Commercial truck air handling unit assembly

Abstract

The invention belongs to the technical field of truck accessories, and discloses a commercial truck air handling unit assembly which comprises an air inlet box assembly and an evaporation box assembly, the air inlet box assembly is fixedly connected with the bottom face of a floor, the air inlet box assembly comprises a shell, a filter element and an air blower, the side, away from the floor, of the shell is provided with a first opening allowing the filter element to penetrate through, and the first opening is communicated with the air blower. A first baffle is installed at the first opening, a second opening allowing the air blower to penetrate through is formed in the side, away from the front enclosure, of the shell, and a second baffle is installed at the second opening. The air inlet box assembly integrated with the filter element and the air blower is hoisted below the floor, so that the assembling and disassembling convenience of the filter element and the air blower is effectively improved, and the later maintenance cost of the air conditioning box assembly is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of truck accessories, and in particular to an air-conditioning box assembly for a commercial truck. Background Art

[0002] Compared to household vehicles, commercial heavy-duty trucks operate in harsher environments, such as poor road conditions, high dust levels, heavy loads, and long service lives. Consequently, after years of continuous operation, commercial trucks are prone to poor cabin comfort and wear and tear of air conditioning components. Trucks without multi-stage filters are particularly susceptible to dust accumulation and contamination, leading to a dusty cabin environment. Furthermore, the bumpy road conditions make truck hardware more susceptible to damage, shortening maintenance cycles and resulting in higher repair costs.

[0003] Therefore, there is an urgent need for a commercial truck air conditioning box assembly to solve the above problems. Summary of the Invention

[0004] The object of the present invention is to provide an air conditioning box assembly for commercial trucks, which is simple to install and remove a filter element and a blower, thereby effectively reducing the subsequent maintenance costs of the air conditioning box assembly.

[0005] To achieve this object, the present invention adopts the following technical solutions: a commercial truck air-conditioning box assembly, the commercial truck includes an instrument panel bracket and a floor, the floor is provided with a front wall, the instrument panel bracket is located above the floor and is connected to the front wall, the floor is provided with an air passage, the commercial truck air-conditioning box assembly includes an air inlet box assembly and an evaporator box assembly, the air inlet box assembly is fixed to the bottom surface of the floor, the air inlet box assembly includes a shell, a filter element and a blower, the shell is provided with a first air inlet and a first air outlet, the first air outlet is sealed and connected to the floor and communicates with the air passage, the filter element and the blower are both installed in the shell, The filter element is located between the first air inlet and the first air outlet, the blower is located between the filter element and the first air outlet, the side of the shell facing away from the floor is provided with a first opening for the filter element to pass through, and a first baffle is installed at the first opening, the side of the shell facing away from the front panel is provided with a second opening for the blower to pass through, and a second baffle is installed at the second opening; the evaporator box assembly is fixed to the instrument panel bracket and abuts against the floor, the evaporator box assembly is provided with a second air inlet and a second air outlet that are interconnected, the second air inlet is sealed with the floor and is connected to the first air outlet through the air passage.

[0006] Preferably, a plurality of first sheet metals are provided on the top surface of the shell, and the plurality of first sheet metals are all connected to the floor bolts.

[0007] Preferably, the instrument panel bracket is provided with a rear enclosure and two fixed sheet metals, the two fixed sheet metals are symmetrically arranged at the top of the instrument panel bracket, the top of the evaporator box assembly is symmetrically provided with two second sheet metals, the second sheet metals and the fixed sheet metals correspond one to one and are bolted together, and the rear side of the evaporator box assembly is symmetrically provided with two protrusions, both of which are bolted to the rear enclosure.

[0008] Preferably, two positioning holes are provided at intervals on the rear enclosure, and a positioning pin is provided on one side of each protrusion, and the positioning pins correspond to the positioning holes one by one and are plugged in and matched.

[0009] Preferably, a reinforcing rib is provided between the protrusion and the outer wall of the evaporator box assembly, and a plurality of the reinforcing ribs are provided at intervals along the circumference of the protrusion.

[0010] Preferably, a joint is provided on the side of the evaporator assembly facing away from the rear enclosure, and a through hole is provided on the front enclosure, and the joint is passed through the through hole.

[0011] Preferably, two fixing plates are symmetrically provided on both sides of the floor, a flange portion is provided on the top of the front guard, the instrument panel bracket is located between the two fixing plates, and the two sides of the instrument panel bracket are respectively bolted to the two fixing plates, and two third sheet metals are symmetrically provided on the top of the instrument panel bracket, and both of the third sheet metals are bolted to the flange portion.

[0012] Preferably, the floor is also provided with an air inlet channel, and two first air inlets are provided, one of which is isolated from the air passage and connected to the air inlet channel, and the other first air inlet is located below the front enclosure, and both of the first air inlets are provided with rotatable dampers, which are rotated to open or close the corresponding first air inlet.

[0013] Preferably, the shell is connected to a sealing strip, which is arranged around the first air outlet and abuts against the floor.

[0014] Preferably, two guide grooves are symmetrically provided on the inner wall of the shell, and the filter element is slidably engaged with the guide grooves.

[0015] The present invention provides the following beneficial effects: When the commercial truck air conditioning assembly is operating normally, the blower draws air from the first air inlet and then transmits the air to the evaporator assembly through the first and second air inlets. The air is cooled in the evaporator assembly and then enters the cab through the second air outlet for cooling. The commercial truck air conditioning assembly adopts a split design, with the air intake assembly, which integrates the filter element and blower, hoisted below the floor. The driver controls the front of the truck to rotate the air intake assembly, exposing the first and second baffles from the rear of the truck. The driver removes the first baffle to load and unload the filter element from the first opening, and removes the second baffle to load and unload the blower from the second opening. This effectively improves the ease of loading and unloading the filter element and blower, significantly reducing the subsequent maintenance costs of the air conditioning assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1. It is a schematic diagram of the assembly of a commercial truck air conditioning box according to an embodiment of the present invention;

[0017] Figure 2 is an exploded view of an air inlet box assembly according to an embodiment of the present invention;

[0018] Figure 3 1 is a schematic structural diagram of an air inlet box assembly according to an embodiment of the present invention;

[0019] Figure 4 is a schematic structural diagram of a floor according to an embodiment of the present invention;

[0020] Figure 5 1 is a schematic diagram of the assembly of the air inlet box assembly according to an embodiment of the present invention;

[0021] Figure 6 1 is a schematic structural diagram of an evaporator box assembly according to an embodiment of the present invention;

[0022] Figure 7 is a schematic structural diagram of an instrument panel bracket according to an embodiment of the present invention;

[0023] Figure 8 is an assembly diagram of an evaporator box assembly according to an embodiment of the present invention;

[0024] Figure 9 is a structural schematic diagram of the evaporator box assembly from another angle according to an embodiment of the present invention;

[0025] Figure 10 This is a schematic diagram of the connection between the instrument panel bracket and the floor according to an embodiment of the present invention;

[0026] Figure 11 4 is a cross-sectional view of a commercial truck air conditioning box assembly according to an embodiment of the present invention.

[0027] In the picture:

[0028] 1. Instrument panel bracket; 11. Rear panel; 111. Positioning hole; 12. Fixed sheet metal; 13. Third sheet metal;

[0029] 2. Floor; 21. Front panel; 211. Flanged portion; 212. Through hole; 22. Air passage; 23. Fixing plate; 24. Air inlet passage; 25. Fixing hole;

[0030] 3. Air inlet box assembly; 31. Housing; 311. First air inlet; 312. First air outlet; 313. First opening; 314. Second opening; 315. First sheet metal; 316. Damper; 32. Filter element; 33. Blower; 34. First baffle; 35. Second baffle; 36. Drive assembly; 37. Sealing strip;

[0031] 4. Evaporator assembly; 41. Second air inlet; 42. Second air outlet; 43. Evaporator; 44. Warm core; 441. PTC heater; 45. Second sheet metal; 46. Protrusion; 461. Positioning pin; 47. Connector. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0033] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0036] Reference Figures 1 to 11 As shown, according to an embodiment of the present application, a commercial truck air conditioning unit assembly is provided. The commercial truck includes an instrument panel bracket 1 and a floor panel 2. The front sidewall of the floor panel 2 is provided with a vertical front panel 21 made of fireproof material. The instrument panel bracket 1 is located above the floor panel 2 and connected to the front panel 21. The floor panel 2 is provided with an air passage 22 that runs through the floor panel 2 along its wall thickness.

[0037] The commercial truck air conditioning box assembly includes: an air intake box assembly 3 and an evaporator box assembly 4. The air intake box assembly 3 is fixed to the bottom surface of the floor 2, that is, the air intake box assembly 3 is hoisted under the floor 2. The air intake box assembly 3 includes a shell 31, a filter element 32 and a blower 33. The shell 31 is provided with a first air inlet 311 and a first air outlet 312. The first air outlet 312 is sealed with the floor 2 and communicates with the air passage 22. The filter element 32 and the blower 33 are both installed in the shell 31. The filter element 32 is located between the first air inlet 311 and the first air outlet 312, and the blower 33 is located between the filter element 32 and the first air outlet 312. Specifically, the housing 31 defines a first cavity and a second cavity along the direction of airflow. The first cavity forms a first air inlet 311 in the front half of the housing 31, and the second cavity forms a first air outlet 312 at the top of the rear half of the housing. The filter element 32 is installed between the first and second cavities, and the blower 33 is installed in the second cavity, with the air inlet of the blower 33 facing the filter element 32 and the air outlet facing the first air outlet 312. A first opening 313 for the filter element 32 to pass through is provided on the side of the housing 31 facing away from the floor 2. A removable first baffle 34 is installed at the first opening 313. A second opening 314 for the blower 33 to pass through is provided on the side of the housing 31 facing away from the front fender 21. A removable second baffle 35 is installed at the second opening 314.

[0038] The evaporator assembly 4 is fixed to the instrument panel bracket 1 and abuts the floor panel 2. It has a second air inlet 41 and a second air outlet 42 that communicate with each other. The second air inlet 41 is sealed to the floor panel 2 and communicates with the first air outlet 312 via the air passage 22. The evaporator assembly 4 houses an evaporator 43 and a heater core 44. A PTC heater 441 is connected to the evaporator assembly 4 for heating the heater core 44. The evaporator 43 and heater core 44 are used for cooling and heating the air flow, respectively.

[0039] It is understandable that when the commercial truck air conditioning box assembly is operating normally, the blower 33 draws air in from the first air inlet 311 and blows the air out of the first air outlet 312. The air passes through the first air outlet 312 and the second air inlet 41 and then enters the evaporator box assembly 4. After being cooled or heated in the evaporator box assembly 4, the air enters the cab through the second air outlet 42 for cooling or heating.

[0040] The commercial truck air conditioning box assembly adopts a split design, with the air intake box assembly 3 integrated with the filter element 32 and the blower 33 hoisted under the floor 2. The driver controls the front of the truck to flip, which can drive the air intake box assembly 3 to rotate, thereby exposing the first baffle 34 and the second baffle 35 from the rear side of the front. The driver removes the first baffle 34 to load and unload the filter element 32 from the first opening 313. The driver removes the second baffle 35 to load and unload the blower 33 from the second opening 314, effectively improving the installation and removal convenience of the filter element 32 and the blower 33, and significantly reducing the subsequent maintenance cost of the air conditioning box assembly.

[0041] Furthermore, two guide grooves are symmetrically provided on the inner wall of the housing 31 . The width of the guide grooves is the same as the thickness of the filter element 32 , and the filter element 32 is slidably fitted in the guide grooves.

[0042] By setting the guide groove, on the one hand, the guide groove can guide the filter element 32 to move in and out of the shell 31, further improving the convenience of loading and unloading the filter element 32; on the other hand, after the first mounting plate is fixed, the inner wall of the shell, the inner wall of the guide groove and the first mounting plate cooperate to effectively limit and fix the filter element 32, avoid shaking and displacement of the filter element 32, and effectively improve the installation stability of the filter element 32.

[0043] Reference Figures 3 to 5 As shown, it can be understood that the top surface of the shell 31 is provided with multiple first sheet metals 315, and the multiple first sheet metals 315 are arranged in a matrix shape. The first sheet metal 315 is a horizontally arranged sheet structure. The first sheet metal 315 and the shell 31 are welded and fixed, and a reinforcing rib structure is provided between the first sheet metal 315 and the shell 31. A column with a screw hole for bolt fixing is provided on the first sheet metal 315. The height of the column is greater than the thickness of the first sheet metal 315 to improve the installation stability of the screws. A plurality of fixing through holes 25 corresponding to the positions of the first sheet metal 315 are provided on the floor 2. The multiple first sheet metals 315 are bolted to the floor 2 through the corresponding fixing through holes 25 and screws.

[0044] By setting the first sheet metal 315 to fix the air inlet box assembly 3, the connection structure between the air inlet box assembly 3 and the floor 2 is simplified, the installation or disassembly of the shell 31 is facilitated, the design and production cost of the shell 31 is reduced, and the installation stability of the air inlet box assembly 3 is ensured.

[0045] Furthermore, a sealing strip 37 is connected to the top surface of the housing 31. The sealing strip 37 surrounds the first air outlet 312 and abuts against the floor 2. The horizontal projection of the air passage 22 lies within the horizontal projection of the sealing strip 37. Furthermore, after the evaporator assembly 4 is secured, the second air intake of the evaporator assembly 4 can pass through the air passage 22 and abut against the sealing strip 37, achieving sealed communication between the first air outlet 312 and the second air inlet 41.

[0046] By providing a sealing strip 37 to achieve a sealed connection between the first air outlet 312 and the floor 2 , the sealing structure between the first air outlet 312 and the floor 2 can be simplified, further reducing the use cost of the air inlet box assembly 3 .

[0047] Reference Figures 6 to 8 As shown, it can be understood that the instrument panel bracket 1 is provided with a rear panel 11 and two fixed sheet metals 12. The rear panel 11 and the front panel 21 are arranged opposite each other. The two fixed sheet metals 12 are symmetrically arranged at the top of the instrument panel bracket 1, and the fixed sheet metals 12 extend horizontally toward the center of the instrument panel bracket 1. Two second sheet metals 45 are symmetrically provided at the top of the evaporator assembly 4. The structure of the second sheet metals 45 can be referred to the description of the first sheet metal 315 above and will not be repeated here. The second sheet metals 45 and the fixed sheet metals 12 correspond one-to-one and are bolted together. The rear side of the evaporator assembly 4 is symmetrically provided with two protrusions 46. The protrusions 46 are C-shaped column structures protruding from the rear side wall of the evaporator assembly 4. Both protrusions 46 are bolted to the rear panel 11.

[0048] By setting two second sheet metals 45 and two protrusions 46, the two second sheet metals 45 are connected to the two fixed sheet metals 12 of the instrument panel bracket 1, so that the evaporator box assembly 4 can be fixed in a limited position along the vertical direction, and the two protrusions 46 are connected to the rear enclosure 11, so that the evaporator box assembly 4 can be fixed in a limited position along the circumferential direction of the evaporator box assembly 4, thereby effectively improving the installation stability of the evaporator box assembly 4.

[0049] Reference Figure 8 and Figure 9 As shown, it can be understood that the rear enclosure 11 is provided with two positioning holes 111 at intervals, and a positioning pin 461 is provided on one side of each protrusion 46. The positioning pin 461 corresponds to the positioning hole 111 one by one and is plugged in and matched.

[0050] By setting the positioning holes 111 and the positioning pins 461, before fixing the evaporator box assembly 4, the user can first pass the two positioning pins 461 through the two positioning holes 111 to perform preliminary positioning of the evaporator box assembly 4, so that the second sheet metal 45 and the protrusion 46 are automatically aligned, further improving the convenience of loading and unloading the evaporator box assembly 4.

[0051] Furthermore, a reinforcing rib is provided between the protrusion 46 and the outer wall of the evaporator box assembly 4 . The reinforcing rib extends from the outer wall of the evaporator box assembly 4 to the outer wall of the protrusion 46 , and a plurality of reinforcing ribs are provided at intervals along the circumference of the protrusion 46 .

[0052] By providing a plurality of reinforcing ribs, the structural strength of the protruding portion 46 can be effectively improved, and the connection stability between the protruding portion 46 and the rear enclosure 11 can be ensured.

[0053] Reference Figure 4 and Figure 6 As shown, it can be understood that the evaporator assembly 4 is provided with a joint 47 on the side facing away from the rear panel 11. The outer wall of the joint 47 is surrounded by a sealing sponge. The joint 47 is used to connect the external thermal system (such as a heat pump or compressor) with the internal evaporator 43 and heater core 44, thereby forming a circulating refrigerant circuit. The front panel 21 is provided with a through hole 212, and the joint 47 is inserted into the through hole 212.

[0054] By setting the through hole 212 to avoid the joint 47, the front area of ​​the front panel 21 can be reasonably utilized to arrange the thermal system, while avoiding interference between the joint 47 and the front panel 21, effectively improving the space utilization and structural rationality of the air-conditioning box assembly.

[0055] Reference Figure 10 As shown, it can be understood that two vertical fixing plates 23 are symmetrically provided on both sides of the floor 2, a flange portion 211 is provided on the top of the front guard 21, the instrument panel bracket 1 is located between the two fixing plates 23, and the two sides of the instrument panel bracket 1 are respectively bolted to the two fixing plates 23, and two third sheet metals 13 are symmetrically provided on the top of the instrument panel bracket 1, and the two third sheet metals 13 are both bolted to the flange portion 211.

[0056] By providing the flange portion 211 and the fixing plate 23 to fix the instrument panel bracket 1 , the connection structure between the instrument panel bracket and the floor 2 can be simplified, while improving the installation stability of the instrument panel bracket 1 .

[0057] Reference Figure 1 and Figure 11As shown (the instrument panel bracket 1 is omitted), it is understood that the floor panel 2 also has an air inlet duct 24, with two first air inlets 311 provided. Both first air inlets 311 are connected to the first cavity. One of the first air inlets 311 is isolated from the air passage 22 and connected to the air inlet duct 24. The other first air inlet 311 is located below the front fender 21. Both first air inlets 311 are equipped with rotatable dampers 316. Specifically, dampers 316 are provided at the top and bottom of the first cavity in the housing. Rotating the dampers 316 opens or closes the corresponding first air inlet 311. In this embodiment, both dampers 316 are connected to a drive assembly 36, which includes a motor and two connecting rods. The motor shaft is directly connected to the top damper 316, and the two connecting rods are drivingly connected between the motor shaft and the bottom damper 316. This arrangement enables the two dampers 316 to be linked, and the air conditioning unit assembly can be controlled to enter different air outlet modes based on the open and closed states of the dampers 316. The mode control of the air conditioning box assembly is as follows:

[0058] Fresh air outlet mode: the driving assembly 36 drives the bottom damper 316 to open and the top damper 316 to close, so that the first air inlet 311 below the front fender 21 can draw fresh air into the blower 33 and realize the fresh air outlet 42;

[0059] Circulating air outlet mode: the driving assembly 36 drives the bottom damper 316 to close and the top damper 316 to open, so that the first air inlet 311 connected to the air inlet channel 24 can draw air in the cab into the blower 33, and realize the circulating air outlet of the second air outlet 42;

[0060] Mixed air outlet mode: The driving component 36 drives the two dampers 316 to rotate to a preset angle, so that the two first air inlets 311 are connected to each other. At this time, the first air inlet 311 below the enclosure draws in fresh air, and the first air inlet 311 connected to the air inlet channel 24 draws in the air in the cab. The fresh air and the air in the cab are mixed and enter the blower 33, realizing mixed air outlet from the two air outlets.

[0061] By providing two first air inlets 311 , the operating modes of the air conditioning box assembly can be expanded, the practicality of the air conditioning box assembly can be improved, and the driving experience can be effectively improved.

[0062] Optionally, in this embodiment, the second air outlet 42 includes a face-blowing air outlet arranged vertically upward, a foot-blowing air outlet symmetrically arranged on both sides of the evaporator box, and a defrost air outlet arranged forward. The face-blowing air outlet, the foot-blowing air outlet, and the defrost air outlet are all provided with a rotatable damper structure. In addition, a rotatable damper structure is also provided between the evaporator 43 and the warm core 44. Each damper structure is connected to a motor drive component, so that the user can control the air outlet direction, that is, whether the air flow is cooling or heating, thereby effectively improving the controllability of the air-conditioning box assembly.

[0063] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A commercial truck air conditioning box assembly, comprising an instrument panel bracket (1) and a floor (2), wherein the floor (2) is provided with a front panel (21), the instrument panel bracket (1) is located above the floor (2) and connected to the front panel (21), and the floor (2) is provided with an air passage (22), characterized in that: The commercial truck air conditioning box assembly includes: An air inlet box assembly (3) is fixedly connected to the bottom surface of the floor (2), and the air inlet box assembly (3) includes a shell (31), a filter element (32) and a blower (33). The shell (31) is provided with a first air inlet (311) and a first air outlet (312). The first air outlet (312) is sealed and connected to the floor (2) and communicates with the air passage (22). The filter element (32) and the blower (33) are both installed in the shell (31). The filter element (32) is located between the first air inlet (311) and the first air outlet (312). an air outlet (312), the blower (33) is located between the filter element (32) and the first air outlet (312), a first opening (313) for the filter element (32) to pass through is provided on the side of the housing (31) facing away from the floor (2), a first baffle (34) is installed at the first opening (313), a second opening (314) for the blower (33) to pass through is provided on the side of the housing (31) facing away from the front enclosure (21), a second baffle (35) is installed at the second opening (314); An evaporator box assembly (4) is fixedly connected to the instrument panel bracket (1) and abuts against the floor (2); the evaporator box assembly (4) is provided with a second air inlet (41) and a second air outlet (42) that are communicated with each other; the second air inlet (41) is sealedly connected to the floor (2) and communicates with the first air outlet (312) through the air passage (22).

2. The commercial truck air conditioning box assembly according to claim 1, characterized in that: The top surface of the shell (31) is provided with a plurality of first sheet metals (315), and the plurality of first sheet metals (315) are all connected to the floor (2) by bolts.

3. The commercial truck air conditioning box assembly according to claim 1, characterized in that: The instrument panel bracket (1) is provided with a rear enclosure (11) and two fixed sheet metals (12), the two fixed sheet metals (12) are symmetrically arranged at the top of the instrument panel bracket (1), the top of the evaporator box assembly (4) is symmetrically provided with two second sheet metals (45), the second sheet metals (45) and the fixed sheet metals (12) are in one-to-one correspondence and are bolted together, and the rear side of the evaporator box assembly (4) is symmetrically provided with two protrusions (46), both of which are bolted together with the rear enclosure (11).

4. The commercial truck air conditioning box assembly according to claim 3, characterized in that: The rear enclosure (11) is provided with two positioning holes (111) at intervals, and a positioning pin (461) is provided on one side of each protrusion (46), and the positioning pin (461) corresponds to the positioning hole (111) one by one and is plugged in and matched.

5. The commercial truck air conditioning box assembly according to claim 3, characterized in that: A reinforcing rib is provided between the protruding portion (46) and the outer wall of the evaporator box assembly (4), and a plurality of the reinforcing ribs are provided at intervals along the circumference of the protruding portion (46).

6. The commercial truck air conditioning box assembly according to claim 3, characterized in that: The evaporator box assembly (4) is provided with a joint (47) on a side facing away from the rear enclosure (11), the front enclosure (21) is provided with a through hole (212), and the joint (47) is passed through the through hole (212).

7. The commercial truck air conditioning box assembly according to claim 1, characterized in that: Two fixing plates (23) are symmetrically provided on both sides of the floor (2), a flange portion (211) is provided on the top of the front panel (21), the instrument panel bracket (1) is located between the two fixing plates (23), and both sides of the instrument panel bracket (1) are bolted to the two fixing plates (23), and two third sheet metals (13) are symmetrically provided on the top of the instrument panel bracket (1), and both the third sheet metals (13) are bolted to the flange portion (211).

8. The commercial truck air conditioning box assembly according to claim 1, characterized in that: The floor (2) is further provided with an air inlet channel (24), and two first air inlets (311) are provided, one of the first air inlets (311) is isolated from the air passage (22) and communicates with the air inlet channel (24), and the other first air inlet (311) is located below the front enclosure (21), and a rotatable damper (316) is provided in each of the two first air inlets (311), and the damper (316) is rotated to open or close the corresponding first air inlet (311).

9. The commercial truck air conditioning box assembly according to claim 1, characterized in that: The housing (31) is connected to a sealing strip (37), which is arranged around the first air outlet (312) and abuts against the floor (2).

10. The commercial truck air conditioning box assembly according to claim 1, characterized in that: Two guide grooves are symmetrically provided on the inner wall of the housing (31), and the filter element (32) is slidably engaged with the guide grooves.

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