Cooler for small excavator

Abstract

The utility model discloses a cooler for small excavator, including temperature insulation bush, temperature insulation bush inner chamber fixedly arranged with cooling cylinder, and cooling cylinder is vertical cylinder structure, the inside of cooling cylinder spiral ring around has cooling coil along its height direction, temperature insulation bush outside still is provided with the oil pump loop component for the hydraulic oil import cooling coil and backflow circulation, the inside of cooling cylinder is centrally arranged with refrigeration box, refrigeration box upper end sealed fixed in cooling cylinder and temperature insulation bush top, through oil pump loop component and circulate backflow of the hydraulic oil in oil storage tank suction to cooling coil in cooling coil and, in this process, under the cooperation of refrigeration box, semiconductor refrigeration piece and small fan etc. to the cooling liquid in cooling cylinder carries out the guide cooling and cooling, and carries out the cooling and cooling of cooling coil and hydraulic oil in the pipe through the mode of heat exchange, can effectively promote the cooling and heat exchange efficiency of hydraulic oil through this mode.

Description

Technical Field

[0001] This utility model relates to the technical field of excavator accessories, specifically a cooler for a small excavator. Background Technology

[0002] Currently, coolers for mini excavators are mainly divided into two types: air-cooled and water-cooled. Air-cooled coolers are more popular for smaller equipment because they do not require a coolant circulation system, while water-cooled coolant circulation systems are used depending on the specific situation. Existing coolers for mini excavators are mainly used for cooling hydraulic oil or the engine. When the hydraulic system is working, the oil generates a lot of heat due to energy loss. A continuous increase in temperature will accelerate oil oxidation, reduce viscosity, and shorten service life. Most mini excavators on the market currently use natural cooling (such as with heat sink fins) or air cooling to cool the hydraulic oil. However, in actual operation, high-temperature environments are sometimes encountered, leading to insufficient heat dissipation efficiency. In addition, abnormal internal structures of the cooler (such as blocked heat sink fins or unreasonable cross-installation design of cooling water pipes and oil guide pipes) will also directly affect heat exchange efficiency, causing the oil temperature to continue to rise or be difficult to effectively reduce.

[0003] In summary, there is a need for a dedicated cooler device that has a relatively simple structure, high reliability, and can effectively cool hydraulic oil. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] Therefore, the purpose of this utility model is to provide a cooler for mini excavators to solve the problems mentioned in the background art. Currently, most mini excavators on the market mainly use natural cooling (such as with heat sink fins) or air cooling to cool the hydraulic oil. Sometimes, they encounter high-temperature environments, resulting in insufficient heat dissipation efficiency. In addition, abnormal internal structures of the cooler can also directly affect the heat exchange efficiency, causing the oil temperature to rise continuously or the temperature to be difficult to drop effectively.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cooler for a mini excavator, comprising a heat insulation bushing, a cooling cylinder fixedly disposed within the inner cavity of the heat insulation bushing, the cooling cylinder being a vertical cylindrical structure, a cooling coil spirally wound around the inner side of the cooling cylinder along its height direction, an oil pump circulation assembly for guiding hydraulic oil into the cooling coil and circulating it back on the outer side of the heat insulation bushing, a refrigeration box vertically disposed in the center of the cooling cylinder, the upper end of the refrigeration box being sealed and fixed to the top of the cooling cylinder and the heat insulation bushing, and a plurality of semiconductor refrigeration chips disposed on the side wall of the refrigeration box, with the refrigeration surface of the semiconductor refrigeration chips facing the inner cavity of the cooling cylinder and the heat dissipation surface corresponding to the inner cavity of the refrigeration box; The cooling cylinder is filled with a liquid cooling medium.

[0007] As a preferred embodiment of the cooler for mini excavators described in this utility model, the heat insulation bushing and the cooling cylinder are made of heat insulation material, and a vacuum heat insulation cavity is provided between the inner side of the heat insulation bushing and the outer side of the cooling cylinder.

[0008] As a preferred embodiment of the cooler for a small excavator according to the present invention, the oil pump circulation assembly includes an oil inlet pipe fixedly connected to the input end of the cooling coil, an oil outlet pipe fixedly connected to the output end of the cooling coil, and an oil pump installed on the oil outlet pipe.

[0009] As a preferred embodiment of the cooler for mini excavators described in this utility model, the top of the cooling box has an end cover and a mounting port opened on the end cover, a small fan is matched and installed inside the mounting port, and the top of the cooling box also has a wiring hole.

[0010] As a preferred embodiment of the cooler for a small excavator described in this utility model, a heat-conducting plate that is in contact with the cooling surface of the semiconductor refrigeration chip is sealed and fixed on the outside of the refrigeration box.

[0011] As a preferred embodiment of the cooler for a small excavator described in this utility model, a temperature measuring conduit is fixedly connected to one side of the top of the cooling cylinder, and the top of the temperature measuring conduit is fixedly connected to the top of the insulation bushing. A temperature sensor with a probe extending to the inside of the temperature measuring conduit is also provided at the upper end of the insulation bushing.

[0012] As a preferred embodiment of the cooler for a small excavator according to the present invention, a water injection pipe is fixedly connected to one side of the top of the cooling cylinder and passes through the outer wall of the heat insulation bushing, and a drain pipe is fixedly connected to one side of the bottom of the cooling cylinder and passes through the outer wall of the heat insulation bushing. The outer ends of the water injection pipe and the drain pipe are also equipped with sealing caps.

[0013] As a preferred embodiment of the cooler for a small excavator described in this utility model, the bottom of the heat insulation bushing is also fixed with a positioning base, and the positioning base has multiple mounting holes arranged radially around its edge.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the cooler for mini excavators has the characteristics of simple structure and reliable stability. When it is necessary to cool the hydraulic oil that exceeds the temperature rise limit, the hydraulic oil in the oil tank is drawn into the cooling coil in the cooling cylinder and circulated back through the oil pump circulation component. During this process, the coolant in the cooling cylinder is cooled by the cooperation of the cooling box, semiconductor cooling chip and small fan, and the cooling coil and the hydraulic oil in the tube are cooled by heat exchange. In this way, the cooling and heat exchange efficiency of the hydraulic oil can be effectively improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall external structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the device of this utility model; Figure 3 This is a schematic diagram of the cooling box structure of this utility model; Figure 4 This is a demonstration diagram of the hydraulic oil inlet and outlet of this utility model.

[0016] In the diagram: 100, thermal insulation bushing; 200, cooling cylinder; 210, cooling coil; 220, temperature measuring conduit; 230, water injection pipe; 240, drain pipe; 300, oil pump circulation assembly; 310, oil inlet pipe; 320, oil outlet pipe; 330, oil pump; 400, cooling box; 410, semiconductor cooling chip; 420, small fan; 430, mounting port; 440, heat conduction plate; 500, temperature sensor; 600, positioning base; 610, mounting hole. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0020] Figures 1-4 The diagram shown is a complete structural schematic of the cooler for a mini excavator according to this utility model. Please refer to [link / reference]. Figures 1-4 The cooler for a small excavator according to this embodiment includes a heat insulation bushing 100. A cooling cylinder 200 is fixedly installed inside the heat insulation bushing 100. The cooling cylinder 200 is a vertical cylindrical structure. A cooling coil 210 is spirally wound around the inner side of the cooling cylinder 200 along its height direction. An oil pump circulation assembly 300 for introducing hydraulic oil into the cooling coil 210 and circulating it back is also provided on the outer side of the heat insulation bushing 100. A refrigeration box 400 is vertically placed in the center of the cooling cylinder 200. The upper end of the refrigeration box 400 is sealed and fixed to the top of the cooling cylinder 200 and the heat insulation bushing 100. A plurality of semiconductor refrigeration chips 410 are also provided on the side wall of the refrigeration box 400. At the same time, the refrigeration surface of the semiconductor refrigeration chip 410 faces the inner cavity of the cooling cylinder 200 and the heat dissipation surface corresponds to the inner cavity of the refrigeration box 400. The inner cavity of the cooling cylinder 200 is filled with a liquid refrigerant.

[0021] The thermal insulation bushing 100 and the cooling cylinder 200 are made of heat-insulating material, and a vacuum insulation cavity is provided between the inner side of the thermal insulation bushing 100 and the outer side of the cooling cylinder 200. Through the cooperation of the thermal insulation bushing 100 and the vacuum insulation cavity, the transfer of external high temperatures to the interior of the cooling cylinder 200 can be prevented and reduced, ensuring that the cooling cylinder 200 can operate continuously in a relatively low-temperature and low-power environment. The oil pump circulation assembly 300 includes an oil inlet pipe 310 fixedly connected to the input end of the cooling coil 210, an oil outlet pipe 320 fixedly connected to the output end of the cooling coil 210, and an oil pump 330 mounted on the oil outlet pipe 320. The speed and power of the oil pump 330 are adjustable and can be adjusted according to actual conditions. The top of the cooling box 400 has an end cover and a mounting port 430 opened on the end cover. A small fan 420 is fitted inside the mounting port 430, and the top of the cooling box 400 also has a wiring hole. The wiring holes facilitate the routing of cables for the thermoelectric cooler 410 and the small fan 420. The small fan 420 accelerates the removal of heat from the thermoelectric cooler 410, further improving its efficiency. A heat-conducting plate 440, which is in contact with the cooling surface of the thermoelectric cooler 410, is sealed and fixed to the outside of the cooling box 400. The heat-conducting plate 440 prevents the cooler from directly contacting the coolant and also serves as a heat exchanger. Specifically, in use, when cooling hydraulic oil exceeding the temperature rise limit is required, the oil pump circulation assembly 300 draws hydraulic oil from the reservoir into the cooling coil 210 within the cooling cylinder 200 and circulates it back. During this process, the cooling box 400, the thermoelectric cooler 410, and the small fan 420 work together to conduct and cool the coolant in the cooling cylinder 200, and the cooling coil 210 and the hydraulic oil within it are cooled through heat exchange.

[0022] Furthermore, a temperature measuring conduit 220 is fixedly connected to one side of the top of the cooling cylinder 200, and the top of the temperature measuring conduit 220 is fixedly connected to the top of the insulation bushing 100. A temperature sensor 500 with a probe extending to the inside of the temperature measuring conduit 220 is also provided at the upper end of the insulation bushing 100. It can be understood that a temperature controller is also externally connected to the temperature sensor 500. In actual use, this device is controlled by an external controller and a central control terminal device to realize the operation of the device. The temperature sensing unit monitors the temperature of the coolant in the cooling cylinder 200 in real time, and the control unit adjusts the output power of the cooling element and the start and stop operation of related components based on the temperature feedback. In addition, it should be noted that since the excavator is in a state of continuous shaking during operation, the hydraulic oil in the cooling cylinder 200 is also in a state of shaking and mixing, so there is no need to worry about blind spots or inaccuracies in temperature monitoring.

[0023] Furthermore, a water injection pipe 230 is fixedly connected to one side of the top of the cooling cylinder 200, passing through the outer wall of the thermal insulation bushing 100, and a drain pipe 240 is fixedly connected to one side of the bottom of the cooling cylinder 200, passing through the outer wall of the thermal insulation bushing 100. The outer ends of the water injection pipe 230 and the drain pipe 240 are also equipped with sealing caps. With the cooperation of the water injection pipe 230, the drain pipe 240, and the sealing caps, the coolant inside the cooling cylinder 200 can be easily injected and discharged.

[0024] Furthermore, a positioning base 600 is fixed to the bottom of the insulation bushing 100, and multiple mounting holes 610 are formed radially around the edge of the positioning base 600. With the cooperation of the positioning base 600, the mounting holes 610, and locking components such as bolts, the cooler device can be easily fixed and installed on the machine frame.

[0025] In summary, the cooler for mini excavators of this embodiment, when used to cool hydraulic oil that exceeds the temperature rise limit, draws hydraulic oil from the reservoir into the cooling coil 210 within the cooling cylinder 200 via the oil pump circulation component 300 and circulates it back. During this process, the coolant in the cooling cylinder 200 is cooled by the cooperation of the cooling box 400, the semiconductor cooling chip 410, and the small fan 420, and the cooling coil 210 and the hydraulic oil inside are cooled by heat exchange. This method can effectively improve the cooling and heat exchange efficiency of the hydraulic oil.

[0026] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cooler for a mini excavator, characterized in that, The device includes a heat insulation bushing (100), a cooling cylinder (200) fixedly installed inside the heat insulation bushing (100), the cooling cylinder (200) is a vertical cylindrical structure, a cooling coil (210) is spirally wrapped around the inner side of the cooling cylinder (200) along its height direction, and an oil pump circulation assembly (300) for introducing hydraulic oil into the cooling coil (210) and circulating it back is also provided on the outer side of the heat insulation bushing (100). A refrigeration box (400) is vertically placed in the center inside the cooling cylinder (200), and the upper end of the refrigeration box (400) is sealed and fixed to the top of the cooling cylinder (200) and the heat insulation bushing (100). A plurality of semiconductor refrigeration chips (410) are also provided on the side wall of the refrigeration box (400), and the refrigeration surface of the semiconductor refrigeration chip (410) faces the inner cavity of the cooling cylinder (200) and the heat dissipation surface corresponds to the inner cavity of the refrigeration box (400). The inner cavity of the cooling cylinder (200) is filled with liquid cooling medium.

2. The cooler for a mini excavator according to claim 1, characterized in that: The heat insulation bushing (100) and the cooling cylinder (200) are made of heat insulation material, and there is a vacuum heat insulation cavity between the inner side of the heat insulation bushing (100) and the outer side of the cooling cylinder (200).

3. The cooler for a mini excavator according to claim 1, characterized in that: The oil pump circulation assembly (300) includes an oil inlet pipe (310) with one end fixedly connected to the input end of the cooling coil (210), an oil outlet pipe (320) fixedly connected to the output end of the cooling coil (210), and an oil pump (330) installed on the oil outlet pipe (320).

4. The cooler for a mini excavator according to claim 1, characterized in that: The top of the refrigeration box (400) has an end cover and a mounting port (430) opened on the end cover. A small fan (420) is matched and installed inside the mounting port (430). The top of the refrigeration box (400) also has a wiring hole.

5. The cooler for a mini excavator according to claim 1, characterized in that: The outside of the refrigeration box (400) is sealed with a heat-conducting plate (440) that is in contact with the refrigeration surface of the semiconductor refrigeration chip (410).

6. The cooler for a mini excavator according to claim 1, characterized in that: The top side of the cooling cylinder (200) is fixedly connected to a temperature measuring tube (220), and the top of the temperature measuring tube (220) is fixedly connected to the top of the insulation bushing (100). The upper end of the insulation bushing (100) is also provided with a temperature sensor (500) whose probe extends to the inside of the temperature measuring tube (220).

7. The cooler for a mini excavator according to claim 1, characterized in that: The top side of the cooling cylinder (200) is fixedly connected to a water injection pipe (230) that passes through the outer wall of the insulation bushing (100), and the bottom side of the cooling cylinder (200) is fixedly connected to a drain pipe (240) that passes through the outer wall of the insulation bushing (100). The outer ends of the water injection pipe (230) and the drain pipe (240) are also equipped with sealing caps.

8. The cooler for a mini excavator according to claim 1, characterized in that: The bottom of the thermal insulation bushing (100) is also fixed with a positioning base (600), and the positioning base (600) has multiple mounting holes (610) in a radial circle around its edge.

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