Low-profile, balanced compressor motor and refrigerator

Abstract

FIELD: compressor equipment.SUBSTANCE: group of inventions relates to a low-profile compressor motor with balanced characteristics and to a refrigerator. The compressor motor with balanced characteristics includes a stator core (10), stator winding units (20), and a compressor cylinder unit (30). The annular space inside the core (10) is intended for installation of the rotor. The assemblies (20) are located on the core (10) around the outer side of the annular space. The assemblies (20) are arranged sequentially along the arc except for the recess (100) and diagonally on the core (10), thereby reducing magnetic field harmonics and improving electromagnetic characteristics. The compressor cylinder unit (30) is installed above the core (10). The head of the unit (30) is located in the recess (100) in such a way that the height of the unit (30) is reduced.EFFECT: optimizing the low-profile design, as well as improving the performance, reliability and technology of the refrigeration compressor, while simultaneously reducing the level of noise and vibration in order to meet the need of modern household appliances for highly efficient, compact refrigeration compressors with low noise levels.8 cl, 9 dwg

Description

AREA OF TECHNOLOGY

[0001] This application relates to the field of compressor equipment technology, in particular to a low-profile compressor motor with balanced characteristics and a refrigerator. BACKGROUND TO THE INVENTION

[0002] To meet the increasing demands for space efficiency and performance in modern home appliances, the design of refrigeration compressors is constantly being optimized. Traditional refrigeration compressors, due to their relatively large height and dimensions, do not meet the compactness requirements of modern home appliances. To address this issue, prior art has developed a refrigeration compressor with a low-profile design (as shown in CN Patent No. 116877377 A). This design reduces the overall compressor height by providing recesses on key components such as the cylinder base and crankshaft assembly, thereby better meeting the installation requirements of compact home appliances such as miniature ice makers, dehumidifiers, and water dispensers.

[0003] However, while the existing low-profile design has allowed for a certain reduction in height, it also has several obvious drawbacks. First, to avoid increasing the engine's overall height, the cylinder head must protrude significantly forward, extending beyond the engine's outer surface, thereby creating a "drooped cylinder head" design. This design requires the use of extended connecting rods, resulting in an excessively long force arm, which not only degrades overall performance but also causes increased mechanical wear, significantly shortening the compressor's service life. Second, the middle section of the connection between the cylinder head and crankcase is recessed, reducing structural strength.Furthermore, the cylinder head is significantly removed from the engine's center, creating an unstable structure with a high center of gravity and poor balance. This, in turn, causes problems such as noise and vibration, which seriously degrade the user experience. Furthermore, since the rear of the cylinder is not hollow, the cylinder bore cannot be machined as a through-hole. As a result, the honing tool cannot machine the cylinder bore from top to bottom. This can easily lead to problems such as edge roll-off, thereby increasing the complexity and cost of machining.

[0004] In order to address the above-mentioned shortcomings of the existing refrigeration compressor with a low-profile structure, the present application proposes a new design that can overcome the shortcomings of the prior art, further optimize the low-profile structure, and improve the performance, reliability and manufacturability of the refrigeration compressor, while reducing the noise and vibration levels, so as to meet the demand of modern household appliances for high-efficiency, compact and low-noise refrigeration compressors. SUMMARY OF THE INVENTION

[0005] Considering the above, the present application discloses a low-profile compressor motor with balanced characteristics and a refrigerator aimed at solving the above technical problems.

[0006] In order to achieve the above objectives, the following technical solutions are adopted in this application.

[0007] Low profile compressor motor with balanced characteristics includes:

[0008] stator core, and the annular space inside the stator core is designed for installing the rotor;

[0009] stator winding units, wherein the number of stator winding units is multiple, the plurality of stator winding units are arranged on the stator core along the circumference from the outer annular space, the plurality of stator winding units are arranged sequentially along the arc except for the recess, and the stator winding units are arranged diagonally on the stator core, thereby reducing the harmonics of the magnetic field, improving the electromagnetic characteristics; and

[0010] compressor cylinder block, wherein the compressor cylinder block is located above the stator core, and the compressor cylinder head is placed in a recess so as to reduce the height of the compressor cylinder block.

[0011] By adopting the above technical solutions, this application effectively reduces the height of the cylinder block by creating a recess in the stator core to accommodate the compressor cylinder head, thereby realizing a low-profile design for the overall compressor structure and meeting the compactness requirements of modern household appliances. Although the number of stator winding assemblies was reduced to achieve the low-profile design, the stator winding assemblies are arranged diagonally to reduce magnetic field harmonics and improve electromagnetic performance, ensuring that the motor performance does not degrade due to the reduced height. This design not only reduces the compressor height but also ensures balanced performance, allowing the compressor to maintain high operating efficiency while maintaining a compact size.Diagonally arranged stator winding assemblies not only optimize magnetic field distribution but also improve motor efficiency and stability. This design allows the motor to maintain high electromagnetic performance even with a reduced number of winding assemblies, thereby optimizing performance with a low-profile design.

[0012] Preferably, in the aforementioned low-profile compressor motor with balanced characteristics, the stator winding conductor diameters are increased by 10-20%. Increasing the stator winding conductor diameter reduces winding resistance, thereby reducing copper losses and improving electrical conductivity and motor efficiency. By increasing the conductor diameter while reducing the number of windings to achieve a low-profile design, the overall motor performance is maintained, thereby ensuring that performance is not compromised by reducing the height.

[0013] The aforementioned low-profile, balanced-characteristic compressor motor preferably has an annular oil groove at the rear of the compressor cylinder block. During compressor operation, refrigerant motor oil flows into the annular oil groove and dissipates heat from the stator windings. By providing an annular oil groove at the rear of the cylinder block and using refrigerant motor oil to dissipate heat generated by the stator windings, heat dissipation efficiency is significantly improved, ensuring the stability and reliability of the motor over long periods of operation. Good heat dissipation helps reduce the likelihood of motor failure caused by overheating and prolong its service life.

[0014] The aforementioned low-profile, balanced-performance compressor motor preferably uses a stator core made of 250 silicon steel. Compared with traditional materials, 250 silicon steel is chosen for its stator core material because it has higher resistance and can significantly reduce steel loss, lower energy consumption during motor operation, and improve motor efficiency. The high magnetic flux density of 250 silicon steel allows the motor to achieve the same magnetic flux with a smaller size / volume, further improving motor performance while reducing material consumption and costs.

[0015] Preferably, in the aforementioned low-profile compressor motor with balanced characteristics, the rotor magnet height is increased by 10-15%. The increased rotor magnet height increases the motor's magnetic field strength, thereby improving the motor's output power and efficiency. The motor can produce higher output power with the same input power, meeting higher compression ratio requirements. By adjusting the rotor magnet height, the electromagnetic design of the motor is optimized, further improving the overall motor performance and making it more suitable for use in low-profile compressors.

[0016] Preferably, in the aforementioned low-profile, balanced-characteristic compressor motor, a radially inwardly recessed lightening recess is located on the sidewall of the stator core, corresponding to the recess. The radially inwardly recessed lightening recess located on the sidewall of the stator core reduces the weight of the stator core and reduces material costs without adversely affecting the motor's performance. The design of the lightening recess makes the stator core design more rational, further optimizes the overall design of the low-profile compressor, and improves the compactness and stability of the structure.

[0017] Preferably, in the aforementioned low-profile compressor motor with balanced characteristics, a plurality of winding unit mounting slots are formed on the stator core, arranged at intervals in the rotor circumferential direction, wherein the winding unit mounting slots extend in the axial direction of the annular space, and teeth are formed between adjacent winding unit mounting slots, and the stator winding units pass through the winding unit mounting slots and are wound on the teeth. This design, in which the stator core comprises a plurality of winding unit mounting slots, teeth are formed between adjacent mounting slots, and the stator winding units pass through the winding unit mounting slots and are wound on the teeth, ensures a more uniform winding distribution, further optimizes the magnetic field distribution, and improves the electromagnetic characteristics of the motor.The rational arrangement of windings and the design of teeth increase the structural strength of the stator core, making the motor more stable and reliable in operation.

[0018] Preferably, in the aforementioned low-profile compressor motor with balanced characteristics, the number of teeth is matched to the number of stator winding units. This ensures that each winding unit has a corresponding winding tooth, resulting in a more uniform winding distribution, further reducing magnetic field harmonics, and improving motor efficiency and stability. The match between the number of teeth and winding units further optimizes the motor's electromagnetic performance, ensuring consistent motor performance after switching to a low-profile design.

[0019] Preferably, in the aforementioned low-profile compressor motor with balanced characteristics, the opening size of the two mounting slots of the winding units directly adjacent to and on either side of the recess is half the opening size of the remaining mounting slots of the winding units. By adjusting the opening size of the mounting slots of the winding units, the heat dissipation design is optimized while maintaining the motor's characteristics, achieving a balance between heat dissipation requirements and motor performance, thereby improving the overall performance and reliability of the motor.

[0020] This application also provides a refrigerator that incorporates the above-mentioned low-profile compressor motor with balanced characteristics.

[0021] By adopting the above technical solutions, this application utilizes a low-profile compressor motor with balanced characteristics in refrigerators, reducing the height of the refrigerator compressor, thereby freeing up more space inside the refrigerator, increasing its capacity, and improving the refrigerator's performance and user experience. The low-profile compressor motor is not only suitable for refrigerators but can also be widely used in other small household appliances, such as compact ice makers, dehumidifiers, and water dispensers, expanding the compressor's application range and meeting the compactness requirements of various household appliances.

[0022] As can be seen from the above technical solutions, compared with the previous prior art, the present application provides a low-profile compressor motor with balanced characteristics and a refrigerator, which have the following beneficial effects.

[0023] 1. Balance between height reduction and performance: By arranging the cylinder head in the recess of the stator core, the compressor height is reduced, achieving a low-profile design; at the same time, the stator winding assemblies are arranged diagonally to reduce magnetic field harmonics, improve electromagnetic performance, and avoid performance degradation due to height reduction, thus achieving a balance between space optimization and performance maintenance.

[0024] 2. Winding optimization: The conductor diameter of the stator winding units is increased to reduce winding resistance, reduce copper loss, and maintain electrical conductivity; and an annular oil groove is provided at the rear of the cylinder block to allow the coolant engine oil to flow and dissipate heat, thereby improving heat dissipation efficiency, ensuring stable engine operation and prolonging its service life.

[0025] 3. Improvements in materials and design: The stator core is made of 250 silicon steel to reduce iron loss and improve motor efficiency; the rotor magnet height is increased to enhance magnetic field strength and increase output power; and a lightweight recess is made on the side wall of the stator core to reduce costs and optimize the design.

[0026] 4. Comprehensive performance improvement: The stator core adopts winding mounting slots and teeth to optimize the winding arrangement and uniform magnetic field distribution; the number of teeth corresponds to the number of winding units to reduce magnetic field harmonics; and the opening size of the winding mounting slots on both sides of the recess is optimized to balance heat dissipation and performance.

[0027] 5. Expanding the application field: The low-profile compressor motor is suitable for small-sized household appliances such as refrigerators, reducing the height of the compressor, increasing the capacity of refrigerators, improving the performance and user experience, and at the same time expanding the application field of compressors to meet the demand for compactness.BRIEF DESCRIPTION OF DRAWINGS

[0028] To more clearly demonstrate the technical solutions of the embodiments of the present application or the prior art, the drawings necessary for use in the embodiments or the prior art will be briefly presented below. It is obvious that the drawings in the following description are merely examples of the implementation of the present application. A person skilled in the art can derive other drawings based on the provided drawings without creative work.

[0029] FIG. 1 is a schematic diagram of an exploded view of a low-profile balanced-characteristic compressor motor according to the present application, viewed from above;

[0030] FIG. 2 is a schematic diagram of an exploded view of a low-profile balanced-characteristic compressor motor according to the present application, viewed from below;

[0031] FIG. 3 is a schematic half-sectional view of a low-profile balanced-characteristic compressor motor according to the present application;

[0032] FIG. 4 is a structural schematic diagram of a low-profile balanced-characteristic compressor motor according to the present application, viewed from above;

[0033] FIG. 5 is a structural schematic diagram of a low-profile balanced-characteristic compressor motor according to the present application, viewed from below;

[0034] FIG. 6 is a structural schematic diagram of a stator core according to the present application, viewed from above;

[0035] FIG. 7 is a structural schematic diagram of a stator core according to the present application, viewed from below;

[0036] FIG. 8 is a structural schematic diagram of a compressor cylinder block according to the present application, viewed from above; and

[0037] FIG. 9 is a structural schematic diagram of a compressor cylinder block according to the present application, viewed from below.

[0038] On the drawings:

[0039] 10 - stator core;

[0040] 100 - recess; 101 - relief recess; 102 - fastening grooves of winding units; 103 - tooth; 104 - annular space;

[0041] 20 - stator winding units;

[0042] 30 - compressor cylinder block;

[0043] 300 - head; 301 - annular oil groove. DETAILED DESCRIPTION OF EXECUTION OPTIONS

[0044] The technical solutions in the embodiments of the present application will be described below in detail and fully in conjunction with the drawings of the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all possible embodiments. Based on the embodiments disclosed in the present application, all other embodiments that can be obtained by a person skilled in the art without creative efforts fall within the scope of protection of the present application.

[0045] Referring to FIGS. 1-9, embodiments of the present application disclose a low-profile, balanced-characteristic compressor motor including:

[0046] stator core 10, wherein the annular space 104 inside the stator core 10 is used for installing the rotor;

[0047] stator winding units 20, wherein the number of stator winding units 20 is plural, the plurality of stator winding units 20 are arranged on the stator core 10 around the outer side of the annular space 104, the plurality of stator winding units 20 are arranged sequentially along an arc to form a recess 100, and the stator winding units 20 are arranged diagonally on the stator core 10, thereby reducing the harmonics of the magnetic field and improving the electromagnetic characteristics; and

[0048] a compressor cylinder block 30, wherein the compressor cylinder block 30 is located above the stator core 10, and the head 300 of the compressor cylinder block 30 is located in the recess 100, so that the height of the compressor cylinder block 30 is reduced.

[0049] The stator winding assemblies are arranged diagonally, reducing magnetic field harmonics and improving electromagnetic performance. From an electric motor theory perspective, diagonally arranged winding assemblies achieve a more uniform magnetic field distribution. When the motor is running, the current in the stator winding assemblies generates magnetic fields, and the diagonally arranged winding assemblies cause these magnetic fields to interact with each other, canceling out some of the harmonic magnetic field. Based on the principle of superposition of magnetomotive forces, rationally designing the diagonal winding assemblies can enhance the primary magnetomotive force while effectively suppressing harmonic magnetomotive forces, thereby improving the motor's efficiency and performance and reducing vibration and noise during operation.

[0050] In order to further optimize the above technical solutions, the conductor diameter of the stator winding units (20) is increased by 10-20%. Increasing the conductor diameter of the stator winding units can reduce the winding resistance, reduce copper losses and maintain electrical conductivity. Specifically, if the conductor diameter of the original winding units was 1.0 mm, the conductor diameter of the optimized winding units can be increased to 1.1-1.2 mm. Based on the principles of electromagnetism, according to Ohm's law, R = ρ (L / A), where R denotes resistance, ρ is the specific resistance, L is the length of the conductor, and A is the cross-sectional area of ​​the conductor. Increasing the conductor diameter means increasing the cross-sectional area A, which leads to a decrease in resistance R, which in turn reduces the heat loss generated when current passes through the windings and improves the efficiency of the motor.

[0051] To further optimize the above technical solutions, an annular oil groove (301) is provided on the rear of the compressor cylinder block (30), while there is no oil drain hole at the bottom of the compressor cylinder block (30). During compressor operation, refrigerant engine oil flows into the annular oil groove (301) and dissipates heat from the stator winding assemblies.

[0052] In order to further optimize the above technical solutions, the stator core (10) is made of 250 silicon steel.

[0053] To further optimize the above technical solutions, the height of the rotor magnets is increased by 10-15%. If the height of the original rotor magnets is 30 mm, the height of the optimized rotor magnets can be increased to 33-34.5 mm.

[0054] In order to further optimize the above technical solutions, a radially inwardly deepened lightening recess (101) is located on the side wall of the stator core (10), corresponding to the recess 100.

[0055] In order to further optimize the above-mentioned technical solutions, the stator core (10) comprises a plurality of fastening grooves of winding units (102) arranged at intervals in the direction along the rotor circumference. The fastening grooves of the winding units (102) extend in the axial direction of the annular space (104), teeth (103) are formed between adjacent fastening grooves of the winding units (102), and each stator winding unit (20) passes through the corresponding fastening grooves of the winding units (102) and is wound on the corresponding tooth (103).

[0056] To further optimize the above technical solutions, the number of teeth (103) corresponds to the number of stator winding units (20).

[0057] In order to further optimize the above technical solutions, the opening size of the two fastening grooves of the winding units (102) directly adjacent to the recess (100) and located on both sides thereof is half the opening size of the remaining fastening grooves of the winding units (102).

[0058] In this description, embodiments are described sequentially, with each embodiment focusing on differences from other embodiments. The same or similar parts of various embodiments may be mutually referred to by corresponding descriptions. Since the device disclosed in an embodiment corresponds to the method disclosed in the embodiment, its description is given in abbreviated form; for a detailed description of the relevant parts, please refer to the sections describing the method.

[0059] The foregoing description of the disclosed embodiments enables one skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the present application. Therefore, the present invention is not intended to be limited to the embodiments described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Low profile compressor motor with balanced characteristics, including: a stator core (10), wherein the annular space (104) inside the stator core (10) is intended for installing the rotor; stator winding units (20); compressor cylinder block (30); wherein the stator winding units (20) are located on the stator core (10) around the outer side of the annular space (104), characterized in that the stator winding units (20) are arranged sequentially along the arc except for the recess (100), and the stator winding units (20) are arranged diagonally on the stator core (10), thereby reducing the harmonics of the magnetic field and improving the electromagnetic characteristics; and the compressor cylinder block (30) is installed above the stator core (10), and the head (300) of the compressor cylinder block (30) is located in the recess (100) in such a way that the height of the compressor cylinder block (30) is reduced.

2. A low-profile compressor motor with balanced characteristics according to claim 1, characterized in that an annular oil groove (301) is formed on the rear part of the compressor cylinder block (30), designed with the possibility of refrigerant motor oil entering it during the operation of the compressor to remove heat from the stator winding units.

3. A low-profile compressor motor with balanced characteristics according to paragraph 1, characterized in that the stator core (10) is made of 250 silicon steel.

4. A low-profile compressor motor with balanced characteristics according to claim 1, characterized in that a radially inwardly recessed lightening recess (101) is located on the side wall of the stator core (10), corresponding to the recess (100).

5. A low-profile compressor motor with balanced characteristics according to claim 1, characterized in that the stator core (10) contains fastening grooves of winding units (102) located at intervals in the direction along the circumference of the rotor, wherein the fastening grooves of the winding units (102) are formed in the axial direction of the annular space (104), between adjacent fastening grooves of the winding units (102) teeth (103) are formed respectively, and each winding unit of the stator (20) passes through the corresponding fastening groove of the winding units (102) and is wound on the corresponding tooth (103).

6. A low-profile compressor motor with balanced characteristics according to paragraph 5, characterized in that the number of teeth (103) corresponds to the number of winding units of the stator (20).

7. A low-profile compressor motor with balanced characteristics according to paragraph 6, characterized in that the size of the opening of the two fastening grooves of the winding units (102), directly adjacent to the recess (100) and on both sides of it, is half the size of the opening of the remaining fastening grooves of the winding units (102).

8. A refrigerator comprising a low-profile, balanced-characteristic compressor motor according to any one of claims 1 to 7, wherein the stator winding assemblies (20) are arranged on the stator core (10) around the outer side of the annular space (104), the stator winding assemblies (20) are arranged sequentially along an arc except for the recess (100), and the stator winding assemblies (20) are arranged diagonally on the stator core (10), and the head (300) of the compressor cylinder block (30) is located in the recess (100).

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