Central air conditioner air return structure capable of being opened according to airflow negative pressure guiding

Abstract

The utility model relates to a central air conditioner air return structure capable of being opened according to airflow negative pressure guiding, which comprises a casing and an air return port arranged at the bottom of the casing, a driving mechanism is arranged between the casing and the air return port, a movable sealing component is arranged inside the air return port, and the movable sealing component can seal an opening of the air return port. The movable sealing assembly acts under the action of negative pressure formed at the top of the return air inlet, so that the return air inlet is switched from the sealed state to the opened state, the return air inlet can be sealed through the arranged movable sealing assembly when the air conditioner is not used, dust is prevented from entering the air conditioner from the return air inlet, and dust is prevented from entering the air conditioner from the return air inlet when the air conditioner is used. Through operation of the driving mechanism, air in the air return opening is conveyed into the machine shell, so that negative pressure is formed in the air return opening, the negative pressure acts on the movable sealing assembly, the movable sealing assembly acts, the air return opening is switched from the sealing state to the opening state, and it is guaranteed that the air can flow back smoothly.

Description

Technical Field

[0001] This utility model relates to the field of central air conditioning technology, specifically a central air conditioning return air structure that can be opened according to the negative pressure of airflow. Background Technology

[0002] A central air conditioning system consists of one or more cold and heat source systems and multiple air conditioning systems. It uses the principle of liquid vaporization refrigeration to provide the required cooling capacity to the air conditioning system in order to offset the heat load of the indoor environment; the heating system provides the required heat to the air conditioning system in order to offset the cooling and heating load of the indoor environment.

[0003] A central air conditioning return air vent is a channel in an air conditioning system used to recycle indoor air. It is usually installed on the wall or ceiling of a room, drawing indoor air into the air conditioning unit through the return air duct for processing, and then returning the processed air to the room through the supply air vent.

[0004] However, the return air vents of existing central air conditioning systems are usually open. Over time, dust will accumulate inside the air conditioner through the return air vents, causing the air conditioner to become dusty and affecting its normal operation. This may also increase energy consumption, requiring professional disassembly and cleaning maintenance. Professional on-site service incurs additional costs, creating an unnecessary burden for families. Utility Model Content

[0005] The purpose of this invention is to provide a central air conditioning return air structure that can be opened according to the negative pressure of the airflow, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A central air conditioning return air structure that can be opened according to negative air pressure includes a housing and a return air inlet disposed at the bottom of the housing. The return air inlet is configured to be sealed at the top and open at the bottom. A drive mechanism is disposed between the housing and the return air inlet. During the movement of the drive mechanism, the air in the return air inlet will be transported into the housing, so as to form a negative pressure in the return air inlet.

[0008] The return air inlet is equipped with a movable sealing component inside. The movable sealing component can close the opening of the return air inlet. When the drive mechanism is running, the movable sealing component will be activated by the negative pressure formed at the top of the return air inlet, so that the return air inlet will switch from a sealed state to an open state.

[0009] As a further embodiment of this utility model:

[0010] The drive mechanism includes a dual-axis motor fixedly mounted on the housing and two sets of air duct components symmetrically arranged with the dual-axis motor as the center.

[0011] The air intake assembly includes two fans whose axes are fixedly connected to each other, and the two fans are connected by a sleeve seal on one side close to each other.

[0012] As a further improvement of this utility model:

[0013] The exhaust port of the fan is connected to one side wall of the casing, and the side of the fan away from the dual-shaft motor is connected to the top of the return air port through an air pipe.

[0014] A conveying pipe is vertically fixedly connected to the top of the return air vent, and the conveying pipe and the sleeve are interconnected.

[0015] As a further improvement of this utility model:

[0016] The output end of the dual-shaft motor is fixedly connected to the shaft of the fan, and an impeller is fixedly installed on the outer wall of the shaft.

[0017] As a further improvement of this utility model:

[0018] The movable sealing assembly includes a horizontally arranged frame plate, multiple vertical plates fixedly arranged inside the frame plate, and multiple horizontally arranged sealing plates. The frame plate is fixedly connected to the inner wall of the return air vent.

[0019] Two sealing plates are provided between two adjacent vertical plates, and the two sealing plates seal the gap between the two vertical plates.

[0020] As a further improvement of this utility model:

[0021] A rotating shaft is fixedly installed on the sealing plate, and both ends of the rotating shaft are rotatably connected to the inner wall of the frame plate.

[0022] A guide plate is fixedly provided at the end of the sealing plate away from the vertical plate. The angle between the guide plate and the sealing plate is 45 degrees, and the bottom end of the guide plate abuts against the side wall of the vertical plate.

[0023] As a further improvement of this utility model:

[0024] A support plate is horizontally fixedly installed on the side wall of the vertical plate and below the sealing plate, and an elastic sheet is fixedly installed on the top of the support plate.

[0025] The elastic sheet abuts against the end of the sealing plate near the vertical plate, and the elastic sheet causes the sealing plate to always have a tendency to rotate around the pivot, so that the bottom end of the guide plate is always in close contact with the vertical plate.

[0026] As a further improvement of this utility model:

[0027] An evaporator is installed inside the casing, and an air outlet is provided on the other side wall of the casing.

[0028] Compared with the prior art, the beneficial effects of this utility model are:

[0029] The movable sealing component can seal the return air vent when not in use, thus preventing dust from entering the air conditioner and causing a large amount of dust to accumulate inside, reducing cleaning and maintenance costs. When in use, the operation of the drive mechanism will transport the air in the return air vent into the casing, creating a negative pressure inside the return air vent. This negative pressure will act on the movable sealing component, causing it to activate and switch the return air vent from a sealed state to an open state, ensuring that air can flow back smoothly. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure.

[0031] Figure 2 This is a schematic diagram of the overall structure from another perspective.

[0032] Figure 3 This is a sectional view of the casing structure.

[0033] Figure 4 This is a cross-sectional view of the return air vent structure.

[0034] Figure 5 This is a schematic diagram of the movable sealing assembly.

[0035] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0036] Figure 7 This is a cross-sectional front view of the return air vent and the movable sealing assembly.

[0037] Figure 8 for Figure 7 Enlarged view of section B in the middle.

[0038] In the diagram: 1. Housing; 2. Return air inlet; 3. Dual-shaft motor; 4. Fan; 5. Sleeve; 6. Air pipe; 7. Delivery pipe; 8. Frame plate; 9. Vertical plate; 10. Sealing plate; 11. Rotating shaft; 12. Guide plate; 13. Support plate; 14. Elastic sheet; 15. Evaporator; 16. Air outlet. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Furthermore, the elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0041] Please see Figures 1-8 In this embodiment of the present invention, a central air conditioning return air structure that can be opened according to the negative pressure of airflow includes a housing 1 and a return air inlet 2 disposed at the bottom of the housing 1. The return air inlet 2 is configured to be sealed at the top and open at the bottom. A driving mechanism is disposed between the housing 1 and the return air inlet 2. During the movement of the driving mechanism, the air in the return air inlet 2 will be transported into the housing 1, so as to form a negative pressure in the return air inlet 2.

[0042] The return air vent 2 is equipped with a movable sealing component inside. The movable sealing component can close the opening of the return air vent 2. When the drive mechanism is running, the movable sealing component will be activated due to the negative pressure formed at the top of the return air vent 2, so that the return air vent 2 will switch from a sealed state to an open state.

[0043] In this solution, the movable sealing component can seal the return air vent 2 when not in use, thereby preventing dust from entering the air conditioner from the return air vent 2 and causing a large amount of dust to accumulate inside the air conditioner, thus reducing the cost of cleaning and maintenance. When in use, the operation of the drive mechanism will cause the air in the return air vent 2 to be transported into the casing 1, so that a negative pressure is formed in the return air vent 2. The negative pressure will act on the movable sealing component, causing the movable sealing component to move, so that the return air vent 2 switches from the sealed state to the open state, ensuring that the air can flow back smoothly.

[0044] As a further embodiment of this utility model, the drive mechanism includes a dual-axis motor 3 fixedly mounted on the housing 1 and two sets of air-guiding components symmetrically arranged with the dual-axis motor 3 as the center.

[0045] The air intake assembly includes two fans 4 whose shafts are fixedly connected to each other, and the two fans 4 are sealed together by a sleeve 5 on one side close to each other.

[0046] The exhaust port of the fan 4 is connected to one side wall of the housing 1, and the side of the fan 4 away from the dual-shaft motor 3 is connected to the top of the return air port 2 through the air pipe 6.

[0047] The top of the return air inlet 2 is vertically and fixedly connected to a conveying pipe 7, and the conveying pipe 7 and the sleeve 5 are interconnected.

[0048] The output end of the dual-shaft motor 3 is fixedly connected to the shaft of the fan 4, and an impeller is fixedly provided on the outer wall of the shaft.

[0049] In this embodiment, since the output end of the dual-shaft motor 3 is fixedly connected to the shaft of the fan 4, and an impeller is fixedly installed on the outer wall of the shaft, when the dual-shaft motor 3 is started, the shaft of the fan 4 will drive the impeller to rotate following the output end of the dual-shaft motor 3. The air in the fan 4 will be centrifugally accelerated and transported to the casing 1. At this time, the air in the return air port 2 will be replenished to the fan 4 through the air pipe 6 and the delivery pipe 7, which will result in a reduction of the air in the return air port 2, that is, a decrease in air pressure.

[0050] As a further embodiment of this utility model, the movable sealing assembly includes a horizontally arranged frame plate 8, a plurality of vertical plates 9 fixedly arranged inside the frame plate 8, and a plurality of horizontally arranged sealing plates 10, wherein the frame plate 8 is fixedly connected to the inner wall of the return air vent 2.

[0051] Two sealing plates 10 are provided between two adjacent vertical plates 9, and the two sealing plates 10 seal the gap between the two vertical plates 9;

[0052] A rotating shaft 11 is fixedly installed on the sealing plate 10, and both ends of the rotating shaft 11 are rotatably connected to the inner wall of the frame plate 8.

[0053] A guide plate 12 is fixedly provided at one end of the sealing plate 10 away from the vertical plate 9. The angle between the guide plate 12 and the sealing plate 10 is 45 degrees, and the bottom end of the guide plate 12 abuts against the side wall of the vertical plate 9.

[0054] A support plate 13 is horizontally fixedly provided on the side wall of the vertical plate 9 and below the sealing plate 10, and an elastic sheet 14 is fixedly provided on the top of the support plate 13.

[0055] The elastic sheet 14 abuts against the end of the sealing plate 10 near the vertical plate 9. The elastic sheet 14 will cause the sealing plate 10 to always have a tendency to rotate around the pivot 11, so that the bottom end of the guide plate 12 is always in close contact with the vertical plate 9.

[0056] In this embodiment, since the air in the return air vent 2 is reduced, i.e. the air pressure is reduced, the air outside the return air vent 2 will tend to replenish the return air vent 2. At this time, the external air will compress the guide plate 12. Since the guide plate 12 is fixedly connected to the sealing plate 10, and the sealing plate 10 is rotatably disposed in the frame plate 8 through the rotating shaft 11, the guide plate 12 will drive the sealing plate 10 to rotate around the rotating shaft 11. During this process, the sealing plate 10 will compress the elastic sheet 14 while rotating. When the sealing plate 10 rotates to a certain angle, the air can smoothly enter the return air vent 2, thereby replenishing the air in the return air vent 2.

[0057] The support plate 13 is used to fix and support the elastic sheet 14. The elastic sheet 14 is mainly used to work with the vertical plate 9 and the guide plate 12 to ensure that the sealing plate 10 is always horizontal when the air pressure is balanced, thereby sealing the gaps between the multiple vertical plates 9 to prevent dust from entering the return air vent 2 when not in use. In addition, the elastic force of the elastic sheet 14 is set to be small so that when negative pressure is formed, air can smoothly push the sealing plate 10 through the guide plate 12.

[0058] As a further embodiment of this utility model, an evaporator 15 is installed inside the casing 1, and an air outlet 16 is provided on the other side wall of the casing 1.

[0059] In this embodiment, the air entering the housing 1 from the fan 4 will be cooled down by the action of the evaporator 15 and then discharged into the room through the air outlet 16 to provide a cool environment for people; in addition, an air compressor for heating air (not shown in the figure) is also provided in the housing 1.

[0060] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0061] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A central air conditioning return air structure that can be opened according to negative air pressure, comprising a housing (1) and a return air inlet (2) disposed at the bottom of the housing (1), characterized in that, The return air inlet (2) is configured to be sealed at the top and open at the bottom. A drive mechanism is provided between the housing (1) and the return air inlet (2). During the movement of the drive mechanism, the air in the return air inlet (2) will be transported to the housing (1), so that a negative pressure is formed in the return air inlet (2). The return air inlet (2) is provided with a movable sealing component inside. The movable sealing component can close the opening of the return air inlet (2). When the drive mechanism is running, the movable sealing component will be activated due to the negative pressure formed on the top of the return air inlet (2), so that the return air inlet (2) will switch from a sealed state to an open state.

2. A central air conditioning return air structure that can be opened according to negative air pressure as described in claim 1, characterized in that, The drive mechanism includes a dual-axis motor (3) fixedly mounted on the housing (1) and two sets of air-guiding components symmetrically arranged with the dual-axis motor (3) as the center; The air intake assembly includes two fans (4) whose axes are fixedly connected to each other, and the two fans (4) are sealed together by a sleeve (5) on one side close to each other.

3. A central air conditioning return air structure that can be opened according to negative air pressure as described in claim 2, characterized in that, The exhaust port of the fan (4) is connected to one side wall of the casing (1), and the side of the fan (4) away from the dual-shaft motor (3) is connected to the top of the return air port (2) through the air pipe (6). The top of the return air inlet (2) is vertically fixed and connected to a conveying pipe (7), and the conveying pipe (7) and the sleeve (5) are interconnected.

4. A central air conditioning return air structure that can be opened according to negative air pressure as described in claim 2, characterized in that, The output end of the dual-shaft motor (3) is fixedly connected to the shaft of the fan (4), and an impeller is fixedly provided on the outer wall of the shaft.

5. A central air conditioning return air structure that can be opened according to negative air pressure as described in claim 1, characterized in that, The movable sealing assembly includes a horizontally arranged frame plate (8), a plurality of vertical plates (9) fixedly arranged inside the frame plate (8), and a plurality of horizontally arranged sealing plates (10). The frame plate (8) is fixedly connected to the inner wall of the return air vent (2). Two sealing plates (10) are provided between two adjacent vertical plates (9), and the two sealing plates (10) seal the gap between the two vertical plates (9).

6. A central air conditioning return air structure that can be opened according to negative air pressure as described in claim 5, characterized in that, A rotating shaft (11) is fixedly installed on the sealing plate (10), and the two ends of the rotating shaft (11) are rotatably connected to the inner wall of the frame plate (8); A guide plate (12) is fixedly provided at one end of the sealing plate (10) away from the vertical plate (9). The angle between the guide plate (12) and the sealing plate (10) is 45 degrees, and the bottom end of the guide plate (12) abuts against the side wall of the vertical plate (9).

7. A central air conditioning return air structure that can be opened according to negative air pressure as described in claim 6, characterized in that, A support plate (13) is horizontally fixedly provided on the side wall of the vertical plate (9) and below the sealing plate (10), and an elastic sheet (14) is fixedly provided on the top of the support plate (13); The elastic sheet (14) abuts against the end of the sealing plate (10) near the vertical plate (9). The elastic sheet (14) will cause the sealing plate (10) to always have a tendency to rotate around the pivot (11), so that the bottom end of the guide plate (12) is always in close contact with the vertical plate (9).

8. A central air conditioning return air structure that can be opened according to negative air pressure as described in claim 1, characterized in that, An evaporator (15) is installed inside the casing (1), and an air outlet (16) is provided on the other side wall of the casing (1).

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