Compressor, vibration reduction method and electrical device thereof

Abstract

The present invention provides a compressor, a vibration reduction method, and an electrical device thereof, relating to the technical field of compressors. The invention addresses the prior art problem of vibrations generated during operation of a compressor, which can easily damage its internal mechanical components. The compressor comprises a compressor body, a liquid separator, and a counterweight structure, wherein the counterweight structure comprises a cavity disposed around the compressor body and / or an area formed within the liquid separator that is disconnected from its refrigerant flow area, and the counterweight structure is connected to a liquid storage and supply device. The present invention is used to improve vibration problems in compressors.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor, a vibration reduction method and an electrical device thereof. Background Art

[0002] A compressor, as a power source, is a machine that boosts low-pressure gas to high-pressure gas and is the heart of an appliance's refrigeration system. During operation, the compressor's vibration behavior varies depending on the speed. When the operating frequency approaches the natural frequency of the structure, the structure will resonate. Increasing or decreasing the operating frequency can reduce the vibration level. Traditional vibration reduction methods involve modifying the structure to raise or lower the natural frequency to a level outside the normal operating frequency range, thereby preventing the operating frequency from approaching the natural frequency and thus resonating. Alternatively, increasing the structural damping converts mechanical energy into heat during resonance, reducing the intensity of the vibration. However, damping components can age and fail over time.

[0003] Some inverter compressors operate in a frequency range from 1Hz to 100Hz. Generally, there's no guarantee that there are no natural frequencies within this range. Another approach is to configure the inverter to block operating frequencies close to the natural frequency to avoid resonance. However, with more natural frequencies, the blocked area increases. This can lead to uneven system speed changes. Under certain operating conditions, the appropriate speed may not be achieved, requiring the compressor to frequently change speeds. This can negatively impact compressor durability, energy consumption, and cooling performance.

[0004] The applicant has discovered that the prior art has at least the following technical problems:

[0005] Currently, there is no variable frequency compressor in the prior art that can significantly change the natural frequency of the structure when changing the rotation speed, which makes the compressor prone to resonance and its internal mechanical parts are easily damaged. Summary of the Invention

[0006] The present invention aims to provide a compressor, a vibration reduction method, and an electrical device thereof to address the prior art technical problem of compressor internal mechanical components being susceptible to damage due to vibration generated during operation. The various technical effects achieved by the preferred technical solution among the various technical solutions provided by the present invention are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] The present invention provides a compressor, comprising a compressor body, a liquid separator and a counterweight structure, wherein the counterweight structure comprises a cavity arranged on the periphery of the compressor body, and / or an area formed in the liquid separator that is not connected to its refrigerant flow area, and the counterweight structure is connected to a liquid storage and supply device.

[0009] Preferably, a partition is provided in the liquid separator, which divides the inner cavity of the liquid separator into a refrigerant flow area and a liquid counterweight area that is not connected to the refrigerant flow area. The refrigerant flow area is connected to the compressor body, and the liquid counterweight area is connected to the liquid storage and supply device through the connecting pipe.

[0010] Preferably, the liquid separator includes a cylinder and an air inlet pipe and an exhaust pipe connected to the cylinder, the partition is arranged in the cylinder, the refrigerant flow area is connected to the compressor body through the exhaust pipe and the refrigerant entering the refrigerant flow area through the air inlet pipe can flow to the compressor body through the exhaust pipe.

[0011] Preferably, the cylinder includes a cylinder body and end covers arranged at both ends of the cylinder body, the air inlet pipe is arranged on the end covers, and the exhaust pipe extends into the cylinder body from the outer peripheral wall of the cylinder body.

[0012] Preferably, the partition is parallel to the axis of the cylinder, and the end covers at both ends of the cylinder and the inner wall of the cylinder are connected to the partition.

[0013] Preferably, the partition is perpendicular to the axis of the cylinder and is connected to the inner wall of the cylinder.

[0014] Preferably, the side of the shell of the shell forming the cavity close to the compressor body is a concave arc surface, the arc surface matches the outer wall surface of the shell and is arranged tightly against the shell, and the cavity is connected to the liquid storage and supply device through a connecting pipe.

[0015] Preferably, the outer shell of the cavity is fan-shaped or crescent-shaped.

[0016] Preferably, the counterweight structure includes a cavity arranged on the periphery of the compressor body or an area formed in the liquid distributor that is not connected to its refrigerant flow area, and the liquid storage and supply device includes a connecting pipe, a liquid storage tank and an air pump, wherein the connecting pipe includes a first branch pipe, a second branch pipe and a branch collecting pipe, and valves are provided on the first branch pipe and the second branch pipe. The first branch pipe and the second branch pipe are both connected to the branch collecting pipe, and the branch collecting pipe is connected to the counterweight structure; the free end of the first branch pipe can extend into the liquid level of the liquid storage tank and the liquid level of the liquid storage tank is connected to the atmosphere, and the second branch pipe is connected to the air pump and the air pump is connected to the atmosphere.

[0017] Preferably, the counterweight structure includes a cavity arranged on the periphery of the compressor body and an area formed in the liquid separator that is not connected to its refrigerant flow area, and the liquid storage and supply device includes a connecting pipe, a liquid storage tank and an air pump, wherein the connecting pipe includes a first branch pipe, a second branch pipe, a cavity connecting pipe and a liquid separator connecting pipe, and the first branch pipe, the second branch pipe, the cavity connecting pipe and the liquid separator connecting pipe are all provided with valves, the cavity connecting pipe is connected to the cavity, and the liquid separator connecting pipe is connected to the area formed in the liquid separator that is not connected to its refrigerant flow area; the cavity connecting pipe is connected in parallel with the liquid separator connecting pipe and is connected to the first branch pipe and the second branch pipe, the free end of the first branch pipe can extend into the liquid level of the liquid storage tank and the liquid level of the liquid storage tank is connected to the atmosphere, the second branch pipe is connected to the air pump and the air pump is connected to the atmosphere.

[0018] Preferably, the liquid separator is a horizontal liquid separator, and the gap between the pipe opening of the communicating pipe in the liquid separator and the bottom of the counterweight structure in the liquid separator is greater than 3 mm and less than 10 mm.

[0019] Preferably, the connecting tube is sealed to the liquid separator.

[0020] Preferably, the liquid in the counterweight structure is an expansive fluid.

[0021] A vibration reduction method based on the above compressor comprises the following steps:

[0022] Step A, determining whether the compressor forms resonance;

[0023] Step B: If yes, the liquid injection amount in the counterweight structure is adjusted by the liquid storage and supply device to change the natural frequency of the structure; if no resonance is formed, the compressor continues to operate normally.

[0024] An electrical device comprises the compressor.

[0025] Preferably, the electrical device is an air conditioner.

[0026] The compressor provided by the present invention includes a compressor body, a liquid separator, and a counterweight structure. The counterweight structure includes a cavity disposed outside the compressor body and / or an area formed within the liquid separator that is disconnected from its refrigerant flow area. The counterweight structure is connected to a liquid storage and supply device. When the compressor resonates, the liquid storage and supply device adjusts the amount of liquid injected into the counterweight structure to change the compressor's natural frequency, thereby shifting the compressor's natural frequency away from its operating frequency and avoiding resonance. This solves the technical problem in the prior art of vibrations generated during compressor operation that can easily damage internal mechanical components. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 is a schematic structural diagram of a compressor provided in Example 1 of the present invention;

[0029] Figure 2 is a cross-sectional view of the liquid dispenser provided in Example 1 of the present invention;

[0030] Figure 3 yes Figure 2 Enlarged view of part A;

[0031] Figure 4 is a cross-sectional view of a liquid dispenser provided in Example 2 of the present invention;

[0032] Figure 5 is a schematic structural diagram of a compressor provided by Example 3 of the present invention;

[0033] Figure 6 This is a structural principle diagram of a liquid storage and supply device in an embodiment of the present invention;

[0034] Figure 7 is a schematic structural diagram of a compressor provided by Example 4 of the present invention;

[0035] Figure 8 is a schematic structural diagram of a compressor provided in Example 5 of the present invention;

[0036] Figure 9 is another structural principle diagram of the liquid storage and supply device in an embodiment of the present invention;

[0037] Figure 10 This is a flow chart of a compressor vibration reduction method provided by an embodiment of the present invention.

[0038] Figure numerals: 1. Compressor body; 2. Liquid distributor; 21. Cylinder; 211. Cylinder body; 212. End cover; 22. Inlet pipe; 23. Exhaust pipe; 3. Counterweight; 4. Partition; 5. Refrigerant flow area; 6. Liquid counterweight area; 7. Liquid storage and supply device; 71. Liquid storage tank; 72. Air pump; 8. Connecting pipe; 81. First branch pipe; 82. Second branch pipe; 83. Branch collecting pipe; 84. Cavity connecting pipe; 85. Liquid distributor connecting pipe; 9. First valve; 10. Second valve; 11. Third valve; 12. Fourth valve. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0040] See also Figures 1 to 9 The present invention provides a compressor, comprising a compressor body, a liquid separator and a counterweight structure, wherein the counterweight structure comprises a cavity arranged on the periphery of the compressor body, and / or an area formed in the liquid separator that is not connected to its refrigerant flow area, and the counterweight structure is connected to a liquid storage and supply device.

[0041] When the compressor forms resonance, the amount of liquid injected into the counterweight structure is adjusted by the liquid storage and supply device 7 to change the mass distribution of the compressor, thereby realizing a dynamic change in the natural frequency of the structure (compressor). To increase the speed of the compressor, liquid is injected into the counterweight structure through the liquid storage and supply device 7 to increase the structural counterweight, thereby reducing the natural frequency and avoiding resonance; on the contrary, to reduce the speed of the compressor, liquid is extracted from the counterweight structure through the liquid storage and supply device 7 to reduce the structural counterweight, thereby increasing the natural frequency and avoiding resonance, thereby making the natural frequency of the compressor far away from the operating frequency of the compressor and avoiding resonance, thereby solving the technical problem in the prior art that when the compressor is running, vibration is generated, which can easily damage its internal mechanical parts. At the same time, the vibration of the compressor will drive the movement of the liquid inside the counterweight structure, thereby consuming part of the vibration energy, which also has the effect of reducing vibration. It should be noted that under any working conditions, the counterweight structure is in a state of gas and liquid coexistence.

[0042] Example 1:

[0043] The compressor provided by the present invention includes a compressor body 1, a liquid separator 2, and a counterweight structure. The counterweight structure is an area formed in the liquid separator that is not connected to the refrigerant flow area. The counterweight structure is connected to the liquid storage and supply device. Specifically, the liquid separator 2 includes a cylinder 21 and an air inlet pipe 22 and an exhaust pipe 23 connected to the interior of the cylinder 21. A partition 4 is provided in the cylinder 21. Figure 2 , partition 4 is perpendicular to the axis of cylinder 21. Partition 4 divides the inner cavity of liquid separator 2 into a non-connected refrigerant flow area 5 and a liquid counterweight area 6. Refrigerant flow area 5 functions as a conventional liquid separator 2, storing liquid refrigerant and filtering solid particles. After stable operation, the amount of liquid refrigerant in refrigerant flow area 5 will be significantly reduced. Liquid counterweight area 6 is used to store liquid and gas. The natural frequency of liquid separator 2 can be adjusted by varying the amount of liquid injected into liquid counterweight area 6.

[0044] See also Figure 1 and Figure 2 The liquid separator 2 is a horizontal liquid separator, and the axis of the cylinder 21 is arranged parallel to the horizontal plane, wherein the cylinder 21 includes a cylinder body 211 and end covers 212 arranged at both ends of the cylinder body 211, the air inlet pipe 22 is arranged on one of the end covers 212, and the exhaust pipe 23 extends into the cylinder body 211 from the bottom of the outer peripheral wall of the cylinder body 211, the partition 4 is connected to the inner wall of the cylinder body 211, the refrigerant flow area 5 is connected to the compressor body 1 through the exhaust pipe 23, and the refrigerant entering the refrigerant flow area 5 through the air inlet pipe 22 can flow to the inside of the compressor body 1 through the exhaust pipe 23, and the liquid counterweight area 6 is connected to the liquid storage and supply device 7 through the connecting pipe 8.

[0045] As an optional implementation method of the embodiment of the present invention, Figure 3 As shown, the gap between the pipe opening of the connecting pipe 8 located in the liquid weight area 6 and the bottom of the liquid weight area 6 is d, and d should be greater than 3 mm and less than 10 mm.

[0046] Compared to the refrigerant flow area 5, the pressure in the liquid counterweight area 6 is not high, and the connecting pipe 8 can be made of an ordinary plastic hose to meet the material requirements. The liquid distributor 2 normally operates at a low temperature, and the connecting pipe 8 and the cylinder 21 can be sealed by gluing to ensure the sealing within the liquid counterweight area 6. In addition, this sealing method is more convenient and low-cost.

[0047] The liquid in the liquid counterweight region 6 can be a shear-thickening dilatant fluid. When the liquid is subjected to high-frequency shear vibration, the viscosity of the liquid increases, and the vibration energy can be transferred to the interior of the liquid. In other words, the stronger the effect of the liquid on the structure of the liquid dispenser 2.

[0048] In addition, there are many ways to design the liquid storage and supply device 7, one of which is shown in FIG. Figure 6 The liquid storage and supply device includes a connecting pipe, a liquid storage tank and an air pump, and its connecting pipe 8 includes a first branch pipe 81, a second branch pipe 82 and a branch collecting pipe 83. The first branch pipe 81 and the second branch pipe 82 are both connected to the branch collecting pipe 83, and the branch collecting pipe 83 is connected to the liquid balancing area 6. The gap between the pipe mouth of the branch collecting pipe 83 located in the liquid balancing area 6 and the bottom of the liquid balancing area 6 is d; a first valve 9 is provided on the first branch pipe 81, and a second valve 10 is provided on the second branch pipe 82.

[0049] After entering the liquid storage and supply device 7, the branch manifold 83 splits into two branches (a first branch 81 and a second branch 82), controlled by a first valve 9 and a second valve 10, respectively. The free end of the first branch 81 extends into the liquid level of the liquid storage tank 71, where the liquid level is connected to the atmosphere. The second branch 82 is connected to the air pump 72, which is connected to the atmosphere and can inflate and deflat the connecting pipe 8.

[0050] If it is necessary to extract liquid from the liquid balancing area 6, the liquid level in the liquid balancing area 6 is relatively high at this time, close the first valve 9, open the second valve 10, and the air pump 72 inflates the liquid balancing area 6; after a certain volume of gas is in the liquid balancing area 6, its pressure increases; then close the second valve 10, open the first valve 9, and the gas inside the liquid balancing area 6 can squeeze the liquid into the liquid storage tank 71.

[0051] If the liquid balancing area 6 needs to be filled with liquid, the liquid level may have submerged the pipe mouth of the connecting pipe 8 in the liquid balancing area 6. The liquid should be pumped out first to lower the liquid level in the liquid balancing area 6 to below the pipe mouth of the connecting pipe 8 in the liquid balancing area 6; then close the first valve 9, open the second valve 10, and the air pump 72 pumps air into the liquid balancing area 6 to reduce its pressure; then close the second valve 10, open the first valve 9, and the external air pressure squeezes the liquid in the liquid storage tank 71 into the liquid balancing area 6.

[0052] Example 2:

[0053] The difference between this embodiment 2 and embodiment 1 is that the partition 4 arranged in the cylinder 21 of the liquid distributor 2 is parallel to the axis of the cylinder 21, the partition 4 is connected to the end covers 212 at both ends of the cylinder 211, and the partition 4 is also connected to the inner wall of the cylinder 211.

[0054] See also Figure 4 When the liquid separator 2 is horizontal, that is, the axis of the cylinder 21 is arranged parallel to the horizontal plane, the interior of the liquid separator 2 is divided into two upper and lower chambers by the partition 4. The upper chamber is the refrigerant flow area 5, and the lower chamber is the liquid counterweight area 6. The air inlet pipe 22 and the exhaust pipe 23 of the liquid separator 2 are both connected to the refrigerant flow area 5. The lower chamber is connected to the liquid storage and supply device. The structure of the liquid storage and supply device 7 in this embodiment is the same as that of the liquid storage and supply device 7 in Example 1. See Figure 6 After the liquid counterweight area 6 is filled, the mass of the liquid is evenly distributed inside the cylinder 21 of the liquid distributor 2, making the force more balanced. Regarding how to adjust the liquid in the liquid counterweight area 6 (pumping or filling), please refer to the description in Example 1 and will not be repeated here.

[0055] Example 3:

[0056] The difference between the present embodiment 3 and the embodiment 1 is that the compressor provided in the present embodiment includes a compressor body 1, a liquid distributor 2 and a counterweight structure. Considering that the rotational vibration of the compressor body 1 itself is relatively obvious, a cavity for counterweight is provided on the periphery of the compressor body 1 (for the convenience of description, the "cavity for counterweight" is referred to as the "counterweight portion"). Figure 5 The outer shell of the counterweight 3 has a concave arc surface on the side close to the housing of the compressor body 1. Preferably, the counterweight 3 is in a fan-shaped or crescent-shaped shape. The arc surface matches the outer wall of the housing of the compressor body 1 and is tightly attached to the housing of the compressor body 1. The counterweight 3 can be fixed to the housing of the compressor body 1 by welding.

[0057] The counterweight 3 is connected to a liquid storage and supply device 7. The liquid in the counterweight 3 can use a shear-thickening dilatant fluid to increase the mass involved in the vibration, and adjust the natural frequency of the compressor vibration when the compressor resonates. There are many ways to design the liquid storage and supply device 7, one of which is shown in FIG. Figure 6 , the branch collecting pipe 83 is connected to the counterweight part 3.

[0058] If it is necessary to extract liquid from the counterweight part 3, the liquid level in the counterweight part 3 is relatively high at this time, close the first valve 9, open the second valve 10, and inflate the counterweight part 3 with air using the air pump 72; after a certain volume of gas is formed in the counterweight part 3, its pressure increases; then close the second valve 10, open the first valve 9, and the gas inside the counterweight part 3 can squeeze the liquid into the liquid storage tank 71.

[0059] If the counterweight part 3 needs to be injected with liquid, the liquid level may have submerged the pipe opening of the connecting tube 8 in the counterweight part 3. The liquid should be pumped out first to lower the liquid level in the counterweight part 3 to below the pipe opening of the connecting tube 8 in the counterweight part 3; then close the first valve 9, open the second valve 10, and use the air pump 72 to pump air into the counterweight part 3 to lower its pressure; then close the second valve 10, open the first valve 9, and the external air pressure will squeeze the liquid in the liquid storage tank 71 into the counterweight part 3.

[0060] Example 4:

[0061] This embodiment provides a compressor, including a compressor body 1, a liquid separator 2 and a counterweight structure. The counterweight structure includes a cavity arranged on the periphery of the compressor body and an area formed in the liquid separator that is not connected to its refrigerant flow area. The counterweight structure is connected to the liquid storage and supply device.

[0062] The compressor body 1 is provided with a cavity capable of holding liquid, that is, a counterweight portion 3 is provided on the periphery of the compressor body 1, and a partition 4 is provided in the liquid separator 2. The partition 4 can separate the inner cavity of the liquid separator 2 into a refrigerant flow area 5 and a liquid counterweight area 6 that are not connected to each other. The refrigerant flow area 5 is connected to the compressor body 1. Figure 7As shown, the counterweight portion 3 and the liquid counterweight region 6 can each be connected to a liquid storage and supply device. In this case, the structure of the liquid storage and supply device is as follows: Figure 6 As shown, when in use, the amount of liquid injected into the counterweight portion 3 can be adjusted first, and then the amount of liquid injected into the liquid counterweight area 6 can be adjusted; or the amount of liquid injected into the liquid counterweight area 6 can be adjusted first, and then the amount of liquid injected into the counterweight portion 3 can be adjusted. The specific adjustment method has been described in Example 1 and Example 3 and will not be mentioned again here.

[0063] Example 5:

[0064] The difference between this embodiment 5 and embodiment 4 is that the compressor provided in this embodiment is as follows: Figure 8 As shown, the counterweight portion 3 and the liquid counterweight area 6 are connected to the same liquid storage and supply device. In this case, the structure of the liquid storage and supply device is as follows: Figure 9 As shown, the connecting pipe 8 includes a first branch pipe 81, a second branch pipe 82, a cavity connecting pipe 84 and a liquid separator connecting pipe 85. The first branch pipe 81 is connected to the first valve 9, the second branch pipe 82 is connected to the second valve 10, the cavity connecting pipe 84 is connected to the third valve 11, and the liquid separator connecting pipe 85 is connected to the fourth valve 12. Specifically, the cavity connecting pipe 84 is connected to the cavity, and the liquid separator connecting pipe 85 is connected to an area formed in the liquid separator 2 that is not connected to its refrigerant flow area; the cavity connecting pipe 84 and the liquid separator connecting pipe 85 are connected in parallel to the first branch pipe 81 and the second branch pipe 82, the free end of the first branch pipe 81 can extend to the liquid level of the liquid storage tank 71 and the liquid level of the liquid storage tank 71 is connected to the atmosphere, and the second branch pipe 82 is connected to the air pump 72 and the air pump 72 is connected to the atmosphere.

[0065] During use, the amount of liquid injected into the counterweight portion 3 can be adjusted first, and then the amount of liquid injected into the liquid counterweight region 6 can be adjusted; or the amount of liquid injected into the liquid counterweight region 6 can be adjusted first, and then the amount of liquid injected into the counterweight portion 3 can be adjusted. The specific adjustment method is as follows:

[0066] If the amount of liquid injected into the counterweight 3 is to be adjusted first, the fourth valve 12 is closed and the third valve 11 is opened. When the counterweight 3 needs to be pumped out, the liquid level in the counterweight 3 is relatively high. The first valve 9 is closed and the second valve 10 is opened, and the air pump 72 inflates the counterweight 3. After a certain volume of gas is accumulated in the counterweight 3, its pressure increases. The second valve 10 is then closed and the first valve 9 is opened, and the gas inside the counterweight 3 can squeeze the liquid into the liquid storage tank 71. If the counterweight 3 needs to be filled with liquid, the liquid level may have already submerged the nozzle of the cavity connecting pipe 84 in the counterweight 3. The liquid should be pumped out first, and the liquid level in the counterweight 3 should be lowered to below the nozzle of the cavity connecting pipe 84 in the counterweight 3. The first valve 9 is then closed and the second valve 10 is opened, and the air pump 72 pumps out the counterweight 3 to reduce its pressure. The second valve 10 is then closed and the first valve 9 is opened, and the external air pressure squeezes the liquid in the liquid storage tank 71 into the counterweight 3.

[0067] After adjusting the amount of liquid injected into the counterweight part 3, adjust the amount of liquid injected into the liquid counterweight area 6, close the third valve 11, and open the fourth valve 12. When it is necessary to extract liquid from the liquid counterweight area 6, the liquid level in the liquid counterweight area 6 is higher at this time, close the first valve 9, open the second valve 10, and use the air pump 72 to inflate the liquid counterweight area 6; after there is a certain volume of gas in the liquid counterweight area 6, its pressure increases; then close the second valve 10, open the first valve 9, and the gas inside the liquid counterweight area 6 can squeeze the liquid into the liquid storage tank 71. If the liquid weighting area 6 needs to be filled, the liquid level may have submerged the pipe mouth of the liquid separator connecting pipe 85 in the liquid weighting area 6. The liquid should be pumped out first to lower the liquid level in the liquid weighting area 6 to below the pipe mouth of the liquid separator connecting pipe 85 in the liquid weighting area 6; then close the first valve 9, open the second valve 10, and the air pump 72 pumps air into the liquid weighting area 6 to reduce its pressure; then close the second valve 10, open the first valve 9, and the external air pressure squeezes the liquid in the liquid storage tank 71 into the liquid weighting area 6.

[0068] If you want to adjust the liquid injection amount in the liquid counterweight area 6 first, close the third valve 11, open the fourth valve 12, and then refer to the above description of the method of extracting or injecting liquid into the liquid counterweight area 6 to adjust the liquid injection amount in the liquid counterweight area 6; after adjusting the liquid injection amount in the liquid counterweight area 6, adjust the liquid injection amount in the counterweight part 3, close the fourth valve 12, open the third valve 11, and then refer to the above description of the method of extracting or injecting liquid into the counterweight part 3 to adjust the liquid injection amount in the counterweight part 3.

[0069] Example 6:

[0070] See also Figure 10 This embodiment provides a vibration reduction method for the compressor in the above embodiment, comprising the following steps:

[0071] Step A, determining whether the compressor forms resonance;

[0072] Step B: If yes, the liquid injection amount of the counterweight structure (the counterweight portion 3 and / or the liquid counterweight area 6) is adjusted through the liquid storage and supply device 7 to change the natural frequency of the compressor; if no resonance is formed, the compressor continues to operate normally.

[0073] Specifically, the adjustment method can refer to the following formula:

[0074]

[0075] Where Wn is the natural frequency, k is the effective stiffness, and m is the effective mass.

[0076] The volume occupied by gas in the counterweight portion 3 and the liquid counterweight area 6 shall not be less than 10%, and the volume occupied by liquid shall not be less than 10%. Taking the structure of the liquid separator as an example, when the volume of liquid in the liquid counterweight area 6 reaches 90%, the total mass of the liquid is recorded as m1. The mass of the cylinder 21 of the liquid separator 2 is recorded as m2, and m1 and m2 should satisfy: m1>0.5*m2. If the natural frequency measured when the minimum liquid is stored in the liquid counterweight area 6 is 60Hz, the natural frequency can be approximately calculated using the formula to drop to below 50Hz when the maximum liquid is stored in the liquid counterweight area 6. The natural frequency of the compressor is adjusted according to the operating frequency of the compressor. When the compressor body 1 needs to run at 60Hz, liquid is injected into the liquid counterweight area 6 to increase the counterweight, so that the natural frequency is adjusted to 50Hz to avoid resonance; when the compressor body 1 needs to run at 50Hz, the liquid in the liquid counterweight area 6 is extracted to increase the natural frequency of the liquid separator 2 to avoid resonance.

[0077] Example 7:

[0078] This embodiment provides an electrical device, including the compressor described in Embodiment 1, 2, 3, 4, or 5. The electrical device is an air conditioner, and the air conditioner provided by this embodiment can operate normally across the entire frequency range and avoid resonance.

[0079] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A compressor, characterized in that: It comprises a compressor body (1), a liquid distributor (2) and a counterweight structure, wherein: The counterweight structure includes a cavity provided on the periphery of the compressor body (1) and an area formed in the liquid distributor (2) that is not connected to the refrigerant flow area thereof, and the counterweight structure is connected to the liquid storage and supply device; When the compressor resonates, the liquid storage and supply device adjusts the amount of liquid injected into the counterweight structure to change the mass distribution of the compressor, thereby changing the natural frequency of the compressor; A partition (4) is provided in the liquid separator, and the partition (4) divides the inner cavity of the liquid separator (2) into a refrigerant flow area (5) and a liquid counterweight area (6) that is not connected to the refrigerant flow area. The refrigerant flow area (5) is connected to the compressor body (1), and the liquid counterweight area (6) is connected to the liquid storage and supply device (7) through a connecting pipe. The liquid distributor (2) includes a cylinder (21) and an air inlet pipe (22) and an air outlet pipe (23) connected to the cylinder (21); the partition (4) is provided in the cylinder (21); the refrigerant flow area (5) is connected to the compressor body (1) through the air outlet pipe (23); and the refrigerant entering the refrigerant flow area (5) through the air inlet pipe (22) can flow to the compressor body (1) through the air outlet pipe (23).

2. The compressor according to claim 1, characterized in that The cylinder (21) comprises a cylinder body (211) and end covers (212) arranged at both ends of the cylinder body (211); the air inlet pipe (22) is arranged on the end covers (212); and the exhaust pipe (23) extends from the outer peripheral wall of the cylinder body (211) into the cylinder body (211).

3. The compressor according to claim 2, characterized in that The partition (4) is parallel to the axis of the cylinder (21), and the end covers (212) at both ends of the cylinder (211) and the inner wall of the cylinder (211) are connected to the partition (4).

4. The compressor according to claim 2, characterized in that The partition (4) is perpendicular to the axis of the cylinder (21) and the partition (4) is connected to the inner wall of the cylinder (211).

5. The compressor according to claim 1, characterized in that The side of the shell of the shell forming the cavity close to the compressor body (1) is a concave arc surface, the arc surface matches the outer wall surface of the shell and is arranged closely to the shell, and the cavity is connected to the liquid storage and supply device through a connecting pipe.

6. The compressor according to claim 5, characterized in that The outer shell of the cavity is in a fan-shaped or crescent-shaped form.

7. The compressor according to claim 1, characterized in that The liquid storage and supply device comprises a connecting pipe, a liquid storage tank (71) and an air pump (72), wherein: The connecting pipe (8) includes a first branch pipe (81), a second branch pipe (82) and a branch collecting pipe (83), wherein the first branch pipe (81) and the second branch pipe (82) are both provided with valves, and the first branch pipe (81) and the second branch pipe (82) are both connected to the branch collecting pipe (83), and the branch collecting pipe (83) is connected to the counterweight structure; the free end of the first branch pipe (81) can extend into the liquid surface of the liquid storage tank (71), and the liquid surface of the liquid storage tank (71) is connected to the atmosphere, and the second branch pipe (82) is connected to the air pump (72), and the air pump (72) is connected to the atmosphere.

8. The compressor according to claim 1, characterized in that The liquid storage and supply device comprises a connecting pipe, a liquid storage tank (71) and an air pump (72), wherein: The connecting pipe (8) includes a first branch pipe (81), a second branch pipe (82), a cavity connecting pipe (84) and a liquid distributor connecting pipe (85), wherein the first branch pipe (81), the second branch pipe (82), the cavity connecting pipe (84) and the liquid distributor connecting pipe (85) are all provided with valves, the cavity connecting pipe (84) is connected to the cavity, and the liquid distributor connecting pipe (85) is connected to an area formed in the liquid distributor (2) that is not connected to its refrigerant flow area; the cavity connecting pipe (84) and the liquid distributor connecting pipe (85) are connected in parallel to the first branch pipe (81) and the second branch pipe (82), the free end of the first branch pipe (81) can extend to the liquid surface of the liquid storage tank (71) and the liquid surface of the liquid storage tank (71) is connected to the atmosphere, and the second branch pipe (82) is connected to the air pump (72) and the air pump (72) is connected to the atmosphere.

9. The compressor according to claim 7 or 8, characterized in that The liquid separator (2) is a horizontal liquid separator (2), and the gap between the pipe opening of the connecting pipe (8) in the liquid separator (2) and the bottom of the counterweight structure in the liquid separator (2) is greater than 3 mm and less than 10 mm.

10. The compressor according to claim 7 or 8, characterized in that The connecting pipe (8) is sealedly connected to the liquid distributor (2).

11. The compressor according to claim 1, wherein The liquid in the counterweight structure is an expansive fluid.

12. A vibration reduction method for a compressor according to any one of claims 1 to 11, characterized in that: The following steps are involved: Step A, determining whether the compressor forms resonance; Step B: If yes, the liquid injection amount in the counterweight structure is adjusted by the liquid storage and supply device (7) to change the natural frequency of the structure; if no resonance is formed, the compressor continues to operate normally.

13. An electrical device, characterized in that: It comprises a compressor, wherein the compressor is the compressor according to any one of claims 1 to 11.

14. The electrical device according to claim 13, characterized in that: The electrical device is an air conditioner.

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