Vacuum pump

Abstract

The utility model discloses a vacuum pump which comprises a machine shell, an installation cavity and a heat dissipation cavity arranged at the rear end of the installation cavity in an extending mode. The oil tank shell is arranged in the heat dissipation cavity; and the heat dissipation channel penetrates through the mounting cavity and the heat dissipation cavity, heat dissipation air can flow into the heat dissipation cavity from the mounting cavity through the heat dissipation channel, and the heat dissipation channel is used for air cooling heat dissipation of a pump body immersed in the oil tank shell. The vacuum pump has the advantages that the communicated heat dissipation cavity is additionally arranged, the oil tank shell is internally provided with the heat dissipation cavity, heat dissipation air enters the heat dissipation cavity and then achieves air cooling heat dissipation on the pump body, and meanwhile the oil tank shell is wrapped so that the vacuum pump can be prevented from scalding a user after operation is finished; and secondly, the vacuum pump is inclined by a certain angle through the arranged supporting piece, so that the vacuum pump is stably placed on a table top or the ground to slowly wait for old oil discharge.

Description

Technical Field

[0001] This utility model relates to the technical field of vacuum pumps, and in particular to a vacuum pump with air-cooled heat dissipation and a support-type oil change mechanism. Background Technology

[0002] Existing rotary vane vacuum pumps generate a large amount of heat during operation. The internal fan can only dissipate heat from the motor through air cooling, while the pump body relies on the vacuum pump oil to transfer heat to the oil tank, and then radiates heat from the oil tank. This cooling method has limited effectiveness in cooling the pump body and may lead to excessively high pump body temperature, affecting the performance of the vacuum pump. Therefore, there is a lack of effective means to reduce the pump body temperature, which has a significant impact on vacuum level. At the same time, after a period of use, the vacuum pump oil needs to be replaced with new oil. However, during the process of draining the old oil, because the oil tank wall is covered with vacuum pump oil, it is necessary to wait for it to flow slowly. Holding the vacuum pump is time-consuming and laborious, which is not only inconvenient to operate, but also easily causes oil to drip. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a vacuum pump with air-cooled heat dissipation and a support-type oil change mechanism.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a vacuum pump, comprising: a housing, including a mounting cavity and a heat dissipation cavity extending to the rear end of the mounting cavity; an oil tank housing, disposed within the heat dissipation cavity; and a heat dissipation channel, penetrating the mounting cavity and the heat dissipation cavity, through which cooling air can flow from the mounting cavity to the heat dissipation cavity, for air cooling of the pump body immersed in the oil tank housing.

[0005] Preferably, a motor is provided inside the mounting cavity, and an air guide plate is provided in front of the motor.

[0006] Preferably, the outer surface of the fuel tank shell is provided with heat dissipation fins.

[0007] Preferably, a fan is provided inside the mounting cavity and in front of the motor to generate the cooling air.

[0008] Preferably, the front end of the housing is provided with an air inlet that communicates with the mounting cavity.

[0009] Preferably, the rear end of the housing is provided with an air outlet that communicates with the heat dissipation cavity.

[0010] Preferably, the cooling air can enter through the air inlet and flow sequentially to the mounting cavity and the cooling cavity before being discharged through the air outlet.

[0011] Preferably, a support member is included, which is inserted into the bottom hole of the housing, for tilting and supporting the vacuum pump, after which the oil in the oil tank is discharged from the drain port.

[0012] Preferably, the support member is L-shaped, consisting of a horizontal bar and a vertical bar; the vertical bar is inserted into the bottom hole, and the horizontal bar abuts against the tabletop or the ground.

[0013] Preferably, the side of the housing is provided with a vertical hole and a horizontal groove; the support member is stored by inserting the vertical rod into the vertical hole and the horizontal rod into the horizontal groove.

[0014] The beneficial effects of this utility model are as follows: First, by adding a connected heat dissipation cavity, the oil tank shell is built into the heat dissipation cavity, so that the heat dissipation air enters the heat dissipation cavity and achieves air cooling of the pump body. At the same time, the covering of the oil tank shell can also prevent the user from being burned after the vacuum pump finishes running. Second, by setting the support, the vacuum pump is tilted at a certain angle, so that it can be placed stably on the table or the ground to slowly wait for the old oil to be discharged. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the vacuum pump described in this utility model;

[0016] Figure 2 This is a schematic diagram of the heat dissipation air duct in the vacuum pump of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the vacuum pump described in this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the support member inserted into the bottom hole in the vacuum pump of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the vacuum pump of this utility model, which is tilted and supported by a support member to discharge oil.

[0020] Figure 6 This is a schematic diagram of the structure for housing the support component in the vacuum pump described in this utility model. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0022] Example 1

[0023] Reference Figure 1-3As illustrated, this embodiment proposes an air-cooled vacuum pump to achieve air cooling of the pump body 21 and improve its heat dissipation efficiency. A cooling channel is provided in the housing 1, and the rearward extension of the housing 1 can enclose or partially enclose the oil tank shell 2, guiding the airflow from the fan 5 to the surface of the oil tank shell 2 for forced air cooling. The pump body 21 is immersed in the oil tank shell 2 by the vacuum pump oil 3. Through air cooling of the oil tank shell 2, the pump body 21 can achieve air cooling. Simultaneously, enclosing or partially enclosing the oil tank shell 2 also prevents the user from being burned after the vacuum pump has finished operating.

[0024] Specifically, the overall structure of the vacuum pump includes a housing 1 and an oil tank 2. The housing 1 has a mounting cavity 11 and a heat dissipation duct 12. The heat dissipation duct 12 is connected to the rear end of the mounting cavity 11 and is formed by the inner wall of the rearward extension of the housing 1 and the outer surface of the oil tank 2. The rearward extension of the housing 1 can completely or partially enclose the oil tank 2. The pump body 21 is immersed in the oil in the oil tank 2. Cooling air can flow from the mounting cavity 11 to the heat dissipation duct 12 to cool the oil tank 2 and the pump body 21.

[0025] Furthermore, the mounting cavity 11 forms a receiving cavity for the housing 1. The mounting cavity 11 is equipped with a motor 4, a fan 5, and a bracket. In the mounting cavity 11, the motor 4 and the bracket, together with the inner wall of the housing 1, also form the original air duct. In this embodiment, by extending the housing 1 rearward, the inner wall of the rearward extension of the housing 1 forms a heat dissipation air duct 12 with the outer side of the fuel tank shell 2, thus extending the original air duct of the mounting cavity 11, which is the heat dissipation air duct 12. Therefore, the heat dissipation air from the original air duct is blown out by the heat dissipation air duct 12 to cool the outer surface of the fuel tank shell 2.

[0026] As one aspect of this embodiment, to prevent the airflow from the fan 5 from impacting the motor 4 and dissipating in all directions, an annular air guide plate 13 is provided around the fan 5. In this embodiment, the air guide plate 13 extends inward from the inner wall of the housing 1, and is located in front of the motor 4 to guide the airflow towards the heat dissipation duct 12. The fan 5 is provided in front of the motor 4 to generate forced cooling airflow.

[0027] As one aspect of this embodiment, the front and rear ends of the housing 1 are provided with an air inlet 14 and an air outlet 15. The front end of the housing 1 is provided with an air inlet 14 and the rear end is provided with an air outlet 15. The cooling air enters from the air inlet 14, flows into the mounting cavity 11, passes through the original air duct to the cooling air duct 12, and is discharged from the air outlet 15, forming a complete air-cooling cycle.

[0028] Refer again Figure 1It should be noted that the air outlet 15 provided in this embodiment is a solution in which the rearward extension of the housing 1 fully covers the fuel tank housing 2. When the rearward extension of the housing 1 partially covers the outer surface of the fuel tank housing 2, the air outlet 15 can be the outlet of the heat dissipation duct 12 itself.

[0029] As one aspect of this embodiment, heat dissipation fins 22 are provided on the outer surface of the fuel tank shell 2. When the cooling air blows to the outer surface of the fuel tank shell 2, it flows through the heat dissipation fins 22 to increase the heat dissipation area and improve the heat dissipation efficiency.

[0030] The heat dissipation process in this embodiment is as follows: Motor 4 drives fan 5 to rotate, generating cooling airflow. The airflow enters the mounting cavity 11 from the air inlet 14, is guided by the air guide plate 13, and flows to the cooling duct 12. The cooling air enters the cooling duct 12, directly blowing on the outer surface of the oil tank shell 2, and the cooling effect is enhanced by the cooling fins 22, thereby reducing the temperature of the pump body 21. Finally, the hot air is discharged from the outlet or air outlet 15 of the cooling duct 12, completing the heat dissipation cycle.

[0031] Example 2

[0032] Reference Figure 4-6 As illustrated, to simplify the oil draining operation of the vacuum pump, this embodiment includes an oil draining support structure. An L-shaped support member 6 is inserted into a small hole at the bottom of the vacuum pump housing 1 to support the vacuum pump at a certain angle, allowing it to be stably placed on a table or floor while the old oil is slowly drained. When not draining oil, the support member 6 can be inserted into a small hole on the side of the housing 1 for storage.

[0033] Specifically, the support member 6 can be inserted into the bottom hole 16 of the housing 1 to tilt and support the vacuum pump, so that the oil in the oil tank 2 can be smoothly discharged from the oil drain port 23.

[0034] As one embodiment, the support member 6 has an L-shaped structure, including a horizontal bar 61 and a vertical bar 62. The vertical bar 62 is inserted into the bottom hole 16, and the horizontal bar 61 abuts against the ground or tabletop, forming a stable support. The storage structure has a vertical hole 17 and a horizontal groove 18 on the side of the casing 1. The support member 6 can be stored by inserting the vertical bar 62 into the vertical hole 17 and the horizontal bar 61 into the horizontal groove 18, thus preventing loss.

[0035] The oil draining process in this embodiment is as follows: When it is necessary to replace the vacuum pump oil 3, insert the vertical rod 62 of the support member 6 into the bottom hole 16, and the horizontal rod 61 abuts against the support surface, causing the vacuum pump to tilt at a certain angle. The oil in the oil tank 2 flows to the drain port 23 under the action of gravity, and due to the increased tilt angle, the oil flow speed is accelerated, reducing the waiting time. After draining the oil, pull out the support member 6 and store it in the vertical hole 17 and the horizontal groove 18, keeping the overall structure neat.

[0036] It is easy to understand that, for the heat dissipation structure in this application, the heat dissipation duct 12 can adopt a multi-channel diversion design to optimize airflow distribution. Meanwhile, the air guide plate 13 can be configured with an adjustable angle to adapt to different wind speed requirements. The heat dissipation fins 22 can be replaced with a finned or honeycomb heat dissipation structure to further improve heat dissipation efficiency.

[0037] For the support structure, support member 6 can be telescopic or foldable to accommodate different tilt angles. Multiple bottom holes 16 can be designed to provide different support height options. Support member 6 can be made of metal or high-strength plastic to enhance durability.

[0038] It should be noted that the heat dissipation structure and support structure of this application are structural components for the heat dissipation and oil drainage operation of the vacuum pump body. The realization of the basic functions of the vacuum pump itself are all existing and very mature technologies. For example, how the vacuum pump itself achieves vacuuming, the layout of the internal motor and circuit board, the layout of internal components and sensors, and the related electronic control, etc. The above are just examples of technical issues. Of course, there should also be other technical issues that are the same or similar to the above, all of which are existing and very mature technologies. The technical features corresponding to the technical problems to be solved are also non-essential technical features of this application. When judging whether this application is fully disclosed, it should not deviate from the core meaning. Therefore, it will not be described in detail.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit the scope of protection of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description and ideas. It is neither necessary nor possible to exhaustively describe all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the technical solution of this utility model should be covered within the scope of protection of the claims of this utility model.

Claims

1. A vacuum pump, characterized in that: include, The housing (1) includes a mounting cavity (11) and a heat dissipation duct (12) connected to the rear end of the mounting cavity (11); The oil tank housing (2) and the pump body (21) are submerged in the oil tank housing (2); The heat dissipation duct (12) is formed by the inner wall of the rearward extension of the housing (1) and the outer side of the oil tank housing (2). The heat dissipation air in the mounting cavity (11) can flow from the heat dissipation duct (12) to the oil tank housing (2) for the air cooling of the pump body (21).

2. The vacuum pump according to claim 1, characterized in that: The inner wall of the housing (1) is provided with an air guide plate (13) extending inward, and the air guide plate (13) is located in front of the motor (4).

3. The vacuum pump according to claim 1, characterized in that: The outer surface of the oil tank shell (2) is provided with heat dissipation fins (22).

4. The vacuum pump according to claim 2, characterized in that: A fan (5) is provided inside the mounting cavity (11) to generate the cooling air.

5. The vacuum pump according to claim 1, characterized in that: The front end of the housing (1) is provided with an air inlet (14) that communicates with the mounting cavity (11).

6. The vacuum pump according to claim 5, characterized in that: The rear end of the housing (1) is provided with an air outlet (15) that communicates with the heat dissipation duct (12).

7. The vacuum pump according to claim 6, characterized in that: The cooling air can enter through the air inlet (14) and flow sequentially to the mounting cavity (11) and the cooling air duct (12), and then be discharged through the air outlet (15).

8. The vacuum pump according to claim 1, characterized in that: The oil tank (2) includes a support member (6) inserted into the bottom hole (16) of the housing (1) for tilting and supporting the vacuum pump, after which the oil in the oil tank (2) is discharged from the oil drain port (23).

9. The vacuum pump according to claim 8, characterized in that: The support member (6) is an L-shaped structure consisting of a horizontal bar (61) and a vertical bar (62); The vertical rod (62) is inserted into the bottom hole (16), and the horizontal rod (61) abuts against the table or the ground.

10. The vacuum pump according to claim 9, characterized in that: The side of the housing (1) is provided with a vertical hole (17) and a horizontal groove (18); The support member (6) is inserted into the vertical hole (17) through the vertical rod (62) and the horizontal rod (61) is embedded in the horizontal groove (18) to complete the storage.

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