A tractor

Abstract

The utility model provides a tractor. Include: engine, front bracket, mechanical compressor, parking power supply, electric compressor, heat dissipation assembly, first fan, second fan, evaporimeter, air conditioner flow channel. Mechanical compressor is connected with engine transmission, electric compressor is connected with parking power supply electricity, heat dissipation assembly includes the condenser of mechanical compressor and electric compressor pipeline connection, first fan is established in heat dissipation assembly back side and guides the airflow forcedly through heat dissipation assembly, second fan is established in condenser front side and guides the airflow forcedly through condenser. The utility model discloses through the lithium iron phosphate battery as parking power supply and integrates BMS management system, gives consideration to tractor's parking electricity and whole machine starting use, adopts electric compressor and mechanical compressor to realize tractor parking condition under air conditioner refrigeration, improves tractor cab's comfort.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, and in particular to a tractor. Background Technology

[0002] Dual-mode parking air conditioning systems use two compressors: a mechanical compressor for the driving air conditioning system and an electric compressor for the parking air conditioning system. Dual-mode parking air conditioning systems offer remote controllability and provide continuous cooling when the vehicle is parked, effectively improving vehicle comfort. However, while common in trucks and RVs, dual-mode parking air conditioning systems are rarely used in agricultural machinery.

[0003] The application of dual-mode parking air conditioning systems in existing tractors faces the following technical obstacles: First, existing tractors use lead-acid batteries as their power source, which does not meet the requirements for parking air conditioning; second, integrating an electric compressor into the tractor requires a corresponding cooling system, but the limited internal space of the tractor makes it difficult to meet these integration needs. Therefore, it is necessary to provide a tractor that overcomes the aforementioned shortcomings. Utility Model Content

[0004] The purpose of this invention is to provide a tractor.

[0005] According to this utility model, a tractor is provided, with the forward direction of the tractor as the front, comprising: an engine, the engine including a crankshaft pulley; a front bracket, the front bracket being disposed on the front side of the engine; a mechanical compressor, the mechanical compressor being disposed above the engine and drivingly connected to the crankshaft pulley; a parking power supply, the parking power supply being disposed on the front bracket; an electric compressor, the electric compressor being disposed side by side above the engine and electrically connected to the parking power supply; a cooling assembly, the cooling assembly being disposed on the front bracket, the cooling assembly including a condenser, the condenser being connected to the mechanical compressor and the electric compressor via piping; a first A fan, the first fan being located at the rear of the cooling assembly and connected to the crankshaft pulley for transmission, guides airflow to forcefully pass through the cooling assembly; a second fan, the second fan being located at the front of the condenser and electrically connected to the parking power supply, guides airflow to forcefully pass through the condenser; an evaporator, the evaporator being located inside the tractor roof, the condenser being connected to one end of the evaporator via an expansion valve, and the other end of the evaporator being connected to the mechanical compressor and the electric compressor; an air conditioning duct, the air conditioning duct being equipped with a third fan, which guides the air cooled by the evaporator into the air conditioning duct.

[0006] Preferably, the system further includes a generator, which is connected to the crankshaft pulley via a drive connection and is electrically connected to the parking power supply.

[0007] Preferably, the output voltage of the parking power supply is 24V.

[0008] Preferably, the heat dissipation assembly has an inclined mounting plate on its front side, and a step-down module is provided on the mounting plate. The parking power supply is connected to the second fan and the third fan via the step-down module.

[0009] Preferably, the mounting plate is further provided with an inverter, and the parking power supply is connected to an external charging port via the inverter.

[0010] Preferably, the mounting plate and the second fan partially overlap in vertical height. The mounting plate is provided with several through holes. The buck module and inverter are located at the through holes. The second fan guides the airflow through the lower surface of the buck module and inverter and forces it through the heat dissipation assembly.

[0011] Preferably, the outlet end of the mechanical compressor is connected in series with the first check valve, the outlet end of the electric compressor is connected in series with the second check valve, and the mechanical compressor and the first check valve, the electric compressor and the second check valve are connected in parallel.

[0012] Preferably, the inlet end of the electric compressor is connected in series with a third one-way valve.

[0013] Preferably, the parking power supply is connected to a BMS power management controller, and the power management controller includes a main power switch located above the parking power supply.

[0014] Preferably, the electric compressor is signal-connected to the integrated gateway, the integrated gateway is signal-connected to the TOBX, the display and the control panel, and the TOBX is signal-connected to the personal terminal via a cloud server.

[0015] Compared with existing technologies, the tractor provided by this utility model has the following advantages: This utility model uses a lithium iron phosphate battery as the parking power source and integrates a BMS management system, taking into account both the tractor's parking power consumption and overall machine starting. It employs both an electric compressor and a mechanical compressor to achieve air conditioning cooling under parking conditions. Furthermore, users can remotely turn on the electric air conditioner and monitor the power system status while the tractor is parked via a mobile app, improving driver comfort, enhancing the human-machine interface, and enabling remote wake-up power-on. It also allows for remote OTA upgrades of components such as instruments, positioning modules, engine ECU controllers, and the overall machine controller. Attached Figure Description

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0017] Figure 1 This is a schematic diagram of the parking power supply and air conditioning system in this utility model;

[0018] Figure 2 This is a schematic diagram of the parking power supply in this utility model;

[0019] Figure 3 This is a schematic diagram of the parking power supply in this utility model;

[0020] Figure 4 This is a schematic diagram of the parking power supply in this utility model;

[0021] Figure 5 This is a schematic diagram illustrating the principle of air conditioning refrigeration in this utility model.

[0022] Explanation of reference numerals in the attached diagram: 1. Engine; 11. Crankshaft pulley; 2. Front bracket; 3. Mechanical compressor; 4. Parking power supply; 41. BMS power management controller; 411. Main power switch; 42. Step-down module; 43. Inverter; 44. External charging port; 45. External discharging port; 5. Electric compressor; 6. Cooling assembly; 61. Condenser; 62. Second fan; 63. Expansion valve; 64. Evaporator; 65. Air conditioning duct; 66. Third fan; 67. Heater; 68a. First one-way valve; 68b. Second one-way valve; 68c. Third one-way valve; 7. First fan; 8. Mounting plate; 81. Through hole; 91. Integrated gateway; 92. TOBX; 93. Display; 94. Control panel; 95. Cloud server; 96. Personal terminal. Detailed Implementation

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0025] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0026] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0029] See Figures 1 to 5 This embodiment discloses a tractor, including an engine 1, a front bracket 2, a mechanical compressor 3, a parking power supply 4, an electric compressor 5, a cooling assembly 6, a first fan 7, a second fan 62, an evaporator 64, and an air conditioning duct 65.

[0030] See appendix Figure 1 The engine 1 includes a crankshaft pulley 11, a front bracket 2 located on the front side of the engine 1 and fixedly connected to the engine 1, a mechanical compressor 3 located above the engine 1 and connected to the crankshaft pulley 11 for transmission, a parking power supply 4 located on the front bracket 2, and an electric compressor 5 located side by side above the engine 1 and electrically connected to the parking power supply 4.

[0031] The cooling assembly 6 is mounted on the front bracket 2 and is located between the parking power supply 4 and the engine 1. The cooling assembly 6 includes a condenser 61, which is located at the top of the cooling assembly 6. The condenser 61 is connected to the mechanical compressor 3 and the electric compressor 5 via pipelines. The first fan 7 is located at the rear of the cooling assembly 6 and is connected to the crankshaft pulley 11 for transmission. The first fan 7 guides the airflow to be forced through the cooling assembly 6.

[0032] The second fan 62 is located in front of the condenser 61 and is electrically connected to the parking power supply 4. The second fan 62 guides the airflow to force it through the condenser 61. The evaporator 64 is located inside the tractor roof. The condenser 61 is connected to one end of the evaporator 64 via the expansion valve 63. The other end of the evaporator 64 is connected to the mechanical compressor 3 and the electric compressor 5. A third fan 66 is provided at the air conditioning duct 65. The air cooled by the evaporator 64 is guided by the third fan 66 into the air conditioning duct 65.

[0033] When the vehicle is in motion, engine 1 drives mechanical compressor 3 and first fan 7, while parking power 4 supplies power to third fan 66. Refrigerant is compressed by mechanical compressor 3 to form high-temperature, high-pressure gas. Under the action of first fan 7, the high-temperature, high-pressure gas passes through condenser 61 to form medium-temperature, high-pressure liquid. This liquid then passes through expansion valve 63 to form a low-pressure, low-temperature gas-liquid mixture. At this point, under the action of third fan 66, the low-pressure, low-temperature gas-liquid mixture becomes low-temperature, low-pressure gas, returning to mechanical compressor 3 for continued circulation. Simultaneously, air cooled by evaporator 64 and guided by third fan 66 enters air conditioning duct 65, achieving cooling of the cab.

[0034] When the vehicle is parked, the parking power supply 4 supplies power to the electric compressor 5, the second fan 62, and the third fan 66. The refrigerant is compressed by the electric compressor 5 to form a high-temperature, high-pressure gas. Under the action of the second fan 62, the high-temperature, high-pressure gas passes through the condenser 61 to form a medium-temperature, high-pressure liquid. The medium-temperature, high-pressure liquid passes through the expansion valve 63 to form a low-pressure, low-temperature gas-liquid mixture. At this time, under the action of the third fan 66, the low-pressure, low-temperature gas-liquid mixture becomes a low-temperature, low-pressure gas and returns to the electric compressor 5 to continue the cycle. At the same time, the air cooled by the evaporator 64 and guided by the third fan 66 enters the air conditioning duct 65 to cool the cab.

[0035] In this embodiment, a heater 67 is installed in the cab, specifically located under the seat, to blow hot air towards the foot area, increasing the temperature in the lower part of the cab and improving cab comfort. Both the heater 67 and the evaporator 64 are connected to the engine 1's water tank piping, and a shut-off valve is installed on the piping. The waste heat generated by the engine 1 is used to heat the cab, improving the overall energy efficiency of the machine.

[0036] In this embodiment, the output voltage of the parking power supply 4 is 24V. Preferably, the parking power supply 4 is a 24V lithium iron phosphate battery. The parking power supply 4 is electrically connected to the generator, which is driven by the crankshaft pulley 11. When the engine 1 starts, it charges the lithium iron phosphate battery. In addition, the parking power supply 4 is also connected to an external charging port 44, allowing the user to charge the parking power supply 4 through the external charging port 44.

[0037] See appendix Figure 2A mounting plate 8 is inclined at the front of the cooling assembly 6, and a step-down module 42 is installed on the mounting plate 8. The parking power supply 4 is connected to the second fan 62 and the third fan 66 via the step-down module 42. Since the electrical components inside the existing tractor are mainly 12V, the parking power supply 4 outputs 12V after being stepped down by the step-down module 42 to power the second fan 62, the third fan 66, and other electrical components. The electric compressor 5 is directly connected to the parking power supply 4 to avoid overloading the step-down module 42 and to protect the entire power supply circuit.

[0038] The mounting plate 8 is also equipped with an inverter 43, and the parking power supply 4 is connected to the external discharge port 45 via the inverter 43. A 220V AC power supply is generated through the inverter 43 and the external discharge port 45 to provide external power, allowing users to use some household appliances such as kettles and induction cookers outdoors.

[0039] See appendix Figure 3 A mounting plate 8 is inclinedly mounted on the front side of the heat dissipation assembly 6, and the mounting plate 8 partially overlaps with the second fan 62 in vertical height. The mounting plate 8 has several through holes 81, and the buck module 42 and inverter 43 are located at the through holes 81. The second fan 62 guides airflow past the lower surfaces of the buck module 42 and inverter 43 and forces it through the heat dissipation assembly 6. The air converges on the air inlet side of the second fan 62 after passing through the upper and lower surfaces of the mounting plate 8. The second fan 62 then guides the air through the condenser 61, thereby dissipating heat from the condenser 61.

[0040] See appendix Figure 5 In this system, the outlet of the mechanical compressor 3 is connected in series with the first one-way valve 68a, and the outlet of the electric compressor 5 is connected in series with the second one-way valve 68b. The mechanical compressor 3 and the first one-way valve 68a, the electric compressor 5 and the second one-way valve 68b are connected in parallel. The electric compressor 5 and the mechanical compressor 3 share a set of piping, expansion valve 63, condenser 61, evaporator 64 and third fan 66. The switching between the electric compressor 5 and the mechanical compressor 3 is achieved through a three-way valve and a one-way valve to realize air conditioning cooling. The electric compressor 5 and the mechanical compressor 3 cannot work simultaneously.

[0041] The electric compressor 5 is generally a rotary type. When the electric compressor 5 stops, its lubricating oil and refrigerant are drawn away by the working mechanical compressor 3. The mechanical compressor 3 is generally a piston type. When the mechanical compressor 3 stops, its suction port valve is closed, so it is not drawn into the working electric compressor 5. Therefore, the inlet end of the electric compressor 5 is connected in series with the third one-way valve 68c.

[0042] See appendix Figure 4The parking power supply 4 is connected to the BMS power management controller 41. The BMS power management controller 41 includes a main power switch 411 located above the parking power supply 4, which monitors the status of the parking power supply 4 and takes into account both parking power consumption and overall machine startup.

[0043] The electric compressor 5 is connected to the integrated gateway 91, which in turn is connected to the TOBX 92, display 93, and control panel 94. The TOBX 92 is connected to the personal terminal 96 via the cloud server 95. Users can remotely turn on the electric air conditioner and monitor the power system status while the vehicle is parked via a mobile app, improving driver comfort, enhancing the human-machine interaction experience, and remotely waking up the power supply. It also enables remote OTA upgrades for components such as the instrument panel, positioning module, engine ECU controller, and overall controller.

[0044] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. A tractor, characterized in that, Taking the direction of the tractor's movement as forward, it includes: An engine, the engine including a crankshaft pulley; A front bracket, wherein the front bracket is located on the front side of the engine; A mechanical compressor, which is located above the engine and is connected to the crankshaft pulley via a drive mechanism; Parking power supply, wherein the parking power supply is mounted on the front bracket; An electric compressor is arranged side-by-side above the engine and electrically connected to the parking power supply. A heat dissipation assembly is mounted on the front bracket and includes a condenser connected to the pipelines of the mechanical compressor and the electric compressor. A first fan is located at the rear of the heat dissipation assembly and is connected to the crankshaft pulley for transmission. The first fan guides airflow to force it through the heat dissipation assembly. A second fan is located in front of the condenser and is electrically connected to the parking power supply. The second fan guides airflow to force it through the condenser. An evaporator is installed inside the tractor roof. The condenser is connected to one end of the evaporator via an expansion valve, and the other end of the evaporator is connected to the mechanical compressor and the electric compressor. An air conditioning duct is provided, and a third fan is provided at the air conditioning duct to guide the air cooled by the evaporator into the air conditioning duct.

2. The tractor as described in claim 1, characterized in that, It also includes a generator, which is connected to the crankshaft pulley via a drive, and the generator is electrically connected to the parking power supply.

3. The tractor as described in claim 2, characterized in that, The output voltage of the parking power supply is 24V.

4. The tractor as described in claim 3, characterized in that, The cooling assembly has a mounting plate tilted at the front, and a step-down module is provided on the mounting plate. The parking power supply is connected to the second fan and the third fan via the step-down module.

5. The tractor as described in claim 4, characterized in that, The mounting plate is also equipped with an inverter, and the parking power supply is connected to an external charging port via the inverter.

6. The tractor as described in claim 5, characterized in that, The mounting plate and the second fan partially overlap in vertical height. The mounting plate is provided with several through holes. The step-down module and the inverter are located at the through holes. The second fan guides the airflow through the lower surface of the step-down module and the inverter and forces it through the heat dissipation assembly.

7. The tractor as described in claim 6, characterized in that, The mechanical compressor outlet is connected in series with the first check valve, and the electric compressor outlet is connected in series with the second check valve. The mechanical compressor and the first check valve, the electric compressor and the second check valve are connected in parallel.

8. The tractor as described in claim 7, characterized in that, The inlet of the electric compressor is connected in series with a third one-way valve.

9. The tractor as described in claim 8, characterized in that, The parking power supply is connected to the BMS power management controller, which includes a main power switch located above the parking power supply.

10. The tractor as claimed in claim 9, characterized in that, The electric compressor is connected to the integrated gateway, which is connected to the TOBX, the display, and the control panel. The TOBX is connected to the personal terminal via a cloud server.

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