A rotary compressor and air conditioner

Abstract

The application discloses a kind of rotor compressor and air conditioner, stator subassembly adopts partition design structure, including upper stator coil and lower stator coil, so that the clearance between stator and rotor can be detected in partition, in detection, first driving current is applied to upper stator coil and / or lower stator coil, upper stator coil and / or lower stator coil are driven under the driving of first driving current respectively to generate magnetic electric power rotation torque to rotor subassembly, so that rotor subassembly is cut by magnetic line of force in rotating magnetic field to generate current, to generate rotation, whether the clearance between upper stator and / or lower stator and rotor is located in set range is judged according to the relationship between lower stator clearance and driving speed under same driving current, so that the abnormality of the clearance between stator and rotor can be detected after the welding of compressor shell, the problem that existing compressor cannot detect the clearance between stator and rotor by clearance gauge after sealing shell is solved, and the pass rate of compressor leaving factory is improved.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more particularly to a rotary compressor and an air conditioner. Background Technology

[0002] The main power component of an air conditioner's outdoor unit is the compressor, and rotary compressors are widely used in air conditioners. Structurally, they are more reliable because they do not require a suction valve, and for the same reason, they are suitable for variable-speed operation.

[0003] For rotary compressors, the stator and rotor pump assembly are the basic components. During compressor operation, the stator remains stationary, while the rotor pump rotates relative to the stator, performing periodic work. The advantages of rotary compressors are fewer parts, compact size, and light weight. However, their limitation lies in the fact that if the gap between the compressor stator and rotor exceeds the set range, it will have a significant adverse effect on its performance. If the gap exceeds the set range due to assembly issues or changes in the gap due to wear of parts during use, the machine's performance will deteriorate rapidly.

[0004] For example, during the development process, the applicant discovered that differences in the structural dimensions of the stator-rotor assembly gap can cause vibration noise in the compressor unit. By identifying and confirming the noise source, it can be found that the main cause of the noise is that the gap between the compressor stator and rotor does not meet the requirements, resulting in different driving torques of the stator coil at different contact positions with the rotor, which leads to uneven force on the rotor, and consequently causes the compressor unit to exceed the fourth harmonic frequency limit, resulting in vibration noise.

[0005] To prevent abnormal stator-rotor clearance due to improper assembly before leaving the factory, manufacturers need to inspect the stator-rotor clearance during the manufacturing process. The existing inspection method is to use a clearance gauge to inspect the stator-rotor clearance before the compressor casing is sealed. However, this inspection method still has hidden dangers. There is a problem that the stator-rotor clearance may become abnormal during the subsequent casing welding process. At this time, because the casing has already been welded, the clearance gauge cannot detect the internal stator-rotor clearance. Summary of the Invention

[0006] The purpose of this invention is to propose a rotary compressor that adopts a stator coil partition design, dividing the stator-rotor gap into two parts. This allows for partitioned detection of the stator-rotor gap. During detection, the relationship between the stator-rotor gap and the drive speed under the same drive current is used to determine whether the gap between the upper stator and / or the lower stator and the rotor is within a set range. This enables the detection of stator-rotor gap anomalies even after the compressor casing has been welded, solving the problem that existing compressors cannot use gap gauges to detect the stator-rotor gap after the casing is sealed, thus improving the compressor's factory pass rate.

[0007] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0008] A rotary compressor is proposed, comprising:

[0009] A stator assembly and a rotor assembly, wherein the rotor assembly is assembled inside the stator assembly;

[0010] The stator assembly includes:

[0011] The gap between the upper stator coil and the rotor assembly forms a first gap;

[0012] The gap between the lower stator coil and the rotor assembly forms a second gap; and it is integrated with the upper stator assembly by clamps.

[0013] The rotary compressor also includes:

[0014] The stator-rotor gap detection module runs a stator-rotor gap detection method, the detection method including:

[0015] Apply a first drive current to the upper stator coil and record the first rotational speed of the rotor assembly; and / or,

[0016] A second drive current is applied to the lower stator coil, and the second rotational speed of the rotor assembly is recorded.

[0017] Determine whether the compressor's stator-rotor clearance is within the set range based on the first speed and / or the second speed.

[0018] An air conditioner is proposed that uses a rotary compressor, the rotary compressor comprising:

[0019] A stator assembly and a rotor assembly, wherein the rotor assembly is assembled inside the stator assembly; the stator assembly includes: an upper stator coil, the gap between which forms a first gap with the rotor assembly; a lower stator coil, the gap between which forms a second gap with the rotor assembly; and is integrally positioned with the upper stator assembly by clamps;

[0020] The air conditioner also includes:

[0021] The stator-rotor gap detection module runs a stator-rotor gap detection method, the detection method including:

[0022] Apply a first drive current to the upper stator coil and record the first rotational speed of the rotor assembly; and / or,

[0023] A second drive current is applied to the lower stator coil, and the second rotational speed of the rotor assembly is recorded.

[0024] Determine whether the compressor's stator-rotor clearance is within the set range based on the first speed and / or the second speed.

[0025] Compared with the prior art, the advantages and positive effects of the present invention are as follows: In the rotor compressor and air conditioner proposed in this invention, the stator assembly adopts a partitioned design structure, including an upper stator coil and a lower stator coil. The two are positioned as a whole by clamps and assembled around the rotor assembly, thereby enabling partitioned detection of the stator-rotor gap, achieving accurate detection and location of gap abnormalities. During detection, a first driving current is applied to the upper stator coil and / or the lower stator coil. Under the drive of the first driving current, the upper stator coil and / or the lower stator coil respectively generate magnetoelectric rotational torque on the rotor assembly, causing the rotor assembly to be cut by magnetic lines of force in the rotating magnetic field and generate current, thereby rotating at a first speed or a second speed. If the upper stator coil... When the first gap between the upper stator and the rotor and / or the second gap between the lower stator coil and the rotor assembly exceed the set range, the driving torque applied to the rotor assembly under the action of the first driving current will cause the rotor assembly to rotate abnormally, thereby causing the compressor to generate vibration noise. Based on this, the present invention determines whether the gap between the upper stator and / or the lower stator and the rotor is within the set range by combining the relationship between the stator and rotor gap and the driving speed under the same driving current, combined with the first speed and / or the second speed. This enables the detection of abnormal stator and rotor gaps even after the compressor casing is welded, solving the problem that existing compressors cannot use gap gauges to detect the stator and rotor gaps after the casing is sealed, and improving the factory pass rate of the compressor.

[0026] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a cross-sectional view of the rotary compressor proposed in this invention;

[0029] Figure 2 This is a side view of the stator assembly of the rotary compressor proposed in this invention.

[0030] Figure 3 For the present invention Figure 2 A sectional view of the stator assembly shown along line AA;

[0031] Figure 4 This is a schematic diagram of the stator assembly structure of the rotary compressor proposed in this invention;

[0032] Figure 5 This is a schematic diagram of the assembly structure of the stator assembly and rotor assembly of the rotary compressor proposed in this invention;

[0033] Figure 6 For the present invention Figure 5 The given sectional view of the stator assembly and rotor assembly along line AA;

[0034] Figure 7 This is a schematic diagram of the functional architecture of the rotary compressor proposed in this invention;

[0035] Figure 8 This is a schematic diagram illustrating the steps for implementing gap detection in the rotary compressor proposed in this invention;

[0036] Figure 9 The following are schematic diagrams illustrating the steps for implementing clearance detection in a rotary compressor in some embodiments of the present invention;

[0037] Figure 10 This invention provides schematic diagrams of the steps for implementing clearance detection in a rotary compressor in some embodiments;

[0038] Figure 11 This invention provides schematic diagrams of the steps for implementing clearance detection in a rotary compressor in some embodiments;

[0039] Figure 12 This is a schematic diagram of the functional architecture of the rotary compressor proposed in this invention;

[0040] Figure 13 A schematic diagram of the driving steps implemented by the rotary compressor proposed in this invention when detecting abnormal stator-rotor clearance;

[0041] Figure 14 This is a schematic diagram of the rotary compressor driving steps given in some embodiments of the present invention;

[0042] Figure 15 This is a schematic diagram of the rotary compressor driving steps given in some embodiments of the present invention;

[0043] Figure 16 This is a schematic diagram of the driving steps of a rotary compressor as given in some embodiments of the present invention. Detailed Implementation

[0044] 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 some embodiments of the present invention, and not all 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 this application.

[0045] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0050] The rotary compressor proposed in this invention is used as a compressor in air conditioners. Air conditioners execute a refrigeration cycle by using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

[0051] Low-temperature, low-pressure refrigerant enters the compressor, which compresses it into a high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0052] The stator and rotor assembly of the rotary compressor in this embodiment of the invention is as follows: Figures 1 to 6 As shown, it includes an outer casing 1, a stator assembly 2, a rotor assembly 3, and a rotor pump 4.

[0053] The manufacturing and installation sequence of this rotary compressor is as follows:

[0054] 1. Rotor assembly 3 and rotor pump 4 are first heat-welded together to form rotor pump assembly.

[0055] 2. Place the welded rotor pump assembly into the stator assembly 2 to form a stator-rotor assembly.

[0056] 3. Finally, heat-weld the outer casing 1 to the installed stator and rotor assembly together.

[0057] The stator assembly 2 includes an upper stator coil 21 and a lower stator coil 22, which are positioned together by clamps 23 to form an integral stator.

[0058] In this embodiment of the invention, a stator coil partition design is adopted, dividing the stator-rotor gap into two parts: the gap between the upper stator coil 21 and the rotor assembly 3, and the gap between the lower stator coil 22 and the rotor assembly. Ideally, the gap D1 between the upper stator coil 21 and the rotor assembly, and the gap D2 between the lower stator coil 22 and the rotor assembly, should satisfy D1=D2. However, in actual assembly, it is sufficient to keep both D1 and D2 within the set range that ensures the compressor does not malfunction.

[0059] In some embodiments of the present invention, the set range of the stator-rotor gap is 0.48mm-0.52mm. If it exceeds 0.52mm or does not reach 0.48mm, it will lead to the deterioration of the compressor performance.

[0060] The rotor compressor with a dual-stator structure provided by this invention divides the stator-rotor gap into two parts. When both D1 and D2 are within a set range, during operation, the same driving current is applied to the upper stator coil 21 and the lower stator coil 22. The upper stator coil 21 and the lower stator coil 22 generate similar rotating magnetic fields that act on the rotor assembly 3, forming a magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field, generating current and thus generating rotation. Since both D1 and D2 are within the set range, the magnetoelectric rotational torque generated by the upper stator coil 21 is basically the same as the magnetoelectric rotational torque generated by the lower stator coil 22, thereby ensuring that the rotor assembly is subjected to uniform force.

[0061] If either D1 or D2 is outside the set range, the magnetoelectric rotational torque formed by the upper stator coil 21 or the lower stator coil 22 will be abnormal, resulting in a mismatch between the magnetoelectric rotational torque formed by the upper stator coil 21 and the magnetoelectric rotational torque formed by the lower stator coil 22. This will cause the upper and lower parts of the rotor assembly to be subjected to inconsistent forces, that is, the rotor assembly 3 as a whole will be subjected to uneven forces, resulting in vibration and noise from the compressor.

[0062] If both D1 and D2 are outside the set range, the magnetoelectric rotational torque generated by the upper stator coil 21 and the lower stator coil 22 will be abnormal, causing the compressor to generate vibration noise.

[0063] In existing designs, the stator-rotor gap is often not an overall anomaly. It may be caused by factors such as wear during use or collisions during assembly, resulting in the stator-rotor gap in a certain part exceeding the set range. When using a gap gauge to detect the stator-rotor gap, it is necessary to measure the stator-rotor gap in different areas and parts multiple times. However, based on the design of the upper stator coil 21 and the lower stator coil 22 in this invention, the overall design pressure of the stator-rotor gap can be distributed to the stator-rotor gap design of the two areas, reducing the detection range of the stator-rotor gap. Combined with the stator-rotor gap detection method proposed in this invention, it is possible to detect whether the stator-rotor gap is abnormal without using a gap gauge.

[0064] First, in the design study, the following data were collected for qualified compressors where the gap between the stator and rotor was within the set range:

[0065] The same current L was applied to the stator coils, and the rotational speeds of the stator coils driving the rotor were collected under different gaps. The data are shown in Table 1 below.

[0066] Table 1

[0067] Stator-rotor clearance (mm) Rotor speed (rpm) 0.48 R1 0.49 R2 0.50 R3 0.51 R4 0.52 R5

[0068] That is, when the same driving current is applied to the stator coil, the rotor speed is different under different gaps; usually, the speed fluctuation is within 10 rpm under the same driving current and different gaps.

[0069] In some embodiments of the present invention, such as Figure 7 As shown, the storage module 71 stores the relationship data between the compressor stator-rotor gap and the rotor assembly speed under the same drive current, that is, the data shown in Table 1, which is obtained by collecting data from qualified compressors.

[0070] Combining the above research with the dual-stator coil structure proposed in this invention, such as Figure 7 As shown, the rotary compressor provided by this invention further includes:

[0071] Stator-rotor gap detection module 5, which operates a stator-rotor gap detection method, such as... Figure 8 As shown, the method for detecting the stator-rotor gap includes the following steps:

[0072] Step S1: Apply the first driving current to the upper stator coil and record the first rotational speed of the rotor assembly.

[0073] A first driving current is applied to the upper stator coil 21, which generates a first rotating magnetic field. The first rotating magnetic field acts on the rotor assembly 3, forming a first magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field, generating current, so that the rotor assembly 3 rotates at a first speed under the action of the magnetic field.

[0074] Step S2: Apply the first driving current to the lower stator coil and record the second rotational speed of the rotor assembly.

[0075] A first driving current is applied to the lower stator coil 22, and the lower stator coil 21 generates a second rotating magnetic field. The second rotating magnetic field acts on the rotor assembly 3, forming a second magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field to generate current, so that the rotor assembly 3 rotates at a second speed under the action of the magnetic field.

[0076] Step S3: Determine whether the rotor-stator clearance of the compressor is within the set range based on the first speed and / or the second speed.

[0077] As shown in the statistical data in Table 1, given the driving current of the stator coil, different stator-rotor gaps result in different magnetoelectric forces generated by the stator coil, leading to different driving torques applied to the rotor coil, and thus different rotor assembly speeds. Therefore, the stator-rotor gap of the compressor can be determined by the first speed and / or the second speed.

[0078] like Figure 9One embodiment of step S3 shown is as follows:

[0079] Step S31: Determine whether the first speed and / or the second speed are within the set speed range.

[0080] The set speed range here refers to the data shown in Table 1. Under a given first drive current, the range of stator-rotor gap under normal operation of the compressor corresponds to the set speed range. Usually, the stator-rotor gap is 0.48mm-0.52mm, so the set speed range is R1-R5.

[0081] Step S32: When the first speed and / or the second speed are not within the set speed range, determine that the stator-rotor gap is not within the set range.

[0082] When the first speed and / or the second speed are not within the range of R1-R5, the corresponding stator-rotor clearance is not within the set range of 0.48mm-0.52mm, which indicates that the stator-rotor clearance is abnormal and needs to be repaired and improved.

[0083] Based on the rotor compressor with a dual-stator structure provided in this invention, the area with abnormal gap can be accurately located by means of partition detection. Therefore, only one stator coil can be energized for detection. When an abnormal gap is found, it can be determined that the gap between the stator and rotor is abnormal.

[0084] In some embodiments of the present invention, such as Figure 10 As shown, the following method is used to detect the stator-rotor gap after the compressor is sealed.

[0085] Step S91: Apply the first driving current to the upper stator coil and record the first rotational speed of the rotor assembly.

[0086] A first driving current is applied to the upper stator coil 21, which generates a first rotating magnetic field. The first rotating magnetic field acts on the rotor assembly 3, forming a first magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field, generating current, so that the rotor assembly 3 rotates at a first speed under the action of the magnetic field.

[0087] Step S92: Determine whether the first rotational speed is within the set range.

[0088] The set speed range here refers to the data shown in Table 1. Under a given first drive current, the stator-rotor gap range under normal compressor operation corresponds to the set speed range. Typically, a stator-rotor gap of 0.48mm-0.52mm is considered normal, so the set speed range is R1-R5. When it is within the set range, proceed to step S94; otherwise, proceed to step S93.

[0089] Step S93: Determine if the compressor has an abnormal stator-rotor clearance.

[0090] The stator-rotor clearance was determined to be abnormal, requiring rework and improvement.

[0091] Step S94: Apply a first driving current to the lower stator coil and record the second rotational speed of the rotor assembly.

[0092] A first driving current is applied to the lower stator coil 22, and the lower stator coil 21 generates a second rotating magnetic field. The second rotating magnetic field acts on the rotor assembly 3, forming a second magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field to generate current, so that the rotor assembly 3 rotates at a second speed under the action of the magnetic field.

[0093] Step S95: Determine whether the second speed is within the set speed range.

[0094] If the value is within the set range, proceed to step S96; otherwise, proceed to step S93.

[0095] Step S96: Determine that the compressor stator-rotor clearance meets the requirements.

[0096] In some embodiments of the present invention, such as Figure 11 As shown, the following method is used to detect the stator-rotor gap after the compressor is sealed.

[0097] Step S101: Apply the first driving current to the upper stator coil.

[0098] A first driving current is applied to the upper stator coil 21, which generates a first rotating magnetic field. The first rotating magnetic field acts on the rotor assembly 3, forming a first magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field, generating current, which causes the rotor assembly 3 to rotate under the action of the magnetic field.

[0099] Step S102: After a set stable running time, record the first rotational speed of the rotor assembly.

[0100] Step S103: Determine whether the first rotational speed is within the set range.

[0101] The set speed range here refers to the data shown in Table 1. Under a given first drive current, the stator-rotor gap range under normal compressor operation corresponds to the set speed range. Typically, a stator-rotor gap of 0.48mm-0.52mm is considered normal, so the set speed range is R1-R5. When it is within the set range, proceed to step S105; otherwise, proceed to step S104.

[0102] Step S104: Determine if the compressor has an abnormal stator-rotor clearance.

[0103] The stator-rotor clearance was determined to be abnormal, requiring rework and improvement.

[0104] Step S105: Apply the first driving current to the lower stator coil.

[0105] A first driving current is applied to the lower stator coil 22, and the lower stator coil 21 generates a second rotating magnetic field. The second rotating magnetic field acts on the rotor assembly 3, forming a second magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field to generate current, causing the rotor assembly 3 to rotate under the action of the magnetic field.

[0106] Step S106: After a set stable running time, record the second rotational speed of the rotor assembly.

[0107] Step S107: Determine whether the second speed is within the set speed range.

[0108] If the value is within the set range, proceed to step S108; otherwise, proceed to step S104.

[0109] Step S108: Determine that the compressor stator-rotor clearance meets the requirements.

[0110] In the above embodiments of the present invention, in order to improve the detection accuracy of the stator-rotor gap of the rotary compressor and reduce the detection difficulty, a stator partition design structure is adopted to distribute the detection pressure of the stator-rotor gap to two partitions, thereby narrowing the detection range of the stator-rotor gap, enabling precise detection and location of gap abnormalities. Combined with the statistical relationship between the stator-rotor gap and the rotor speed under the same drive current applied to the stator, it is possible to detect the stator-rotor gap even after the compressor's outer casing is sealed.

[0111] Therefore, this invention also proposes an air conditioner that performs a refrigeration cycle by using a compressor, a condenser, an expansion valve, and an evaporator. The compressor is a rotary compressor as described in the above embodiments of this invention, and the refrigeration cycle involves compression, condensation, expansion, and evaporation to cool or heat the indoor space.

[0112] Low-temperature, low-pressure refrigerant enters the compressor, which compresses it into a high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0113] In the above embodiments of the present invention, when an abnormality is detected in the stator-rotor gap by means of stator-rotor gap detection, the present invention provides a corresponding rework method for abnormal gap conditions.

[0114] like Figure 12 As shown, in some embodiments of the present invention, the rotary compressor further includes:

[0115] The drive module 6, which is driven by the compressor, is suitable for rework and improvement when the stator-rotor gap detection module 5 detects an abnormality in the stator-rotor gap.

[0116] As shown in Table 1 above, the research and design revealed that when the same driving current is applied to the stator coils, the driving torque generated by the stator on the rotor varies under different gaps, resulting in different rotor speeds. To avoid different driving torques due to varying rotor-stator gaps, the driving current applied to the stator coils cannot be the same under different gaps to ensure the same driving torque. The relationship between the driving current of the stator coils under different gaps with the same driving torque is statistically shown in Table 2 below.

[0117] Table 2

[0118] Stator-rotor clearance (mm) Drive current 0.48 L1 0.49 L2 0.50 L3 0.51 L4 0.52 L5

[0119] In some embodiments of the present invention, such as Figure 12 As shown, the storage module 72 stores the relationship data between the compressor stator-rotor gap and the drive current of the stator coil under the same driving torque, which is, for example, the data shown in Table 2. This relationship data is obtained by collecting data from qualified compressors.

[0120] In summary, such as Figure 13 As shown, when an abnormality in the stator-rotor clearance is detected, the compressor drive method provided by this invention can improve the compressor by readjusting the stator-rotor clearance without disassembling the compressor casing, ensuring that the driving torque applied by the upper and lower stators to the rotor assembly is consistent, and guaranteeing the normal operation of the compressor. Specifically, this includes:

[0121] Step S121: Apply the first driving current to the upper stator coil and record the first rotational speed of the rotor assembly.

[0122] A first driving current is applied to the upper stator coil 21, which generates a first rotating magnetic field. The first rotating magnetic field acts on the rotor assembly 3, forming a first magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field, generating current, so that the rotor assembly 3 rotates at a first speed under the action of the magnetic field.

[0123] Step S122: Determine the first gap between the upper stator coil and the rotor assembly based on the first rotational speed.

[0124] Based on the information shown in Table 1, and considering the relationship between different gaps and rotor speed under the same driving current, the gap between the upper stator coil and the rotor assembly is determined according to the first speed, and is defined as the first gap.

[0125] Step S123: Apply a first driving current to the lower stator coil and record the second rotational speed of the rotor assembly.

[0126] A first driving current is applied to the lower stator coil 22, and the lower stator coil 21 generates a second rotating magnetic field. The second rotating magnetic field acts on the rotor assembly 3, forming a second magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field to generate current, so that the rotor assembly 3 rotates at a second speed under the action of the magnetic field.

[0127] Step S124: Determine the second gap between the lower stator coil and the rotor assembly based on the second rotational speed.

[0128] Based on the information shown in Table 1, and considering the relationship between different gaps and rotor speed under the same driving current, the gap between the upper stator coil and the rotor assembly is determined according to the second speed, and is thus defined as the second gap.

[0129] Step S125: Determine the corrected drive current of the upper stator coil and the lower stator coil based on the first gap and the second gap.

[0130] Based on the information shown in Table 2, and considering the relationship between different gaps and the stator coil driving current under the same driving torque, the driving current of the upper stator coil is determined according to the first gap, and the driving current of the lower stator coil is determined according to the second gap.

[0131] Step S126: Update the drive current of the upper stator coil and the lower stator coil to the corrected drive current.

[0132] The corrected drive current here includes the upper stator corrected drive current and the lower stator corrected drive current.

[0133] Step S127: Drive the upper stator coil and the lower stator coil using a modified drive current.

[0134] Based on the rotor compressor with a dual-stator structure provided in this invention, the area with abnormal gap can be accurately located by partition detection. After the abnormal gap is located, the drive current of the upper and lower stator coils is corrected by the drive method given above, so as to achieve the purpose of consistent drive torque applied to the rotor assembly. Thus, the compressor abnormality caused by the stator-rotor gap can be corrected without removing the compressor housing, ensuring the stable operation of the rotor assembly and reducing the difficulty of compressor rework.

[0135] In some embodiments of the present invention, such as Figure 14 As shown, the compressor driving method when an abnormal stator-rotor clearance is detected includes the following steps:

[0136] Step S131: Apply the first driving current to the upper stator coil and record the first rotational speed of the rotor assembly.

[0137] A first driving current is applied to the upper stator coil 21, which generates a first rotating magnetic field. The first rotating magnetic field acts on the rotor assembly 3, forming a first magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field, generating current, so that the rotor assembly 3 rotates at a first speed under the action of the magnetic field.

[0138] Step S132: Determine the first gap between the upper stator coil and the rotor assembly based on the first rotational speed.

[0139] Based on the information shown in Table 1, and considering the relationship between different gaps and rotor speed under the same driving current, the gap between the upper stator coil and the rotor assembly is determined according to the first speed, and is defined as the first gap.

[0140] Step S133: Apply a first driving current to the lower stator coil and record the second rotational speed of the rotor assembly.

[0141] A first driving current is applied to the lower stator coil 22, and the lower stator coil 21 generates a second rotating magnetic field. The second rotating magnetic field acts on the rotor assembly 3, forming a second magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field to generate current, so that the rotor assembly 3 rotates at a second speed under the action of the magnetic field.

[0142] Step S134: Determine the second gap between the lower stator coil and the rotor assembly based on the second rotational speed.

[0143] Based on the information shown in Table 1, and considering the relationship between different gaps and rotor speed under the same driving current, the gap between the upper stator coil and the rotor assembly is determined according to the second speed, and is thus defined as the second gap.

[0144] Step S135: Determine the ratio of the driving current of the upper stator coil to that of the lower stator coil based on the first gap and the second gap.

[0145] Based on the information shown in Table 2, and considering the relationship between different gaps and the stator coil drive current under the same driving torque, the drive current of the upper stator coil is determined according to the first gap, and the drive current of the lower stator coil is determined according to the second gap. Thus, the ratio of the drive currents of the upper and lower stator coils can be determined.

[0146] Step S136: Correct the drive current of the upper stator coil and the lower stator coil based on the ratio of the drive current of the upper stator coil and the lower stator coil.

[0147] Step S137: Drive the upper stator coil and the lower stator coil using the modified drive current.

[0148] In some embodiments of the present invention, such as Figure 15 As shown, the compressor driving method when an abnormal stator-rotor clearance is detected includes the following steps:

[0149] Step S141: Apply the first driving current to the upper stator coil and record the first rotational speed of the rotor assembly.

[0150] A first driving current is applied to the upper stator coil 21, which generates a first rotating magnetic field. The first rotating magnetic field acts on the rotor assembly 3, forming a first magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field, generating current, so that the rotor assembly 3 rotates at a first speed under the action of the magnetic field.

[0151] Step S142: Determine the first gap between the upper stator coil and the rotor assembly based on the first rotational speed.

[0152] Based on the information shown in Table 1, and considering the relationship between different gaps and rotor speed under the same driving current, the gap between the upper stator coil and the rotor assembly is determined according to the first speed, and is defined as the first gap.

[0153] Step S143: Apply a first driving current to the lower stator coil and record the second rotational speed of the rotor assembly.

[0154] A first driving current is applied to the lower stator coil 22, and the lower stator coil 21 generates a second rotating magnetic field. The second rotating magnetic field acts on the rotor assembly 3, forming a second magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field to generate current, so that the rotor assembly 3 rotates at a second speed under the action of the magnetic field.

[0155] Step S144: Determine the second gap between the lower stator coil and the rotor assembly based on the second rotational speed.

[0156] Based on the information shown in Table 1, and considering the relationship between different gaps and rotor speed under the same driving current, the gap between the upper stator coil and the rotor assembly is determined according to the second speed, and is thus defined as the second gap.

[0157] Step S145: Determine the ratio of the driving current of the upper stator coil to that of the lower stator coil based on the first gap and the second gap.

[0158] Based on the information shown in Table 2, and considering the relationship between different gaps and the stator coil drive current under the same driving torque, the drive current of the upper stator coil is determined according to the first gap, and the drive current of the lower stator coil is determined according to the second gap. Thus, the ratio of the drive currents of the upper and lower stator coils can be determined.

[0159] Step S146: Correct the drive current of the upper and lower stator coils at different operating frequencies of the compressor based on the ratio of the drive current of the upper and lower stator coils.

[0160] The control parameters of the driver program are reset by using the ratio of the drive current of the upper stator coil and the lower stator coil. These control parameters include at least the drive current of the upper stator coil and the drive current of the lower stator coil at different operating frequencies of the compressor. When the ratio of the drive current of the upper stator coil and the lower stator coil is determined, the drive current of the upper and lower stator coils at different operating frequencies of the compressor can be corrected again using the determined current ratio relationship.

[0161] Step S147: Drive the upper stator coil and the lower stator coil using the modified drive current.

[0162] In some embodiments of the present invention, such as Figure 16 As shown, the compressor driving method when an abnormal stator-rotor clearance is detected includes the following steps:

[0163] Step S151: Apply the first driving current to the upper stator coil and record the first rotational speed of the rotor assembly.

[0164] A first driving current is applied to the upper stator coil 21, which generates a first rotating magnetic field. The first rotating magnetic field acts on the rotor assembly 3, forming a first magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field, generating current, so that the rotor assembly 3 rotates at a first speed under the action of the magnetic field.

[0165] Step S152: Determine the first gap between the upper stator coil and the rotor assembly based on the first rotational speed.

[0166] Based on the information shown in Table 1, and considering the relationship between different gaps and rotor speed under the same driving current, the gap between the upper stator coil and the rotor assembly is determined according to the first speed, and is defined as the first gap.

[0167] Step S153: Apply a first driving current to the lower stator coil and record the second rotational speed of the rotor assembly.

[0168] A first driving current is applied to the lower stator coil 22, and the lower stator coil 21 generates a second rotating magnetic field. The second rotating magnetic field acts on the rotor assembly 3, forming a second magnetoelectric rotational torque. The rotor assembly 3 is cut by magnetic lines of force in the rotating magnetic field to generate current, so that the rotor assembly 3 rotates at a second speed under the action of the magnetic field.

[0169] Step S154: Determine the second gap between the lower stator coil and the rotor assembly based on the second rotational speed.

[0170] Based on the information shown in Table 1, and considering the relationship between different gaps and rotor speed under the same driving current, the gap between the upper stator coil and the rotor assembly is determined according to the second speed, and is thus defined as the second gap.

[0171] Step S155: Determine the ratio of the driving current of the upper stator coil to that of the lower stator coil based on the first gap and the second gap.

[0172] Based on the information shown in Table 2, and considering the relationship between different gaps and the stator coil drive current under the same driving torque, the drive current of the upper stator coil is determined according to the first gap, and the drive current of the lower stator coil is determined according to the second gap. Thus, the ratio of the drive currents of the upper and lower stator coils can be determined.

[0173] Step S156: Reset the compressor drive using the drive current ratio.

[0174] In some embodiments of the present invention, the compressor operating mode can be switched, for example, from the factory mode to the correction mode. In the correction mode, the drive current applied to the upper stator coil and the lower stator coil is corrected by using the drive current ratio.

[0175] Step S157: During compressor operation, the drive current of the upper stator coil and the lower stator coil is set according to the drive current ratio at different operating frequencies of the compressor.

[0176] The control parameters of the driver program are reset by using the ratio of the drive current of the upper stator coil and the lower stator coil. These control parameters include at least the drive current of the upper stator coil and the drive current of the lower stator coil at different operating frequencies of the compressor. When the ratio of the drive current of the upper stator coil and the lower stator coil is determined, the drive current of the upper and lower stator coils at different operating frequencies of the compressor can be reset using the determined current ratio relationship.

[0177] In the above embodiments of the present invention, in order to reduce the difficulty of rework for abnormal stator-rotor clearance in compressors, a stator coil partition design is adopted, dividing the stator-rotor clearance into two parts. This partitioned approach improves the accuracy of locating clearance anomalies. During detection, the relationship between stator-rotor clearance and drive speed under the same drive current is used to determine whether the clearance between the upper stator and / or lower stator and the rotor is within a set range. When any one or two stator-rotor clearances are abnormal, the drive current of the upper stator coil and / or lower stator coil is corrected based on the relationship between stator-rotor clearance and drive current under the same drive torque. This ensures that the drive torque applied by the upper and lower stator coils to the rotor assembly is consistent. This not only enables the detection of abnormal stator-rotor clearance even after the compressor casing is welded, solving the problem that existing compressors cannot use clearance gauges to detect stator-rotor clearance after casing sealing, but also improves the factory pass rate of compressors and allows for the correction of clearance anomalies without removing the compressor casing.

[0178] Therefore, this invention also proposes an air conditioner that performs a refrigeration cycle by using a compressor, a condenser, an expansion valve, and an evaporator. The compressor is a rotary compressor as described in the above embodiments of this invention, and the refrigeration cycle involves compression, condensation, expansion, and evaporation to cool or heat the indoor space.

[0179] Low-temperature, low-pressure refrigerant enters the compressor, which compresses it into a high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0180] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0181] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A rotary compressor, comprising: A stator assembly and a rotor assembly, wherein the rotor assembly is assembled inside the stator assembly; The stator assembly is characterized in that it comprises: The gap between the upper stator coil and the rotor assembly forms a first gap; The gap between the lower stator coil and the rotor assembly forms a second gap; and it is integrated with the upper stator coil by clamps. The rotary compressor also includes: The stator-rotor gap detection module runs a stator-rotor gap detection method, the detection method including: Apply a first drive current to the upper stator coil and record the first rotational speed of the rotor assembly; and / or, A second drive current is applied to the lower stator coil, and the second rotational speed of the rotor assembly is recorded. Determine whether the compressor's stator-rotor clearance is within the set range based on the first speed and / or the second speed.

2. The rotary compressor according to claim 1, characterized in that, The stator-rotor clearance detection module determines whether the compressor's stator-rotor clearance is within a set range based on a first rotational speed and / or a second rotational speed, specifically including: Determine whether the first speed and / or the second speed are within the set speed range; When the first speed and / or the second speed are not within the set speed range, it is determined that the stator-rotor gap is not within the set range.

3. The rotary compressor according to claim 1, characterized in that, The stator-rotor gap detection method operated by the stator-rotor gap detection module is as follows: Apply the first driving current to the upper stator coil and record the first rotational speed of the rotor assembly; Determine if the first rotational speed is within the set range; If it is not within the set range, it indicates that the compressor's stator-rotor clearance is abnormal; If the first driving current is applied to the lower stator coil within the set range, the second rotational speed of the rotor assembly is recorded. Determine if the second rotational speed is within the set range; If the distance between the stator and rotor of the compressor is within the set range, the compressor's stator-rotor clearance is normal; if it is outside the set range, the compressor's stator-rotor clearance is abnormal.

4. The rotary compressor according to claim 1, characterized in that, The stator-rotor gap detection method operated by the stator-rotor gap detection module is as follows: Apply the first driving current to the upper stator coil; After a set stable operating time, record the first rotational speed of the rotor assembly; Determine if the first speed is within the set range; if not, determine that the compressor's stator-rotor clearance is abnormal. If within the set range, apply the first driving current to the lower stator coil; After a set period of stable operation, the second rotational speed of the rotor assembly is recorded; Determine if the second speed is within the set range; if not, determine that the compressor's stator-rotor clearance is abnormal. If it is within the set range, the rotor-stator clearance of the compressor is confirmed to meet the requirements.

5. The rotary compressor according to claim 1, characterized in that, The compressor includes: The storage module is used to store data on the relationship between the compressor stator-rotor gap and the rotor assembly speed under the same drive current.

6. An air conditioner employing a rotary compressor, said rotary compressor comprising: A stator assembly and a rotor assembly, wherein the rotor assembly is assembled inside the stator assembly; The stator assembly is characterized in that it comprises: The gap between the upper stator coil and the rotor assembly forms a first gap; The gap between the lower stator coil and the rotor assembly forms a second gap; and it is integrated with the upper stator coil by clamps. The air conditioner also includes: The stator-rotor gap detection module runs a stator-rotor gap detection method, the detection method including: Apply a first drive current to the upper stator coil and record the first rotational speed of the rotor assembly; and / or, A second drive current is applied to the lower stator coil, and the second rotational speed of the rotor assembly is recorded. Determine whether the compressor's stator-rotor clearance is within the set range based on the first speed and / or the second speed.

7. The air conditioner according to claim 6, characterized in that, The stator-rotor clearance detection module determines whether the compressor's stator-rotor clearance is within a set range based on a first rotational speed and / or a second rotational speed, specifically including: Determine whether the first speed and / or the second speed are within the set speed range; When the first speed and / or the second speed are not within the set speed range, it is determined that the stator-rotor gap is not within the set range.

8. The air conditioner according to claim 6, characterized in that, The stator-rotor gap detection method operated by the stator-rotor gap detection module is as follows: Apply the first driving current to the upper stator coil and record the first rotational speed of the rotor assembly; Determine if the first rotational speed is within the set range; If it is not within the set range, it indicates that the compressor's stator-rotor clearance is abnormal; If the first driving current is applied to the lower stator coil within the set range, the second rotational speed of the rotor assembly is recorded. Determine if the second rotational speed is within the set range; If the distance between the stator and rotor of the compressor is within the set range, the compressor's stator-rotor clearance is normal; if it is outside the set range, the compressor's stator-rotor clearance is abnormal.

9. The air conditioner according to claim 6, characterized in that, The stator-rotor gap detection method operated by the stator-rotor gap detection module is as follows: Apply the first driving current to the upper stator coil; After a set stable operating time, record the first rotational speed of the rotor assembly; Determine if the first speed is within the set range; if not, determine that the compressor's stator-rotor clearance is abnormal. If within the set range, apply the first driving current to the lower stator coil; After a set period of stable operation, the second rotational speed of the rotor assembly is recorded; Determine if the second speed is within the set range; if not, determine that the compressor's stator-rotor clearance is abnormal. If it is within the set range, the rotor-stator clearance of the compressor is confirmed to meet the requirements.

10. The air conditioner according to claim 6, characterized in that, The air conditioner includes: The storage module is used to store data on the relationship between the compressor stator-rotor gap and the rotor assembly speed under the same drive current.

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