Bus and its body and passenger compartment ventilation structure

Abstract

This utility model relates to the field of vehicle technology, specifically to a bus and its body and passenger compartment exhaust structure. The bus body includes a passenger compartment, and an exhaust structure is provided on the floor of the passenger compartment. The exhaust structure has an exhaust port that connects the interior space of the passenger compartment with the space under the floor of the passenger compartment, allowing air inside the passenger compartment to be exhausted to the outside. By placing the exhaust structure on the floor of the passenger compartment and utilizing the space under the floor for exhaust, stale air inside the passenger compartment can be exhausted to the outside through the exhaust port of the exhaust structure on the floor. This floor-mounted exhaust structure ensures that the exhaust structure is in a low position and is away from the engine, making it less susceptible to engine noise and thus contributing to passenger comfort.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to passenger cars and their body and passenger compartment ventilation structure. Background Technology

[0002] Buses carry a large number of passengers, making the air inside the cabin prone to becoming stale, especially when heating or cooling is on. With doors and windows closed, ventilation relies solely on the pressure difference between the inside and outside of the vehicle and passive ventilation through gaps, resulting in extremely poor efficiency and impacting both driver and passenger comfort. Therefore, active ventilation systems are typically installed, using a fresh air system and an exhaust system to achieve efficient air exchange. The fresh air system supplies fresh air to the cabin and increases the air pressure, while the exhaust system draws out stale air to increase the pressure difference between the inside and outside of the vehicle. While some buses have control switches on the dashboard, allowing the driver to turn the ventilation system on and off based on their subjective feelings and preferences, this method is heavily influenced by the driver's subjective feelings and preferences and cannot automatically activate or deactivate based on the actual air quality inside the cabin.

[0003] Existing technologies also include solutions that use carbon dioxide sensors to detect air quality and coordinate with controllers to automatically control the opening and closing of ventilation systems. For example, Chinese utility model patent CN212353535U discloses a bus interior air quality zoning adjustment device. The bus is a type of passenger vehicle, and its body includes a roof, side panels, front panel, and rear panel. A fresh air unit is installed on the roof, containing a filter. Air ducts are connected to the fresh air unit to introduce outside air into the passenger compartment. The air ducts include a main duct and branch ducts. The main duct is located on the roof of the passenger compartment and has an air inlet connected to the fresh air unit. Multiple branch ducts are connected to the main duct, and each branch duct has an air outlet and an electric damper. These electric dampers are used to close or open the air outlets, and each electric damper is electrically connected to a controller. Carbon dioxide sensors are installed on the side walls of the carriage to detect the carbon dioxide concentration inside. The controller is also electrically connected to the carbon dioxide sensors and the fresh air system. The controller receives the detection signal from the carbon dioxide sensors and controls the operation of the fresh air system and the electric air valve. Normally, when the fresh air system is running, the pressure inside the carriage increases, and the air inside the carriage can escape to the outside atmosphere through the gaps in the windows and doors. However, to improve ventilation efficiency, an exhaust port with an exhaust valve is located at the rear of the carriage. The exhaust port forms an exhaust structure, and the exhaust valve is electrically connected to the controller. When the controller controls the electric air valve to open, it also controls the exhaust valve to open simultaneously. This allows fresh air from outside to continuously enter the carriage, while the stale air inside the carriage is also exhausted outside.

[0004] The exhaust vents of the aforementioned buses are located at the bottom of the rear panel of the passenger compartment, venting rearwards. This facilitates the removal of polluted air with high carbon dioxide concentrations that have settled at the bottom of the passenger compartment. Furthermore, compared to designs with exhaust vents on the left and right sides, this avoids the exhaust structure affecting the bus's aesthetics. However, this exhaust design still has shortcomings. Since the engine is usually installed at the rear of the bus, the exhaust structure in the rear panel connects the passenger compartment to the engine compartment at the rear. Engine noise is transmitted into the passenger compartment through the exhaust structure, resulting in significant engine noise inside the passenger compartment and affecting the comfort of rear passengers. Utility Model Content

[0005] The purpose of this utility model is to provide a bus body to solve the problem that the current exhaust structure of the bus body is located in the rear enclosure, which is easily affected by the large engine noise and reduces passenger comfort; the purpose of this utility model is also to provide a bus and its passenger compartment exhaust structure to solve the above problems.

[0006] The technical solution for the bus body of this utility model is as follows:

[0007] The bus body, including the passenger compartment, has an exhaust structure on the floor of the passenger compartment. The exhaust structure has an exhaust port that connects the interior space of the passenger compartment with the space under the floor of the passenger compartment so that the air inside the passenger compartment can be exhausted to the outside of the passenger compartment.

[0008] Beneficial effects: This utility model modifies the elements of the existing bus body by setting the exhaust structure on the floor of the passenger compartment. It utilizes the space under the floor of the passenger compartment for exhaust. The polluted air inside the passenger compartment can be discharged to the outside of the passenger compartment through the exhaust port of the exhaust structure on the floor. By setting the exhaust structure on the floor, the exhaust structure is kept in a low position and away from the engine, making it less susceptible to engine noise and thus helping to ensure passenger comfort.

[0009] Furthermore, the floor is provided with a shielding component to block the exhaust vent, and the shielding component is provided with a filter structure for air to pass through.

[0010] Furthermore, the shielding component has an air intake facade facing the interior space of the vehicle compartment, and a filter structure is disposed on the air intake facade.

[0011] Furthermore, the floor includes a passenger door step, on which the aforementioned exhaust structure is provided.

[0012] Furthermore, the passenger door step has a horizontal plane and a step elevation that forms an angle with the horizontal plane. The exhaust structure installed on the passenger door step is a step area exhaust structure, which is installed on the step elevation.

[0013] Furthermore, the exhaust structure for the step area is located at the top of the step facade.

[0014] Furthermore, the floor includes a first row area for mounting the first row of seats, and the first row area is provided with the exhaust structure.

[0015] Furthermore, the exhaust structure in the first row area is a front exhaust structure, which is located on the floor where it connects with the side panel of the vehicle body.

[0016] The technical solution for the passenger car ventilation structure of this utility model is as follows:

[0017] The passenger car's ventilation structure includes the passenger car body and a ventilation module installed at the exhaust structure of the passenger car body. The ventilation module includes an exhaust fan for drawing air from the passenger car body to the floor below the exhaust port. The passenger car body includes the passenger car body, and an exhaust structure is provided on the floor of the passenger car body. The exhaust structure has an exhaust port that connects the interior space of the passenger car body with the space below the floor of the passenger car body so that the air inside the passenger car body can be exhausted to the outside of the passenger car body.

[0018] Beneficial effects: This utility model modifies the existing passenger car ventilation structure by placing the exhaust structure on the floor of the passenger car and utilizing the space under the floor for exhaust. The polluted air inside the passenger car can be exhausted to the outside of the passenger car through the exhaust port of the exhaust structure on the floor. This floor-mounted exhaust structure ensures that the exhaust structure is in a low position and is far away from the engine, making it less susceptible to engine noise and thus helping to ensure passenger comfort.

[0019] Furthermore, the floor is provided with a shielding component to block the exhaust vent, and the shielding component is provided with a filter structure for air to pass through.

[0020] Furthermore, the shielding component has an air intake facade facing the interior space of the vehicle compartment, and a filter structure is disposed on the air intake facade.

[0021] Furthermore, the floor includes a passenger door step, on which the aforementioned exhaust structure is provided.

[0022] Furthermore, the passenger door step has a horizontal plane and a step elevation that forms an angle with the horizontal plane. The exhaust structure installed on the passenger door step is a step area exhaust structure, which is installed on the step elevation.

[0023] Furthermore, the exhaust structure for the step area is located at the top of the step facade.

[0024] Furthermore, the floor includes a first row area for mounting the first row of seats, and the first row area is provided with the exhaust structure.

[0025] Furthermore, the exhaust structure in the first row area is a front exhaust structure, which is located on the floor where it connects with the side panel of the vehicle body.

[0026] Furthermore, the exhaust module is installed in the space beneath the floor.

[0027] Furthermore, the exhaust fan outlet faces one side of the vehicle body in the left-right direction.

[0028] Furthermore, the exhaust module includes an air guide housing, an exhaust fan is installed inside the air guide housing, and the air guide housing has a connection port that connects to the exhaust port and a clearance port that avoids the outlet of the exhaust fan.

[0029] The technical solution for this utility model of a passenger vehicle is as follows:

[0030] A bus, including the bus's passenger compartment ventilation structure, the bus's passenger compartment ventilation structure including the bus body and the ventilation module installed at the exhaust structure of the bus body, the ventilation module including an exhaust fan for working with the exhaust port to draw air from the passenger compartment to the floor below, the bus body including the passenger compartment, the floor of the passenger compartment having an exhaust structure, the exhaust structure having an exhaust port that connects the interior space of the passenger compartment with the space below the floor of the passenger compartment so that air from the passenger compartment can be exhausted to the outside of the passenger compartment.

[0031] Beneficial effects: This utility model modifies the existing passenger car ventilation structure by placing the exhaust structure on the floor of the passenger car and utilizing the space under the floor for exhaust. The polluted air inside the passenger car can be exhausted to the outside of the passenger car through the exhaust port of the exhaust structure on the floor. This floor-mounted exhaust structure ensures that the exhaust structure is in a low position and is far away from the engine, making it less susceptible to engine noise and thus helping to ensure passenger comfort.

[0032] Furthermore, the floor is provided with a shielding component to block the exhaust vent, and the shielding component is provided with a filter structure for air to pass through.

[0033] Furthermore, the shielding component has an air intake facade facing the interior space of the vehicle compartment, and a filter structure is disposed on the air intake facade.

[0034] Furthermore, the floor includes a passenger door step, on which the aforementioned exhaust structure is provided.

[0035] Furthermore, the passenger door step has a horizontal plane and a step elevation that forms an angle with the horizontal plane. The exhaust structure installed on the passenger door step is a step area exhaust structure, which is installed on the step elevation.

[0036] Furthermore, the exhaust structure for the step area is located at the top of the step facade.

[0037] Furthermore, the floor includes a first row area for mounting the first row of seats, and the first row area is provided with the exhaust structure.

[0038] Furthermore, the exhaust structure in the first row area is a front exhaust structure, which is located on the floor where it connects with the side panel of the vehicle body.

[0039] Furthermore, the exhaust module is installed in the space beneath the floor.

[0040] Furthermore, the exhaust fan outlet faces one side of the vehicle body in the left-right direction.

[0041] Furthermore, the exhaust module includes an air guide housing, an exhaust fan is installed inside the air guide housing, and the air guide housing has a connection port that connects to the exhaust port and a clearance port that avoids the outlet of the exhaust fan. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of an embodiment of the passenger vehicle of this utility model;

[0043] Figure 2 for Figure 1 A front view of the ventilation structure at the central door step;

[0044] Figure 3 for Figure 1 A schematic diagram of the rear of the ventilation structure at the central door step;

[0045] Figure 4 for Figure 1 A schematic diagram of the ventilation structure at the first row of seats;

[0046] Figure 5 for Figure 1 A schematic diagram of the installation of the fresh air module of the air conditioner evaporator in the air conditioning duct.

[0047] In the picture:

[0048] 10. Exhaust structure of the passenger compartment in the step area; 11. Passenger door step; 12. Exhaust structure of the step area; 13. Exhaust module of the step area;

[0049] 20. Exhaust structure of the cab at the front; 21. First row of floor area; 22. Exhaust structure of the cab at the front; 221. Cover; 23. Exhaust module of the cab at the front; 231. Exhaust fan of the cab at the front; 24. Heating radiator;

[0050] 30. Vehicle body frame;

[0051] 40. Carbon dioxide sensor;

[0052] 50. Air conditioner evaporator fresh air module; 51. Filter element; 52. Evaporator body; 53. Evaporator fan; 54. Fresh air duct; 55. Air conditioning duct;

[0053] 60. Cold and warm defrosting fresh air module. Detailed Implementation

[0054] The basic concept of this utility model is to set the exhaust structure of the bus compartment on the floor of the compartment, and use the space under the floor of the compartment for exhaust. This ensures that the exhaust structure is in a low position and is far away from the engine, so that it is not easily affected by engine noise, which helps to ensure passenger comfort.

[0055] The present invention will be described in detail below with reference to specific embodiments.

[0056] An embodiment of the passenger vehicle of this utility model:

[0057] The bus includes a passenger compartment ventilation structure, which includes the bus body and an exhaust module located at the exhaust structure of the bus body. The bus body includes the passenger compartment, and an exhaust structure is provided on the floor of the passenger compartment. The floor is the part of the bus body where the interior of the passenger compartment is located. The exhaust structure has an exhaust port that connects the interior space of the passenger compartment with the space under the floor of the passenger compartment. The exhaust module includes an exhaust fan that works with the exhaust port to draw air from inside the passenger compartment to the space under the floor, so that the air inside the passenger compartment can be exhausted to the outside of the passenger compartment.

[0058] The exhaust system for removing stale air from the passenger compartment is located on the floor of the passenger compartment. The space under the floor is separated from the interior space of the passenger compartment by the floor, and the space under the floor is open to the outside atmosphere. Stale air from the interior space of the passenger compartment can be exhausted to the outside of the passenger compartment through the exhaust port of the exhaust system on the floor. This floor-mounted exhaust system ensures that the exhaust system is in a low position and avoids being placed on the side panel, which would affect the aesthetics of the bus. It can also be placed away from the engine, so the passenger compartment is not easily affected by engine noise, which helps to ensure passenger comfort.

[0059] Combination Figure 1The vehicle body includes a body frame 30, which has portions forming the left and right side panels, front panel, rear panel, floor, and roof. The body frame 30, together with covering components, forms the passenger compartment. In this embodiment, the bus is a large bus with two passenger doors: a front door and a middle door. The front door is located in the front area and corresponds to the driver's cab, while the middle door is located in the middle and rear of the bus. Several rows of seats are installed along the front-to-back direction on the passenger compartment floor. A luggage compartment is located under the passenger compartment floor; therefore, the floor in the seating area is relatively high, while the chassis is relatively low. Steps are typically provided at the passenger doors to facilitate passenger boarding and alighting. The driver's cab floor is relatively low to ensure visibility. The passenger compartment floor is the entire floor covering the interior of the passenger compartment, including the seating area, aisle, and the steps at the passenger doors.

[0060] In this embodiment, the bus's passenger compartment ventilation structure includes two ventilation structures: a step area ventilation structure 10 and a front area ventilation structure 20. The step area ventilation structure 10 is located in the step area of ​​the middle door, and the front area ventilation structure 20 is located in the area near the driver's cab at the front of the passenger compartment. Each ventilation structure includes a floor for the corresponding area, an exhaust structure installed on the floor of that area, and a corresponding exhaust module. Each ventilation structure can be used for ventilation of the passenger compartment.

[0061] Combination Figure 2 , Figure 3 The ventilation structure 10 for the passenger compartment in the step area is described below. The ventilation structure 10 includes a passenger door step 11, a step area exhaust structure 12, and a step area exhaust module 13. The passenger door step 11 is the step corresponding to the middle door; this step is part of the vehicle body and also part of the passenger compartment floor. Luggage compartments are located on both sides of the passenger door step 11. The front of the passenger door step 11 is for passenger walkways, the back is connected to the space under the floor, the upper end connects to the floor of the seating area, and the lower end is close to the ground. The space under the floor at the passenger door step 11 is the vehicle floor space. The step area exhaust structure 12 is the exhaust structure installed on the floor at this location. Installing the exhaust structure on the passenger door step 11 keeps the exhaust structure away from the passenger area, reducing the impact of airflow on passengers during exhaust.

[0062] The passenger door step 11 has multiple steps, and the step area exhaust structure 12 is located on the middle step. The step has a horizontal surface and a vertical surface that forms an angle with the horizontal surface. The step area exhaust structure 12 is located on the vertical surface of the step. The horizontal surface of the step is for passengers to step on, and the vertical surface of the step is generally perpendicular to the horizontal surface or forms a small angle. Placing the step area exhaust structure 12 on the vertical surface of the step can reduce the entry of debris into the exhaust structure and save space. In other embodiments, the step area exhaust structure can also be placed on the horizontal surface of the step.

[0063] The venting structure 12 for the step area is located at the top of the step facade. The top of the step facade has a vertical surface perpendicular to the horizontal plane. The venting structure 12 is located on the vertical surface to facilitate ventilation and is also away from the horizontal plane below to reduce the entry of debris. In other embodiments, the venting structure can also be located near the horizontal plane below the step facade.

[0064] The front side of the passenger door step 11 is on the left-right side of the vehicle body, and the space on this side is part of the interior space of the passenger compartment. The step surface of the passenger door step 11 has through-vents running from left to right, connecting to both sides of the floor where the step surface is located, forming the exhaust vents for the passenger door step 11. A shielding component is provided on the floor where the step surface is located to cover the exhaust vents. The shielding component has a filter structure for air passage, allowing for a large exhaust vent area, which is beneficial for exhaust. Simultaneously, the filter structure of the shielding component prevents debris from entering. The structure is simple and easy to install. In other embodiments, several small holes can be directly opened in the floor, with all small holes forming an exhaust vent; in this case, the shielding component is not required.

[0065] In this embodiment, the shielding component is an exhaust grille, which is installed at the exhaust port and covers the entire opening area of ​​the exhaust port. The exhaust grille has an air intake facade facing the interior space of the vehicle compartment, and a filter structure is set on the air intake facade. The filter structure is formed by rows of elongated holes arranged in the exhaust grille. The exhaust grille is vertically arranged, and its side facing the interior space of the vehicle compartment constitutes the air intake facade, allowing its elongated holes to face horizontally into the interior of the vehicle compartment to facilitate airflow and simplify the installation structure of the shielding component. In other embodiments, a cover with a downward opening can also be provided at the exhaust port. The cover covers the exhaust port, and air from inside the vehicle compartment is discharged from the exhaust port through the inner cavity of the cover via the downward opening of the cover.

[0066] The step area exhaust module 13 is the exhaust module of this exhaust structure. It is installed in the space beneath the floor, which includes the space below the entire floor, encompassing the luggage compartment, the chassis space, and the space directly outside the vehicle. Air enters the exhaust module through the exhaust vent, allowing the exhaust module 13 to directly expel stale air from the passenger compartment into the outside atmosphere. The step area exhaust module 13 is installed on the back of the floor portion where the steps meet, saving space and facilitating installation. In other embodiments, if space permits, the exhaust module can also be installed above the floor, with passenger air passing through the exhaust module before being exhausted through the exhaust vent.

[0067] The exhaust module includes an air guide housing and an exhaust fan installed inside the air guide housing. The air guide housing has a connection port for connecting to the exhaust port and a clearance port for avoiding the outlet of the exhaust fan. The air guide housing of the stair tread exhaust module 13 is shaped to conform to the back of the stair tread. The air guide housing connects to the back of the floor and forms an air guide channel with the exhaust port through its connection port. The exhaust port on the floor is larger than the outlet of the exhaust fan. The exhaust port is a rectangular hole with a large opening area along the front-to-back direction. The exhaust port is covered by the back of the floor through the air guide housing, guiding air into the air guide housing. The inner cavity of the air guide housing is connected to the inlet of the exhaust fan, while the outlet of the exhaust fan is open to the outside. When the exhaust fan is running, it can have a large exhaust efficiency.

[0068] The exhaust fan outlet of the ventilation module faces one side of the vehicle body in the left-right direction. The exhaust fan of the step area ventilation module 13 draws air horizontally from the front of the passenger door step 11 and exits horizontally from the back of the step, utilizing the space under the vehicle for exhaust and avoiding the airflow blowing directly downwards to the ground and stirring up dust. Since the step is located on the side of the vehicle body, the airflow discharged through the step area ventilation module 13 blows towards the center of the vehicle body in the left-right direction.

[0069] The exhaust structure 20 in the front section of the carriage is located on the side of the carriage away from the doors in the left and right directions. Combined with... Figure 4 The exhaust structure 20 in the front compartment is described below. This structure includes a first-row floor area 21, a front exhaust structure 22, and a front exhaust module 23. The first-row floor area 21 is the area on the passenger compartment floor used for installing the first row of seats behind the driver's cab. For buses, the space where the first row of seats behind the driver's cab is located is adjacent to the front door and is connected to the interior space of the driver's cab. Setting up an exhaust structure here is beneficial for ventilation of the driver's cab. Moreover, the front compartment exhaust structure 20 near the front and the step area exhaust structure 10 near the rear work together to improve the ventilation efficiency and the consistency of air quality between the front and rear of the vehicle. To avoid the airflow generated by the exhaust from the front compartment exhaust structure 20 affecting passenger comfort, the exhaust velocity here can be set lower, while the exhaust velocity of the exhaust structure at the middle door step can be higher. In other embodiments, depending on the situation, only the step area exhaust structure or only the front compartment exhaust structure can be set. Of course, more exhaust structures can be set, and appropriate locations can be selected according to the space.

[0070] The exhaust structure 22 in the front area is the exhaust structure installed on the floor at this location. The exhaust structure 22 in the front area is located on the floor where it connects with the side panel of the vehicle body. The exhaust outlet of the exhaust structure 22 in the front area is close to the side panel and does not affect the main activity area of ​​the passengers. In other embodiments, the exhaust structure can also be installed on the floor directly under the seat.

[0071] The first row of floor area 21 is horizontally positioned. The exhaust outlet of the exhaust structure 22 in the front area is a through hole running vertically. The first row of floor area 21 is equipped with a shield to cover this exhaust outlet; this shield is a shield cover 221, which has a filter structure for air to pass through. A heating radiator 24 is located on the side panel of the vehicle body, corresponding to the first row of floor area 21. The heating radiator 24 is positioned at a certain height above the floor and is fixed to the side panel. Figure 4 The right side of the central heating radiator 24 is its fixed installation side panel. The exhaust port of the exhaust structure 22 in the front area is located below the heating radiator 24. The shield 221 is installed between the heating radiator 24 and the floor. It is designed to conform to the outer shell of the heating radiator 24 and does not protrude inward from the heating radiator 24. While covering the exhaust port, it forms an air intake facade facing the interior space of the vehicle. The filter structure is set on the air intake facade to help prevent debris from entering.

[0072] The air shield 221 has front and rear side walls and an inner side wall facing the central area of ​​the carriage. The front and rear side walls and the inner side wall are used to form an air intake facade. The side walls are provided with grille holes to form a filter structure. Air from inside the carriage enters the interior of the air shield 221 through the grille holes, and then is discharged through the corresponding exhaust port via the exhaust module. The exhaust module's fan performs active exhaust, improving exhaust efficiency.

[0073] The front exhaust module 23 is installed below the first row of the floor area 21. The exhaust fan of the front exhaust module 23 is a front exhaust fan 231, which is installed inside the air guide housing of the front exhaust module 23. This air guide housing has a connection port for connecting to the exhaust port on the corresponding floor and a clearance port to avoid the outlet of the front exhaust fan 231. Air from inside the vehicle enters the air guide housing through the exhaust port and is then exhausted outside the air guide housing by the front exhaust fan 231. The front exhaust module 23 is located under the vehicle, and the outlet of the front exhaust fan 231 faces one side of the vehicle body in the left-right direction, blowing air away from its adjacent side panel. Because it is close to the side of the vehicle body, it exhausts air towards the center of the left-right direction under the vehicle body. In other embodiments, the outlet of the exhaust fan can also be configured to face downwards, directly exhausting air downwards.

[0074] Regarding the location of the exhaust vent, in other embodiments, it can be located directly beneath the seat, with the vent facing upwards, and a horizontally arranged grille at the vent to block debris. For the ventilation module, in other embodiments, it may not be required, and natural exhaust can be achieved using the pressure difference between the inside and outside of the vehicle compartment. In other embodiments, the air guide housing may not be specifically provided; the exhaust vent can be made smaller, with the exhaust fan inlet directly facing the exhaust vent to draw in air.

[0075] In this embodiment, the bus is equipped with a fresh air system, which includes an air conditioning evaporator fresh air module 50 and a cooling and heating defrosting fresh air module 60. The air conditioning evaporator fresh air module 50 is an air conditioning evaporator with integrated fresh air function, which is installed in the air conditioning duct 55 on the top of the passenger compartment. The cooling and heating defrosting fresh air module 60 is a cooling and heating defrosting device with integrated fresh air function, which is installed at the front of the bus. This system can introduce fresh air from outside into the bus, improving the air freshness inside the bus.

[0076] Combination Figure 1 and Figure 5 The air conditioning evaporator fresh air module 50 includes a housing and a filter element 51, an evaporator body 52, and an evaporator fan 53 installed inside the housing. The air conditioning evaporator fresh air module 50 is installed in an air conditioning duct 55, which is located at the junction of the roof and the side panel. Air conditioning ducts 55 are located at the left and right corners of the roof of the vehicle. Each air conditioning duct 55 contains two air conditioning evaporator fresh air modules 50, one in front and one behind. The housing of the air conditioning evaporator fresh air module 50 has an air inlet channel. The filter element 51 and the evaporator body 52 are located on the air inlet path of the air inlet channel. A fresh air duct 54 is located on the side panel of the vehicle body, forming the air conditioning duct 55. The fresh air duct 54 extends outward to the outside of the vehicle and connects inward to the air inlet channel of the air conditioning evaporator fresh air module 50. The fresh air duct 54 can be opened and closed by corresponding dampers. When the evaporator fan 53 is operating, air enters the air inlet duct of the air conditioning evaporator fresh air module 50, passes through the filter element 51 and the evaporator body 52 in sequence, undergoes heat exchange in the evaporator body 52, and is blown out from the evaporator fan 53 into the air conditioning duct 55, and then delivered into the passenger compartment from the air outlet on the bottom plate of the air conditioning duct 55. The air in the passenger compartment can return to the air inlet duct of the air conditioning evaporator fresh air module 50 through the return air duct. At the same time, using the fresh air duct 54, fresh outside air can enter the passenger compartment through the air conditioning evaporator fresh air module 50, improving air quality.

[0077] The vehicle is equipped with a carbon dioxide sensor 40 that can detect carbon dioxide concentration. The exhaust fan, the air conditioning evaporator fresh air module 50, and the defrosting fresh air module 60 are all controlled by a controller. The controller controls the fresh air system and exhaust system to exchange air according to the carbon dioxide concentration in the vehicle, which can keep the air in the vehicle fresh and create a fresh and comfortable riding experience.

[0078] An embodiment of the bus body of this utility model:

[0079] The bus body in this embodiment has the same body structure as the bus in the above-described embodiments, and will not be described again here.

[0080] An embodiment of the passenger car ventilation structure of this utility model:

[0081] The passenger compartment ventilation structure in this embodiment is the same as that in the above-described passenger compartment ventilation structure, and will not be described again here.

[0082] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. The body of a passenger bus, characterized by: The system includes a carriage, and the floor of the carriage is equipped with an exhaust structure. The exhaust structure has an exhaust port that connects the interior space of the carriage with the space under the floor of the carriage so that the air inside the carriage can be exhausted to the outside of the carriage. The floor is equipped with a shielding member that blocks the exhaust port. The shielding member is equipped with a filter structure that allows air to pass through. The shielding member has an air intake facade facing the interior space of the carriage, and the filter structure is set on the air intake facade.

2. The bus body according to claim 1, characterized in that, The floor includes a passenger door step, on which the aforementioned exhaust structure is provided.

3. The bus body according to claim 2, characterized in that, The passenger door step has a horizontal plane and a step elevation that forms an angle with the horizontal plane. The exhaust structure installed on the passenger door step is a step area exhaust structure, which is located on the step elevation.

4. The bus body according to claim 3, characterized in that, The ventilation structure for the step area is located at the top of the step facade.

5. The bus body according to claim 1, characterized in that, The floor includes a first row area for mounting the first row of seats, and the first row area is provided with the exhaust structure.

6. The bus body according to claim 5, characterized in that, The exhaust system in the first row area is the front exhaust system, which is located on the floor where it meets the side panel of the vehicle body.

7. The ventilation structure of a passenger car compartment is characterized by: The vehicle body includes the bus body as described in any one of claims 1-6 and an exhaust module disposed at the exhaust structure of the vehicle body. The exhaust module includes an exhaust fan for drawing air from the passenger compartment to the floor below in conjunction with the exhaust port.

8. The passenger compartment ventilation structure according to claim 7, characterized in that, The ventilation module is installed in the space beneath the floor.

9. The passenger compartment ventilation structure according to claim 8, characterized in that, The exhaust fan outlet faces one side of the vehicle body.

10. The passenger compartment ventilation structure according to claim 8, characterized in that, The exhaust module includes an air guide housing, an exhaust fan is installed inside the air guide housing, and the air guide housing has a connection port for connecting to the exhaust port and a clearance port for avoiding the outlet of the exhaust fan.

11. A passenger bus, characterized by: The passenger compartment ventilation structure includes any one of claims 7-10 above.

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