Filter device and 2k negative pressure heat exchanger thereof

Abstract

The present invention discloses a filter device and a 2K negative pressure heat exchanger thereof. The filter device includes a box, a filter frame, a filter core and a driver, on a side wall of the box has a replacing port, inside of the box has an isolation covered on the replacing port, the isolation cover is connected to a feeding pipe, on the isolation cover also has a discharging port, the box is connected to a discharging pipe, the replacing port is hinged to a sealing plate, the filter frame is vertically and rotationally provided in the isolation cover, a sealing member is provided between the filter frame and the isolation cover to seal the isolation cover, the feeding pipe is connected to the inside of the isolation cover, the bottom end of the filter frame has a through hole provided in correspondence with the discharging port, the filter core is vertically disposed on the filter frame, the two ends of the filter core are sealingly connected with the filter frame respectively, the inner cavity of the filter core is connected to the through hole correspondingly, and the driver is used to drive the filter frame to rotate. Compared with the existing technology, the present invention has the advantages of simple structure, easy disassembly and assembly, etc., which can reduce the time and manpower required to replace the heat exchanger filter core to a certain extent.

Description

l FILTERDEVICEANDZKNEGATIVEPRESSUREHEATEXCHANGERTHEREOF TECHNICALFIELD

[001] The present invention relates to the technical field of refrigeration and cryogenics, and in particular relates to a filter device and aZK negative pressure heat exchanger thereof. BACKGROUND

[002] The deep cryogenic temperature range is dened as from 0.3K to 120K. ZK negative pressure heat exchanger refers to the heat exchanger operating in the temperature zone from 4K liquid helium to ZK superuity helium, which can be used to recover the cold volume of deep cryogenic system and increase the production rate of superfluity helium. ZK negative pressure heat exchanger operates in deep cryogenic and negative pressure environment, such that temperature difference of heat exchange is small. The physical properties of helium change drastically in deep cryogenic environments, and there are two states of transition, 4K liquid helium and ZK superuity helium.

[003] The heat transfer, pressure drop performance and volume of the ZK negative pressure heat exchanger have a significant impact on the performance, construction and operating costs ofthe deep cryogenic system. In order to avoid the heat exchanger's heat exchange performance being affected by the excessive impurities retained in the inside of the heat exchanger after a long period of use, some heat exchangers on the market are added with filter devices that can filter the heat exchange medium that enters the inside of the heat exchangers. After these filter devices are used to a certain degree, internal lter cores thereof need to be replaced. However, disassembly and assembly of these lter devices as well as replacement ofthe lter core are very time-consuming and labor- consuming, which shortens the effective operation time of the heat exchanger, and increases the use cost ofheat exchangers. SUMMARY

[004] The object ofthe present invention is to: provide a filter device and aZK negative pressure heat exchanger having thereof in response to the above mentioned deficiencies in the prior art, which is capable of reducing to a certain extent the time and manpower required for replacing the heat exchanger filter core, so as to prolong the operation time of the heat exchanger and to reduce the use cost of the heat exchanger. In order to realize the above objects, the present invention adopts the following technical solutions:

[005] In a first aspect, the present invention provides a filter device for a ZK negative pressure heat exchanger, comprising:

[006] a box, wherein a side wall of the box has a replacing port, the inside of the box has an isolation cover covered on a replacing port, the isolation cover is connected to a feeding pipe extending out of the box, the isolation cover also has a discharge port, the box is connected to a discharging pipe, and the box is also hinged to a sealing plate for closing the replacing port,

[007] a lter frame vertically and rotationally provided in the isolation cover, wherein a sealing member is provided between the filter frame and the isolation cover to seal the isolation cover, the feeding pipe is connected to the inside of the isolation cover, and a bottom end of the filter frame has a through hole provided in correspondence with the discharging port,

[008] a filter core vertically disposed on the filter frame, wherein the two ends of the lter core are respectively sealingly connected with the filter frame, and an inner cavity of the lter core is connected in correspondence with the through hole, and a driver used to drive the lter frame to rotate.

[009] Preferably, one of a bottom wall of the isolation cover and a bottom wall of the lter frame has a first circular track and the other one of the bottom wall of the isolation cover and the bottom wall of the filter frame has a circular groove provided in correspondence with the first circular track.

[0010] Preferably, the first circular track is provided on a bottom wall of the isolation cover and the circular groove is provided on a bottom wall of the lter frame.

[0011] Preferably, the sealing plate is hinged to a bottom end of the replacing port, the sealing plate is provided with a second circular track, and the second circular track is coaxial with the first circular track when the sealing plate is placed horizontally.

[0012] Preferably, the filter device further comprises a position sensor and a control module, wherein the position sensor is provided on the outer side ofthe box, the position sensor is triggered when the sealing plate is placed horizontally, and the control module is communicatively connected to the driver and the position sensor respectively.

[0013] Preferably, the driver comprises a driving motor and a rotating rod, a motor compartment is provided inside of the box, the driving motor is provided in the motor compartment, the rotating rod is transmissively connected to the driving motor, and one end of the rotating rod extends into the isolation cover and is fixedly connected to the lter frame.

[0014] Preferably, the lter frame comprises a top plate and a bottom plate spaced apart along a height direction ofthe isolation cover, the top plate and the bottom plate are connected by a connecting pipe, the connecting pipe is also connected on both sides with partition plates respectively, an upper end and a lower end of the partition plate are connected to the top plate and the bottom plate respectively, and the rotating rod extends into the connecting pipe and is fixedly connected to the connecting pipe.

[0015] Preferably, the top plate has a mounting port, a bottom end of the filter core is attached to the bottom plate, a top end of the filter core is located in the mounting port, a top end of the mounting port is threaded with a pressing block for pressing down on the lter core, O-rings are provided between an outer side wall of a top end ofthe filter core and a side wall ofthe mounting port, and between an end face ofa bottom end ofthe filter core and the bottom plate.

[0016] Preferably, the lter core has a tubular structure, an outer side wall of a top end and an end face of a bottom end ofthe filter core has mounting grooves for mounting the O-rings respectively.

[0017] In a second aspect, the present invention provides a 2K negative pressure heat exchanger, comprising a filter device according to the first aspect, which may be one of a plate-fin heat exchanger, a plate heat exchanger, or awound tube heat exchanger.

[0018] The beneficial effects of the present invention compared to the prior art are as follows.

[0019] When the filter core needs to be replaced in the present invention, the sealing plate can be directly opened to expose the replacing port, and then the lter frame is driven to rotate by the driver such that the lter core thereon is moved out ofthe replacing port, and finally the lter core on the filter frame is replaced outside the replacing port. Compared with the prior art, the structure ofthe present invention is simple, and it is easy to disassemble and assemble when the filter core is replaced, which can reduce to a certain extent the time and manpower required for replacing the filter core ofthe heat exchanger, so as to prolong the operation time of the heat exchanger and reduce the use cost of the heat exchanger. BRIEFDESCRIPTIONOFTHEDRAWINGS

[0020] In order to more clearly illustrate specific embodiments ofthe present invention, the accompanying drawings to be used in specic embodiments will be briey described below. It should be noted that in all the accompanying drawings, the elements or parts are not necessarily drawn to actual scale.

[0021] FIG. 1 shows a sectional view of the overall structure of the filter device described in the embodiment of the present invention,

[0022] FIG. 2 shows a partially enlarged view atA in FIG. 1;

[0023] FIG. 3 shows a B-B sectional view in FIG. 1;

[0024] FIG. 4 shows a B-B sectional view of FIG. 1 with the filter frame removed,

[0025] FIG. 5 shows a partially enlarged view at C in FIG. 1,

[0026] FIG. 6 is a sectional view of the overall structure of the filter frame of the lter device described in the embodiment of the present invention,

[0027] FIG. 7 is a schematic view of the overall structure of the filter core of the filter device described in the embodiment of the present invention.

[0028] In the figures:

[0029] 1, box, 11, replacing port, 12, isolation cover, 13, feeding pipe, 14, discharging port, 15, discharging pipe, 16, sealing plate, 17, first circular track, 18, second circular track, 19, motor compartment, 2, filter frame, 21, through hole, 22, circular groove, 23, top plate, 24, bottom plate, 25, connecting pipe, 26, partition plate, 27, mounting port, 28, pressing block, 3, lter core, 31, O-ring, 32, mounting groove, 4, driver, 41, driving motor, 42, rotating rod, 5, position sensor, 6, sealing strip, 7, sealing ring. DETAILEDDESCRIPTION

[0030] In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions ofthe present invention will be described clearly and completely in the following in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments in the present invention and without making creative labor fall within the scope of protection of the present invention.

[0031] In the description of the present invention, it is to be clarified that orientation or positional relationships indicated by the terms "upper", "lower", "inner", "outer" and the like are based on the orientation or positional relationships shown in the accompanying drawings, only for the purpose of facilitating the description ofthe present invention and simplifying the description, and do not indicate or imply that the system or component referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore are not to be construed as a limitation to the present invention. Furthermore, the use ofthe terms "first", "second" and the like to limit the components is merely for the purpose of facilitating the differentiation ofthe components, and the terms do nothave a special meaning and cannot be construed as indicating or implying a relative importance, ifnot otherwise declared.

[0032] In the description ofthe present invention, it is to be noted that, unless otherwise expressly provided and limited, the terms "mounted", "connection", "connected" are to be understood in a broad sense, and e.g., it can be a fixed connection, a detachable connection, or a connection in one piece, it may be a mechanical connection or an electrical connection, it may be a direct connection or an indirect connection through an intermediate medium, and it may be a connection within two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in specific cases.

[0033] At present, some heat exchangers on the market are added with filter devices that can lter the heat exchange medium that enters the inside ofthe heat exchangers, in order to avoid the heat exchanger's heat exchange performance being affected by the excessive impurities retained in the inside ofthe heat exchanger after a long period ofuse. The lter device of these heat exchangers needs to replace the internal filter core after a certain degree ofuse. However, disassembly and assembly ofthese heat exchanger filter devices are very time-consuming and labor-consuming, so a lot of time and manpower are required when replacing the filter core, which will have a certain impact on the operating cost ofthe heat exchanger. Therefore, the present invention provides a filter device and a 2K negative pressure heat exchanger thereof, which is capable of reducing to a certain extent the time and labor required by the heat exchanger in replacing the filter core, so as to avoid an increase in the use cost of the heat exchanger due to the replacement of the lter core.

[0034] Exemplary embodiments of the present invention will be described in greater detail below with reference to the accompanying drawings. Although exemplary embodiments ofthe present invention are shown in the accompanying drawings, it should be understood, however, that the inventionmay be realized in various forms without being limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding ofthe present invention and to enable a complete communication of the scope of the invention to those skilled in the art.

[0035] Embodiment 1: As shown in FIGS. 1 - 5, an embodiment ofthe present invention provides a filter device comprising:

[0036] a box 1, wherein a side wall ofthe box 1 has a replacing port 11, the inside ofthe box 1 has an isolation cover 12 covered on a replacing port 11, the isolation cover 12 is connected to a feeding pipe 13 extending out ofthe box 1, the isolation cover 12 also has a discharge port 14, the box 1 is connected to a discharging pipe 15, and the box 1 is also hinged to a sealing plate 16 for closing the replacing port 11;

[0037] a filter frame 2 vertically and rotationally provided in the isolation cover 12, wherein a sealing member is provided between the filter frame 2 and the isolation cover 12 to seal the isolation cover 12, the feeding pipe 13 is connected to the inside of the isolation cover 12, and a bottom end of the filter frame 2 has a through hole 21 provided in correspondence with the discharging port 14,

[0038] a filter core 3 vertically disposed on the filter frame 2, wherein the two ends of the filter core 3 are respectively sealingly connected with the filter frame 2, and an inner cavity of the filter core 3 is connected in correspondence with the through hole 21; and

[0039] a driver 4 used to drive the filter frame 2 to rotate.

[0040] In the embodiment of the present invention, when it is used, the heat exchange medium first can be passed into the isolation cover 12 through the feeding pipe 13, the heat exchange medium after passing into the isolation cover 12 can penetrate the side wall of the filter core 3 to enter the inner cavity ofthe filter core 3 and flow into the box 1 through the through hole 21 and the discharge port 14, and finally flow into the inside ofthe heat exchanger through the discharging pipe 15. When the filter core 3 needs to be replaced, the sealing plate 16 can be opened directly to expose the replacing port 11, and the filter frame 2 can be driven by the driver 4 to rotate such that the filter core 3 thereon is moved out of the replacing port 11, so that the lter core 3 on the lter frame 2 can be replaced outside the replacing port 11. Compared with the prior art, it is easy to disassemble and assemble when replacing the filter core 3 in the present invention, effectively reducing the time and material resources required in replacing the lter core 3, and avoiding the increase in the operating cost of the 2K negative pressure heat exchanger due to the replacement of the filter core 3.

[0041] Further, the bottom wall ofthe isolation cover 12 has a rst circular track 17, and the bottom wall ofthe lter frame 2 has a circular groove 22 that corresponds to the first circular track 17. The first circular track 17 and the circular groove 22 ofthis embodiment can on the one hand cooperate to form a support for the filter frame 2, and on the other hand guide the filter frame 2 when the filter frame 2 rotates.

[0042] It is to be appreciated that in some other embodiments of the present invention, the first circular track 17 may also be provided on the bottom wall of the filter frame 2, and accordingly the circular groove 22 may be provided on the bottom wall of the isolation cover 12.

[0043] Further, the sealing plate 16 is hinged to the bottom end ofthe replacing port 11, and the sealing plate 16 is provided with a second circular track 18, and when the sealing plate 16 is placed horizontally, the second circular track 18 is coaxial with the first circular track 17.

[0044] In this embodiment, when the filter core 3 is replaced, the sealing plate 16 can be rotated to a horizontal position, and the second circular track 18 cooperates with the circular groove 22 to guide the filter frame 2 during the rotation of the filter frame 2 to move out ofthe replacing port 11. At the same time, the second circular track 18 can also cooperates with the circular groove 22 to support the filter frame 2 when the filter core 3 is replaced after the filter frame 2 is moved out of the replacing port 11.

[0045] Further, a position sensor 5 and a control module are also included, the position sensor 5 is provided on the outer side ofthe box 1, the position sensor 5 is triggered when the sealing plate 16 is placed horizontally, and the control module is communicatively connected to the driver 4 and the position sensor 5, respectively.

[0046] In the embodiment, by setting the position sensor 5 and the control module, when the sealing plate 16 is rotated to a horizontal position during the process of replacing the lter core 3, the sealing plate 16 can trigger the position sensor 5, the position sensor 5 sends a signal to the control module, and the control module receives the signal from the position sensor 5 and then controls the driver 4 to automatically move the lter frame 2 to the outside of the replacing port 11. This can reduce the workload of the operator in the process of replacing the filter core 3, making the replacement of the filter core 3 of the present embodiment more convenient and faster.

[0047] The control module of the present embodiment may be a conventional module such as a microcontroller or a PLC.

[0048] As shown in FIG. 1, in another embodiment of the present invention, the driver 4 includes a driving motor 41 and a rotating rod 42, a motor compartment 19 is provided inside of the box 1, the driving motor 41 is provided in the motor compartment 19, the rotating rod 42 is transmissively connected to the driving motor 41, and one end of the rotating rod 42 extends into the isolation cover 12 and is fixedly connected to the filter frame 2.

[0049] It is to be noted that in some other embodiments ofthe present invention, instead of using the above-mentioned type of driver 4, other types of driver 4 may also be used. For example in some specific embodiments, other types of driver 4 such as a rotating handle may be provided to realize the rotation of the filter frame Z.

[0050] Further, the filter frame 2 includes a top plate 23 and a bottom plate 24 spaced apart along the height direction ofthe isolation cover 12, the top plate 23 and the bottom plate 24 are connected by a connecting pipe 25, on both sides of the connecting pipe 25 is also connected with a partition plate 26, and the upper end and the lower end of the partition plate 26 are connected to the top plate 23 and the bottom plate 24 respectively, and the rotating rod 42 extends into the connecting pipe 25 and is fixedly connected to the connecting pipe 25.

[0051] As shown in FIG. 2-FIG. 3, the top plate 23, the bottom plate 24, and the partition plate 26 of the filter frame 2 are each provided with a sealing strip 6 on the side facing toward the isolation cover 12, and between the bottom plate 24 and the isolation cover 12 is provided with a sealing ring 7 provided around the through hole 21 and the discharge port 14. The sealing strip 6 and the sealing ring 7 are capable of making the isolation cover 12 remain sealed from the outside.

[0052] The sealing strip 6 and the sealing ring 7 ofthe present embodiment do not affect the normal rotation of the filter frame 2 although they increase the friction force of the rotation of the filter frame 2 when the filter frame 2 is rotated.

[0053] Further, as shown in FIG. 6, the top plate 23 has a mounting port 27, the bottom end of the filter core 3 is attached to the bottom plate 24, the top end of the filter core 3 is located in the mounting port 27, the top end ofthe mounting port 27 is threaded with a pressing block 28 for pressing down on the filter core 3, and O-rings 31 are provided between an outer side wall of the top end of the filter core 3 and the side wall of the mounting port 27, and between the end face ofthe bottom end of the filter core 3 and the bottom plate 24.

[0054] In this embodiment, when replacing the filter core 3, an old filter core 3 can be removed from the mounting port 27 only by screwing the pressing block 28 to remove it from the mounting port 27, and then a new filter core 3 can be placed in the filter frame 2 through the mounting port 27, and finally, the pressing block 28 can be re-screwed to the mounting port 27 to compress the filter core 3 to complete the replacement work of the filter core 3. It can be seen that it requires a small amount of disassembly work for replacing the lter core 3 in the present embodiment, and the speed and efficiency of the replacement of the filter core 3 can be further improved.

[0055] Specifically, as shown in FIG. 7, the filter core 3 has tubular structure, and the top end and the bottom end of the filter core 3 have mounting grooves 32 for mounting the O-ring 31 respectively, the mounting groove 32 at the top end of the filter core 3 is provided on its outer side wall, and the mounting groove 32 at the bottom end ofthe lter core 3 is provided on the end face of the bottom end. It is to be understood that the material ofthe lter core 3 may be made of, for example, PTFE, polyimide, alumina ceramics, silicon carbide ceramics, or graphitized polystyrene, and the present embodiment does not impose any limitation thereon.

[0056] Embodiment 2:

[0057] An embodiment of the present invention provides a 2K negative pressure heat exchanger which employs any one of the filter devices as described in embodiment 1 above for filtering the heat exchange medium entering inside.

[0058] It is to be appreciated that the 2K negative pressure heat exchanger provided in this embodiment may be one of a plate-fin heat exchanger, a plate heat exchanger, or a wound tube heat exchanger.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, not to limit it, although the present invention has been described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that it is still possible to modify the technical solution recorded in the foregoing embodiments or to replace some of the technical features therein by equivalent ones, and these modifications or replacements do not make the corresponding technical solution deviate from the essence of the present invention. These modifications or substitutions do not take the essence of the technical solutions out of the spirit and scope of the technical solutions of the embodiments of the present invention.

[0060] In the following paragraphs, clauses are provided: Clause 1. A lter device for ltering heat exchange medium of a 2K negative pressure heat exchanger, comprising: a box (1), wherein a side wall of the box (1) has a replacing port (11), the inside of the box (1) has an isolation cover (12) covered on a replacing port (11), the isolation cover (12) is connected to a feeding pipe (13) extending out ofthe box (1), the isolation cover (12) also has a discharge port (14), the box (1) is connected to a discharging pipe (15), and the box (1) is also hinged to a sealing plate (16) for closing the replacing port (11); a lter frame (Z) vertically and rotationally provided in the isolation cover (12), wherein a sealing member is provided between the lter frame (2) and the isolation cover (12) to seal the isolation cover (12), the feeding pipe (13) is connected to the inside ofthe isolation cover (12), and a bottom end of the lter frame (2) has a through hole (21) provided in correspondence with the discharging port (14), a lter core (3) vertically disposed on the lter frame (2), wherein the two ends of the lter core (3) are respectively sealingly connected with the lter frame (2), and an inner cavity ofthe lter core (3) is connected in correspondence with the through hole (21), and a driver (4) used to drive the lter frame (2) to rotate. Clause Z. The lter device according to clause 1, characterized in that, one of a bottom wall ofthe isolation cover (12) and abottom wall ofthe lter frame (2) has a rst circular track (17) and the other one ofthe bottom wall ofthe isolation cover (12) and the bottom wall ofthe lter frame (2) has a circular groove (22) provided in correspondence with the rst circular track (17). Clause 3. The lter device according to clause 2, characterized in that, the rst circular track (17) is provided on a bottom wall ofthe isolation cover (12) and the circular groove (22) is provided on a bottom wall ofthe lter frame (2). Clause 4. The lter unit according to clause 3, characterized in that, the sealing plate (16) is hinged to a bottom end of the replacing port (11), the sealing plate (16) is provided with a second circular track (18), and the second circular track (18) is coaxial with the rst circular track (17) when the sealing plate (16) is placed horizontally. Clause 5. The lter device according to clause 4, further comprising a position sensor (5) and a control module, wherein the position sensor (5) is provided on the outer side ofthe box (1), the position sensor (5) is triggered when the sealing plate (16) is placed horizontally, and the control module is communicatively connected to the driver (4) and the position sensor (5) respectively. Clause 6. The lter device according to clause 1, characterized in that, the driver (4) comprises a driving motor (41) and a rotating rod (42), a motor compartment (19) is provided inside of the box (1), the driving motor (41) is provided in the motor compartment (19), the rotating rod (42) is transmissively connected to the driving motor (41), and one end of the rotating rod (42) extends into the isolation cover (12) and is xedly connected to the lter frame (2). Clause 7. The lter device according to clause 6, characterized in that, the lter frame (2) comprises a top plate (23) and a bottom plate (24) spaced apart along a height direction ofthe isolation cover (12), the top plate (23) and the bottom plate (24) are connected by a connecting pipe (25), the connecting pipe (25) is also connected on both sides with partition plates (26) respectively, an upper end and a lower end ofthe partition plate (26) are connected to the top plate (23) and the bottom plate (24) respectively, and the rotating rod (42) extends into the connecting pipe (25) and is xedly connected to the connecting pipe (25). Clause 8. The lter unit according to clause 7, characterized in that, the top plate (23) has a mounting port (27), a bottom end ofthe lter core (3) is attached to the bottom plate (24), a top end ofthe lter core (3) is located in the mounting port (27), atop end ofthe mounting port (27) is threaded with a pressing block (28) for pressingdown on the lter core (3), O-rings (31) are provided between an outer side wall ofa top end ofthe lter core (3) and a side wall ofthe mounting port (27), and between an end face of a bottom end of the lter core (3) and the bottom plate (24). Clause 9. The lter device according to clause 8, characterized in that, the lter core (3) has a tubular structure, an outer side wall of a top end and an end face of a bottom end ofthe lter core (3) has mounting grooves (32) for mounting the O-rings (31) respectively. Clause 10. AZK negative pressure heat exchanger, comprising a lter device according to any one of clauses 1-9, which may be one of a plate-n heat exchanger, a plate heat exchanger, or awound tube heat exchanger.

Claims

1. A filter device for filtering the heat exchange medium of a 2K negative pressure heat exchanger, comprising: a house (1), where a side wall of the house (1) has a replacement gate (11), where the inside of the house (1) has an insulation covering (12) that has a replacement gate (11) covers, where the insulation cover (12) is connected to a supply pipe (13) which is extends outside the house (1), with the insulation cover (12) also having a drainage port (14), whereby the house (1) is connected to a drain pipe (15), and whereby the house (1) also is hinged to a sealing plate (16) for closing the replacement gate (11), a filter holder (2) mounted vertically and rotating in the insulation cover (12), whereby a sealing member is provided between the filter holder (2) and the insulation cover (12) to to seal the insulation cover (12), with the supply pipe (13) connected to the inside of the insulation cover (12), and a lower end of the filter holder a passage (21) has connected to the discharge port (14), a filter core (3) placed vertically in the filter holder (2), with the two ends of the filter core (3) are sealed to the filter holder (2), and a inner cavity of the filter core (3) is connected to the passage (21), and a drive for rotation of the filter holder (2).

2. The filter device of claim 1, characterized in that one of a bottom wall of the insulation cover (12) or a bottom wall of the filter holder (2) a first one has a circular path (17) and the other has a circular groove (22) applied in accordance with the first circular path (17).

3. The filter device of claim 2, characterized in that the first circular track (17) is fitted on a bottom wall of the insulation cover (12) and the circular groove (22) is provided on a bottom wall of the filter holder (2). The filter device of claim 3, characterized in that the sealing plate (16) has a hinge has near a lower end of the replacement gate (11), where the sealing plate (16) is provided with a second circular track (18), the second circular orbit (18) is coaxial with the first circular orbit (17) when the sealing plate (16) is placed horizontally.

5. The filter device of claim 4, further comprising a position sensor (5) and a control module, where the position sensor (5) is mounted on the outside of the housing (1), the position sensor (5) is activated when the sealing plate (16) is positioned horizontally, and the control module is communicatively connected to the drive (4) and the position sensor (5).

6. The filter device according to any one of the preceding claims, characterized in that the drive (4) comprises a drive motor (41) and a rotating rod (42), a engine compartment (19) is provided inside the housing (1), with the drive motor (41) provided in the engine compartment (19), with the rotating rod (42) connected to the drive motor (41), and one end of the rotating rod (42) extends into the insulation cover (12) and is connected to the filter holder (2).

7. The filter device of claim 6, characterized in that the filter holder (2) has a top plate (23) and a bottom plate (24) which are spaced apart along a height direction of the insulation cover (12), with the top plate (23) and the bottom plate (24) are connected via a connecting pipe (25), with the connecting pipe (25) on both sides is connected to dividing plates (26), having an upper end and a lower end of the separation plate (26) are connected to the top plate (23) and the base plate (24), and the rotating rod (42) extending into the connecting pipe (25) and is firmly connected to the connecting pipe (25).

8. The filter unit of claim 7, characterised in that the top plate (23) has a mounting port (27), with a lower end of the filter core (3) attached to the base plate (24), with an upper end of the filter core (3) located in the mounting port (27), wherein an upper end of the mounting port (27) engages a pressure block (28) for pressing the filter core (3), with O-rings (31) provided between an outer side wall of an upper end of the filter core (3) and a side wall of the mounting port (27), and between an end face of a lower end of the filter core (3) and the base plate (24).

9. The filter device of claim 8, characterized in that the filter core (3) has a has a tubular structure, and having an outer side wall of an upper end and a end face of a lower end of the filter core (3) mounting grooves (32) have for the mounting the O-rings (31).

10. A 2K negative pressure heat exchanger, comprising a filtration device of one of the claims 1-9, comprising one of: a plate-fin heat exchanger, a plate heat exchanger, or a heat exchanger with tubes. 1 / 7 FIG.1 2 / 7 FIG.2