Drainage assembly and heating and ventilation equipment

By designing drainage components in HVAC equipment and using the combination of drainage nozzles, conveying pipelines and power pumps, the problem of low drainage efficiency in the prior art is solved, and efficient discharge of condensate water is achieved.

CN222187296UActive Publication Date: 2024-12-17HEFEI MIDEA HEATING & VENTILATING EQUIP +1
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Patent Information

Application Number
CN202420658646.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-01
Publication Date
2024-12-17
Estimated Expiration
2034-04-01

AI Technical Summary

Technical Problem

The drainage method of existing HVAC equipment is low in efficiency, resulting in the inability to discharge condensate water effectively.

Method used

A drainage assembly is designed, including a drain nozzle, a conveying pipeline and a power pump. The inlet end of the drain nozzle is plugged into the water connection plate, the conveying pipeline is connected to the outlet end of the drain nozzle, and a filter element is provided therein to improve the Drainage efficiency.

Benefits of technology

Through the action of the power pump, the condensate water is pumped and discharged through the filter element, which significantly improves the discharge efficiency of the condensate water, avoids blockage of the drain nozzle and the conveying pipeline, and enhances the drainage efficiency.

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Abstract

The utility model relates to the technical field of air conditioners, in particular to a drainage assembly and heating and ventilation equipment. The drainage assembly is used for the heating and ventilation equipment, the heating and ventilation equipment comprises a water receiving disc used for collecting condensate water, the drainage assembly comprises a drainage nozzle, and the inlet end of the drainage nozzle can be inserted into the water receiving disc; the conveying pipeline is connected with the outlet end of the drainage nozzle; at least one of the drainage nozzle and the conveying pipeline is provided with the filtering part; and the power pump is arranged on the conveying pipeline and is used for pumping and discharging the condensate water in the water pan through the conveying pipeline. According to the drainage assembly provided by the utility model, the inlet end of the drainage nozzle can be inserted into the water receiving plate, and the conveying pipeline is connected with the outlet end of the drainage nozzle, so that condensate water in the water receiving plate can be discharged after being filtered by the filtering piece under the action of the power pump, and the drainage efficiency of the condensate water is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, in particular to a drainage component and a HVAC device. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] HVAC equipment, such as the outdoor unit or indoor unit of an air conditioner, will generate a large amount of condensed water during operation, and the condensed water is usually collected in a water receiving pan.

[0004] In the prior art, a drain port is usually provided in the water receiving tray to drain the water through the drain port, but this drainage method has the problem of low drainage efficiency. Utility Model Content

[0005] The purpose of the utility model is to at least solve the problem of low drainage efficiency of the drainage method of HVAC equipment in the prior art. This purpose is achieved through the following technical solutions:

[0006] A first aspect of the utility model provides a drainage assembly for a HVAC device, wherein the HVAC device includes a water receiving pan for collecting condensed water, and the drainage assembly includes:

[0007] A drainage nozzle, the inlet end of which can be plugged into the water receiving tray;

[0008] A delivery pipeline, the delivery pipeline is connected to the outlet end of the drain nozzle;

[0009] a filter element, at least one of the drain nozzle and the delivery pipeline is provided with the filter element; and

[0010] A power pump is arranged in the delivery pipeline and is used to pump the condensed water in the water receiving tray out through the delivery pipeline.

[0011] According to the drainage assembly of the utility model, by inserting the inlet end of the drainage nozzle into the water receiving tray and connecting the delivery pipeline to the outlet end of the drainage nozzle, the condensed water in the water receiving tray can be discharged after being filtered by the filter element under the action of the power pump, thereby improving the discharge efficiency of the condensed water.

[0012] In addition, the drainage assembly according to the utility model may also have the following additional technical features:

[0013] In some embodiments of the present invention, the filter element is provided on the drain nozzle, and the filter element includes a filter net, and at least a portion of the filter net protrudes from the inlet end of the drain nozzle.

[0014] In some embodiments of the utility model, the filter net includes a first filter portion and a second filter portion connected to each other, the first filter portion is a planar structure, the second filter portion is an annular structure arranged along the edge of the first filter portion, the second filter portion is connected to the drain nozzle, and the first filter portion is arranged outside the drain nozzle and spaced apart from the drain nozzle.

[0015] In some embodiments of the utility model, part of the second filter part is inserted into the drainage nozzle, and an opening is formed at one end of the second filter part away from the first filter part. A limiting plate is provided on the circumferential edge of the opening, and the limiting plate is limitedly matched with the outlet end of the drainage nozzle.

[0016] In some embodiments of the present invention, the drain nozzle is a tubular structure, and at least a portion of the drain nozzle is sleeved in the delivery pipeline.

[0017] In some embodiments of the present invention, the limiting plate is an annular plate.

[0018] In some embodiments of the present invention, the drainage nozzle and the second filter portion are interference fit.

[0019] In some embodiments of the present invention, the drainage nozzle is sealed and connected to the second filter part.

[0020] In some embodiments of the utility model, the delivery pipeline includes a first pipeline, a second pipeline and a third pipeline connected in sequence; wherein, the first pipeline is connected to the drain nozzle, and the flow area of ​​the first pipeline is larger than the flow area of ​​the second pipeline and larger than the flow area of ​​the third pipeline.

[0021] In some embodiments of the present invention, the delivery pipeline is a circular pipe, and the second pipeline is a reducing pipe.

[0022] In some embodiments of the present invention, the drainage component further includes a valve, which is disposed in the delivery pipeline and is located at the downstream side of the power pump.

[0023] The second aspect of the utility model provides a HVAC device, the HVAC device comprising:

[0024] a drain pan for collecting condensed water;

[0025] And as the drainage assembly mentioned in the above embodiment, the drainage nozzle is inserted into the water receiving tray and communicated with the interior of the water receiving tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0027] Figure 1 The schematic diagram of the structure of the drainage assembly according to the embodiment of the utility model is schematically shown;

[0028] Figure 2 for Figure 1 A partial enlarged structural schematic diagram of the drainage component at A shown in FIG.

[0029] Figure 3 for Figure 1 A schematic diagram of the structure of the drainage assembly shown in FIG. 1 at a second viewing angle;

[0030] Figure 4 for Figure 3 A partial enlarged structural schematic diagram of the drainage component at B shown in FIG.

[0031] Figure 5 for Figure 1 A schematic diagram of the structure of the filter element of the drainage assembly shown in ;

[0032] Figure 6 for Figure 5 A schematic structural diagram of the filter element of the drainage assembly shown in FIG. 1 at a second viewing angle;

[0033] Figure 7 for Figure 1 Schematic diagram of the assembly structure of the filter element and the drain nozzle of the drainage assembly shown in ;

[0034] Figure 8 The structural diagram of the HVAC equipment according to the embodiment of the utility model is schematically shown.

[0035] The reference numerals are as follows:

[0036] 100. Drainage assembly;

[0037] 10. Drain nozzle; 11. Inlet end; 12. Outlet end;

[0038] 20. Delivery pipeline; 21. First pipeline; 22. Second pipeline; 23. Third pipeline;

[0039] 30. filter element; 31. filter screen; 311. first filter portion; 312. second filter portion; 32. opening; 33. limit plate;

[0040] 40. Power pump;

[0041] 50. Valve;

[0042] 200, water tray;

[0043] 300, housing;

[0044] 400, base;

[0045] 1000. HVAC equipment. DETAILED DESCRIPTION

[0046] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0047] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0048] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0049] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0050] like Figures 1 to 8 As shown, according to the first aspect of the embodiment of the utility model, a drainage assembly 100 is proposed. The drainage assembly 100 is used on a HVAC device 1000, such as Figures 1 to 4 As shown, Figure 1 The structure diagram of the drainage assembly 100 according to the embodiment of the utility model is schematically shown. Figure 2 for Figure 1 The partially enlarged structural diagram of the drainage assembly 100 at A shown in FIG. Figure 3 for Figure 1 The structural schematic diagram of the drainage assembly 100 shown in FIG. Figure 4 for Figure 3 The HVAC equipment 1000 includes a water tray 200, which is used to collect condensed water. The drainage assembly 100 includes a drain nozzle 10, a delivery pipeline 20, a filter 30 and a power pump 40. The drain nozzle 10 is provided with an inlet end 11 and an outlet end 12, wherein the inlet end 11 of the drain nozzle 10 can be plugged into the water tray 200, and one end of the delivery pipeline 20 is connected to the outlet end 12 of the drain nozzle 10; at least one of the drain nozzle 10 and the delivery pipeline 20 is provided with a filter 30; and the delivery pipeline 20 is provided with a power pump 40, so that the condensed water in the water tray 200 is pumped out through the delivery pipeline 20.

[0051] Optionally, the power pump 40 here can be a shielded pump or a centrifugal pump, among which the power pump 40 adopts a shielded pump, which has the advantages of being fully enclosed, highly safe, and having low energy consumption. Of course, the power pump 40 here can also be other types of water pumps, which can drive the condensed water in the water receiving tray 200 to be discharged through the delivery pipeline 20.

[0052] It should be noted that the other end of the delivery pipeline 20 here can be connected to components such as a water tank to achieve the reuse of the condensed water after discharge. For example, the condensed water can be used as a water source for the humidification component. Of course, the condensed water here can also be directly discharged into the environment as wastewater.

[0053] In addition, the drain nozzle 10 here can be plugged into the water receiving tray 200, and the drain nozzle 10 can be inserted into the water receiving tray 200 after passing through the side of the water receiving tray 200, or inserted into the water receiving tray 200 from the open end of the water receiving tray 200. In order to ensure that the drain nozzle 10 can still achieve the function of draining water when the amount of condensed water in the water receiving tray 200 is small, the drain nozzle 10 here is arranged close to the bottom of the water receiving tray 200, thereby reducing the risk of overflow caused by too much condensed water in the water receiving tray 200.

[0054] It should be explained that the filter element 30 here can be one or more. When there is one filter element 30, the filter element 30 can be set in the drain nozzle 10 or in the delivery pipeline 20; when there are two or more filter elements 30, two or more filter elements 30 are respectively set in the drain nozzle 10 and in the delivery pipeline 20, so as to realize multiple filtering of condensed water.

[0055] According to the drainage assembly 100 of the utility model, by inserting the inlet end 11 of the drain nozzle 10 into the water receiving tray 200 and connecting the delivery pipeline 20 with the outlet end 12 of the drain nozzle 10, the condensed water in the water receiving tray 200 can be discharged after being filtered by the filter element 30 under the action of the power pump 40, thereby improving the discharge efficiency of the condensed water.

[0056] Alternatively, if Figures 3 to 6 As shown, Figure 5 for Figure 1 The structural diagram of the filter element 30 of the drainage assembly 100 is shown in FIG. Figure 6 for Figure 5 The filter element 30 of the drain assembly 100 shown in the figure is a structural schematic diagram at a second perspective, and a filter element 30 is provided on the drain nozzle 10, and the filter element 30 includes a filter mesh 31, and at least a portion of the filter mesh 31 protrudes from the inlet end 11 of the drain nozzle 10, that is, at least a portion of the filter mesh 31 is arranged outside the drain nozzle 10, wherein the filter mesh 31 located outside the drain nozzle 10 can filter the water, so that the debris in the condensed water cannot enter the drain nozzle 10, and the drain nozzle 10 and the delivery pipeline 20 will not be blocked.

[0057] When there are a lot of debris in the water receiving tray 200, the debris can be removed by directly cleaning the inside of the water receiving tray 200.

[0058] It should be noted that the filter screen 31 here has a supporting structure in addition to the mesh structure for filtering, so that the filter screen 31 can have a fixed shape in the drain nozzle 10. The supporting structure here can be a grid-shaped support frame, or other components that can have a supporting function, such as a strip structure or multiple annular structures arranged at intervals. These are common structures of the filter screen 31 and will not be elaborated here.

[0059] Optionally, the filter net 31 includes a first filter part 311 and a second filter part 312 connected to each other, wherein the first filter part 311 is a planar structure, the second filter part 312 is an annular structure, the second filter part 312 is arranged along the edge of the first filter part 311, the second filter part 312 is connected to the drain nozzle 10, and the first filter part 311 is arranged outside the drain nozzle 10 and spaced from the drain nozzle 10. The second filter part 312 here may have a filtering function or may not have a filtering function, and the first filter part 311 mainly plays a filtering role.

[0060] The utility model connects the second filter part 312 with the drain nozzle 10 , and the second filter part 312 can be clamped in the drain nozzle 10 , or the second filter part 312 and the drain nozzle 10 can be sealed and connected.

[0061] Optionally, part of the second filter part 312 is inserted into the interior of the drain nozzle 10, and an opening 32 is formed at one end of the second filter part 312 away from the first filter part 311, and a limiting plate 33 is provided on the circumferential edge of the opening 32, and the limiting plate 33 and the outlet end 12 of the drain nozzle 10 are limitedly matched.

[0062] Here, part of the second filter part 312 is arranged outside the drain nozzle 10, so that both the first filter part 311 and part of the second filter part 312 can have filtering functions, increasing the water inlet area, thereby improving the filtering efficiency of condensed water.

[0063] It should be noted that the flow area of ​​the opening 32 here can be the same as the flow area of ​​the second filter part 312, or it can be smaller than the flow area of ​​the second filter part 312. In the present utility model, the flow area of ​​the opening 32 is the same as the flow area of ​​the second filter part 312.

[0064] Alternatively, if Figure 5 and Figure 6 As shown, the limiting plate 33 here can be a structure arranged at intervals, such as using a plurality of arc-shaped plates arranged at intervals, or a continuous structure, such as a circular plate-shaped structure. Regardless of which structure, the limiting plate 33 and the drain nozzle 10 can be matched to each other.

[0065] Optionally, the limiting plate 33 is an annular plate, which may be a circular annular plate or annular plates of other shapes, such as a rectangular annular plate or structures of other shapes.

[0066] like Figure 7 As shown, Figure 7 for Figure 1 Schematic diagram of the assembly structure of the filter element 30 and the drain nozzle 10 of the drain assembly 100 shown in FIG. The drain nozzle 10 is a tubular structure, and at least part of the drain nozzle 10 is sleeved in the delivery pipeline 20, wherein at least part of the limit plate 33 abuts against the outlet end 12 of the drain nozzle 10.

[0067] The drainage assembly 100 in the utility model can realize the limited installation of the filter element 30 in the drainage nozzle 10 by sleeve-fitting the drainage nozzle 10 into the delivery pipeline 20 and abutting at least part of the limiting plate 33 against the outlet end 12 of the drainage nozzle 10, thereby realizing the quick installation of the filter element 30.

[0068] During installation, the filter net 31 is inserted into the drain nozzle 10 from the outlet end 12 of the drain nozzle 10, that is, the filter net 31 is inserted into the drain nozzle 10 from the end of the drain nozzle 10 away from the inside of the water receiving tray 200. When the limiting plate 33 and the outlet end 12 of the drain nozzle 10 are abutted, the installation of the filter element 30 is completed.

[0069] Optionally, the drain nozzle 10 and the second filter portion 312 are interference fit, that is, after the filter element 30 is inserted into the drain nozzle 10, at least a portion of the second filter portion 312 can be interference fit with the drain nozzle 10, thereby reducing the probability of the filter element 30 moving during use.

[0070] Optionally, the drain nozzle 10 and the second filter portion 312 are sealed to reduce the probability of water leakage of the drain assembly 100, and a sealing ring or other sealing methods may be used.

[0071] It is understandable that the drain nozzle 10 and the delivery pipe 20 are separate structures, and the drain nozzle 10 and the delivery pipe 20 are sealed and connected to reduce the probability of water leakage from the connection position of the drain nozzle 10 and the delivery pipe 20. The drain nozzle 10 and the delivery pipe 20 here can be connected by threads, and the contact surface of the drain nozzle 10 and the delivery pipe is connected by a sealing structure, such as a sealing ring or a stepped sealing surface. Among them, the sealing ring can be installed in an embedded installation manner.

[0072] Alternatively, if Figures 1 to 4As shown, the delivery pipeline 20 includes a first pipeline 21, a second pipeline 22, and a third pipeline 23 which are sequentially connected to each other, wherein the first pipeline 21 is connected to the drain nozzle 10, and the flow area of ​​the first pipeline 21 is larger than the flow area of ​​the second pipeline 22. In addition, the flow area of ​​the first pipeline 21 is also larger than the flow area of ​​the third pipeline 23. That is to say, the flow area of ​​the first pipeline 21 is the largest among the multiple pipelines in the delivery pipeline 20.

[0073] In addition, the third pipeline 23 here can be a straight pipe section or a curved pipe. In the present utility model, the third pipeline 23 is a curved pipe structure, so that the internal space of the HVAC equipment 1000 can be fully utilized, making the layout of the HVAC equipment 1000 more compact.

[0074] When the delivery pipeline 20 is a circular tube structure, the first pipeline 21, the second pipeline 22 and the third pipeline 23 are all circular structures, wherein the second pipeline 22 is a reducer, the large end of the second pipeline 22 is connected to the first pipeline 21, and the small end of the second pipeline 22 is connected to the third pipeline 23. The second pipeline 22 here can be a reducer of a regular shape or a structure of other shapes, wherein the flow area of ​​the large end of the second pipeline 22 is larger than the flow area of ​​the small end.

[0075] It should be emphasized that here, the flow area of ​​the first pipeline 21 is set to the maximum, which can increase the water inlet area of ​​the delivery pipeline 20, so that the drainage component 100 can have a higher drainage efficiency.

[0076] Optionally, the delivery pipeline 20 is a circular pipe, and the second pipeline 22 is a reducer pipe. These are common structures and will not be described in detail here.

[0077] Alternatively, if Figures 1 to 4 As shown, the drainage component 100 also includes a valve 50, which is arranged in the delivery pipeline 20, and the valve 50 is located on the downstream side of the power pump 40. Of course, the valve 50 here can also be arranged on the upstream side of the power pump 40, so as to control the on and off of the drainage component 100.

[0078] Continue to refer to Figure 4 As shown, the output port of the valve 50 can be connected to an external water tank or the like to realize the recycling and reuse of condensed water, or the water can be directly discharged into the environment through a pipeline.

[0079] The valve 50 here can be a one-way valve, which can only realize the one-way flow of condensed water and realize the discharge of condensed water. The valve 50 can be closed when there is no need to discharge the condensed water.

[0080] The second aspect of the present invention provides a HVAC device 1000, such as Figure 8As shown, Figure 8 The schematic diagram of the structure of the HVAC equipment 1000 according to the embodiment of the utility model is schematically shown. The HVAC equipment 1000 comprises the drainage assembly 100 mentioned in the above embodiment and a water receiving pan 200 for collecting condensed water. The drainage assembly 100 is used to discharge condensed water.

[0081] During the operation of the HVAC equipment 1000, condensed water will be generated on the surface of the evaporator component. In order to prevent the condensed water from dripping directly onto the outside of the HVAC equipment 1000, the water receiving tray 200 is located under the evaporator component to collect the condensed water precipitated from the evaporator component.

[0082] Optionally, the HVAC equipment 1000 further includes a shell 300 and a base 400, wherein the base 400 is disposed at the bottom of the HVAC equipment 1000, and the shell 300 and the base 400 enclose a space for accommodating a water tray 200, a drainage assembly 100, and evaporator components.

[0083] The HVAC equipment 1000 includes but is not limited to a wall-mounted air conditioner, a floor-standing air conditioner, an integrated air conditioner, etc. Among them, the wall-mounted air conditioner includes a horizontally mounted air conditioner and a vertically mounted air conditioner.

[0084] The specific structure of the HVAC equipment 1000 refers to the above embodiments. Since the HVAC equipment 1000 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0085] For the structures of other parts of the utility model, please refer to the prior art, and this application will not elaborate on them here.

[0086] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A drainage assembly for a HVAC device, the HVAC device comprising a water receiving pan for collecting condensed water, characterized in that: The drainage assembly comprises: A drainage nozzle, the inlet end of which can be plugged into the water receiving tray; A delivery pipeline, the delivery pipeline is connected to the outlet end of the drain nozzle; a filter element, at least one of the drain nozzle and the delivery pipeline is provided with the filter element; and A power pump is arranged in the delivery pipeline and is used to pump the condensed water in the water receiving tray out through the delivery pipeline.

2. The drainage assembly according to claim 1, characterized in that: The filter element is disposed on the drain nozzle, and the filter element includes a filter net, at least a portion of the filter net protrudes from the inlet end of the drain nozzle.

3. The drainage assembly according to claim 2, characterized in that: The filter net includes a first filter part and a second filter part connected to each other, the first filter part is a planar structure, the second filter part is an annular structure arranged along the edge of the first filter part, the second filter part is connected to the drain nozzle, and the first filter part is arranged outside the drain nozzle and spaced apart from the drain nozzle.

4. The drainage assembly according to claim 3, characterized in that: Part of the second filter part is inserted into the drainage nozzle, and an opening is formed at one end of the second filter part away from the first filter part. A limiting plate is provided on the circumferential edge of the opening, and the limiting plate is limitedly matched with the outlet end of the drainage nozzle.

5. The drainage assembly according to claim 4, characterized in that: The drainage nozzle is a tubular structure, and at least a portion of the drainage nozzle is sleeved in the delivery pipeline.

6. The drainage assembly according to claim 4, characterized in that: The limiting plate is an annular plate.

7. The drainage assembly according to claim 4, characterized in that: The drainage nozzle is interference-fitted with the second filter portion.

8. The drainage assembly according to claim 4, characterized in that: The drainage nozzle is sealed and connected to the second filter portion.

9. The drainage assembly according to claim 1, characterized in that: The delivery pipeline includes a first pipeline, a second pipeline and a third pipeline which are sequentially connected to each other; wherein the first pipeline is connected to the drain nozzle, and the flow area of ​​the first pipeline is larger than the flow area of ​​the second pipeline and larger than the flow area of ​​the third pipeline.

10. A HVAC equipment, characterized in that: The HVAC equipment includes: a drain pan for collecting condensed water; And the drainage assembly according to any one of claims 1 to 9, wherein the drainage nozzle is inserted into the water receiving tray and communicates with the interior of the water receiving tray.