Press filter with cooling function

Abstract

The invention provides a press filter with a cooling function, which comprises a shell and a filter cartridge arranged in the shell, a heat dissipation channel is arranged on the shell of the press filter, and oil to be filtered entering the press filter is fed into an outlet of the press filter through the heat dissipation channel; the shell is a barrel with an opening in the lower end, the two ends of a center hole of the filter cartridge are open, and the filter cartridge and the shell are coaxially arranged; the port of the outlet end of the heat dissipation channel is located on the top surface of the inner wall of the shell, the port of one end of the filter cartridge is located on the top surface in the shell and communicated with the port of the outlet end of the heat dissipation channel, and the port of the other end of the filter cartridge serves as an outlet of the press filter; the port of the outlet end of the heat dissipation channel and the outlet of the press filter are respectively communicated with the ports of the two ends of the center hole of the filter cartridge, so that the cooled oil liquid to be filtered and the filtered oil liquid are mixed in the center hole of the filter cartridge, and the mixed oil liquid is discharged through the outlet of the press filter, so that the cleanliness and the temperature uniformity of the oil liquid of the oil cooling electric drive system are improved.

Description

Technical Field

[0001] This invention relates to filter presses, and more specifically to a filter press with a cooling function. Background Technology

[0002] With the increasing complexity and expansion of passenger vehicle interiors, the space within the engine compartment is becoming increasingly compact. Oil-cooled electric drive systems typically include a suction filter, an electric pump, a filter press, and an oil cooler. The electric pump sequentially delivers oil through these components to be cooled and lubricated. The filter press primarily filters impurities from the oil, improving its cleanliness, while the oil cooler cools the transmission fluid. For some low-power oil-cooled electric drive systems, the requirements for heat dissipation and oil cleanliness are not high; therefore, a filter press with integrated cooling function can be used, eliminating the need for an oil cooler. Currently, the cooler is often directly integrated into the filter press housing, allowing the housing to cool the liquid flowing inside. However, the increased viscosity of the cooled liquid increases the burden on the filter medium and the electric pump. Summary of the Invention

[0003] To address the problems in the prior art, the present invention provides a filter press with a cooling function, aiming to ensure the stability of the filter press's filtration function.

[0004] A filter press with a cooling function includes a housing and a filter cartridge disposed within the housing. A heat dissipation channel is provided on the housing of the filter press, through which the oil to be filtered is sent to the outlet of the filter press. The housing is a barrel with an open bottom, and the filter cartridge has openings at both ends of its central hole. The filter cartridge and the housing are coaxially arranged. The outlet end of the heat dissipation channel is located on the top surface of the inner wall of the housing, and one end of the filter cartridge is located on the top surface inside the housing and communicates with the outlet end of the heat dissipation channel. The other end of the filter cartridge serves as the outlet of the filter press. This allows the cooled oil to be filtered and the filtered oil to be mixed in the central hole of the filter cartridge, and the mixed oil is discharged through the outlet.

[0005] Furthermore, the housing includes an inner shell and an outer shell, with the outer shell fitted onto the upper end of the inner shell. A heat dissipation channel is located between the inner shell and the outer shell, with the inlet port of the heat dissipation channel located on the side wall of the outer shell and the outlet port of the heat dissipation channel located on the top wall of the inner shell.

[0006] Furthermore, a gap is left between the inner shell and the outer shell, and an annular sealing plate is sealed at the port of the outer shell. The inner and outer rings of the annular sealing plate are welded or bonded to the outer wall surface of the inner shell and the port end face of the outer shell, respectively. A spiral baffle is provided in the gap, forming a spiral liquid channel between the spiral baffle, the outer shell and the inner shell, which is the heat dissipation channel.

[0007] Furthermore, air-cooled fins are provided on the outer wall surface of the shell.

[0008] Furthermore, the air-cooled fins include interconnected vertical fins and horizontal fins.

[0009] Furthermore, the casing is made of thermally conductive plastic.

[0010] Furthermore, a bypass valve is installed between the outlet end of the heat dissipation channel and the port of the filter cartridge. The bypass valve includes a compression spring, which abuts against the valve core of the bypass valve and is in a compressed state to form a reaction force to open the valve core.

[0011] Further, a paraffin wax pack is installed inside the bypass valve, with the paraffin wax pack and compression spring located on opposite sides of the valve core. A rod is installed between the valve core and the paraffin wax pack, with one end of the rod integrally connected to the valve core. A switch port matching the valve core is installed inside the bypass valve, with the valve core sealing the switch port. A groove for accommodating the paraffin wax pack is fixedly installed at the switch port. The groove is a cylindrical structure with one end open, and the opening of the groove faces the valve core. The paraffin wax pack is contained in the groove, and the other end of the rod passes through the groove and is embedded in the paraffin wax pack.

[0012] The beneficial effects of the present invention are as follows: the outlet port of the heat dissipation channel and the outlet of the filter press are respectively connected to the two ends of the central hole of the filter cartridge, so that the cooled oil to be filtered and the filtered oil are mixed in the central hole of the filter cartridge, and the mixed oil is discharged through the outlet of the filter press, thereby improving the cleanliness and temperature uniformity of the oil in the oil-cooled electric drive system. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 for Figure 1 Enlarged view of the structure of region A in the middle; Figure 3 This is a schematic diagram of the shell structure in this invention; Figure 4 A schematic diagram showing the bypass valve opening due to differential pressure. Figure 5 This is a schematic diagram showing the bypass valve opening due to temperature. Detailed Implementation

[0014] 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.

[0015] A filter press with cooling function, such as Figure 1 and Figure 2 As shown, the filter press includes a housing 5 and a filter cartridge 6 disposed within the housing 5. The housing 5 is preferably made of thermally conductive plastic, which is less expensive and lighter than conventional aluminum alloy. A heat dissipation channel 2 is provided on the housing 5 of the filter press, and the oil to be filtered is sent to the outlet 61 of the filter press through the heat dissipation channel 2. The housing 5 is a barrel with an open bottom. The filter cartridge 6 has openings at both ends of its central hole, and the filter cartridge 6 and the housing 5 are coaxially arranged. The outlet end of the heat dissipation channel 2 is located on the top surface of the inner wall of the housing 5. One end of the filter cartridge 6 is located on the top surface inside the housing 5 and communicates with the outlet end of the heat dissipation channel 2. The other end of the filter cartridge 6 serves as the outlet of the filter press. This allows the cooled oil to be filtered and the filtered oil to be mixed in the central hole of the filter cartridge 6. The mixed oil is discharged through the outlet 61 of the filter press, thereby improving the cleanliness and temperature uniformity of the oil in the oil-cooled electric drive system.

[0016] In order to facilitate the setting of heat dissipation channels inside the casing, such as Figure 3 As shown, the housing 5 includes an inner shell 51 and an outer shell 52. The outer shell 52 is fitted onto the upper end of the inner shell 51. A heat dissipation channel 2 is located between the inner shell 51 and the outer shell 52. The inlet port 21 of the heat dissipation channel 2 is located on the side wall of the outer shell 52, and the outlet port 22 of the heat dissipation channel 2 is located on the top wall of the inner shell 51. The lower end of the inner shell 51 is its sealing and fixing part. A gap is left between the inner shell 51 and the outer shell 52. An annular sealing plate 55 is used to seal the port of the outer shell 52. The inner ring of the annular sealing plate 55 and... The outer ring is welded or bonded to the outer wall of the inner shell 51 and the end face of the outer shell 52 respectively; a spiral partition 54 is provided in the gap, forming a spiral liquid channel between the spiral partition 54, the outer shell 52 and the inner shell 51, which is the heat dissipation channel 2; an air-cooled fin 53 or a liquid-cooled channel is provided on the outer wall of the outer shell 52. In this embodiment, the low-cost air-cooled fin 53 is used, and the air-cooled fin 53 is integrated with the outer shell 52; the air-cooled fin 53 includes vertical fins and horizontal fins that are connected to each other.

[0017] A bypass valve 3 is installed between the outlet end of the heat dissipation channel 2 and the port of the filter cartridge 6. The bypass valve 3 includes a compression spring 41, which abuts against the valve core 31 of the bypass valve and is in a compressed state to generate a reaction force to open the valve core 31; Figure 4 As shown, when the pressure difference between the inlet and outlet of bypass valve 3 reaches a set threshold, the valve core 31 opens after the filtered oil overcomes the reaction force. The increased viscosity of the oil due to low oil temperature and blockage of the filter medium can both cause the pressure difference between the inlet and outlet of bypass valve 3 to reach the set threshold. Furthermore, the pressure difference between the two sides of bypass valve 3 can be controlled by an electronic pump; that is, increasing the power of the electronic pump increases the pressure difference between the two sides of bypass valve 3. To ensure that the bypass valve 3 opens after the oil temperature inside the filter press reaches a certain threshold, a paraffin wax pack 43 is installed inside bypass valve 3. The paraffin wax pack 43 and the compression spring 41 are located on the valve core 31. On opposite sides, a rod 42 is provided between the valve core 31 and the paraffin bag 43, with one end of the rod 42 integrally connected to the valve core 31; a switch port 32 matching the valve core 31 is provided inside the bypass valve 3, and the valve core 31 is sealed on the switch port 32. A groove 44 for accommodating the paraffin bag 43 is fixedly provided at the switch port 32. The groove 44 is a cylindrical structure with one end open, and the opening of the groove 44 faces the valve core 31. The paraffin bag 43 can be completely or partially accommodated in the groove 44. The other end of the rod 42 passes through the groove 44 and is embedded in the paraffin bag 43; Figure 5 As shown, when the temperature of the oil in the filter press reaches the set threshold, the paraffin bag 43 expands due to heat, overcomes the reaction force of the compression spring 41, and pushes the end of the rod 42 out of the groove 44, thereby opening the switch 32. The paraffin bag 43 has obvious thermal expansion and contraction characteristics. When the oil temperature is lower than the set threshold and gradually cools down, the paraffin bag 43 cools down and contracts. At the same time, under the action of the compression spring 41, it pushes the end of the rod 42 into the groove 44, the valve core 31 of the bypass valve 3 closes, and the paraffin bag 43 contracts and clamps the end of the rod 42, creating a gap between it and the side wall of the groove 44. Thus, when the pressure difference is too large, the rod 42 can smoothly leave the groove 44 and open the valve core 31.

[0018] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter press having a cooling function, comprising a housing and a filter cartridge provided in the housing, characterized in that: The heat dissipation channel is arranged on the shell of the filter press, and the oil liquid to be filtered entering the filter press is sent to the outlet of the filter press through the heat dissipation channel; the shell is a barrel body with an open lower end, the center hole of the filter cartridge is open at both ends, and the filter cartridge and the shell are coaxially arranged; the outlet end port of the heat dissipation channel is located on the top surface of the inner wall of the shell, the one end port of the filter cartridge is located at the top surface in the shell and communicates with the outlet end port of the heat dissipation channel, and the other end port of the filter cartridge serves as the outlet of the filter press; so that the cooled oil liquid to be filtered and the filtered oil liquid are mixed in the center hole of the filter cartridge, and the mixed oil liquid is discharged through the outlet.

2. The filter press with cooling function according to claim 1, characterized in that: The shell comprises an inner shell and an outer shell, the outer shell is sleeved on the upper end of the inner shell, the heat dissipation channel is located between the inner shell and the outer shell, the inlet end port of the heat dissipation channel is located on the side wall of the outer shell, and the outlet end port of the heat dissipation channel is located on the top wall of the inner shell.

3. The filter press with cooling function according to claim 1, characterized in that: A gap is left between the inner shell and the outer shell, an annular sealing plate is sealed on the port of the outer shell, and the inner ring and the outer ring of the annular sealing plate are welded or bonded to the outer wall surface of the inner shell and the end face of the outer shell port respectively; a spiral baffle is arranged in the gap, and a spiral liquid channel is formed between the spiral baffle, the outer shell and the inner shell, that is, the heat dissipation channel.

4. The filter press with cooling function according to claim 2 or 3, characterized in that: Air cooling fins are arranged on the outer wall surface of the outer shell.

5. The filter press with cooling function according to claim 4, characterized in that: The air cooling fins comprise vertical fins and horizontal fins connected with each other.

6. The filter press with cooling function according to claim 1, characterized in that: The shell is made of heat-conducting plastic.

7. The filter press with cooling function according to claim 1, characterized in that: A bypass valve is arranged between the outlet end of the heat dissipation channel and the port of the filter cartridge, the bypass valve comprises a compression spring, the compression spring abuts against the valve core of the bypass valve and is in a compressed state to form a counterforce for opening the valve core.

8. The filter press with cooling function according to claim 7, characterized in that: A paraffin package is arranged in the bypass valve, the paraffin package and the compression spring are located on opposite sides of the valve core respectively, a rod body is arranged between the valve core and the paraffin package, one end of the rod body is integrally connected with the valve core; a switch opening matched with the valve core is arranged in the bypass valve, the valve core is sealed on the switch opening, and a groove body for accommodating the paraffin package is fixedly arranged at the switch opening, the groove body is a cylindrical structure with an open one end, the groove opening of the groove body faces the valve core, the paraffin package is accommodated in the groove body, and the other end of the rod body penetrates into the groove body and is embedded in the paraffin package.

Images