A vibration and noise reduction type magnetic levitation heat pump

Abstract

The utility model relates to the technical field of magnetic suspension heat pump, concretely relates to a vibration reduction and noise reduction type magnetic suspension heat pump, the magnetic suspension compressor includes the casing, sets up the stator coil in the casing inside, rotates through the bearing and sets up the permanent magnet rotor shaft in the casing inside and is located the stator coil center place, sets up the impeller at the permanent magnet rotor shaft one side end, and sets up the shock absorber disc at the permanent magnet rotor shaft other side end, the connecting place pipe of magnetic suspension compressor and condenser is provided with the spoiler disc that utilizes the outtake pipe to adjust the opening and closing angle, the utility model discloses the mechanical linkage design of shock absorber disc and spoiler disc, will combine the vibration suppression of magnetic suspension compressor and airflow noise control organically, realizes the self -adaptation vibration reduction and noise reduction under the airflow working condition of high and low speed, thereby slows down the casing vibration, dynamic restraint airflow howl.

Description

Technical Field

[0001] This utility model relates to the field of magnetic levitation heat pump technology, specifically to a vibration-damping and noise-reducing magnetic levitation heat pump. Background Technology

[0002] Traditional heat pump technology is widely used in HVAC and industrial heat recovery, but the vibration and noise generated by its mechanical structure during operation has long plagued the industry's development. Conventional heat pump systems rely on compressor units and drive motors supported by mechanical bearings, and the rigid contact between moving parts inevitably leads to frictional losses and impacts.

[0003] As equipment power density increases, structural resonance caused by high-speed rotor rotation becomes particularly prominent. This not only accelerates the wear of bearings and seals, but also transmits low-frequency solid noise to the building structure through the equipment base, causing interference to acoustically sensitive environments such as precision laboratories and medical facilities.

[0004] Existing vibration reduction and noise reduction technologies mostly employ passive isolation strategies, such as installing rubber damping pads or hydraulic shock absorbers at the bottom of the compressor. While these methods can reduce some high-frequency vibration energy, their effectiveness in suppressing airflow whistling is limited. Furthermore, traditional vibration isolation and noise reduction methods often lack sufficient matching with the dynamic response characteristics of the heat pump system, resulting in poor performance under varying operating conditions. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a vibration-damping and noise-reducing magnetic levitation heat pump.

[0006] The technical solution of this utility model is a vibration-damping and noise-reducing magnetic levitation heat pump: it includes a magnetic levitation compressor, an evaporator connected to the magnetic levitation compressor via a pipe, and a condenser connected to the magnetic levitation compressor and the evaporator via a pipe; an expansion valve is also provided at the connection between the evaporator and the condenser;

[0007] The magnetic levitation compressor includes a housing, a stator coil disposed inside the housing, a permanent magnet rotor shaft rotatably disposed inside the housing and located at the center of the stator coil via bearings, an impeller disposed at one end of the permanent magnet rotor shaft, and a shock absorber disk disposed at the other end of the permanent magnet rotor shaft; the shock absorber disk has four radially extending grooves circumferentially disposed, a first air bladder is disposed in the groove away from the center, a spring is sleeved on the outside of the first air bladder, and a counterweight is slidably engaged in the groove near the center; a one-way valve is disposed on the first air bladder, an air outlet pipe is disposed at the center of the shock absorber disk, and the first air bladder is connected to the air pipe inside the shock absorber disk and connected to the air outlet pipe;

[0008] The connection pipe between the magnetic levitation compressor and the condenser is equipped with a baffle plate that allows for adjustment of the opening and closing angle using the outlet pipe.

[0009] Explanation: When the permanent magnet rotor shaft rotates, the centrifugal force generated by the impeller drives the counterweight on the damping disc to move outward along the slide groove, generating an inertial force opposite to the direction of rotor vibration. This dynamically counteracts the unbalanced torque of the rotating components, thereby suppressing the transmission of vibration to the casing and achieving a vibration reduction effect. By using the air outlet pipe to drive the opening and closing angle of the turbulence disc, the airflow is cut, and the periodicity of the vortex is dynamically disrupted, which can significantly reduce the high-frequency whistling and reduce the weighted value of aerodynamic noise by 3-6 dB(A).

[0010] Furthermore, the spoiler disk is provided with a fixed rod and a telescopic rod. The fixed rod and the telescopic rod are rotatable and longitudinally spaced with multiple spoiler plates. The telescopic rod is connected to the inner wall of the spoiler disk through a second airbag. The second airbag is connected to the air outlet pipe through a conduit. The air outlet pipe and the conduit are rotatably and sealingly connected.

[0011] Explanation: Under high-speed conditions, the counterweight significantly compresses the first airbag, driving the spoiler to deflect at a large angle, cutting the concentrated high-speed airflow into dispersed laminar flow and reducing high-frequency eddy noise; at low speeds, the counterweight resets, allowing the spoiler to maintain laminar flow guidance at a micro-angle, reducing the energy of low-frequency pressure pulsation sound waves, while avoiding excessive obstruction of low-speed airflow and energy loss; this mechanical feedback mechanism enables the vibration reduction and noise reduction intensity to adaptively match with the rotational speed, taking into account stability under all operating conditions.

[0012] Furthermore, the spoiler is provided with multiple grooves, and a sound-absorbing layer is embedded inside the grooves.

[0013] Explanation: The sound-absorbing layer utilizes the viscous friction effect generated when airflow passes through to convert sound energy into heat energy, significantly reducing sharp noises such as airflow whistling.

[0014] Furthermore, the surface of the sound-absorbing layer is provided with multiple micropores, and the material of the sound-absorbing layer is ceramic fiber.

[0015] Explanation: The sound-absorbing layer enhances the multiple reflections and absorption of high-frequency sound waves through its surface microporous structure. The high-temperature resistance of ceramic fibers ensures that the sound absorption performance is stable and reliable under high-speed and high-temperature conditions, avoiding the pore collapse problem caused by thermal aging of traditional porous materials.

[0016] Furthermore, the housing has an internal cavity filled with a honeycomb-shaped sound insulation board.

[0017] Explanation: The honeycomb-shaped sound insulation panels filling the shell effectively block and scatter broadband noise caused by internal vibrations through their regular cavity structure. The elastic deformation characteristics of the honeycomb walls further dissipate vibration energy, resulting in dual suppression of both mechanical and aerodynamic noise. The open channel design of the honeycomb structure allows internal heat to be quickly conducted to the outer shell along the walls, avoiding the decrease in heat dissipation efficiency caused by the closed sound insulation layer.

[0018] Furthermore, a shock-absorbing pad is provided on the contact surface between the end of the counterweight and the inside of the slide groove.

[0019] Explanation: The damping pads added to the contact surface between the counterweight end and the slide groove use flexible materials to buffer the sliding impact, reducing the instantaneous impact noise generated by the direct collision between the counterweight and the metal surface of the slide groove. The viscoelastic properties of the pads can absorb high-frequency vibration components during the sliding process, reducing wear on the contact surface while inhibiting the transmission of vibration to the rotor shaft system through the slide groove, thus improving the smoothness and durability of dynamic balance adjustment.

[0020] The beneficial effects of this utility model are as follows: This utility model organically combines vibration suppression and airflow noise control of the magnetic levitation compressor through the mechanical linkage design of the damping disc and the turbulence disc, realizing adaptive vibration reduction and noise reduction under high and low speed conditions; when the permanent magnet rotor shaft rotates at high speed, the centrifugal force generated by the impeller drives the counterweight on the damping disc to move outward along the slide groove, generating an inertial force opposite to the direction of rotor vibration, dynamically offsetting the unbalanced torque of the rotating parts, thereby suppressing the transmission of vibration to the housing; while compressing the spring, the counterweight squeezes the first air bladder, and the gas in the first air bladder is transported to the turbulence disc through the air outlet pipe and the conduit. The two airbags push the telescopic rod to move and cause the baffle to increase its tilt angle, extending the airflow splitting path and dividing the high-speed airflow into multiple laminar flows to weaken high-frequency whistling. Under low-speed conditions, the counterweight returns to its original position, reducing the pressure of the first airbag and decreasing the angle of the baffle, thus avoiding obstruction of low-speed airflow and suppressing low-frequency noise. This solution uses the rotor's own centrifugal force as the driving source and realizes the real-time conversion of vibration energy into noise reduction action through a purely mechanical structure, thereby reducing shell vibration and suppressing airflow whistling. It can dynamically match the vibration reduction and noise reduction requirements at different speeds without the need for additional sensors or electronic control systems. Attached Figure Description

[0021] Figure 1 This is a longitudinal sectional view of Embodiment 1 of this utility model;

[0022] Figure 2 This is a longitudinal sectional view of the magnetic levitation compressor of Embodiment 1 of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the shock absorber disc in Embodiment 1 of this utility model;

[0024] Figure 4 This is a front view structural schematic diagram of the spoiler disk in Embodiment 1 of this utility model;

[0025] Figure 5 This is a partial side view of the spoiler disk in Embodiment 1 of this utility model;

[0026] Among them, 1-magnetic levitation compressor, 11-shell, 12-stator coil, 13-bearing, 14-permanent magnet rotor shaft, 15-impeller, 16-shock absorber, 161-slide groove, 162-first airbag, 163-spring, 164-counterweight, 165-outlet pipe, 2-evaporator, 3-condenser, 4-baffle plate, 41-fixed rod, 42-telescopic rod, 43-baffle plate, 44-second airbag. Detailed Implementation

[0027] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0028] Example 1: As Figure 1 The vibration-damping and noise-reducing magnetic levitation heat pump shown includes a magnetic levitation compressor 1, an evaporator 2 connected to the magnetic levitation compressor 1 via a pipe, and a condenser 3 connected to the magnetic levitation compressor 1 and the evaporator 2 via a pipe; an expansion valve is also provided at the connection between the evaporator 2 and the condenser 3.

[0029] like Figure 2 , 3 As shown, the magnetic levitation compressor 1 includes a housing 11, a stator coil 12 disposed inside the housing 11, a permanent magnet rotor shaft 14 rotatably disposed inside the housing 11 and located at the center of the stator coil 12 via a bearing 13, an impeller 15 disposed at one end of the permanent magnet rotor shaft 14, and a shock absorber 16 disposed at the other end of the permanent magnet rotor shaft 14; the shock absorber 16 has four radially extending grooves 161 circumferentially arranged, a first air bladder 162 disposed in the grooves 161 away from the center, a spring 163 sleeved on the outside of the first air bladder 162, and a counterweight 164 slidably engaged in the grooves 161 near the center; a one-way valve for flow from the outside to the inside is provided on the first air bladder 162, and an air outlet pipe 165 is provided at the center of the shock absorber 16; the first air bladder 162 is connected to the air pipe inside the shock absorber 16 and is connected to the air outlet pipe 165;

[0030] like Figure 4 , 5 As shown, a baffle plate 4 with an adjustable opening angle is installed inside the pipe connecting the magnetic levitation compressor 1 and the condenser 3, using an outlet pipe 165. A fixed rod 41 and a telescopic rod 42 are installed inside the baffle plate 4. Multiple baffles 43 are rotatably arranged between the fixed rod 41 and the telescopic rod 42 and are longitudinally spaced. The telescopic rod 42 is connected to the inner wall of the baffle plate 4 via a second airbag 44. The second airbag 44 is connected to the outlet pipe 165 via a conduit 45. The outlet pipe 165 and the conduit 45 are rotatably and sealingly connected. The angle between the baffles 43 and the airflow direction ranges from 3° to 30°.

[0031] In this embodiment, during the start-up state of the magnetic levitation heat pump, compared with a conventional magnetic levitation heat pump, the vibration reduction RMS range is 20-40%. When both frequencies are below 500Hz, the noise reduction of the magnetic levitation heat pump in this embodiment is 3.7dB compared with a conventional magnetic levitation heat pump; when both frequencies are between 500-2000Hz, the noise reduction of the magnetic levitation heat pump in this embodiment is 5.6dB compared with a conventional magnetic levitation heat pump; when both frequencies are between 2000-5000Hz, the noise reduction of the magnetic levitation heat pump in this embodiment is 9.2dB compared with a conventional magnetic levitation heat pump; and when both frequencies are above 5000Hz, the noise reduction of the magnetic levitation heat pump in this embodiment is 4.1dB compared with a conventional magnetic levitation heat pump.

[0032] It should be noted that this embodiment also includes a power supply and a controller, and the power supply, controller, expansion valve, check valve, evaporator 2, condenser 3, permanent magnet rotor shaft 14, and stator coil 12 are all commercially available products, and will not be described in detail here.

[0033] In this embodiment, the expansion valve, evaporator 2, condenser 3, permanent magnet rotor shaft 14, and stator coil 12 are all electrically connected to the power supply and controller, respectively.

[0034] The working principle of this embodiment is as follows: When the permanent magnet rotor shaft 14 rotates under the action of the stator coil 12, it drives the impeller 15 to rotate, compressing the gaseous refrigerant transported by the evaporator 2. When the impeller 15 rotates at a high speed, the airflow velocity in the pipe connecting the magnetic levitation compressor 1 and the condenser 3 is also very high, thus generating a high-frequency whistling sound from the airflow. At the same time, the centrifugal force of the rotating permanent magnet rotor shaft 14 also affects the air vibration inside the magnetic levitation compressor 1. Through the counterweight 164 of the damping plate 16, under the action of centrifugal force, it generates an opposite force to the impeller, and the position of the counterweight 164 changes. The reverse sliding of the counterweight 164 can alleviate the vibration caused by the centrifugal force. To achieve a damping effect, the counterweight 164 compresses the first airbag 162. The faster the impeller 15 rotates, the larger the compression of the first airbag 162, resulting in greater stretching of the second airbag 44. This pushes the telescopic rod 42 to move more, causing the baffle 43 to tilt at a greater angle, thus better dispersing high-frequency noise and cutting high-speed airflow to reduce high-frequency noise. When the impeller 15 rotates slowly, the gas flow rate is also slow. The counterweight 164 compresses the first airbag 162 less, the second airbag 44 is hardly stretched, and the baffle 43 is hardly tilted, allowing the low-speed airflow to flow in layers, reducing low-frequency noise without hindering the flow speed of the low-speed airflow.

[0035] Example 2: Figure 4As shown, the difference between this embodiment and embodiment 1 is that the turbulence plate 43 is provided with multiple grooves, and a sound-absorbing layer is embedded inside the grooves; the surface of the sound-absorbing layer is provided with multiple micropores, and the material of the sound-absorbing layer is ceramic fiber.

[0036] Example 3: The difference between this example and Example 1 is that the shell 11 has a cavity inside, and the cavity is filled with a honeycomb sound insulation board; the honeycomb sound insulation board is made of aluminum alloy and the honeycomb is filled with ceramic fiber.

[0037] Example 4: The difference between this example and Example 1 is that a shock-absorbing pad is provided on the contact surface between the end of the counterweight 164 and the inside of the slide groove 161.

Claims

1. A vibration-damping and noise-reducing magnetic levitation heat pump, comprising a magnetic levitation compressor (1), an evaporator (2) connected to the magnetic levitation compressor (1) via a pipe, and a condenser (3) connected to the magnetic levitation compressor (1) and the evaporator (2) via a pipe; an expansion valve is further provided at the connection between the evaporator (2) and the condenser (3); characterized in that, The magnetic levitation compressor (1) includes a housing (11), a stator coil (12) disposed inside the housing (11), a permanent magnet rotor shaft (14) rotatably disposed inside the housing (11) and located at the center of the stator coil (12) via a bearing (13), an impeller (15) disposed at one end of the permanent magnet rotor shaft (14), and a shock absorber (16) disposed at the other end of the permanent magnet rotor shaft (14); the shock absorber (16) is provided with four radially extending grooves (161) circumferentially, and a first groove is provided in the groove (161) away from the center. An airbag (162) is provided, with a spring (163) sleeved on the outside of the first airbag (162), and a counterweight (164) is slidably engaged in the groove (161) near the center; a one-way valve is provided on the first airbag (162), and an air outlet pipe (165) is provided at the center of the shock absorber (16). The first airbag (162) is connected to the air pipe inside the shock absorber (16) and connected to the air outlet pipe (165); a baffle plate (4) is provided in the pipe at the connection between the magnetic levitation compressor (1) and the condenser (3) to adjust the opening and closing angle using the air outlet pipe (165).

2. The vibration-damping and noise-reducing magnetic levitation heat pump according to claim 1, characterized in that, The spoiler disk (4) is provided with a fixed rod (41) and a telescopic rod (42). The fixed rod (41) and the telescopic rod (42) are rotatable and longitudinally spaced with multiple spoiler plates (43). The telescopic rod (42) is connected to the inner wall of the spoiler disk (4) through a second airbag (44). The second airbag (44) is connected to the air outlet pipe (165) through a conduit (45). The air outlet pipe (165) and the conduit (45) are rotatably and sealingly connected.

3. A vibration-damping and noise-reducing magnetic levitation heat pump according to claim 2, characterized in that, The bleed plate (43) is provided with multiple grooves, and a sound-absorbing layer is embedded inside the groove.

4. A vibration-damping and noise-reducing magnetic levitation heat pump according to claim 3, characterized in that, The surface of the sound-absorbing layer is provided with multiple micropores, and the material of the sound-absorbing layer is ceramic fiber.

5. A vibration-damping and noise-reducing magnetic levitation heat pump according to claim 1, characterized in that, The housing (11) has an internal cavity, which is filled with a honeycomb-shaped sound insulation board.

6. A vibration-damping and noise-reducing magnetic levitation heat pump according to claim 1, characterized in that, A shock-absorbing pad is provided on the contact surface between the end of the counterweight (164) and the inside of the slide (161).

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