Locking mechanism, filter shell and dehumidification device

Abstract

There is presented herein a locking mechanism for locking and releasing a filter cartridge in a filter housing, the locking mechanism comprising: an elongated beam configured to be arranged at a first side of the filter cartridge; an abutment element configured to be arranged at an opposite second side of the filter cartridge; and a rod having a longitudinal axis and a first connection point and a second connection point arranged along the longitudinal axis, the rod being connected to the beam at the first connection point and being rotatable about an axis of rotation at the second connection point. The locking mechanism is configured such that rotation of the lever in the first direction about the axis of rotation moves the beam from the open position to a locked position in which the beam clamps the filter cartridge against the abutment element.

Description

Technical Field

[0001] The solution of the present invention proposed herein relates to a locking mechanism, a filter housing, and a dehumidifying device. Background Art

[0002] Various types of air handling systems are commonly used to supply conditioned air into a defined space. Such air handling systems typically include some kind of gas adsorption device having a gas adsorption element. One such air handling system involves the use of a gas adsorption rotor, typically a desiccant rotor also known as a desiccant wheel, for dehumidifying air. The rotor rotates and thereby presents the desiccant in the rotor to the process air stream and the regeneration air stream of the air handling system. Regeneration may also be referred to as reactivation.

[0003] The desiccant rotor typically includes a rotor medium having finely divided desiccant impregnated in a semi-ceramic structure that may resemble corrugated cardboard that has been rolled into a wheel shape in appearance. The rotor slowly rotates between the process air stream and the regeneration air stream. The process air flows through the channels formed by the corrugations and the desiccant rotor adsorbs or absorbs moisture. Then, when the wheel rotates into the regeneration air stream, the desiccant is heated by the hot regeneration air and the desiccant releases its moisture into the regeneration air.

[0004] After regeneration, the desiccant rotates back into the process air stream, where the process is repeated.

[0005] The air stream entering the air handling system typically passes through a filter that purifies the air stream before it flows through the intended unit for treatment. Such a unit may be a gas adsorption rotor or any similar device. The filter performs a pretreatment of the air by, for example, blocking large particles from entering the treatment unit. The filter may be mounted in a filter cartridge disposed in a filter housing of any suitable type.

[0006] To ensure satisfactory pretreatment, the filter in the air handling system needs to be removed, cleaned, or replaced regularly. However, the filter is not always easily accessible to the user who needs to reach it. In addition, the inconvenient way of mounting the filter enclosed in the filter cartridge or a stand-alone filter in the air handling system means that the user who needs to remove the filter must endure a cumbersome process to remove the filter. Such a removal process is ergonomically unfriendly and may cause injury when performed repeatedly. Additionally, there are typically many sharp edges that can harm the user and the mechanism for removing the filter is usually arranged on the dirty side of the filter, which is harmful to both the user and the device itself.

[0007] The filters need to be installed and fixed correctly so that the filters remain in place during operation. At the same time, as described above, the filters need to be accessible so that they can be replaced. Therefore, the locking mechanisms for holding the filters, such as those disposed in the filter cartridges, need to provide accessibility as well as stability and strength.

[0008] One type of prior art locking mechanism includes a bent metal sheet support having a rubber ring, and the bent metal sheet support moves along a track in the filter housing to fix the filter. This solution subjects the filter cartridge to uneven concentrated loads, which has an adverse effect on the filter cartridge and the locking mechanism itself.

[0009] Therefore, there is a need for a locking mechanism for locking and releasing a filter cartridge in a filter housing, which remains in place during operation while providing convenient access to the filter. SUMMARY OF THE UTILITY MODEL

[0010] The object of the present solution is to mitigate, alleviate or eliminate one or more of the above-mentioned defects and drawbacks in the prior art and at least solve the above problems.

[0011] According to a first aspect, there is provided a locking mechanism for locking and releasing a filter cartridge in a filter housing. The locking mechanism includes: an elongate beam configured to be disposed at a first side portion of the filter cartridge; a abutting element configured to be disposed at an opposite second side portion of the filter cartridge; and a rod having a longitudinal axis and a first connection point and a second connection point disposed along the longitudinal axis. The rod is connected to the beam at the first connection point and is rotatable about a rotation axis at the second connection point. The locking mechanism is configured such that rotation of the rod about the rotation axis in a first direction moves the beam from an open position to a locked position, in which the beam clamps the filter cartridge against the abutting element. Thus, the filter cartridge is clamped between the beam and the abutting element. Reverse movement of the rod releases the filter cartridge, thereby allowing removal of the cartridge.

[0012] Therefore, rotation of the rod causes an angular displacement of the rod, which can be expressed in terms of the degree of rotation, such as by a certain angle. The degree of angular displacement resulting from rotation of the rod in the first direction, which is the locking direction, can be expressed as a positive angle α. The degree of angular displacement resulting from rotation of the rod in a second direction opposite to the first direction can be expressed as a negative angle β.

[0013] The locking mechanism may also be referred to as a filter locking module. The filter housing may include a plurality of filter locking mechanisms. Advantageously, the filter housing may include two locking mechanisms according to the present invention, which are arranged at a first height and a second height of the filter housing. The first height may be at the bottom side portion of the filter housing and the second height may be at the top side portion of the filter housing, or the first height may be at the top side portion of the filter housing and the second height may be at the bottom side portion of the filter housing. Thus, the elongated beam of each locking mechanism may be arranged at the first height and / or the second height of the first side portion of the filter cartridge in the filter housing.

[0014] The locking mechanism provided herein ensures that a uniformly distributed load is applied to the filter cartridge, particularly due to the elongated shape of the beam arranged at the first side portion of the filter cartridge. The uniformly distributed load applies less stress on the filter cartridge while still providing sufficient holding strength to hold the filter cartridge in place during operation.

[0015] Thus, the adverse effects of concentrated loads on the filter cartridge, such as damage in the form of bending or compression, are avoided. Therefore, the distributed load along the elongated beam minimizes the risk of damaging the filter cartridge.

[0016] The locking mechanism disclosed herein facilitates maintenance by providing uncomplicated access to the filter cartridge. In addition, the configuration of the locking mechanism minimizes the risk of damaging the frame of the filter housing when the user attempts to remove the filter cartridge. The uniform movement of the beam in response to the rotation of the rod ensures correct alignment along the entire length of the first side portion of the filter cartridge. Furthermore, the locking mechanism herein does not have any sharp edges or inconveniently located fastening devices that may cause physical harm to the user.

[0017] The locking mechanism may include a bent metal sheet. The elongated beam may be a U-shaped beam. The U-shaped beam helps to provide uniform support along the entire length of the filter cartridge while not using as much material as a solid beam with a rectangular cross-section. The engaging member in the locking mechanism may be configured to have a screw and a blind rivet nut, thereby achieving smooth movement of the beam in response to the rotation of the rod.

[0018] The locking mechanism herein provides a modular design, enabling easy installation and efficient production. The locking mechanism can be easily adjusted and scaled to fit different filter types and filter housings. Although referred to herein as a "filter cartridge", it should be understood that the term "cartridge" can include any suitable type of fully or partially enclosed filter of any suitable filter. The locking mechanism herein is configured to fit any suitable filter type, such as panel filters, bag filters, or combinations of these filters, where the filter is enclosed in a filter cartridge or arranged in any other suitable manner. The filter can be a high-efficiency particulate air (HEPA) filter.

[0019] The abutting element of the locking mechanism can be arranged on the base plate. In some examples, the base plate is the bottom surface of the filter housing. Alternatively, the abutting element can be a flange of the base plate and / or a part of the frame of the filter housing. The frame of the filter housing can be a frame arranged in the filter housing so as to surround the filter cartridge on a second side of the filter cartridge. Advantageously, the abutting element is smooth at least on one side that abuts the filter cartridge. The intended meaning of "smooth" herein is that the abutting element has a flat surface without any joints, rivets, etc. that may cause uneven contact surfaces with the filter cartridge.

[0020] According to some examples, the locking mechanism includes a base plate, where a beam rests on the base plate and a rod is rotatably connected to the base plate at a second connection point such that the beam moves on the base plate as the rod rotates about a rotation axis. Thus, the smooth and uniform movement of the beam in response to the rotation of the handle is further enhanced.

[0021] According to some examples, the rod includes an elongated central portion having a longitudinal axis extending along the longitudinal axis of the rod and a transverse axis extending substantially perpendicular to the longitudinal axis. In such an example, the central portion includes a first connection point and a second connection point, meaning that the first connection point and the second connection point are arranged on or at the central portion of the rod. The rod can also include a first outer portion and a second outer portion, each outer portion extending along opposite sides of the central portion and having a respective longitudinal axis parallel to the longitudinal axis of the central portion. The first outer portion and the second outer portion can each have a respective transverse axis extending from the central portion in a direction substantially perpendicular to the longitudinal axis of the central portion. The first outer portion of the rod can be arranged to limit the rotation of the rod in a first direction, and the second outer portion can be arranged to limit the rotation of the rod in a second direction opposite to the first direction. The first outer portion, the second outer portion, and the central portion can be substantially rectangular, where the length in the longitudinal direction is longer than the length in the transverse direction.

[0022] The distance between the first connection point connecting the rod to the beam and the first outer part is advantageously in the range of 15 mm to 22 mm, preferably 18 mm. Since the first outer part of the rod can be arranged to limit the rotation of the rod in the first direction, i.e., the locking direction, the distance between the first connection point and the first outer part affects the degree of angular displacement of the rod. Within the concept of the present invention, other distances than those mentioned above can be envisaged, depending on the specific circumstances. For example, the configuration of the particular filter cartridge to be clamped can affect the suitable distance between the first connection point and the first outer part. In other words, the distance from the center point of the first connection point to the upper edge of the first outer part, which abuts against the beam and thereby limits the movement of the rod, is preferably in the range of 15 mm to 22 mm, most preferably 18 mm.

[0023] When the handle has been rotated a predetermined distance in the first direction or the second direction respectively, the first outer part and the second outer part of the rod can limit the rotation of the handle by bearing on the beam. Thus, when the rod has reached a certain rotation point where the first outer part or the second outer part of the rod contacts the beam, the beam prevents the rod from further rotating. The first outer part can extend further along the rod than the second outer part, or the second outer part can extend further along the rod than the first outer part, thereby allowing different degrees of rotation of the rod in the first direction or the second direction respectively.

[0024] The locking function of the locking mechanism can be referred to as an elbow joint. In such an example, the rotation of the rod is restricted by the configuration of the locking mechanism, which does not allow a full 360-degree rotation. For example, due to the arrangement of the outer part of the rod, the rotation is restricted to not exceed a predetermined angular displacement. The locking mechanism can be configured, for example, to allow an angular displacement of less than or equal to 180 degrees, less than or equal to 125 degrees, or even less than or equal to 90 degrees. Due to the configuration of the locking mechanism, the locking mechanism does not require any springs or other auxiliary fastening devices. Therefore, the locking mechanism is highly productive and does not include multiple components that may be damaged and need to be replaced.

[0025] In some examples of the locking mechanism disclosed herein, the rotation of the rod about the axis of rotation can cause the first connection point of the rod to shift along a circular path such that when the first connection point and the second connection point of the rod are aligned with the transverse axis of the beam, the first connection point reaches the vertex of the circular path. In such an exemplary embodiment, the first connection point can shift in the first direction beyond the vertex of the circular path when the rod rotates about the axis of rotation in the first direction to move the beam from the open position to the locked position, such that in the locked position, a positive angle α is formed between the longitudinal axis of the rod and the transverse axis of the beam. In other words, the rod has been angularly displaced in the first direction to the extent represented by the angle α.

[0026] In the locked position, the positive angle α can range from 1 degree to 20 degrees. In some example embodiments, in the locked position, the positive angle α can range from 1 degree to 15 degrees. Advantageously, the positive angle α can be approximately 10 degrees in the locked position, which means that the maximum rotation of the positive angle α in the first direction is approximately 10 degrees. In other words, the positive angle α formed between the longitudinal axis of the rod and the transverse axis of the beam reaches its maximum when the rod rotates as far as possible in the first direction, i.e., the locking direction. At the maximum rotation position, the rod has reached its final locked position and is restricted from any further movement in the first direction. The final locked position can be configured, for example, by changing the length of the first outer portion of the rod and / or adjusting the distance between the first connection point and the upper edge of the first outer portion of the rod to fit the filter cartridge to be clamped. Herein, the "upper" edge should be understood as the edge of the first outer portion closest to the beam, which will abut against the beam and thereby restrict the movement of the beam.

[0027] In some example embodiments, the first direction of movement is clockwise and the opposite second direction is counterclockwise, but the direction of movement is naturally affected by the perspective from which the locking mechanism is observed.

[0028] In other words, when the handle rotates about the axis of rotation such that the first connection point exceeds the apex of the circular path in the first direction, the beam reaches the locked position. The first connection point is the connection point between the rod and the beam such that the movement of the rod is translated via the first connection point into subsequent movement of the beam. The longitudinal axis and the transverse axis of the beam can be imagined as forming the x-axis and the y-axis of a coordinate system, respectively. When the longitudinal axis of the rod is parallel to the transverse axis of the beam, a right angle is formed between the longitudinal axis of the rod and the longitudinal axis of the beam. This position can be said to represent a 0-degree angle between the longitudinal axis of the rod and the transverse axis of the beam. The rotation of the rod causes the rotation of the longitudinal axis of the rod relative to the transverse axis of the beam, which is in a fixed direction in the locking mechanism since the beam only moves linearly and does not rotate. Thus, the rotation of the rod in the first direction results in the formation of an angle between the longitudinal axis of the rod and the transverse axis of the beam. This angle can be referred to as the positive angle α. The angle formed between the longitudinal axis of the rod and the transverse axis of the beam is 0 degrees when these two axes are parallel. For example, if the movement in the first direction is clockwise, the clockwise rotation of the rod increases the angle between the transverse axis of the beam, which remains at 0 degrees, and the longitudinal axis that has rotated clockwise. Regardless of the direction of movement, the angle formed by the rotation of the rod in the first direction is denoted herein as the positive angle α.

[0029] The locking action of the locking mechanism starts when the beam abuts against the first side portion of the filter cartridge. When the rod rotates or turns, the beam presses the filter cartridge against the abutting element. When the rod rotates beyond the 0-degree position to the final position, the maximum positive angle α is reached. In some examples, the first outer portion or the second outer portion of the rod contacts the beam at the final position, such that further rotation of the rod is blocked by the beam, which prevents the rod from further rotating.

[0030] Alternatively or additionally, when the rotation of the rod about the axis of rotation in the second direction moves the beam from the locked position to the open position, the first connection point can be displaced beyond the apex of the circular path in the second direction, such that in the open position, a negative angle β is formed between the longitudinal axis of the rod and the transverse axis of the beam. In other words, the rod has been angularly displaced in the second direction to an extent represented by the angle β. In the open position, the negative angle β can be in the range of -1 degree to -80 degrees.

[0031] To improve the ergonomic characteristics of the locking mechanism herein, the rod can include attachment members and a handle at the first connection point and the second connection point. Thus, the rod can include an ergonomic handle that a user grasps when releasing and locking the filter cartridge, such as when replacing the filter.

[0032] To enhance the robustness of the locking mechanism, the rod can rotate about a bolt at the axis of rotation, where the bolt connects the attachment member of the rod and the gripping member.

[0033] According to some examples, at least the rod and the beam are configured to be arranged downstream of the air flow passing through the filter cartridge on the clean side of the filter cartridge. Thus, the user-accessible components of the locking mechanism herein, particularly the rod and the beam, are arranged on the clean side of the filter. Thus, the user is not exposed to contaminants when replacing the filter, and the technical life of the components is not shortened due to contamination. Further, the movement of the rod is not impeded by contaminants that may accumulate in the locking mechanism arranged on the dirty side of the filter. The abutting element is configured to be arranged on the side of the filter cartridge opposite to the beam to firmly clamp the filter cartridge in place. Thus, when at least the rod and the beam are arranged on the clean side of the filter, the abutting element will be arranged on the dirty side of the filter. However, there is no need to replace or manipulate the abutting element. Advantageously, the abutting element does not include any components that are negatively affected by exposure to the dirty air flow. As mentioned above, the abutting element can be a smooth flange of the base plate or a smooth portion of the frame of the filter housing.

[0034] According to a second aspect, there is provided a filter housing that includes a locking mechanism for locking and releasing a filter cartridge arranged in the filter housing as disclosed herein.

[0035] According to a third aspect, a dehumidifying device is provided, the dehumidifying device including a filter housing as disclosed herein, the filter housing including a locking mechanism as disclosed herein. The dehumidifying device may include a gas adsorption rotor. Thus, an air stream passes through a filter cartridge disposed in the filter housing and firmly locked in place by the locking mechanism and is pre-treated before passing through the gas adsorption rotor. The gas adsorption rotor may be a desiccant rotor.

[0036] The effects and features of the second and third aspects are largely similar to those described above in connection with the first aspect. The examples mentioned in connection with the first aspect are largely compatible with the second and third aspects.

[0037] The present invention will become readily understood from the following detailed description given herein. The detailed description and specific examples disclose only the preferred embodiments of the present invention by way of illustration. Those skilled in the art will understand from the guidance of the detailed description that changes and modifications can be made within the scope of the present invention.

[0038] Therefore, it should be understood that the invention disclosed herein is not limited to the specific component parts of the devices described or the steps of the methods described, as such devices and methods can vary. It should also be understood that the terms used herein are for the purpose of describing particular embodiments only and are not intended to be restrictive. It should be noted that, as used in the specification and the appended claims, unless the context clearly indicates otherwise, the articles "a", "an", "the" and "said" are intended to mean the presence of one or more of the elements. Thus, for example, reference to "a unit" or "the unit" can include several devices and the like. In addition, the words "comprising", "including", "containing" and similar words do not exclude other elements or steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and other objects, features and advantages of the present solution will be more fully understood from the following illustrative and non-limiting detailed description of example embodiments of the present invention when considered in conjunction with the accompanying drawings.

[0040] Figure 1 A perspective view of an exemplary filter housing is shown.

[0041] Figure 2 A plan view of a locking mechanism according to an example of the present invention is shown.

[0042] Figure 3A and Figure 3B A cross-sectional view of a locking mechanism according to an example of the present invention is shown.

[0043] Figure 4A andFigure 4B A perspective view of a locking mechanism according to an example of the present invention is shown.

[0044] Figure 5A and Figure 5B A perspective view of a locking mechanism according to an example of the present invention is shown.

[0045] Figures 6A to 6C A schematic view of a locking mechanism according to an example of the present invention is shown.

[0046] Figure 7 An exploded view of a locking mechanism according to an example of the present invention is shown.

[0047] Figure 8 A perspective view of a filter housing and a dehumidifying device according to an example of the present invention is shown. Detailed Description

[0048] The solution proposed herein will now be described with reference to the accompanying drawings, in which preferred example embodiments of the present invention are shown. However, the present invention may be embodied in other forms and should not be construed as limited to the embodiments disclosed herein. The disclosed embodiments are provided to fully convey the scope of the present invention to those skilled in the art.

[0049] Figure 1 A perspective view of an exemplary filter housing 11 is shown. The filter cartridge 10 is at least partially enclosed in the filter housing 11. The filter housing 11 may include a locking mechanism 1 as disclosed herein.

[0050] Figure 2 A plan view of a locking mechanism 1 according to an example of the present invention is shown. The locking mechanism 1 includes: an elongate beam 2 configured to be disposed at a first side portion 10a of the filter cartridge 10; an abutting element 3 configured to be disposed at an opposite second side portion 10b of the filter cartridge 10; and a rod 4 having a longitudinal axis L and a first connection point C1 and a second connection point C2 disposed along the longitudinal axis L. The rod 4 is connected to the beam 2 at the first connection point C1 and is rotatable about a rotation axis A at the second connection point C2. The locking mechanism 1 is configured such that rotation of the rod 4 about the rotation axis A in a first direction D1 causes the beam 2 to move from an open position to a locked position, in which the beam 2 clamps the filter cartridge 10 against the abutting element 3. Rotation of the rod 4 about the rotation axis A in a second direction D2 opposite to the first direction D1 causes the beam 2 to move from the locked position to the open position, in which the filter cartridge 10 is released from the clamping force of the beam 2. In the open position, a suitable distance is created between the beam 2 and the filter cartridge 10 sufficient to allow removal of the filter cartridge 10.

[0051] Thus, the rotation of the rod 4 causes an angular displacement of the rod 4, which can be represented by the degree of rotation, e.g., represented by a certain angle. In Figure 2 the degree of angular displacement caused by the rotation of the rod 4 in the first direction D1, which is the locking direction, is illustrated by the angle α. The degree of angular displacement caused by the rotation of the rod in the second direction D2, which is opposite to the first direction D1, is illustrated by the angle β.

[0052] The locking mechanism 1 may include one or more fastening members 7 arranged to be rotatable about respective axes A' and A". Such fastening members contribute to the uniform distribution of the load on the filter cartridge 10. Although Figure 2 the example in

[0053] Figure 3A shows two fastening members 7, the locking mechanism 1 may include fewer or more fastening members, depending on what the filter cartridge 10 to be locked in place is suitable for. For example, a larger filter cartridge 10 may be equipped with more than two fastening members 7 for increased stability. Conversely, a relatively small filter cartridge 10 may require only one fastening member 7 or no fastening member 7 at all. Figure 3B and Figure 3A show a cross-sectional view of the locking mechanism 1 according to an example of the present invention. In Figure 3A the locking mechanism 1 is in the open position. As can be seen in Figure 3B in the open position, a distance is created between the beam 2 and the filter cartridge 10, specifically between the first side portion 10a of the filter cartridge 10 and the beam 2. In Figure 3A the locking mechanism 1 is in the locked position. The rotation of the rod 4 about the rotation axis A in the first direction D1 causes the beam 2 to move from the open position shown in Figure 3B to the locked position shown in

[0054] wherein the beam 2 clamps the filter cartridge 10 against the abutting element 3. Figure 3B The elongated beam 2 advantageously includes a first surface 21 and a second surface 22. When the locking device 1 is in the locked position, the first surface 21 of the beam 2 faces the filter cartridge 10 and contacts the filter cartridge 10, as shown in

[0055] The second surface 22 of the beam 2 faces away from the filter cartridge 10. The beam 2 may also include a top surface 23 connecting the first surface 21 and the second surface 22. Although not shown in the figures, depending on the configuration of the beam 2, the beam 2 may also have a bottom surface opposite to the top surface 23. Figure 3A and Figure 3BThe beam 2 shown in [figure] has a U-shaped cross-section, which includes two flanges and a central member. Each flange may include or correspond to a first surface 21 or a second surface 22, and the central member may include or correspond to a top surface 23. The flange corresponding to or including the first surface 21 of the beam 2 abuts against the first side portion 10a of the filter cartridge 10.

[0056] The locking mechanism 1 may include a base plate 5, as Figure 3A and Figure 3B shown in [figure]. In such an example, the beam 2 rests on the base plate 5 and the rod 4 is rotatably connected to the base plate 5 at a second connection point C2. When the rod 4 rotates about the rotation axis A, the beam 2 moves on the base plate 5. Thus, the rod 4 is connected to the beam 2 at a first connection point C1 and to the base plate 5 at a second connection point C2.

[0057] The abutting element 3 may be arranged on the base plate 5. Additionally or alternatively, the abutting element 3 may be a flange of the base plate 5. In Figure 3A and Figure 3B the example shown in [figure], the abutting element 3 is part of a frame 11b arranged in the filter housing 11. The abutting element 3 is advantageously smooth, thereby providing a flat contact surface against the second side portion 10b of the filter cartridge 10.

[0058] Figure 3A and Figure 3B Also illustrated is the extension of the longitudinal axis l of the rod and the rotation axis A.

[0059] Figure 4A and Figure 4B show a perspective view of the locking mechanism according to an example of the present invention. In Figure 4A , the locking mechanism is in the open position. In Figure 4B , the locking mechanism is in the locked position. The rotation of the rod 4 about the rotation axis A in a first direction moves the beam 2 from Figure 4A the open position shown in [figure] to Figure 4B the locked position shown in [figure], in which the beam 2 clamps the filter cartridge 10 against the abutting element 3. Conversely, the rotation of the rod 4 about the rotation axis A in a second direction D2 moves the beam 2 from Figure 4B the locked position shown in [figure] to Figure 4A the open position shown in [figure].

[0060] In Figure 4A and Figure 4B , the beam 2 rests on the base plate 5.

[0061] Figure 4A and Figure 4BAlso illustrated is the extension of the longitudinal axis L of the rod 4 and the extension of the transverse axis S of the elongated beam 2. Rotation of the rod 4 linearly displaces the beam 2 but does not cause any rotation of the beam 2. The rod 4 rotates about the axis of rotation A at the second connection point C2. When the rod 4 rotates about the axis of rotation A, the first connection point C1 connecting the rod 4 and the beam 2 is angularly displaced, thereby causing the beam 2 to move in response to the rotation of the rod 4.

[0062] As Figure 4A and Figure 4B shown in, the beam 2 may have a U-shaped cross-section, which includes two flanges and a central member. The flanges may each include a first surface 21 or a second surface 22 or correspond to the first surface 21 or the second surface 22, and the central member may include a top surface 23 or correspond to the top surface 23. The flange corresponding to the first surface 21 of the beam 2 or including the first surface 21 of the beam 2 abuts against the first side portion 10a of the filter cartridge 10. The first connection point C1 is arranged at the top surface 23 of the beam 2, and the top surface 23 is shown as the central member of the U-shaped beam 2 in Figure 4B in.

[0063] Figure 5A and Figure 5B show a perspective view of the locking mechanism 1 according to an example of the present invention. In Figure 5A , the locking mechanism 1 is in the open position. In Figure 5B , the locking mechanism 1 is in the locked position. In the example shown, the rod 4 includes an elongated central portion 41, an elongated first outer portion 42, and an elongated second outer portion 43. The central portion 41 includes a first connection point C1 and a second connection point C2. The elongated central portion 41 has a longitudinal axis L1 extending along the longitudinal axis L of the rod 4. In other words, the longitudinal axis L1 is parallel to the longitudinal axis L of the rod. In the example shown in Figure 5A and Figure 5B , the longitudinal axis L1 of the central portion 41 coincides with the longitudinal axis L of the rod 4. The central portion 41 has a transverse axis L2 extending substantially perpendicular to its longitudinal axis L1. The first outer portion 42 and the second outer portion 43 have respective longitudinal axes L1', L1", and they each extend along opposite side portions of the central portion 41. The respective longitudinal axes L1' and L1" are parallel to the longitudinal axis L1 of the central portion 41. The first outer portion 42 and the second outer portion 43 have respective transverse axes L2', L2" extending from the central portion 41 in a direction substantially perpendicular to the longitudinal axis L1 of the central portion 41. It can be said that the first outer portion 42 and the second outer portion 43 project from the central portion 41. In Figure 5A and Figure 5BIn the example shown, the first outer portion 42 and the second outer portion 43 project from the central portion 41 in the direction towards the base plate 5, and the base plate 5 extends substantially perpendicular to the longitudinal extension of the central portion 41.

[0064] The first outer portion 42 of the rod 4 can be arranged to limit the rotation of the rod 4 in the first direction D1, and the second outer portion 43 is arranged to limit the rotation of the rod 4 in the second direction D2 opposite to the first direction D1. Figure 5A and Figure 5B The beam 2 in is a U-shaped beam having two protruding flanges and a central member. The protruding flanges correspond to the first surface 21 and the second surface 22 of the beam 2 respectively. The central member corresponds to the top surface 23 of the beam 2. When the first outer portion 42 or the second outer portion 43 abuts against the second surface 22 of the beam 2, that is Figure 5A and Figure 5B one of the flanges of the U-shaped beam 2 in, the first outer portion 42 and the second outer portion 43 of the rod 4 limit the movement of the rod 4 in the first direction D1 or the second direction D2. Although Figure 5A and Figure 5B the example in shows a U-shaped beam, the beam 2 can have any suitable shape as long as one of the surfaces of the beam is configured to rest against the filter cartridge 10 in the locked position.

[0065] In Figure 5A the locking mechanism 1 is in the open position. The rod has been rotated in the second direction D2 to reach the open position. The rod has been angularly displaced to the extent indicated by the angle β in Figure 5A The angle β generated by the rotation in the second direction D2 opposite to the first direction D1 which is the locking direction can also be referred to as the negative angle β. As shown in the example, when the rod 4 rotates in the second direction D2, the rod 4 reaches the final position when the edge of the second outer portion 43 abuts against the beam 2, specifically against the second surface 22 of the beam 2. In this final rotational position, the beam 2 prevents any further rotation of the rod 4 in the second direction D2 because the second outer portion 43 cannot be further displaced. Due to the arrangement of the axis of rotation at the second connection point C2 and the connection between the beam 2 and the rod 4 at the first connection point C1, pressing the rod 4 more forcefully in the second direction D2 will not move the beam 2. Therefore, the rod 4 and the beam 2 are restricted from any further movement in the second direction D2.

[0066] In Figure 5B the locking mechanism 1 is in the locked position. The rod 4 has been rotated in the first direction D1 to reach the locked position. The rod has been angularly displaced to the extent indicated by Figure 5AThe degree represented by the angle α therein. The angle α generated by rotation in the first direction D1 opposite to the locking direction can also be referred to as the positive angle α. As shown in the example, when the rod 4 rotates in the first direction D1, the rod 4 reaches its final position when the edge of the first outer portion 42 abuts against the beam 2, specifically against the second surface 22 of the beam 2. At this final rotational position, the beam 2 prevents any further rotation of the rod 4 in the first direction D1 because the first outer portion 42 cannot be further displaced. Due to the arrangement of the axis of rotation at the second connection point C2 and the connection between the beam 2 and the rod at the first connection point C1, pressing the rod 4 more forcefully in the first direction will not move the beam 2. Thus, when the first outer portion 42 abuts against the beam 2, the rod 4 and the beam 2 are restricted from any further movement in the first direction D1. In addition, the force exerted by the filter cartridge 10 on the beam 2 will not cause the beam 2 to be further displaced away from the filter cartridge 10. Therefore, the holding strength of the locking mechanism 1 is further enhanced, which helps to firmly hold the filter cartridge 10 in place even during operation.

[0067] Therefore, in Figure 5A and Figure 5B In the example shown, the rotational displacement of the rod 4 is restricted due to the arrangement of the first outer portion 42 and the second outer portion 43 of the rod 4. This connection between the beam 2 and the rod 4 that limits the angular displacement to a predetermined degree can be referred to as an elbow joint.

[0068] Figures 6A to 6C Fig. shows a schematic top view of the locking mechanism 1 according to an example of the present invention, the locking mechanism 1 including a rod 4 and a beam 2 connected at a first connection point C1 (having a first outer portion 42 and a second outer portion 43). In Figures 6A to 6C the first side portion 10a of the filter cartridge faces the beam 2.

[0069] Figures 6A to 6C Fig. illustrates the path along which the first connection point C1 of the rod 4 moves in response to the rotation of the rod 4 about the axis of rotation A. This path can be a substantially circular path P, as Figures 6A to 6C illustrated in. The rotation of the rod 4 about the axis of rotation A thus causes the first connection point C1 of the rod 4 to be displaced along the circular path P. As Figure 6A shown in, when the first connection point C1 and the second connection point C2 of the rod 4 are aligned with the transverse axis S of the beam 2, the first connection point C1 reaches the apex of the circular path P. This position of the rod 4 can be referred to as an intermediate position between the open position and the locked position. When the first connection point C1 and the second connection point C2 of the rod 4 are aligned with the transverse axis S of the beam, the longitudinal axis L of the rod 4 is parallel to the transverse axis S of the beam.

[0070] In Figure 6BIn the example shown, when the rotation of the rod 4 about the axis of rotation A in the first direction D1 causes the beam 2 to move from the open position or the intermediate position to the locked position, the first connection point C1 is displaced in the first direction D1 beyond the vertex of the circular path P. Thus, in the locked position, a positive angle α is formed between the longitudinal axis L of the rod 4 and the transverse axis S of the beam. In the locked position, the positive angle α can advantageously be in the range from 1 degree to 20 degrees or from 1 degree to 15 degrees. Advantageously, in the locked position, the positive angle α is approximately 10 degrees. The allowable angle of rotation of the rod 4 in the first direction D1 can be adjusted based on the configuration of the rod 4, for example, by changing the distance D3 between the first connection point C1 at which the rod is attached to the beam 2 and the upper edge of the first outer portion 42 of the rod 4. Within the scope of the present invention, various distances D3 can be envisaged based on factors such as the configuration of the filter cartridge 10 to be clamped. Advantageously, the distance D3 between the first connection point C1 and the first outer portion 42 is in the range from 15 mm to 22 mm, preferably 18 mm. In other words, the distance D3 from the center point of the first connection point C1 to the upper edge of the first outer portion 42, which abuts against the beam 2 and thus limits the movement of the rod 4, is preferably in the range from 15 mm to 22 mm, most preferably 18 mm. When the first connection point C1 has been displaced in the first direction D1 beyond the vertex of the circular path P, any force exerted on the beam from the filter cartridge 10 will push the rod 4 in the first direction D1, thereby further fixing the filter cartridge 10.

[0071] In Figure 6C the example shown, when the rotation of the rod 4 about the axis of rotation A in the second direction D2 causes the beam 2 to move from the locked position to the open position, the first connection point C1 is displaced in the second direction D2 beyond the vertex of the circular path P. Thus, in the open position, a negative angle β is formed between the longitudinal axis L of the rod 4 and the transverse axis S of the beam. In the open position, the negative angle β can advantageously be in the range from -1 degree to -80 degrees. In the open position, the filter cartridge 10 is released, i.e., no pressure is exerted on the filter cartridge 10 from the beam 2, and thus the filter cartridge 10 can be removed.

[0072] Although Figures 6A to 6C the first direction D1 is shown as the clockwise direction and D2 is shown as the counterclockwise direction, these directions can be reversed to suit the arrangement of the locking mechanism 1 in the filter housing 11. Additionally, the direction, i.e., clockwise or counterclockwise, will depend on the perspective from which the locking mechanism 1 is observed.

[0073] Figure 7 shows an exploded view of the locking mechanism according to an example of the present invention. In Figure 7In the example shown, the rod 4 includes an attachment member 45 and a handle 44 that are connected at a first connection point C1 and a second connection point C2. The rod 4 can rotate about a bolt 6 at a rotation axis A. The bolt 6 can also be used to connect the attachment member 45 and the handle 44 of the rod 4. Although Figure 7 it is shown that the rod 4 rotates about the bolt 6, any suitable fastener or rotating device can be used to connect the components of the rod 4 and / or provide an element about which the rod 4 can rotate. In Figure 7 the example shown, the attachment member 45 includes a central portion 41, a first outer portion 42, and a second outer portion 43.

[0074] Figure 7 An example of a base plate is also illustrated, on which the beam 2 and the rod 4 can be arranged.

[0075] Figure 8 A perspective view of a filter housing 11 in a dehumidifying device 100 according to an example of the present invention is shown. The device 100 includes the filter housing 11 disclosed herein, and the filter housing 11 in turn includes a filter cartridge 10 and a locking mechanism 1. In Figure 8 the example shown, at least the rod 4 and the beam 2 of the locking mechanism 1 are arranged downstream of the air flow passing through the filter cartridge 10 on the clean side of the filter cartridge 10. Thus, the locking mechanism 1 is mainly arranged downstream of the air flow passing through the filter cartridge 10 inside the filter housing 11. Accordingly, the components of the locking mechanism 1 that are manipulated to lock or release the filter cartridge 10 are arranged on the clean side of the filter cartridge 10.

[0076] As in Figure 8 the example shown, the dehumidifying device 100 can include a gas adsorption rotor 101. Thus, the air flow passes through the filter cartridge 10 and is pre-treated before passing through the gas adsorption rotor 101.

[0077] Those skilled in the art recognize that the present invention is not limited to the above preferred embodiments. Those skilled in the art also recognize that various modifications and variations within the scope of the appended claims are possible.

Claims

1. A locking mechanism (1), the locking mechanism (1) being used to lock and release a filter box (10) in a filter housing (11), characterized in that: The locking mechanism (1) comprises: - an elongated beam (2), the beam (2) being configured to be arranged at a first side (10a) of the filter box (10); - an abutment element (3) configured to be arranged at an opposite second side (10b) of the filter box (10); and - a rod (4) having a longitudinal axis (L) and a first connection point (C1) and a second connection point (C2) arranged along the longitudinal axis (L), the rod (4) being connected to the beam (2) at the first connection point (C1) and being rotatable about a rotation axis (A) at the second connection point (C2); wherein, - the locking mechanism (1) is configured such that rotation of the lever (4) about the rotation axis (A) in a first direction (D1) moves the beam (2) from an open position to a locked position in which the beam (2) clamps the filter box (10) against the abutment element (3).

2. The locking mechanism (1) according to claim 1, characterized in that: The locking mechanism (1) further comprises a base plate (5), wherein the beam (2) rests on the base plate (5) and the rod (4) is rotatably connected to the base plate (5) at the second connection point (C2), so that the beam (2) moves on the base plate (5) when the rod (4) rotates around the rotation axis (A).

3. The locking mechanism (1) according to claim 1 or 2, characterized in that: The rod comprises: - an elongated central portion (41) having a longitudinal axis extending along the longitudinal axis (L) of the rod (4) and a transverse axis extending substantially perpendicularly to the longitudinal axis of the central portion (41), the central portion (41) comprising the first connection point (C1) and the second connection point (C2), and - a first lateral portion (42) and a second lateral portion (43), each of which extends along opposite sides of the central portion (41), and each of which has a corresponding longitudinal axis parallel to the longitudinal axis of the central portion (41) and has a corresponding transverse axis extending from the central portion (41) in a direction substantially perpendicular to the longitudinal axis of the central portion (41).

4. The locking mechanism (1) according to claim 3, characterized in that: The first outer portion (42) of the rod (4) is arranged to limit the rotation of the rod (4) in the first direction (D1), and the second outer portion (43) is arranged to limit the rotation of the rod (4) in a second direction (D2) opposite to the first direction (D1).

5. The locking mechanism (1) according to claim 4, characterized in that: A distance (D3) between the first connection point (C1) and the first outer portion (42) is in the range of 15 mm to 22 mm.

6. The locking mechanism (1) according to claim 5, characterized in that: The distance (D3) between the first connection point (C1) and the first outer portion (42) is 18 mm.

7. The locking mechanism (1) according to claim 4, characterized in that: The rotation of the rod (4) about the rotation axis (A) causes the first connection point (C1) of the rod (4) to shift along a circular path (P) so that when the first connection point (C1) and the second connection point (C2) of the rod (4) are aligned with the transverse axis (S) of the beam, the first connection point (C1) reaches the vertex of the circular path (P).

8. The locking mechanism (1) according to claim 7, characterized in that: When the rotation of the rod (4) about the rotation axis (A) in the first direction moves the beam (2) from the open position to the locked position, the first connection point (C1) is displaced in the first direction beyond the vertex of the circular path (P), so that in the locked position a positive angle (α) is formed between the longitudinal axis (L) of the rod (4) and the transverse axis (S) of the beam.

9. The locking mechanism (1) according to claim 8, characterized in that: In the locked position, the positive angle (α) is in the range of 1 degree to 20 degrees.

10. The locking mechanism (1) according to claim 9, characterized in that: In the locked position, the positive angle (α) is in the range of 1 degree to 15 degrees.

11. The locking mechanism (1) according to claim 10, characterized in that: In the locked position, the positive angle (α) is approximately 10 degrees.

12. The locking mechanism (1) according to any one of claims 7 to 11, characterized in that: When the rotation of the rod (4) about the rotation axis (A) in the second direction moves the beam (2) from the locked position to the open position, the first connection point (C1) moves in the second direction beyond the vertex of the circular path (P), so that in the open position a negative angle (β) is formed between the longitudinal axis (L) of the rod (4) and the transverse axis (S) of the beam (2).

13. The locking mechanism (1) according to claim 12, characterized in that: In the open position, the negative angle (β) is in the range of -1 degree to -80 degrees.

14. The locking mechanism (1) according to claim 1 or 2, characterized in that: The rod (4) comprises an attachment member (45) and a handle (44) connected at the first connection point (C1) and the second connection point (C2).

15. The locking mechanism (1) according to claim 14, characterized in that The rod (4) rotates about a bolt (6) at the rotation axis (A), the bolt (6) connecting the attachment part (45) of the rod (4) and the handle (44).

16. The locking mechanism (1) according to claim 1 or 2, characterized in that: At least the rod (4) and the beam (2) are configured to be arranged downstream of an air flow through the filter box (10) on a clean side of the filter box (10).

17. A filter housing (11), characterized in that: The filter housing (11) comprises a locking mechanism (1) according to any one of claims 1 to 16, the locking mechanism (1) being used for locking and releasing a filter cassette (10) arranged in the filter housing (11).

18. A dehumidification device (100), characterized in that: The dehumidification device (100) comprises a filter housing (11) according to claim 17.

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