mixing tube 130 in the form of a jet. Due to the action of the wall surface of the mixing tube 130 and the wall surface of the diffuser 140, the entrainment of the fluid is enhanced. There is a pressure difference between the fluid in the wall vortex area where the vortex improvement device is installed and the fluid in the mixing tube 130. The pressure difference will drive the fluid in the wall vortex area through the air intake 180, enter the drainage tube 160 and the mixing tube 130 in turn, and be discharged from the diffuser 140 and the air outlet 150 in turn. The eddy current improvement device can be installed at any place where eddy currents occur in the vehicle HVAC through the support seat 170. It has great flexibility and can greatly eliminate or improve local eddy currents that affect the performance of the vehicle HVAC without changing the structure and flow characteristics of the vehicle HVAC itself, thereby solving product performance problems caused by local eddy currents to a certain extent.

[0074] Figure 1 Schematic diagram of the effect of eddy currents caused by existing guide ribs on HVAC performance; Figure 1 The figure shows the vortex caused by the guide ribs near the defrost outlet in the full cold blowing mode. Since the middle hot channel and the defrost outlet channel are closed, the air flows through the upper and lower cold channels into the front and rear blowing outlets, prompting the air to enter the warm air core. There is always high-temperature hot water flowing in the warm air core, so the air flowing into the warm air core is heated. The heated air enters the rear blowing duct, causing the outlet temperature to rise, resulting in a high outlet temperature of the vehicle HVAC, which cannot meet the needs of passengers. The hot air guide channel formed by the defrost outlet guide ribs was originally used to increase the heat to the defrost outlet and increase the temperature of the defrost outlet in the defrost mode. However, the vortex caused by the defrost outlet guide ribs at this time enters the interior of the warm air core in the opposite direction along the defrost hot air guide channel, causing the temperature of the rear blowing surface to rise. Similarly, the vortex caused by the guide ribs will also produce a backflow phenomenon, causing the air volume of the outlet to not meet the requirements and the problem of air crossover between the flow channels.

[0075] Currently, in the later stage of the in-vehicle HVAC structure design, the structure is usually frozen and no major changes can be made anymore. At this time, due to design defects such as the position of the air outlet and the arrangement of the flow guiding ribs, local eddy currents cannot be eliminated by locally adding or removing the flow guiding ribs, and the performance problems of the product itself cannot be improved satisfactorily. To solve this problem, this embodiment proposes an eddy current improvement device as a general-purpose device. Different from traditional eddy current elimination methods, this eddy current improvement device does not change the structure of the product itself, but is only added as a separate part inside the in-vehicle HVAC. Even when the product data has been frozen in the later stage, the maximum benefit can still be achieved through the smallest change inside the HVAC structure. As a separate component, the eddy current improvement device has great flexibility and portability, can be installed at any position inside the HVAC, and can eliminate or improve the eddy current in any area. In addition, since the eddy current improvement device uses the pressure difference between the mainstream area and the near-wall eddy current area in the flow field as the driving force, no additional energy consumption is required, which has the characteristics of energy conservation and environmental protection.

[0076] In this embodiment, the eddy current improvement device utilizes the fact that after the fluid in the mainstream area of the internal flow channel of the in-vehicle HVAC passes through the contraction tube 120, the velocity of the fluid increases and it flows out in the form of a jet, while generating an entrainment effect. The high-speed fluid generates a low-pressure area. The fluid pressure at the near-wall eddy current area of the mounting support seat 170 is higher than the pressure of this low-pressure area, and the pressure difference between the two can be used as the driving force to suck the fluid in the eddy current area into the mainstream and then flow to the air outlet 150 together with the mainstream. The near-wall eddy current caused by other factors such as the flow guiding ribs can be eliminated or improved by this eddy current improvement device, avoiding its adverse impact on the performance of the in-vehicle HVAC.

[0077] In this embodiment, by changing some structural parameters of the eddy current improvement device, the absorption capacity of the eddy current improvement device for the near-wall eddy current can be reduced or enhanced, enabling it to be adapted to different products other than the in-vehicle HVAC, having the versatility of eddy current elimination, and meeting the requirements of different products for the degree of eddy current elimination.

[0078] Figure 8 It shows the comparison of the flow patterns in the near-wall eddy current area before and after installing the eddy current improvement device near the flow guiding ribs of the defrosting outlet in the full-cool blowing face mode of the in-vehicle HVAC. It can be seen that after installing the eddy current improvement device, the eddy current has been basically eliminated, that is, the eddy current that originally entered the heater core here is absorbed by the eddy current improvement device and no longer leads to the heater core, weakening the degree of heat leakage and improving the performance of the product.

[0079] See Figure 3As shown, in an alternative solution of this embodiment, on a plane parallel to the axis of the contraction tube 120, the projection of the drainage tube 160 is streamlined. The streamlined shape is also called a water droplet shape, with a round head, a very long and pointed tail, and such a shape has the least resistance. By adopting a streamlined outer shape for the drainage tube 160, the influence of the eddy current improvement device on the flow pattern of the mainstream in the vehicle-mounted HVAC flow channel can be reduced or avoided, so as to prevent the generation of new eddies on the outer wall surface of the drainage tube 160. The fluid in the near-wall eddy current area is entrained into the mixing tube 130 through the drainage tube 160. The fluid mixed in the mixing tube 130 flows out of the eddy current improvement device in the form of a jet again after passing through the diffuser tube 140, and flows together with the mainstream in the vehicle-mounted HVAC flow channel after mixing. In this way, the eddies on the near wall can be eliminated, improving the performance of the product.

[0080] See Figure 3 As shown, in an alternative solution of this embodiment, along the length direction of the drainage tube 160, the outer wall of the drainage tube 160 includes a drainage tube windward increasing section 161 and a drainage tube wake decreasing section 162 connected in sequence.

[0081] From the air inlet 110 to the air outlet 150, the width of the drainage tube windward increasing section 161 gradually increases, and the width of the drainage tube wake decreasing section 162 gradually decreases, and the length of the drainage tube windward increasing section 161 is less than the length of the drainage tube wake decreasing section 162; wherein, the length direction of the drainage tube 160 is parallel to the axial direction of the contraction tube 120, and the width direction of the drainage tube 160 is parallel to the radial direction of the contraction tube 120.

[0082] Optionally, the range of the length L4 of the drainage tube 160 is 4 mm - 15 mm; optionally, the range of the length L4 of the drainage tube 160 is 6 mm - 10 mm; for example, the length L4 of the drainage tube 160 is 6 mm, 7 mm or 10 mm. The size of the length of the drainage tube 160 affects the influence of the eddy current improvement device on the mainstream area. Among them, the larger the length L4 of the drainage tube 160, the smaller the influence of the eddy current improvement device on the mainstream area.

[0083] Optionally, the radius of the wake area of the drainage tube wake decreasing section 162 is L5, and half of the maximum width of the drainage tube 160 is L6, then the range of L6 / L5 is 7.3 - 9.3; for example, L6 / L5 is 7.3, 7.5, 8.8 or 9.3. The ratio of L6 / L5 determines the smoothness of the transition of the outer wall surface of the drainage tube 160. The wake area of the drainage tube wake decreasing section 162 is the end of the drainage tube wake decreasing section 162 far from the drainage tube windward increasing section 161. The maximum width of the drainage tube 160 is also the connection between the drainage tube windward increasing section 161 and the drainage tube wake decreasing section 162, and is also the maximum width of the drainage tube windward increasing section 161 and the maximum width of the drainage tube wake decreasing section 162.

[0084] See Figure 4A As shown, optionally, the length L3 of the drainage cavity of the drainage tube 160 ranges from 3 mm to 10 mm; optionally, the length L3 of the drainage cavity of the drainage tube 160 ranges from 4 mm to 6 mm; for example, the length L3 of the drainage cavity of the drainage tube 160 is 4 mm, 4.2 mm, 5 mm, 5.5 mm or 6 mm.

[0085] Optionally, the maximum width D2 of the drainage cavity ranges from 1 mm to 10 mm. Optionally, the maximum width D2 of the drainage cavity ranges from 2 mm to 6 mm. For example, the maximum width D2 of the drainage cavity is 2 mm, 3 mm, 4.5 mm or 6 mm. Wherein, half of the maximum width D2 of the drainage cavity is Figure 4A the R2 shown. The maximum width D2 of the drainage cavity and the length L3 of the drainage cavity of the drainage tube 160 together affect the air intake volume of the eddy current improvement device.

[0086] See Figures 2 - 7B As shown, in an alternative embodiment of the present embodiment, the support base 170 includes a support transition portion 171 and a mounting base 172.

[0087] The top of the support transition portion 171 is fixedly connected to the drainage tube 160, and the bottom of the support transition portion 171 is fixedly connected to the mounting base 172. Through the support transition portion 171, it is possible to reduce or avoid the influence of the eddy current improvement device on the flow pattern of the mainstream in the vehicle-mounted HVAC duct, so as to avoid the generation of new eddy currents due to the outer wall surface of the support base 170.

[0088] Optionally, the outer surface of the support transition portion 171 is smoothly connected to the outer surface of the drainage tube 160; to further reduce the influence of the outer surface of the support transition portion 171 on the flow pattern of the mainstream in the vehicle-mounted HVAC duct, so as to avoid the generation of new eddy currents due to the outer wall surface of the support base 170.

[0089] Optionally, one or more air intake ports 180 are provided on the mounting base 172; optionally, the number of air intake ports 180 is multiple; by providing a plurality of air intake ports 180, the smoothness of the fluid entering the eddy current improvement device can be improved to a certain extent.

[0090] Optionally, the inner cavity of the support transition portion 171 communicates the air intake port 180 with the drainage cavity. Optionally, the inner cavity of the support transition portion 171 is smoothly connected to the drainage cavity.

[0091] See Figure 5 As shown, in an alternative embodiment of the present embodiment, a plurality of flow guiding vanes 190 are provided in the support base 170; the flow guiding vanes 190 are connected to the mounting base 172, and the flow guiding vanes 190 extend into the support transition portion 171; through the flow guiding vanes 190, it is convenient for the fluid in the wall eddy current area to rotate upward and enter the drainage tube 160.

[0092] Optionally, the mounting base 172 has a mounting insertion portion protruding from the flow guiding fin 190; the support base 170 is mounted and connected to the wall surface through the mounting insertion portion, so that the eddy current improvement device is conveniently mounted and connected to the wall surface with eddy currents nearby.

[0093] See Figures 2 - 8 As shown, in an alternative embodiment of the present embodiment, in a plane parallel to the axis of the contraction tube 120, the cross-section of the support transition portion 171 is an annular shape.

[0094] Optionally, the diameter gradually decreases from the bottom diameter of the support transition portion 171 to the top diameter of the support transition portion 171; the side wall of the support transition portion 171 is bent toward the axis of the support base 170; with such a design, the influence of the eddy current improvement device on the flow pattern of the mainstream in the vehicle-mounted HVAC flow channel can be reduced or avoided, so as to avoid generating new eddy currents on the outer wall surface of the support base 170.

[0095] See Figure 4A As shown, optionally, the radius R1 of the mounting base 172 ranges from 6 mm to 10 mm; the size of R1 affects the air intake volume of the eddy current improvement device. For example, R1 is 6 mm, 8.5 mm, 9 mm or 10 mm.

[0096] Optionally, the number of the flow guiding fins 190 is 3 to 5. When the number of the flow guiding fins 190 increases, the smoothness of the fluid entering the eddy current improvement device can be improved, and the fluid entering it is not easily refluxed and separated from the air intake port 180, but the pressure loss of the eddy current in the mounting base 172 will increase and the air intake volume will decrease. Therefore, the number of the flow guiding fins 190 is 3 to 5.

[0097] In an alternative embodiment of the present embodiment, the drainage cavity of the drainage pipe 160 is a cylindrical shape, an elliptical cylindrical shape, a streamline column shape or a quasi-streamline column shape, or other shapes; Figure 5 As shown, the drainage cavity of the drainage pipe 160 is a quasi-streamline column shape, Figure 6 As shown, the drainage cavity of the drainage pipe 160 is a cylindrical shape.

[0098] See Figure 6 As shown, in an alternative embodiment of the present embodiment, a spiral drainage groove is provided on the inner wall of the drainage cavity of the drainage pipe 160. Through the spiral drainage groove, using the inclined plane principle, the fluid therein rises in a spiral shape, so as to enhance the absorption capacity of the entire eddy current improvement device for eddy currents.

[0099] See Figure 5As shown, in an alternative solution of this embodiment, from the air inlet 110 to the air outlet 150, the diameter of the contraction channel of the contraction tube 120 gradually decreases, and the diameter of the diffusion channel of the diffusion tube 140 gradually increases; the diameter of the outlet end of the contraction channel is smaller than the diameter of the inlet end of the diffusion channel, and the diameter of the end of the mixing chamber of the mixing tube 130 close to the air outlet 150 is larger than the diameter of the inlet end of the diffusion channel; with such a design, the fluid in the main flow region is contracted by the contraction tube 120 to generate a low-pressure region, and the pressure difference between the near-wall vortex region and the low-pressure region is used as a driving force to re-inhale the vortex into the main flow region without additional energy, thereby eliminating the influence of the vortex on the product performance, which has great economy.

[0100] Optionally, the distance H1 between the axis of the contraction tube 120 and the bottom of the support seat 170 ranges from 40 mm to 75 mm; H1 determines the degree of penetration into the main flow region, and the best position is exactly in the middle of the flow channel. Considering the size of the flow channel of the vehicle-mounted HVAC, 40 mm to 75 mm is taken here. For example, H1 is 40 mm, 50 mm, 65 mm or 75 mm.

[0101] Optionally, the height H2 of the air suction port 180 ranges from 4 mm to 8 mm; H2 determines the air suction capacity. For example, the height H2 of the air suction port 180 is 4 mm, 5 mm, 6.5 mm or 8 mm.

[0102] Optionally, from the air inlet 110 to the air outlet 150, the length L1 of the contraction channel of the contraction tube 120 ranges from 10 mm to 15 mm, for example, L1 is 10 mm, 12 mm or 15 mm.

[0103] Optionally, from the air inlet 110 to the air outlet 150, the length L2 of the diffusion channel of the diffusion tube 140 ranges from 15 mm to 20 mm; for example, L2 is 15 mm, 18 mm or 20 mm.

[0104] Optionally, the taper angle α1 of the contraction channel of the contraction tube 120 ranges from 4° to 8°; for example, the range of α1 is 4°, 5.5° or 8°.

[0105] Optionally, the cone angle α2 of the diffusion channel of the diffusion tube 140 ranges from 9° to 11°. For example, α2 is 9°, 10.5°, or 11°. When the cone angle of the contraction channel remains unchanged, increasing the length L1 of the contraction channel can increase the flow rate entering the main flow area of the eddy current improvement device and enhance the suction capacity. However, this may increase the envelope space occupied by the eddy current improvement device. Here, L1 is taken as 10 mm - 15 mm, and the cone angle α1 of the contraction channel is taken as 4° - 8°. Increasing the length L2 of the diffusion channel can reduce the eddy current formed when the gas jetting out from the eddy current improvement device converges with the main flow, and it plays a role of not affecting the main flow pattern. The same is true for the cone angle α2 of the diffusion channel. Here, L2 is taken as 15 mm - 20 mm, and α2 is taken as 9° - 11°.

[0106] See Figure 7A and 7B As shown, this embodiment also provides an eddy current improvement device, including the above-mentioned eddy current improvement device. The number of the drainage tubes 160 is multiple, and the number of the support seats 170 corresponds to the number of the drainage tubes 160; the multiple drainage tubes 160 are arranged circumferentially on the mixing tube 130 and communicate with the mixing cavity of the mixing tube 130 through corresponding mixing drainage holes. When eddy currents exist on multiple wall surfaces, a common contraction tube 120, mixing tube 130, and diffusion tube 140 can be used for multiple eddy current improvement devices, so that the eddy currents at multiple housing wall surfaces can be eliminated simultaneously.

[0107] For example, when eddy currents exist on symmetric housing wall surfaces, two eddy current improvement devices can be arranged symmetrically and installed, using a common contraction tube 120, mixing tube 130, and diffusion tube 140, so that the eddy currents at both sides of the housing wall surfaces can be eliminated simultaneously.

[0108] The eddy current improvement device described in this embodiment can play a certain role in eliminating the eddy currents near the wall surface in the internal flow channel of the vehicle-mounted HVAC, and can divert the eddy currents to the main flow area, thereby avoiding their influence on the product performance. Since the eddy current improvement device does not make a large change to the product itself, it can weaken or even eliminate the eddy currents near the wall surface without affecting the structural layout of the product. Therefore, it can be applied when the data in the later stage of product design has been largely frozen, and it can play a role in saving costs.

[0109] The eddy current improvement device can be used as a general component and is installed in the core area where eddy currents appear near the wall surface of the vehicle-mounted HVAC through the installation base, with great flexibility. Since it uses the pressure difference in the flow field itself as the driving force to achieve the effect of eliminating eddy currents, there is no additional energy input during the whole process, so it has economy.

[0110] By adjusting the structural dimensions, such as parameters like the length L1 of the contraction channel, the taper angle α1 of the contraction channel, the radius R1 of the mounting base 172, etc., the suction force generated by the eddy current improvement device can be changed, which enables it to be popularized and applied to products other than vehicle-mounted HVAC, and has flexible application scenarios. The eddy current improvement device has a simple structure, is easy to manufacture, has a low cost, and has a certain market prospect.

[0111] This embodiment also provides a vehicle air conditioning system including the above-mentioned eddy current improvement device.

[0112] The vehicle air conditioning system provided in this embodiment includes the above-mentioned eddy current improvement device. The technical features of the above-disclosed eddy current improvement device are also applicable to this vehicle air conditioning system, and the technical features of the above-disclosed eddy current improvement device will not be described repeatedly. In this embodiment, the vehicle air conditioning system has the advantages of the above-mentioned eddy current improvement device, and the advantages of the above-disclosed eddy current improvement device will not be described repeatedly here.

[0113] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An eddy current improvement device, characterized in that, it includes a contraction tube, a mixing tube, a diffuser tube, a drainage tube and a support base; The inlet end of the contraction tube is an air inlet, and the outlet end of the diffuser tube is an air outlet; The mixing tube is sleeved on the contraction tube, and one end of the mixing tube close to the air outlet is communicated with the inlet end of the diffuser tube, and one end of the mixing tube close to the air inlet is hermetically connected to the contraction tube; the outlet end of the contraction tube is arranged inside the mixing tube; Mixing drainage holes communicated with the top of the drainage tube are arranged on the tube wall of the mixing tube; The bottom of the drainage tube is connected with the support base, and an air suction port communicated with the drainage tube is arranged on the support base; When the air flow sequentially passes through the air inlet, the contraction tube, the mixing tube, the diffuser tube and the air outlet, the gas around the support base can sequentially flow into the drainage tube and the mixing tube from the air suction port, and sequentially discharge from the diffuser tube and the air outlet; Along the length direction of the drainage tube, the outer wall of the drainage tube includes a drainage tube windward increasing section and a drainage tube wake decreasing section connected in sequence; From the air inlet to the air outlet, the width of the drainage tube windward increasing section gradually increases, the width of the drainage tube wake decreasing section gradually decreases, and the length of the drainage tube windward increasing section is less than the length of the drainage tube wake decreasing section; wherein, the length direction of the drainage tube is parallel to the axial direction of the contraction tube, and the width direction of the drainage tube is parallel to the radial direction of the contraction tube.

2. The eddy current improvement device according to claim 1, characterized in that, In a plane parallel to the axis direction of the contraction tube, the projection of the drainage tube is streamlined; The drainage cavity of the drainage tube is cylindrical, elliptical cylindrical, streamlined column or quasi-streamlined column; A spiral drainage groove is arranged on the inner wall of the drainage cavity of the drainage tube.

3. The eddy current improvement device according to claim 2, characterized in that, The range of the length L4 of the drainage tube is 6mm - 10mm; The radius of the wake area of the drainage tube wake decreasing section is L5, and half of the maximum width of the drainage tube is L6, then the range of L6 / L5 is 7.3 - 9.3; The range of the length L3 of the drainage cavity of the drainage tube is 4mm - 6mm, and the range of the maximum width D2 of the drainage cavity is 2mm - 6mm.

4. The eddy current improvement device according to claim 1, characterized in that, The support base includes a support transition part and an installation base; The top of the support transition part is fixedly connected with the drainage tube, and the bottom of the support transition part is fixedly connected with the installation base; and the outer surface of the support transition part is smoothly connected with the outer surface of the drainage tube; One or more air suction ports are arranged on the installation base; The inner cavity of the support transition part communicates the air suction port with the drainage cavity of the drainage tube.

5. The eddy current improvement device according to claim 4, characterized in that, A plurality of flow guiding vanes are arranged in the support base; the flow guiding vanes are connected with the installation base and extend into the support transition part; The mounting base has a mounting and plugging portion protruding from the flow guiding fin.

6. The eddy current improvement device according to claim 5, wherein, in a plane parallel to the axis direction of the contraction tube, the cross section of the support transition portion is an annular shape; the diameter gradually decreases from the bottom diameter of the support transition portion to the top diameter of the support transition portion; the side wall of the support transition portion bends towards the axis of the support seat; the range of the radius R1 of the mounting base is 6 mm - 10 mm; the number of the flow guiding fins is 3 - 5.

7. The eddy current improvement device according to claim 1, wherein, the drainage cavity of the drainage tube is cylindrical, elliptical cylindrical, streamline column or quasi-streamline column; a spiral drainage groove is arranged on the inner wall of the drainage cavity of the drainage tube.

8. The eddy current improvement device according to claim 1, wherein, from the air inlet to the air outlet, the diameter of the contraction channel of the contraction tube gradually decreases, and the diameter of the diffusion channel of the diffusion tube gradually increases; the diameter of the outlet end of the contraction channel is smaller than the diameter of the inlet end of the diffusion channel, and the diameter of one end of the mixing cavity of the mixing tube close to the air outlet is larger than the diameter of the inlet end of the diffusion channel; the contraction tube and the diffusion tube are coaxially arranged, and / or, the mixing tube and the contraction tube are coaxially arranged; the range of the distance H1 between the axis of the contraction tube and the bottom of the support seat is 40 mm - 75 mm; the range of the height H2 of the air suction port is 4 mm - 8 mm; from the air inlet to the air outlet, the range of the length L1 of the contraction channel is 10 mm - 15 mm, and the range of the length L2 of the diffusion channel is 15 mm - 20 mm; the range of the taper angle α1 of the contraction channel is 4° - 8°; the range of the taper angle α2 of the diffusion channel is 9° - 11°.

9. An eddy current improvement device, wherein, comprises the eddy current improvement device according to any one of claims 1 - 8; the number of the drainage tubes is multiple, and the number of the support seats corresponds to the number of the drainage tubes; the multiple drainage tubes are arranged in the circumferential direction of the mixing tube and communicate with the mixing cavity of the mixing tube through corresponding mixing drainage holes.

10. A vehicle air conditioning system, wherein, comprises the eddy current improvement device according to any one of claims 1 - 9.

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