Compressor damping device, compressor and damping control method of compressor

Abstract

The invention discloses a compressor damping device, a compressor and a damping control method of the compressor. The compressor damping device comprises a damping module, a heat conduction frame and a heating module. The vibration reduction module comprises a base and an SMA material body arranged on the base, the base is used for being fixed to the mounting body, and the SMA material body is used for being connected with a footing of the compressor. One end of the heat conduction frame is connected with the SMA material body, and the other end of the heat conduction frame is connected to the surface of a shell of the compressor so as to transfer heat generated by operation of the compressor to the SMA material body. The heating module is connected to the SMA material body and used for heating the SMA material body to change the phase change state. According to the device, the waste heat of the compressor is recycled to the SMA material body through the heat conduction frame, the SMA material body is located in a performance sensitive standby area for a long time, the heating module is matched for active compensation, it is ensured that the SMA material body rapidly responds under different working conditions, efficient vibration reduction is achieved, energy consumption can be remarkably reduced, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of compressor vibration damping devices, and particularly to a compressor vibration damping device, a compressor, and a vibration damping control method thereof. Background Technology

[0002] During the operation of an air conditioner, the compressor, as a core power component, has a significant impact on the overall performance, service life, and noise control of the unit. Currently, air conditioner compressor vibration reduction mainly relies on rubber pads for support and vibration damping. However, traditional rubber vibration damping solutions have the following technical drawbacks in practical applications: the vibration damping performance of rubber materials is significantly constrained by environmental factors. In harsh environments such as high temperature and humidity, strong ultraviolet radiation, salt spray corrosion, or extreme temperature differences, they are prone to aging, hardening, or softening, leading to decreased elasticity, significantly reduced vibration damping performance, and a drastically shortened service life. Simultaneously, rubber pads have nonlinear stiffness characteristics, which can easily induce resonance when the compressor's operating frequency approaches its natural frequency, amplifying vibration and noise, especially under low-frequency or high-frequency operating conditions, making it difficult to provide stable and effective vibration damping.

[0003] To overcome the aforementioned problems, existing technologies attempt to introduce shape memory alloys (SMA) as intelligent vibration damping materials. SMA possesses excellent resistance to extreme environments, fatigue resistance, and recyclability, theoretically suitable for the long-term vibration damping requirements of air conditioning compressors. However, existing SMA vibration damping solutions still have the following shortcomings in practical applications: the phase change capability of SMA elements becomes passivated at low temperatures, resulting in sluggish response and an inability to quickly switch to a high-stiffness, high-damping state. This makes it difficult to adapt to the vibration damping requirements of compressors under different operating conditions (such as low-frequency and high-frequency operation), leading to unstable vibration damping effects and an inability to provide reliable vibration protection for the compressor. Therefore, there is an urgent need for a compressor vibration damping device that can adapt to extreme environments and different operating conditions, with rapid response and stable performance. Summary of the Invention

[0004] The embodiments of the present invention provide a compressor vibration reduction device, a compressor and a vibration reduction control method thereof, which aims to solve the problem that the existing SMA vibration reduction scheme cannot adapt to different working conditions.

[0005] In a first aspect, the present invention provides a compressor vibration damping device, comprising: a vibration damping module including a base and an SMA material body disposed on the base, the base being fixed to a mounting body, and the SMA material body being connected to the base foot of the compressor; a heat conduction frame, one end of which is connected to the SMA material body and the other end of which is connected to the housing surface of the compressor, the heat conduction frame being used to transfer the heat generated by the operation of the compressor to the SMA material body; and a heating module connected to the SMA material body for heating the SMA material body to change its phase change state.

[0006] Furthermore, the heat-conducting frame includes a heat-collecting ring and a heat-transfer rod. The heat-collecting ring is used to fit onto the housing surface of the compressor, and one end of the heat-transfer rod is connected to the heat-collecting ring, while the other end is connected to the SMA material body.

[0007] Furthermore, the vibration damping module is provided in multiple ways, and the number of heat transfer rods is the same as the number of vibration damping modules. One end of each heat transfer rod is connected at equal intervals in the circumferential direction of the heat-collecting ring, and the other end of each heat transfer rod is respectively connected to the SMA material body of the corresponding vibration damping module.

[0008] Furthermore, all of the vibration damping modules are arranged at equal intervals in the circumferential direction.

[0009] Furthermore, the vibration damping module also includes an elastic material body disposed on the top of the SMA material body, and an adapter disposed on the elastic material body, the adapter being used to connect and fix with the base of the compressor.

[0010] Furthermore, the heating module includes a drive circuit assembly and a heating wire. The heating wire is uniformly disposed on the base and is in thermal contact with the SMA material. The drive circuit assembly is connected to the heating wire and is used to drive the heating wire to generate heat.

[0011] Furthermore, a temperature sensor is provided on the SMA material body to detect the temperature of the SMA material body.

[0012] Furthermore, the SMA material body is a nickel-titanium alloy.

[0013] In a second aspect, the present invention provides a compressor comprising the compressor vibration damping device described in the first aspect, wherein the bottom of the compressor is provided with a base foot, and the base foot is connected to the SMA material body of the compressor vibration damping device.

[0014] Thirdly, the present invention provides a compressor vibration reduction control method, applied to the compressor described in the second aspect, the method comprising: acquiring the current operating frequency of the compressor and acquiring the current ambient temperature; determining a target heating power based on the current operating frequency and the current ambient temperature; and controlling the heating module to heat at the target heating power.

[0015] Compared with the prior art, the compressor vibration reduction device of this application, by setting up a vibration reduction module, a heat conduction frame and a heating module, uses the heat conduction frame to recover the waste heat generated by the compressor operation and conduct it to the SMA material body. With the active heating compensation of the heating module, the SMA material body is always in the performance-sensitive standby zone or the austenitic stable zone, thereby realizing adaptive vibration reduction for different working conditions, improving the vibration reduction response speed and stability, reducing energy consumption and extending the service life of the vibration reduction device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A perspective view of the compressor vibration damping device provided in an embodiment of the present invention; Figure 2 This is a side view of the compressor vibration damping device provided in an embodiment of the present invention; Figure 3 This is a top view of the compressor vibration damping device provided in an embodiment of the present invention; Figure 4 A perspective view of the vibration reduction module provided in an embodiment of the present invention; Figure 5 This is a side view of the vibration damping module provided in an embodiment of the present invention; Figure 6 This is a side view of the compressor in its assembled state according to an embodiment of the present invention; Figure 7 This is another side view of the compressor in its assembled state according to an embodiment of the present invention; Figure 8 This is a top view of the compressor in its assembled state according to an embodiment of the present invention; Figure 9 A flowchart illustrating the steps of the method provided in this embodiment of the invention; Figure 10 A flowchart of the sub-steps of the method provided in the embodiments of the present invention; Figure 11 A flowchart of the sub-steps of the method provided in the embodiments of the present invention; Figure 12 A flowchart illustrating the steps of the method provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 100. Compressor vibration damping device; 10. Vibration damping module; 11. Base; 12. SMA material body; 13. Elastic material component; 14. Adapter; 20. Heat conduction frame; 21. Heat collection ring; 22. Heat transfer rod; 30. Heating module; 200. Compressor; 210. Base foot; 300. Mounting body. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0021] Please see Figures 1 to 3 ,as well as Figures 6 to 8 This invention provides a compressor vibration damping device, comprising: a vibration damping module 10, including a base 11 and an SMA material body 12 disposed on the base 11, the base 11 being fixed to a mounting body 300, and the SMA material body 12 being connected to the base foot 210 of a compressor 200; a heat conduction frame 20, one end of which is connected to the SMA material body 12, and the other end of which is connected to the housing surface of the compressor 200, the heat conduction frame 20 being used to transfer the heat generated by the operation of the compressor 200 to the SMA material body 12; and a heating module 30, connected to the SMA material body 12, for heating the SMA material body 12 to change its phase change state.

[0022] In practice, the core design of the compressor vibration damping device is to recover the waste heat generated by the operation of the compressor 200 through the heat conduction frame 20 and conduct it to the SMA material body 12. At the same time, the heating module 30 is used for active heating compensation, so that the SMA material body 12 is always in the performance sensitive standby zone (i.e. the critical temperature range of the martensite to austenite phase transformation), thereby improving its response speed and vibration damping performance stability.

[0023] Specifically, see Figures 1 to 3 The compressor vibration damping device in this embodiment mainly consists of a vibration damping module 10, a heat conduction frame 20, and a heating module 30. The vibration damping module 10 includes a base 11 and an SMA material body 12. The base 11 is made of high-strength materials such as stainless steel or aluminum alloy, and its bottom is provided with mounting holes or a positioning structure. The base 11 is used to fix to the mounting body 300 (see [link]). Figures 6 to 8The mounting body 300 can be the chassis of the outdoor unit of the air conditioner or other structures that require the installation of the compressor. The base 11 can be fixed to the mounting body 300 by bolts or other means. The SMA material body 12 is located above the base 11 and can be made of shape memory alloy materials such as nickel-titanium alloy (NiTi), which has good superelasticity and damping characteristics. The SMA material body 12 is connected to the base 210 of the compressor 200 (see...). Figures 6 to 8 The connection can be formed, either through direct contact installation or indirectly through an elastic material body or adapter 14, to buffer vibration loads and avoid stress concentration.

[0024] The heat-conducting bracket 20 is made of a material with high thermal conductivity, such as copper or aluminum alloy. One end is fixedly connected to the side or bottom of the SMA material body 12, and the other end extends to and fits against the housing surface of the compressor 200 (see...). Figures 6 to 8 The heat-conducting frame 20 can be designed with a heat-collecting ring 21 and a heat-transfer rod 22. The heat-collecting ring 21 is fitted onto the cylindrical shell of the compressor 200, and the heat-transfer rod 22 transfers the heat collected by the heat-collecting ring 21 to the SMA material body 12. When the compressor 200 is running, its shell surface temperature can reach 40°C to 90°C. This waste heat is efficiently transferred to the SMA material body 12 through the heat-conducting frame 20 by heat conduction, allowing the SMA material body 12 to be continuously preheated, thereby maintaining its temperature within the standby zone without consuming additional electrical energy. When the compressor 200 is running in a low-temperature environment or at low frequency, the waste heat is insufficient to maintain the SMA material body 12 in the standby zone. In this case, the heating module 30 is activated to actively heat the SMA material body 12 through electric heating wires or other means, ensuring that its temperature is stable within the phase transformation sensitive range (such as 35°C to 45°C) or the austenite stable range (45°C to 90°C). The power of the heating module 30 can be dynamically adjusted according to the operating frequency of the compressor 200, the ambient temperature, and the real-time temperature of the SMA material body 12, so as to achieve a balance between energy saving and rapid response.

[0025] When the compressor 200 is operating normally, the SMA material body 12 is in a martensitic dominant state, with low stiffness and high damping, which can effectively absorb the daily vibration energy generated by the compressor 200 and provide flexible vibration reduction. When the compressor 200 is operating at low frequencies (e.g., below 40Hz) or high frequencies (e.g., above 65Hz), the system controls the heating module 30 to appropriately increase the heating power, raising the temperature of the SMA material body 12 to the austenitic phase transformation region, which dramatically increases its stiffness and damping capacity, thereby suppressing resonance and abnormal vibration. Upon receiving an earthquake early warning signal, the heating module 30 heats at full speed with maximum power, causing the SMA material body 12 to complete the phase transformation within seconds, entering a high-stiffness, high-damping state. This forms a reaction force with the base 210 of the compressor 200 and the mounting body 300, quickly locking the compressor 200 and providing seismic protection.

[0026] Overall, this embodiment utilizes the combined action of the vibration damping module 10, the heat conduction frame 20, and the heating module 30 to passively preheat using the waste heat of the compressor 200, supplemented by active electric heating compensation, so that the SMA material body 12 is always in the performance-sensitive standby zone. This achieves adaptive vibration damping for different working conditions, significantly improves the vibration damping response speed, stability, and energy efficiency, and extends the service life.

[0027] In one embodiment, reference is made to Figures 1 to 3 The heat-conducting frame 20 includes a heat-collecting ring 21 and a heat-transfer rod 22. The heat-collecting ring 21 is used to fit onto the housing surface of the compressor 200. One end of the heat-transfer rod 22 is connected to the heat-collecting ring 21, and the other end is connected to the SMA material body 12.

[0028] In specific implementation, the heat-conducting frame 20 is constructed as a combination of a heat-collecting ring 21 and a heat-transfer rod 22. The heat-collecting ring 21 is made of a high thermal conductivity metal material (such as copper or aluminum alloy), and its inner diameter matches the surface of the cylindrical housing of the compressor 200, for tightly fitting onto the outer periphery of the compressor 200 housing (see [reference]). Figure 6 and Figure 7 The inner wall of the heat-collecting ring 21 can be configured as a smooth curved surface or a contact surface coated with thermally conductive silicone grease to reduce contact thermal resistance and improve heat collection efficiency. The installation position of the heat-collecting ring 21 on the compressor 200 housing can be selected according to actual needs, for example, it can be located near 1 / 3 of the height of the compressor 200 housing, where the temperature is high and stable during compressor 200 operation, and sufficient waste heat can be obtained.

[0029] The heat transfer rod 22 is also made of a highly thermally conductive material. One end is fixedly connected to the outer wall of the heat-collecting ring 21, and the other end extends to the vibration damping module 10 and connects to the SMA material body 12. The heat transfer rod 22 can be designed as a solid rod structure or a hollow tubular structure, and its cross-sectional shape can be circular, rectangular, or other shapes that facilitate wiring. To reduce heat loss during the transfer process, the outer surface of the heat transfer rod 22 can be covered with a heat insulation layer (such as fiberglass or aerogel insulation material) to ensure efficient heat conduction to the SMA material body 12.

[0030] When the compressor 200 is running, the heat generated on the surface of the casing is first absorbed by the heat-collecting ring 21. After the temperature of the heat-collecting ring 21 rises, the heat is rapidly transferred to the SMA material body 12 along the heat transfer rod 22. Since the heat-collecting ring 21 surrounds the casing of the compressor 200, it can collect heat from multiple directions, and the collection efficiency is higher than that of a single-point contact heat conduction structure. At the same time, when the vibration damping module 10 has multiple (e.g., three or four) arranged at equal intervals along the circumference, a corresponding number of heat transfer rods 22 can be set. One end of each heat transfer rod 22 is connected at equal intervals along the circumference of the heat-collecting ring 21, and the other end is connected to the corresponding SMA material body 12 of the vibration damping module 10, thereby achieving uniform preheating of each SMA material body 12.

[0031] Through the combined design of the heat-collecting ring 21 and the heat transfer rod 22, the heat-conducting frame 20 can stably and efficiently transfer the waste heat from the compressor 200 to the SMA material body 12, achieving passive preheating without additional energy consumption. This keeps the SMA material body 12 in the performance-sensitive standby zone for a long time, laying the foundation for subsequent active heating compensation and rapid phase change response.

[0032] Furthermore, referring to Figures 1 to 3 The vibration damping module 10 is provided in multiple ways. The number of heat transfer rods 22 is the same as the number of vibration damping modules 10. One end of each heat transfer rod 22 is connected at equal intervals in the circumferential direction of the heat-collecting ring 21, and the other end of each heat transfer rod 22 is respectively connected to the SMA material body 12 corresponding to the vibration damping module 10.

[0033] In practical implementation, to achieve uniform support and multi-point coordinated vibration reduction for the compressor 200 base 210, multiple vibration reduction modules 10 are configured, such as three or four. See also Figures 2 to 4 Taking three vibration damping modules 10 as an example, the three vibration damping modules 10 are arranged at equal intervals along the circumference of the compressor 200, respectively located below the three mounting points of the compressor 200 base 210. The SMA material body 12 of each vibration damping module 10 is connected to the corresponding compressor 200 base 210. Correspondingly, the number of heat transfer rods 22 is the same as the number of vibration damping modules 10, which is three. One end of each heat transfer rod 22 is connected at equal intervals in the circumferential direction of the heat collection ring 21, that is, the included angle between adjacent heat transfer rods 22 is 120°, and the other end of each heat transfer rod 22 extends downward and connects to the SMA material body 12 of the corresponding vibration damping module 10.

[0034] By distributing multiple heat transfer rods 22 at equal intervals on the heat-collecting ring 21, the heat collected by the heat-collecting ring 21 from the compressor 200 housing can be evenly transferred to the SMA material body 12 of each vibration damping module 10 via each heat transfer rod 22. This ensures that all SMA material bodies 12 receive a basically consistent preheating temperature, avoiding inconsistent vibration damping performance due to temperature differences. Simultaneously, the equal-interval arrangement of multiple vibration damping modules 10 in the circumferential direction ensures a uniform distribution of the supporting force on the compressor 200 base 210, resulting in a more balanced overall force on the vibration damping device and improving the operational stability of the compressor 200. Furthermore, when the operating frequency of the compressor 200 changes or emergency protection is required, the heating modules 30 of each vibration damping module 10 can operate synchronously, causing all SMA material bodies 12 to simultaneously enter a high-stiffness, high-damping state. This achieves overall locking of the compressor 200 or enhanced vibration damping, further improving the overall performance of the vibration damping device.

[0035] Furthermore, referring to Figure 3 All of the vibration damping modules 10 are arranged at equal intervals in the circumferential direction.

[0036] In specific implementation, the number of vibration damping modules 10 is set according to the number of bases 210 of the compressor 200. Typically, the bases 210 of the compressor 200 are evenly spaced circumferentially. To ensure a uniform distribution of the supporting force on the bases 210 and to ensure that the SMA material bodies 12 of each vibration damping module 10 can absorb vibration energy synchronously and evenly, all vibration damping modules 10 are arranged at equal intervals along the circumference of the compressor 200. Taking three vibration damping modules 10 as an example, the included angle between two adjacent vibration damping modules 10 is 120°; taking four vibration damping modules 10 as an example, the included angle between adjacent modules is 90°. This evenly spaced layout corresponds to the installation position of the bases 210 of the compressor 200, so that a vibration damping module 10 is provided under each base 210, thereby achieving multi-point balanced support for the compressor 200.

[0037] By arranging the vibration damping modules 10 at equal intervals in the circumferential direction, the vibration load generated by the compressor 200 during operation can be evenly transmitted to each vibration damping module 10, avoiding premature fatigue or damage to individual vibration damping modules 10 due to uneven stress. Simultaneously, the evenly spaced layout also facilitates the balanced heat transfer from the heat-collecting ring 21 to each SMA material body 12 by each heat transfer rod 22, ensuring a consistent temperature field across all SMA material bodies 12 and guaranteeing synchronized and stable vibration damping performance of each vibration damping module 10. Furthermore, this layout is structurally symmetrical and has a reasonable stress distribution, facilitating installation and arrangement within the limited space of the air conditioner outdoor unit, thus improving the overall reliability and assembly convenience of the vibration damping device.

[0038] In one embodiment, reference is made to Figure 4 and Figure 5The vibration damping module 10 also includes an elastic material body disposed on the top of the SMA material body 12, and an adapter 14 disposed on the elastic material body, the adapter 14 being used to connect and fix with the base 210 of the compressor 200.

[0039] In specific implementation, in order to effectively transfer the vibration load of the compressor 200 to the SMA material body 12, and at the same time avoid fatigue damage or local buckling of the SMA material body 12 due to the concentrated stress of the base 210 directly bearing the stress, the vibration damping module 10 adds an elastic material body and a connector 14 to the top of the SMA material body 12. The elastic material body can be made of a material with certain rigidity and elasticity, such as a rubber pad, stainless steel spring, polyurethane elastomer, etc. The elastic material body is set on the upper surface of the SMA material body 12 to buffer the impact load from the base 210 of the compressor 200 and to uniformly transfer the vibration energy to the SMA material body 12 below. The connector 14 is fixedly installed on the top of the elastic material body. The connector 14 can be made of metal (such as stainless steel) and its shape matches the base 210 of the compressor 200. For example, it is provided with a positioning boss or threaded hole to form a reliable fixed connection with the base 210 of the compressor 200.

[0040] During actual assembly, the base 210 of the compressor 200 is locked and fixed to the adapter 14 by bolts or clips. The vibration generated by the compressor 200 during operation first acts on the adapter 14, and then is transmitted to the SMA material body 12 via the elastic material body. While transmitting the load, the elastic material body can absorb some of the high-frequency impact energy and prevent excessive local stress on the SMA material body 12, thus avoiding stress concentration. In addition, the elastic material body can also play an auxiliary role in vibration damping, forming a composite vibration damping structure with the SMA material body 12 to further improve the vibration damping effect. By setting up the elastic material body and the adapter 14, a reliable connection between the compressor 200 base 210 and the vibration damping module 10 is ensured, and the SMA material body 12 is protected from direct mechanical damage, extending the service life of the vibration damping device.

[0041] In one embodiment, the heating module 30 includes a driving circuit assembly and a heating wire (not shown in the figure). The heating wire is uniformly disposed on the base 11 and is in thermal contact with the SMA material body 12. The driving circuit assembly is connected to the heating wire and is used to drive the heating wire to generate heat.

[0042] In specific implementation, to achieve active heating to adjust the phase change state of the SMA material body 12, the heating module 30 is constructed as a combination of heating wire and drive circuit components. The base 11 is made of high thermal conductivity stainless steel or aluminum alloy, and heating wires, such as nickel-chromium alloy heating wires, are evenly distributed inside it. The heating wires can be evenly distributed in the internal cavity of the base 11 or embedded in the upper surface of the base 11 in a spiral, serpentine, or multi-parallel manner to ensure uniform heating. The SMA material body 12 is mounted above the base 11, with its lower surface in close contact with the upper surface of the base 11, so that the heat generated by the heating wire is efficiently transferred to the SMA material body 12 through the base 11 by thermal conduction, forming good thermal contact between the two.

[0043] The drive circuit assembly is electrically connected to the heating wire and provides an adjustable drive current or voltage to the heating wire according to control commands, thereby controlling the heating power of the heating wire. The drive circuit assembly may include a power switch, a PWM modulation circuit, and an overcurrent protection circuit, enabling precise adjustment of the heating power. When the system determines that active heating is required (e.g., when the compressor 200 is operating normally in a low-temperature environment, or when the compressor 200 is operating at low or high frequencies, or when an earthquake early warning signal is received), the drive circuit assembly outputs corresponding electrical power to the heating wire. The heating wire is energized and heats up, and the heat is conducted through the base 11 to the SMA material body 12, raising its temperature to the target range (e.g., the austenitic phase transformation region 45°C to 90°C). By uniformly distributing the heating wire on the base 11, uniform heating of the SMA material body 12 is ensured, avoiding inconsistent phase transformation caused by local overheating or undercooling, thereby improving the stability and response speed of the vibration damping performance.

[0044] In one embodiment, a temperature sensor (not shown) is provided on the SMA material body 12 for detecting the temperature of the SMA material body 12.

[0045] In practice, to achieve accurate monitoring and control of the temperature of the SMA material body 12 and provide closed-loop feedback for the heating module 30, a temperature sensor is installed on the SMA material body 12. The temperature sensor can be a high-precision NTC thermistor, thermocouple, or digital temperature sensor chip, which is attached to the surface of the SMA material body 12 or embedded inside the SMA material body 12 near its edge to ensure that the measured temperature accurately reflects the body temperature of the SMA material body 12. The temperature sensor is electrically connected to a controller (e.g., an air conditioning main control board or a dedicated vibration damping controller) to collect and upload the temperature data of the SMA material body 12 in real time.

[0046] When the temperature sensor detects that the temperature of the SMA material body 12 is lower than the preset target temperature range (e.g., the starting temperature As for the transformation from martensite to austenite), the controller will start the heating module 30 for active heating; when the temperature is detected to have risen to the target range or exceeded the austenite termination temperature Af (e.g., 100°C), the controller will reduce the heating power or stop heating to prevent the SMA material body 12 from undergoing phase transformation fatigue or performance degradation due to overheating.

[0047] Through real-time monitoring and feedback from temperature sensors, the control system can perform closed-loop control of the heating process of the SMA material body 12, ensuring it remains in the optimal performance-sensitive standby zone or austenitic stable zone. This guarantees that the vibration damping device can respond quickly and operate stably under different working conditions. Simultaneously, the temperature sensors can also be used for over-temperature protection. When the detected temperature exceeds a safe threshold (e.g., 100℃), the system automatically cuts off the heating power supply to ensure the safe operation of the device.

[0048] In one embodiment, the SMA material body 12 is a nickel-titanium alloy.

[0049] In specific implementation, the SMA material body 12 uses a nickel-titanium alloy. Nickel-titanium alloy (NiTi alloy) is a shape memory alloy material with excellent superelasticity, shape memory effect, and high damping characteristics. By adjusting the nickel-titanium ratio or adding small amounts of copper, iron, cobalt, and other elements, its phase transformation temperature window can be precisely set. For example, the martensite termination temperature (Mf) can be set to 35℃, the austenite initiation temperature (As) to 45℃, and the austenite termination temperature (Af) to 90℃ to 100℃. The SMA material body 12 made of nickel-titanium alloy has a damping coefficient in the phase transformation region (45℃ to 90℃) that is 3 to 5 times that of traditional rubber materials, effectively absorbing the vibration energy generated by the compressor 200. Simultaneously, nickel-titanium alloy has good corrosion resistance, fatigue resistance, and biocompatibility, maintaining stable mechanical properties even in extreme environments of high temperature (above 70℃) and low temperature (below -40℃), without aging, hardening, or cracking. In addition, nickel-titanium alloys can be recycled and reused through smelting, with a recycling rate of over 90%, and they do not contain harmful substances such as halogens or heavy metals, which meets the requirements of green manufacturing and sustainable development.

[0050] This embodiment achieves long life, high reliability, strong environmental adaptability and recyclability by selecting nickel-titanium alloy as the SMA material body 12.

[0051] In summary, the compressor vibration reduction device of this embodiment of the invention, by setting up a vibration reduction module, a heat conduction frame and a heating module, utilizes the heat conduction frame to recover the waste heat generated by the compressor operation and conduct it to the SMA material body. Combined with the active heating compensation of the heating module, the SMA material body is always in the performance-sensitive standby zone or the austenitic stable zone, thereby achieving adaptive vibration reduction for different operating conditions, improving the vibration reduction response speed and stability, reducing energy consumption and extending the service life of the vibration reduction device.

[0052] See Figures 6 to 8 The present invention also provides a compressor 200, which includes the compressor vibration damping device 100 described in any of the above embodiments. The compressor 200 has a base 210 at its bottom, and the base 210 is connected to the SMA material body 12 of the compressor vibration damping device 100.

[0053] In practice, the compressor 200 typically has three or four equally spaced feet 210 at its bottom along the circumference. Each foot 210 is connected to the SMA material body 12 of the corresponding vibration damping module 10. Taking three feet 210 as an example, the three vibration damping modules 10 are arranged at 120° intervals along the circumference. Each vibration damping module 10 has an elastic material body and a connector 14 above its SMA material body 12. The feet 210 are fixed to the connector 14 with bolts. The connector 14 evenly transfers the load to the SMA material body 12 through the elastic material body, avoiding local stress concentration and ensuring that the compressor 200 is horizontally fixed.

[0054] When the compressor 200 is running, the vibration load is transmitted to the SMA material body 12. At room temperature or low temperature, the SMA material body 12 is mainly martensitic, with low stiffness and high damping, which can effectively absorb the broadband vibration generated during daily operation and achieve flexible vibration reduction. At this time, the heat collection ring 21 in the heat conduction frame 20 is sleeved on the surface of the compressor 200 shell, collecting waste heat (40℃ to 90℃) and conducting it to the SMA material body 12 through the heat transfer rod 22, so that its temperature is maintained in the standby range of 35℃ to 45℃. The heating module 30 does not need to be started or only operates at very low power, achieving energy saving and vibration reduction.

[0055] When the compressor 200 operates at a frequency deviating from the normal range (e.g., below 40Hz or above 65Hz), vibrations become concentrated, easily leading to resonance. Based on the operating frequency and temperature sensor feedback, the control system activates the heating module 30 for active heating, raising the temperature of the SMA material bulk 12 to the austenitic phase transformation region of 45℃ to 90℃. At this temperature, the stiffness increases dramatically (up to 10 times that of the martensitic phase), damping capacity is enhanced, and resonance is effectively suppressed. The heating power is dynamically adjusted according to the frequency deviation: the greater the deviation, the greater the power, achieving adaptive locking or strong damping vibration reduction.

[0056] The compressor in this embodiment, integrated with the aforementioned vibration damping device, possesses adaptive vibration damping capabilities. During normal operation, it utilizes waste heat to achieve zero-energy flexible vibration damping, while during low-frequency or high-frequency operation, it actively heats up to increase stiffness and suppress resonance. This compressor is particularly suitable for inverter air conditioners and air conditioning equipment operating in extreme environments, significantly reducing operating noise, improving operational stability, and extending the overall lifespan of the unit.

[0057] Please see Figure 9 The present invention also provides a compressor vibration reduction control method, which is applied to the compressor described in the foregoing embodiments. Figure 9 As shown, the method includes steps S110-S130.

[0058] S110. Obtain the current operating frequency of the compressor and the current ambient temperature; S120. Determine the target heating power based on the current operating frequency and the current ambient temperature; S130, Control the heating module to heat at the target heating power.

[0059] In practice, this control method aims to dynamically adjust the output power of the heating module by monitoring the compressor's operating status and environmental conditions, ensuring that the SMA material remains within the temperature range required for optimal vibration damping performance. The control method is executed by an air conditioning controller or a dedicated vibration damping controller.

[0060] First, the control system acquires the compressor's current operating frequency in real time. This frequency is obtained from the air conditioner's main control board via feedback signals from the inverter driver, reflecting the compressor's current load status and speed level. Simultaneously, the system obtains the current ambient temperature through an ambient temperature sensor located inside or outside the outdoor unit. Ambient temperature is a crucial factor in determining whether the compressor's waste heat is sufficient and whether active heating compensation is needed.

[0061] Secondly, the controller determines the target heating power based on the current operating frequency and ambient temperature. Specifically, the controller has preset logic for different operating modes. When the compressor operating frequency is within the normal range (e.g., 40Hz to 65Hz) and the ambient temperature is not lower than the preset low-temperature threshold (e.g., 10℃), the waste heat generated by the compressor is conducted to the SMA material body through the heat conduction frame, which is sufficient to keep it in the performance-sensitive standby zone (the critical temperature range for the transformation of martensite to austenite, such as 35℃ to 45℃). At this time, the target heating power is set to zero, the heating module does not start, and zero-energy vibration reduction is achieved. When the ambient temperature is lower than the preset low-temperature threshold, the compressor waste heat is insufficient. The controller calculates a lower target heating power based on the difference between the ambient temperature and the low-temperature threshold, and performs slight heating compensation on the SMA material body to keep it in the standby zone. When the compressor's operating frequency deviates from the normal range (e.g., below 40Hz or above 65Hz), it indicates that the compressor is operating at low or high frequencies. This necessitates increasing the stiffness and damping of the SMA material to suppress resonance. The controller calculates a higher target heating power based on the frequency deviation, raising the temperature of the SMA material to the austenitic phase transformation region (45℃ to 90℃), thereby achieving higher stiffness and damping capacity. Furthermore, if the system receives an earthquake early warning signal, the controller directly sets the target heating power to its maximum value, enabling the heating module to operate at full power, achieving a second-level phase transformation of the SMA material and rapid compressor locking.

[0062] Finally, the controller outputs a corresponding control signal to the drive circuit assembly of the heating module. The drive circuit assembly provides drive current or voltage to the heating wire of the heating module according to the target heating power, causing the heating wire to heat up. The heat is then conducted to the SMA material body via the base. During the heating process, a temperature sensor installed on the SMA material body monitors its temperature in real time and feeds it back to the control system. The control system performs closed-loop correction of the target heating power based on the feedback temperature, ensuring that the SMA material body temperature remains stable within the target range and avoiding overheating or overcooling. When the SMA material body temperature is detected to exceed a preset safety threshold (e.g., 100℃), the control system immediately cuts off the heating power and activates over-temperature protection.

[0063] The control method of this embodiment enables the compressor vibration damping device to automatically adjust the heating strategy according to the operating frequency and ambient temperature, realizing intelligent thermal management with waste heat priority and electric heating supplementation. This ensures that the SMA material can respond quickly and maintain stable vibration damping performance under different working conditions, while minimizing the energy consumption of active heating and improving the energy efficiency and reliability of the vibration damping system.

[0064] In one embodiment, such as Figure 10 As shown, step S120 includes steps S121-S125.

[0065] S121. Determine whether the current operating frequency is within a preset frequency range; S122. When the current operating frequency is within the preset frequency range, determine whether the current ambient temperature is less than a preset low temperature threshold. S123. If the current ambient temperature is less than the preset low temperature threshold, the target heating power is calculated according to the first preset algorithm. S124. If the current ambient temperature is greater than or equal to the preset low temperature threshold, then the target heating power is set to zero. S125. When the current operating frequency is not within the preset frequency range, the target heating power is calculated according to the second preset algorithm.

[0066] In practice, to achieve graded decision-making based on compressor operating status and ambient temperature, and to ensure precise matching of heating power, the control system first determines whether the compressor's current operating frequency *n* is within a preset frequency range. This preset frequency range corresponds to the compressor's normal daily operating range, for example, a frequency range with a lower limit of 40Hz and an upper limit of 65Hz. If *n* is between 40Hz and 65Hz, it indicates that the compressor is in normal operating condition, and the vibration energy is at a normal level. In this case, there is no need to significantly increase the stiffness and damping of the SMA material body; it is only necessary to maintain its flexible vibration reduction state dominated by martensite. Under this premise, the control system further determines whether the current ambient temperature *T* is less than a preset low-temperature threshold, for example, 10℃. If the current ambient temperature *T* ≥ 10℃, it indicates that the ambient temperature is moderate. The waste heat generated by the compressor operation is conducted to the SMA material body through the heat conduction frame, which is sufficient to maintain its temperature in the performance-sensitive standby zone of 35℃ to 45℃. Therefore, the control system sets the target heating power to zero, and the heating module is not activated, achieving zero-energy vibration reduction. If the current ambient temperature T < 10℃, it indicates that the ambient temperature is too low and the residual heat of the compressor is insufficient to preheat the SMA material to the standby area. At this time, the controller calculates a lower target heating power according to the first preset algorithm (such as the linear compensation formula) to lightly heat the SMA material and raise its temperature to above the lower limit of the standby area.

[0067] When the control system determines that the current operating frequency n is not within the preset frequency range, for example, n < 40Hz or n > 65Hz, it indicates that the compressor is operating at low or high frequencies. In this condition, vibration energy is concentrated, easily leading to resonance or abnormal noise. Therefore, the SMA material needs to be heated to the austenitic phase transformation region (45℃ to 90℃) to increase its stiffness by more than 10 times and significantly enhance its damping capacity, thereby suppressing vibration. Thus, the controller calculates the target heating power according to the second preset algorithm, which dynamically determines the heating power based on the frequency deviation: the greater the frequency deviation, the higher the required heating power.

[0068] This implementation method uses hierarchical decision-making logic to automatically select the optimal heating strategy according to different operating scenarios, which ensures energy-saving operation under normal operating conditions as well as rapid response and effective vibration reduction under abnormal operating conditions.

[0069] In one embodiment, the step of calculating the target heating power according to the first preset algorithm includes: the target heating power is calculated according to the formula P0=a0×(T1-T)+k0, where P0 is the target heating power, a0 is the power coefficient, T1 is the preset low temperature threshold, T is the current ambient temperature, and k0 is a constant.

[0070] In practice, when the compressor operates within a preset frequency range (i.e., normal operating conditions) and the current ambient temperature is below a preset low-temperature threshold, it indicates that the ambient temperature is too low, and the waste heat generated by the compressor is insufficient to preheat the SMA material to the performance-sensitive standby zone (e.g., 35°C to 45°C). At this time, the control system calculates the required target heating power according to the linear compensation formula P0 = a0 × (T1 - T) + k0. The preset low-temperature threshold T1 can be calibrated based on the phase change characteristics of the SMA material and the actual application environment, for example, set to 10°C. The current ambient temperature T is collected in real-time by a temperature sensor. The lower the T value, the colder the environment, the less waste heat the compressor provides, and the greater the deviation of the SMA material's temperature from the standby zone. The (T1 - T) term in the formula represents the temperature difference between the ambient temperature and the low-temperature threshold; the larger the temperature difference, the greater the required heating compensation. The power coefficient a0 is used to convert the temperature difference into heating power. Its value is related to the heat capacity of the SMA material, the thermal resistance of the heat conduction path, and the heating efficiency of the heating module, and can be determined through experimental calibration, for example, by taking 0.3. The constant k0 is the base heating power, used to ensure that minimal heating compensation is still provided when the temperature difference is zero (i.e., T = T1) to avoid the SMA material body frequently entering and leaving the standby zone due to critical fluctuations. k0 can be set to a small positive value, such as 2W to 5W, according to the system standby power consumption and the insulation requirements of the SMA material body.

[0071] Using the above formula, the control system can continuously and linearly adjust the target heating power according to the real-time changes in ambient temperature, achieving smooth low-temperature compensation heating. This avoids energy waste and ensures that the SMA material is always in the performance-sensitive standby zone in cold environments, preparing for rapid response to external vibrations.

[0072] In one embodiment, such as Figure 11 As shown, step S125 includes steps S1251-S1252.

[0073] S1251. If the current operating frequency is less than the minimum boundary value of the preset frequency range, the target heating power is calculated according to the formula P1=a1×(n1-n)+k1, where P1 is the target heating power, a1 is the power coefficient, n1 is the minimum boundary value, n is the current operating frequency, and k1 is a constant. S1252. If the current operating frequency is greater than the maximum boundary value of the preset frequency range, the target heating power is calculated according to the formula P2=a1×(n-n2)+k2, where P2 is the target heating power, a1 is the power coefficient, n2 is the maximum boundary value, n is the current operating frequency, and k2 is a constant.

[0074] In practice, when the compressor's current operating frequency is lower than the minimum boundary value of the preset frequency range (e.g., 40Hz), the compressor is in a low-frequency operating state. At this time, the vibration energy is concentrated and the frequency is low, which can easily cause resonance close to the natural frequency of the vibration reduction system. Therefore, the SMA material needs to be heated to the austenitic phase transformation region to improve stiffness and damping. The control system calculates the target heating power according to the formula P1=a1×(n1-n)+k1. Here, n1 is the minimum boundary value (e.g., 40Hz), n is the current operating frequency, and the difference (n1 - n) reflects the degree of frequency deviation. The greater the deviation, the higher the required heating power to allow the SMA material to enter a high-stiffness state more quickly. The power coefficient a1 depends on the thermal response characteristics of the SMA material and the power output capability of the heating module, and can be calibrated experimentally, for example, by taking 0.5. The constant k1 is the base heating power, ensuring that a minimum heating amount can still be provided when the frequency is close to n1, avoiding response delay due to control dead zones.

[0075] When the compressor operates at a frequency higher than the maximum boundary value of the preset frequency range (e.g., 65Hz), the compressor is in a high-frequency operating state. At this time, vibration energy is concentrated and the frequency is high, requiring an increase in the stiffness and damping of the SMA material to suppress high-frequency vibration. The controller calculates the target heating power according to the formula P2 = a1 × (n - n2) + k2. Here, n2 is the maximum boundary value (e.g., 65Hz), and the difference (n - n2) reflects the degree to which the frequency exceeds the upper limit; the greater the exceedance, the higher the required heating power. The power coefficient a1 can be the same as in the low-frequency case to ensure consistent control. The constant k2 is also the base heating power, ensuring that the heating module can intervene promptly when the frequency is slightly higher than n2.

[0076] This implementation can dynamically adjust the heating power according to the degree to which the compressor frequency deviates from the normal range, achieving adaptive control where the greater the frequency deviation, the stronger the heating. This allows the SMA material to quickly obtain sufficient stiffness and damping under low-frequency or high-frequency conditions, effectively suppressing resonance and abnormal vibration. At the same time, it automatically reduces the heating power after the frequency returns to the normal range, avoiding unnecessary energy consumption. It balances response speed and energy-saving effect, and improves the intelligence level of the vibration reduction system.

[0077] In one embodiment, such as Figure 12 As shown, the method further includes steps S140-S150.

[0078] S140. If an earthquake early warning message is received, control the heating module to heat at maximum heating power; S150. Determine whether the earthquake early warning information exists. If the earthquake early warning information does not exist, return to step S110, which involves obtaining the current operating frequency of the compressor and the current ambient temperature.

[0079] In practical implementation, to achieve rapid protection and automatic post-earthquake recovery in the event of sudden strong vibrations such as earthquakes, the control method integrates an earthquake emergency response and recovery mechanism. The air conditioning system connects in real time to the earthquake monitoring and early warning center or related public service platform through a built-in network communication module (such as a Wi-Fi module, 4G / 5G module, or wired network interface). When the system receives earthquake early warning information, the controller immediately interrupts the current normal vibration reduction control process and executes emergency response commands: controlling the drive circuit components of the heating module to supply power to the heating wire at maximum output power, causing the heating wire to heat up rapidly. The heat is conducted to the SMA material body through the base, causing its temperature to rise rapidly to near the austenite end temperature (such as 90°C) within seconds, completing the rapid phase transformation from martensite to austenite. At this time, the stiffness of the SMA material body increases sharply, forming a rigid connection with the compressor base, adapter, and mounting body, firmly locking the compressor in the installation position, effectively resisting the violent shaking caused by seismic waves, and protecting the compressor and connecting pipelines.

[0080] During emergency heating, the system continuously monitors the status of earthquake early warning information. Specifically, the controller can periodically (e.g., every 1 second) query the earthquake early warning signals received by the communication module. As long as the early warning information persists, the controller maintains the heating module operating at maximum heating power to ensure that the SMA material remains in a high-stiffness locked state. When the controller detects that the earthquake early warning information has disappeared, it indicates that the earthquake threat has been eliminated. At this point, the controller no longer executes emergency heating but returns to the initial steps of the normal vibration reduction control process. That is, it re-acquires the current operating frequency of the compressor and the current ambient temperature, and redetermines the target heating power based on the acquired data. It then controls the heating module to heat at this target heating power, allowing the SMA material to gradually cool and recover to a phase transformation state adapted to the current operating conditions (such as the martensitic flexible vibration reduction state during normal operation or the austenitic reinforced vibration reduction state during low-frequency / high-frequency operation).

[0081] The method of this embodiment can not only quickly lock the compressor to provide protection when a disaster occurs, but also automatically resume normal operation after the disaster without manual intervention. It realizes a complete closed-loop control from daily vibration reduction to emergency protection and automatic recovery, which significantly improves the intelligence level and reliability of the air conditioner in complex environments.

[0082] In summary, the method of this invention achieves intelligent temperature control of the SMA material body by acquiring the current operating frequency and ambient temperature of the compressor and determining the target heating power accordingly. Under normal operating conditions, it prioritizes the use of compressor waste heat for zero-energy vibration reduction. Under low-frequency or high-frequency conditions, it actively heats the SMA material body to increase stiffness and damping to suppress resonance. During earthquake early warning, it rapidly heats and locks the compressor at maximum power and automatically resumes normal control after the warning disappears. This significantly reduces energy consumption while ensuring vibration reduction performance, and improves the compressor's adaptability and safety under complex operating conditions.

[0083] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A compressor vibration damping device, characterized in that, include: The vibration damping module includes a base and an SMA material body disposed on the base. The base is used to fix it to the mounting body, and the SMA material body is used to form a connection with the base of the compressor. A heat-conducting frame, one end of which is connected to the SMA material body and the other end of which is connected to the housing surface of the compressor, is used to transfer the heat generated by the operation of the compressor to the SMA material body. A heating module, connected to the SMA material body, is used to heat the SMA material body to change its phase transition state.

2. The compressor vibration damping device according to claim 1, characterized in that, The heat-conducting frame includes a heat-collecting ring and a heat-transferring rod. The heat-collecting ring is used to fit onto the housing surface of the compressor. One end of the heat-transferring rod is connected to the heat-collecting ring, and the other end is connected to the SMA material body.

3. The compressor vibration damping device according to claim 2, characterized in that, The vibration damping module is provided in multiple ways. The number of heat transfer rods is the same as the number of vibration damping modules. One end of each heat transfer rod is connected at equal intervals in the circumferential direction of the heat-collecting ring, and the other end of each heat transfer rod is connected to the SMA material body of the corresponding vibration damping module.

4. The compressor vibration damping device according to claim 3, characterized in that, All of the vibration damping modules are arranged at equal intervals in the circumferential direction.

5. The compressor vibration damping device according to any one of claims 1-4, characterized in that, The vibration damping module also includes an elastic material body disposed on top of the SMA material body, and an adapter disposed on the elastic material body, the adapter being used to connect and fix with the base of the compressor.

6. The compressor vibration damping device according to any one of claims 1-4, characterized in that, The heating module includes a drive circuit assembly and a heating wire. The heating wire is uniformly disposed on the base and is in thermal contact with the SMA material. The drive circuit assembly is connected to the heating wire and is used to drive the heating wire to generate heat.

7. The compressor vibration damping device according to any one of claims 1-4, characterized in that, The SMA material body is equipped with a temperature sensor for detecting the temperature of the SMA material body.

8. The compressor vibration damping device according to any one of claims 1-4, characterized in that, The SMA material body is a nickel-titanium alloy.

9. A compressor, characterized in that, The compressor vibration damping device includes any one of claims 1-8, wherein the bottom of the compressor is provided with a base foot, and the base foot is connected to the SMA material body of the compressor vibration damping device.

10. A method for controlling vibration reduction in a compressor, characterized in that, Applied to the compressor of claim 9, the method comprises: Obtain the compressor's current operating frequency and the current ambient temperature; The target heating power is determined based on the current operating frequency and the current ambient temperature. The heating module is controlled to heat at the target heating power.

11. The method according to claim 10, characterized in that, The step of obtaining the target heating power based on the current operating frequency and the current ambient temperature includes: Determine whether the current operating frequency is within a preset frequency range; When the current operating frequency is within the preset frequency range, it is determined whether the current ambient temperature is less than a preset low temperature threshold. If the current ambient temperature is less than the preset low temperature threshold, the target heating power is calculated according to the first preset algorithm; If the current ambient temperature is greater than or equal to the preset low temperature threshold, then the target heating power is set to zero; When the current operating frequency is not within the preset frequency range, the target heating power is calculated according to the second preset algorithm.

12. The method according to claim 11, characterized in that, The step of calculating the target heating power according to the first preset algorithm includes: The target heating power is calculated according to the formula P0=a0×(T1-T)+k0, where P0 is the target heating power, a0 is the power coefficient, T1 is the preset low temperature threshold, T is the current ambient temperature, and k0 is a constant.

13. The method according to claim 11, characterized in that, When the current operating frequency is not within the preset frequency range, the target heating power is calculated according to the second preset algorithm, including: If the current operating frequency is less than the minimum boundary value of the preset frequency range, the target heating power is calculated according to the formula P1=a1×(n1-n)+k1, where P1 is the target heating power, a1 is the power coefficient, n1 is the minimum boundary value, n is the current operating frequency, and k1 is a constant. If the current operating frequency is greater than the maximum boundary value of the preset frequency range, the target heating power is calculated according to the formula P2=a1×(n-n2)+k2, where P2 is the target heating power, a1 is the power coefficient, n2 is the maximum boundary value, n is the current operating frequency, and k2 is a constant.

14. The method according to claim 10, characterized in that, The method further includes: If an earthquake early warning message is received, the heating module is controlled to heat at maximum heating power; Determine whether the earthquake early warning information exists. If the earthquake early warning information does not exist, return to the steps of obtaining the current operating frequency of the compressor and obtaining the current ambient temperature.

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