Composite filter

Abstract

The utility model provides a composite filter which comprises a suction filter, two oil outlet nozzles are arranged on a shell of the suction filter, a first one-way valve and a second one-way valve are respectively mounted at the lower end parts in the two oil outlet nozzles, and the conduction directions of the first one-way valve and the second one-way valve are consistent with the oil outlet direction of the suction filter; an oil outlet branch connecting nozzle is arranged in the middle of one oil outlet nozzle, a press filter is fixedly arranged on the oil outlet branch connecting nozzle, an oil inlet nozzle of the press filter and the oil outlet branch connecting nozzle are connected in a sleeved mode and arranged in a sealed mode, and a third one-way valve is arranged in a liquid flow path from the oil inlet nozzle to the interior of the press filter. The conduction direction of the third one-way valve is consistent with the oil inlet direction of the press filter; the press filter with the one-way valve is integrated on the suction filter, the one-way valve can prevent the press filter from flowing back, three-way flow guide can be achieved, the structure is compact, and production and assembly are convenient.

Description

Technical Field

[0001] This utility model relates to liquid filters, specifically to a composite filter. Background Technology

[0002] The current electric drive cooling and lubrication system of new energy vehicles mainly consists of hardware such as a suction filter, an electronic pump, a filter press, and an oil cooler. These components are essential for the oil-cooled electric drive system of new energy vehicles. During operation, as illustrated in CN118856202A, an offline electric drive cleanliness control method connects the suction filter, electronic pump, filter press, and oil cooler through multiple one-way valves. This allows the electronic pump to directly send the liquid from the suction filter to the oil cooler when rotating forward, and to send the liquid from the suction filter to the oil tank via the filter press when rotating in reverse, thus performing offline filtration of the oil in the tank. The system layout must be designed to be compact for this oil circuit electric drive system. Utility Model Content

[0003] In response to the needs of the prior art, this utility model provides a composite filter, the purpose of which is to make the offline electric drive cleanliness control system more compact.

[0004] A composite filter includes a suction filter with two oil outlets on its housing. A first check valve and a second check valve are respectively installed at the lower ends of the two oil outlets, and the conduction direction of the first check valve and the second check valve are consistent with the oil outlet direction of the suction filter. An oil outlet branch connector is provided in the middle of one of the oil outlets, and a filter press is fixedly installed on the oil outlet branch connector. The oil inlet of the filter press is sleeved and sealed with the oil outlet branch connector. A third check valve is provided in the liquid flow path from the oil inlet to the inside of the filter press, and the conduction direction of the third check valve is consistent with the oil inlet direction of the filter press.

[0005] Furthermore, the filter is a flat structure and includes an upper shell and a lower shell that are connected vertically. A first filter layer is fixedly disposed between the upper shell and the lower shell. A clean liquid chamber is formed between the first filter layer and the upper shell, and a mixed liquid chamber is formed between the first filter layer and the lower shell. An inlet is provided on the bottom wall of the lower shell, and two oil outlets are both vertically disposed and fixedly connected to the top wall of the upper shell.

[0006] Furthermore, the two oil outlets are located on the right side of the top surface of the upper housing, and the filter press is located on the left side of the oil outlets.

[0007] Furthermore, the filter press has a cylindrical structure and includes a cylindrical second filter layer. Sealing end caps and oil inlet end caps are respectively sealed and fixed at both ends of the second filter layer. The sealing end caps block the ports of the second filter layer. An oil inlet is provided in the middle of the oil inlet end cap. The oil inlet is connected to the inner cavity of the second filter layer. The oil inlet nozzle is located on the oil inlet end cap and covers the oil inlet.

[0008] Furthermore, the oil inlet nozzle is fitted inside the oil outlet branch connector and its threads are engaged. A sealing ring is provided between the oil inlet nozzle and the oil outlet branch connector. The sealing ring is located at the outer end of the oil outlet branch connector, and the thread provided on the inner wall of the oil outlet branch connector is located at its inner end.

[0009] Furthermore, the sealing end cap is located directly above the filter absorber. A support plate is fixedly connected to the filter absorber at the position corresponding to the sealing end cap. The support plate is vertically set and a limiting groove is opened on the support plate. The limiting groove is fitted onto the sealing end cap and is used to limit the sealing end cap in the radial direction.

[0010] Further, a limiting cylinder is fitted onto the filter press. The limiting cylinder is used to limit the filter press radially on the sealing end cap or oil inlet end cap. A liquid passage gap is left between the limiting cylinder and the second filter layer for liquid to pass through. A drain port is opened on the side wall of the limiting cylinder. The limiting cylinder is located directly above the suction filter. A connecting plate is fixedly connected between the limiting cylinder and the upper housing.

[0011] Furthermore, a cross-shaped rib is fixedly connected to the outer end face of the sealing end cap.

[0012] Furthermore, the third check valve is fixedly connected to the oil inlet end cover, and the valve of the third check valve is plugged in the oil inlet or in the channel of the oil inlet nozzle.

[0013] Furthermore, the downward projection of the filter press is located on the suction filter.

[0014] The beneficial effects of this utility model are: a filter press with a one-way valve is integrated into the suction filter, and the one-way valve can prevent backflow of the filter press, and this experimental model can realize three-way flow guidance, with a compact structure and easy production and assembly. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0016] Figure 2 This is a cross-sectional view of the first embodiment of the present invention;

[0017] Figure 3 This is a diagram showing the fit between the check valve and the oil inlet cap in this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the structure of the third embodiment of the present invention;

[0020] Figure 6This is a connection diagram of the present invention in the cooling and lubrication system. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings. Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The directional terms such as left, center, right, top, and bottom in the embodiments of the present invention are only relative concepts or referenced to the normal use state of the product, and should not be considered restrictive.

[0022] First embodiment:

[0023] A composite filter, such as Figure 1 and Figure 2 As shown, the device includes a suction filter 1, on which two oil outlets 11 are provided. A first check valve 31 and a second check valve 33 are respectively installed at the lower end of the two oil outlets 11. The conduction direction of the first check valve 31 and the second check valve 33 is consistent with the oil outlet direction of the suction filter 1. An oil outlet branch connector 111 is provided in the middle of one of the oil outlets 11. A filter press 2 is fixedly installed on the oil outlet branch connector 111. The oil inlet 23 of the filter press 2 is sleeved and sealed with the oil outlet branch connector 111. A third check valve 32 is provided in the liquid flow path from the oil inlet 23 to the inside of the filter press 2. The conduction direction of the third check valve 32 is consistent with the oil inlet direction of the filter press 2.

[0024] The suction filter 1 can have various structural forms, the most common being a flat structure. To facilitate the installation of the oil outlet 11, the suction filter 1 has a flat structure and includes an upper shell 12 and a lower shell 14 that are connected vertically. A first filter layer 13 is fixedly installed between the upper shell 12 and the lower shell 14. A clean liquid chamber is formed between the first filter layer 13 and the upper shell 12, and a mixed liquid chamber is formed between the first filter layer 13 and the lower shell 14. An inlet 15 is provided on the bottom wall of the lower shell 14. The two oil outlets 11 are both vertically installed and fixedly connected to the top wall of the upper shell 12. The filter press 2 is located to the left of the oil outlet 11, and the two oil outlets 11 are located to the right of the top surface of the upper shell 12.

[0025] To optimize the layout, the filter press 2 has a cylindrical structure and includes a cylindrical second filter layer 22. Sealing end caps 21 and oil inlet end caps 24 are respectively sealed and fixedly installed on both ends of the second filter layer 22. The sealing end caps 21 seal the ports of the second filter layer 22. Figure 3As shown, an oil inlet 25 is provided in the middle of the oil inlet end cap 24. The oil inlet 25 is connected to the inner cavity of the second filter layer 22. The oil inlet nozzle 23 is located on the oil inlet end cap 24 and covers the oil inlet 25. The oil inlet nozzle 23 is fitted inside the oil outlet branch connector 111 and is threadedly engaged with it. A sealing ring 26 is provided between the oil inlet nozzle 23 and the oil outlet branch connector 111. The sealing ring 26 is located at the outer end of the oil outlet branch connector 111. The thread provided on the inner wall of the oil outlet branch connector 111 is located at its inner end. The third one-way valve 32 is fixedly connected to the oil inlet end cap 24. The valve 321 of the third one-way valve 32 is plugged in the oil inlet 25 or in the channel of the oil inlet nozzle 23. The downward projection of the filter press 2 is located on the suction filter 1.

[0026] Second embodiment:

[0027] Other technical features are the same as in the first embodiment, combined with Figure 4 As shown, the sealing end cap 21 is located directly above the suction filter 1. A support plate 4 is fixedly connected to the suction filter 1 at the position corresponding to the sealing end cap 21. The support plate 4 is vertically arranged and a limiting groove 41 is opened on the support plate 4. The limiting groove 41 is sleeved on the sealing end cap 21 and is used to limit the sealing end cap 21 in the radial direction.

[0028] Third embodiment:

[0029] Other technical features are the same as in the first embodiment, combined with Figure 5 As shown, a limiting cylinder 5 is fitted onto the filter press 2. The limiting cylinder 5 is used to limit the filter press 2 radially on the sealing end cap 21 or the oil inlet end cap 24. A liquid passage gap is left between the limiting cylinder 5 and the second filter layer 22 for liquid to pass through. A drain port 2 is opened on the side wall of the limiting cylinder 5, and the drain port 2 faces the filter press 1, that is, downward. The limiting cylinder 5 is located directly above the suction filter 1. A connecting plate 6 is fixedly connected between the limiting cylinder 5 and the upper housing 12. In order to facilitate the screwing of the filter press 2, a cross rib 21 is fixedly connected to the outer end face of the sealing end cap 21.

[0030] When working, combine Figure 6 As shown, when the bidirectional electronic pump 7 rotates in the forward direction, the oil in the oil tank 8 is sequentially sent to the drive motor 100 and the reducer 101 after passing through the suction filter 1, the first check valve 31, the bidirectional electronic pump 7, the fourth check valve 34, and the oil cooler 9; when the bidirectional electronic pump 7 rotates in the reverse direction, the oil is sequentially sent back to the oil tank 8 after passing through the suction filter 1, the second check valve 33, the bidirectional electronic pump 7, the third check valve 32, and the filter press 2.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A composite filter, comprising a suction filter, characterized in that: Two oil outlets are provided on the housing of the suction filter. A first check valve and a second check valve are respectively installed at the lower end of the two oil outlets. The conduction direction of the first check valve and the second check valve are consistent with the oil outlet direction of the suction filter. An oil outlet branch connector is provided in the middle of one of the oil outlets. A filter press is fixedly installed on the oil outlet branch connector. The oil inlet of the filter press is sleeved and sealed with the oil outlet branch connector. A third check valve is provided in the liquid flow path from the oil inlet to the inside of the filter press. The conduction direction of the third check valve is consistent with the oil inlet direction of the filter press.

2. The composite filter according to claim 1, characterized in that: The suction filter has a flat structure and includes an upper shell and a lower shell that are connected vertically. A first filter layer is fixedly disposed between the upper shell and the lower shell. A clean liquid chamber is formed between the first filter layer and the upper shell, and a mixed liquid chamber is formed between the first filter layer and the lower shell. An inlet is provided on the bottom wall of the lower shell, and two oil outlets are vertically disposed and fixedly connected to the top wall of the upper shell.

3. The composite filter according to claim 2, characterized in that: The two oil outlets are located on the right side of the top surface of the upper housing, and the filter press is located on the left side of the oil outlets.

4. The composite filter according to claim 1, 2, or 3, characterized in that: The filter press has a cylindrical structure and includes a cylindrical second filter layer. Sealing end caps and oil inlet end caps are respectively sealed and fixed at both ends of the second filter layer. The sealing end caps block the ports of the second filter layer. An oil inlet is provided in the middle of the oil inlet end cap. The oil inlet is connected to the inner cavity of the second filter layer. The oil inlet nozzle is located on the oil inlet end cap and covers the oil inlet.

5. The composite filter according to claim 4, characterized in that: The oil inlet nozzle is fitted inside the oil outlet branch connector and is threaded to it. A sealing ring is provided between the oil inlet nozzle and the oil outlet branch connector. The sealing ring is located at the outer end of the oil outlet branch connector, and the thread provided on the inner wall of the oil outlet branch connector is located at its inner end.

6. The composite filter according to claim 4, characterized in that: The sealing end cap is located directly above the filter. A support plate is fixedly connected to the filter at the position corresponding to the sealing end cap. The support plate is vertically set and a limiting groove is opened on the support plate. The limiting groove is fitted onto the sealing end cap and is used to limit the sealing end cap in the radial direction.

7. The composite filter according to claim 4, characterized in that: A limiting cylinder is fitted onto the filter press. The limiting cylinder is used to limit the filter press radially at the sealing end cap or oil inlet end cap. A liquid passage gap is left between the limiting cylinder and the second filter layer for liquid to pass through. A drain port is opened on the side wall of the limiting cylinder. The limiting cylinder is located directly above the suction filter. A connecting plate is fixedly connected between the limiting cylinder and the upper housing.

8. The composite filter according to claim 4, characterized in that: A cross-shaped rib is fixedly connected to the outer end face of the sealing end cap.

9. The composite filter according to claim 4, characterized in that: The third check valve is fixedly connected to the oil inlet end cover, and the valve plug of the third check valve is located on the oil inlet or in the channel of the oil inlet nozzle.

10. The composite filter according to claim 4, characterized in that: The downward projection of the filter press is located on the suction filter.

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