Air conditioning system for a vehicle

Abstract

This invention belongs to the field of vehicle air conditioning technology, specifically relating to a vehicle air conditioning system, including an air conditioning housing, a bracket assembly, a sealing structure, and an air conditioning unit; the air conditioning housing is mounted on the cab roof via the bracket assembly, forming a sand-discharging space between it and the cab roof; the upper surface of the bottom plate of the air conditioning housing is divided into a first installation area and a second installation area, and the inner cavity of the air conditioning housing is divided into a first installation chamber above the first installation area and a second installation chamber above the second installation area by the sealing structure; the blower and evaporator of the air conditioning unit are installed in the second installation chamber; a first air inlet and a first air outlet communicating with the first installation chamber are provided on the outer wall of the air conditioning housing, the condenser of the air conditioning unit is installed in the first installation chamber, and the condenser fan of the air conditioning unit is installed on the first air inlet or the first air outlet; a second air inlet and a second air outlet are provided on the second installation area; multiple sand-discharging holes are provided on the first installation area.

Description

Technical Field

[0001] This invention belongs to the field of vehicle air conditioning technology, and specifically relates to a vehicle air conditioning system. Background Technology

[0002] Because existing vehicle air conditioning systems typically lack specific designs for the high temperatures, sandy conditions, and abundant sunlight characteristic of desert regions, fine sand and dust easily adhere to the condenser and evaporator when operating in desert environments. This forms an insulating layer, hindering heat exchange in the condenser and reducing the evaporator's heat absorption efficiency. The fine sand and dust also easily clog the air intake filter, reducing airflow and weakening the evaporator's heat absorption capacity. Consequently, this leads to technical problems such as insufficient air conditioning performance and poor cooling effect. Summary of the Invention

[0003] To address the shortcomings of the prior art, the present invention provides a vehicle air conditioning system that solves the technical problems of insufficient air conditioning performance and poor cooling effect when existing vehicle air conditioning systems operate in desert environments.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: An air conditioning system for a vehicle includes: an air conditioning housing, a bracket assembly, a sealing structure, and an air conditioning unit; The bracket assembly is used to fix the air conditioning unit to the roof of the vehicle's cab and raise the air conditioning unit, forming a sand-discharging space between the bottom plate of the air conditioning unit and the roof of the cab. The upper surface of the bottom plate of the air conditioner housing is divided into a first installation area and a second installation area. The sealing structure is fixedly installed in the inner cavity of the air conditioner housing. The sealing structure is used to divide the inner cavity into a first installation chamber above the first installation area and a second installation chamber above the second installation area. The air conditioning unit includes an air conditioning refrigeration circuit, a blower, and a condenser fan; The blower and the evaporator of the air conditioning refrigeration circuit are fixedly installed in the second mounting chamber; The outer wall of the air conditioning unit is provided with a first air inlet and a first air outlet; the first air inlet and the first air outlet are both connected to the first mounting chamber; the condenser of the air conditioning refrigeration circuit is fixedly installed in the first mounting chamber; the condenser fan is fixedly installed on the first air inlet or the first air outlet; the condenser fan is used to drive the air outside the air conditioning unit to pass through the first air inlet, the condenser and the first air outlet in sequence and then return to the outside of the air conditioning unit. The second installation area is provided with a second air inlet and a second air outlet, both of which are used to connect to the driver's cabin of the vehicle; the blower is used to drive the air in the driver's cabin to return to the driver's cabin after passing through the second air inlet, the evaporator and the second air outlet in sequence. The first installation area is provided with a plurality of sand discharge holes, which are used to discharge sand and dust in the first installation chamber into the sand discharge space.

[0005] By using the condenser fan to drive air outside the air conditioning unit through the first air inlet, the condenser, and the first air outlet before returning to the outside of the air conditioning unit, a heat dissipation external circulation air path is formed between the outside of the vehicle and the first installation chamber. By using the blower to drive air inside the driver's cabin through the second air inlet, the evaporator, and the second air outlet before returning to the driver's cabin, a cooling internal circulation air path is formed between the driver's cabin and the second installation chamber. The sealing structure completely isolates the heat dissipation external circulation air path and the cooling internal circulation air path, so that the air conditioning system of the vehicle provided by this invention essentially only has an internal circulation mode. When operating in a desert environment, the dusty outside air cannot directly enter the second installation chamber and the driver's cabin, which can greatly reduce the adhesion of fine sand and dust on the evaporator, ensuring the heat absorption efficiency of the evaporator. After installing an air conditioning intake filter on the second air inlet, the air conditioning intake filter is not easy to become clogged, which can ensure the airflow through the evaporator and ensure the evaporator's efficiency. The heat absorption capacity is stable. Simultaneously, by opening multiple sand-discharging holes in the first installation area, a sand-discharging channel is formed within the first installation chamber. Gravity, vehicle vibration, natural wind, and the airflow driven by the condenser fan can then be used to discharge sand and dust (including sand and dust adsorbed on the condenser, sand and dust floating in the first installation chamber, and sand and dust accumulated in the first installation chamber) into the sand-discharging space through the sand-discharging holes. Furthermore, the natural wind generated during vehicle movement blows away the sand and dust within the sand-discharging space and from the roof of the cab, effectively reducing the accumulation of sand and dust in the first installation chamber and reducing the adhesion of fine sand and dust to the condenser. Therefore, the vehicle air conditioning system provided by this invention, when operating in a desert environment, can reduce the amount of fine sand and dust adhering to the condenser and evaporator, preventing fine sand and dust from clogging the air conditioning intake filter. It has the advantages of effectively improving the heat exchange capacity of the condenser and the heat absorption performance of the evaporator, resulting in good air conditioning performance and excellent cooling effect.

[0006] The specific structure of the air conditioning refrigeration circuit is common knowledge in the field, and it usually includes a refrigerant pipe, as well as a compressor, condenser, expansion valve and evaporator installed on the refrigerant pipe; in some cases, it also includes a dryer tank installed on the refrigerant pipe.

[0007] In this invention, the air conditioning refrigeration circuit includes refrigerant pipelines connected end to end, and a compressor, condenser, expansion valve and evaporator installed sequentially on the refrigerant pipelines.

[0008] Furthermore, the air conditioning refrigeration circuit also includes a dryer installed on the refrigerant pipeline; the dryer is installed on the refrigerant pipeline between the condenser and the expansion valve.

[0009] Furthermore, the number of the air conditioning units is multiple; The number of the first air inlets is the same as the number of the air conditioning units and they are set in a one-to-one correspondence. The number of the first air outlets is the same as the number of the air conditioning units and they are set in a one-to-one correspondence. The number of the second air outlets is the same as the number of the air conditioning units and they are set in a one-to-one correspondence. The number of the second air inlets is one. The condenser fan is used to drive the air outside the air conditioning unit to pass through the corresponding first air inlet, the condenser of the same air conditioning unit, and the corresponding second air outlet in sequence before returning to the outside of the air conditioning unit. The blower is used to drive the air in the cockpit to pass sequentially through the second air inlet, the evaporator of the same air conditioning unit, and the corresponding second air outlet before returning to the cockpit.

[0010] Furthermore, the first mounting area surrounds the outer periphery of the second mounting area; The sealing structure is a sealing cover, the lower end of which is set as an opening, and the outer edge of the opening is used to seal and fix it to the upper surface of the base plate.

[0011] Furthermore, the number of air conditioning units is two; the two air conditioning units are arranged symmetrically on the left and right sides in the air conditioning unit. The second installation area is divided into the left air outlet sub-area, the left evaporator installation sub-area, the air inlet sub-area, the right evaporator installation sub-area, and the right air outlet sub-area in sequence along the left and right directions. The blower of the air conditioning unit on the left is installed in the left air outlet sub-area, and the evaporator is installed in the left evaporator mounting sub-area; the blower of the air conditioning unit on the right is installed in the right air outlet sub-area, and the evaporator is installed in the right evaporator mounting sub-area. The condenser of the air conditioning unit on the left is located on the left side of the sealing cover, and the condenser of the air conditioning unit on the right is located on the right side of the sealing cover; The second air inlet is located within the air inlet sub-area, the second air outlet corresponding to the air conditioning unit on the left is located within the left air outlet sub-area, and the second air outlet corresponding to the air conditioning unit on the right is located within the right air outlet sub-area.

[0012] By aligning the left-right direction of the air conditioning unit with that of the vehicle during installation, the two symmetrically arranged air conditioning units within the unit expand the functionality of the vehicle's air conditioning system, enabling more precise cooling control. This allows the system to control the operation of the two units based on the direction of sunlight and the real-time interior temperature (e.g., when sunlight is coming from the left side of the vehicle and the interior temperature does not exceed a preset threshold, the left-side unit can be controlled to operate, causing air to exit through the second air vent on the left). This improves the targeted cooling and environmental adaptability of the passenger compartment, making the system more intelligent. Furthermore, the configuration of two independently operating air conditioning units provides redundancy and backup, enhancing the reliability of the system.

[0013] Furthermore, the vehicle's air conditioning system also includes a cooling air intake structure and two cooling air outlet structures; the cooling air intake structure includes an air intake pipe and a third air intake opening on the cab roof panel; The air inlet pipe is a vertically arranged tube, used to connect the second air inlet and the third air inlet. The bottom end of the air inlet pipe is fixedly connected to or integrally formed with the upper surface of the cab roof, and the top end of the air inlet pipe is sealed to the outer edge of the lower end of the second air inlet. The two cooling air outlet structures are configured to correspond one-to-one with the two second air outlets; The cooling air outlet structure includes an air outlet pipe and a third air outlet on the cab roof panel; the air outlet pipe is a vertically arranged tube, which is used to connect the third air outlet and the corresponding second air outlet. The bottom end of the air outlet pipe is fixedly connected to the upper surface of the cab roof panel or integrally formed, and the top end of the air outlet pipe is sealed to the outer edge of the lower end of the corresponding second air outlet.

[0014] Furthermore, the cooling air inlet structure also includes a first sealing gasket, and the cooling air outlet structure also includes a second sealing gasket; The first sealing gasket is installed between the top end of the air inlet pipe and the outer edge of the lower end of the second air inlet. The upper surface of the first sealing gasket is used to press and fit tightly against the outer edge of the lower end of the second air inlet, and the lower surface of the first sealing gasket is used to press and fit tightly against the top end of the air inlet pipe. The second sealing gasket is installed between the top end of the air outlet pipe and the outer edge of the lower end of the corresponding second air outlet. The upper surface of the second sealing gasket is used to press and fit tightly against the outer edge of the lower end of the corresponding second air inlet, and the lower surface of the second sealing gasket is used to press and fit tightly against the top end of the air outlet pipe (the air outlet pipe of the same cooling air outlet structure).

[0015] By installing the first sealing gasket between the top of the air inlet pipe and the outer edge of the lower end of the second air inlet, and installing the second sealing gasket between the top of the air outlet pipe and the outer edge of the lower end of the corresponding second air outlet, the sealing between the air inlet pipe and the second air inlet, and between the air outlet pipe and the corresponding second air outlet, can be ensured without rigidly connecting the air inlet pipe to the air conditioning unit and the air outlet pipe to the air conditioning unit. This effectively prevents the sealing from failing due to vehicle vibration or other factors, causing sand and dust to enter the cab and the second mounting chamber through the cracks.

[0016] Furthermore, the top end of the air inlet pipe is turned outward or inward to form a first annular connecting part, and the top end of the air outlet pipe is turned outward or inward to form a second annular connecting part. The upper surface of the first annular connecting portion is used to press and adhere tightly to the lower surface of the first sealing gasket; The upper surface of the second annular connecting part of the air outlet pipe is used to press and adhere tightly to the lower surface of the second sealing gasket of the same cooling air outlet structure.

[0017] By setting the first annular connecting part and the second annular connecting part, the pressing and fitting area between the air inlet pipe and the first sealing gasket, as well as the pressing and fitting area between the air outlet pipe and the second sealing gasket, can be effectively increased; the sealing reliability between the air inlet pipe and the second air inlet, as well as the sealing reliability between the air outlet pipe and the corresponding second air outlet, can be effectively improved.

[0018] Furthermore, the vehicle's air conditioning system also includes a junction box; The second air inlet and / or the second air outlet are also used for the wiring harness in the cockpit to pass into the second mounting chamber; The sealing cover has a mounting hole on its front or rear side, which connects the first mounting chamber and the second mounting chamber. The terminal block is fixedly installed in the mounting hole. The terminal block is used to connect the wire harness in the first mounting chamber and the wire harness in the second mounting chamber. The terminal block is also used to seal the mounting hole.

[0019] By setting the terminal block, a connection channel can be provided between the wire harness in the first mounting chamber and the wire harness in the second mounting chamber while maintaining the sealed isolation between the first mounting chamber and the second mounting chamber. This avoids the situation where the sealing performance of the sealing cover is reduced due to the need to open wire holes on the sealing cover.

[0020] Furthermore, the vehicle's air conditioning system also includes a controller, a battery pack, and a photovoltaic panel assembly. The battery pack is fixedly installed in the second mounting chamber; the photovoltaic panel assembly is disposed on the upper side of the air conditioning unit and fixedly installed on the air conditioning unit. The air conditioning unit, the photovoltaic panel assembly, and the battery pack are all electrically connected to the controller, which is also electrically connected to the vehicle's power battery. The controller is used to control the photovoltaic panel assembly to charge the battery pack and the power battery. The controller is also used to switch the power supply of the air conditioning unit between the battery pack and the power battery.

[0021] By setting up the battery pack and the photovoltaic panel assembly, not only can additional power be provided to each of the air conditioning units, but the air conditioning system of the vehicle provided by the present invention can also make full use of the abundant sunlight in the desert area to generate electricity in real time, and replenish the battery pack and the vehicle's power battery. When operating in the desert environment, it can not only offset the impact of air conditioning energy consumption on the vehicle's range, but also improve the vehicle's range and further enhance its adaptability to the desert environment.

[0022] By fixing the battery pack in the second mounting chamber, the battery pack can also be cooled by internal air circulation.

[0023] Furthermore, the battery pack is fixedly connected to the inner wall of the mounting cover and positioned above the second air inlet.

[0024] By fixing the battery pack above the second air inlet, the blower can drive the air in the cockpit to pass through the second air inlet, the battery, the evaporator, and the corresponding second air outlet before returning to the cockpit; this ensures that the battery pack is always in the internal circulation air path, guaranteeing the cooling effect of the internal circulation air path on the battery pack.

[0025] Furthermore, the first air outlet corresponding to the air conditioning unit on the left is located on the left wall of the air conditioning unit, and the first air outlet corresponding to the air conditioning unit on the right is located on the right wall of the air conditioning unit; the condenser fan is fixedly installed in the corresponding first air outlet. The first air inlet includes two air inlets; the two air inlets corresponding to the condenser are respectively opened on the front wall and the rear wall of the air conditioning unit; the two air inlets corresponding to the condenser are respectively located on the front side and the rear side of the condenser.

[0026] Furthermore, louvers are installed in the air inlet.

[0027] By installing the louvers in the air inlet, the amount of sand and dust drawn into the first installation chamber can be effectively reduced.

[0028] Furthermore, the air conditioning unit also includes a drainage pipe; The drain pipe is installed in the first installation chamber. One end of the drain pipe of the air conditioning unit on the left is connected to the sealing cover and then communicates with the water receiving tray of the evaporator on the left. The other end extends out from the lower side of the left wall of the air conditioning unit to the outside of the air conditioning unit. One end of the drain pipe of the air conditioning unit on the right is connected to the sealing cover and then communicates with the water receiving tray of the evaporator on the right. The other end extends out from the lower side of the right wall of the air conditioning unit to the outside of the air conditioning unit.

[0029] Furthermore, the vehicle's air conditioning system also includes a left water inlet pipe and a right water inlet pipe fixedly installed outside the vehicle body, both of which extend along the front-rear direction of the vehicle. The left water inlet pipe is located on the left side of the vehicle body, and the right water inlet pipe is located on the right side of the vehicle body. The left water inlet pipe is connected to one end of the drain pipe of the air conditioning unit on the left side, which extends out to the outside of the air conditioning box. The right water inlet pipe is connected to one end of the drain pipe of the air conditioning unit on the right side, which extends out to the outside of the air conditioning box. The rear ends of both the left and right water inlets extend to the lower side of the rear of the vehicle body, and the rear ends of both the left and right water inlets are used for drainage.

[0030] By setting the water pipe to drain the condensate from the air conditioner to the lower rear of the vehicle body, it is possible to prevent the condensate from mixing with sand and dust in the air and forming mud and dirt that adheres to the vehicle body. Furthermore, by setting the drain outlet (i.e., the opening at the rear end of the water pipe) to the lower rear of the vehicle body and increasing the distance and height difference between the drain outlet and the air conditioning unit, it is possible to prevent sand and dust in the air from entering the air conditioning unit through the drain pipe.

[0031] Furthermore, the compressor of the air conditioning refrigeration circuit is fixedly installed in the first mounting chamber.

[0032] Furthermore, the drying tank of the air conditioning refrigeration circuit is fixedly installed in the first mounting chamber.

[0033] By integrating the expansion valve, the compressor, and the dryer into the air conditioning unit and placing them in the first mounting chamber, a compact and integrated design of the vehicle's air conditioning system can be achieved. Attached Figure Description

[0034] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a top view of the vehicle's air conditioning system in the embodiment; Figure 2 This is a bottom view of the internal structure of the vehicle's air conditioning system in the embodiment; Figure 3 This is a simplified bottom view of the installation structure of the sealing cover and the two air conditioning refrigeration circuits inside the air conditioning unit in the embodiment. Figure 4 This is a bottom view of the vehicle's air conditioning system in the embodiment; Figure 5 yes Figure 1 AA cross-section view; Figure 6 This is a rear view of the vehicle's air conditioning system in the embodiment; Figure 7 This is a front view of the vehicle's air conditioning system in the embodiment; Figure 8 This is a left structural view of the vehicle's air conditioning system in the embodiment; Figure 9 This is a front view of the terminal block structure in the embodiment; Figure 10 This is a left view of the assembly structure of the air conditioning unit and the drain pipe in the embodiment; Figure 11 This is a front view of the assembly structure of the air conditioning unit and the drain pipe in the embodiment; Among them, 1-air conditioning unit, 2-cab roof, 3-blower, 4-condenser fan, 5-evaporator, 6-condenser, 7-refrigerant piping, 8-compressor, 9-expansion valve, 10-drier, 11-mounting bracket, 12-sealing cover, 13-air inlet pipe, 14-air outlet pipe, 15-first sealing gasket, 16-second sealing gasket, 17-connecting board, 18-controller, 19-battery pack, 20-photovoltaic panel assembly, 21-louvers, 22-left water inlet pipe, 23-right water inlet pipe; 1.1 - Base plate, 1.2 - First mounting chamber, 1.3 - Second mounting chamber; 1.1.1 - Second air inlet, 1.1.2 - Second air outlet, 1.1.3 - Sand discharge hole; 2.1 - Third air inlet; 2.2 - Third air outlet; 17.1 - First interface, 17.2 - Second interface, 17.3 - Third interface. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] like Figures 1 to 8 As shown, this embodiment provides a vehicle air conditioning system, including: an air conditioning housing 1, a bracket assembly, a sealing structure, and an air conditioning unit; The bracket assembly is used to fix the air conditioning unit 1 to the cab roof 2 of the vehicle and raise the air conditioning unit 1, forming a sand discharge space between the bottom plate 1.1 of the air conditioning unit 1 and the cab roof 2. The upper surface of the bottom plate 1.1 of the air conditioner housing 1 is divided into a first installation area and a second installation area. The sealing structure is fixedly installed in the inner cavity of the air conditioner housing 1. The sealing structure is used to divide the inner cavity into a first installation chamber 1.2 above the first installation area and a second installation chamber 1.3 above the second installation area. The air conditioning unit includes an air conditioning refrigeration circuit, a blower 3, and a condenser fan 4; The blower 3 and the evaporator 5 of the air conditioning refrigeration circuit are fixedly installed in the second installation chamber 1.3; The outer wall of the air conditioning unit 1 is provided with a first air inlet and a first air outlet; both the first air inlet and the first air outlet are connected to the first installation chamber 1.2. The condenser 6 of the air conditioning refrigeration circuit is fixedly installed in the first installation chamber 1.2, and the condenser fan 4 is fixedly installed on the first air inlet or the first air outlet. The condenser fan 4 is used to drive the air outside the air conditioning unit 1 to pass through the first air inlet, the condenser 6 and the first air outlet in sequence and then return to the outside of the air conditioning unit 1. The second installation area is provided with a second air inlet 1.1.1 and a second air outlet 1.1.2. Both the second air inlet 1.1.1 and the second air outlet 1.1.2 are used to connect the vehicle’s driver’s cabin. The blower 3 is used to drive the air in the driver’s cabin to pass through the second air inlet 1.1.1, the evaporator 5 and the second air outlet 1.1.2 in sequence and then return to the driver’s cabin. Multiple sand discharge holes 1.1.3 are provided in the first installation area. The sand discharge holes 1.1.3 are used to discharge sand and dust in the first installation chamber 1.2 into the sand discharge space.

[0038] By using a condenser fan 4 to drive air from outside the air conditioning unit 1 through the first air inlet, condenser 6, and first air outlet before returning to the outside of the air conditioning unit 1, a cooling external circulation air path is formed between the outside of the vehicle and the first mounting chamber 1.2. By using a blower 3 to drive air from inside the passenger compartment through the second air inlet 1.1.1, evaporator 5, and second air outlet 1.1.2 before returning to the passenger compartment, a cooling internal circulation air path is formed between the passenger compartment and the second mounting chamber 1.3. A sealing structure is used to separate the cooling external circulation air path from the cooling internal circulation air path. The cold internal circulation air path is completely isolated, so the air conditioning system of the vehicle provided by this invention essentially only has an internal circulation mode. When operating in a desert environment, the dusty outside air cannot directly enter the second installation chamber 1.3 and the driver's cabin, which can greatly reduce the adhesion of fine sand and dust on the evaporator 5, ensuring the heat absorption efficiency of the evaporator 5. After the air conditioning intake filter is installed on the second air inlet 1.1.1, the air conditioning intake filter is not easy to become clogged, which can ensure the airflow through the evaporator 5 and ensure the heat absorption energy of the evaporator 5. The force is stable; at the same time, by opening multiple sand discharge holes 1.1.3 in the first installation area, a sand discharge channel is formed in the first installation chamber 1.2. Gravity, vehicle vibration, natural wind, and the airflow driven by the condenser fan 4 can be used to discharge the sand and dust in the first installation chamber 1.2 (including sand and dust adsorbed on the condenser 6, sand and dust floating in the first installation chamber 1.2, and sand and dust accumulated in the first installation chamber 1.2) into the sand discharge space through the sand discharge holes 1.1.3. Then, the natural wind during vehicle movement is used to clear the sand and dust from the sand discharge space. The sand and dust inside the compartment and falling onto the roof 2 of the cab are blown away, which can effectively reduce the accumulation of sand and dust in the first installation chamber 1.2 and reduce the adhesion of fine sand and dust to the condenser 6. Therefore, when the air conditioning system of the vehicle provided by the present invention is running in a desert environment, it can reduce the amount of fine sand and dust adhering to the condenser 6 and evaporator 5, and prevent fine sand and dust from clogging the air conditioning intake filter. It has the advantages of effectively improving the heat exchange capacity of the condenser 6 and the heat absorption performance of the evaporator 5, resulting in good air conditioning performance and good cooling effect.

[0039] The specific composition of an air conditioning refrigeration circuit is common knowledge in the field. It usually includes a refrigerant pipe, as well as a compressor, condenser, expansion valve and evaporator installed on the refrigerant pipe; in some cases, it also includes a dryer installed on the refrigerant pipe.

[0040] In this embodiment, as Figure 3 As shown, the air conditioning refrigeration circuit includes a refrigerant pipeline 7 connected end to end, and a compressor 8, a condenser 6, an expansion valve 9 and an evaporator 5 installed sequentially on the refrigerant pipeline 7.

[0041] Specifically, in this embodiment, such as Figure 3 As shown, the air conditioning refrigeration circuit also includes a dryer 10 installed on the refrigerant line 7; the dryer 10 is installed on the refrigerant line 7 between the condenser 6 and the expansion valve 9.

[0042] Specifically, in this embodiment, such as Figure 1 , Figure 2 , Figure 4 and Figure 7 As shown, the bracket assembly includes multiple mounting brackets 11, each of which is fixedly connected between the base plate 1.1 and the cab roof plate 2, and the mounting brackets 11 are arranged at intervals along the outer periphery of the base plate 1.1.

[0043] Preferably, in this embodiment, the number of air conditioning units is multiple; The number of first air inlets is the same as the number of air conditioning units and they are set one-to-one. The number of first air outlets is the same as the number of air conditioning units and they are set one-to-one. The number of second air outlets 1.1.2 is the same as the number of air conditioning units and they are set one-to-one. The number of second air inlets 1.1.1 is one. The condenser fan 4 is used to drive the air outside the air conditioning unit 1 to pass through the corresponding first air inlet, the condenser 6 of the same air conditioning unit, and the corresponding second air outlet 1.1.2 before returning to the outside of the air conditioning unit 1. The blower 3 is used to drive the air in the cockpit to pass through the second air inlet 1.1.1, the evaporator 5 of the same air conditioning unit, and the corresponding second air outlet 1.1.2 before returning to the cockpit.

[0044] Preferably, in this embodiment, such as Figure 3 As shown (in) Figure 3 In the middle, the base plate 1.1 is hidden), the first mounting area surrounds the outer periphery of the second mounting area; The sealing structure is a sealing cover 12. The lower end of the sealing cover 12 is set as an opening. The outer edge of the opening is used to seal and fix the upper surface of the base plate 1.1.

[0045] Specifically, in this embodiment, such as Figures 2 to 4As shown, there are two air conditioning units; the two air conditioning units are arranged symmetrically in the air conditioning unit 1. The second installation area is divided into the following sub-areas along the left and right directions: the left air outlet sub-area, the left evaporator 5 installation sub-area, the air inlet sub-area, the right evaporator 5 installation sub-area, and the right air outlet sub-area. The blower 3 of the air conditioning unit on the left is installed in the left air outlet sub-area, and the evaporator 5 is installed in the left evaporator 5 installation sub-area; the blower 3 of the air conditioning unit on the right is installed in the right air outlet sub-area, and the evaporator 5 is installed in the right evaporator 5 installation sub-area. The condenser 6 of the air conditioning unit on the left is located on the left side of the sealing cover 12, and the condenser 6 of the air conditioning unit on the right is located on the right side of the sealing cover 12. The second air inlet 1.1.1 is located within the air inlet sub-area, the second air outlet corresponding to the left air conditioning unit is located within the left air outlet sub-area, and the second air outlet 1.1.2 corresponding to the right air conditioning unit is located within the right air outlet sub-area.

[0046] By aligning the left-right direction of the air conditioning unit 1 with that of the vehicle during installation, the two symmetrically arranged air conditioning units within the unit can expand the functionality of the vehicle's air conditioning system, enabling more precise cooling control. This allows the air conditioning system to control the operation of the two units based on the direction of sunlight and the real-time interior temperature (e.g., when sunlight is coming from the left side of the vehicle and the interior temperature does not exceed a preset temperature threshold, the left-side air conditioning unit can be controlled to operate, causing air to exit from the left-side second air outlet 1.1.2). This improves the targeted cooling and environmental adaptability of the driver's cab, making the air conditioning system more intelligent. Furthermore, the configuration of two independently operating air conditioning units provides redundancy and backup for the system, enhancing its reliability.

[0047] Preferably, in this embodiment, such as Figures 5 to 7 As shown, the vehicle's air conditioning system also includes a cooling air intake structure and two cooling air outlet structures; the cooling air intake structure includes an air intake pipe 13 and a third air intake 2.1 opened on the cab roof panel 2; The air inlet duct 13 is a vertically arranged tube, used to connect the second air inlet 1.1.1 and the third air inlet 2.1. The bottom end of the air inlet pipe 13 is fixedly connected to the upper surface of the cab roof 2 or integrally formed, and the top end of the air inlet pipe 13 is sealed to the outer edge of the lower end of the second air inlet 1.1.1. Two cooling air outlet structures are set up one-to-one with two second air outlets 1.1.2; The cooling air outlet structure includes an air outlet 14 and a third air outlet 2.2 opened on the cab roof 2; the air outlet 14 is a vertically arranged tube, which is used to connect the third air outlet 2.2 and the corresponding second air outlet 1.1.2. The bottom end of the air outlet 14 is fixedly connected to the upper surface of the cab roof 2 or integrally formed, and the top end of the air outlet 14 is sealed to the outer edge of the lower end of the corresponding second air outlet 1.1.2.

[0048] Preferably, in this embodiment, such as Figures 5 to 7 As shown, the cooling air inlet structure also includes a first sealing gasket 15, and the cooling air outlet structure also includes a second sealing gasket 16. The first sealing gasket 15 is installed between the top of the air inlet pipe 13 and the outer edge of the lower end of the second air inlet 1.1.1. The upper surface of the first sealing gasket 15 is used to press and fit tightly against the outer edge of the lower end of the second air inlet 1.1.1, and the lower surface of the first sealing gasket 15 is used to press and fit tightly against the top of the air inlet pipe 13. The second sealing gasket 16 is installed between the top of the air outlet duct 14 and the outer edge of the lower end of the corresponding second air outlet 1.1.2. The upper surface of the second sealing gasket 16 is used to press and fit tightly against the outer edge of the lower end of the corresponding second air inlet 1.1.1, and the lower surface of the second sealing gasket 16 is used to press and fit tightly against the top of the air outlet duct 14 (the air outlet duct 14 of the same cooling air outlet structure).

[0049] By installing a first sealing gasket 15 between the top of the air inlet pipe 13 and the outer edge of the lower end of the second air inlet 1.1.1, and a second sealing gasket 16 between the top of the air outlet pipe 14 and the outer edge of the lower end of the corresponding second air outlet 1.1.2, the air inlet pipe 13 and the second air inlet 1.1.1, as well as the air outlet pipe 14 and the corresponding second air outlet 1.1.2, can be sealed without rigidly connecting the air inlet pipe 13 and the air conditioning unit 1, and the air outlet pipe 14 and the air conditioning unit 1. This effectively prevents the connection points of the air inlet pipe 13 and the air conditioning unit 1, the air inlet pipe 13 and the cab roof 2, the air outlet pipe 14 and the air conditioning unit 1, and the air outlet pipe 14 and the cab roof 2 from cracking due to vehicle vibration or other factors, which could lead to seal failure and allow sand and dust to enter the cab and the second installation chamber 1.3 through the cracks.

[0050] Preferably, in this embodiment, such as Figures 5 to 7 As shown, the top edge of the air inlet pipe 13 is turned outward or inward to form a first annular connecting part, and the top edge of the air outlet pipe 14 is turned outward or inward to form a second annular connecting part. The upper surface of the first annular connecting part is used to press and adhere tightly to the lower surface of the first sealing gasket 15; The upper surface of the second annular connection of the air outlet duct 14 is used to press and fit tightly against the lower surface of the second sealing gasket 16 of the same cooling air outlet structure.

[0051] By setting the first annular connecting part and the second annular connecting part, the pressing and fitting area between the air inlet pipe 13 and the first sealing gasket 15, and the pressing and fitting area between the air outlet pipe 14 and the second sealing gasket 16 can be effectively increased; the sealing reliability between the air inlet pipe 13 and the second air inlet 1.1.1, and the sealing reliability between the air outlet pipe 14 and the corresponding second air outlet 1.1.2 can be effectively improved.

[0052] Specifically, in this embodiment, such as Figure 2 As shown, the vehicle's air conditioning system also includes a junction box 17; The second air inlet 1.1.1 and / or the second air outlet 1.1.2 are also used for the wiring harness in the cockpit to pass into the second mounting chamber 1.3; The sealing cover 12 has a mounting hole on its front or rear side, which connects to the first mounting chamber 1.2 and the second mounting chamber 1.3. The terminal block 17 is fixedly installed in the mounting hole. The terminal block 17 is used to connect the wire harness in the first mounting chamber and the wire harness in the second mounting chamber 1.3. The terminal block 17 is also used to seal the mounting hole.

[0053] By setting the junction box 17, a connection channel can be provided between the wire harness in the first mounting chamber 1.2 and the second mounting chamber 1.3 while maintaining the sealed isolation between them. This avoids the situation where the sealing performance of the sealing cover 12 is reduced due to the need to open wire holes on the sealing cover 12.

[0054] Specifically, in this embodiment, such as Figure 2 As shown, the vehicle's air conditioning system also includes a controller 18, a battery pack 19, and a photovoltaic panel assembly 20. The battery pack 19 is fixedly installed in the second mounting chamber 1.3; the photovoltaic panel assembly 20 is located on the upper side of the air conditioning unit 1 and is fixedly installed on the air conditioning unit 1. The air conditioning unit, photovoltaic panel 20 and battery pack 19 are all electrically connected to the controller 18, which is also electrically connected to the vehicle's power battery. The controller 18 is used to control the photovoltaic panel module 20 to charge the battery pack 19 and the power battery. The controller 18 is also used to switch the power supply of the air conditioning unit between the battery pack 19 and the power battery.

[0055] By setting up the battery pack 19 and photovoltaic panel 20, not only can additional power be provided to each air conditioning unit, but the air conditioning system of the vehicle provided by the present invention can also make full use of the abundant sunlight in the desert area to generate electricity in real time, and replenish the battery pack 19 and the vehicle's power battery. When operating in the desert environment, it can not only offset the impact of air conditioning energy consumption on the vehicle's range, but also improve the vehicle's range and further improve its adaptability to the desert environment.

[0056] By fixing the battery pack 19 inside the second mounting chamber 1.3, the battery pack 19 can also be cooled by internal air circulation.

[0057] Specifically, in this embodiment, the controller 18 is fixedly installed in the first mounting chamber 1.2.

[0058] Specifically, in this embodiment, the battery pack 19 is used to provide 350V DC power to the air conditioning unit, and the controller 18 is used to control the normal operation of the air conditioning unit and can also convert the 350V DC power provided by the battery pack into 24V DC power to drive low-voltage electrical equipment such as the blower 3.

[0059] Specifically, in this embodiment, such as Figure 9 As shown, the junction box 17 is equipped with a first interface 17.1, a second interface 17.2, and a third interface 17.3. The first interface 17.1 is for the photovoltaic panel module 20 to supply power to the battery pack 19; the second interface 17.2 is for the air conditioning unit to draw power from the vehicle's power battery; and the third interface 17.3 is the air conditioning control panel interface, used for communication between the controller 18 and the air conditioning control panel in the driver's cab. This enables the air conditioning control panel in the driver's cab to control the temperature, airflow, and other functions of the air conditioning system. Different connector specifications are used as a preventative measure against incorrect installation.

[0060] Specifically, in this embodiment, such as Figure 2 and Figure 5 As shown, the battery pack 19 is fixedly connected to the inner wall of the mounting cover and is positioned above the second air inlet 1.1.1.

[0061] By fixing the battery pack 19 above the second air inlet 1.1.1, the air in the cockpit driven by the blower 3 flows through the second air inlet 1.1.1, the battery, the evaporator 5 and the corresponding second air outlet 1.1.2 and back into the cockpit; ensuring that the battery pack 19 is always in the internal circulation air path, thus ensuring the cooling effect of the internal circulation air path on the battery pack 19.

[0062] Specifically, in this embodiment, such as Figure 1 , Figure 2 , Figure 5 , Figure 6, Figure 7 , Figure 8 , Figure 10 and Figure 11 As shown, the first air outlet corresponding to the air conditioning unit on the left is located on the left wall of the air conditioning unit 1, and the first air outlet corresponding to the air conditioning unit on the right is located on the right wall of the air conditioning unit 1; the condenser fan 4 is fixedly installed in the corresponding first air outlet. The first air inlet includes two air inlets; the two air inlets corresponding to the condenser 6 are respectively opened on the front wall and the rear wall of the air conditioning unit 1; the two air inlets corresponding to the condenser 6 are respectively located on the front side and the rear side of the condenser 6.

[0063] Preferably, in this embodiment, such as Figure 5 As shown, the top of the left wall of the air conditioning unit 1 tilts to the right, and the top of the right wall of the air conditioning unit 1 tilts to the left. The heat dissipation surface of the left condenser 6 faces the left wall of the air conditioning unit 1, and the heat dissipation surface of the right condenser 6 faces the right wall of the air conditioning unit 1. The top of the left condenser 6 is tilted to the right, and the top of the right condenser 6 is tilted to the left.

[0064] By tilting the condenser 6, the heat dissipation area of ​​the condenser 6 can be increased compared to a vertical setting, thus improving the heat dissipation performance of the condenser 6. Gravity also makes it less likely for sand and dust to adhere to the condenser 6, and makes it easier for the condenser fan 4 to blow away the sand and dust attached to the condenser 6.

[0065] Specifically, in this embodiment, such as Figure 6 , Figure 7 , Figure 8 and Figure 11 As shown, a louver 21 is installed in the air inlet.

[0066] By installing louvers 21 in the air inlet, the amount of sand and dust drawn into the first installation chamber 1.2 can be effectively reduced.

[0067] Specifically, in this embodiment, the air conditioning unit also includes a drainage pipe; The drain pipe is installed in the first installation chamber 1.2. One end of the drain pipe of the left air conditioning unit is connected to the sealing cover 12 and then connected to the water receiving pan of the left evaporator 5. The other end extends out from the lower side of the left wall of the air conditioning unit 1 to the outside of the air conditioning unit 1. One end of the drain pipe of the right air conditioning unit is connected to the sealing cover 12 and then connected to the water receiving pan of the right evaporator 5. The other end extends out from the lower side of the right wall of the air conditioning unit 1 to the outside of the air conditioning unit 1.

[0068] Specifically, in this embodiment, such as Figure 10 and Figure 11As shown, the vehicle's air conditioning system also includes a left water inlet pipe 22 and a right water inlet pipe 23 that are fixedly installed outside the vehicle body. Both the left water inlet pipe 22 and the right water inlet pipe 23 extend along the front-rear direction of the vehicle. The left water pipe 22 is located on the left side of the vehicle body, and the right water pipe 23 is located on the right side of the vehicle body. The left water pipe 22 is connected to the end of the drain pipe of the left air conditioning unit that extends out to the outside of the air conditioning box 1, and the right water pipe 23 is connected to the end of the drain pipe of the right air conditioning unit that extends out to the outside of the air conditioning box 1. The rear ends of both the left water inlet pipe 22 and the right water inlet pipe 23 extend to the lower side of the rear of the vehicle body, and the rear ends of both the left water inlet pipe 22 and the right water inlet pipe 23 are used for drainage.

[0069] By installing a drain pipe to drain the condensate from the air conditioner to the lower rear of the vehicle, it is possible to prevent the condensate from mixing with dust in the air and forming mud that adheres to the vehicle body. Furthermore, by placing the drain outlet (i.e., the opening at the rear end of the drain pipe) on the lower rear of the vehicle and increasing the distance and height difference between the drain outlet and the air conditioning unit 1, it is possible to prevent dust in the air from entering the air conditioning unit 1 through the drain pipe.

[0070] Specifically, in this embodiment, such as Figure 2 As shown, the compressor 8 of the air conditioning refrigeration circuit is fixedly installed in the first installation chamber 1.2.

[0071] Specifically, in this embodiment, such as Figure 2 As shown, the drying tank 10 of the air conditioning refrigeration circuit is fixedly installed in the first installation chamber 1.2.

[0072] By integrating the expansion valve 9, compressor 8, and dryer 10 into the air conditioning unit 1 and placing them in the first mounting chamber 1.2, a compact and integrated design of the vehicle's air conditioning system can be achieved.

[0073] The control method for the vehicle air conditioning system provided in this embodiment can be designed with reference to the following control principles.

[0074] Firstly, the charging control principle of the photovoltaic panel module 20 to the battery pack 19: When the weather is sunny and the battery pack 19 is detected to be below 100% charge, it can be automatically charged by the photovoltaic panel 20. During charging, if the temperature of the battery pack 19 is detected to be higher than a first set threshold, the blower 3 is automatically activated to cool the battery pack 19. If the temperature exceeds the first set threshold and continues to rise, and the ambient temperature outside the vehicle is higher than a set temperature value, the compressor 8 is further activated to provide cool air to the battery pack 19 for cooling. When the battery pack 19 reaches the high-temperature alarm limit, the charging circuit is cut off, causing the photovoltaic panel 20 to stop charging the battery pack 19. The high-temperature alarm limit is higher than the first set threshold.

[0075] Secondly, the principles of cooling control in the cockpit: When the controller 18 receives the air conditioning start information, set temperature information, and set airflow information from the air conditioning control panel, the controller 18 controls the vehicle's air conditioning system to enter cooling mode and controls the compressor 8 to operate normally at the required speed according to the preset cooling capacity. Then, the controller 18 uses sensors to collect environmental parameters (such as, but not limited to, external ambient temperature information, interior temperature information, light intensity information, light incidence angle information, and power battery temperature information), calculates the target cooling capacity based on the collected environmental parameters, and further adjusts the speed of the compressor 8 and the airflow of the blower 3 according to the target cooling capacity. In addition, when the external ambient temperature is low and below the set temperature threshold, or when the interior temperature reaches the set target requirement (i.e., the interior temperature is no higher than the target temperature set in the set temperature information sent by the air conditioning control panel), the controller 18 can control the compressor 8 of the air conditioning unit facing the light incidence direction to turn on and the compressor 8 of the air conditioning unit on the other side to turn off, so that only the air conditioning on the side facing the light incidence direction is cooled, thereby achieving energy saving.

[0076] The vehicle air conditioning system provided by this invention has at least the following technical effects or advantages: 1. By using the condenser fan 4 to drive the air outside the air conditioning unit 1 through the first air inlet, condenser 6, and first air outlet, it returns to the outside of the air conditioning unit 1, forming a heat dissipation external circulation air path between the outside of the vehicle and the first mounting chamber 1.2. By using the blower 3 to drive the air inside the passenger compartment through the second air inlet 1.1.1, evaporator 5, and second air outlet 1.1.2, it returns to the passenger compartment, forming a cooling internal circulation air path between the passenger compartment and the second mounting chamber 1.3. A sealing structure is used to separate the heat dissipation external circulation air path and the... The cooling internal circulation air path is completely isolated, so the vehicle air conditioning system provided by this invention essentially only has an internal circulation mode. When operating in a desert environment, the dusty outside air cannot directly enter the second installation chamber 1.3 and the driver's cabin, which can greatly reduce the adhesion of fine sand and dust on the evaporator 5, ensuring the heat absorption efficiency of the evaporator 5. After installing the air conditioning intake filter on the second air inlet 1.1.1, the air conditioning intake filter is not prone to clogging, which can ensure the airflow through the evaporator 5 and ensure the heat absorption of the evaporator 5. The system provides stable performance. Simultaneously, by creating multiple sand-discharging holes 1.1.3 in the first installation area, a sand-discharging channel is formed within the first installation chamber 1.2. Gravity, vehicle vibration, natural wind, and the airflow driven by the condenser fan 4 are used to discharge sand and dust (including sand and dust adsorbed on the condenser 6, sand and dust floating within the first installation chamber 1.2, and sand and dust accumulated within the first installation chamber 1.2) into the sand-discharging space through the sand-discharging holes 1.1.3. The natural wind generated by the vehicle's movement further facilitates the sand discharge. The sand and dust in the space and falling onto the cab roof 2 are blown away, which can effectively reduce the accumulation of sand and dust in the first installation chamber 1.2 and reduce the adhesion of fine sand and dust to the condenser 6. Therefore, when the air conditioning system of the vehicle provided by the present invention is running in a desert environment, it can reduce the amount of fine sand and dust adhering to the condenser 6 and evaporator 5, and prevent fine sand and dust from clogging the air conditioning intake filter. It has the advantages of effectively improving the heat exchange capacity of the condenser 6 and the heat absorption performance of the evaporator 5, resulting in good air conditioning performance and good cooling effect.

[0077] 2. By aligning the left-right direction of the air conditioning unit 1 with that of the vehicle during installation, the two symmetrically arranged air conditioning units within the unit can expand the functionality of the vehicle's air conditioning system, enabling more precise cooling control. This allows the vehicle's air conditioning system to control the operation of the two units based on the direction of sunlight and the real-time interior temperature (e.g., when sunlight is coming from the left side of the vehicle and the interior temperature does not exceed a preset temperature threshold, the left-side air conditioning unit can be controlled to operate, causing air to exit from the second air outlet 1.1.2 on the left). This improves the targeted cooling and environmental adaptability of the cab, making the vehicle's air conditioning system more intelligent. Furthermore, the configuration of two independently operating air conditioning units provides redundancy and backup for the vehicle's air conditioning system, enhancing its reliability.

[0078] 3. By installing a first sealing gasket 15 between the top of the air inlet pipe 13 and the outer edge of the lower end of the second air inlet 1.1.1, and a second sealing gasket 16 between the top of the air outlet pipe 14 and the outer edge of the lower end of the corresponding second air outlet 1.1.2, the air inlet pipe 13 and the second air inlet 1.1.1, as well as the air outlet pipe 14 and the corresponding second air outlet 1.1.2, can be sealed without rigidly connecting the air inlet pipe 13 and the air conditioning unit 1, and the air outlet pipe 14 and the air conditioning unit 1. This effectively prevents the connection points of the air inlet pipe 13 and the air conditioning unit 1, the air inlet pipe 13 and the cab roof 2, the air outlet pipe 14 and the air conditioning unit 1, and the air outlet pipe 14 and the cab roof 2 from cracking due to vehicle vibration and other factors, which could lead to sealing failure and allow sand and dust to enter the cab and the second installation chamber 1.3 from the cracks.

[0079] 4. By setting the first annular connecting part and the second annular connecting part, the pressing and fitting area between the air inlet pipe 13 and the first sealing gasket 15, and the pressing and fitting area between the air outlet pipe 14 and the second sealing gasket 16 can be effectively improved; the sealing reliability between the air inlet pipe 13 and the second air inlet 1.1.1, and the sealing reliability between the air outlet pipe 14 and the corresponding second air outlet 1.1.2 can be effectively improved.

[0080] 5. By setting the junction box 17, a connection channel can be provided between the wire harness in the first mounting chamber 1.2 and the second mounting chamber 1.3 while maintaining the sealed isolation between them. This avoids the situation where the sealing performance of the sealing cover 12 is reduced due to the need to open wire holes on the sealing cover 12.

[0081] 6. By setting up the battery pack 19 and photovoltaic panel 20, not only can additional power be provided to each air conditioning unit, but the air conditioning system of the vehicle provided by the present invention can also make full use of the abundant sunlight in the desert area to generate electricity in real time, and replenish the battery pack 19 and the vehicle's power battery. When running in the desert environment, it can not only offset the impact of air conditioning energy consumption on the vehicle's range, but also improve the vehicle's range and further improve its adaptability to the desert environment.

[0082] 7. By fixing the battery pack 19 inside the second mounting chamber 1.3, the battery pack 19 can also be cooled by internal air circulation.

[0083] 8. By fixing the battery pack 19 above the second air inlet 1.1.1, the air in the cockpit driven by the blower 3 flows through the second air inlet 1.1.1, the battery, the evaporator 5 and the corresponding second air outlet 1.1.2 and then back into the cockpit; ensuring that the battery pack 19 is always in the internal circulation air path, and ensuring the cooling effect of the internal circulation air path on the battery pack 19.

[0084] 9. By tilting the condenser 6, the heat dissipation area of ​​the condenser 6 can be increased compared to a vertical setting, thus improving the heat dissipation performance of the condenser 6. Gravity makes it less likely for sand and dust to adhere to the condenser 6, and also makes it easier for the condenser fan 4 to blow off the sand and dust attached to the condenser 6.

[0085] 10. By installing louvers 21 in the air inlet, the amount of sand and dust drawn into the first installation chamber 1.2 can be effectively reduced.

[0086] 11. By installing a water pipe to drain the condensate from the air conditioner to the lower rear of the vehicle, it is possible to prevent the condensate from mixing with dust in the air and forming mud that adheres to the vehicle body. Furthermore, by placing the drain outlet (i.e., the opening at the rear end of the water pipe) on the lower rear of the vehicle and increasing the distance and height difference between the drain outlet and the air conditioning unit 1, it is possible to prevent dust in the air from entering the air conditioning unit 1 through the drain pipe.

[0087] 12. By integrating the expansion valve 9, compressor 8 and dryer 10 into the air conditioning unit 1 and placing them in the first mounting chamber 1.2, a compact and integrated design of the vehicle's air conditioning system can be achieved.

[0088] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of the present invention.

Claims

1. An air conditioning system for a vehicle, characterized by comprising: include: Air conditioning unit housing, bracket assembly, sealing structure, and air conditioning unit; The bracket assembly is used to fix the air conditioning unit to the roof of the vehicle's cab and raise the air conditioning unit, forming a sand-discharging space between the bottom plate of the air conditioning unit and the roof of the cab. The upper surface of the bottom plate of the air conditioner housing is divided into a first installation area and a second installation area. The sealing structure is fixedly installed in the inner cavity of the air conditioner housing. The sealing structure is used to divide the inner cavity into a first installation chamber above the first installation area and a second installation chamber above the second installation area. The air conditioning unit includes an air conditioning refrigeration circuit, a blower, and a condenser fan; The blower and the evaporator of the air conditioning refrigeration circuit are fixedly installed in the second mounting chamber; The outer wall of the air conditioning unit is provided with a first air inlet and a first air outlet; the first air inlet and the first air outlet are both connected to the first mounting chamber; the condenser of the air conditioning refrigeration circuit is fixedly installed in the first mounting chamber; the condenser fan is fixedly installed on the first air inlet or the first air outlet; the condenser fan is used to drive the air outside the air conditioning unit to pass through the first air inlet, the condenser and the first air outlet in sequence and then return to the outside of the air conditioning unit. The second installation area is provided with a second air inlet and a second air outlet, both of which are used to connect to the driver's cabin of the vehicle. The blower is used to drive the air in the cockpit to return to the cockpit after passing through the second air inlet, the evaporator and the second air outlet in sequence. The first installation area is provided with a plurality of sand discharge holes, which are used to discharge sand and dust in the first installation chamber into the sand discharge space.

2. The air conditioning system of a vehicle according to claim 1, characterized by: The number of air conditioning units is multiple; The number of the first air inlets is the same as the number of the air conditioning units and they are set in a one-to-one correspondence. The number of the first air outlets is the same as the number of the air conditioning units and they are set in a one-to-one correspondence. The number of the second air outlets is the same as the number of the air conditioning units and they are set in a one-to-one correspondence. The number of the second air inlets is one. The condenser fan is used to drive the air outside the air conditioning unit to pass through the corresponding first air inlet, the condenser of the same air conditioning unit, and the corresponding second air outlet in sequence before returning to the outside of the air conditioning unit. The blower is used to drive the air in the cockpit to pass sequentially through the second air inlet, the evaporator of the same air conditioning unit, and the corresponding second air outlet before returning to the cockpit.

3. The air conditioning system of a vehicle according to claim 2, characterized by: The first mounting area surrounds the outer periphery of the second mounting area; The sealing structure is a sealing cover, the lower end of which is set as an opening, and the outer edge of the opening is used to seal and fix it to the upper surface of the base plate.

4. The air conditioning system of a vehicle according to claim 3, characterized by: The number of air conditioning units is two; the two air conditioning units are arranged symmetrically in the air conditioning unit. The second installation area is divided into the left air outlet sub-area, the left evaporator installation sub-area, the air inlet sub-area, the right evaporator installation sub-area, and the right air outlet sub-area in sequence along the left and right directions. The blower of the air conditioning unit on the left is installed in the left air outlet sub-area, and the evaporator is installed in the left evaporator mounting sub-area; the blower of the air conditioning unit on the right is installed in the right air outlet sub-area, and the evaporator is installed in the right evaporator mounting sub-area. The condenser of the air conditioning unit on the left is located on the left side of the sealing cover, and the condenser of the air conditioning unit on the right is located on the right side of the sealing cover; The second air inlet is located within the air inlet sub-area, the second air outlet corresponding to the air conditioning unit on the left is located within the left air outlet sub-area, and the second air outlet corresponding to the air conditioning unit on the right is located within the right air outlet sub-area.

5. The air conditioning system of a vehicle according to claim 4, characterized by: It also includes a cooling air intake structure and two cooling air outlet structures; the cooling air intake structure includes an air intake pipe and a third air intake port opened on the top plate of the cab; The air inlet pipe is a vertically arranged tube, used to connect the second air inlet and the third air inlet. The bottom end of the air inlet pipe is fixedly connected to or integrally formed with the upper surface of the cab roof, and the top end of the air inlet pipe is sealed to the outer edge of the lower end of the second air inlet. The two cooling air outlet structures are configured to correspond one-to-one with the two second air outlets; The cooling air outlet structure includes an air outlet pipe and a third air outlet on the cab roof panel; the air outlet pipe is a vertically arranged tube, which is used to connect the third air outlet and the corresponding second air outlet. The bottom end of the air outlet pipe is fixedly connected to the upper surface of the cab roof panel or integrally formed, and the top end of the air outlet pipe is sealed to the outer edge of the lower end of the corresponding second air outlet.

6. The air conditioning system of a vehicle according to claim 5, characterized by: Furthermore, the cooling air inlet structure also includes a first sealing gasket, and the cooling air outlet structure also includes a second sealing gasket; The first sealing gasket is installed between the top end of the air inlet pipe and the outer edge of the lower end of the second air inlet. The upper surface of the first sealing gasket is used to press and fit tightly against the outer edge of the lower end of the second air inlet, and the lower surface of the first sealing gasket is used to press and fit tightly against the top end of the air inlet pipe. The second sealing gasket is installed between the top end of the air outlet pipe and the outer edge of the lower end of the corresponding second air outlet. The upper surface of the second sealing gasket is used to press and fit tightly against the outer edge of the lower end of the corresponding second air inlet, and the lower surface of the second sealing gasket is used to press and fit tightly against the top end of the air outlet pipe.

7. The air conditioning system of a vehicle according to claim 4, characterized by: It also includes a power strip; The second air inlet and / or the second air outlet are also used for the wiring harness in the cockpit to pass into the second mounting chamber; The sealing cover has a mounting hole on its front or rear side, which connects the first mounting chamber and the second mounting chamber. The terminal block is fixedly installed in the mounting hole. The terminal block is used to connect the wire harness in the first mounting chamber and the wire harness in the second mounting chamber. The terminal block is also used to seal the mounting hole.

8. The air conditioning system for a vehicle according to claim 4, characterized in that: It also includes a controller, a battery pack, and a photovoltaic panel assembly. The battery pack is fixedly installed in the second mounting chamber. The photovoltaic panel assembly is disposed on the upper side of the air conditioning unit and fixedly installed on the air conditioning unit. The air conditioning unit, the photovoltaic panel assembly, and the battery pack are all electrically connected to the controller, which is also electrically connected to the vehicle's power battery. The controller is used to control the photovoltaic panel assembly to charge the battery pack and the power battery. The controller is also used to switch the power supply of the air conditioning unit between the battery pack and the power battery.

9. The air conditioning system for a vehicle according to claim 4, characterized in that: The first air outlet corresponding to the air conditioning unit on the left is located on the left wall of the air conditioning unit, and the first air outlet corresponding to the air conditioning unit on the right is located on the right wall of the air conditioning unit; the condenser fan is fixedly installed in the corresponding first air outlet. The first air inlet includes two air inlets; the two air inlets corresponding to the condenser are respectively opened on the front wall and the rear wall of the air conditioning unit; the two air inlets corresponding to the condenser are respectively located on the front side and the rear side of the condenser.

10. The air conditioning system of a vehicle according to claim 4, characterized by: The air conditioning unit also includes a drainage pipe; The drain pipe is installed in the first installation chamber. One end of the drain pipe of the air conditioning unit on the left is connected to the sealing cover and then communicates with the water receiving tray of the evaporator on the left. The other end extends out from the lower side of the left wall of the air conditioning unit to the outside of the air conditioning unit. One end of the drain pipe of the air conditioning unit on the right is connected to the sealing cover and then communicates with the water receiving tray of the evaporator on the right. The other end extends out from the lower side of the right wall of the air conditioning unit to the outside of the air conditioning unit.

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