Fresh air exchange module and duct type air conditioner thereof

Abstract

A fresh air exchange module relates to the technical field of air conditioners, and comprises a centrifugal fan, a fan cover and a fan cover, the filtering assembly is slidably arranged between the inner side and the outer side of the connecting piece in the direction perpendicular to the air inlet direction of the centrifugal fan; the air outlet end of the air inlet assembly is connected with the connecting piece, the internal space of the air inlet assembly is gradually converged from the air inlet end of the air inlet assembly to the air outlet end of the air inlet assembly, and the air outlet end of the air inlet assembly is located above the filtering assembly; due to the fact that the internal space of the air inlet assembly is gradually converged from the air inlet end to the air outlet end of the air inlet assembly, airflow can enter the centrifugal fan in an accelerated mode, the efficiency of the centrifugal fan is improved, noise is reduced, meanwhile, the air outlet amount can be guaranteed, and the fresh air exchange module is simple in overall structure, can well give consideration to the sufficient fresh air amount, and is suitable for popularization and application. And the occupied space is small.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a fresh air ventilation module and an air duct unit thereof. Background Art

[0002] Most of the existing air conditioners are equipped with a fresh air system to introduce fresh air from the outdoor environment into the room to improve the air quality of the indoor environment. When choosing an air conditioner, people often take into account the space utilization rate, decoration aesthetics and air flow comfort of the house. In contrast, more and more people choose to use household central air conditioners (such as duct units, multi-split units, etc.) to replace traditional split household air conditioners (wall-mounted units, cabinet units).

[0003] In a Chinese invention with publication number CN116182302A, a fresh air module and an air duct machine are disclosed, the fresh air module includes a volute, an air inlet hood and a filter rack, the volute has a first open end; the air inlet hood has a second open end, the first open end is connected to the second open end, and an air duct is defined between the volute and the air inlet hood; the filter rack is installed between the volute and the air inlet hood to divide the air duct into a first chamber and a second chamber, the filter rack is provided with a guide ring, and the first chamber and the second chamber are connected through the guide ring.

[0004] Although the above patent can realize the fresh air function, when the centrifugal fan is used to suck air, the fresh air enters the air inlet hood directly from the air inlet. Moreover, since the air duct of the air inlet is straight and the connection between the air inlet and the air inlet hood is smooth, the incoming air flow is smooth and directly enters the centrifugal fan, resulting in low efficiency of the centrifugal fan, low air output, and the air flow is easily disturbed or turbulent to generate noise. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a fresh air ventilation module and an air duct machine thereof, which solve the problems of low efficiency, easy noise generation and low air output of the fresh air module in the prior art.

[0006] A fresh air ventilation module, comprising:

[0007] A centrifugal fan having a connecting piece installed on its air inlet end;

[0008] A filter assembly is slidably disposed between the inner and outer sides of the connecting member in a direction perpendicular to the air inlet direction of the centrifugal fan; and

[0009] The air inlet component has an air outlet end connected to the connecting piece, the internal space of the air inlet component gradually converges from the air inlet end to the air outlet end, and the air outlet end of the air inlet component is located above the filter component.

[0010] Compared with the prior art, the present invention has the following beneficial effects: when in use, the air outlet end of the centrifugal fan is connected to the duct machine, and then the centrifugal fan is started, so that external air enters from the air inlet component, is filtered by the filter component, and is sent into the duct machine and enters the room through the centrifugal fan; the operation is simple and convenient, and because the internal space of the air inlet component gradually converges from its air inlet end to its air outlet end, the airflow can be accelerated to enter the centrifugal fan, thereby improving the efficiency of the centrifugal fan, reducing noise, and ensuring the air outlet volume; the overall structure of the fresh air ventilation module is simple, which can well take into account sufficient fresh air volume while occupying a smaller space.

[0011] Preferably, the air inlet assembly includes an air inlet cavity and an air inlet cavity cover assembled with each other, the air inlet cavity is a whistle structure, a connecting pipe is fixedly installed at the lower part of the whistle body of the air inlet cavity, the air inlet cavity and the air inlet cavity cover are assembled at the whistle mouth of the air inlet cavity to form an air outlet, and the air outlet is connected to the connecting piece.

[0012] Preferably, the connecting member includes a support tube with one end fixedly connected to the air inlet end of the centrifugal fan, a cover plate is detachably mounted on the other end of the support tube, the filter assembly is slidably arranged between the inner and outer sides of the support tube perpendicular to the axial direction, an air inlet is opened on the side wall of the support tube, and the air outlet is fixedly connected to the air inlet.

[0013] Preferably, the filter assembly comprises a bracket slidably inserted between the inner and outer sides of the support tube in a direction perpendicular to the axial direction of the support tube, and a filter screen embedded in the bracket.

[0014] Preferably, the centrifugal fan includes a lower volute and an upper volute assembled with each other, a centrifugal fan rotatably installed in the lower volute and the upper volute, and a motor fixedly installed on the outer wall of the lower volute through a pressure plate, the air outlet end of the centrifugal fan is formed by assembling the lower volute and the upper volute, the air inlet end of the centrifugal fan is arranged on the upper volute, the power output shaft of the motor freely passes through the lower volute and is coaxially fixedly connected with the centrifugal fan, the support pipe is fixedly connected to the upper volute and is connected to the air inlet end, and the air inlet and the air outlet end of the centrifugal fan are located on both sides of the support pipe.

[0015] Preferably, the diameters of the two ends of the support tube are larger than the diameter of the middle part, and the bracket is slidably arranged between the inner and outer sides of the middle part of the support tube.

[0016] Preferably, a plurality of blocks are fixedly installed along the circumference of the side wall of the support tube away from the upper volute, and a plurality of rotating buckles are installed along the circumference of the side wall of the cover plate. The plurality of rotating buckles are used for one-to-one corresponding rotational connection with the plurality of blocks, and the cover plate is fixedly connected to the air inlet chamber cover via a connecting plate fixedly installed on its side wall.

[0017] Preferably, the connecting pipe is an internally threaded pipe for threaded connection to the air duct.

[0018] Preferably, the cross-sectional area of ​​the air outlet perpendicular to the air flow direction is greater than or equal to the cross-sectional area of ​​the air duct perpendicular to its axial direction, and the bottom side wall of the air outlet is located below the upper side wall of the filter.

[0019] The present invention also provides a duct air conditioner, comprising the fresh air ventilation module.

[0020] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure is a schematic structural diagram of an embodiment of the present invention.

[0022] Figure 2 for Figure 1 sectional view of .

[0023] Figure 3 for Figure 1 Exploded diagram.

[0024] Figure 4 for Figure 3 Exploded view of a centrifugal fan.

[0025] Figure 5 for Figure 3 Exploded view of the filtering component in Figure 2.

[0026] Figure 6 for Figure 3 Schematic diagram of the structure of the central air inlet assembly.

[0027] Figure 7 for Figure 1 A top view of one assembly method with a duct machine.

[0028] Figure 8 for Figure 1 Schematic diagram of the structure of another assembly method of the duct machine.

[0029] The numbers in the figure are: 1. lower volute; 11. centrifugal fan; 12. motor; 13. pressure plate; 2. upper volute; 3. support pipe; 31. air inlet; 32. block; 33. bracket; 34. filter; 4. cover; 41. rotating buckle; 42. connecting plate; 5. air inlet cavity; 51. connecting pipe; 6. air inlet cavity cover; 7. air duct; 8. duct machine; 81. lifting ear. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0031] like Figure 1-2 As shown, an embodiment of the present invention provides a fresh air ventilation module, including: a centrifugal fan, on which a connecting piece is installed on the air inlet end; a filter assembly, which is slidably arranged between the inner and outer sides of the connecting piece along a direction perpendicular to the air inlet direction of the centrifugal fan; and an air inlet assembly, whose air outlet end is connected to the connecting piece, and the internal space of the air inlet assembly gradually converges from its air inlet end to its air outlet end, and the air outlet end of the air inlet assembly is located above the filter assembly.

[0032] The air outlet end of the centrifugal fan is connected to the duct machine 8, and then the centrifugal fan is started, so that external air enters from the air inlet component, is filtered by the filter component, and is sent into the duct machine 8 and enters the room through the centrifugal fan; the operation is simple and convenient, and because the internal space of the air inlet component gradually converges from its air inlet end to its air outlet end, the airflow can enter the centrifugal fan at an accelerated speed, thereby improving the efficiency of the centrifugal fan, reducing noise, and ensuring the air outlet volume; the fresh air ventilation module has a simple overall structure, which can well take into account sufficient fresh air volume while occupying a smaller space.

[0033] like Figure 1-6 As shown, according to another embodiment of the present invention, a fresh air ventilation module further optimizes the air intake assembly, connector, filter assembly, and centrifugal fan included therein, the air intake assembly includes an air intake cavity 5 and an air intake cavity cover 6 assembled with each other, the air intake cavity 5 is a whistle structure, a connecting pipe 51 is fixedly installed at the lower part of the whistle body of the air intake cavity 5, the air intake cavity 5 and the air intake cavity cover 6 are assembled at the whistle mouth of the air intake cavity 5 to form an air outlet, and the air outlet is connected to the connector; the structure of the above-mentioned air intake cavity 5 helps the airflow to pass through the air intake cavity 5 more smoothly, and can accelerate the airflow so that the airflow quickly enters the support tube 3, so as to ensure that the fresh air volume is sufficient and strong; and preferably, the connecting pipe 51 is an internal threaded tube for threaded connection to the air duct 7, and the cross-sectional area of ​​the air outlet perpendicular to the airflow direction is greater than or equal to the cross-sectional area of ​​the air duct 7 perpendicular to its axial direction, which can also ensure that a sufficient amount of fresh air enters the centrifugal fan.

[0034] The connecting piece includes a support tube 3 whose one end is fixedly connected to the air inlet end of the centrifugal fan, and a cover plate 4 is detachably mounted on the other end of the support tube 3. The filter assembly is slidably inserted between the inner and outer sides of the support tube 3 perpendicular to the axial direction, and an air inlet 31 is opened on the side wall of the support tube 3, and the air outlet is fixedly connected to the air inlet 31.

[0035] The filter assembly includes a bracket 33 that slides perpendicular to the axial direction of the support tube 3 and penetrates between the inner and outer sides thereof, and a filter screen 34 embedded in the bracket 33. The fresh air is filtered through the filter screen 34, and the bracket 33 can be pulled out of the support tube 3 to facilitate regular cleaning or replacement of the filter screen 34; and the bottom side wall of the air outlet is located below the upper side wall of the filter screen 34, so that the fresh air can quickly pass through the filter screen 34; and preferably, the diameters of the two ends of the support tube 3 are larger than the middle diameter, and the bracket 33 slides between the inner and outer sides of the middle part of the support tube 3; the shape of the above-mentioned support tube 3 is conducive to mold demolding, and is also conducive to the rapid gathering of airflow in the support tube 3.

[0036] The centrifugal fan includes a lower volute 1 and an upper volute 2 assembled with each other, a centrifugal fan 11 rotatably installed in the lower volute 1 and the upper volute 2, and a motor 12 fixedly installed on the outer wall of the lower volute 1 through a pressure plate 13. The air outlet end of the centrifugal fan is formed by assembling the lower volute 1 and the upper volute 2, and the air inlet end of the centrifugal fan is arranged on the upper volute 2. The power output shaft of the motor 12 freely passes through the lower volute 1 and is coaxially fixedly connected with the centrifugal fan 11. The support pipe 3 is fixedly connected to the upper volute 2 and communicated with the air inlet end. The air inlet 31 and the air outlet end of the centrifugal fan are located on both sides of the support pipe 3.

[0037] like Figure 1 as well as Figure 3 As shown, according to another embodiment of the present invention, in the fresh air ventilation module, preferably, a plurality of blocks 32 are fixedly installed on the side wall of the support tube 3 away from the end of the upper volute 2 along its circumference, and a plurality of rotating buckles 41 are installed on the side wall of the cover plate 4 along its circumference, and the plurality of rotating buckles 41 are used for one-to-one corresponding rotational connection with the plurality of blocks 32, so that the cover plate 4 and the support tube 3 can be easily disassembled and assembled, and the cover plate 4 is fixedly connected to the air inlet chamber cover 6 by a connecting plate 42 fixedly installed on its side wall, so as to prevent the cover plate 4 from being separated from the support tube 3 due to the vibration of the motor 12; and a rubber sealing pad, a gasket or a sponge is used to seal the cover plate 4 and the support tube 3 to ensure good air tightness.

[0038] The present invention also provides a duct unit, including the above-mentioned fresh air ventilation module; when the fresh air ventilation module is installed, its top surface is not higher than the height of the duct unit 8 hanging ear 81, and its bottom surface is not lower than the bottom surface of the duct unit 8; and in order to ensure that the fresh air introduced by the duct unit 8 can enter the room after being temperature-adjusted by the duct unit 8, two installation methods of the fresh air ventilation module are provided here:

[0039] Same method Figure 7 As shown, the outlet end of the centrifugal fan in the fresh air ventilation module is arranged at the return air outlet on the top of the air duct machine 8, so that the outdoor fresh air can be sucked in for the second time by the fan of the air duct machine 8 and blown into the room after being temperature-regulated by the evaporator;

[0040] Method 2 Figure 8 As shown, the air outlet end of the centrifugal fan in the fresh air ventilation module is connected and installed with the knock-out hole reserved on the side panel of the duct machine 8, so that the outdoor fresh air directly enters the air inlet chamber in front of the evaporator of the duct machine 8, and then is sucked in for the second time by the fan of the duct machine 8, and is blown into the room after being temperature-adjusted by the evaporator.

[0041] Both of the above methods can achieve the purpose of adjusting the temperature of the fresh air, so that the fresh air blown into the room can bring people a better physical feeling.

[0042] The operating principle of the present invention is as follows: when the present invention is used, the air outlet end of the centrifugal fan is connected to the corresponding position of the duct machine 8, and then one end of the support tube 3 is fixedly connected to the upper volute 2 and connected to the air inlet end, and the cover plate 4 is sealed and installed on the other end of the support tube 3, and at the same time, each rotating buckle 41 is rotated to engage with the corresponding clamping block 32 to connect and fix the cover plate 4 to the support tube 3, and then the air inlet chamber cover 6 is assembled with the air inlet chamber 5, and the air outlet formed by the assembly of the air inlet chamber cover 6 and the air inlet chamber 5 is connected and fixed to the air inlet 31 on the side wall of the support tube 3, and the connecting plate 42 is fixedly connected to the air inlet chamber cover 6, and finally the air duct 7 is threadedly connected to the connecting pipe 51, and then the motor 12 is started to drive the centrifugal fan 11 to rotate, so as to send the outdoor fresh air into the duct machine 8, which is sucked in for the second time by the fan of the duct machine 8 and blown into the room after the temperature of the evaporator is adjusted.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A fresh air ventilation module, characterized in that: include: A centrifugal fan having a connecting piece installed on its air inlet end; A filter assembly is slidably disposed between the inner and outer sides of the connecting member in a direction perpendicular to the air inlet direction of the centrifugal fan; as well as The air inlet component has an air outlet end connected to the connecting piece, the internal space of the air inlet component gradually converges from the air inlet end to the air outlet end, and the air outlet end of the air inlet component is located above the filter component.

2. A fresh air ventilation module according to claim 1, characterized in that: The air inlet assembly comprises an air inlet cavity (5) and an air inlet cavity cover (6) which are assembled with each other, the air inlet cavity (5) is a whistle structure, a connecting pipe (51) is fixedly installed at the lower part of the whistle body of the air inlet cavity (5), the air inlet cavity (5) and the air inlet cavity cover (6) are assembled at the whistle mouth of the air inlet cavity (5) to form an air outlet, and the air outlet is connected to the connecting piece.

3. A fresh air ventilation module according to claim 2, characterized in that: The connecting member comprises a support tube (3) having one end fixedly connected to the air inlet end of the centrifugal fan, a cover plate (4) being detachably mounted on the other end of the support tube (3), the filter assembly being slidably arranged between the inner and outer sides of the support tube (3) perpendicular to the axial direction of the support tube (3), an air inlet (31) being provided on the side wall of the support tube (3), and the air outlet being fixedly connected to the air inlet (31).

4. A fresh air ventilation module according to claim 3, characterized in that: The filter assembly comprises a bracket (33) slidably arranged between the inner and outer sides of the support tube (3) in a direction perpendicular to the axial direction of the support tube (3), and a filter screen (34) embedded in the bracket (33).

5. A fresh air ventilation module according to claim 3, characterized in that: The centrifugal fan comprises a lower volute (1) and an upper volute (2) which are assembled with each other, a centrifugal fan (11) which is rotatably mounted in the lower volute (1) and the upper volute (2), and a motor (12) which is fixedly mounted on the outer wall of the lower volute (1) via a pressure plate (13); the air outlet of the centrifugal fan is formed by assembling the lower volute (1) and the upper volute (2); the air inlet of the centrifugal fan is arranged on the upper volute (2); the power output shaft of the motor (12) freely passes through the lower volute (1) and is coaxially fixedly connected to the centrifugal fan (11); the support pipe (3) is fixedly connected to the upper volute (2) and communicates with the air inlet; the air inlet (31) and the air outlet of the centrifugal fan are located on both sides of the support pipe (3).

6. A fresh air ventilation module according to claim 4, characterized in that: The diameters of the two ends of the support tube (3) are larger than the diameter of the middle part thereof, and the bracket (33) is slidably arranged between the inner and outer sides of the middle part of the support tube (3).

7. A fresh air ventilation module according to claim 3, characterized in that: A plurality of clamping blocks (32) are fixedly mounted along the circumference of the side wall of the support tube (3) at one end away from the upper volute (2); a plurality of rotating buckles (41) are mounted along the circumference of the side wall of the cover plate (4); the plurality of rotating buckles (41) are used for rotatingly engaging with the plurality of clamping blocks (32) in a one-to-one correspondence; the cover plate (4) is fixedly connected to the air inlet chamber cover (6) via a connecting plate (42) fixedly mounted on the side wall thereof.

8. A fresh air ventilation module according to claim 2, characterized in that: The connecting pipe (51) is an internally threaded pipe for threaded connection with the air duct (7).

9. A fresh air ventilation module according to claim 8, characterized in that: The cross-sectional area of ​​the air outlet perpendicular to the airflow direction is greater than or equal to the cross-sectional area of ​​the air duct (7) perpendicular to its axial direction, and the bottom side wall of the air outlet is located below the upper side wall of the filter screen (34).

10. A duct machine, characterized in that: It comprises a fresh air ventilation module as described in any one of claims 1-9.

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