Novel heat dissipation device for micro-excavation

Abstract

A novel heat dissipation device of a micro-excavator comprises an engine and a heat dissipation device, an air inlet is formed in one side of the engine, the heat dissipation device is arranged on one side of the air inlet of the engine, external dry and cold air is driven by a fan of the engine to pass through the heat dissipation device and then enters the engine, and a common heat dissipation device is usually provided with the fan and the heat dissipation device. Due to the fact that the two structures are arranged, large space is occupied, the engine fan is innovatively used as power of airflow, a radiator fan is removed, the space occupied by the radiator fan is saved, the requirement for miniaturization of the miniature excavator is better met, meanwhile, fan power does not need to be arranged, energy is saved, and the cost is reduced. And heat of power of the fan is not generated, so that heat dissipation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of micro excavators, and more specifically to a novel heat dissipation device for micro excavators. Background Art

[0002] The cooling system of a hydraulic excavator usually consists of an engine water jacket, a water pump, a water radiator, a fan, a hydraulic oil radiator and a cooling air duct. The water pump drives the heat transfer medium water to circulate forcibly. At the water radiator, the fan draws air in, and the air flows through the radiator surface, taking away the heat.

[0003] This common cooling system occupies a relatively large space due to the presence of a radiator and a fan. The fan, in particular, requires not only blades but also a drive device. The drive device also generates heat during operation, which is not conducive to heat dissipation. Summary of the Invention

[0004] In order to solve the above problems and overcome the shortcomings of the prior art, the utility model provides a novel heat dissipation device for a micro excavator.

[0005] To achieve the above-mentioned purpose, the utility model provides a new type of heat dissipation device for micro-excavation, including an engine and a radiator. An air inlet is provided on one side of the engine, and the radiator is arranged on the side of the air inlet of the engine. The external dry and cold air is driven by the engine fan and enters the engine after passing through the radiator.

[0006] Furthermore, the radiator includes a liquid inlet cavity and a liquid return cavity, a plurality of fins are provided between the liquid inlet cavity and the liquid return cavity, a liquid through pipe is provided inside the fin, and the liquid inlet cavity and the liquid return cavity are connected by the liquid through pipe.

[0007] Furthermore, a liquid inlet is provided on the liquid inlet cavity, the liquid inlet is communicated with the liquid inlet cavity, and the liquid inlet is communicated with a coolant pipeline of the excavator.

[0008] Furthermore, a liquid return port is provided on the liquid return cavity, the liquid return port is communicated with the liquid return cavity, and the liquid return port is communicated with the excavator coolant pipeline.

[0009] Furthermore, gaps are provided between adjacent fins for dry and cold air to pass through.

[0010] Furthermore, the arrangement direction of the fins is the same as the flow direction of the dry cold airflow.

[0011] Furthermore, a mounting plate is provided on the side of the radiator, and mounting holes for bolts to pass through are provided on the mounting plate, and the radiator is mounted on the housing of the micro-excavator through the bolts.

[0012] Furthermore, the liquid inlet cavity is located above the liquid return cavity.

[0013] The beneficial effects of the utility model are:

[0014] Common radiators are usually equipped with a fan and a radiator. Since there are two structures, they occupy a large space. In this application, the engine fan is innovatively used as the power of the airflow, thereby removing the radiator fan, saving the space occupied by the radiator fan, and being more conducive to the miniaturization of micro excavators. At the same time, there is no need to set up fan power, which not only saves energy, but also does not generate heat from the fan power itself, which is more conducive to heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attachment Figure 1 It is a structural diagram of the utility model;

[0016] Attachment Figure 2 This is the structural diagram of the radiator of the utility model

[0017] The accompanying drawings are numerals as follows:

[0018] 1. Radiator, 2. Engine, 3. Mounting plate, 4. Mounting hole, 5. Fin, 6. Liquid inlet, 7. Liquid return port, 8. Liquid inlet cavity, 9. Liquid return cavity. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clear, the following will be combined with the appendix of the present invention. Figure 1 and attached Figure 2 , the utility model is described in more detail.

[0020] The utility model provides a novel heat dissipation device of micro excavation, comprising an engine 2 and a radiator 1, an air inlet is provided on one side of the engine 2, and the radiator 1 is provided on the side of the air inlet of the engine 2. The dry and cold air outside enters the engine 2 after passing through the radiator 1 under the drive of the fan of the engine 2; the radiator 1 comprises a liquid inlet chamber 8 and a liquid return chamber 9, a plurality of fins 5 are provided between the liquid inlet chamber 8 and the liquid return chamber 9, a liquid through pipe is provided inside the fin 5, and the liquid inlet chamber 8 and the liquid return chamber 9 are connected by the liquid through pipe; a liquid inlet 6 is provided on the liquid inlet chamber 8, and the liquid inlet The port 6 is connected to the liquid inlet chamber 8, and the liquid inlet 6 is connected to the excavator coolant pipeline; a return liquid port 7 is provided on the return liquid chamber 9, and the return liquid port 7 is connected to the return liquid chamber 9, and the return liquid port 7 is connected to the excavator coolant pipeline; gaps for dry cold air to pass through are provided between adjacent fins 5; the arrangement direction of the fins 5 is the same as the flow direction of the dry cold airflow; a mounting plate 3 is provided on the side of the radiator 1, and a mounting hole 4 for the bolt to pass through is provided on the mounting plate 3, and the radiator 1 is mounted on the casing of the micro-excavator by bolts; the liquid inlet chamber 8 is located above the return liquid chamber 9.

[0021] Example 1 is as follows:

[0022] The new heat dissipation device of the mini excavator includes an engine 2 and a radiator 1. An air inlet is provided on one side of the engine 2, and an engine 2 fan is integrated inside the engine 2 assembly to meet the heat dissipation needs of the engine 2 itself. External dry and cold air will enter the engine 2 from the outside through the air inlet, take away the heat and then be discharged from the other side.

[0023] A common radiator 1 is usually provided with a fan and a radiator 1. Since there are two structures, a large space is occupied. In this application, the fan of the engine 2 is innovatively used as the power of the airflow, thereby removing the fan of the radiator 1, saving the space occupied by the fan of the radiator 1, and being more conducive to the miniaturization demand of the micro excavator. At the same time, there is no need to set fan power, which not only saves energy, but also does not generate heat from the fan power itself, and is more conducive to heat dissipation.

[0024] The radiator 1 is arranged on the side of the air inlet of the engine 2. Driven by the fan of the engine 2, the external dry and cold air passes through the radiator 1 and enters the engine 2. The external dry and cold air will take away the heat of the radiator 1 and then enter the engine 2. Since the heat emitted by the engine 2 is very large, even if the dry and cold air will increase its temperature after passing through the radiator 1, the increase in temperature has a negligible impact on the heat generated by the engine 2. The experimental results during the development process also show that the radiator 1 has no substantial effect on the heat dissipation of the engine 2.

[0025] The radiator 1 includes a liquid inlet chamber 8 and a liquid return chamber 9. A liquid inlet 6 is provided on the liquid inlet chamber 8, which is communicated with the liquid inlet chamber 8, and the liquid inlet 6 is communicated with the excavator coolant pipeline. A liquid return port 7 is provided on the liquid return chamber 9, which is communicated with the liquid return chamber 9, and the liquid return port 7 is communicated with the excavator coolant pipeline. The liquid inlet chamber 8 is located above the liquid return chamber 9. Under the action of gravity, it is ensured that the coolant will not flow back. A number of fins 5 are provided between the liquid inlet chamber 8 and the liquid return chamber 9. A liquid through pipe is provided inside the fin 5. The liquid inlet chamber 8 and the liquid return chamber 9 are communicated by the liquid through pipe. The coolant enters the liquid inlet chamber 8 from the liquid inlet 6, then flows through the liquid through pipe of the fin 5 into the liquid return chamber 9, and then re-enters the excavator coolant pipeline through the liquid return port 7, forming a complete heat dissipation system.

[0026] There are gaps between adjacent fins 5 for dry and cold air to pass through. When the high-temperature coolant flows through the liquid pipe, the metal fins 5 will be heated up. The dry and cold air passes through the gaps and exchanges heat with the fins 5, thereby heating up the dry and cold air and cooling the metal fins 5. At the same time, the coolant inside the fins is cooled down, completing the heat dissipation process.

[0027] The arrangement direction of the fins 5 is the same as the flow direction of the dry cold airflow, which ensures the maximum air flow without affecting the heat dissipation of the engine 2.

[0028] The mini excavator includes a casing, a mounting plate 3 is provided on the side of the radiator 1, and a mounting hole 4 for the bolts to pass through is provided on the mounting plate 3. The radiator 1 is mounted on the casing of the mini excavator by bolts. The bolt installation facilitates disassembly, replacement and maintenance.

[0029] The radiator 1 does not contact the engine 2 and will not interfere with the engine 2. At the same time, the liquid inlet 6 and the liquid return port 7 are both arranged on the back of the radiator 1 away from the engine 2, and will not interfere with the engine 2 when connecting the coolant pipeline.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel heat dissipation device for a micro excavator, comprising an engine and a radiator, characterized in that: An air inlet is provided on one side of the engine, and the radiator is provided on one side of the air inlet of the engine. Driven by the engine fan, external dry and cold air passes through the radiator and enters the engine; the radiator includes a liquid inlet chamber and a liquid return chamber, and a plurality of fins are provided between the liquid inlet chamber and the liquid return chamber. A liquid passage is provided inside the fin, and the liquid inlet chamber and the liquid return chamber are connected by the liquid passage; gaps for dry and cold air to pass through are provided between adjacent fins; the arrangement direction of the fins is the same as the flow direction of the dry and cold airflow.

2. The novel heat dissipation device for micro excavation according to claim 1 is characterized in that: The liquid inlet cavity is provided with a liquid inlet, the liquid inlet is communicated with the liquid inlet cavity, and the liquid inlet is communicated with the excavator coolant pipeline.

3. The novel heat dissipation device for micro excavation according to claim 1 is characterized in that: The liquid return cavity is provided with a liquid return port, the liquid return port is communicated with the liquid return cavity, and the liquid return port is communicated with the excavator coolant pipeline.

4. The novel heat dissipation device for micro excavation according to claim 1 is characterized in that: A mounting plate is provided on the side of the radiator, and mounting holes for bolts to pass through are provided on the mounting plate. The radiator is mounted on the housing of the micro-excavator through the bolts.

5. The novel heat dissipation device for micro excavation according to claim 1 is characterized in that: The liquid inlet cavity is located above the liquid return cavity.

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