Air volume control device and duct machine

Abstract

The present application provides an air volume control device and an air duct machine. The air volume control device comprises an air duct (1) and a fan, the fan having an air inlet, the air duct (1) being arranged on the air inlet side of the fan, the air outlet of the air duct (1) being arranged corresponding to the air inlet of the fan, and the distance between the air outlet of the air duct (1) and the air inlet of the fan being adjustable. According to the air volume control device of the present application, the fresh air volume can be effectively adjusted without adding a fresh air fan or an air valve, so that the fresh air volume entering the fan matches the fresh air supply required by the unit.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an air volume control device and an air duct machine. Background Art

[0002] Existing duct units are all equipped with fresh air inlets inside the unit, but the unit cannot control the supply of fresh air, resulting in the supply of fresh air not being able to be adjusted accordingly according to the needs of the unit. In order to adjust the fresh air supply of the unit, the current method mainly controls the fresh air volume by installing a separate fresh air fan or installing an air valve on the pipeline. However, adding a fresh air fan or installing an air valve will make the structure of the duct unit complex and increase the cost. If a fresh air fan is not installed or an air valve is installed, it is obviously difficult to effectively adjust the fresh air volume, and it is impossible to match the fresh air volume entering the fan with the fresh air supply required by the unit. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present application is to provide an air volume control device and an air duct machine, which can effectively adjust the fresh air volume without adding a fresh air fan or an air valve, so that the fresh air volume entering the fan matches the fresh air supply required by the unit.

[0004] In order to solve the above problems, the present application provides an air volume control device, including an air duct and a fan, the fan having an air inlet, the air duct is arranged on the air inlet side of the fan, the air outlet of the air duct is arranged corresponding to the air inlet of the fan, and the distance between the air outlet of the air duct and the air inlet of the fan can be adjusted.

[0005] Preferably, the air volume control device also includes a casing, the air duct and the fan are both arranged on the casing, the air inlet of the air duct is fixedly connected to the casing, and the distance between the air outlet of the air duct and the air inlet of the fan can be adjusted.

[0006] Preferably, the air duct includes a first pipe section and a second pipe section which are sleeved together, the first pipe section and the second pipe section can slide relative to each other, and a telescopic mechanism for adjusting the relative position of the first pipe section and the second pipe section is connected between the first pipe section and the second pipe section.

[0007] Preferably, the telescopic mechanism comprises a telescopic rod, the top end of the telescopic rod is connected to the first pipe segment, the end of the telescopic rod is connected to the second pipe segment, and the telescopic rod can be telescoped to control the relative position of the first pipe segment and the second pipe segment.

[0008] Preferably, the telescopic rod is hollow, and a pull rope and a spring are provided inside the telescopic rod. The first end of the spring abuts against the top end of the telescopic rod, the second end of the spring is fixed relative to the end of the telescopic rod, the first end of the pull rope is connected to the top end of the telescopic rod, and the second end of the pull rope is used to receive tension to pull the top end of the telescopic rod to retract.

[0009] Preferably, the second end of the spring is fixedly connected to the end of the telescopic rod.

[0010] Preferably, the pull rope extends out of the end of the telescopic rod when the telescopic rod is fully extended; or, the air volume control device further includes a drive motor, and the second end of the pull rope is connected to the drive end of the drive motor.

[0011] Preferably, a positioning ring is connected to the top end of the telescopic rod, the positioning ring is sleeved outside the first pipe section and fixedly connected to the first pipe section, and a plurality of telescopic rods are arranged at intervals along the circumference of the positioning ring.

[0012] Preferably, the plurality of telescopic rods are parallel to each other and vertically arranged on the end surface of the second pipe section.

[0013] Preferably, the first pipe section is the pipe section where the air outlet of the air duct is located, and the second pipe section is the pipe section where the air inlet of the air duct is located.

[0014] Preferably, the first pipe segment and the second pipe segment are connected to at least one intermediate pipe segment, a limiting structure for limiting the relative sliding position of the first pipe segment and the intermediate pipe segment is formed between the first pipe segment and the intermediate pipe segment, and a limiting structure for limiting the relative sliding position of the intermediate pipe segment and the second pipe segment is formed between the intermediate pipe segment and the second pipe segment.

[0015] Preferably, the air volume control device further includes a pressure difference sensor, and the pressure difference sensor is arranged in the air duct.

[0016] Preferably, the fan is a centrifugal fan, the centrifugal fan comprises a volute, and the air inlet of the fan is the air inlet of the volute.

[0017] According to another aspect of the present application, a duct air conditioner is provided, comprising an air volume control device, which is the above-mentioned air volume control device.

[0018] The air volume control device provided by the present application includes an air duct and a fan, the fan has an air inlet, the air duct is arranged on the air inlet side of the fan, the air outlet of the air duct is arranged corresponding to the air inlet of the fan, and the distance between the air outlet of the air duct and the air inlet of the fan can be adjusted. The air volume control device can adjust the suction force of the fan on the air in the air duct by adjusting the distance between the air outlet of the air duct and the air inlet of the fan, and then adjust the air volume entering the fan by adjusting the distance between the air outlet of the air duct and the air inlet of the fan. The whole adjustment process does not need to add a new fan or air valve, and can effectively adjust the air volume, so that the air volume entering the fan matches the fresh air supply required by the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional structural diagram of an air volume control device according to an embodiment of the present application;

[0020] Figure 2A schematic diagram of the three-dimensional structure of an air duct of an air volume control device according to an embodiment of the present application;

[0021] Figure 3 A schematic cross-sectional view of the telescopic rod of the air volume control device according to an embodiment of the present application;

[0022] Figure 4 This is a partially enlarged structural diagram of the telescopic rod of the air volume control device of an embodiment of the present application.

[0023] The reference numerals are as follows:

[0024] 1. Air duct; 2. Volute; 3. Casing; 4. First pipe section; 5. Second pipe section; 6. Middle pipe section; 7. Telescopic rod; 8. Spring; 9. Pull rope; 10. Positioning ring. DETAILED DESCRIPTION

[0025] See also Figures 1 to 4 As shown, according to an embodiment of the present application, the air volume control device includes an air duct 1 and a fan, the fan has an air inlet, the air duct 1 is arranged on the air inlet side of the fan, the air outlet of the air duct 1 is arranged corresponding to the air inlet of the fan, and the distance between the air outlet of the air duct 1 and the air inlet of the fan can be adjusted.

[0026] The air volume control device can adjust the suction force of the fan on the air in the air duct 1 by adjusting the distance between the air outlet of the air duct 1 and the air inlet of the fan, and then adjust the air volume entering the fan by adjusting the distance between the air outlet of the air duct 1 and the air inlet of the fan. The entire adjustment process does not require the addition of a new air fan or an air valve, and can effectively adjust the air volume so that the air volume entering the fan matches the fresh air supply required by the unit.

[0027] The air duct 1 mentioned above is, for example, a fresh air duct.

[0028] The air volume control device also includes a housing 3, the air duct 1 and the fan are both arranged on the housing 3, the air inlet of the air duct 1 is fixedly connected to the housing 3, and the distance between the air outlet of the air duct 1 and the air inlet of the fan can be adjusted. In this embodiment, the air outlet of the air duct 1 and the air inlet of the fan are adjusted by setting the air duct 1 in a retractable manner, so that the distance between the air outlet of the air duct 1 and the air inlet of the fan can be flexibly adjusted as needed without changing the position of the air inlet of the air duct 1, thereby achieving the purpose of adjusting the air volume.

[0029] The air volume control device of the present embodiment can change the suction force of the fan on the air in the air duct 1 by adjusting the distance between the air outlet of the air duct 1 and the air inlet of the fan. When the fresh air duct is long, the suction force of the fan on the air in the air duct 1 can be increased by reducing the distance between the air outlet of the air duct 1 and the air inlet of the fan. This is equivalent to adding a power device, and can effectively avoid the problem of small fresh air volume due to the lack of an external power device, so that the fresh air volume entering the fan can match the fresh air supply required by the unit.

[0030] In other embodiments, the air duct 1 may be translated as a whole so that the air duct 1 can move in a direction close to or away from the air inlet of the fan, thereby adjusting the distance between the air outlet of the air duct 1 and the air inlet of the fan.

[0031] The air duct 1 includes a first pipe section 4 and a second pipe section 5 which are sleeved together, and the first pipe section 4 and the second pipe section 5 can slide relative to each other. A telescopic mechanism for adjusting the relative position of the first pipe section 4 and the second pipe section 5 is connected between the first pipe section 4 and the second pipe section 5. In this embodiment, the first pipe section 4 and the second pipe section 5 are sleeved together and can slide relative to each other, the fixed end of the telescopic mechanism is fixed relative to the second pipe section 5, and the telescopic end is fixed to the first pipe section 4, so the telescopic control of the first pipe section 4 and the second pipe section 5 can be achieved by telescoping the telescopic mechanism, and the telescopic length of the air duct 1 can be adjusted, thereby adjusting the distance between the air outlet of the air duct 1 and the air inlet of the fan.

[0032] The telescopic mechanism includes a telescopic rod 7, the top end of which is connected to the first pipe section 4, and the bottom end of which is connected to the second pipe section 5. The telescopic rod 7 can be extended and retracted to control the relative position of the first pipe section 4 and the second pipe section 5. The telescopic rod 7 can adjust the relative position between the first pipe section 4 and the second pipe section 5. By controlling the extension and retraction of the telescopic rod 7, the telescopic control between the first pipe section 4 and the second pipe section 5 can be conveniently realized.

[0033] The telescopic rod 7 is hollow, and a pull cord 9 and a spring 8 are arranged inside the telescopic rod 7. The first end of the spring 8 abuts against the top of the telescopic rod 7, and the second end of the spring 8 is fixed relative to the end of the telescopic rod 7. The first end of the pull cord 9 is connected to the top of the telescopic rod 7, and the second end of the pull cord 9 is used to receive the tension to pull the top of the telescopic rod 7 to retract. In this embodiment, the pull cord 9 is used to apply tension to the top of the telescopic rod 7 when the telescopic rod 7 needs to be retracted, so that the top of the telescopic rod 7 retracts under the tension, and then drives other telescopic rod segments to retract together, so as to achieve the contraction control of the air duct 1. When the telescopic rod 7 needs to be extended, no external force can be applied to the pull cord 9 at this time. Under the elastic force of the spring 8, the top of the telescopic rod 7 is pushed outward by the spring 8, and then the other telescopic rod segments are pulled out. Under the elastic force of the spring 8, the telescopic rod 7 can be kept in the extended state, so that the air duct 1 can also be kept in the extended state.

[0034] The pulling of the pull rope 9 can be operated manually or automatically controlled by other electric control structures.

[0035] Preferably, the second end of the spring 8 is fixedly connected to the end of the telescopic rod 7. Generally speaking, it is only necessary to fix the second end of the spring 8 relative to the end position of the telescopic rod 7. Therefore, the spring 8 does not have to be fixed to the end of the telescopic rod 7, and can also be fixed to the mounting structure of the telescopic rod 7, such as the second pipe section 5 of the air duct 1, or fixed to the housing 3 on which the air duct 1 is mounted. In this embodiment, the second end of the spring 8 is fixedly connected to the end of the telescopic rod 7, so that the spring 8 and the telescopic rod 7 can be integrated, which not only makes the structural design simpler, but also makes the telescopic rod 7 a complete independent structure, which can be processed and produced separately, is easy to replace and install, can save installation space, and more reasonably utilize the structure of the telescopic rod 7.

[0036] In other embodiments, the spring 8 may be directly sleeved outside the telescopic rod 7, and the pull rope may be arranged inside the hollow telescopic rod 7, so as to facilitate the installation and fixation of the spring 8 and reduce the structural difficulty.

[0037] In one embodiment, the pull cord 9 extends out of the end of the telescopic rod 7 when the telescopic rod 7 is fully extended, so that the pull cord 9 can extend out of the telescopic rod 7 when it is fully unfolded, which is convenient for manually pulling the pull cord 9 to control the telescopic rod 7.

[0038] In another embodiment, the air volume control device further includes a driving motor, and the second end of the pull rope 9 is connected to the driving end of the driving motor. In this embodiment, the pull rope 9 is wound by the output shaft of the driving motor to achieve the tightening action, thereby achieving the contraction operation of the telescopic rod 7. Since the driving motor is controlled by electromechanical means, it is more convenient to achieve remote control of the extension operation of the telescopic rod 7, and the extension and contraction control of the air duct 1 is simpler and more convenient.

[0039] In this embodiment, a positioning ring 10 is connected to the top of the telescopic rod 7. The positioning ring 10 is sleeved outside the first pipe section 4 and fixedly connected to the first pipe section 4. A plurality of telescopic rods 7 are arranged at intervals along the circumference of the positioning ring 10. By providing the positioning ring 10, an intermediate connection structure can be formed by using the positioning ring 10. The positioning ring 10 can be fixedly connected to the outside of the first pipe section 4, and then a plurality of telescopic rods 7 can be connected to the positioning ring 10 together, so that the forces of the plurality of telescopic rods 7 act together on the positioning ring 10, and then act on the first pipe section 4 through the positioning ring 10, which can ensure the balance of the forces applied by each telescopic rod 7 to the first pipe section 4, ensure that the forces on the first pipe section 4 are more evenly applied, and reduce the difficulty of connecting the telescopic rod 7 with the first pipe section 4.

[0040] The positioning ring 10 and the first pipe section 4 are fixedly connected by a plurality of connecting rods, which can ensure the stability and reliability of the connection structure between the positioning ring 10 and the first pipe section 4. The positioning ring 10 can play a role in positioning the air duct 1, prevent the air duct 1 from being dislocated due to the force caused by being suspended in the air after being stretched, and improve the stability of the overall structure of the air duct 1 during the expansion and contraction process.

[0041] Preferably, the multiple telescopic rods 7 are parallel to each other and vertically arranged on the end face of the second pipe section 5. The telescopic direction of the telescopic rods 7 is the same as the telescopic direction of the air duct 1, so that the directions of the forces provided by the multiple telescopic rods 7 during the telescopic process are the same as the telescopic direction of the air duct 1, and there is no component force. Therefore, the telescopic force of the telescopic rods 7 can fully act on the telescopic extension of the air duct 1, and the force utilization efficiency is higher.

[0042] Preferably, the first pipe section 4 is the pipe section where the air outlet of the air duct 1 is located, and the second pipe section 5 is the pipe section where the air inlet of the air duct 1 is located, so that the first pipe section 4 and the second pipe section 5 can be distributed at both ends of the air duct 1, so that the expansion and contraction of the overall structure of the air duct 1 can be controlled by controlling the relative positions of the first pipe section 4 and the second pipe section 5.

[0043] In this embodiment, the first pipe section 4 and the second pipe section 5 are connected to at least one intermediate pipe section 6, and a limiting structure for limiting the relative sliding position of the first pipe section 4 and the intermediate pipe section 6 is formed between the first pipe section 4 and the intermediate pipe section 6, and a limiting structure for limiting the relative sliding position of the intermediate pipe section 6 and the second pipe section 5 is formed between the intermediate pipe section 6 and the second pipe section 5. By providing a limiting structure between adjacent pipe sections, it is possible to prevent the separation of each pipe section during the extension and retraction process of the air duct 1, thereby ensuring the continuity and reliability of the structure between each pipe section of the air duct 1. The connection relationship between each pipe section of the air duct 1 is similar to the connection relationship between each section of a retractable TV antenna. That is, the air duct 1 includes two adjacent pipe sections, the pipe section located at the bottom is set as the lower pipe section, and the pipe section located at the top is set as the upper pipe section, the upper pipe section is sleeved in the lower pipe section and can slide in the lower pipe section, wherein the lower pipe section includes a concave section located at the top and a circular pipe section located at the lower side of the concave section, wherein the structures of the circular pipe section and the concave section are basically the same, the difference is that the concave section has a lower groove extending in the circumferential direction, and the upper pipe section has a circular pipe section at the bottom end, and the upper side of the circular pipe section is connected to the concave section, wherein the length of the concave section of the upper pipe section is greater than the length of the circular pipe section, and the length of the concave section of the lower pipe section is less than the length of the circular pipe section. The length of the segments, the circular tube segment of the upper tube segment is located inside the circular tube segment of the lower tube segment, the concave segment of the upper tube segment is arranged correspondingly to the concave segment of the lower tube segment, that is, the depression of the concave segment of the lower tube segment is located inside the depression of the concave segment of the upper tube segment, thereby limiting the circumferential relative position of the lower tube segment and the upper tube segment. At the same time, since the cross-sectional area of ​​the circular tube segment of the upper tube segment is larger than the cross-sectional area of ​​the concave segment of the lower tube segment, the circular tube segment of the upper tube segment is stopped inside the circular tube segment of the lower tube segment and cannot slide out through the concave segment of the lower tube segment, thereby preventing the upper tube segment from being separated from the lower tube segment and ensuring the stability of the connection structure of the upper tube segment and the lower tube segment. The matching relationship of each tube segment of the air duct 1 is the same as the matching relationship between the upper tube segment and the lower tube segment, thereby ensuring the continuity and stability of the overall structure of the air duct 1.

[0044] The number of intermediate pipe sections 6 between the first pipe section 4 and the second pipe section 5 can be adjusted as needed, so that the telescopic length of the air duct 1 can be reasonably set, more effectively ensuring that the telescopic length of the air duct 1 can effectively meet the air volume adjustment requirements of the air volume control device.

[0045] The air volume control device also includes a pressure difference sensor, which is arranged in the air duct 1 and can detect the amount of air entering the air duct 1, and then adjust the distance between the air outlet of the air duct 1 and the air inlet of the fan according to the detected amount of air entering the air duct 1.

[0046] In this embodiment, the fan is a centrifugal fan, the centrifugal fan comprises a volute 2 , and the air inlet of the fan is the air inlet of the volute 2 .

[0047] This device affects the suction force of the centrifugal fan blades on the air in the fresh air duct by adjusting the distance between the air outlet of the air duct 1 and the air inlet of the volute, and finally affects the amount of fresh air. When the driving motor adjusts the length of the pull rope 9 to be longer, the elastic force of the spring 8 pushes the telescopic rod 7 outward, the length of the air duct 1 is longer, the distance between the air outlet of the air duct 1 and the air inlet of the volute is reduced, the suction force of the centrifugal fan blades on the air in the fresh air duct is increased, and the amount of fresh air is increased. When the driving motor adjusts the length of the pull rope 9 to be shorter, the spring 8 is compressed, the length of the air duct 1 is shortened, the distance between the air outlet of the air duct 1 and the air inlet of the volute is increased, the suction force of the centrifugal fan blades on the air in the fresh air duct is reduced, and the amount of fresh air is reduced.

[0048] Since the embodiments of the present application can increase the suction force of the centrifugal fan blades on the air in the fresh air duct by reducing the distance between the air outlet of the air duct 1 and the air inlet of the volute, it is equivalent to adding a power device. Therefore, it solves the problem of small fresh air volume due to the lack of an external power device when the fresh air duct is long.

[0049] According to an embodiment of the present application, the air duct unit includes an air volume control device, which is the above-mentioned air volume control device.

[0050] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0051] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. An air volume control device, characterized in that: It comprises an air duct (1) and a fan, the fan having an air inlet, the air duct (1) being arranged on the air inlet side of the fan, the air outlet of the air duct (1) being arranged corresponding to the air inlet of the fan, and the distance between the air outlet of the air duct (1) and the air inlet of the fan being adjustable; The air duct (1) comprises a first pipe section (4) and a second pipe section (5) which are sleeved together, the first pipe section (4) and the second pipe section (5) being able to slide relative to each other, the first pipe section (4) being the pipe section where the air outlet of the air duct (1) is located, the second pipe section (5) being the pipe section where the air inlet of the air duct (1) is located, and the distance between the end surface of the first pipe section (4) facing away from the second pipe section (5) and the air inlet of the fan is adjustable; A telescopic mechanism for adjusting the relative position of the first pipe section (4) and the second pipe section (5) is connected between the first pipe section (4) and the second pipe section (5); The telescopic mechanism comprises a telescopic rod (7), the top end of the telescopic rod (7) is connected to the first pipe section (4), the end of the telescopic rod (7) is connected to the second pipe section (5), and the telescopic rod (7) is capable of telescoping to control the relative position of the first pipe section (4) and the second pipe section (5).

2. The air volume control device according to claim 1, characterized in that: The air volume control device further comprises a casing (3), the air duct (1) and the fan are both arranged on the casing (3), the air inlet of the air duct (1) is fixedly connected to the casing (3), and the distance between the air outlet of the air duct (1) and the air inlet of the fan is adjustable.

3. The air volume control device according to claim 1, characterized in that: The telescopic rod (7) is hollow, and a pull rope (9) and a spring (8) are arranged inside the telescopic rod (7). The first end of the spring (8) abuts against the top end of the telescopic rod (7), and the second end of the spring (8) is fixed to the end of the telescopic rod (7). The first end of the pull rope (9) is connected to the top end of the telescopic rod (7), and the second end of the pull rope (9) is used to receive a pulling force to pull the top end of the telescopic rod (7) to retract.

4. The air volume control device according to claim 3, characterized in that: The pull rope (9) extends out of the end of the telescopic rod (7) when the telescopic rod (7) is fully extended; or, the air volume control device also includes a drive motor, and the second end of the pull rope (9) is connected to the drive end of the drive motor.

5. The air volume control device according to claim 1, characterized in that: The top end of the telescopic rod (7) is connected to a positioning ring (10), the positioning ring (10) is sleeved outside the first pipe section (4) and fixedly connected to the first pipe section (4), and a plurality of telescopic rods (7) are arranged at intervals along the circumference of the positioning ring (10).

6. The air volume control device according to claim 5, characterized in that: The plurality of telescopic rods (7) are parallel to each other and are vertically arranged on the end surface of the second pipe section (5).

7. The air volume control device according to claim 1, characterized in that: At least one intermediate pipe section (6) is connected between the first pipe section (4) and the second pipe section (5); a limiting structure for limiting relative sliding between the first pipe section (4) and the intermediate pipe section (6); and a limiting structure for limiting relative sliding between the intermediate pipe section (6) and the second pipe section (5).

8. The air volume control device according to any one of claims 1 to 7, characterized in that: The air volume control device further comprises a pressure difference sensor, and the pressure difference sensor is arranged in the air duct (1).

9. The air volume control device according to any one of claims 1 to 7, characterized in that: The fan is a centrifugal fan, the centrifugal fan comprises a volute (2), and the air inlet of the fan is the air inlet of the volute (2).

10. A ducted air conditioner, comprising an air volume control device, characterized in that: The air volume control device is the air volume control device according to any one of claims 1 to 9.

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