Air inlet filtering device of duct type air conditioner and duct type air conditioner

Abstract

The utility model provides an air inlet filtering device of a duct type air conditioner and the duct type air conditioner. The inlet air filtering device comprises a winding and unwinding shaft and a mounting seat, the winding and unwinding shaft is rotatably mounted on one side of an air inlet of the duct type air conditioner, the mounting seat is fixed on the other side of the air inlet, two groups of transmission shafts are mounted at two ends of the mounting seat respectively, and two ends of the winding and unwinding shaft are in transmission connection with the two groups of transmission shafts through two groups of conveyor belts in a one-to-one correspondence manner; the two ends of the pull rod are fixed to the two sets of conveying belts respectively, the first side of the filter screen is fixed to the winding and unwinding shaft, the second side of the filter screen is fixed to the pull rod, and the filter screen is used for at least covering part of an air inlet of the duct type air conditioner after being unfolded. According to the air inlet filtering device of the duct type air conditioner and the duct type air conditioner, the telescopic filter screen module is designed and can be automatically folded when the air conditioner does not operate, the resistance of air flowing is reduced, and therefore the air circulation efficiency and the overall performance of an air conditioning system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical appliances, in particular to an air inlet filter device of an air duct machine and the air duct machine. Background Art

[0002] In the related art, in modern air-conditioning systems, the air inlet filter device is a vital component, which is responsible for filtering the air entering the air-conditioning system to remove dust, bacteria and other pollutants, thereby ensuring indoor air quality. Traditional duct air conditioner air inlet filters usually use fixed filters. Although these filters can play a certain filtering role, there are problems and challenges in the following aspects: First, while providing filtering functions, fixed filters may restrict air circulation and affect the efficiency of the air-conditioning system. As the filter becomes polluted and blocked, the air circulation will gradually decrease, resulting in a decrease in the air conditioning effect. Second, fixed filters need to be cleaned or replaced regularly to maintain their filtering efficiency. However, this process is often cumbersome and time-consuming, which is not convenient for users. Utility Model Content

[0003] The utility model provides an air inlet filter device for a duct air conditioner and a duct air conditioner, so as to solve the defects in the prior art and achieve the following technical effects: by designing a retractable filter module, it can be automatically retracted when the air conditioner is not running, thereby reducing the resistance to air flow, thereby improving the air circulation efficiency and the overall performance of the air conditioning system.

[0004] According to the first embodiment of the utility model, the air inlet filter device of the air duct machine includes:

[0005] A retractable reel and a mounting seat, wherein the retractable reel is rotatably mounted on one side of the air inlet of the duct machine, and the mounting seat is fixed on the other side of the air inlet. Two sets of transmission shafts are respectively mounted on both ends of the mounting seat, and the two ends of the retractable reel are connected to the two sets of transmission shafts in a one-to-one corresponding manner through two sets of conveyor belts;

[0006] A filter screen and a pull rod, wherein both ends of the pull rod are respectively fixed on two sets of conveyor belts, a first side of the filter screen is fixed on the retractable reel and a second side of the filter screen is fixed on the pull rod, and the filter screen is used to cover at least part of the air inlet of the duct machine after unfolding.

[0007] According to one embodiment of the utility model, each group of transmission shafts includes a fixed shaft and a shock-absorbing shaft, the fixed shaft is fixed on a mounting seat, the end of the conveyor belt is sleeved on the fixed shaft, the shock-absorbing shaft is installed on the mounting seat and can be slidably arranged in a direction perpendicular to the air inlet, and the conveyor belt is pressed against the shock-absorbing shaft.

[0008] According to an embodiment of the utility model, a shock-absorbing elastic member is connected between the shock-absorbing shaft and the mounting seat.

[0009] According to an embodiment of the utility model, the shock-absorbing elastic member is a spring, and the retractable direction of the spring is parallel to the slidable direction of the shock-absorbing shaft.

[0010] According to an embodiment of the utility model, a sliding groove is provided on the mounting seat, the shock absorbing shaft is slidably fitted in the sliding groove, and the sliding groove extends in a direction perpendicular to the air inlet.

[0011] According to one embodiment of the utility model, each group of transmission shafts includes two fixed shafts and one shock-absorbing shaft, and in a direction perpendicular to the air inlet, the two fixed shafts are staggered, and the shock-absorbing shaft is located between the two fixed shafts; and in a direction parallel to the air inlet, the shock-absorbing shaft and the fixed shaft are staggered.

[0012] According to one embodiment of the utility model, a first fitting piece and a second fitting piece are provided at the end of the pull rod, an installation gap is formed between the first fitting piece and the second fitting piece, and the second side of the filter screen and / or the conveyor belt are clamped in the installation gap between the first fitting piece and the second fitting piece.

[0013] According to an embodiment of the present invention, the first matching piece is a clamping boss protruding in a direction away from the air inlet, and the second matching piece is a clamping groove recessed in a direction away from the air inlet.

[0014] According to an embodiment of the utility model, a plurality of sawtooth-shaped small grooves are formed in the pressing groove, and the plurality of sawtooth-shaped small grooves are arranged at intervals along the extension direction of the conveyor belt.

[0015] The duct machine according to the second embodiment of the utility model includes:

[0016] The duct machine body is formed with an air inlet;

[0017] As described in the first aspect of the utility model, the air inlet filter device of the air duct machine is installed at the air inlet and the filter screen after unfolding is adapted to the shape of the air inlet.

[0018] The utility model provides an air inlet filter device for a duct air conditioner, which has the following significant advantages compared with the background technology:

[0019] (1) Improving air circulation efficiency: The utility model designs a retractable filter module that can be automatically retracted when the air conditioner is not in operation, thereby reducing the resistance to air flow and improving the air circulation efficiency and the overall performance of the air conditioning system.

[0020] (2) Intelligent control and automated operation: The utility model may integrate intelligent sensors and control systems, which can automatically adjust the extension and retraction state of the filter according to the air quality and filter status, and realize intelligent management. This automated operation reduces manual intervention, improves ease of use, and ensures that the filter is always in good working condition.

[0021] (3) Easy maintenance and cleaning: Since the filter module is designed to be retractable, users can more easily disassemble and handle the filter when cleaning or replacement is needed, without complicated steps or tools. This greatly reduces maintenance costs and user difficulty.

[0022] (4) Aesthetic design: The utility model can completely retract the filter when not in use, which not only reduces dust deposition but also keeps the appearance of the air-conditioning equipment neat and tidy. This is an important advantage for commercial and home environments that focus on design and aesthetics.

[0023] (5) Strong adaptability: The telescopic filter module of the utility model is flexibly designed and can be applied to duct machines of different models and sizes, and has strong adaptability and versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is one of the structural schematic diagrams of the air inlet filter device of the air duct machine provided by the utility model;

[0026] Figure 2 This is the second structural schematic diagram of the air inlet filter device of the air duct air conditioner provided by the utility model;

[0027] Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle;

[0028] Figure 4 This is the third structural schematic diagram of the air inlet filter device of the air duct air conditioner provided by the utility model;

[0029] Figure 5 yes Figure 4 A magnified schematic diagram of point B in the middle.

[0030] Reference numerals:

[0031] 1. Retractable reel; 2. Mounting seat; 21. Fixed shaft; 22. Shock-absorbing shaft; 23. Shock-absorbing elastic member; 24. Sliding plate; 25. Fixed plate; 26. Sliding groove; 3. Conveyor belt; 4. Filter; 5. Pull rod; 51. Clamping boss; 52. Clamping groove; 6. Motor. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0035] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] The following describes an air inlet filter device for an air duct air conditioner and an air duct air conditioner provided by the present invention with reference to the accompanying drawings.

[0037] like Figures 1 to 5 As shown, the air inlet filter device of the air duct machine according to the embodiment of the first aspect of the utility model includes a retractable reel 1, a mounting seat 2, a conveyor belt 3, a filter screen 4 and a pull rod 5.

[0038] The reel 1 is rotatably mounted on one side of the air inlet of the duct machine, and the mounting base 2 is fixed on the other side of the air inlet. Two sets of transmission shafts are respectively installed at both ends of the mounting base 2. The two ends of the reel 1 are connected to the two sets of transmission shafts in a one-to-one manner through two sets of conveyor belts 3.

[0039] The two ends of the pull rod 5 are respectively fixed on the two sets of conveyor belts, the first side of the filter 4 is fixed on the retractable reel 1 and the second side is fixed on the pull rod 5, and the filter 4 is used to cover at least part of the air inlet of the duct machine after unfolding.

[0040] It can be understood that, for the air inlet filter device provided by the utility model, the retractable reel 1 is rotatably mounted on one side of the air inlet of the air duct machine, and its main function is to serve as the winding and releasing point of the filter 4, and to control the unfolding and retracting of the filter 4 through the rotation action. The mounting seat 2 is fixed on the other side of the air inlet, providing stable support for the transmission shaft and the retractable reel 1, ensuring the stability of the transmission system and the correct position of the filter 4.

[0041] Furthermore, a conveyor belt 3 is connected between the retractable reel 1 and the transmission shaft of the mounting seat 2, and the rotation of the transmission shaft can be transmitted to the retractable reel 1 and the pull rod 5 through the conveyor belt 3, thereby driving the filter screen 4 to achieve the action of retracting and unfolding.

[0042] Among them, the design and material of the filter 4 should be able to effectively block dust and impurities while allowing air circulation. The filter 4 can be moved smoothly and maintain the correct tension during the unfolding and folding process through the action of the pull rod 5. Specifically, the two ends of the pull rod 5 are respectively fixed on two sets of conveyor belts, and the transmission shaft is rotated by the motor 6 or other driving source, thereby driving the conveyor belt to move, and then the conveyor belt simultaneously drives the retractable reel 1 to rotate and drives the pull rod 5 to move, and finally drives the filter 4 to unfold or fold, thereby realizing the control of the position of the filter 4. When the filter 4 is unfolded, it can at least cover part of the air inlet of the duct machine, thereby filtering the air.

[0043] It should be pointed out that the utility model can realize the switching of the folded and unfolded states of the filter 4 by automatic drive or manual operation. Taking automatic drive as an example, one of the retractable reel 1 and the transmission shaft is driven to rotate by the motor 6 as the driving shaft, thereby driving the other of the retractable reel 1 and the transmission shaft to rotate synchronously, that is, the motor 6 can be installed on one side of the retractable reel 1 and connected to the retractable reel 1, or the motor 6 can also be on one side of the transmission shaft and connected to the transmission shaft, and the utility model does not make special restrictions here. Taking manual drive as an example, a manual joystick can be set on at least one of the retractable reel 1, the transmission shaft and the pull rod 5, and the unfolding and folding of the filter 4 can be realized by manually operating the manual joystick.

[0044] It can be understood that, taking the connection between the motor 6 and the transmission shaft as an example, the working principle of the entire device is as follows: when air needs to be filtered, the motor 6 or other power source drives the transmission shaft to rotate, and transmits power to the reel 1 and the pull rod 5 through the conveyor belt 3, thereby realizing the rotation of the reel 1 and the movement of the pull rod 5, and then drives the filter 4 to unfold, covering part of the air inlet of the air duct machine to achieve air filtration. When filtering is not needed or the filter 4 needs to be cleaned, the filter 4 can be retracted by rotating the transmission shaft in the opposite direction, thereby reducing the covering area of ​​the air inlet.

[0045] In summary, the air intake filter device of the duct air conditioner of this design can not only effectively filter dust and impurities in the air and improve the air quality, but also maximize the air circulation and improve the air conditioning efficiency by retracting the filter 4 when the filtering function is not in use. At the same time, the automatic retraction function of the filter 4 also makes it more convenient and hygienic for users to use it.

[0046] In the related art, in modern air-conditioning systems, the air inlet filter device is a vital component, which is responsible for filtering the air entering the air-conditioning system to remove dust, bacteria and other pollutants, thereby ensuring indoor air quality. Traditional duct air conditioner air inlet filters usually use fixed filters. Although these filters can play a certain filtering role, there are problems and challenges in the following aspects: First, while providing filtering functions, fixed filters may restrict air circulation and affect the efficiency of the air-conditioning system. As the filter becomes polluted and blocked, the air circulation will gradually decrease, resulting in a decrease in the air conditioning effect. Second, fixed filters need to be cleaned or replaced regularly to maintain their filtering efficiency. However, this process is often cumbersome and time-consuming, which is not convenient for users.

[0047] Therefore, in order to solve the technical defects existing in the above-mentioned related technologies, the utility model provides an air inlet filter device for a duct air conditioner, which has the following significant advantages compared with the background technology:

[0048] (1) Improving air circulation efficiency: The utility model designs a retractable filter 4 module, which can be automatically retracted when the air conditioner is not in operation, thereby reducing the resistance to air flow, thereby improving the air circulation efficiency and the overall performance of the air conditioning system.

[0049] (2) Intelligent control and automated operation: The utility model may integrate intelligent sensors and control systems, which can automatically adjust the extension and contraction state of the filter 4 according to the air quality and the state of the filter 4, thus realizing intelligent management. This automated operation reduces manual intervention, improves ease of use, and ensures that the filter 4 always maintains a good working condition.

[0050] (3) Easy maintenance and cleaning: Since the filter 4 module is designed to be retractable, when cleaning or replacement is required, the user can more easily disassemble and handle the filter 4 without complicated steps or tools. This greatly reduces maintenance costs and user difficulty.

[0051] (4) Aesthetic design: The utility model can completely retract the filter 4 when not in use, which not only reduces dust deposition but also keeps the appearance of the air-conditioning equipment neat and tidy. This is an important advantage for commercial and home environments that focus on design and aesthetics.

[0052] (5) Strong adaptability: The telescopic filter 4 modules of the utility model are flexibly designed and can be applied to duct machines of different models and sizes, and have strong adaptability and versatility.

[0053] like Figure 3 As shown, according to some embodiments of the utility model, each group of transmission shafts includes a fixed shaft 21 and a shock-absorbing shaft 22, the fixed shaft 21 is fixed on the mounting seat 2, the end of the conveyor belt 3 is sleeved on the fixed shaft 21, the shock-absorbing shaft 22 is installed on the mounting seat 2 and can be slidably arranged in a direction perpendicular to the air inlet, and the conveyor belt 3 is pressed against the shock-absorbing shaft 22.

[0054] In this embodiment, the fixed shaft 21 is a part of the transmission shaft, and its main function is to provide a stable fixing point for the conveyor belt 3. The fixed shaft 21 is fixed to the mounting base 2 by a mechanical connection method (such as threaded connection, welding or buckle, etc.), ensuring that one end of the conveyor belt 3 is always connected to the mounting base 2, thereby realizing power transmission.

[0055] The shock-absorbing shaft 22 is another important component of the transmission shaft, which is designed to be slidable in a direction perpendicular to the air inlet. The main function of the shock-absorbing shaft 22 is to absorb and reduce the vibration and impact that may be generated during the movement of the filter 4, thereby protecting the structural integrity of the entire filter device and reducing noise. It can be understood that the sliding setting of the shock-absorbing shaft 22 allows it to be fine-tuned when the tension of the filter 4 changes or encounters external force impact, maintaining the appropriate tension of the conveyor belt 3 and the smooth movement of the filter 4.

[0056] The conveyor belt 3 is a key component connecting the reel 1 and the transmission shaft, and the power is transmitted through the tension of the conveyor belt 3. The end of the conveyor belt 3 is sleeved on the fixed shaft 21, which ensures the fixation and transmission efficiency of the conveyor belt 3. The conveyor belt 3 is pressed against the shock-absorbing shaft 22, so that when the reel 1 rotates, the tension of the conveyor belt 3 will be transmitted to the shock-absorbing shaft 22, thereby driving the telescopic movement of the filter 4. At the same time, the sliding characteristics of the shock-absorbing shaft 22 help to alleviate the vibration caused by the change in the tension of the conveyor belt 3.

[0057] The advantages of the above design are: (1) Stability: The fixed shaft 21 provides a stable support point, ensuring the stability of the transmission system; (2) Shock absorption: The design of the shock-absorbing shaft 22 can effectively absorb vibration, reduce noise, and extend the service life of the device; (3) Adjustability: The sliding setting of the shock-absorbing shaft 22 allows fine-tuning of the tension of the conveyor belt 3 to ensure the smoothness and reliability of the movement of the filter 4; (4) Maintainability: Due to the design of the shock-absorbing shaft 22 and the conveyor belt 3, the tension adjustment and maintenance of the filter 4 become easier.

[0058] In summary, the embodiment of the utility model realizes an efficient, stable and shock-absorbing transmission system through the design of the fixed shaft 21 and the shock-absorbing shaft 22, and the reasonable application of the conveyor belt 3, which has an important impact on the performance and life of the air inlet filter device of the duct machine.

[0059] like Figure 3 and Figure 5 As shown, further, a shock-absorbing elastic member 23 is connected between the shock-absorbing shaft 22 and the mounting seat 2 .

[0060] It can be understood that the shock-absorbing shaft 22 is connected to the mounting seat 2 through the shock-absorbing elastic member 23. This connection mode allows the shock-absorbing shaft 22 to move slightly within a certain range, thereby adapting to the change in the tension of the filter 4 and absorbing vibration. That is, the main function of the shock-absorbing elastic member 23 is to provide a flexible connection between the shock-absorbing shaft 22 and the mounting seat 2, absorbing and reducing the vibration caused by the telescopic movement of the filter 4 or the external environment.

[0061] The elastic member may be a spring, a rubber pad, an elastic washer or other types of damping materials, which can effectively alleviate impact force, reduce mechanical wear, and protect various components of the device.

[0062] like Figure 3 and Figure 5 As shown, in some specific embodiments, the shock-absorbing elastic member 23 is a spring, and the retractable direction of the spring is parallel to the slidable direction of the shock-absorbing shaft 22. In this way, the spring is parallel to the sliding direction of the shock-absorbing shaft 22, so that the spring can provide continuous support and buffering when the shock-absorbing shaft 22 moves. When the filter screen 4 vibrates or encounters external force impact during the expansion and contraction process, the spring can immediately expand and contract to absorb the energy, thereby reducing the impact on the transmission system and other components.

[0063] For example Figure 3 and Figure 5 As shown, the damping shaft 22 is fixed on the sliding plate 24, and the sliding plate 24 is slidably mounted on the mounting seat 2 in a direction perpendicular to the air inlet. A fixing plate 25 is also provided on the side of the mounting seat 2 away from the air inlet, and the fixing plate 25 is arranged opposite to the sliding plate 24. One end of the spring is fixed on the sliding plate 24 and the other end is fixed on the fixing plate 25. Furthermore, a fixing column for fixing the spring is also provided on the fixing plate 25, and the end of the spring is sleeved on the outside of the fixing column.

[0064] like Figure 3 and Figure 5 As shown, according to some embodiments of the present utility model, a sliding groove 26 is provided on the mounting seat 2, the shock absorbing shaft 22 is slidably fitted in the sliding groove 26, and the sliding groove 26 extends in a direction perpendicular to the air inlet.

[0065] In this embodiment, the sliding groove 26 is generally designed to be long and narrow, so that the damping shaft 22 can slide over a long distance, providing sufficient adjustment space and flexibility. This sliding fit allows the damping shaft 22 to adjust its position according to the movement of the filter screen 4 and the change of the external load, thereby maintaining the consistency and balance of the tension of the filter screen 4.

[0066] It can be understood that when the filter screen 4 vibrates or encounters external force during the expansion and contraction process, the movement of the shock-absorbing shaft 22 in the sliding groove 26 can effectively absorb and disperse these impact forces, reducing the impact on other components. In addition, the design of the sliding groove 26 enables the shock-absorbing shaft 22 to respond to the movement of the filter screen 4 more flexibly, thereby providing a more effective shock-absorbing effect.

[0067] In addition, the design of the sliding groove 26 simplifies the adjustment and maintenance of the position of the shock absorber shaft 22. If the position of the shock absorber shaft 22 needs to be adjusted, it only needs to be moved to a new position in the sliding groove 26. This design also facilitates the cleaning and inspection of the sliding groove 26 and the shock absorber shaft 22, which helps to find and solve problems in time and keep the filter device in good operating condition.

[0068] For example Figure 3 and Figure 5 As shown, the damping shaft 22 is slidably mounted on the mounting seat 2 through a sliding plate 24, and a protruding sliding member is provided on the surface of the sliding plate 24, and the sliding member is fitted in the sliding groove 26. Specifically, the sliding member can be a sliding column, which passes through the sliding groove 26 and the other end of which is limited by a nut on the surface of the mounting seat 2, thereby preventing the sliding plate 24 from sliding in a direction parallel to the sliding column.

[0069] like Figure 3 and Figure 5 As shown, further, the sliding groove 26 may include two parallel sliding grooves 26 , and correspondingly, two sliding columns are provided on the sliding plate 24 , and the sliding columns and the sliding grooves 26 are matched one by one.

[0070] like Figure 3 and Figure 5 As shown, according to some embodiments of the utility model, each group of transmission shafts includes two fixed shafts 21 and one shock-absorbing shaft 22. In the direction perpendicular to the air inlet, the two fixed shafts 21 are staggered, and the shock-absorbing shaft 22 is located between the two fixed shafts 21; and in the direction parallel to the air inlet, the shock-absorbing shaft 22 is staggered with the fixed shaft 21.

[0071] In this embodiment, each set of transmission shafts consists of two fixed shafts 21 and one shock-absorbing shaft 22. This three-shaft configuration provides additional stability and shock-absorbing capabilities. Specifically, the two fixed shafts 21 are staggered in a direction perpendicular to the air inlet, which means that they are not on the same horizontal line in height or depth, thereby providing a larger support area and better moment balance. The shock-absorbing shaft 22 is located between the two fixed shafts 21. This layout helps to concentrate the shock-absorbing effect and also facilitates the adjustment and maintenance of the transmission system.

[0072] In the direction parallel to the air inlet, the shock-absorbing shaft 22 and the fixed shaft 21 are staggered. This design helps to reduce the vibration and swing of the transmission system in the horizontal direction, thereby improving the stability and accuracy of the movement of the filter 4. The staggered shock-absorbing shaft 22 and the fixed shaft 21 can make the filter 4 more stable during the unfolding and folding process, reducing the additional wear and noise caused by vibration.

[0073] Thus, the staggered arrangement design of the fixed shaft 21 and the shock-absorbing shaft 22 not only improves the stability and shock-absorbing effect of the transmission system, but also helps to simplify the structure, reduce complexity, and reduce manufacturing costs. In addition, this design is also convenient for maintenance and replacement, and improves the reliability and service life of the entire duct air inlet filter device.

[0074] For example Figure 3 and Figure 5As shown, with the direction perpendicular to the air inlet as the up-down direction and the direction parallel to the air inlet and the conveyor belt as the left-right direction, the two fixed shafts 21 are arranged in the up-down direction, and the shock-absorbing shaft 22 is located on the left side of the two fixed shafts 21, lower than the upper fixed shaft 21 but higher than the lower fixed shaft 21.

[0075] The sliding groove 26 also extends in the up-down direction, and the sliding plate 24 is located directly above the fixed plate 25 .

[0076] According to some embodiments of the utility model, a first fitting part and a second fitting part are provided at the end of the pull rod 5, an installation gap is formed between the first fitting part and the second fitting part, and the second side of the filter screen 4 and / or the conveyor belt are clamped in the installation gap between the first fitting part and the second fitting part.

[0077] In this embodiment, the first matching piece and the second matching piece together constitute a clamping mechanism for fixing the filter screen 4 or the conveyor belt. The two matching pieces may have matching shapes, grooves or protrusions so that they can fit tightly and form a stable clamping space.

[0078] The installation gap between the first fitting and the second fitting is used to accommodate the second side of the filter screen 4 and / or the conveyor belt. The size and shape of this gap need to be precisely controlled to ensure that the filter screen 4 or the conveyor belt can be properly clamped without being too tight to cause damage.

[0079] It can be understood that the second side of the filter screen 4 and / or the conveyor belt are clamped in the installation gap between the first mating piece and the second mating piece. This clamping method can ensure that the filter screen 4 maintains appropriate tension and position during the unfolding and folding process.

[0080] In this way, the filter screen 4 is clamped by the installation gap between the first fitting and the second fitting, which can provide a stable fixing point and reduce the swing and vibration of the filter screen 4 during the movement. In addition, this clamping method helps to improve the stability and reliability of the entire filtering system, ensuring that the filter screen 4 can work effectively for a long time.

[0081] In addition, by precisely controlling the size of the installation gap, it can be ensured that the filter screen 4 always maintains appropriate tension, thereby improving the filtering efficiency and extending the service life of the filter screen 4.

[0082] like Figure 3 and Figure 5 As shown, in some specific embodiments, the first matching member is a pressing boss 51 protruding toward a direction away from the air inlet, and the second matching member is a pressing groove 52 recessed toward a direction away from the air inlet.

[0083] In this embodiment, the first matching piece is a clamping boss 51 that protrudes away from the air inlet and may have a certain height and width to form a clamping space with the second matching piece. The shape and size of the clamping boss 51 are designed to ensure that it can be in close contact with the filter 4 or the conveyor belt, thereby providing sufficient friction during the clamping process to prevent the filter 4 from sliding or shifting.

[0084] The second matching member is a pressing groove 52 which is concave and faces away from the air inlet. It is a concave structure and corresponds to the pressing boss 51, and is used to clamp the filter screen 4 or the conveyor belt. The depth and width of the pressing groove 52 need to match the pressing boss 51 to ensure a tight fit during the clamping process, while avoiding excessive squeezing or damage to the filter screen 4 or the conveyor belt.

[0085] For example, the conveyor belt 3 passes through and is fixed on the clamping boss 51, and the second side of the filter screen 4 is clamped between the clamping boss 51 and the clamping groove 52. The clamping boss 51 and the clamping groove 52 can be clamped and loosened by fastening connectors such as bolts and nuts.

[0086] Furthermore, a plurality of sawtooth-shaped small grooves (not shown in the figure) are formed in the pressing groove 52 , and the plurality of sawtooth-shaped small grooves are arranged at intervals along the extending direction of the conveyor belt 3 .

[0087] Thus, the design of the serrated small grooves increases the friction coefficient of the contact surface between the conveyor belt 3 and the pressing groove 52, thereby providing a stronger grip and fixing ability. In addition, the serrated small grooves are arranged at intervals along the extension direction of the conveyor belt 3, which helps to evenly distribute the pressure, avoid excessive local wear of the conveyor belt 3, and also help to dissipate heat and reduce noise.

[0088] According to other embodiments of the utility model, a fixing part such as a hook may be provided on the rod body of the pull rod 5, and the second side of the filter 4 is fixed on the fixing part such as the hook, so as to achieve the fixation of the filter 4 and the pull rod 5. Of course, the fixing method of the filter 4 is not limited to the above embodiments.

[0089] like Figures 1 to 5 As shown, the duct air conditioner according to the second embodiment of the utility model comprises a duct air conditioner body and an air inlet filter device of the duct air conditioner as described in the first embodiment of the utility model. The duct air conditioner body is formed with an air inlet; the air inlet filter device is installed at the air inlet and the filter screen 4 after unfolding is adapted to the shape of the air inlet.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An air inlet filter device for a duct air conditioner, characterized in that: include: A retractable reel and a mounting seat, wherein the retractable reel is rotatably mounted on one side of the air inlet of the duct machine, and the mounting seat is fixed on the other side of the air inlet. Two sets of transmission shafts are respectively mounted on both ends of the mounting seat, and the two ends of the retractable reel are connected to the two sets of transmission shafts in a one-to-one corresponding manner through two sets of conveyor belts; A filter screen and a pull rod, wherein both ends of the pull rod are respectively fixed on two sets of conveyor belts, a first side of the filter screen is fixed on the retractable reel and a second side of the filter screen is fixed on the pull rod, and the filter screen is used to cover at least part of the air inlet of the duct machine after unfolding.

2. The air inlet filter device for the air duct machine according to claim 1, characterized in that: Each set of transmission shafts includes a fixed shaft and a shock-absorbing shaft, wherein the fixed shaft is fixed on a mounting seat, the end of the conveyor belt is sleeved on the fixed shaft, the shock-absorbing shaft is mounted on the mounting seat and is slidable in a direction perpendicular to the air inlet, and the conveyor belt is pressed against the shock-absorbing shaft.

3. The air inlet filter device of the air duct machine according to claim 2, characterized in that: A shock-absorbing elastic member is connected between the shock-absorbing shaft and the mounting seat.

4. The air inlet filter device for the air duct machine according to claim 3, characterized in that: The shock-absorbing elastic member is a spring, and the retractable direction of the spring is parallel to the slidable direction of the shock-absorbing shaft.

5. The air inlet filter device for an air duct machine according to claim 2, characterized in that: The mounting seat is provided with a sliding groove, the damping shaft is slidably fitted in the sliding groove, and the sliding groove extends in a direction perpendicular to the air inlet.

6. The air inlet filter device of the air duct machine according to any one of claims 2 to 5, characterized in that: Each set of transmission shafts includes two fixed shafts and one shock-absorbing shaft. In a direction perpendicular to the air inlet, the two fixed shafts are staggered, and the shock-absorbing shaft is located between the two fixed shafts; and in a direction parallel to the air inlet, the shock-absorbing shaft and the fixed shaft are staggered.

7. The air inlet filter device of the air duct machine according to any one of claims 2 to 5, characterized in that: The end of the pull rod is provided with a first fitting member and a second fitting member, an installation gap is formed between the first fitting member and the second fitting member, and the second side of the filter screen and / or the conveyor belt is clamped in the installation gap between the first fitting member and the second fitting member.

8. The air inlet filter device for an air duct machine according to claim 7, characterized in that: The first matching piece is a pressing boss protruding in a direction away from the air inlet, and the second matching piece is a pressing groove recessed in a direction away from the air inlet.

9. The air inlet filter device for an air duct machine according to claim 8, characterized in that: A plurality of sawtooth-shaped small grooves are formed in the pressing groove, and the plurality of sawtooth-shaped small grooves are arranged at intervals along the extending direction of the conveyor belt.

10. A duct machine, characterized in that: include: The duct machine body is formed with an air inlet; An air inlet filter device for an air duct machine as described in any one of claims 1 to 9, wherein the air inlet filter device is installed at the air inlet and the filter screen after unfolding is adapted to the shape of the air inlet.

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