Filtering device, heat exchanger and air conditioner

Abstract

The application discloses a filtering device, a heat exchanger and an air conditioner, which comprise at least two filtering screens arranged in sequence along a fluid flow direction and a spacing adjusting device for controlling the spacing between adjacent filtering screens; the filtering screens have strip-shaped filtering holes, and the length directions of the filtering holes of adjacent filtering screens cross each other. The filtering holes of the two filtering screens are staggered and the spacing is adjustable; when the spacing between the two filtering screens is increased, the spacing between the filtering holes of the two filtering screens is also increased, so that the blocking objects stuck between the two filtering holes can fall off, the filtering screens are prevented from being blocked, and frequent cleaning is avoided.

Description

Technical Field

[0001] This invention relates to the field of filtration technology, and particularly to filtration devices, heat exchangers, and air conditioners. Background Technology

[0002] A filter device is an assembly used to filter impurities. Its purpose is to prevent impurities from entering the system and affecting the system's internal cleanliness and operation. Air filter devices are mainly used to prevent impurities from entering the system under the action of flowing air, ensuring the cleanliness of the system, preventing impurities from clogging internal heat exchangers, or preventing impurities from entering areas requiring hot or cold air.

[0003] Currently, commercial air conditioning unit filters are generally difficult to disassemble and install, and require multiple bolts for fastening. This is especially true in harsh environments such as outdoors, factories, and mines, where the air contains many impurities, making the filters prone to clogging and requiring frequent cleaning.

[0004] Therefore, how to prevent filter clogging has become a technical problem that the industry urgently needs to solve. Summary of the Invention

[0005] To solve the problem of filter clogging, this invention proposes a filtration device in which the spacing between adjacent filter screens can be adjusted, thereby adjusting the size of the filter holes, so that the blockage can be automatically dislodged, preventing the filter screen from becoming clogged and avoiding frequent cleaning.

[0006] The technical solution adopted in this invention is to design a filtration device, comprising: at least two filter screens arranged sequentially along the fluid flow direction, and a spacing adjustment device for controlling the spacing between adjacent filter screens; the filter screens have strip-shaped filter holes, and the length directions of the filter holes of adjacent filter screens intersect each other.

[0007] In some embodiments, the spacing adjustment device includes: a spring return member supported between adjacent filter screens, a variable-pitch clamp, and a movement control device, wherein at least two opposite sides of the adjacent filter screens are simultaneously clamped in the wedge-shaped jaws of the variable-pitch clamp, and the variable-pitch clamp is controlled by the movement control device to move relative to the filter screens.

[0008] In some embodiments, an elastic reset member is provided between the pitch clamp and the filter screen, and the movement control device is a first electromagnet capable of attracting the pitch clamp to move.

[0009] In some embodiments, the pitch clamp is magnetic, and the movement control device is a first electromagnet capable of attracting the pitch clamp to move.

[0010] In some embodiments, a fixing frame is also included, the inner side of which is provided with a groove corresponding to the side of the filter screen, and the side of the filter screen holding the variable-pitch clamp is located in the groove.

[0011] In some embodiments, a filter channel for mounting the filter screen is also included, the filter channel having a slot for the fixing frame to be inserted.

[0012] In some embodiments, the fixing frame is provided with guide balls that support the slot wall.

[0013] In some embodiments, a U-shaped handle is also included, with locking heads at both ends of the U-shaped handle. The fixed frame is provided with a storage groove for accommodating the U-shaped handle, and the fixed frame is provided with a sliding groove that cooperates with the locking heads. The locking heads slide along the sliding groove to allow the U-shaped handle to enter or leave the storage groove. The sliding groove is a wedge-shaped groove that is wide at one end and narrow at the other end, so that after the U-shaped handle enters the storage groove, the locking heads can be locked at the narrow end of the sliding groove.

[0014] In some embodiments, the fixed frame is provided with a clip head that extends and retracts relative to the fixed frame, and the filter channel is provided with a slot corresponding to the clip head.

[0015] In some embodiments, a second electromagnet corresponding to the card head is also included, the card head comprising a material that can be attracted by a magnet, the magnetic force of the second electromagnet being used to pull the card head out of the card slot.

[0016] In some embodiments, a pressure detection device is also included for detecting the pressure difference before and after the filter device; the spacing adjustment device controls the spacing of the filter screen according to the detection result of the pressure detection device.

[0017] Heat exchangers, including the aforementioned filtration devices.

[0018] Air conditioning, including the heat exchanger mentioned above.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The filter holes of the two filter screens of the present invention are staggered and the spacing is adjustable. When the spacing between the two filter screens is increased, the spacing between the filter holes of the two filter screens can also be increased, which is conducive to the falling off of the blockage stuck between the two filter holes, preventing the filter screen from being blocked and avoiding frequent cleaning.

[0021] 2. When the distance between the two filter screens becomes smaller, the whole thing is equivalent to a filter screen with rectangular filter holes, which is beneficial for filtering the airflow and preventing impurities from entering the heat exchanger.

[0022] 3. The fixed frame of the present invention is provided with a clip head that extends and retracts relative to the fixed frame, and the filter channel is provided with a slot corresponding to the clip head. By controlling the extension and retraction of the clip head, the filter screen can be installed and removed.

[0023] 4. The U-shaped handle of this invention has a retractable structure, which can be pulled out when needed and retracted into the storage slot when not in use. The structure is simple and easy to use. Attached Figure Description

[0024] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings. To illustrate the details and facilitate understanding of its principles, the drawings are not necessarily to scale, and similar reference numerals may describe similar components in different views. The accompanying drawings generally illustrate the embodiments discussed herein by way of example and not limitation. Wherein:

[0025] Figure 1 This is a schematic diagram of one of the filters.

[0026] Figure 2 This is a diagram of another filter.

[0027] Figure 3 This is a diagram showing two filters arranged side by side.

[0028] Figure 4 This is a schematic diagram of a filter screen equipped with a variable-pitch clamp.

[0029] Figure 5 This is a diagram showing the filter screen mounted on a fixed frame.

[0030] Figure 6 yes Figure 5 A schematic diagram of the AA section.

[0031] Figure 7 yes Figure 6 A schematic diagram of the BB cross section.

[0032] Figure 8 Yes Figure 6 The diagram shows the effect of the variable-pitch clamp increasing the distance between the two filter screens.

[0033] Figure 9 This is a diagram of a ventilation opening.

[0034] Figure 10 This is a diagram showing the filter screen installed behind the vent.

[0035] Figure 11 yes Figure 10 A diagram showing the view from below.

[0036] Figure 12 yes Figure 11 An enlarged schematic diagram of point C.

[0037] Figure 13 yes Figure 12 A diagram showing the U-shaped handle being pulled outwards.

[0038] Figure 14 yes Figure 12 Schematic diagram of the DD cross section.

[0039] Figure 15 yes Figure 14 A schematic diagram of the EE cross section.

[0040] Figure 16 This is a partial cross-sectional diagram showing the fit between the clip on the fixed frame and the fixed frame of the ventilation opening.

[0041] Figure 17 This is a schematic diagram of Example 2.

[0042] In the diagram, 1 is a vent; 101 is a slot; 102 is a card slot; 103 is a storage slot; 1031 is a slide; 2 is a filter screen; 201 is a filter hole; 3 is a variable pitch clamp; 4 is a cylindrical spring; 5 is a first electromagnet; 6 is a differential pressure switch; 7 is a fixing frame; 701 is a first groove; 702 is a second groove; 8 is a guide ball; 9 is a first locking head; 10 is a second electromagnet; 11 is a U-shaped handle; 111 is a second locking head; 12 is a second return spring; and 13 is a first return spring. Detailed Implementation

[0043] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments, and the following embodiments do not limit the invention covered by the claims. Furthermore, not all combinations of the features described in the embodiments are necessary for the inventive solution.

[0044] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0045] Example 1

[0046] like Figure 1 , 2As shown in Figure 3, a filtration device is described in this embodiment, taking a filtration device applied to the vent 1 of the outdoor heat exchanger of an air conditioning unit as an example. The filtration device includes at least two filter screens 2 arranged sequentially along the airflow filtration direction. In this embodiment, there are two filter screens. Each filter screen 2 has a rectangular fixed frame. Each filter screen 2 has strip-shaped filter holes 201. The length directions of the filter holes 201 of adjacent filter screens 2 intersect each other, that is, the length directions of the filter holes 201 of the two filter screens 2 are not parallel. In this embodiment, the length directions of the filter holes 201 of the two filter screens 2 are nearly perpendicular to each other. The two filter screens 2 are arranged side by side in the filtration direction, which is equivalent to forming a filter screen 2 with rectangular holes in the airflow direction. The width of the rectangular holes is determined by the width of the filter holes 201 on the two filter screens 2. That is, the length of the rectangular holes is determined by the width of the filter holes 201 of one filter screen 2, and the width of the rectangular holes is determined by the width of the filter holes 201 of the other filter screen 2. In this embodiment, the width of the filter holes 201 on the two filter screens 2 is the same, so the rectangular holes become nearly square holes, which is beneficial for filtering impurities. Of course, the strip-shaped filter hole 201 is not limited to the straight strip-shaped filter hole 201 shown in the attached figure of this embodiment, but also includes various possible shapes of filter holes 201 such as arc shape, which can change the filter size after the two filter holes 201 are combined.

[0047] A single filter screen 2 has elongated holes and cannot block impurities, which can pass through directly. However, when two filter screens 2 are combined, they will form small filter holes 201 by interlacing. At the same time, the spacing between the filter screens 2 must be small to form small filter holes 201 to ensure that impurities can be filtered.

[0048] It also includes a spacing adjustment device for controlling the spacing between adjacent filter screens 2, so as to control the spacing between the two filter screens 2. When the spacing between the two filter screens 2 is increased, the spacing between the filter holes 201 of the two filter screens 2 can also be increased, which is conducive to the dislodgement of blockages stuck between the two filter holes 201. When the spacing between the two filter screens 2 is decreased, the spacing between the filter holes 201 of the two filter screens 2 becomes smaller, which is equivalent to a filter screen 2 with rectangular filter holes 201, which is conducive to the filtration of airflow and prevents impurities from entering the heat exchanger.

[0049] like Figure 4As shown, the spacing adjustment device includes a spring return member and a variable-pitch clamp 3 supported between adjacent filter screens 2. In this embodiment, the spring return member is a cylindrical spring 4. The variable-pitch clamp 3 has a wedge-shaped clamping opening, that is, the clamping opening gradually decreases from the opening to the root of the clamping opening. At least two opposite sides of adjacent filter screens 2 are simultaneously clamped in the wedge-shaped clamping opening of the variable-pitch clamp 3. In this embodiment, the left sides of the two filter screens 2 are simultaneously clamped in the left variable-pitch clamp 3, and the right sides of the two filter screens 2 are simultaneously clamped in the right variable-pitch clamp 3. The variable-pitch clamp 3 is controlled by a movement control device to move relative to the filter screens 2, so that the sides of the filter screens 2 are clamped in different parts of the clamping opening. Under the support force of the cylindrical spring 4, the distance between the two filter screens 2 changes accordingly.

[0050] The movement control device is a first electromagnet 5 that can attract the movement of the variable pitch clamp 3. The variable pitch clamp 3 is magnetic. For example, a magnet can be fixed on the variable pitch clamp 3. The first electromagnet 5 can attract or repel the magnet, thereby controlling the movement of the variable pitch clamp 3.

[0051] The system also includes a pressure detection device for detecting the pressure difference across the filter. In this embodiment, a differential pressure switch 6 is installed before and after the filter screen 2 to detect the pressure difference. When the pressure difference is small, it indicates that the filter screen 2 is not heavily clogged, and the filter screen 2 device can be used normally. At this time, the first electromagnet 5 generates a repulsive force relative to the variable-pitch clamp 3, causing the variable-pitch clamp 3 to move towards the filter screen 2, thereby making the distance between the two filter screens 2 small enough for better filtration of impurities. When the pressure difference exceeds a certain value, it indicates that the filter screen is heavily clogged and needs to be cleaned. At this time, the first electromagnet 5 is controlled to generate an attractive force relative to the variable-pitch clamp 3, causing the variable-pitch clamp 3 to move away from the filter screen 2, thereby increasing the distance between the two filter screens 2 so that the impurities clogging the filter screen 2 can fall off. To make the blockage fall off more effectively, the first electromagnet 5 can be controlled to generate alternating attractive and repulsive forces on the variable-pitch clamp 3, causing the variable-pitch clamp 3 to make rapid reciprocating motion relative to the filter screen 2, which is equivalent to causing the filter screen 2 to vibrate, thereby quickly and effectively removing the blockage.

[0052] like Figure 5 , 6As shown in Figures 7 and 8, this embodiment also includes a fixing frame 7. The filter screen 2 is fitted inside the fixing frame 7, and the fixing frame 7 fixes the filter screen 2. The inner sides of the left and right frames of the fixing frame 7 are provided with first grooves 701 corresponding to the sides of the filter screen 2. The sides of the filter screen 2 holding the variable pitch clamp 3 are located in the first grooves 701, thereby restricting the forward and backward movement of the filter screen 2 within the first grooves 701, so that the variable pitch clamp 3 can also move under the guidance of the grooves. The first electromagnet 5 can be arranged on the fixing frame 7 in a position corresponding to the variable pitch clamp 3.

[0053] like Figure 9 , 10 As shown in Figure 11, the system also includes a filter channel for installing the filter screen 2. In this embodiment, this is the vent 1 of the heat exchanger. The vent 1 has slots 101 on both sides for the fixing frame 7 to insert into. The fixing frame 7 inserts into the slots 101 to install the filter screen 2 onto the vent 1. The fixing frame is provided with guide balls 8 that support the walls of the slots 101, thereby reducing friction and facilitating installation and removal.

[0054] The fixed frame 7 is provided with a first locking head 9 that extends and retracts relative to the fixed frame 7. In this embodiment, a second groove 702 is provided on the upper side of the fixed frame 7, and the first locking head 9 is provided in the second groove 702. The first locking head 9 and the second groove 702 are connected by a first return spring 13. The upper part of the first locking head 9 has a notch. In the natural state, the first return spring 13 makes the first locking head 9 slightly higher than the second groove 702. Correspondingly, a slot 102 corresponding to the first locking head 9 is provided on the upper part of the vent 1. When the fixed frame 7 is installed on the vent 1, the first locking head 9 is inserted into the slot 102, thereby fixing the fixed frame 7 relative to the vent 1.

[0055] like Figure 16 As shown, it also includes a second electromagnet 10 corresponding to the first clip 9. The first clip 9 includes a material that can be attracted by a magnet. The magnetic force of the second electromagnet 10 is used to pull the first clip 9 out of the slot 102, so that the first clip 9 overcomes the elastic force of the first return spring 13 and retracts into the second groove 702. Thus, the first clip 9 no longer has a locking function, so that the fixing frame 7 can be removed from the vent 1.

[0056] like Figure 12 , 13As shown in Figures 14 and 15, the system also includes a U-shaped handle 11, which is opposite to the first locking head 9. The U-shaped handle 11 is located on the lower side of the fixed frame 7. The U-shaped handle 11 has second locking heads 111 at both ends. The fixed frame has a storage groove 103 for accommodating the U-shaped handle 11. The fixed frame also has a sliding groove 1031 that cooperates with the second locking head 111. The second locking head 111 slides along the sliding groove 1031, allowing the U-shaped handle 11 to enter or leave the storage groove 103. The sliding groove 1031 is a wedge-shaped groove that is wide at one end and narrow at the other end, so that after the U-shaped handle 11 enters the storage groove 103, the second locking head 111 can be locked at the narrow end of the sliding groove 1031, thereby fixing the U-shaped handle 11 relative to the storage groove 103.

[0057] Heat exchangers, including the aforementioned filtration devices.

[0058] Air conditioning, including the heat exchanger mentioned above.

[0059] Example 2

[0060] like Figure 17 As shown, unlike the above embodiment, the variable pitch clip 3 is connected to the fixed frame 7 by a second return spring 12. The second return spring 12 keeps the variable pitch clip 3 clamped on the filter screen 2. At this time, the variable pitch clip 3 may not be magnetic, but only have the property of being attracted by a magnet. For example, its material is iron. Therefore, the electromagnet only attracts the variable pitch clip 3, that is, it only attracts the variable pitch clip 3 away from the filter screen 2. The second return spring 12 is used to keep the variable pitch clip 3 close to the filter screen 2, and to keep the filter screen 2 at a small distance.

[0061] Although this document uses a number of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention. The order of actions, steps, etc., in the apparatus and methods shown in the specification and drawings can be implemented in any order unless otherwise expressly specified, and provided that the output of a preceding process is not used in a subsequent process. Similar sequential terms used for descriptive convenience (e.g., "firstly," "next," "secondly," "again," "then," etc.) do not imply that the actions must be performed in such an order.

[0062] Those skilled in the art will understand that all directional references (e.g., above, below, up, up, down, down, top, bottom, left, right, vertical, horizontal, etc.) are used descriptively in the drawings to aid the reader's understanding and do not imply (e.g., a limitation on the scope of the invention as defined by the appended claims) a limitation on the scope of the invention as defined by the appended claims. They are merely for the purpose of facilitating the description of this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation. The directional terms "inside" and "outside" refer to inside or outside relative to the outline of the respective component itself.

[0063] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotation or other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0064] Additionally, some vague terms (e.g., substantially, certain, generally, etc.) may refer to slight inaccuracies or minor deviations in conditions, quantities, values, or dimensions, some of which are within manufacturing tolerances or limits. It should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components; unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0065] The specific embodiments described herein are merely illustrative examples illustrating the spirit of the invention. Those skilled in the art can make various modifications or additions to the described embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A filtration device, characterized in that, include: At least two filter screens arranged sequentially along the fluid flow direction, and a spacing adjustment device for controlling the spacing between adjacent filter screens; The filter screen has strip-shaped filter holes, and the length directions of the filter holes of adjacent filter screens intersect each other; The spacing adjustment device includes: a spring return member supported between adjacent filter screens, a variable-pitch clamp, and a movement control device. At least two opposite sides of adjacent filter screens are simultaneously clamped in the wedge-shaped jaws of the variable-pitch clamp. The variable-pitch clamp is controlled by the movement control device to move relative to the filter screens. An elastic return member is provided between the variable-pitch clamp and the filter screens. The movement control device is a first electromagnet capable of attracting the variable-pitch clamp to move. The variable-pitch clamp is magnetic. The device also includes a fixing frame with a groove corresponding to the side of the filter screen on its inner side. The side of the filter screen holding the variable-pitch clamp is located in the groove.

2. The filtration device according to claim 1, characterized in that, It also includes a filter channel for installing the filter screen, the filter channel having a slot for inserting the fixing frame.

3. The filtration device according to claim 2, characterized in that, The fixed frame is provided with guide balls that support the slot wall.

4. The filtration device according to claim 2, characterized in that, It also includes a U-shaped handle, with locking heads at both ends. The fixed frame is provided with a storage groove for accommodating the U-shaped handle, and the fixed frame is provided with a sliding groove that cooperates with the locking heads. The locking heads slide along the sliding groove to allow the U-shaped handle to enter or leave the storage groove. The sliding groove is a wedge-shaped groove that is wide at one end and narrow at the other end, so that after the U-shaped handle enters the storage groove, the locking heads can be locked at the narrow end of the sliding groove.

5. The filtration device according to claim 2, characterized in that, The fixed frame is provided with a clip head that extends and retracts relative to the fixed frame, and the filter channel is provided with a slot corresponding to the clip head.

6. The filtration device according to claim 5, characterized in that, It also includes a second electromagnet corresponding to the card head, the card head comprising a material that can be attracted by a magnet, the magnetic force of the second electromagnet being used to pull the card head out of the card slot.

7. The filtration device according to claim 1, characterized in that, It also includes a pressure detection device for detecting the pressure difference before and after the filter device; the spacing adjustment device controls the spacing of the filter screen according to the detection result of the pressure detection device.

8. A heat exchanger, characterized in that, Includes the filtration device as described in any one of claims 1 to 7.

9. An air conditioner, characterized in that, Includes the heat exchanger as described in claim 8.

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