A lower housing assembly of an automobile air-conditioning evaporator

Abstract

The present invention discloses a lower housing assembly of an automobile air conditioner evaporator, and relates to the technical field of automobile air conditioners. The assembly comprises an evaporator lower housing, the evaporator lower housing has an upwardly opening accommodation cavity, and a drainage port is arranged on the outer side of the side wall; a water collecting tank connected to the drainage port is arranged at the bottom of the accommodation cavity; and a water receiving tray, which is a long straight groove structure with two ends open, and a plurality of drainage holes are arranged at the bottom; the upper ends of the groove walls on both sides of the water receiving tray are folded outward to form a first flange and a second flange respectively, and a plurality of protrusions spaced along the length direction thereof are arranged on the lower side of the first flange; a front support platform for supporting the first flange and a rear support platform for supporting the second flange are arranged on both sides of the water collecting tank, and a groove matching with the protrusions one by one is arranged on the front support platform, and a block matching with the rear support platform up and down is arranged on the inner wall of the accommodation cavity. The present invention overcomes the problem of poor drainage effect of the drainage port of the automobile air conditioner, and optimizes the design space of the whole vehicle.

Description

Technical Field

[0001] The invention relates to the technical field of automobile air conditioners, in particular to an automobile air conditioner evaporator lower shell assembly. Background Art

[0002] Car air conditioners are mainly used to adjust and control the temperature, humidity, air cleanliness and air flow in the car compartment to the best state, provide passengers with a comfortable riding environment, reduce travel fatigue, create good working conditions for drivers, and play an important role in ensuring safe driving. With the development of the automobile industry, now cars, not only sedans, minibuses, and buses are generally equipped with car air conditioning systems, but also trucks, which are also installed on many models. Therefore, car air conditioners and their accessories have now become one of the necessary accessories for automobile manufacturing.

[0003] The automobile air conditioner installed in the truck mainly includes a blower, a heater core, an evaporator core and a corresponding outer shell. Among them, the evaporator core is generally installed in the evaporator lower shell. During the operation of the air conditioner, a large amount of condensed water will be generated on the surface of the evaporator core and flow into the evaporator lower shell at the lower end of the evaporator core. In order to avoid water accumulation at the lower end of the evaporator core, a common method is to design the drain port directly at the bottom of the evaporator lower shell at the lower end of the evaporator core to discharge the corresponding condensed water in time. However, this design causes the automobile air conditioner to occupy more space in the whole vehicle, and the layout of the parts of the whole vehicle is restricted, which in turn leads to a reduction in the design space around the whole vehicle.

[0004] For example, a Chinese patent, authorization announcement number: CN 203837224 U, authorization announcement date: 2014.09.17, discloses a drainage structure at the bottom of an evaporator core of an automobile air-conditioning box, including an air-conditioning box shell, an evaporator core bottom, a cavity, and a drainage hole. The bottom of the evaporator core is appropriately raised to increase the gap between the two sides of the bottom of the evaporator core and the air-conditioning box shell, and a water baffle is arranged in the increased cavity; the water baffle is a stepped structure that is narrow at the top and wide at the bottom, and includes a top layer, a fixed edge, a water guide edge, and a notch. The water baffle is fixedly connected to the air-conditioning box shell through the lower end of the fixed edge, the evaporator core bottom is arranged on the top layer of the water baffle, and a plurality of notches are arranged on the water guide edge. Summary of the invention

[0005] Technical problem to be solved by the invention

[0006] In view of the problem that the drain outlet on the evaporator shell in the existing automobile air conditioner is set at the bottom of the evaporator core, resulting in limited design space for the entire vehicle, the present invention provides an automobile air conditioner evaporator lower shell assembly, which improves the structure of the evaporator lower shell and adds a water receiving pan to cooperate with it. While realizing the side outlet of the automobile air conditioner drain outlet, it ensures smooth drainage and optimizes the design space of the entire vehicle.

[0007] Technical Solution

[0008] To solve the above problems, the technical solution provided by the present invention is:

[0009] A lower shell assembly of an automobile air-conditioning evaporator comprises an evaporator lower shell, wherein the evaporator lower shell has a accommodating cavity with an opening facing upward and a drain outlet is arranged on the outer side of the side wall; a water collecting trough connected to the drain outlet is arranged at the bottom of the accommodating cavity; and a water collecting pan, which is a long straight trough structure with open ends and a plurality of drainage holes arranged at the bottom; the water collecting pan is arranged on the water collecting trough and is used to keep the lower end of the evaporator installed therein away from the bottom of the water collecting trough.

[0010] Furthermore, the upper ends of the groove walls on both sides of the water receiving tray are folded outward to form a first flange and a second flange respectively, and the lower side of the first flange is provided with a plurality of protrusions spaced along the length direction thereof; the two sides of the water collecting tank are respectively provided with a front support platform for supporting the first flange and a rear support platform for supporting the second flange, and the front support platform is provided with a groove that matches the protrusions one by one, and the inner wall of the accommodating cavity is provided with a stopper that matches the rear support platform up and down. When installing the water receiving tray, the second flange is first inserted between the rear support platform and the stopper, and then the protrusion is inserted into the corresponding groove. The water receiving tray can only be separated from the lower shell of the evaporator by turning it upward, but since the evaporator is inserted into the water receiving tray and docked with the water tray, the docking water tray is turned upward to form a block. At this time, it is only necessary to fix the upper end of the evaporator to achieve relative fixation between the water receiving tray and the lower shell of the evaporator.

[0011] Furthermore, the front support platform is provided with a plurality of front drainage grooves leading to the bottom of the water collecting tank; the water receiving tray is provided with a plurality of ridges on the outer side of the groove wall on the same side of the first flange, and the ridges extend vertically from the mouth of the water receiving tray to the bottom; every two ridges are arranged adjacent to each other and correspond to the two sides of the corresponding front drainage grooves. After such arrangement, supported by the ridges, a gap can be left between the outer wall of the water receiving tray and the side wall of the water collecting tank to increase the drainage speed of the front drainage groove, thereby ensuring that the condensed water on the front side of the lower shell of the evaporator is quickly discharged into the water collecting tank.

[0012] Furthermore, the rear support platforms are arranged in multiple intervals, and a rear drainage groove is provided between two adjacent rear support platforms; the second flange is provided with a plurality of drainage notches, and the drainage notches correspond to the rear drainage grooves one by one. In this way, the condensed water on the rear side of the lower shell of the evaporator can flow through the drainage notches through the rear drainage grooves and enter the water collection tank, increasing the unit flow rate of the condensed water on the leeward side of the evaporator flowing to the water collection tank, thereby ensuring that the condensed water on the rear side of the lower shell of the evaporator is quickly discharged into the water collection tank.

[0013] Furthermore, drainage ribs for guiding the flow of condensed water are provided on the side walls of the accommodating cavity located in the rear drainage groove, so as to achieve uniform diversion of the condensed water in the rear drainage groove.

[0014] Furthermore, reinforcing ribs are provided between the lower side of the second flange and the outer side of the water receiving tray groove wall, and the reinforcing ribs are staggered with the drainage notches, so that the second flange has sufficient strength and is not easily deformed when the drainage notches exist.

[0015] Furthermore, the drainage holes are evenly distributed along the length direction of the water receiving tray and are divided into several rows along the width direction of the water receiving tray. The drainage holes distributed in this way can cover the entire lower end of the evaporator, thereby timely draining the condensed water flowing into the water receiving tray from various parts of the evaporator, thereby optimizing the drainage effect.

[0016] Furthermore, the bottom of the water receiving tray is also provided with a supporting ridge extending along its length direction for supporting the lower end of the evaporator so that a water flow channel is reserved between the lower end of the evaporator and the bottom of the water receiving tray.

[0017] Furthermore, there are at least two supporting ridges, which are arranged parallel to each other to provide stable support for the evaporator.

[0018] Furthermore, there are two drain ports, both of which are arranged on the front side of the lower shell of the evaporator, and the left and right ends of the water collecting tank are respectively connected to the corresponding drain ports through side flow channels on both sides.

[0019] Beneficial Effects

[0020] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0021] (1) The present invention provides an automobile air-conditioning evaporator lower shell assembly, in which a drain port is arranged on the side of the evaporator lower shell, and a water collecting tank is arranged in the accommodating cavity to communicate with the drain port, so that condensed water flows into the accommodating cavity along the evaporator and then is discharged from the drain port along the water collecting tank; a drain pipe connected to the drain port is directly led out from the side of the evaporator lower shell, and there is no need to arrange the drain pipe on the lower side of the evaporator lower shell, thereby optimizing the peripheral design space of the whole vehicle; at the same time, the water receiving tray is used to lift the evaporator so that its lower end is away from the bottom of the water collecting tank, thereby avoiding the lower end of the evaporator blocking the condensed water from flowing along the water collecting tank to the drain port, ensuring smooth drainage, and overcoming the technical problem of poor drainage effect at the drain port;

[0022] (2) The present invention provides an automobile air-conditioning evaporator lower housing assembly, in which the water receiving tray and the evaporator lower housing are matched with each other by a mutually clamped structure, which is as reliable as screw fixing and has higher assembly efficiency than screw connection and other methods. At the same time, the evaporator lower housing and the water receiving tray themselves will not be damaged during disassembly;

[0023] (3) The present invention provides an automobile air-conditioning evaporator lower shell assembly, which ensures that the condensed water generated on the windward side and the leeward side of the evaporator and the inner wall of the evaporator shell can be quickly discharged into the water collection tank after falling on the evaporator lower shell by making the above-mentioned improvements to the structures of the water receiving tray and the evaporator lower shell. In this way, even when the air conditioner is operated under harsh working conditions, a large amount of condensed water generated by the evaporator can be discharged in time, thereby preventing the phenomenon of water blowing from the air outlet of the air conditioner;

[0024] (4) The present invention provides an automobile air-conditioning evaporator lower housing assembly, which can evenly distribute the condensed water in each rear drainage groove by arranging drainage ribs in the rear drainage groove, thereby avoiding the occurrence of water accumulation on one side;

[0025] (5) The lower housing assembly of an automobile air-conditioning evaporator provided by the present invention effectively realizes the rapid diversion and discharge of condensed water entering the water receiving tray into the water collecting tank by arranging drainage holes and supporting edges in the water receiving tray, and has good drainage performance;

[0026] (6) The present invention provides an automobile air-conditioning evaporator lower shell assembly, which is provided with two drain outlets, doubling the drainage volume. After the automobile air-conditioning drain pipe is connected to the drain outlet, it can be arranged along the left and right side walls of the automobile air-conditioning and led out of the vehicle, which will not affect the layout of the components of the entire vehicle, thereby greatly optimizing the design space of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the lower shell assembly of the evaporator;

[0028] Figure 2 It is a structural schematic diagram of the lower shell of the evaporator;

[0029] Figure 3 Schematic diagram of the structure of the lower shell of the evaporator

[0030] Figure 4 It is a structural schematic diagram of the water receiving tray;

[0031] Figure 5 It is a schematic diagram of the bottom structure of the water receiving tray;

[0032] Figure 6 is a side view of the water tray;

[0033] Figure 7 It is a schematic diagram of the coordination between the evaporator and the water receiving tray;

[0034] In the attached drawings: 1, water receiving tray; 11, first flange; 12, second flange; 13, drainage hole; 14, supporting edge; 15, drainage notch; 16, protrusion; 17, convex edge; 18, reinforcing rib;

[0035] 2. Evaporator lower shell; 20. Accommodating chamber; 21. Water collecting tank; 211. Side flow channel; 22. Drainage outlet; 23. Front support platform; 24. Rear support platform; 25. Groove; 26. Block; 27. Front drainage groove; 28. Rear drainage groove; 29. ​​Drainage retaining rib;

[0036] 100. Evaporator. DETAILED DESCRIPTION

[0037] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and facilitating its implementation.

[0038] Example 1

[0039] like Figure 1 As shown in the figure, a lower housing assembly of an automobile air-conditioning evaporator in this embodiment includes an evaporator lower housing 2 and a water collecting pan 1; the evaporator lower housing 2 has a receiving chamber 20 with an opening facing upward, and a drain port 22 is arranged on the outer side of the side wall; a water collecting trough 21 connected to the drain port 22 is arranged at the bottom of the receiving chamber 20; the water collecting pan 1 is a long straight trough structure with open ends, and a plurality of drainage holes 13 are arranged at the bottom; the water collecting pan 1 is arranged on the water collecting trough 21, and is used to keep the lower end of the evaporator 100 installed therein away from the bottom of the water collecting trough 21. During actual assembly, as shown in FIG. Figure 1 As shown in FIG. 1 , the water receiving tray 1 is first installed on the water collecting tank 21 in the lower shell 2 of the evaporator, and then Figure 7 As shown in , the lower end of the evaporator 100 is inserted into the water receiving tray 1 , and the upper end of the evaporator 100 is fixed at the same time. After installation, the evaporator 100 is in a state of tilting toward the front side.

[0040] In traditional automobile air conditioners, in order to avoid water accumulation at the lower end of the evaporator, a common method is to design the drain outlet directly at the bottom of the evaporator lower shell at the lower end of the evaporator to discharge the corresponding condensed water in time. On the whole vehicle, in order to take into account the space and parts layout of the whole vehicle, the drain pipe outlet is generally not directly below the evaporator lower shell, which means that the drain pipe needs to go from the bottom of the evaporator lower shell to the drain pipe outlet on the whole vehicle. Therefore, when designing the whole vehicle, it is necessary to reserve space for the drain pipe arrangement under the evaporator lower shell. This design of automobile air conditioner takes up more space in the whole vehicle, resulting in limited layout of parts of the whole vehicle, which in turn leads to a reduction in the design space around the whole vehicle.

[0041] The automobile air-conditioning evaporator lower shell assembly in this embodiment sets the drain port 22 on the side of the evaporator lower shell 2, and sets a water collecting tank 21 in the accommodating chamber 20 to communicate with it, so that condensed water flows into the accommodating chamber 20 along the evaporator 100 and is discharged from the drain port 22 along the water collecting tank 21; the drain pipe connected to the drain port 22 is directly led out from the side of the evaporator lower shell 2, and there is no need to arrange the drain pipe on the lower side of the evaporator lower shell 2, thereby optimizing the peripheral design space of the whole vehicle; at the same time, the water receiving tray 1 is used to lift the evaporator 100 so that its lower end is away from the bottom of the water collecting tank 21, so as to avoid the lower end of the evaporator 100 hindering the condensed water from flowing along the water collecting tank 21 to the drain port 22, thereby ensuring smooth drainage and overcoming the technical problem of poor drainage effect at the side of the drain port.

[0042] Specifically, Figure 1 , Figure 2 and Figure 3 As shown in , there are two drain ports 22 in this embodiment, and both are arranged on the front side of the lower shell 2 of the evaporator. The left and right ends of the water collecting tank 21 are connected to the corresponding drain ports 22 through the side flow channels 211 on both sides. The traditional bottom drainage automobile air conditioner is limited by the space of the whole vehicle, and generally can only have one drain port. Although the drain port of this design is located below the evaporator and can directly discharge the condensed water falling from the evaporator, the unit displacement is limited. In this embodiment, two drain ports 22 are arranged, and the drainage capacity is doubled. After the automobile air conditioner drain pipe is connected to the drain port 22, it can be arranged close to the left and right side walls of the automobile air conditioner and led out of the vehicle, which will not affect the layout of the components of the whole vehicle, and greatly optimizes the design space of the whole vehicle.

[0043] Example 2

[0044] The automobile air-conditioning evaporator lower shell assembly in this embodiment has the same basic structure as that in Embodiment 1, except that the structures of the water receiving tray 1 and the evaporator lower shell 2 are improved to facilitate the installation and fixation of the water receiving tray 1 and improve assembly efficiency.

[0045] Specifically, Figure 4 and Figure 6 As shown in , the upper ends of the groove walls on both sides of the water receiving tray 1 are folded outward to form a first flange 11 and a second flange 12 respectively, and the lower side of the first flange 11 is provided with a plurality of protrusions 16 spaced apart along its length direction; at the same time, as shown in Figure 2 As shown in the figure, a front support platform 23 for supporting the first flange 11 and a rear support platform 24 for supporting the second flange 12 are respectively provided on both sides of the water collecting trough 21, and a groove 25 that matches the protrusion 16 one by one is provided on the front support platform 23, and a stopper 26 that matches the rear support platform 24 up and down is provided on the inner wall of the accommodating cavity 20.

[0046] Traditional automotive air-conditioning components are generally fixed together with bolts. The main reason is that the overall vibration is large during the driving of the car. If they are not fixed firmly, it is easy for the components to collide and be damaged.

[0047] In the present embodiment, the water receiving pan 1 and the evaporator lower shell 2 are assembled by mutually snapping together. When installing the water receiving pan 1, the second flange 12 is first snapped into between the rear support platform 23 and the stopper 26, and then the protrusion 16 is snapped into the corresponding groove 25. The water receiving pan 1 can only be detached from the evaporator lower shell 2 by flipping upward. However, since the evaporator 100 is snapped into the water receiving pan 1 and then the water pan 1 is flipped upward to form an obstruction, at this time, it is only necessary to fix the upper end of the evaporator 100 to achieve relative fixation between the water receiving pan 1 and the evaporator lower shell 2. It has been verified that this method is as reliable as screw fixing, and has higher assembly efficiency than screw connection and other methods. At the same time, the evaporator lower shell 2 and the water receiving pan 1 itself will not be damaged during disassembly.

[0048] Example 3

[0049] The automobile air-conditioning evaporator lower shell assembly in this embodiment has the same basic structure as that in Embodiment 1 or 2, except that the structures of the water receiving tray 1 and the evaporator lower shell 2 are further improved.

[0050] Specifically, Figure 2 and Figure 3 As shown in , the front support platform 23 is provided with a plurality of front drainage grooves 27 leading to the bottom of the water collecting tank 21; Figure 5 As shown in , the water receiving pan 1 is provided with a plurality of ridges 17 on the outer side of the groove wall on the same side of the first flange 11, and the ridges 17 extend vertically from the mouth of the water receiving pan 1 to the bottom; every two ridges 17 are arranged adjacent to each other and correspond to the two sides of the corresponding front drainage groove 27. After such arrangement, supported by the ridges 17, a gap can be left between the outer wall of the water receiving pan 1 and the side wall of the water collecting groove 21 to increase the drainage speed of the front drainage groove 27, thereby ensuring that the condensed water on the front side of the lower shell 2 of the evaporator is quickly discharged into the water collecting groove 21.

[0051] At the same time, if Figure 2 As shown in , the rear support platform 24 is distributed in multiple intervals, and a rear drainage groove 28 is provided between two adjacent rear support platforms 24; Figure 4As shown in , the second flange 12 is provided with a plurality of drainage notches 15, and the drainage notches 15 correspond to the rear drainage grooves 28 one by one. In this way, the condensed water on the rear side of the evaporator lower shell 2 can flow through the drainage notches 15 and the rear drainage grooves 28 to enter the water collecting tank 21, increasing the unit flow rate of the condensed water on the leeward side of the evaporator 100 flowing to the water collecting tank 21, thereby ensuring that the condensed water on the rear side of the evaporator lower shell 2 is quickly discharged into the water collecting tank 21. In this embodiment, Figure 5 As shown in the figure, a reinforcing rib 18 is arranged between the lower side of the second flange 12 and the outer side of the groove wall of the water receiving tray 1, and the reinforcing rib 18 is staggered with the drainage notch 15, so that the second flange 12 has sufficient strength and is not easy to deform when the drainage notch 15 exists.

[0052] The automobile air-conditioning evaporator lower shell assembly in the present embodiment, by making the above-mentioned improvements to the structures of the water receiving tray 1 and the evaporator lower shell 2, ensures that the condensed water generated on the windward and leeward sides of the evaporator 100 and the inner wall of the evaporator shell can be quickly discharged into the water collecting tank 21 after falling onto the evaporator lower shell 2. In this way, even when the air conditioner is operated under harsh working conditions, a large amount of condensed water generated by the evaporator 100 can be discharged in time, thereby preventing water from blowing out of the air outlet of the air conditioner.

[0053] In addition, if Figure 2 As shown in , the side walls of the accommodating cavity 20 located in the rear drainage groove 28 are provided with drainage ribs 29 for guiding the flow of condensed water. In this embodiment, there are four drainage ribs 29, which are symmetrically arranged on the left and right sides; the two drainage ribs 29 located on both sides have the same structure, and are both bent from the middle and the two sides extend obliquely downward on both sides, so as to realize the diversion of the condensed water in the corresponding rear drainage groove 28 to the two sides of the drainage rib 29; the two drainage ribs 29 located in the middle are the upper ends of which are attached to the side walls of the rear support platform 24, and the lower ends are straight-line structures that are downward and inclined toward each other, so as to divert the condensed water in the corresponding rear drainage groove 28 to the middle of the evaporator lower shell 2; such a design can make the condensed water in each rear drainage groove 28 evenly distributed, avoiding the occurrence of water accumulation on one side.

[0054] Example 4

[0055] The lower housing assembly of an automobile air-conditioning evaporator in this embodiment has the same basic structure as any one of Embodiments 1 to 3, except that the structure of the water receiving tray 1 is further optimized.

[0056] Specifically, Figure 4As shown in , the drainage holes 13 are evenly distributed along the length direction of the water receiving tray 1, and are divided into several rows along the width direction of the water receiving tray 1. The drainage holes 13 distributed in this way can cover the entire lower end of the evaporator 100, so as to timely discharge the condensed water flowing into the water receiving tray 1 from various parts of the evaporator 100, and optimize the drainage effect.

[0057] In addition, if Figure 4 As shown in , the bottom of the water receiving tray 1 is also provided with a supporting ridge 14 extending along its length direction, which is used to support the lower end of the evaporator 100, so that a water flow channel is reserved between the lower end of the evaporator 100 and the bottom of the water receiving tray 1. When too much water accumulates at a certain position in the water receiving tray 1 and cannot be discharged from the corresponding drainage hole 13, the accumulated water can flow to the adjacent drainage hole 13 and the two ends of the water receiving tray 1 in time, thereby avoiding local water accumulation and further improving the drainage efficiency. There are at least two supporting ridges 14, which are arranged parallel to each other to provide stable support for the evaporator 100.

[0058] In this embodiment, Figure 4 As shown in the figure, the drainage holes 13 are arranged in two rows and are respectively located on both sides of the bottom of the water receiving tray 1, and the drainage holes 13 on both sides are staggered in the length direction of the water receiving tray 1; there are two supporting edges 14, and the two supporting edges 14 are located between the two rows of drainage holes 13. The condensed water on both sides of the two supporting edges 14 in the water receiving tray 1 is discharged from the corresponding drainage holes 13 and the two ends of the water receiving tray 1, and the condensed water between the supporting edges 14 in the water receiving tray 1 is discharged from the two ends of the water receiving tray 1, and the drainage performance is better.

[0059] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A lower housing assembly of an automobile air-conditioning evaporator, characterized in that: include An evaporator lower shell (2), the evaporator lower shell (2) having a receiving chamber (20) with an opening facing upward, and a drainage port (22) provided on the outer side of the side wall; a water collecting tank (21) communicating with the drainage port (22) is provided at the bottom of the receiving chamber (20); and The water receiving tray (1) is in the form of a long straight groove with both ends open, and a plurality of drainage holes (13) are arranged at the bottom; The water receiving tray (1) is arranged on the water collecting tank (21) and is used to keep the lower end of the evaporator (100) installed therein away from the bottom of the water collecting tank (21); the lower end of the evaporator (100) is inserted into the water receiving tray (1); The upper ends of the groove walls on both sides of the water receiving tray (1) are folded outwards to form a first flange (11) and a second flange (12) respectively, and the lower side of the first flange (11) is provided with a plurality of protrusions (16) distributed at intervals along its length direction; A front support platform (23) for supporting the first flange (11) and a rear support platform (24) for supporting the second flange (12) are respectively provided on both sides of the water collecting trough (21); a groove (25) which matches the protrusion (16) one by one is provided on the front support platform (23); and a stopper (26) which matches the rear support platform (24) up and down is provided on the inner wall of the accommodating cavity (20).

2. The lower housing assembly of the automobile air-conditioning evaporator according to claim 1, characterized in that: The front support platform (23) is provided with a plurality of front drainage grooves (27) leading to the bottom of the water collecting groove (21); the outer side of the groove wall of the water receiving tray (1) located on the same side as the first flange (11) is provided with a plurality of ridges (17), the ridges (17) extending vertically from the mouth of the water receiving tray (1) to the bottom; every two ridges (17) are arranged adjacent to each other and correspond to the two sides of the corresponding front drainage grooves (27).

3. The automobile air-conditioning evaporator lower housing assembly according to claim 2, characterized in that: The rear support platforms (24) are arranged in a plurality and spaced apart arrangement, and a rear drainage groove (28) is provided between two adjacent rear support platforms (24); a plurality of drainage notches (15) are provided on the second flange (12), and the drainage notches (15) correspond one-to-one to the rear drainage grooves (28).

4. The automobile air-conditioning evaporator lower housing assembly according to claim 3, characterized in that: Drainage ribs (29) for guiding the flow of condensed water are provided on the side walls of the accommodating cavity (20) located in the rear drainage groove (28).

5. The automobile air-conditioning evaporator lower housing assembly according to claim 4, characterized in that: A reinforcing rib (18) is provided between the lower side of the second flange (12) and the outer side of the groove wall of the water receiving tray (1), and the reinforcing rib (18) and the drainage notch (15) are arranged in a staggered manner.

6. The automobile air-conditioning evaporator lower housing assembly according to claim 4, characterized in that: The drainage holes (13) are evenly distributed along the length direction of the water receiving tray (1), and are divided into a plurality of rows along the width direction of the water receiving tray (1).

7. The automobile air-conditioning evaporator lower housing assembly according to claim 6, characterized in that: The bottom of the water receiving tray (1) is also provided with a supporting ridge (14) extending along its length direction.

8. The automobile air-conditioning evaporator lower housing assembly according to claim 7, characterized in that: The supporting edges (14) are at least two and are arranged parallel to each other.

9. The automobile air-conditioning evaporator lower housing assembly according to any one of claims 1 to 8, characterized in that: There are two drain ports (22), both of which are arranged on the front side of the lower shell (2) of the evaporator, and the left and right ends of the water collecting tank (21) are respectively connected to the corresponding drain ports (22) through the side flow channels (211) on both sides.

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