Power vehicle air conditioning return air system adaptable to variable-section air duct and power vehicle

Abstract

The present invention relates to a power vehicle air conditioning return air system that can adapt to variable-section air ducts, comprising: a return air device, which is installed on a partition wall in a driver's cab; an air duct cavity, which is arranged in the partition wall and communicated with the return air device; an air conditioning unit, which is installed behind the partition wall; an evaporator cavity, which is arranged in the air conditioning unit and is aligned with and communicated with the air duct cavity; an evaporator, which is installed in the evaporator cavity; a sealing strip, which seals and connects the partition wall, the air duct cavity, the air conditioning unit, and the evaporator cavity; a guide plate, which is located in the air duct cavity and distributes the direction and flow of air from the return air device; and a partition wall device, which is installed on the partition wall and located above the return air device. The present invention adjusts the direction and flow of air by arranging a guide plate in the air duct cavity, thereby completely solving the problem of ice formation or even blockage caused by uneven air volume on the surface of the air conditioning evaporator, avoiding the occurrence of air conditioning shutdown after the evaporator freezes, and improving the operating reliability of the air conditioning.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle air conditioning, and more specifically, relates to a power vehicle air conditioning return air system adaptable to variable-section air ducts and a power vehicle comprising the system. Background Art

[0002] At present, the air conditioner in the driver's cab of a centralized power EMU is installed in the machinery room. It is necessary to use a return air device and air duct to allow the air in the driver's cab to flow to the air conditioner evaporator for heat exchange, thereby cooling the driver's cab.

[0003] Due to the influence of the overall layout of the power vehicle, the return air duct is usually of variable cross-section, that is, there is a height difference between the inlet and outlet (evaporator) of the air duct in the vertical direction. After the air enters the air duct cavity, it mainly flows through the middle and lower part of the evaporator. Based on the knowledge of aerodynamics, the flow characteristic of air is to flow to the place with less resistance. As a result, only a small amount of air will flow through the top of the evaporator. After a long time, the temperature of the top of the evaporator will usually become lower and lower due to insufficient air for heat exchange, and then icing may occur, which will eventually lead to a decrease in the cooling ability of the air conditioner and affect the driver's driving comfort.

[0004] Therefore, the existing technology needs to be improved. Summary of the Invention

[0005] To address these issues, the present invention provides a power vehicle air conditioning return air system that can adapt to variable-section air ducts. By installing a deflector within the air duct cavity, the system regulates the direction and volume of air flow, completely resolving the problem of uneven air flow on the air conditioner evaporator surface, which can lead to icing and even blockage.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] According to aspects of the present invention, there is provided a power vehicle air conditioning return air system adaptable to variable cross-section air ducts, comprising:

[0008] Return air device, which is installed on the partition wall;

[0009] an air duct cavity, which is arranged in the partition wall and communicated with the return air device;

[0010] Air conditioning unit, which is installed behind the partition wall;

[0011] an evaporator cavity, the evaporator cavity being disposed in the air conditioning unit and aligned with and in communication with the air duct cavity;

[0012] an evaporator mounted in the evaporator chamber;

[0013] a sealing strip that seals and connects the partition wall, the air duct cavity, the air conditioning unit, and the evaporator cavity;

[0014] A guide plate is located in the air duct cavity and distributes the flow direction and flow rate of the air from the return air device;

[0015] A partition wall device is installed on the partition wall and positioned above the return air device.

[0016] In one embodiment of the present invention, the return air device is installed on the partition wall through a mounting frame and bolts.

[0017] In one embodiment of the present invention, the return air device includes a filter, which is installed on a filter installation slot. The filter installation slot is set at an angle α to the partition wall, where 10°≤α≤30°, and α is determined according to the size of the partition wall equipment.

[0018] In one embodiment of the present invention, the return air device further includes a filter screen pressing plate, and the filter screen is fixed to the filter screen pressing plate by a locking knob.

[0019] In one embodiment of the present invention, the filter screen is pulled out by rotating the locking knob to rotate the filter screen pressing plate 90 degrees.

[0020] In one embodiment of the present invention, the guide plate is made of glass fiber reinforced plastic material.

[0021] In one embodiment of the present invention, there are multiple guide plates, and the guide plates include transverse guide plates arranged transversely in the air duct cavity and inclined guide plates arranged obliquely in the air duct cavity.

[0022] In one embodiment of the present invention, the length and spatial angle of the guide plate are determined by computer simulation analysis and model testing.

[0023] In one embodiment of the present invention, the guide plate and the air return device are bonded into an integrated structure by structural adhesive.

[0024] In one embodiment of the present invention, the fixed guide plate has the characteristics of light weight, vibration reduction, noise reduction and prevention of condensation water.

[0025] According to another aspect of the present invention, a power vehicle is provided, comprising the power vehicle air conditioning return air system as described above that can adapt to variable-section air ducts.

[0026] By adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0027] (1) The present invention adjusts the direction and flow of air by arranging a guide plate in the air duct cavity, thereby completely solving the problem of ice formation and even blockage caused by uneven air volume on the surface of the air conditioner evaporator, avoiding the shutdown of the evaporator due to ice formation, and improving the operating reliability of the air conditioner;

[0028] (2) The guide plate of the present invention can be bonded to the return air device by structural adhesive to form an integral structure, which is convenient for manufacturing and installation. The fixed guide plate has the characteristics of light weight, vibration reduction, noise reduction and prevention of condensation water;

[0029] (3) The angled filter installation structure provided in the present invention facilitates quick disassembly and can improve the efficiency of filter cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of a power vehicle air conditioning return air system adaptable to variable-section air ducts provided by the present invention is shown;

[0031] Figure 2 Shown Figure 1 Front view of the center return air device;

[0032] Figure 3 Shown Figure 1 Side view of the center return air unit.

[0033] Reference Signs List

[0034] 1. Return air device, 2. Air duct cavity, 3. Partition wall, 4. Sealing strip, 5. Air conditioning unit, 6. Evaporator cavity, 7. Evaporator, 8. Air guide plate, 9. Mounting frame, 10. Locking knob, 11. Filter, 12. Filter pressure plate, 13. Filter mounting slot, 14. Bolt, 15. Air flow direction, 16. Horizontal air guide plate, 17. Inclined air guide plate, 18. Partition wall equipment, α angle. DETAILED DESCRIPTION

[0035] It should be understood that the embodiments of the present invention shown in the exemplary embodiments are merely illustrative. Although only a few embodiments have been described in detail in the present invention, it is readily apparent to those skilled in the art that various modifications are feasible without departing substantially from the teachings of the subject matter of the present invention. Accordingly, all such modifications should be included within the scope of the present invention. Without departing from the gist of the present invention, other replacements, modifications, variations, and deletions may be made to the design, operating conditions, and parameters of the following exemplary embodiments.

[0036] like Figure 1-3As shown, a power vehicle air conditioning return air system that can adapt to variable-section air ducts includes: a return air device 1, an air duct cavity 2, an air conditioning unit 5, an evaporator cavity 6, an evaporator 7, a sealing strip 4, a partition wall device 18 and multiple guide plates 8. The return air device 1 is installed at an angle on the partition wall 3; the air duct cavity 2 is arranged in the partition wall 3 and is connected to the return air device 1; the air conditioning unit 5 is installed behind the partition wall 3; the evaporator cavity 6 is arranged in the air conditioning unit 5 and is aligned with the air duct cavity 2 and is connected to each other; the evaporator 7 is installed in the evaporator cavity 6; the sealing strip 4 seals the partition wall 3, the air duct cavity 2, the air conditioning unit 5 and the evaporator cavity 6; the guide plate 8 includes two inclined guide plates 17 arranged at an angle in the air duct cavity 2 and a horizontal guide plate 16 arranged horizontally in the air duct cavity 2. The horizontal guide plates 16 and the inclined guide plates 17 are located in the air duct cavity 2 and distribute the flow direction and flow of the air from the return air device 1 according to the air flow direction 15 indicated by the arrow. The partition wall device 18 is installed on the partition wall 3 and is located above the return air device 1.

[0037] Through the above-mentioned structural design of the present invention, a guide plate is arranged in the air duct cavity to adjust the flow direction and flow of air, which completely solves the problem of icing and even blockage caused by uneven air volume on the surface of the air conditioner evaporator, avoids the shutdown of the evaporator due to freezing, and improves the operating reliability of the air conditioner.

[0038] In the above technical structure, if Figure 2 As shown, the return air device 1 is installed on the partition wall 3 through the installation frame 9 and bolts 14.

[0039] In the above structure, if Figure 3 As shown, return air device 1 includes filter 11, which is mounted in filter mounting slot 13. Filter mounting slot 13 is arranged at an angle α with partition wall 3, where 10°≤α≤30°, and α is determined based on the size of the partition wall, preferably α=10°. Thus, the angled filter mounting structure of the present invention facilitates quick removal and improves filter cleaning efficiency.

[0040] In the above structure, if Figure 2-3 As shown, the return air device further includes a filter screen pressing plate 12, and the filter screen 11 is fixed to the filter screen pressing plate 12 by a locking knob 10. The filter screen 11 is pulled out by rotating the locking knob 10 to rotate the filter screen pressing plate 12 90 degrees.

[0041] In the above structure, the length and spatial angle of the guide plate 8 are determined by computer simulation analysis and model testing.

[0042] In the above structure, if Figure 3As shown, the guide plate 8 including the transverse guide plate 16 and the inclined guide plate 17 is bonded to the return air device 1 by structural adhesive into an integrated structure, which is convenient for manufacturing and installation. The fixed guide plate has the characteristics of light weight, vibration reduction, noise reduction and prevention of condensation water.

[0043] For the above system of the present invention, in more detail, Figure 1-3 As shown, the return air device 1 is mounted on the partition wall 3 by bolts 14. The partition wall 3 contains an air duct cavity 2. The air conditioning unit 5 is mounted behind the partition wall 3 and connected and sealed to the partition wall 3 and the air duct cavity 2 by a sealing strip 4. In this way, after the air passes through the filter 11 of the return air device 1 and reaches the air duct cavity 2, the guide plate 8 can redistribute the air flow direction and flow rate as shown by the arrow 15. The air can pass through the evaporator 7 evenly, making the air volume on the surface uniform and not easy to freeze. Therefore, Figure 1-3 As shown, the air is filtered through the filter 11 of the return air device 1 and then enters the air duct cavity 2. In the air duct cavity 2, the air is evenly introduced onto the surface of the evaporator 7 through the transverse guide plate 16 and the inclined guide plate 17, thereby solving the problem in the prior art that after entering the air duct cavity, most of the air reaches the middle and lower parts of the evaporator, causing the top of the evaporator to have less heat exchange and thus become colder and colder, thereby causing ice to form.

[0044] In addition, the guide plate 8 in the present invention needs to be fixed, and its function and manufacturing factors need to be considered. Figure 3 As shown, preferably, the present invention integrates the guide plate 8 (including the transverse guide plate 16 and the inclined guide plate 17) with the return air device 1, adopting an adhesive structure, which is safe and reliable. The length and spatial angle of the guide plate 8 are determined by computer simulation analysis and model testing to achieve the best effect. In addition, since the filter 11 needs to be frequently disassembled for cleaning, the filter installation groove 12 is designed to form a structure with a certain angle α with the partition wall 3, and the filter 11 is fixed by a locking knob 10 and a filter pressure plate 12, which is convenient for installation and disassembly. For example, by rotating the locking knob 10 to rotate the filter pressure plate 12 90°, the filter 11 can be pulled out.

[0045] In summary, the present invention adjusts the direction and flow of air by arranging a guide plate in the air duct cavity, thereby completely solving the problem of uneven air volume on the surface of the air conditioner evaporator that may cause freezing or blockage, avoiding the shutdown of the evaporator after freezing, and improving the operating reliability of the air conditioner; the guide plate in the present invention can be bonded to the return air device into an integrated structure by structural adhesive, which is convenient for manufacturing and installation. The fixed guide plate has the characteristics of light weight, vibration reduction, noise reduction and prevention of condensation water; the angled filter installation structure provided in the present invention facilitates its rapid disassembly, which can improve the efficiency of filter cleaning.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced with equivalents without departing from the spirit and scope of the present invention, it should be included in the scope of protection of the claims of the present invention.

Claims

1. A power vehicle air conditioning return air system adaptable to variable cross-section air ducts, characterized in that: include: A return air device, the return air device being installed on the partition wall; an air duct cavity, the air duct cavity being arranged in the partition wall and being in communication with the air return device; an air conditioning unit, the air conditioning unit being installed behind the partition wall; an evaporator cavity, the evaporator cavity being disposed in the air conditioning unit and aligned with and in communication with the air duct cavity; an evaporator, the evaporator being mounted in the evaporator cavity; a sealing strip, wherein the sealing strip seals and connects the partition wall, the air duct cavity, the air conditioning unit and the evaporator cavity; a guide plate, the guide plate being located in the air duct cavity and distributing the flow direction and flow rate of air from the return air device; the guide plates being multiple in number, including a transverse guide plate disposed transversely in the air duct cavity and an inclined guide plate disposed obliquely in the air duct cavity; the length and spatial angle of the guide plate being determined through computer simulation analysis and model testing; A partition wall device is installed on the partition wall and positioned above the return air device.

2. The power vehicle air conditioning return air system adaptable to variable cross-section air ducts according to claim 1 is characterized in that: The return air device is installed on the partition wall through a mounting frame and bolts.

3. The power vehicle air conditioning return air system adaptable to variable cross-section air ducts according to claim 2 is characterized in that: The return air device includes a filter, which is installed on a filter installation slot. The filter installation slot is set at an angle α to the partition wall, where 10°≤α≤30°, and α is determined according to the size of the partition wall equipment.

4. The power vehicle air conditioning return air system adaptable to variable cross-section air ducts according to claim 3 is characterized in that: The return air device further comprises a filter screen pressing plate, and the filter screen is fixed to the filter screen pressing plate via a locking knob.

5. The power vehicle air conditioning return air system adaptable to variable cross-section air ducts according to claim 4 is characterized in that: The filter screen is pulled out by rotating the locking knob to rotate the filter screen pressing plate 90 degrees.

6. The power vehicle air conditioning return air system adaptable to variable cross-section air ducts according to claim 1 is characterized in that: The guide plate is made of glass fiber reinforced plastic material.

7. The power vehicle air conditioning return air system adaptable to variable cross-section air ducts according to claim 1, characterized in that: The guide plate and the air return device are bonded into an integral structure by structural adhesive.

8. A power vehicle, characterized in that: A power vehicle air conditioning return air system comprising the system as claimed in any one of claims 1 to 7 that can adapt to variable cross-section air ducts.

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