Heat dissipation device and harvester

Abstract

The utility model discloses a heat dissipation device and a harvester, comprising a composite cooling device which is respectively connected with an air outlet and an air inlet of an engine and is used for cooling high-temperature air which is output from the air outlet of the engine after being supercharged by an engine supercharger and inputting the cooled air into the engine through the air inlet of the engine; the cooling device is connected with a water outlet and a water inlet of the engine and used for leading out cooling liquid in the engine to be cooled and enabling the cooled cooling liquid to flow back to the engine through the water inlet of the engine. The cooling fan is arranged on one side of the composite cooling device and comprises fan blades, and an angle adjusting structure is arranged at the end of each fan blade; and the reversing mechanism is used for driving the fan blades to reverse through the angle adjusting structure when the reversing mechanism is externally driven or the temperature of the composite cooling device is higher than a preset value.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a heat dissipation device. In addition, the utility model also relates to a harvester comprising the heat dissipation device. Background Art

[0002] In modern agricultural machinery, the engine, as the core power output source, has a performance directly linked to the functionality and efficiency of the entire vehicle. The engine's cooling system is particularly crucial, having a significant impact on its performance. The efficient operation of the cooling system ensures that the engine maintains a stable temperature during continuous operation, thereby preventing performance degradation or damage caused by overheating and ensuring the overall operational stability and reliability of agricultural machinery. The cooling system primarily consists of a cooling fan, fan connection flange, composite cooler, radiator shroud, water pipes, and air pipes. Common cooling fans include conventional cooling fans and hydraulic reversing fans. Conventional cooling fans and hydraulic reversing fans are mostly directly connected to the engine, with the same direction and speed as the engine. Conventional cooling fans have fixed blade pitch and cannot be adjusted, while hydraulic reversing fans can control a hydraulic valve to adjust the fan blade pitch.

[0003] Ordinary cooling fans have unadjustable blade angles and a single gas flow direction. Crop straw, branches, and dust can easily clog the radiator shroud and core, affecting the engine's cooling efficiency and requiring frequent, difficult cleaning. Hydraulic reversing fans can adjust their angles, change the gas flow direction, and use the fan to backflush and clean impurities from the shroud and radiator core. However, the current method for controlling backflush is a manual physical switch that cannot be adjusted in real time based on the actual status of the engine and radiator. Multiple useless reversals can also damage the fan's internal components and shorten its service life. Furthermore, the engine needs to slow down to achieve backflush, which not only affects engine performance but also affects harvesting efficiency. Utility Model Content

[0004] The utility model provides a heat dissipation device and a harvester, which solve the technical problems of a simple adjustment and control mode of a reversing fan of a heat dissipation system of an existing agricultural machinery engine and poor use effect.

[0005] According to one aspect of the present invention, a heat dissipation device is provided, which is applied to an engine and includes:

[0006] The composite cooling device is connected to the air outlet and air inlet of the engine, respectively, for cooling the high-temperature gas output from the air outlet of the engine after being pressurized by the engine supercharger and for inputting the cooled gas into the engine through the engine air inlet; and is connected to the water outlet and water inlet of the engine, respectively, for drawing out the coolant in the engine for cooling and for returning the cooled coolant to the engine through the water inlet of the engine;

[0007] A heat dissipation fan is provided on one side of the composite cooling device and includes fan blades, the ends of which are provided with angle adjustment structures;

[0008] The reversing mechanism is used to be driven by an external device or to drive the fan blades to reverse direction via the angle adjustment structure when the temperature of the composite cooling device is higher than a preset value.

[0009] As a further improvement of the above technical solution, the composite cooling device includes a radiator core, and the radiator core includes an intercooler heat dissipation module, a hydraulic oil heat dissipation module and a water-cooler heat dissipation module.

[0010] As a further improvement of the above technical solution, the composite cooling device includes an expansion water tank, and the water inlet of the engine is connected to the water outlet of the expansion water tank via a water supply pipe.

[0011] As a further improvement of the above technical solution, the composite cooling device has a degassing port connected to the expansion water tank via a first degassing pipe, and the degassing port of the engine is connected to the expansion water tank via a second degassing pipe.

[0012] As a further improvement of the above technical solution, the reversing mechanism includes a reversing valve and a controller, and the controller or the reversing valve is connected to a reversing switch for controlling the action of the reversing valve.

[0013] As a further improvement of the above technical solution, the reversing mechanism includes a temperature sensor arranged in the composite cooling device and electrically connected to the controller, and the controller is used to control the action of the reversing valve when the temperature feedback from the temperature sensor reaches a preset value.

[0014] As a further improvement of the above technical solution, the controller is provided with a timing switch for controlling the action time and action interval of the reversing valve.

[0015] As a further improvement of the above technical solution, the cooling fan is provided with a reset unit for driving the fan blades to reset to the forward blowing angle after the fan blades are at the reverse blowing angle and the reversing mechanism stops working.

[0016] As a further improvement of the above technical solution, the composite cooling device includes a wind shield arranged outside the radiator core on the side facing the cooling fan, the distance between the tip of the fan blade and the wind shield is 15-20mm, and the distance between the tip of the fan blade and the wind shield is >80mm.

[0017] According to another aspect of the present invention, a harvester is also provided, which includes the above-mentioned heat dissipation device.

[0018] The utility model has the following beneficial effects:

[0019] The high-temperature gas after the engine supercharger is pressurized enters the composite cooling device through the intercooler intake pipe for cooling, and the cooled gas is input into the engine through the intercooler outlet pipe to provide the engine with gas of suitable temperature; the engine is in a high-temperature state when working. If the air circulation heat dissipation cannot meet the demand, the water circulation heat dissipation is further turned on, and the coolant flows out of the engine through the water outlet pipe into the composite cooling device for cooling. After cooling, it flows back to the engine through the water inlet pipe and the engine; the high-temperature gas and liquid are cooled in the composite cooling device, and the cooling fan is used to carry away a large amount of heat energy generated by the composite cooling device, and the blade setting angle of the cooling fan is adjustable. The fan is rotated and rotated to move the fan blades, and the fan is rotated to move the fan blades, and the fan is rotated to move the fan blades, and the fan is rotated to move the fan blades. The ...

[0020] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the preferred embodiment of the utility model Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the preferred embodiment of the utility model Figure 2 ;

[0024] Figure 3 It is a schematic structural diagram of a heat dissipation fan according to a preferred embodiment of the present invention.

[0025] Legend:

[0026] 1. Engine; 2. Intercooler air intake pipe; 3. First protective cover; 4. Water outlet pipe; 5. Second degassing pipe; 6. First degassing pipe; 7. Expansion tank; 8. Water supply pipe; 9. Shock absorber pad; 10. Water inlet pipe; 11. Reversing valve; 12. Wind shield; 13. Connecting flange; 14. Intercooler air outlet pipe; 15. Cooling fan; 151. Fan blades; 152. Angle adjustment structure; 16. Radiator core; 17. Second protective cover. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0028] Figure 1 This is a schematic diagram of the structure of the preferred embodiment of the utility model Figure 1 ; Figure 2 This is a schematic diagram of the structure of the preferred embodiment of the utility model Figure 2 ; Figure 3 It is a schematic structural diagram of a heat dissipation fan according to a preferred embodiment of the present invention.

[0029] like Figures 1 to 3 As shown, the heat dissipation device of this embodiment is applied to the engine 1 and includes:

[0030] The composite cooling device is connected to the air outlet and air inlet of the engine 1 respectively, and is used to cool the high-temperature gas output from the air outlet of the engine 1 after being supercharged by the supercharger of the engine 1 and to input the cooled gas into the engine 1 through the air inlet of the engine 1; it is connected to the water outlet and water inlet of the engine 1 respectively, and is used to draw out the coolant in the engine 1 for cooling and return the cooled coolant to the engine 1 through the water inlet of the engine 1;

[0031] The cooling fan 15 is provided on one side of the composite cooling device and includes a fan blade 151. The end of the fan blade 151 is provided with an angle adjustment structure 152. The cooling fan 15 is connected to the engine 1 through the connecting flange 13.

[0032] The reversing mechanism is used to drive the fan blades 151 to reverse direction via the angle adjustment structure 152 when driven by an external device or when the temperature of the composite cooling device is higher than a preset value.

[0033] The composite cooling device includes a radiator core 16, which includes an intercooler heat dissipation module, a hydraulic oil heat dissipation module, and a water-cooler heat dissipation module. A first protective cover 3 is provided outside the cooling fan 15, and a second protective cover 17 is provided on the side of the composite cooling device away from the cooling fan 15. The second protective cover 17 is a corrugated mesh plate, which not only ensures the required air volume of the fan, but also prevents branches, leaves, and debris from entering the heat dissipation layer of the radiator core 16 of the composite cooling device. On the other hand, an elastic shock-absorbing pad 9 is provided at the bottom of the composite cooling device to reduce the impact of vibration and protect the device. The air outlet of the engine 1 is connected to the air inlet of the composite cooling device through the intercooler intake pipe 2.

[0034] It can be understood that the high-temperature gas after the supercharger of the engine 1 enters the composite cooling device through the intercooler intake pipe 2 for cooling, and the cooled gas is input into the engine 1 through the intercooler outlet pipe 14 to provide the engine 1 with gas of suitable temperature; the engine 1 is in a high-temperature state when working. If the air circulation heat dissipation cannot meet the demand, the water circulation heat dissipation is further turned on, and the coolant flows out of the engine 1 through the water outlet pipe 4 into the composite cooling device for cooling, and after cooling, it flows back to the engine 1 through the water inlet pipe 10 from the water inlet of the engine 1; the high-temperature gas and liquid are cooled in the composite cooling device, and the cooling fan 15 is operated to take away a large amount of heat energy generated by the composite cooling device, and the fan blades of the cooling fan 15 151 is provided with an angle adjustment mechanism and is controlled by a reversing mechanism. During operation, if straw, branches, dust, etc. are found to cause blockage, the reversing mechanism can actively control the fan blades 151 to reverse and backblow to clean impurities and avoid blockage. On the other hand, the heat exchange mechanism detects the working temperature of the composite cooling device. If the temperature is higher than the preset value, it indicates that the air intake volume is reduced, the air inlet is blocked, and the heat dissipation demand cannot be met. At this time, the reversing mechanism works to control the fan blades 151 to reverse and backblow to clean impurities. Compared with the existing heat dissipation device, this device has a reasonable layout and high heat dissipation efficiency. The cooling fan 15 works more intelligently and can realize the backblow function according to different working conditions, reduce the number of fan backblows, and increase the service life.

[0035] In this embodiment, the composite cooling device includes an expansion water tank 7. The water inlet of the engine 1 is connected to the water outlet of the expansion water tank 7 via a water supply pipe 8. When the temperature of the engine 1 increases, the volume of the liquid increases due to thermal expansion and contraction. When the temperature of the engine 1 decreases, the volume of the liquid decreases due to thermal contraction. The expansion water tank 7 is provided to maintain a constant hydraulic pressure in the system.

[0036] Furthermore, the composite cooling device has a degassing port, which is connected to the expansion water tank 7 via a first degassing pipe 6, and the degassing port of the engine 1 is connected to the expansion water tank 7 via a second degassing pipe 5; the first degassing pipe 6 is used to discharge the air in the system during the coolant filling process, and the second degassing pipe 5 is used to discharge excess air in the cooling device. The two work together to ensure the normal operation of the engine 1 cooling system and the stable operation of the engine 1.

[0037] In this embodiment, the cooling fan 15 is provided with a reset unit, which can be a spring arranged on the angle adjustment structure 152, and is used to drive the fan blades 151 to reset to the forward blowing angle after the fan blades 151 are at the reverse blowing angle and the reversing mechanism stops working. That is, when reverse blowing is required, the reversing mechanism is activated to drive the fan blades 151 to adjust the angle. After the reverse blowing is completed, the reversing work stops working, and the fan blades 151 are reset under the action of the reset unit.

[0038] In this embodiment, the reversing mechanism includes a reversing valve 11 and a controller. The reversing valve 11 is connected to the angle adjustment structure 152 via an oil pipe 153. The controller or the reversing valve 11 is connected to a reversing switch for controlling the movement of the reversing valve 11. The reversing switch is used to manually and physically control the movement of the reversing valve 11 and thus control the reversing of the fan blades 151.

[0039] Furthermore, the reversing mechanism includes a temperature sensor provided in the composite cooling device and electrically connected to the controller. The controller is used to control the reversing valve 11 to operate when the temperature feedback from the temperature sensor reaches a preset value. Specifically, it can be provided in the water-cooling heat dissipation module. For example, when the monitored water temperature reaches 90°C, the mesh of the protective cover is blocked, the air intake volume is reduced, and the controller controls the reversing valve 11 to operate and reverse.

[0040] In this embodiment, the controller is provided with a timing switch for controlling the action time and action interval of the reversing valve 11, wherein the timing switch is turned on when the engine 1 reaches the operating speed, so that the reversing mechanism acts for a preset time after a preset time interval, for example, reversing for 10 seconds at an interval of 8 minutes; on the other hand, if the temperature sensor monitors that the water temperature reaches 90°C, the backflush time, that is, the opening time of the reversing mechanism, is reset to ensure that the temperature drops to a safe value.

[0041] It should be noted that the controller, temperature sensor, timer switch and other electronic components and their connection relationships in this embodiment are all implemented based on existing technologies and will not be elaborated on in detail.

[0042] In this embodiment, the composite cooling device includes a wind shield 12 arranged outside the radiator core 16 on the side facing the cooling fan 15. The distance between the tip of the fan blade 151 and the wind shield 12 is 15-20 mm, and the distance between the tip of the fan blade 151 and the wind shield 12 is greater than 80 mm to prevent air loss.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A heat dissipation device, applied to an engine (1), characterized in that: include: The composite cooling device is respectively connected to the air outlet and the air inlet of the engine (1), and is used to cool the high-temperature gas output from the air outlet of the engine (1) after being pressurized by the supercharger of the engine (1), and to input the cooled gas into the engine (1) through the air inlet of the engine (1); and is respectively connected to the water outlet and the water inlet of the engine (1), and is used to draw out the coolant in the engine (1) for cooling and cooling, and to allow the cooled coolant to flow back into the engine (1) through the water inlet of the engine (1); A heat dissipation fan (15) is provided on one side of the composite cooling device and includes a fan blade (151), wherein an angle adjustment structure (152) is provided at an end of the fan blade (151); The reversing mechanism is used for driving the fan blades (151) to reverse direction via the angle adjustment structure (152) when driven externally or when the temperature of the composite cooling device is higher than a preset value.

2. The heat dissipation device according to claim 1, characterized in that: The composite cooling device comprises a radiator core (16), and the radiator core (16) comprises an intercooling heat dissipation module, a hydraulic oil heat dissipation module, and a water-cooling heat dissipation module.

3. The heat dissipation device according to claim 1, wherein: The composite cooling device comprises an expansion water tank (7), and the water inlet of the engine (1) is connected to the water outlet of the expansion water tank (7) via a water supply pipe (8).

4. The heat dissipation device according to claim 3, characterized in that: The composite cooling device has a degassing port connected to an expansion water tank (7) via a first degassing pipe (6); the degassing port of the engine (1) is connected to the expansion water tank (7) via a second degassing pipe (5).

5. The heat dissipation device according to claim 1, characterized in that: The reversing mechanism comprises a reversing valve (11) and a controller, wherein the controller or the reversing valve (11) is connected to a reversing switch for controlling the action of the reversing valve (11).

6. The heat dissipation device according to claim 5, characterized in that: The reversing mechanism comprises a temperature sensor provided in the composite cooling device and electrically connected to the controller, and the controller is used to control the action of the reversing valve (11) when the temperature fed back by the temperature sensor reaches a preset value.

7. The heat dissipation device according to claim 6, characterized in that: The controller is provided with a timing switch for controlling the action time and action interval of the reversing valve (11).

8. The heat dissipation device according to claim 1, wherein: The heat dissipation fan (15) is provided with a reset unit for driving the fan blade (151) to reset to a forward blowing angle after the fan blade (151) is at a reverse blowing angle and the reversing mechanism stops working.

9. The heat dissipation device according to claim 2, characterized in that: The composite cooling device comprises a wind shield (12) arranged outside the radiator core (16) on one side facing the cooling fan (15), the distance between the blade tip of the fan blade (151) and the wind shield (12) is 15-20 mm, and the distance between the blade tip of the fan blade (151) and the wind shield (12) is greater than 80 mm.

10. A harvester, characterized in that: The heat dissipation device according to any one of claims 1 to 9 is used.

Images