An air conditioning system for a fuel-powered double-decker open-top bus

Abstract

This utility model discloses an air conditioning system for a fuel-powered double-decker open-top bus, including an air conditioning unit installed at the rear of the vehicle. The air conditioning unit is connected to evaporators. The evaporators include a first evaporator, a second evaporator, a third evaporator, and a fourth evaporator installed at the middle left side of the first-floor passenger compartment, the left front of the driver's cabin, the right front, and the rear of the second-floor passenger compartment. Each of the four evaporators is equipped with an independent refrigerant circulation loop and connected to the air conditioning unit and air ducts. Air outlet components are provided on the air ducts. The air conditioning unit, evaporators, and air outlet components are respectively connected to a control cabinet, which is installed on one side of the air conditioning unit. This device reduces cooling loss and energy consumption by configuring independent refrigerant circulation loops in the upper and lower passenger compartments, using a four-evaporator parallel structure in the upper and lower compartments, and integrating a condenser waste heat recovery module. This solves the problems of high energy consumption, difficulty in zoned temperature control, and large heat load fluctuations in traditional open-top bus air conditioning systems.

Description

Technical Field

[0001] This utility model belongs to the technical field of bus air conditioning equipment, specifically relating to an air conditioning system for a fuel-powered double-decker open-top bus. Background Technology

[0002] Buses are generally equipped with air conditioning systems to blow air at a comfortable temperature into the passenger compartment. These systems are typically installed on the roof of the bus and deliver air downwards into the passenger compartment through main air ducts located on the roof.

[0003] Traditional double-decker open-top buses suffer from large fluctuations in interior heat load due to their open-top structure, requiring frequent start-stop of the air conditioning system, resulting in significantly increased fuel consumption and high overall vehicle energy consumption. Furthermore, the large temperature difference between the upper and lower cabins and the open-top area makes it difficult to balance comfort with a single-path air supply, leading to uneven temperature control. In addition, changes in external temperature and humidity (such as direct sunlight or rain) can cause the air conditioning system to respond slowly, resulting in poor adaptability to the environment. Utility Model Content

[0004] The purpose of this invention is to provide an air conditioning system for a fuel-powered double-decker open-top bus, which solves the problems of high energy consumption, difficulty in zoned temperature control, and large fluctuations in heat load in traditional open-top bus air conditioning systems.

[0005] The technical solution adopted by this utility model is an air conditioning system for a fuel-powered double-decker open-top bus, including an air conditioning unit installed at the rear of the vehicle. The air conditioning unit is connected to an evaporator. The evaporator includes a first evaporator, a second evaporator, a third evaporator, and a fourth evaporator installed at the middle left side of the first-floor passenger cabin, the left front driver's cabin, the right front side, and the rear of the second-floor passenger cabin. Each of the four evaporators is equipped with an independent refrigerant circulation loop and is connected to the air conditioning unit and the air duct. An air outlet assembly is provided on the air duct. The air conditioning unit, the evaporator, and the air outlet assembly are respectively connected to a control cabinet, which is installed on one side of the air conditioning unit.

[0006] Furthermore, the aforementioned air duct includes an upper air duct, a middle air duct, and a lower air duct. The upper air duct is distributed along the roof crossbeam, the middle air duct surrounds the bottom of the seats, and the lower air duct is located in the floor interlayer.

[0007] Furthermore, the aforementioned fourth evaporator includes an evaporator body, with two airflow output pipes connected to the airflow output end of the evaporator body. The two airflow output pipes are respectively connected to the upper air duct, which is arranged along the crossbeams on both sides of the rear roof of the second floor of the bus.

[0008] Furthermore, a humidity-sensing damper is installed on the upper air duct, and the humidity-sensing damper is connected to the control cabinet.

[0009] Furthermore, the upper, middle, and lower air ducts are all equipped with air duct fan assemblies, which are electrically connected to the control cabinet.

[0010] Furthermore, the height of the upper air duct is reduced by 30% compared to the lower air duct.

[0011] Compared with existing technologies, the beneficial effects of this utility model are that it configures independent refrigerant circulation loops in the upper and lower passenger cabins, adopts a four-evaporator parallel structure in the upper and lower cabins, integrates a condenser waste heat recovery module, and sets the air duct system in three layers. The upper air duct adopts a telescopic air outlet to adapt to the open and closed state of the convertible. The air duct in the convertible area is automatically closed in rainy weather to reduce the loss of cold air. The middle air duct surrounds the bottom of the seats to achieve directional air supply to the feet. The lower air duct, together with the side wall air outlets, forms an encircling airflow to ensure balanced air supply to the cabin, uniform temperature control, and reduced energy consumption. This solves the problems of high energy consumption, difficulty in zoned temperature control, and large heat load fluctuations in traditional convertible bus air conditioning. Attached Figure Description

[0012] Figure 1 A schematic diagram of the layered layout of the air conditioning system;

[0013] Figure 2 A schematic diagram showing the layout of the evaporators in the first-floor passenger compartment of a passenger bus.

[0014] Figure 3 A schematic diagram showing the evaporator layout in the second-floor passenger cabin of a passenger bus;

[0015] Figure 4 This is a schematic diagram of the refrigerant circulation loop;

[0016] Figure 5 This is a schematic diagram of the air conditioning system circuit connection;

[0017] Figure 6 This is a schematic diagram of the fourth evaporator. Detailed Implementation

[0018] The present invention will be further explained below with reference to the accompanying drawings to enable those skilled in the art to better understand it.

[0019] Example 1

[0020] like Figure 1-6 As shown, an air conditioning system for a fuel-powered double-decker open-top bus includes an air conditioning unit 1, an air duct 2, an air duct fan assembly 3, an air outlet assembly 4, an evaporator 5, and a control cabinet 6. The air conditioning unit 1 adopts a back-mounted design and is installed in the rear chassis space of the vehicle to avoid the limitation of the roof height on the open-top structure.

[0021] Air conditioning unit 1 is connected to evaporators 5. Evaporators 5 include a first evaporator 501 installed in the middle left side of the first-floor passenger cabin, a second evaporator 502 installed in the driver's cab at the front left side of the first-floor passenger cabin, a third evaporator 503 installed in the front right side of the first-floor passenger cabin, and a fourth evaporator 504 installed at the rear of the second-floor passenger cabin. Each of the four evaporators 5 is equipped with an independent refrigerant circulation loop and is connected to air conditioning unit 1 and air duct 2. Air outlet assembly 4 is provided on air duct 2. Air conditioning unit 1, evaporators 5, and air outlet assembly 4 are respectively connected to control cabinet 6. Control cabinet 6 is installed at the rear of the bus, located on one side of air conditioning unit 1. It is used to obtain the working status of the bus air conditioning system and the status of the bus cabin, and to control the working mode of the air conditioning system according to the system setting control method. By configuring independent refrigerant circulation loops in the upper and lower passenger cabins, adopting a four-evaporator parallel structure for the upper and lower floors, integrating a condenser waste heat recovery module, and controlling the independent air supply cooling of the upper and lower floors through control cabinet 6, the system can adapt to the temperature and humidity changes of the second-floor passenger cabin to the greatest extent, reduce cooling loss, and reduce energy consumption.

[0022] The air duct 2 includes an upper air duct 201, a middle air duct 202, and a lower air duct 203. The upper air duct 201 is distributed along the roof crossbeam and adopts a retractable air outlet. The retractable air outlet is driven by a shape memory alloy and responds to the opening and closing of the convertible. The middle air duct 202 surrounds the bottom of the second-level seats to achieve directional air supply to the feet. The lower air duct 203 is set in the floor interlayer and forms an enveloping airflow with the middle air outlet assembly of the side wall. The upper air duct 201, the middle air duct 202, and the lower air duct 203 are all equipped with air duct fan assemblies 3.

[0023] The air outlet assembly 4 includes multiple top air outlet assemblies 401, multiple middle air outlet assemblies 402, and multiple bottom air outlet assemblies 403. The multiple top air outlet assemblies 401 are connected to the upper air duct 201; the multiple middle air outlet assemblies 402 are connected to the middle air duct 202; and the multiple bottom air outlet assemblies 403 are connected to the lower air duct 203.

[0024] The fourth evaporator 504 includes an evaporator body 5041. The airflow output end of the evaporator body 5041 is connected to two airflow output pipes 5042. The two airflow output pipes 4052 are respectively connected to the upper air duct 201. The upper air duct 201 is arranged along the crossbeams on both sides of the rear roof of the second floor of the bus.

[0025] To reduce cooling loss, a humidity-sensing damper 7 is installed on the upper air duct 201. The humidity-sensing damper 7 is electrically connected to the control cabinet 6 and automatically closes the air duct in the open area during rainy weather. Temperature sensors are installed in the roof / seat / floor areas of the bus, and a humidity sensor is installed in the roof of the bus. The temperature sensors and humidity sensors are electrically connected to the control cabinet.

[0026] Furthermore, the height of the upper air duct is reduced by 30% compared to the lower air duct, which meets the space constraints of the convertible top folding; the air intake system of the air conditioning unit 1 adopts a double-layer flow impeller, which mixes 50% internal circulating air and 50% fresh air. The internal air is used for cabin heating after heat exchange, and the external air is used for windshield defogging.

[0027] This invention features independent refrigerant circulation loops in both the upper and lower passenger cabins, with a parallel structure of four evaporators in each cabin. It also integrates a condenser waste heat recovery module and sets up a three-layer air duct system. The upper air duct uses telescopic air outlets to adapt to the open and closed state of the convertible. It automatically closes the air ducts in the convertible area during rain to reduce cooling loss. The middle air duct surrounds the bottom of the seats to achieve directional airflow to the feet. The lower air duct, together with the side wall air outlets, forms a wraparound airflow to ensure balanced airflow into the cabin, uniform temperature control, and reduced energy consumption. This invention solves the problems of high energy consumption, difficulty in zoned temperature control, and large fluctuations in heat load in traditional convertible buses.

[0028] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from its design spirit and principles should fall within the protection scope defined by the claims of the present invention.

Claims

1. An air conditioning system for a fuel dual-deck open-top bus, characterized by, The vehicle includes an air conditioning unit (1) installed at the rear of the vehicle. The air conditioning unit (1) is connected to an evaporator (5). The evaporator (5) includes a first evaporator (501), a second evaporator (502), a third evaporator (503), and a fourth evaporator (504) installed at the middle left side of the first-floor passenger cabin, the front left side of the driver's cabin, the front right side, and the rear of the second-floor passenger cabin. Each of the four evaporators is equipped with an independent refrigerant circulation loop and is connected to the air conditioning unit (1) and the air duct (2). An air outlet assembly (4) is provided on the air duct (2). The air conditioning unit (1), the evaporator (5), and the air outlet assembly (4) are connected to a control cabinet (6). The control cabinet (6) is installed on one side of the air conditioning unit.

2. An air conditioning system for a fuel double-deck open-top bus vehicle according to claim 1, characterized in that, The air duct (2) includes an upper air duct (201), a middle air duct (202) and a lower air duct (203). The upper air duct (201) is distributed along the roof beam, the middle air duct (202) surrounds the bottom of the seat, and the lower air duct (203) is located in the floor interlayer.

3. An air conditioning system for a fuel double-deck open-top bus according to claim 2, characterized in that, The fourth evaporator (504) includes an evaporator body (5041), the airflow output end of the evaporator body (5041) is connected to two airflow output pipes (5042), the two airflow output pipes (5042) are respectively connected to the upper air duct (201), and the upper air duct (201) is arranged along the two crossbeams on both sides of the rear roof of the second floor of the bus.

4. The air conditioning system of a fuel-powered double-decker open-top bus according to claim 2, characterized in that, A humidity-sensing air valve (7) is also installed on the upper air duct (201), and the humidity-sensing air valve (7) is connected to the control cabinet (6).

5. The air conditioning system of a fuel-powered double-decker open-top bus according to claim 1, characterized in that, The upper air duct (201), middle air duct (202) and lower air duct (203) are each equipped with an air duct fan assembly (3), which is electrically connected to the control cabinet (6).

6. The air conditioning system of a fuel-powered double-decker open-top bus according to claim 1, characterized in that, The height of the upper air duct (201) is reduced by 30% compared to the lower air duct (203).

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