Pipeline counterweight structure and control method thereof, air conditioner

Abstract

The application provides a pipeline counterweight structure and a control method thereof and an air conditioner. The pipeline counterweight structure comprises a target pipe, an elastic counterweight and a displacement driving element. The displacement driving element can move linearly along the length extension direction of the target pipe to pull or press the elastic counterweight, so as to change the length of the elastic counterweight and / or the position of the elastic counterweight relative to the target pipe. The length and / or position of the elastic counterweight can be changed by the displacement driving element, thereby increasing the diversity of damping frequencies. The length and position of the elastic counterweight can be adjusted according to different operating frequencies of the compressor in actual application conditions, and a better damping effect can be achieved under the same counterweight mass compared with a traditional counterweight.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to a pipeline counterweight structure and its control method, and an air conditioner. Background Technology

[0002] In air conditioning systems, pipe counterweights typically consist of rubber rings, damping blocks, and pipe clamps. These counterweights are fixed to the pipes to alter their natural frequency and prevent resonance. The position and length of the counterweight both affect the pipe's natural frequency. However, the mass distribution and position of existing pipe counterweights are fixed after installation, resulting in less than ideal vibration and noise reduction. Especially since the counterweight length is fixed after installation, it can only alter the natural frequency of a single order, with little improvement to other orders. Therefore, the existing pipe counterweight structure needs optimization. Summary of the Invention

[0003] Therefore, the present invention provides a pipeline counterweight structure and its control method, as well as an air conditioner, which can solve the technical problem that the counterweight structure in the prior art has a fixed counterweight length after installation, can only change the fixed frequency of a certain order of pipeline, and has little effect on improving the fixed frequency of other orders.

[0004] To address the aforementioned problems, the present invention provides a pipeline counterweight structure, including a target pipe fitting, on which an elastic counterweight and a displacement driving member are disposed. The displacement driving member is capable of linear movement along the length extension direction of the target pipe fitting to pull or push back the elastic counterweight to change the length of the elastic counterweight and / or the position of the elastic counterweight relative to the target pipe fitting.

[0005] In some embodiments, there are two displacement actuators, each connected to one end of the elastic counterweight.

[0006] In some embodiments, each of the displacement actuators can be controlled to operate independently; and / or, the elastic counterweight is a metal helical spring.

[0007] In some embodiments, the displacement drive includes a housing fitted onto the target pipe, a drive motor disposed inside the housing and fixedly connected to the housing, and a drive roller connected to the output end of the drive motor shaft, the drive roller being abutted against the outer wall of the target pipe.

[0008] In some embodiments, the housing is further provided with two movable guide wheels, which are rotatably connected to the housing. The two movable guide wheels are arranged opposite to each other and surround a portion of the outer wall of the target pipe along the circumferential direction of the target pipe. And / or, the housing is further provided with a position detection component, which is capable of detecting the zero point of the target pipe.

[0009] In some embodiments, a positioning device is further provided inside the housing. The positioning device includes a positioning block, which has a positioning position that abuts against the outer wall of the target pipe and a moving position that disengages from the outer wall of the target pipe. During the operation of the drive motor to move the displacement drive member, the positioning block is in the moving position, and when the drive motor stops operating, the positioning block is in the positioning position.

[0010] In some embodiments, the positioning block is slidably connected to the housing, and the positioning device further includes an electromagnetic drive. The positioning block and the electromagnetic drive are arranged sequentially from the inside to the outside along the radial direction of the target pipe, and a magnet is provided on the side of the positioning block facing the electromagnetic drive.

[0011] The present invention also provides a control method for the pipeline counterweight structure as described above, comprising the following steps:

[0012] Obtain the real-time operating frequency of the compressor;

[0013] The displacement drive is controlled to move along the length extension direction of the target pipe according to the obtained real-time operating frequency, and the displacement drive is controlled to stop moving when it reaches the target position. The target position is the position corresponding to the peak value and the minimum mean value of the pipeline vibration response at the real-time operating frequency.

[0014] In some implementations, the positions corresponding to the peak and minimum mean values ​​of the pipeline vibration response at the real-time operating frequency are obtained by modeling and simulating the target pipe and the displacement drive.

[0015] In some embodiments, when the pipeline counterweight structure includes a drive motor and a positioning block, the positioning block is controlled to be in a moving position when the drive motor is running, and the positioning block is controlled to be in a fixed position when the drive motor stops running.

[0016] The present invention also provides an air conditioner including the above-described pipe counterweight structure.

[0017] This invention provides a pipeline counterweight structure and its control method, as well as an air conditioner. The length and / or position of the elastic counterweight can be changed by a displacement driving component, thereby increasing the diversity of vibration reduction frequencies. In actual application conditions, the length and position of the elastic counterweight can be adjusted according to different operating frequencies of the compressor, achieving a better vibration reduction effect with the same counterweight mass compared to traditional counterweights. Since the length of the elastic counterweight can be linearly adjusted, it overcomes the disadvantage of the invariable length of traditional counterweight structures, enabling it to improve multi-order fixed frequencies. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the pipeline counterweight structure in one embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the internal structure of the displacement drive component (partially disassembled);

[0020] Figure 3 This is a schematic diagram of the control logic of the pipeline counterweight structure in another embodiment of the present invention;

[0021] Figure 4 A comparison diagram of the vibration response of pipeline monitoring points under different pipeline counterweight structures.

[0022] The reference numerals in the attached figures are as follows:

[0023] 1. Elastic counterweight; 2. Displacement drive component; 201. Bottom shell; 202. Top cover; 21. Drive motor; 22. Moving guide wheel; 23. Positioning block; 24. Position detection component; 100. Target pipe fitting. Detailed Implementation

[0024] See also Figures 1 to 4 As shown, according to an embodiment of the present invention, a pipeline counterweight structure is provided, including a target pipe fitting 100, an elastic counterweight 1 and a displacement driving member 2 are provided on the target pipe fitting 100, the displacement driving member 2 is capable of linear movement along the length extension direction of the target pipe fitting 100 so as to pull or push back the elastic counterweight 1 to change the length of the elastic counterweight 1 and / or the position of the elastic counterweight 1 relative to the target pipe fitting 100.

[0025] In this technical solution, the length and / or position of the elastic counterweight 1 can be changed by the displacement drive 2, thereby increasing the diversity of vibration reduction frequencies. In actual application conditions, the length and position of the elastic counterweight 1 can be adjusted according to the different operating frequencies of the compressor, achieving a better vibration reduction effect with the same counterweight mass compared to traditional counterweights. Since the length of the elastic counterweight 1 can be linearly adjusted, it overcomes the disadvantage of the invariable length of traditional counterweight structures, enabling it to change the multi-order fixed frequency of the pipeline.

[0026] Two displacement drive components 2 are connected to the two ends of the elastic counterweight 1, respectively, to enable more flexible and varied driving adjustments to the length and position of the elastic counterweight 1. In a preferred embodiment, each displacement drive component 2 can be controlled independently. For example, one displacement drive component 2 can move in one direction while the other moves in another direction, increasing the length of the elastic counterweight 1; or, for another example, the two displacement drive components 2 can move towards each other, shortening the length of the elastic counterweight 1; or, for yet another example, the two displacement drive components 2 can move synchronously in the same direction, in which case the length of the elastic counterweight 1 remains unchanged, only its position relative to the target pipe 100 changes, thus achieving more flexible length and position adjustments and providing vibration damping effects for more solid-state components. In a specific embodiment, the elastic counterweight 1 is a metal helical spring, which has a large mass and can provide good counterweight vibration damping effects when its length and position change.

[0027] See Figure 2 As shown, the displacement drive component 2 includes a housing, specifically a bottom shell 201 and a top cover 202, which are fastened together to form a receiving cavity. The housing is fitted onto the target pipe 100. A drive motor 21 is disposed inside the housing, i.e., within the aforementioned receiving cavity. The drive motor 21 is fixedly connected to the housing (specifically, fixedly connected to the bottom shell 201). A drive roller (not shown in the figure) is connected to the output end of the drive motor 21's shaft. The drive roller abuts against the outer wall of the target pipe 100, so that the position adjustment of the displacement drive component 2 can be achieved by utilizing the friction between the drive roller and the target pipe 100 when the drive motor 21 is running. The aforementioned drive roller can specifically be a rubber wheel, which has a large frictional force to ensure the movement purpose.

[0028] The housing cavity is also provided with two movable guide wheels 22, which are rotatably connected to the housing. The two movable guide wheels 22 are arranged opposite to each other and surround part of the outer wall of the target pipe 100 along the circumferential direction. The guide surface of the movable guide wheel 22 is always in contact with the outer wall of the target pipe 100, thereby ensuring that the circumferential position of the displacement drive 2 is relatively stable and reliable relative to the circumferential position of the target pipe 100, and ensuring the reliable transmission of the driving force of the drive motor 21.

[0029] In a preferred embodiment, a position detection component 24 is further provided within the housing cavity. The position detection component 24 can detect the zero point on the target pipe fitting 100. This zero point is also the original position point of the two displacement drive components 2. This original position point corresponds to a preset operating frequency of the compressor. That is, as long as the compressor operates at the preset operating frequency, both position drive components 2 are respectively located at this original position point. Detecting this zero point through the position detection component 24 facilitates accurate control of the two displacement drive components 2 to move to the position corresponding to the operating frequency when the compressor operating frequency changes. Specifically, each time the compressor operating frequency changes, the two displacement drive components 2 can be controlled to return to the zero point, and based on this position, the two drive motors 21 can be further controlled to run a corresponding distance until they stop at the position corresponding to the changed operating frequency. The aforementioned position detection component 24 can specifically be a proximity switch, with a corresponding protrusion set at the corresponding zero point. When the proximity switch is at the zero point, it will trigger a switching signal, thereby determining the zero point.

[0030] In another preferred embodiment, a positioning device (not shown in the figure) is also provided inside the housing. The positioning device includes a positioning block 23, which has a positioning position that abuts against the outer wall of the target pipe 100 and a moving position that disengages from the outer wall of the target pipe 100. During the operation of the drive motor 21 to move the displacement drive member 2, the positioning block 23 is in the moving position. When the drive motor 21 stops operating, the positioning block 23 is in the positioning position, so as to reliably position the displacement drive member 2 at the corresponding position. As a feasible embodiment, the positioning block 23 is slidably connected to the outer shell. The positioning device also includes an electromagnetic drive (not shown in the figure). The positioning block 23 and the electromagnetic drive are arranged sequentially from the inside to the outside along the radial direction of the target tube 100. A magnet is provided on the side of the positioning block 23 facing the electromagnetic drive. The aforementioned electromagnetic drive can specifically be an energized coil. When the energized coil is energized so that the polarity of the electromagnetic drive is the same as that of the magnet, a repulsive force is generated between the two, and the positioning block 23 is in the positioning position. When the energized coil is energized so that the polarity of the electromagnetic drive is opposite to that of the magnet, an attractive force is generated between the two, and the positioning block 23 is in the moving position.

[0031] According to an embodiment of the present invention, a control method for the pipeline counterweight structure as described above is also provided, comprising the following steps:

[0032] To obtain the real-time operating frequency of the compressor, specifically, in order to simplify the structure and control, the operating frequency control parameters of the compressor in the control command can be read directly. Of course, it can also be obtained through detection by corresponding sensing components. The specific acquisition method is not particularly limited in this invention.

[0033] Based on the acquired real-time operating frequency, the displacement drive 2 is controlled to move along the length extension direction of the target pipe 100, and the displacement drive 2 is controlled to stop moving when it reaches the target position. The target position is the position corresponding to the minimum value of the peak and average value of the pipeline vibration response at the real-time operating frequency. In this way, the optimized correspondence between the target pipe 100 and the real-time operating frequency of the compressor is achieved, so that at each operating frequency, the counterweight structure can ensure that the peak and average values ​​of the vibration response of the target pipe 100 are both at their minimum values, thereby improving the vibration reduction effect.

[0034] In a specific embodiment, the positions corresponding to the peak and minimum values ​​of the pipeline vibration response at the real-time operating frequency are obtained through modeling and simulation of the target pipe component 100 and the displacement drive component 2. Specifically, firstly, a finite element analysis model of the compressor pipeline system is established, and the peak and minimum values ​​of the vibration response of the target pipe component 100 at different compressor frequencies are calculated. Using the positions of the two displacement drive components 2 on the target pipe component 100 as optimization parameters, and the minimum value of the peak and minimum values ​​of the vibration response of the target pipe component 100 as the optimization objective, the positions of the two displacement drive components 2 on the target pipe component 100 at different compressor operating frequencies are obtained. Then, in specific applications, the pipeline counterweight structure of the present invention (i.e., the two displacement drive components 2 and the elastic counterweight 1) is installed on the target pipe component 100. When the variable frequency compressor operates at different frequencies, the two displacement drive components 2 automatically move to the optimal position, reducing the peak and minimum values ​​of the pipeline vibration response, thereby achieving a better vibration reduction and noise reduction effect. It is understandable that in the finite element analysis model, each position at each operating frequency is marked with a corresponding distance based on the position zero point mentioned above, so that the position corresponding to the changed operating frequency can be clearly determined by driving the corresponding drive motor 21 to run the corresponding distance. On the target pipe fitting 100, it is only necessary to mark and calibrate the position zero points corresponding to the two position drive components 2 respectively.

[0035] When the pipeline counterweight structure includes a drive motor 21 and a positioning block 23, the positioning block 23 is controlled to be in a moving position when the drive motor 21 is running, and the positioning block 23 is controlled to be in a fixed position when the drive motor 21 stops running.

[0036] like Figure 4 As shown, this is a comparison of the vibration response at the monitoring point of the pipeline under different pipeline counterweight structures. The existing counterweight optimization scheme can reduce the pipeline vibration response at some frequencies, but it also adds peak values ​​of pipeline vibration response at other frequencies. Furthermore, under the existing pipeline counterweight device, the pipeline vibration response at this detection point is reduced, but the vibration response at other locations in the pipeline may actually increase. Therefore, the existing pipeline counterweight cannot achieve the ideal vibration reduction effect. In contrast, the pipeline counterweight structure of this application can effectively reduce the overall vibration response of the pipeline across the entire operating frequency range of the compressor, and the beneficial effect is very obvious.

[0037] According to an embodiment of the present invention, an air conditioner is also provided, including the above-described pipe counterweight structure.

[0038] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A plumbing counterweight structure, characterized by, The device includes a target pipe fitting (100), on which an elastic counterweight (1) and a displacement drive (2) are provided. The displacement drive (2) is capable of linear movement along the length extension direction of the target pipe fitting (100) to pull or push back the elastic counterweight (1) to change the length of the elastic counterweight (1) and the position of the elastic counterweight (1) relative to the target pipe fitting (100).

2. The plumbing counterweight structure of claim 1, wherein, The displacement drive element (2) has two parts, and the two displacement drive elements (2) are respectively connected to the two ends of the elastic counterweight (1).

3. The plumbing counterweight structure of claim 2, wherein, Each of the displacement drive components (2) can be independently controlled to operate; and / or, the elastic counterweight (1) is a metal helical spring.

4. The plumbing counterweight structure of claim 1, wherein, The displacement drive component (2) includes a housing, which is fitted onto the target pipe (100). A drive motor (21) is provided inside the housing. The drive motor (21) is fixedly connected to the housing. A drive roller is connected to the output end of the shaft of the drive motor (21). The drive roller is abutted against the outer wall of the target pipe (100).

5. The pipeline counterweight structure according to claim 4, characterized in that, The housing is also provided with two movable guide wheels (22), which are rotatably connected to the housing. The two movable guide wheels (22) are arranged opposite to each other and surround part of the outer wall of the target pipe (100) along the circumferential direction. And / or, the housing is also provided with a position detection component (24), which can detect the zero point of the target pipe (100).

6. The pipeline counterweight structure according to claim 4, characterized in that, The housing is also provided with a positioning device, which includes a positioning block (23). The positioning block (23) has a positioning position that abuts against the outer wall of the target pipe (100) and a moving position that disengages from the outer wall of the target pipe (100). During the operation of the drive motor (21) to move the displacement drive member (2), the positioning block (23) is in the moving position. When the drive motor (21) stops operating, the positioning block (23) is in the positioning position.

7. The pipeline counterweight structure according to claim 6, characterized in that, The positioning block (23) is slidably connected to the outer shell. The positioning device also includes an electromagnetic drive component. The positioning block (23) and the electromagnetic drive component are arranged alternately from the inside to the outside along the radial direction of the target pipe (100). The positioning block (23) is provided with a magnet on the side facing the electromagnetic drive component.

8. A control method for a pipeline counterweight structure as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Obtain the real-time operating frequency of the compressor; The displacement drive (2) is controlled to move along the length extension direction of the target pipe (100) according to the obtained real-time operating frequency, and the displacement drive (2) is controlled to stop moving when it reaches the target position. The target position is the position corresponding to the peak value and the minimum average value of the pipeline vibration response at the real-time operating frequency.

9. The control method for the pipeline counterweight structure according to claim 8, characterized in that, The positions corresponding to the peak value and the minimum mean value of the pipeline vibration response at the real-time operating frequency are obtained by modeling and simulating the target pipe fitting (100) and the displacement drive component (2).

10. The control method for the pipeline counterweight structure according to claim 8, characterized in that, When the pipeline counterweight structure includes a drive motor (21) and a positioning block (23), the positioning block (23) is controlled to be in a moving position when the drive motor (21) is running, and the positioning block (23) is controlled to be in a positioning position when the drive motor (21) stops running.

11. An air conditioner, characterized in that, The pipeline counterweight structure includes any one of claims 1 to 7.

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